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| author | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2011-12-19 19:24:09 +0000 |
|---|---|---|
| committer | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2011-12-19 19:24:09 +0000 |
| commit | add995c32e86f9de8fa8fc05172435332c25a895 (patch) | |
| tree | 0191fde92a5c4dcd55a24b2aa760fa4c88713242 /nuttx/arch/x86 | |
| download | px4-firmware-add995c32e86f9de8fa8fc05172435332c25a895.tar.gz px4-firmware-add995c32e86f9de8fa8fc05172435332c25a895.tar.bz2 px4-firmware-add995c32e86f9de8fa8fc05172435332c25a895.zip | |
Completes coding of the PWM module
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4200 7fd9a85b-ad96-42d3-883c-3090e2eb8679
Diffstat (limited to 'nuttx/arch/x86')
61 files changed, 8322 insertions, 0 deletions
diff --git a/nuttx/arch/x86/include/README.txt b/nuttx/arch/x86/include/README.txt new file mode 100755 index 000000000..1f6cdeb91 --- /dev/null +++ b/nuttx/arch/x86/include/README.txt @@ -0,0 +1,31 @@ +arch/x86/include/README.txt
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+This directory holds x86-specific header files. The top-level header files in
+arch/x86/include simply include corresponding header files from lower lower-
+level chip-specific and architecture-specific directories.
+
+Architecture-Specific Directories
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Architecture-specific directories hold common header files for specific x86
+architectures. Separating these header file makes it easy to manage such
+things as differences in sizeof(long) on 32- and 64-bit x86 architectures.
+
+i486
+ This directory holds definitions appropriate for any instantiation of the
+ 32-bit i486 architecture.
+
+Chip-Specific directories
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The same x86 architecture may be realized in different chip implementations.
+For SoC chips, in particular, on-chip devices and differing interrupt
+structures may require special, chip-specific definitions in these chip-
+specific directories.
+
+qemu
+ This is the implementation of NuttX on the QEMU x86 simulation.
+
+
+
diff --git a/nuttx/arch/x86/include/arch.h b/nuttx/arch/x86/include/arch.h new file mode 100755 index 000000000..966bfbc56 --- /dev/null +++ b/nuttx/arch/x86/include/arch.h @@ -0,0 +1,91 @@ +/**************************************************************************** + * arch/x86/include/arch.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, only indirectly + * through arch/arch.h + */ + +#ifndef __ARCH_X86_INCLUDE_ARCH_H +#define __ARCH_X86_INCLUDE_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +/* Include chip-specific definitions */ + +# include <arch/chip/arch.h> + +/* Include architecture-specific definitions */ + +#ifdef CONFIG_ARCH_I486 +# include <arch/i486/arch.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ARCH_X86_INCLUDE_ARCH_H */ diff --git a/nuttx/arch/x86/include/i486/arch.h b/nuttx/arch/x86/include/i486/arch.h new file mode 100755 index 000000000..077c76626 --- /dev/null +++ b/nuttx/arch/x86/include/i486/arch.h @@ -0,0 +1,451 @@ +/**************************************************************************** + * arch/x86/include/i486/arch.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, + * only indirectly through nuttx/arch.h + */ + +#ifndef __ARCH_X86_INCLUDE_I486_ARCH_H +#define __ARCH_X86_INCLUDE_I486_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#ifndef __ASSEMBLY__ +# include <stdint.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* FLAGS bits */ + +#define X86_FLAGS_CF (1 << 0) /* Bit 0: Carry Flag */ + /* Bit 1: Reserved */ +#define X86_FLAGS_PF (1 << 2) /* Bit 2: Parity Flag */ + /* Bit 3: Reserved */ +#define X86_FLAGS_AF (1 << 4) /* Bit 4: Auxillary carry Flag */ + /* Bit 5: Reserved */ +#define X86_FLAGS_ZF (1 << 6) /* Bit 6: Zero Flag */ +#define X86_FLAGS_SF (1 << 7) /* Bit 7: Sign Flag */ +#define X86_FLAGS_TF (1 << 8) /* Bit 8: Trap Flag */ +#define X86_FLAGS_IF (1 << 9) /* Bit 9: Interrupt Flag */ +#define X86_FLAGS_DF (1 << 10) /* Bit 10: Direction Flag */ +#define X86_FLAGS_OF (1 << 11) /* Bit 11: Overflow Flag */ +#define X86_FLAGS_IOPL_SHIFT (12) /* Bits 12-13: IOPL mask (286+ only)*/ +#define X86_FLAGS_IOPL_MASK (3 << X86_FLAGS_IOPL_SHIFT) +#define X86_FLAGS_NT (1 << 14) /* Bit 14: Nested Task */ + /* Bit 15: Reserved */ + +/* EFLAGS bits (Extend the basic FLAGS bit definitions) */ + +#define X86_EFLAGS_RF (1 << 16) /* Bit 16: Resume Flag (386+ only) */ +#define X86_EFLAGS_VM (1 << 17) /* Bit 17: Virtual Mode (386+ only) */ +#define X86_EFLAGS_AC (1 << 18) /* Bit 18: Alignment Check (486SX+ only) */ +#define X86_EFLAGS_VIF (1 << 19) /* Bit 19: Virtual Interrupt Flag (Pentium+) */ +#define X86_EFLAGS_VIP (1 << 20) /* Bit 20: Virtual Interrupt Pending (Pentium+) */ +#define X86_EFLAGS_ID (1 << 21) /* Bit 21: CPUID detection flag (Pentium+) */ + +/* Programmable Interrupt Controller (PIC) */ + +/* Operational Control Words + * + * The first instruction the Operation Control Word 1 (OCW1) to set which + * IRQ's to mask and which IRQ's not to. + */ + +#define PIC1_OCW1 0x20 +#define PIC2_OCW1 0xa0 + +# define PIC1_OCW1_IRQ0 (1 << 0) /* IRQ0 System Timer */ +# define PIC1_OCW1_IRQ1 (1 << 1) /* IRQ1 Keyboard */ +# define PIC1_OCW1_IRQ2 (1 << 2) /* IRQ2 PIC2 */ +# define PIC1_OCW1_IRQ3 (1 << 3) /* IRQ3 Serial Port */ +# define PIC1_OCW1_IRQ4 (1 << 4) /* IRQ4 Serial Port */ +# define PIC1_OCW1_IRQ5 (1 << 5) /* IRQ5 Reserved/Sound Card */ +# define PIC1_OCW1_IRQ6 (1 << 6) /* IRQ6 Floppy Disk Controller */ +# define PIC1_OCW1_IRQ7 (1 << 7) /* IRQ7 Parallel Port */ +# define PIC1_OCW1_ALL + +# define PIC2_OCW1_IRQ8 (1 << 0) /* IRQ8 Real Time Clock */ +# define PIC2_OCW1_IRQ9 (1 << 1) /* IRQ9 Redirected IRQ2 */ +# define PIC2_OCW1_IRQ10 (1 << 2) /* IRQ10 Reserved */ +# define PIC2_OCW1_IRQ11 (1 << 3) /* IRQ11 Reserved */ +# define PIC2_OCW1_IRQ12 (1 << 4) /* IRQ12 PS/2 Mouse */ +# define PIC2_OCW1_IRQ13 (1 << 5) /* IRQ13 Maths Co-Processor */ +# define PIC2_OCW1_IRQ14 (1 << 6) /* IRQ14 Hard Disk Drive */ +# define PIC2_OCW1_IRQ15 (1 << 7) /* IRQ15 Reserved */ +# define PIC2_OCW1_ALL + +/* Operation Control Word 2 selects how the End of Interrupt (EOI) procedure + * works. The only thing of interest to us in this register is the non- + * specific EOI command, which we must send at the end of our ISR's. + */ + +#define PIC1_OCW2 0x20 +#define PIC2_OCW2 0xa0 + +# define PIC_OCW2_ACT_SHIFT (0) +# define PIC_OCW2_ACT_MASK (7 << PIC_OCW2_ACT_SHIFT) +# define PIC1_OCW2_ACT_IRQ0 (0 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 0 */ +# define PIC1_OCW2_ACT_IRQ1 (1 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 1 */ +# define PIC1_OCW2_ACT_IRQ2 (2 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 2 */ +# define PIC1_OCW2_ACT_IRQ3 (3 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 3 */ +# define PIC1_OCW2_ACT_IRQ4 (4 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 4 */ +# define PIC1_OCW2_ACT_IRQ5 (5 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 5 */ +# define PIC1_OCW2_ACT_IRQ6 (6 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 6 */ +# define PIC1_OCW2_ACT_IRQ7 (7 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 7 */ + +# define PIC2_OCW2_ACT_IRQ8 (0 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 8 */ +# define PIC2_OCW2_ACT_IRQ9 (1 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 9 */ +# define PIC2_OCW2_ACT_IRQ10 (2 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 10 */ +# define PIC2_OCW2_ACT_IRQ11 (3 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 11 */ +# define PIC2_OCW2_ACT_IRQ12 (4 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 12 */ +# define PIC2_OCW2_ACT_IRQ13 (5 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 13 */ +# define PIC2_OCW2_ACT_IRQ14 (6 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 14 */ +# define PIC2_OCW2_ACT_IRQ15 (7 << PIC_OCW2_ACT_SHIFT) /* Act on IRQ 15 */ + +# define PIC_OCW2_EOI_SHIFT (5) +# define PIC_OCW2_EOI_MASK (7 << PIC_OCW2_EOI_SHIFT) +# define PIC_OCW2_EOI_AUTO (0 << PIC_OCW2_EOI_SHIFT) /* Rotate in Auto EOI Mode (Clear) */ +# define PIC_OCW2_EOI_NONSPEC (1 << PIC_OCW2_EOI_SHIFT) /* Non Specific EOI */ +# define PIC_OCW2_EOI_SPEC (3 << PIC_OCW2_EOI_SHIFT) /* Specific EOI */ +# define PIC_OCW2_EOI_RAUTO (4 << PIC_OCW2_EOI_SHIFT) /* Rotate in Auto EOI Mode (Set) */ +# define PIC_OCW2_EOI_RNSPEC (5 << PIC_OCW2_EOI_SHIFT) /* Rotate on Non-Specific EOI */ +# define PIC_OCW2_EOI_PRIO (6 << PIC_OCW2_EOI_SHIFT) /* Set Priority Command (Use Bits 2:0) */ +# define PIC_OCW2_EOI_RSPEC (7 << PIC_OCW2_EOI_SHIFT) /* Rotate on Specific EOI (Use Bits 2:0) */ + +/* Operation Control Word 3. Bits 0 and 1 bitsenable us to read the status + * of the Interrupt Request Register (IRR) and the In-Service Register (ISR). + * This is done by setting the appropriate bits correctly and reading the + * register at the Base Address. + * + * For example if we wanted to read the In-Service Register (ISR), then we + * would set both bits 1 and 0 to 1. The next read to the base register, + * (0x20 for PIC1 or 0xa0 for PIC2) will return the status of the In-Service + * Register. + */ + +#define PIC1_OCW3 0x20 +#define PIC2_OCW3 0xa0 + +# define PIC_OCW3_PCMD_SHIFT (0) /* Poll command */ +# define PIC_OCW3_PCMD_MASK (3 << PIC_OCW3_PCMD_SHIFT) +# define PIC_OCW3_PCMD_IRR (2 << PIC_OCW3_PCMD_SHIFT) /* Next Read Returns Interrupt Request Register */ +# define PIC_OCW3_PCMD_ISR (3 << PIC_OCW3_PCMD_SHIFT) /* Next Read Returns In-Service Register */ +# define PIC_OCW3_POLLCMD (1 << 2) /* Poll command */ +# define PIC_OCW3_ONE (1 << 3) /* Must be set to 1 */ +# define PIC_OCW3_SM_SHIFT (5) +# define PIC_OCW3_SM_MASK (3 << PIC_OCW3_SM_SHIFT) +# define PIC_OCW3_RSM (2 << PIC_OCW3_SM_SHIFT) /* Reset Special Mask */ +# define PIC_OCW3_SSM (3 << PIC_OCW3_SM_SHIFT) /* Set Special Mask */ + +/* If the PIC has been reset, it must be initialized with 2 to 4 Initialization + * Command Words (ICW) before it will accept and process Interrupt Requests. The + * following outlines the four possible Initialization Command Words. + */ + +#define PIC1_ICW1 0x20 +#define PIC2_ICW1 0xa0 + +# define PIC_ICW1_ICW4 (1 << 0) /* Will be Sending ICW4 (no ICW4) */ +# define PIC_ICW1_SINGLE (1 << 1) /* Single PIC (vs. Cascaded pics) */ +# define PIC_ICW1_INTERVAL (1 << 2) /* Call Address Interval of 4 (vs 8) */ +# define PIC_ICW1_LEVEL (1 << 3) /* Level Triggered Interrupts (vs Edge) */ +# define PIC_ICW1_ICW1 (1 << 4) /* Must be set to 1 for ICW1 */ +# define PIC_ICW1_VEC_SHIFT (5) /* Interrupt Vector Addresses for MCS-80/85 Mode */ +# define PIC_ICW1_VEC_MASK (7 << PIC_ICW1_VEC_SHIFT) + +/* Initialization Command Word 2 (ICW2) selects which vector information is + * released onto the bus, during the 2nd INTA Pulse. Using the 8086 mode, + * only bits 7:3 need to be used. This will be 00001000 (0x08) for PIC1 and + * 01110000 (0x70) for PIC2. If you wish to relocate the IRQ Vector Table, + * then you can use this register. + */ + +#define PIC1_ICW2 0x21 +#define PIC2_ICW2 0xa1 + +/* There are two different Initialization Command Word 3's. One is used, if + * the PIC is a master, while the other is used for slaves. + */ + +#define PIC1_ICW3 0x21 +#define PIC2_ICW3 0xa1 + +/* Master ICW3 */ + +# define PIC1_ICW3_IRQ0 (1 << 0) /* IRQ0 is connected to a Slave */ +# define PIC1_ICW3_IRQ1 (1 << 1) /* IRQ1 is connected to a Slave */ +# define PIC1_ICW3_IRQ2 (1 << 2) /* IRQ2 is connected to a Slave */ +# define PIC1_ICW3_IRQ3 (1 << 3) /* IRQ3 is connected to a Slave */ +# define PIC1_ICW3_IRQ4 (1 << 4) /* IRQ4 is connected to a Slave */ +# define PIC1_ICW3_IRQ5 (1 << 5) /* IRQ5 is connected to a Slave */ +# define PIC1_ICW3_IRQ6 (1 << 6) /* IRQ6 is connected to a Slave */ +# define PIC1_ICW3_IRQ7 (1 << 7) /* IRQ7 is connected to a Slave */ + +/* And for the slave device, the ICW3 below is used. */ + +# define PIC_ICW3_SID_MASK (0) /* Slave ID */ +# define PIC_ICW3_SID_SHIFT (7 << PIC_ICW3_SID_MASK) +# define PIC_ICW3_SID0 (0 << PIC_ICW3_SID_MASK) /* Slave 0 */ +# define PIC_ICW3_SID1 (1 << PIC_ICW3_SID_MASK) /* Slave 1 */ +# define PIC_ICW3_SID2 (2 << PIC_ICW3_SID_MASK) /* Slave 2 */ +# define PIC_ICW3_SID3 (3 << PIC_ICW3_SID_MASK) /* Slave 3 */ +# define PIC_ICW3_SID4 (4 << PIC_ICW3_SID_MASK) /* Slave 4 */ +# define PIC_ICW3_SID5 (5 << PIC_ICW3_SID_MASK) /* Slave 5 */ +# define PIC_ICW3_SID6 (6 << PIC_ICW3_SID_MASK) /* Slave 6 */ +# define PIC_ICW3_SID7 (7 << PIC_ICW3_SID_MASK) /* Slave 7 */ + +#define PIC1_ICW4 0x21 +#define PIC2_ICW4 0xa1 + +# define PIC_ICW4_FNM (1 << 4) /* Special Fully Nested Mode */ +# define PIC_ICW4_BMODE_SHIFT (2) /* Bufferd mode */ +# define PIC_ICW4_BMODE_MASK (3 << PIC_ICW4_BMODE_SHIFT) +# define PIC_ICW4_BMODE_NON (0 << PIC_ICW4_BMODE_SHIFT) /* Non - Buffered Mode */ +# define PIC_ICW4_BMODE_SLAVE (2 << PIC_ICW4_BMODE_SHIFT) /* Buffered Mode - Slave */ +# define PIC_ICW4_BMODE_MSTR (3 << PIC_ICW4_BMODE_SHIFT) /* Buffered Mode - Master */ +# define PIC_ICW4_AEOI (1 << 1) /* Auto EOI */ +# define PIC_ICW4_808xMODE (1 << 0) /* 8086/8080 Mode (vs MCS-80/85) */ + +/* Interrupt Mask Register */ + +#define PIC1_IMR 0x21 +#define PIC2_IMR 0xa1 + +# define PIC1_IMR_IRQ0 (1 << 0) /* IRQ0 System Timer */ +# define PIC1_IMR_IRQ1 (1 << 1) /* IRQ1 Keyboard */ +# define PIC1_IMR_IRQ2 (1 << 2) /* IRQ2 PIC2 */ +# define PIC1_IMR_IRQ3 (1 << 3) /* IRQ3 Serial Port */ +# define PIC1_IMR_IRQ4 (1 << 4) /* IRQ4 Serial Port */ +# define PIC1_IMR_IRQ5 (1 << 5) /* IRQ5 Reserved/Sound Card */ +# define PIC1_IMR_IRQ6 (1 << 6) /* IRQ6 Floppy Disk Controller */ +# define PIC1_IMR_IRQ7 (1 << 7) /* IRQ7 Parallel Port */ +# define PIC1_IMR_ALL 0xff + +# define PIC2_IMR_IRQ8 (1 << 0) /* IRQ8 Real Time Clock */ +# define PIC2_IMR_IRQ9 (1 << 1) /* IRQ9 Redirected IRQ2 */ +# define PIC2_IMR_IRQ10 (1 << 2) /* IRQ10 Reserved */ +# define PIC2_IMR_IRQ11 (1 << 3) /* IRQ11 Reserved */ +# define PIC2_IMR_IRQ12 (1 << 4) /* IRQ12 PS/2 Mouse */ +# define PIC2_IMR_IRQ13 (1 << 5) /* IRQ13 Maths Co-Processor */ +# define PIC2_IMR_IRQ14 (1 << 6) /* IRQ14 Hard Disk Drive */ +# define PIC2_IMR_IRQ15 (1 << 7) /* IRQ15 Reserved */ +# define PIC2_IMR_ALL 0xff + +/* Programmable Interrupt Timer Definitions */ + +#define PIT_REG_COUNTER0 0x40 +#define PIT_REG_COUNTER1 0x41 +#define PIT_REG_COUNTER2 0x42 +#define PIT_REG_COMMAND 0x43 + +/* PIT command bit defintions */ + +# define PIT_OCW_BINCOUNT_BCD (1 << 0) /* vs binary */ +# define PIT_OCW_MODE_SHIFT (1) +# define PIT_OCW_MODE_MASK (7 << PIT_OCW_MODE_SHIFT) +# define PIT_OCW_MODE_TMCNT (0 << PIT_OCW_MODE_SHIFT) /* Terminal count */ +# define PIT_OCW_MODE_ONESHOT (1 << PIT_OCW_MODE_SHIFT) /* One shot */ +# define PIT_OCW_MODE_RATEGEN (2 << PIT_OCW_MODE_SHIFT) /* Rate gen */ +# define PIT_OCW_MODE_SQUARE (3 << PIT_OCW_MODE_SHIFT) /* Square wave generation */ +# define PIT_OCW_MODE_SWTRIG (4 << PIT_OCW_MODE_SHIFT) /* Software trigger */ +# define PIT_OCW_MODE_HWTRIG (5 << PIT_OCW_MODE_SHIFT) /* Hardware trigger */ +# define PIT_OCW_RL_SHIFT (4) +# define PIT_OCW_RL_MASK (3 << PIT_OCW_RL_SHIFT) +# define PIT_OCW_RL_LATCH (0 << PIT_OCW_RL_SHIFT) +# define PIT_OCW_RL_LSBONLY (1 << PIT_OCW_RL_SHIFT) +# define PIT_OCW_RL_MSBONLY (2 << PIT_OCW_RL_SHIFT) +# define PIT_OCW_RL_DATA (3 << PIT_OCW_RL_SHIFT) +# define PIT_OCW_COUNTER_SHIFT (6) +# define PIT_OCW_COUNTER_MASK (3 << PIT_OCW_COUNTER_SHIFT) +# define PIT_OCW_COUNTER_0 (0 << PIT_OCW_COUNTER_SHIFT) +# define PIT_OCW_COUNTER_1 (1 << PIT_OCW_COUNTER_SHIFT) +# define PIT_OCW_COUNTER_2 (2 << PIT_OCW_COUNTER_SHIFT) + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/* GDT data structures ****************************************************** + * + * The Global Descriptor Table or GDT is a data structure used by Intel x86- + * family processors starting with the 80286 in order to define the + * characteristics of the various memory areas used during program execution, + * for example the base address, the size and access privileges like + * executability and writability. These memory areas are called segments in + * Intel terminology. + */ + +/* This structure defines one segment */ + +struct gdt_entry_s +{ + uint16_t lowlimit; /* The lower 16 bits of the limit */ + uint16_t lowbase; /* The lower 16 bits of the base */ + uint8_t midbase; /* The next 8 bits of the base */ + uint8_t access; /* Access flags, determine ring segment can be used in */ + uint8_t granularity; + uint8_t hibase; /* The last 8 bits of the base */ +} __attribute__((packed)); + +/* This structure refers to the array of GDT entries, and is in the format + * required by the lgdt instruction. + */ + +struct gdt_ptr_s +{ + uint16_t limit; /* The upper 16 bits of all selector limits */ + uint32_t base; /* The address of the first GDT entry */ +} __attribute__((packed)); + +/* IDT data structures ****************************************************** + * + * The Interrupt Descriptor Table (IDT) is a data structure used by the x86 + * architecture to implement an interrupt vector table. The IDT is used by the + * processor to determine the correct response to interrupts and exceptions. + */ + +struct idt_entry_s +{ + uint16_t lobase; /* Lower 16-bits of vector address for interrupt */ + uint16_t sel; /* Kernel segment selector */ + uint8_t zero; /* This must always be zero */ + uint8_t flags; /* (See documentation) */ + uint16_t hibase; /* Upper 16-bits of vector address for interrupt */ +} __attribute__((packed)); + +/* A struct describing a pointer to an array of interrupt handlers. This is + * in a format suitable for giving to 'lidt'. + */ + +struct idt_ptr_s +{ + uint16_t limit; + uint32_t base; /* The address of the first GDT entry */ +} __attribute__((packed)); + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* Return stack pointer */ + +static inline uint32_t up_getsp() +{ + uint32_t regval; + + asm volatile( + "\tmovl %%esp, %0\n" + : "=rm" (regval) + : + : "memory"); + return regval; +} + +/* Get segment registers */ + +static inline uint32_t up_getds() +{ + uint32_t regval; + + asm volatile( + "\tmov %%ds, %0\n" + : "=rm" (regval) + : + : "memory"); + return regval; +} + +static inline uint32_t up_getcs() +{ + uint32_t regval; + + asm volatile( + "\tmov %%cs, %0\n" + : "=rm" (regval) + : + : "memory"); + return regval; +} + +static inline uint32_t up_getss() +{ + uint32_t regval; + + asm volatile( + "\tmov %%ss, %0\n" + : "=rm" (regval) + : + : "memory"); + return regval; +} + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +EXTERN void gdt_flush(uint32_t gdt_addr); +EXTERN void idt_flush(uint32_t idt_addr); + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ASSEMBLY__ */ +#endif /* __ARCH_X86_INCLUDE_I486_ARCH_H */ + diff --git a/nuttx/arch/x86/include/i486/io.h b/nuttx/arch/x86/include/i486/io.h new file mode 100644 index 000000000..ce3c37ecb --- /dev/null +++ b/nuttx/arch/x86/include/i486/io.h @@ -0,0 +1,148 @@ +/**************************************************************************** + * arch/x86/include/i486/io.h + * arch/chip/io.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, only indirectly + * through arch/io.h + */ + +#ifndef __ARCH_X86_INCLUDE_I486_IO_H +#define __ARCH_X86_INCLUDE_I486_IO_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <stdint.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + + #ifndef __ASSEMBLY__ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/* Standard x86 Port I/O */ + +static inline void outb(uint8_t regval, uint16_t port) +{ + asm volatile( + "\toutb %0,%1\n" + : + : "a" (regval), "dN" (port) + ); +} + +static inline uint8_t inb(uint16_t port) +{ + uint8_t regval; + asm volatile( + "\tinb %1,%0\n" + : "=a" (regval) + : "dN" (port) + ); + return regval; +} + +static inline void outw(uint16_t regval, uint16_t port) +{ + asm volatile( + "\toutw %0,%1\n" + : + : "a" (regval), "dN" (port) + ); +} + +static inline uint16_t inw(uint16_t port) +{ + uint16_t regval; + + asm volatile( + "\tinw %1,%0\n" + : "=a" (regval) + : "dN" (port) + ); + return regval; +} + +static inline void outl(uint32_t regval, uint16_t port) +{ + asm volatile( + "\toutl %0,%1\n" + : + : "a" (regval), "dN" (port) + ); +} + +static inline uint32_t inl(uint16_t port) +{ + uint32_t regval; + asm volatile( + "\tinl %1,%0\n" + : "=a" (regval) + : "dN" (port) + ); + return regval; +} + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ASSEMBLY__ */ +#endif /* __ARCH_X86_INCLUDE_I486_IO_H */ diff --git a/nuttx/arch/x86/include/i486/irq.h b/nuttx/arch/x86/include/i486/irq.h new file mode 100755 index 000000000..bca34b3ba --- /dev/null +++ b/nuttx/arch/x86/include/i486/irq.h @@ -0,0 +1,287 @@ +/**************************************************************************** + * arch/x86/include/i486/irq.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, only indirectly + * through nuttx/irq.h + */ + +#ifndef __ARCH_X86_INCLUDE_I486_IRQ_H +#define __ARCH_X86_INCLUDE_I486_IRQ_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +# include <stdint.h> +# include <stdbool.h> +# include <arch/arch.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* ISR and IRQ numbers */ + +#define ISR0 0 /* Division by zero exception */ +#define ISR1 1 /* Debug exception */ +#define ISR2 2 /* Non maskable interrupt */ +#define ISR3 3 /* Breakpoint exception */ +#define ISR4 4 /* 'Into detected overflow' */ +#define ISR5 5 /* Out of bounds exception */ +#define ISR6 6 /* Invalid opcode exception */ +#define ISR7 7 /* No coprocessor exception */ +#define ISR8 8 /* Double fault (pushes an error code) */ +#define ISR9 9 /* Coprocessor segment overrun */ +#define ISR10 10 /* Bad TSS (pushes an error code) */ +#define ISR11 11 /* Segment not present (pushes an error code) */ +#define ISR12 12 /* Stack fault (pushes an error code) */ +#define ISR13 13 /* General protection fault (pushes an error code) */ +#define ISR14 14 /* Page fault (pushes an error code) */ +#define ISR15 15 /* Unknown interrupt exception */ +#define ISR16 16 /* Coprocessor fault */ +#define ISR17 17 /* Alignment check exception */ +#define ISR18 18 /* Machine check exception */ +#define ISR19 19 /* Reserved */ +#define ISR20 20 /* Reserved */ +#define ISR21 21 /* Reserved */ +#define ISR22 22 /* Reserved */ +#define ISR23 23 /* Reserved */ +#define ISR24 24 /* Reserved */ +#define ISR25 25 /* Reserved */ +#define ISR26 26 /* Reserved */ +#define ISR27 27 /* Reserved */ +#define ISR28 28 /* Reserved */ +#define ISR29 29 /* Reserved */ +#define ISR30 30 /* Reserved */ +#define ISR31 31 /* Reserved */ + +#define IRQ0 32 /* System timer (cannot be changed) */ +#define IRQ1 33 /* Keyboard controller (cannot be changed) */ +#define IRQ2 34 /* Cascaded signals from IRQs 8–15 */ +#define IRQ3 35 /* Serial port controller for COM2/4 */ +#define IRQ4 36 /* serial port controller for COM1/3 */ +#define IRQ5 37 /* LPT port 2 or sound card */ +#define IRQ6 38 /* Floppy disk controller */ +#define IRQ7 39 /* LPT port 1 or sound card */ +#define IRQ8 40 /* Real time clock (RTC) */ +#define IRQ9 41 /* Open interrupt/available or SCSI host adapter */ +#define IRQ10 42 /* Open interrupt/available or SCSI or NIC */ +#define IRQ11 43 /* Open interrupt/available or SCSI or NIC */ +#define IRQ12 44 /* Mouse on PS/2 connector */ +#define IRQ13 45 /* Math coprocessor */ +#define IRQ14 46 /* Primary ATA channel */ +#define IRQ15 47 /* Secondary ATA channel */ + +#define NR_IRQS 48 + +/* Common register save structgure created by up_saveusercontext() and by + * ISR/IRQ interrupt processing. + */ + +#define REG_DS (0) /* Data segment selector */ +#define REG_EDI (1) /* Saved by pusha */ +#define REG_ESI (2) /* " " "" " " */ +#define REG_EBP (3) /* " " "" " " */ +#define REG_ESP (4) /* " " "" " " (NOTE 1)*/ +#define REG_EBX (5) /* " " "" " " */ +#define REG_EDX (6) /* " " "" " " */ +#define REG_ECX (7) /* " " "" " " */ +#define REG_EAX (8) /* " " "" " " */ +#define REG_IRQNO (9) /* Interrupt number (NOTE 2) */ +#define REG_ERRCODE (10) /* Error code (NOTE 2) */ +#define REG_EIP (11) /* Pushed by process on interrupt processing */ +#define REG_CS (12) /* " " "" " " "" " " " " */ +#define REG_EFLAGS (13) /* " " "" " " "" " " " " */ +#define REG_SP (14) /* " " "" " " "" " " " " */ +#define REG_SS (15) /* " " "" " " "" " " " " */ + +/* NOTE 1: Two versions of the ESP are saved: One from the interrupt + * processing and one from pusha. Only the interrupt ESP (REG_SP) is used. + * NOTE 2: This is not really state data. Rather, this is just a convenient + * way to pass parameters from the interrupt handler to C cod. + */ + +#define XCPTCONTEXT_REGS (16) +#define XCPTCONTEXT_SIZE (4 * XCPTCONTEXT_REGS) + +/* Some special landmarks in the stack frame: + * + * TOP_PUSHA - The offset (in 32-bit words) from the beginning of the + * save area on the stack to the value that should be in REG_ESP. + * BOTTOM_PUSHA - The offset (in 32-bit words) from the stack position before + * the interrupt occurred to the value that should be in REG_ESP. + * save area on the stack to the value that should be in REG_ESP. + * OFFSET_PRIO - The offset from the value of REG_ESP to the value of the + * stack pointer before the interrupt occurred (assuming that a priority + * change occurred. + * OFFSET_PRIO - The offset from the value of REG_ESP to the value of the + * stack pointer before the interrupt occurred (assuming that NO priority + * change occurred. + */ + +#define TOP_PUSHA REG_IRQNO +#define BOTTOM_PRIO (XCPTCONTEXT_REGS-REG_IRQNO) +#define BOTTOM_NOPRIO (REG_SP-REG_IRQNO) + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/* This struct defines the way the registers are stored */ + +#ifndef __ASSEMBLY__ +struct xcptcontext +{ + /* The following function pointer is non-zero if there are pending signals + * to be processed. + */ + +#ifndef CONFIG_DISABLE_SIGNALS + void *sigdeliver; /* Actual type is sig_deliver_t */ + + /* These are saved copies of instruction pointer and EFLAGS used during + * signal processing. + */ + + uint32_t saved_eip; + uint32_t saved_eflags; +#endif + + /* Register save area */ + + uint32_t regs[XCPTCONTEXT_REGS]; +}; +#endif + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* Get the current FLAGS register contents */ + +static inline irqstate_t irqflags() +{ + irqstate_t flags; + + asm volatile( + "\tpushf\n" + "\tpop %0\n" + : "=rm" (flags) + : + : "memory"); + return flags; +} + +/* Get a sample of the FLAGS register, determine if interrupts are disabled. + * If the X86_FLAGS_IF is cleared by cli, then interrupts are disabled. If + * if the X86_FLAGS_IF is set by sti, then interrupts are enable. + */ + +static inline bool irqdisabled(irqstate_t flags) +{ + return ((flags & X86_FLAGS_IF) == 0); +} + +static inline bool irqenabled(irqstate_t flags) +{ + return ((flags & X86_FLAGS_IF) != 0); +} + +/* Disable interrupts unconditionally */ + +static inline void irqdisable(void) +{ + asm volatile("cli": : :"memory"); +} + +/* Enable interrupts unconditionally */ + +static inline void irqenable(void) +{ + asm volatile("sti": : :"memory"); +} + +/* Disable interrupts, but return previous interrupt state */ + +static inline irqstate_t irqsave(void) +{ + irqstate_t flags = irqflags(); + irqdisable(); + return flags; +} + +/* Conditionally disable interrupts */ + +static inline void irqrestore(irqstate_t flags) +{ + if (irqenabled(flags)) + { + irqenable(); + } +} + +static inline void system_call3(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3) +{ + /* To be provided */ +} + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ASSEMBLY__ */ +#endif /* __ARCH_X86_INCLUDE_I486_IRQ_H */ + diff --git a/nuttx/arch/x86/include/i486/limits.h b/nuttx/arch/x86/include/i486/limits.h new file mode 100755 index 000000000..ac0755ef9 --- /dev/null +++ b/nuttx/arch/x86/include/i486/limits.h @@ -0,0 +1,81 @@ +/**************************************************************************** + * arch/x86/include/i486/limits.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +#ifndef __ARCH_X86_INCLUDE_I486_LIMITS_H +#define __ARCH_X86_INCLUDE_I486_LIMITS_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#define CHAR_BIT 8 +#define SCHAR_MIN 0x80 +#define SCHAR_MAX 0x7f +#define UCHAR_MAX 0xff + +/* These could be different on machines where char is unsigned */ + +#define CHAR_MIN SCHAR_MIN +#define CHAR_MAX SCHAR_MAX + +#define SHRT_MIN 0x8000 +#define SHRT_MAX 0x7fff +#define USHRT_MAX 0xffff + +#define INT_MIN 0x80000000 +#define INT_MAX 0x7fffffff +#define UINT_MAX 0xffffffff + +/* These change on 32-bit and 64-bit platforms */ + +#define LONG_MAX 0x80000000 +#define LONG_MIN 0x7fffffff +#define ULONG_MAX 0xffffffff + +#define LLONG_MAX 0x8000000000000000 +#define LLONG_MIN 0x7fffffffffffffff +#define ULLONG_MAX 0xffffffffffffffff + +/* A pointer is 4 bytes */ + +#define PTR_MIN 0x80000000 +#define PTR_MAX 0x7fffffff +#define UPTR_MAX 0xffffffff + +#endif /* __ARCH_X86_INCLUDE_I486_LIMITS_H */ diff --git a/nuttx/arch/x86/include/i486/syscall.h b/nuttx/arch/x86/include/i486/syscall.h new file mode 100644 index 000000000..7ca5f81ea --- /dev/null +++ b/nuttx/arch/x86/include/i486/syscall.h @@ -0,0 +1,138 @@ +/**************************************************************************** + * arch/x86/include/i486/syscall.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, only indirectly + * through include/syscall.h or include/sys/sycall.h + */ + +#ifndef __ARCH_X86_INCLUDE_I486_SYSCALL_H +#define __ARCH_X86_INCLUDE_I486_SYSCALL_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <stdint.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +#define SYS_syscall 0x80 + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +/* SWI with SYS_ call number and six parameters */ + +EXTERN uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4, uintptr_t parm5, + uintptr_t parm6); + +/* SWI with SYS_ call number and no parameters */ + +static inline uintptr_t sys_call0(unsigned int nbr) +{ + return sys_call6(nbr, 0, 0, 0, 0, 0, 0); +} + +/* SWI with SYS_ call number and one parameter */ + +static inline uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1) +{ + return sys_call6(nbr, parm1, 0, 0, 0, 0, 0); +} + +/* SWI with SYS_ call number and two parameters */ + +static inline uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2) +{ + return sys_call6(nbr, parm1, parm2, 0, 0, 0, 0); +} + +/* SWI with SYS_ call number and three parameters */ + +static inline uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3) +{ + return sys_call6(nbr, parm1, parm2, parm3, 0, 0, 0); +} + +/* SWI with SYS_ call number and four parameters */ + +static inline uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4) +{ + return sys_call6(nbr, parm1, parm2, parm3, parm4, 0, 0); +} + +/* SWI with SYS_ call number and five parameters */ + +static inline uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4, uintptr_t parm5) +{ + return sys_call6(nbr, parm1, parm2, parm3, parm4, parm5, 0); +} + +#undef EXTERN +#ifdef __cplusplus +} +#endif +#endif + +#endif /* __ARCH_X86_INCLUDE_I486_SYSCALL_H */ + diff --git a/nuttx/arch/x86/include/i486/types.h b/nuttx/arch/x86/include/i486/types.h new file mode 100755 index 000000000..d6f25f3e0 --- /dev/null +++ b/nuttx/arch/x86/include/i486/types.h @@ -0,0 +1,97 @@ +/************************************************************************ + * arch/x86/include/i486/types.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************/ + +/* This file should never be included directed but, rather, only + * indirectly through arch/types.h (which is, in turn only accessed + * through sys/types.h or stdint.h). + */ + +#ifndef __ARCH_X86_INCLUDE_I486_TYPES_H +#define __ARCH_X86_INCLUDE_I486_TYPES_H + +/************************************************************************ + * Included Files + ************************************************************************/ + +/************************************************************************ + * Definitions + ************************************************************************/ + +/************************************************************************ + * Type Declarations + ************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* These are the sizes of the standard integer types. NOTE that these type + * names have a leading underscore character. This file will be included + * (indirectly) by include/stdint.h and typedef'ed to the final name without + * the underscore character. This roundabout way of doings things allows + * the stdint.h to be removed from the include/ directory in the event that + * the user prefers to use the definitions provided by their toolchain header + * files + */ + +typedef signed char _int8_t; +typedef unsigned char _uint8_t; + +typedef signed short _int16_t; +typedef unsigned short _uint16_t; + +typedef signed int _int32_t; +typedef unsigned int _uint32_t; + +typedef signed long long _int64_t; +typedef unsigned long long _uint64_t; +#define __INT64_DEFINED + +/* A pointer is 4 bytes */ + +typedef signed int _intptr_t; +typedef unsigned int _uintptr_t; + +/* This is the size of the interrupt state save returned by + * irqsave() + */ + +typedef unsigned int irqstate_t; + +#endif /* __ASSEMBLY__ */ + +/************************************************************************ + * Global Function Prototypes + ************************************************************************/ + +#endif /* __ARCH_X86_INCLUDE_I486_TYPES_H */ diff --git a/nuttx/arch/x86/include/io.h b/nuttx/arch/x86/include/io.h new file mode 100755 index 000000000..4f88932c5 --- /dev/null +++ b/nuttx/arch/x86/include/io.h @@ -0,0 +1,86 @@ +/**************************************************************************** + * arch/x86/include/io.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +#ifndef __ARCH_X86_INCLUDE_IO_H +#define __ARCH_X86_INCLUDE_IO_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/* Include architecture-specific IO definitions (These are probably common + * across all architectures, but this gives a little bit of flexibility). + */ + +#ifdef CONFIG_ARCH_I486 +# include <arch/i486/io.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif +#endif + +#endif /* __ARCH_X86_INCLUDE_IO_H */ + diff --git a/nuttx/arch/x86/include/irq.h b/nuttx/arch/x86/include/irq.h new file mode 100755 index 000000000..97c8c0f9c --- /dev/null +++ b/nuttx/arch/x86/include/irq.h @@ -0,0 +1,98 @@ +/**************************************************************************** + * arch/x86/include/irq.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, only indirectly + * through nuttx/irq.h + */ + +#ifndef __ARCH_X86_INCLUDE_IRQ_H +#define __ARCH_X86_INCLUDE_IRQ_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/* Include NuttX-specific IRQ definitions */ + +#include <nuttx/irq.h> + +/* Include chip-specific IRQ definitions (including IRQ numbers) */ + +#include <arch/chip/irq.h> + +/* Include architecture-specific IRQ definitions (including register save + * structure and irqsave()/irqrestore() macros). + */ + +#ifdef CONFIG_ARCH_I486 +# include <arch/i486/irq.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif +#endif + +#endif /* __ARCH_X86_INCLUDE_IRQ_H */ + diff --git a/nuttx/arch/x86/include/limits.h b/nuttx/arch/x86/include/limits.h new file mode 100755 index 000000000..729504edd --- /dev/null +++ b/nuttx/arch/x86/include/limits.h @@ -0,0 +1,53 @@ +/**************************************************************************** + * arch/x86/include/limits.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +#ifndef __ARCH_X86_INCLUDE_LIMITS_H +#define __ARCH_X86_INCLUDE_LIMITS_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/* Include architecture-specific limits */ + +#ifdef CONFIG_ARCH_I486 +# include <arch/i486/limits.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#endif /* __ARCH_X86_INCLUDE_LIMITS_H */ diff --git a/nuttx/arch/x86/include/qemu/arch.h b/nuttx/arch/x86/include/qemu/arch.h new file mode 100755 index 000000000..fc2a7278b --- /dev/null +++ b/nuttx/arch/x86/include/qemu/arch.h @@ -0,0 +1,80 @@ +/**************************************************************************** + * arch/x86/include/qemu/arch.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, + * only indirectly through nuttx/arch.h + */ + +#ifndef __ARCH_X86_INCLUDE_QEMU_ARCH_H +#define __ARCH_X86_INCLUDE_QEMU_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ARCH_X86_INCLUDE_QEMU_ARCH_H */ + diff --git a/nuttx/arch/x86/include/qemu/irq.h b/nuttx/arch/x86/include/qemu/irq.h new file mode 100755 index 000000000..23611b83c --- /dev/null +++ b/nuttx/arch/x86/include/qemu/irq.h @@ -0,0 +1,80 @@ +/**************************************************************************** + * arch/x86/include/qemu/irq.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, + * only indirectly through nuttx/irq.h + */ + +#ifndef __ARCH_X86_INCLUDE_QEMU_IRQ_H +#define __ARCH_X86_INCLUDE_QEMU_IRQ_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ARCH_X86_INCLUDE_QEMU_IRQ_H */ + diff --git a/nuttx/arch/x86/include/syscall.h b/nuttx/arch/x86/include/syscall.h new file mode 100644 index 000000000..2d3f9a8c0 --- /dev/null +++ b/nuttx/arch/x86/include/syscall.h @@ -0,0 +1,88 @@ +/**************************************************************************** + * arch/x86/include/syscall.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, only indirectly + * through include/syscall.h or include/sys/sycall.h + */ + +#ifndef __ARCH_X86_INCLUDE_SYSCALL_H +#define __ARCH_X86_INCLUDE_SYSCALL_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/* Include x86 architecture-specific syscall macros */ + +#ifdef CONFIG_ARCH_I486 +# include <arch/i486/syscall.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif +#endif + +#endif /* __ARCH_X86_INCLUDE_SYSCALL_H */ + diff --git a/nuttx/arch/x86/include/types.h b/nuttx/arch/x86/include/types.h new file mode 100755 index 000000000..112de8525 --- /dev/null +++ b/nuttx/arch/x86/include/types.h @@ -0,0 +1,65 @@ +/**************************************************************************** + * arch/x86/include/types.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, only indirectly + * through sys/types.h + */ + +#ifndef __ARCH_X86_INCLUDE_TYPES_H +#define __ARCH_X86_INCLUDE_TYPES_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/* Include architecture-specific limits */ + +#ifdef CONFIG_ARCH_I486 +# include <arch/i486/types.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Global Function Prototypes + ****************************************************************************/ + +#endif /* __ARCH_X86_INCLUDE_TYPES_H */ diff --git a/nuttx/arch/x86/src/Makefile b/nuttx/arch/x86/src/Makefile new file mode 100644 index 000000000..d7b2140c8 --- /dev/null +++ b/nuttx/arch/x86/src/Makefile @@ -0,0 +1,163 @@ +############################################################################ +# arch/x86/src/Makefile +# +# Copyright (C) 2011 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt <spudmonkey@racsa.co.cr> +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# 3. Neither the name NuttX nor the names of its contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +############################################################################ + +-include $(TOPDIR)/Make.defs +-include chip/Make.defs + +ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src +ifeq ($(CONFIG_ARCH_I486),y) +ARCH_SUBDIR = i486 +endif + +ifeq ($(WINTOOL),y) + NUTTX = "${shell cygpath -w $(TOPDIR)/nuttx}" + CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \ + -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \ + -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}" \ + -I "${shell cygpath -w $(TOPDIR)/sched}" +else + NUTTX = $(TOPDIR)/nuttx + CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common \ + -I$(ARCH_SRCDIR)/$(ARCH_SUBDIR) -I$(TOPDIR)/sched +endif + +HEAD_OBJ = $(HEAD_ASRC:.S=$(OBJEXT)) + +ASRCS = $(CHIP_ASRCS) $(CMN_ASRCS) +AOBJS = $(ASRCS:.S=$(OBJEXT)) + +CSRCS = $(CHIP_CSRCS) $(CMN_CSRCS) +COBJS = $(CSRCS:.c=$(OBJEXT)) + +SRCS = $(ASRCS) $(CSRCS) +OBJS = $(AOBJS) $(COBJS) + +LDFLAGS = $(ARCHSCRIPT) +EXTRA_LIBS = + +LINKLIBS = +ifeq ($(WINTOOL),y) + LIBPATHS = ${shell for path in $(LINKLIBS); do dir=`dirname $(TOPDIR)/$$path`;echo "-L\"`cygpath -w $$dir`\"";done} + LIBPATHS += -L"${shell cygpath -w $(BOARDDIR)}" +else + LIBPATHS = $(addprefix -L$(TOPDIR)/,$(dir $(LINKLIBS))) + LIBPATHS += -L"$(BOARDDIR)" +endif +LDLIBS = $(patsubst lib%,-l%,$(basename $(notdir $(LINKLIBS)))) + +BOARDDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src/board + +LIBGCC = "${shell $(CC) $(ARCHCPUFLAGS) -print-libgcc-file-name}" + +ifeq ($(HOSTOS),FreeBSD) + HOST_ARCH = ${shell uname -m 2>/dev/null || echo "Other"} + ifeq ($(HOST_ARCH),amd64) + LDFLAGS += -melf_i386 + LIBGCC = "/usr/lib32/libgcc.a" + endif +endif + +VPATH = chip:common:$(ARCH_SUBDIR) + +all: $(HEAD_OBJ) libarch$(LIBEXT) + +$(AOBJS) $(HEAD_OBJ): %$(OBJEXT): %.S + $(call ASSEMBLE, $<, $@) + +$(COBJS): %$(OBJEXT): %.c + $(call COMPILE, $<, $@) + +libarch$(LIBEXT): $(OBJS) + @( for obj in $(OBJS) ; do \ + $(call ARCHIVE, $@, $${obj}); \ + done ; ) + +board/libboard$(LIBEXT): + @$(MAKE) -C board TOPDIR="$(TOPDIR)" libboard$(LIBEXT) EXTRADEFINES=$(EXTRADEFINES) + +nuttx$(EXEEXT): $(HEAD_OBJ) board/libboard$(LIBEXT) + @echo "LD: nuttx$(EXEEXT)" + @$(LD) --entry=__start $(LDFLAGS) $(LIBPATHS) -o $(NUTTX)$(EXEEXT) $(HEAD_OBJ) $(EXTRA_OBJS) \ + --start-group $(LDLIBS) -lboard --end-group $(EXTRA_LIBS) $(LIBGCC) +ifeq ($(CONFIG_BOOT_RUNFROMFLASH),y) + @export flashloc=`$(OBJDUMP) --all-headers $(NUTTX)$(EXEEXT) | grep _eronly | cut -d' ' -f1`; \ + $(OBJCOPY) $(OBJCOPYARGS) --adjust-section-vma=.data=0x$$flashloc $(NUTTX)$(EXEEXT) $(NUTTX).flashimage + @mv $(NUTTX).flashimage $(NUTTX)$(EXEEXT) +endif + @$(NM) $(NUTTX)$(EXEEXT) | \ + grep -v '\(compiled\)\|\(\$(OBJEXT)$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | \ + sort > $(TOPDIR)/System.map + @export vflashstart=`$(OBJDUMP) --all-headers $(NUTTX)$(EXEEXT) | grep _vflashstart | cut -d' ' -f1`; \ + if [ ! -z "$$vflashstart" ]; then \ + $(OBJCOPY) $(OBJCOPYARGS) --adjust-section-vma=.vector=0x$$vflashstart $(NUTTX)$(EXEEXT) $(NUTTX).flashimage; \ + mv $(NUTTX).flashimage $(NUTTX)$(EXEEXT); \ + fi + +# This is part of the top-level export target + +export_head: board/libboard$(LIBEXT) $(HEAD_OBJ) + @if [ -d "$(EXPORT_DIR)/startup" ]; then \ + cp -f $(HEAD_OBJ) "$(EXPORT_DIR)/startup"; \ + else \ + echo "$(EXPORT_DIR)/startup does not exist"; \ + exit 1; \ + fi + +# Dependencies + +.depend: Makefile chip/Make.defs $(SRCS) + @if [ -e board/Makefile ]; then \ + $(MAKE) -C board TOPDIR="$(TOPDIR)" depend ; \ + fi + @$(MKDEP) --dep-path chip --dep-path common --dep-path $(ARCH_SUBDIR) \ + $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep + @touch $@ + +depend: .depend + +clean: + @if [ -e board/Makefile ]; then \ + $(MAKE) -C board TOPDIR="$(TOPDIR)" clean ; \ + fi + @rm -f libarch$(LIBEXT) *~ .*.swp + $(call CLEAN) + +distclean: clean + @if [ -e board/Makefile ]; then \ + $(MAKE) -C board TOPDIR="$(TOPDIR)" distclean ; \ + fi + @rm -f Make.dep .depend + +-include Make.dep diff --git a/nuttx/arch/x86/src/README.txt b/nuttx/arch/x86/src/README.txt new file mode 100755 index 000000000..1b0c0590b --- /dev/null +++ b/nuttx/arch/x86/src/README.txt @@ -0,0 +1,31 @@ +arch/x86/src/README.txt
+^^^^^^^^^^^^^^^^^^^^^^^
+
+This directory holds x86-specific source files. All x86 source reside in
+lower-level common, chip-specific, and architecture-specific directories.
+
+common/ Directory
+^^^^^^^^^^^^^^^^^
+
+This directory holds source files common to all x86 architectures.
+
+Architecture-Specific Directories
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Architecture-specific directories hold common source files shared for by
+implementations of specific x86 architectures.
+
+i486
+ This directory holds logic appropriate for any instantiation of the 32-bit
+ i486 architecture.
+
+Chip-Specific directories
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The same x86 architecture may be realized in different chip implementations.
+For SoC chips, in particular, on-chip devices and differing interrupt
+structures may require special, chip-specific definitions in these chip-
+specific directories.
+
+qemu
+ This is the implementation of NuttX on the QEMU x86 simulation.
diff --git a/nuttx/arch/x86/src/common/up_allocateheap.c b/nuttx/arch/x86/src/common/up_allocateheap.c new file mode 100644 index 000000000..3273d681f --- /dev/null +++ b/nuttx/arch/x86/src/common/up_allocateheap.c @@ -0,0 +1,82 @@ +/**************************************************************************** + * arch/x86/src/common/up_allocateheap.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_allocate_heap + * + * Description: + * The heap may be statically allocated by defining CONFIG_HEAP_BASE and + * CONFIG_HEAP_SIZE. If these are not defined, then this function will be + * called to dynamically set aside the heap region. + * + ****************************************************************************/ + +void up_allocate_heap(FAR void **heap_start, size_t *heap_size) +{ + up_ledon(LED_HEAPALLOCATE); + *heap_start = (FAR void*)g_heapbase; + *heap_size = CONFIG_DRAM_END - g_heapbase; +} diff --git a/nuttx/arch/x86/src/common/up_arch.h b/nuttx/arch/x86/src/common/up_arch.h new file mode 100644 index 000000000..96d49d306 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_arch.h @@ -0,0 +1,90 @@ +/**************************************************************************** + * arch/x86/src/common/up_arch.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +#ifndef ___ARCH_X86_SRC_COMMON_UP_ARCH_H +#define ___ARCH_X86_SRC_COMMON_UP_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#ifndef __ASSEMBLY__ +# include <stdint.h> +#endif +#include <arch/io.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Inline Functions + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +# define getreg8(p) inb(p) +# define putreg8(v,p) outb(v,p) +# define getreg16(p) inw(p) +# define putreg16(v,p) outw(v,p) +# define getreg32(p) inl(p) +# define putreg32(v,p) outl(v,p) + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#undef EXTERN +#if defined(__cplusplus) +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +/* Atomic modification of registers */ + +EXTERN void modifyreg8(unsigned int addr, uint8_t clearbits, uint8_t setbits); +EXTERN void modifyreg16(unsigned int addr, uint16_t clearbits, uint16_t setbits); +EXTERN void modifyreg32(unsigned int addr, uint32_t clearbits, uint32_t setbits); + +#undef EXTERN +#if defined(__cplusplus) +} +#endif + +#endif /* __ASSEMBLY__ */ +#endif /* ___ARCH_X86_SRC_COMMON_UP_ARCH_H */ diff --git a/nuttx/arch/x86/src/common/up_assert.c b/nuttx/arch/x86/src/common/up_assert.c new file mode 100644 index 000000000..776784656 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_assert.c @@ -0,0 +1,282 @@ +/**************************************************************************** + * arch/x86/src/common/up_assert.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <stdlib.h> +#include <assert.h> +#include <debug.h> + +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include <arch/arch.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Output debug info if stack dump is selected -- even if + * debug is not selected. + */ + +#ifdef CONFIG_ARCH_STACKDUMP +# undef lldbg +# define lldbg lib_lowprintf +#endif + +/* The following is just intended to keep some ugliness out of the mainline + * code. We are going to print the task name if: + * + * CONFIG_TASK_NAME_SIZE > 0 && <-- The task has a name + * (defined(CONFIG_DEBUG) || <-- And the debug is enabled (lldbg used) + * defined(CONFIG_ARCH_STACKDUMP) <-- Or lib_lowprintf() is used + */ + +#undef CONFIG_PRINT_TASKNAME +#if CONFIG_TASK_NAME_SIZE > 0 && (defined(CONFIG_DEBUG) || defined(CONFIG_ARCH_STACKDUMP)) +# define CONFIG_PRINT_TASKNAME 1 +#endif + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_stackdump + ****************************************************************************/ + +#ifdef CONFIG_ARCH_STACKDUMP +static void up_stackdump(uint32_t sp, uint32_t stack_base) +{ + uint32_t stack ; + + for (stack = sp & ~0x1f; stack < stack_base; stack += 32) + { + uint32_t *ptr = (uint32_t*)stack; + lldbg("%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n", + stack, ptr[0], ptr[1], ptr[2], ptr[3], + ptr[4], ptr[5], ptr[6], ptr[7]); + } +} +#else +# define up_stackdump() +#endif + +/**************************************************************************** + * Name: up_dumpstate + ****************************************************************************/ + +#ifdef CONFIG_ARCH_STACKDUMP +static void up_dumpstate(void) +{ + _TCB *rtcb = (_TCB*)g_readytorun.head; + uint32_t sp = up_getsp(); + uint32_t ustackbase; + uint32_t ustacksize; +#if CONFIG_ARCH_INTERRUPTSTACK > 3 + uint32_t istackbase; + uint32_t istacksize; +#endif + + /* Get the limits on the user stack memory */ + + if (rtcb->pid == 0) + { + ustackbase = g_heapbase - 4; + ustacksize = CONFIG_IDLETHREAD_STACKSIZE; + } + else + { + ustackbase = (uint32_t)rtcb->adj_stack_ptr; + ustacksize = (uint32_t)rtcb->adj_stack_size; + } + + /* Get the limits on the interrupt stack memory */ + +#if CONFIG_ARCH_INTERRUPTSTACK > 3 + istackbase = (uint32_t)&g_userstack; + istacksize = (CONFIG_ARCH_INTERRUPTSTACK & ~3) - 4; + + /* Show interrupt stack info */ + + lldbg("sp: %08x\n", sp); + lldbg("IRQ stack:\n"); + lldbg(" base: %08x\n", istackbase); + lldbg(" size: %08x\n", istacksize); + + /* Does the current stack pointer lie within the interrupt + * stack? + */ + + if (sp <= istackbase && sp > istackbase - istacksize) + { + /* Yes.. dump the interrupt stack */ + + up_stackdump(sp, istackbase); + + /* Extract the user stack pointer which should lie + * at the base of the interrupt stack. + */ + + sp = g_userstack; + lldbg("sp: %08x\n", sp); + } + + /* Show user stack info */ + + lldbg("User stack:\n"); + lldbg(" base: %08x\n", ustackbase); + lldbg(" size: %08x\n", ustacksize); +#else + lldbg("sp: %08x\n", sp); + lldbg("stack base: %08x\n", ustackbase); + lldbg("stack size: %08x\n", ustacksize); +#endif + + /* Dump the user stack if the stack pointer lies within the allocated user + * stack memory. + */ + + if (sp > ustackbase || sp <= ustackbase - ustacksize) + { +#if !defined(CONFIG_ARCH_INTERRUPTSTACK) || CONFIG_ARCH_INTERRUPTSTACK < 4 + lldbg("ERROR: Stack pointer is not within allocated stack\n"); +#endif + } + else + { + up_stackdump(sp, ustackbase); + } + + /* Then dump the registers (if available) */ + + if (current_regs != NULL) + { + up_registerdump((uint32_t*)current_regs); + } +} +#else +# define up_dumpstate() +#endif + +/**************************************************************************** + * Name: _up_assert + ****************************************************************************/ + +static void _up_assert(int errorcode) /* __attribute__ ((noreturn)) */ +{ + /* Are we in an interrupt handler or the idle task? */ + + if (current_regs || ((_TCB*)g_readytorun.head)->pid == 0) + { + (void)irqsave(); + for(;;) + { +#ifdef CONFIG_ARCH_LEDS + up_ledon(LED_PANIC); + up_mdelay(250); + up_ledoff(LED_PANIC); + up_mdelay(250); +#endif + } + } + else + { + exit(errorcode); + } +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_assert + ****************************************************************************/ + +void up_assert(const uint8_t *filename, int lineno) +{ +#ifdef CONFIG_PRINT_TASKNAME + _TCB *rtcb = (_TCB*)g_readytorun.head; +#endif + + up_ledon(LED_ASSERTION); +#ifdef CONFIG_PRINT_TASKNAME + lldbg("Assertion failed at file:%s line: %d task: %s\n", + filename, lineno, rtcb->name); +#else + lldbg("Assertion failed at file:%s line: %d\n", + filename, lineno); +#endif + up_dumpstate(); + _up_assert(EXIT_FAILURE); +} + +/**************************************************************************** + * Name: up_assert_code + ****************************************************************************/ + +void up_assert_code(const uint8_t *filename, int lineno, int errorcode) +{ +#ifdef CONFIG_PRINT_TASKNAME + _TCB *rtcb = (_TCB*)g_readytorun.head; +#endif + + up_ledon(LED_ASSERTION); + +#ifdef CONFIG_PRINT_TASKNAME + lldbg("Assertion failed at file:%s line: %d task: %s error code: %d\n", + filename, lineno, rtcb->name, errorcode); +#else + lldbg("Assertion failed at file:%s line: %d error code: %d\n", + filename, lineno, errorcode); +#endif + up_dumpstate(); + _up_assert(errorcode); +} diff --git a/nuttx/arch/x86/src/common/up_blocktask.c b/nuttx/arch/x86/src/common/up_blocktask.c new file mode 100755 index 000000000..f11931103 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_blocktask.c @@ -0,0 +1,166 @@ +/**************************************************************************** + * arch/x86/src/common/up_blocktask.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdbool.h> +#include <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_block_task + * + * Description: + * The currently executing task at the head of the ready to run list must + * be stopped. Save its context and move it to the inactive list specified + * by task_state. + * + * Inputs: + * tcb: Refers to a task in the ready-to-run list (normally the task at the + * head of the list). It most be stopped, its context saved and moved + * into one of the waiting task lists. It it was the task at the head + * of the ready-to-run list, then a context to the new ready to run task + * must be performed. + * task_state: Specifies which waiting task list should be + * hold the blocked task TCB. + * + ****************************************************************************/ + +void up_block_task(_TCB *tcb, tstate_t task_state) +{ + /* Verify that the context switch can be performed */ + + if ((tcb->task_state < FIRST_READY_TO_RUN_STATE) || + (tcb->task_state > LAST_READY_TO_RUN_STATE)) + { + PANIC(OSERR_BADBLOCKSTATE); + } + else + { + _TCB *rtcb = (_TCB*)g_readytorun.head; + bool switch_needed; + + /* Remove the tcb task from the ready-to-run list. If we + * are blocking the task at the head of the task list (the + * most likely case), then a context switch to the next + * ready-to-run task is needed. In this case, it should + * also be true that rtcb == tcb. + */ + + switch_needed = sched_removereadytorun(tcb); + + /* Add the task to the specified blocked task list */ + + sched_addblocked(tcb, (tstate_t)task_state); + + /* If there are any pending tasks, then add them to the g_readytorun + * task list now + */ + + if (g_pendingtasks.head) + { + switch_needed |= sched_mergepending(); + } + + /* Now, perform the context switch if one is needed */ + + if (switch_needed) + { + /* Are we in an interrupt handler? */ + + if (current_regs) + { + /* Yes, then we have to do things differently. + * Just copy the current_regs into the OLD rtcb. + */ + + up_savestate(rtcb->xcp.regs); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (_TCB*)g_readytorun.head; + + /* Then switch contexts */ + + up_restorestate(rtcb->xcp.regs); + } + + /* Copy the user C context into the TCB at the (old) head of the + * g_readytorun Task list. if up_saveusercontext returns a non-zero + * value, then this is really the previously running task restarting! + */ + + else if (!up_saveusercontext(rtcb->xcp.regs)) + { + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (_TCB*)g_readytorun.head; + + /* Then switch contexts */ + + up_fullcontextrestore(rtcb->xcp.regs); + } + } + } +} diff --git a/nuttx/arch/x86/src/common/up_copystate.c b/nuttx/arch/x86/src/common/up_copystate.c new file mode 100644 index 000000000..4ae842308 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_copystate.c @@ -0,0 +1,82 @@ +/**************************************************************************** + * arch/x86/src/common/up_copystate.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_undefinedinsn + ****************************************************************************/ + +/* A little faster than most memcpy's */ + +void up_copystate(uint32_t *dest, uint32_t *src) +{ + int i; + + /* In the current ARM model, the state is always copied to and from the + * stack and TCB. + */ + + for (i = 0; i < XCPTCONTEXT_REGS; i++) + { + *dest++ = *src++; + } +} + diff --git a/nuttx/arch/x86/src/common/up_exit.c b/nuttx/arch/x86/src/common/up_exit.c new file mode 100644 index 000000000..ceca72c87 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_exit.c @@ -0,0 +1,174 @@ +/**************************************************************************** + * common/up_exit.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sched.h> +#include <debug.h> +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "up_internal.h" + +#ifdef CONFIG_DUMP_ON_EXIT +#include <nuttx/fs.h> +#endif + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: _up_dumponexit + * + * Description: + * Dump the state of all tasks whenever on task exits. This is debug + * instrumentation that was added to check file-related reference counting + * but could be useful again sometime in the future. + * + ****************************************************************************/ + +#if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG) +static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg) +{ +#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0 + int i; +#endif + + sdbg(" TCB=%p name=%s pid=%d\n", tcb, tcb->argv[0], tcb->pid); + sdbg(" priority=%d state=%d\n", tcb->sched_priority, tcb->task_state); + +#if CONFIG_NFILE_DESCRIPTORS > 0 + if (tcb->filelist) + { + sdbg(" filelist refcount=%d\n", + tcb->filelist->fl_crefs); + + for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++) + { + struct inode *inode = tcb->filelist->fl_files[i].f_inode; + if (inode) + { + sdbg(" fd=%d refcount=%d\n", + i, inode->i_crefs); + } + } + } +#endif + +#if CONFIG_NFILE_STREAMS > 0 + if (tcb->streams) + { + sdbg(" streamlist refcount=%d\n", + tcb->streams->sl_crefs); + + for (i = 0; i < CONFIG_NFILE_STREAMS; i++) + { + struct file_struct *filep = &tcb->streams->sl_streams[i]; + if (filep->fs_filedes >= 0) + { +#if CONFIG_STDIO_BUFFER_SIZE > 0 + sdbg(" fd=%d nbytes=%d\n", + filep->fs_filedes, + filep->fs_bufpos - filep->fs_bufstart); +#else + sdbg(" fd=%d\n", filep->fs_filedes); +#endif + } + } + } +#endif +} +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: _exit + * + * Description: + * This function causes the currently executing task to cease to exist. + * This is a special case of task_delete() where the task to be deleted is + * the currently executing task. It is more complex because a context + * switch must be perform to the next ready to run task. + * + ****************************************************************************/ + +void _exit(int status) +{ + _TCB* tcb; + + /* Disable interrupts. They will be restored when the next + * task is started. + */ + + (void)irqsave(); + + slldbg("TCB=%p exitting\n", g_readytorun.head); + +#if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG) + slldbg("Other tasks:\n"); + sched_foreach(_up_dumponexit, NULL); +#endif + + /* Destroy the task at the head of the ready to run list. */ + + (void)task_deletecurrent(); + + /* Now, perform the context switch to the new ready-to-run task at the + * head of the list. + */ + + tcb = (_TCB*)g_readytorun.head; + + /* Then switch contexts */ + + up_fullcontextrestore(tcb->xcp.regs); +} + diff --git a/nuttx/arch/x86/src/common/up_initialize.c b/nuttx/arch/x86/src/common/up_initialize.c new file mode 100644 index 000000000..0ceeddbb6 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_initialize.c @@ -0,0 +1,168 @@ +/**************************************************************************** + * arch/x86/src/common/up_initialize.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <debug.h> + +#include <nuttx/arch.h> +#include <nuttx/fs.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_calibratedelay + * + * Description: + * Delay loops are provided for short timing loops. This function, if + * enabled, will just wait for 100 seconds. Using a stopwatch, you can + * can then determine if the timing loops are properly calibrated. + * + ****************************************************************************/ + +#if defined(CONFIG_ARCH_CALIBRATION) && defined(CONFIG_DEBUG) +static void up_calibratedelay(void) +{ + int i; + lldbg("Beginning 100s delay\n"); + for (i = 0; i < 100; i++) + { + up_mdelay(1000); + } + lldbg("End 100s delay\n"); +} +#else +# define up_calibratedelay() +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_initialize + * + * Description: + * up_initialize will be called once during OS initialization after the + * basic OS services have been initialized. The architecture specific + * details of initializing the OS will be handled here. Such things as + * setting up interrupt service routines, starting the clock, and + * registering device drivers are some of the things that are different + * for each processor and hardware platform. + * + * up_initialize is called after the OS initialized but before the user + * initialization logic has been started and before the libraries have + * been initialized. OS services and driver services are available. + * + ****************************************************************************/ + +void up_initialize(void) +{ + /* Initialize global variables */ + + current_regs = NULL; + + /* Calibrate the timing loop */ + + up_calibratedelay(); + + /* Add any extra memory fragments to the memory manager */ + + up_addregion(); + + /* Initialize the interrupt subsystem */ + + up_irqinitialize(); + + /* Initialize the DMA subsystem if the weak function up_dmainitialize has been + * brought into the build + */ + +#ifdef CONFIG_ARCH_DMA +#ifdef CONFIG_HAVE_WEAKFUNCTIONS + if (up_dmainitialize) +#endif + { + up_dmainitialize(); + } +#endif + + /* Initialize the system timer interrupt */ + +#if !defined(CONFIG_SUPPRESS_INTERRUPTS) && !defined(CONFIG_SUPPRESS_TIMER_INTS) + up_timerinit(); +#endif + + /* Register devices */ + +#if CONFIG_NFILE_DESCRIPTORS > 0 + devnull_register(); /* Standard /dev/null */ +#endif + + /* Initialize the serial device driver */ + +#ifdef CONFIG_USE_SERIALDRIVER + up_serialinit(); +#elif defined(CONFIG_DEV_LOWCONSOLE) + lowconsole_init(); +#endif + + /* Initialize the netwok */ + + up_netinitialize(); + + /* Initialize USB -- device and/or host */ + + up_usbinitialize(); + up_ledon(LED_IRQSENABLED); +} diff --git a/nuttx/arch/x86/src/common/up_internal.h b/nuttx/arch/x86/src/common/up_internal.h new file mode 100644 index 000000000..185d0afc0 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_internal.h @@ -0,0 +1,237 @@ +/**************************************************************************** + * arch/x86/src/common/up_internal.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +#ifndef __ARCH_X86_SRC_COMMON_UP_INTERNAL_H +#define __ARCH_X86_SRC_COMMON_UP_INTERNAL_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +# include <stdint.h> +#endif + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Bring-up debug configurations. These are here (vs defconfig) because + * these should only be controlled during low level board bring-up and not + * part of normal platform configuration. + */ + +#undef CONFIG_SUPPRESS_INTERRUPTS /* DEFINED: Do not enable interrupts */ +#undef CONFIG_SUPPRESS_TIMER_INTS /* DEFINED: No timer */ +#undef CONFIG_SUPPRESS_SERIAL_INTS /* DEFINED: Console will poll */ +#undef CONFIG_SUPPRESS_UART_CONFIG /* DEFINED: Do not reconfig UART */ +#undef CONFIG_DUMP_ON_EXIT /* DEFINED: Dump task state on exit */ + +/* Determine which (if any) console driver to use */ + +#if CONFIG_NFILE_DESCRIPTORS == 0 || defined(CONFIG_DEV_LOWCONSOLE) +# undef CONFIG_USE_SERIALDRIVER +# undef CONFIG_USE_EARLYSERIALINIT +#elif defined(CONFIG_DEV_CONSOLE) && CONFIG_NFILE_DESCRIPTORS > 0 +# define CONFIG_USE_SERIALDRIVER 1 +# define CONFIG_USE_EARLYSERIALINIT 1 +#endif + +/* Check if an interrupt stack size is configured */ + +#ifndef CONFIG_ARCH_INTERRUPTSTACK +# define CONFIG_ARCH_INTERRUPTSTACK 0 +#endif + +/* Macros to handle saving and restore interrupt state. In the current + * model, the state is copied from the stack to the TCB, but only a + * referenced is passed to get the state from the TCB. + */ + +#define up_restorestate(regs) (current_regs = regs) + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +typedef void (*up_vector_t)(void); +#endif + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +/* This holds a references to the current interrupt level register storage + * structure. If is non-NULL only during interrupt processing. + */ + +extern volatile uint32_t *current_regs; + +/* This is the beginning of heap as provided from up_head.S. This is the first + * address in DRAM after the loaded program+bss+idle stack. The end of the + * heap is CONFIG_DRAM_END + */ + +extern uint32_t g_heapbase; + +/* Address of the saved user stack pointer */ + +#if CONFIG_ARCH_INTERRUPTSTACK > 3 +extern uint32_t g_userstack; +#endif + +/* These 'addresses' of these values are setup by the linker script. They are + * not actual uint32_t storage locations! They are only used meaningfully in the + * following way: + * + * - The linker script defines, for example, the symbol_sdata. + * - The declareion extern uint32_t _sdata; makes C happy. C will believe + * that the value _sdata is the address of a uint32_t variable _data (it is + * not!). + * - We can recoved the linker value then by simply taking the address of + * of _data. like: uint32_t *pdata = &_sdata; + */ + +extern uint32_t _stext; /* Start of .text */ +extern uint32_t _etext; /* End_1 of .text + .rodata */ +extern const uint32_t _eronly; /* End+1 of read only section (.text + .rodata) */ +extern uint32_t _sdata; /* Start of .data */ +extern uint32_t _edata; /* End+1 of .data */ +extern uint32_t _sbss; /* Start of .bss */ +extern uint32_t _ebss; /* End+1 of .bss */ +#endif + +/**************************************************************************** + * Inline Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* Defined in files with the same name as the function */ + +extern void up_boot(void); +extern void up_copystate(uint32_t *dest, uint32_t *src); +extern void up_savestate(uint32_t *regs); +extern void up_decodeirq(uint32_t *regs); +extern void up_irqinitialize(void); +#ifdef CONFIG_ARCH_DMA +extern void weak_function up_dmainitialize(void); +#endif +extern int up_saveusercontext(uint32_t *saveregs); +extern void up_fullcontextrestore(uint32_t *restoreregs) __attribute__ ((noreturn)); +extern void up_switchcontext(uint32_t *saveregs, uint32_t *restoreregs); +extern void up_sigdeliver(void); +extern void up_lowputc(char ch); +extern void up_puts(const char *str); +extern void up_lowputs(const char *str); + +extern void up_syscall(uint32_t *regs); +extern void up_registerdump(uint32_t *regs); + +/* Defined in up_allocateheap.c */ + +#if CONFIG_MM_REGIONS > 1 +void up_addregion(void); +#else +# define up_addregion() +#endif + +/* Defined in up_serial.c */ + +#if CONFIG_NFILE_DESCRIPTORS > 0 +extern void up_earlyserialinit(void); +extern void up_serialinit(void); +#else +# define up_earlyserialinit() +# define up_serialinit() +#endif + +/* Defined in drivers/lowconsole.c */ + +#ifdef CONFIG_DEV_LOWCONSOLE +extern void lowconsole_init(void); +#else +# define lowconsole_init() +#endif + +/* Defined in up_watchdog.c */ + +extern void up_wdtinit(void); + +/* Defined in up_timerisr.c */ + +extern void up_timerinit(void); + +/* Defined in up_irq.c */ + +extern void up_maskack_irq(int irq); + +/* Defined in board/up_leds.c */ + +#ifdef CONFIG_ARCH_LEDS +extern void up_ledinit(void); +extern void up_ledon(int led); +extern void up_ledoff(int led); +#else +# define up_ledinit() +# define up_ledon(led) +# define up_ledoff(led) +#endif + +/* Defined in board/up_network.c */ + +#ifdef CONFIG_NET +extern void up_netinitialize(void); +#else +# define up_netinitialize() +#endif + +#ifdef CONFIG_USBDEV +extern void up_usbinitialize(void); +extern void up_usbuninitialize(void); +#else +# define up_usbinitialize() +# define up_usbuninitialize() +#endif + +#endif /* __ASSEMBLY__ */ + +#endif /* __ARCH_X86_SRC_COMMON_UP_INTERNAL_H */ diff --git a/nuttx/arch/x86/src/common/up_interruptcontext.c b/nuttx/arch/x86/src/common/up_interruptcontext.c new file mode 100644 index 000000000..6fbe67989 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_interruptcontext.c @@ -0,0 +1,72 @@ +/**************************************************************************** + * arch/x86/src/common/up_interruptcontext.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdbool.h> +#include <nuttx/arch.h> +#include <nuttx/irq.h> + +#include "up_internal.h" + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_interrupt_context + * + * Description: + * Return true is we are currently executing in the interrupt handler + * context. + * + ****************************************************************************/ + +bool up_interrupt_context(void) +{ + return current_regs != NULL; +} diff --git a/nuttx/arch/x86/src/common/up_lowputs.c b/nuttx/arch/x86/src/common/up_lowputs.c new file mode 100644 index 000000000..46c8940cc --- /dev/null +++ b/nuttx/arch/x86/src/common/up_lowputs.c @@ -0,0 +1,74 @@ +/**************************************************************************** + * arch/x86/src/common/up_lowputs.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_lowputs + * + * Description: + * This is a low-level helper function used to support debug. + * + ****************************************************************************/ + +void up_lowputs(const char *str) +{ + while(*str) + { + up_lowputc(*str++); + } +} diff --git a/nuttx/arch/x86/src/common/up_mdelay.c b/nuttx/arch/x86/src/common/up_mdelay.c new file mode 100644 index 000000000..22fc78d04 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_mdelay.c @@ -0,0 +1,90 @@ +/**************************************************************************** + * arch/x86/src/common/up_mdelay.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/arch.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_mdelay + * + * Description: + * Delay inline for the requested number of milliseconds. + * *** NOT multi-tasking friendly *** + * + * ASSUMPTIONS: + * The setting CONFIG_BOARD_LOOPSPERMSEC has been calibrated + * + ****************************************************************************/ + +void up_mdelay(unsigned int milliseconds) +{ + volatile int i; + volatile int j; + + for (i = 0; i < milliseconds; i++) + { + for (j = 0; j < CONFIG_BOARD_LOOPSPERMSEC; j++) + { + } + } +} diff --git a/nuttx/arch/x86/src/common/up_modifyreg16.c b/nuttx/arch/x86/src/common/up_modifyreg16.c new file mode 100644 index 000000000..9a7ae4507 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_modifyreg16.c @@ -0,0 +1,85 @@ +/**************************************************************************** + * arch/x86/src/common/up_modifyreg16.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <debug.h> + +#include <arch/irq.h> +#include <nuttx/arch.h> + +#include "up_arch.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: modifyreg16 + * + * Description: + * Atomically modify the specified bits in a memory mapped register + * + ****************************************************************************/ + +void modifyreg16(unsigned int addr, uint16_t clearbits, uint16_t setbits) +{ + irqstate_t flags; + uint16_t regval; + + flags = irqsave(); + regval = getreg16((uint16_t)addr); + regval &= ~clearbits; + regval |= setbits; + putreg16(regval, (uint16_t)addr); + irqrestore(flags); +} diff --git a/nuttx/arch/x86/src/common/up_modifyreg32.c b/nuttx/arch/x86/src/common/up_modifyreg32.c new file mode 100644 index 000000000..c2a400335 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_modifyreg32.c @@ -0,0 +1,85 @@ +/**************************************************************************** + * arch/x86/src/common/up_modifyreg32.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <debug.h> + +#include <arch/irq.h> +#include <nuttx/arch.h> + +#include "up_arch.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: modifyreg32 + * + * Description: + * Atomically modify the specified bits in a memory mapped register + * + ****************************************************************************/ + +void modifyreg32(unsigned int addr, uint32_t clearbits, uint32_t setbits) +{ + irqstate_t flags; + uint32_t regval; + + flags = irqsave(); + regval = getreg32((uint16_t)addr); + regval &= ~clearbits; + regval |= setbits; + putreg32(regval, (uint16_t)addr); + irqrestore(flags); +} diff --git a/nuttx/arch/x86/src/common/up_modifyreg8.c b/nuttx/arch/x86/src/common/up_modifyreg8.c new file mode 100644 index 000000000..fd4031dc5 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_modifyreg8.c @@ -0,0 +1,85 @@ +/**************************************************************************** + * arch/x86/src/common/up_modifyreg8.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <debug.h> + +#include <arch/irq.h> +#include <nuttx/arch.h> + +#include "up_arch.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: modifyreg8 + * + * Description: + * Atomically modify the specified bits in a memory mapped register + * + ****************************************************************************/ + +void modifyreg8(unsigned int addr, uint8_t clearbits, uint8_t setbits) +{ + irqstate_t flags; + uint8_t regval; + + flags = irqsave(); + regval = getreg8((uint16_t)addr); + regval &= ~clearbits; + regval |= setbits; + putreg8(regval, (uint16_t)addr); + irqrestore(flags); +} diff --git a/nuttx/arch/x86/src/common/up_puts.c b/nuttx/arch/x86/src/common/up_puts.c new file mode 100644 index 000000000..58420c598 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_puts.c @@ -0,0 +1,75 @@ +/**************************************************************************** + * arch/x86/src/common/up_puts.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/arch.h> + +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_puts + * + * Description: + * This is a low-level helper function used to support debug. + * + ****************************************************************************/ + +void up_puts(const char *str) +{ + while(*str) + { + up_putc(*str++); + } +} diff --git a/nuttx/arch/x86/src/common/up_releasepending.c b/nuttx/arch/x86/src/common/up_releasepending.c new file mode 100755 index 000000000..f476837da --- /dev/null +++ b/nuttx/arch/x86/src/common/up_releasepending.c @@ -0,0 +1,132 @@ +/**************************************************************************** + * arch/arm/src/arm/up_releasepending.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sched.h> +#include <debug.h> +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_release_pending + * + * Description: + * Release and ready-to-run tasks that have + * collected in the pending task list. This can call a + * context switch if a new task is placed at the head of + * the ready to run list. + * + ****************************************************************************/ + +void up_release_pending(void) +{ + _TCB *rtcb = (_TCB*)g_readytorun.head; + + slldbg("From TCB=%p\n", rtcb); + + /* Merge the g_pendingtasks list into the g_readytorun task list */ + + /* sched_lock(); */ + if (sched_mergepending()) + { + /* The currently active task has changed! We will need to + * switch contexts. First check if we are operating in + * interrupt context: + */ + + if (current_regs) + { + /* Yes, then we have to do things differently. + * Just copy the current_regs into the OLD rtcb. + */ + + up_savestate(rtcb->xcp.regs); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (_TCB*)g_readytorun.head; + slldbg("New Active Task TCB=%p\n", rtcb); + + /* Then switch contexts */ + + up_restorestate(rtcb->xcp.regs); + } + + /* Copy the exception context into the TCB of the task that + * was currently active. if up_saveusercontext returns a non-zero + * value, then this is really the previously running task + * restarting! + */ + + else if (!up_saveusercontext(rtcb->xcp.regs)) + { + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (_TCB*)g_readytorun.head; + slldbg("New Active Task TCB=%p\n", rtcb); + + /* Then switch contexts */ + + up_fullcontextrestore(rtcb->xcp.regs); + } + } +} diff --git a/nuttx/arch/x86/src/common/up_reprioritizertr.c b/nuttx/arch/x86/src/common/up_reprioritizertr.c new file mode 100755 index 000000000..5df8c26b0 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_reprioritizertr.c @@ -0,0 +1,187 @@ +/**************************************************************************** + * arch/arm/src/arm/up_reprioritizertr.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <stdbool.h> +#include <sched.h> +#include <debug.h> +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_reprioritize_rtr + * + * Description: + * Called when the priority of a running or + * ready-to-run task changes and the reprioritization will + * cause a context switch. Two cases: + * + * 1) The priority of the currently running task drops and the next + * task in the ready to run list has priority. + * 2) An idle, ready to run task's priority has been raised above the + * the priority of the current, running task and it now has the + * priority. + * + * Inputs: + * tcb: The TCB of the task that has been reprioritized + * priority: The new task priority + * + ****************************************************************************/ + +void up_reprioritize_rtr(_TCB *tcb, uint8_t priority) +{ + /* Verify that the caller is sane */ + + if (tcb->task_state < FIRST_READY_TO_RUN_STATE || + tcb->task_state > LAST_READY_TO_RUN_STATE +#if SCHED_PRIORITY_MIN > 0 + || priority < SCHED_PRIORITY_MIN +#endif +#if SCHED_PRIORITY_MAX < UINT8_MAX + || priority > SCHED_PRIORITY_MAX +#endif + ) + { + PANIC(OSERR_BADREPRIORITIZESTATE); + } + else + { + _TCB *rtcb = (_TCB*)g_readytorun.head; + bool switch_needed; + + slldbg("TCB=%p PRI=%d\n", tcb, priority); + + /* Remove the tcb task from the ready-to-run list. + * sched_removereadytorun will return true if we just + * remove the head of the ready to run list. + */ + + switch_needed = sched_removereadytorun(tcb); + + /* Setup up the new task priority */ + + tcb->sched_priority = (uint8_t)priority; + + /* Return the task to the specified blocked task list. + * sched_addreadytorun will return true if the task was + * added to the new list. We will need to perform a context + * switch only if the EXCLUSIVE or of the two calls is non-zero + * (i.e., one and only one the calls changes the head of the + * ready-to-run list). + */ + + switch_needed ^= sched_addreadytorun(tcb); + + /* Now, perform the context switch if one is needed */ + + if (switch_needed) + { + /* If we are going to do a context switch, then now is the right + * time to add any pending tasks back into the ready-to-run list. + * task list now + */ + + if (g_pendingtasks.head) + { + sched_mergepending(); + } + + /* Are we in an interrupt handler? */ + + if (current_regs) + { + /* Yes, then we have to do things differently. + * Just copy the current_regs into the OLD rtcb. + */ + + up_savestate(rtcb->xcp.regs); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (_TCB*)g_readytorun.head; + slldbg("New Active Task TCB=%p\n", rtcb); + + /* Then switch contexts */ + + up_restorestate(rtcb->xcp.regs); + } + + /* Copy the exception context into the TCB at the (old) head of the + * g_readytorun Task list. if up_saveusercontext returns a non-zero + * value, then this is really the previously running task restarting! + */ + + else if (!up_saveusercontext(rtcb->xcp.regs)) + { + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (_TCB*)g_readytorun.head; + slldbg("New Active Task TCB=%p\n", rtcb); + + /* Then switch contexts */ + + up_fullcontextrestore(rtcb->xcp.regs); + } + } + } +} diff --git a/nuttx/arch/x86/src/common/up_udelay.c b/nuttx/arch/x86/src/common/up_udelay.c new file mode 100644 index 000000000..92d3b7c16 --- /dev/null +++ b/nuttx/arch/x86/src/common/up_udelay.c @@ -0,0 +1,129 @@ +/**************************************************************************** + * arch/x86/src/common/up_udelay.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <sys/types.h> +#include <nuttx/arch.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#define CONFIG_BOARD_LOOPSPER100USEC ((CONFIG_BOARD_LOOPSPERMSEC+5)/10) +#define CONFIG_BOARD_LOOPSPER10USEC ((CONFIG_BOARD_LOOPSPERMSEC+50)/100) +#define CONFIG_BOARD_LOOPSPERUSEC ((CONFIG_BOARD_LOOPSPERMSEC+500)/1000) + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_udelay + * + * Description: + * Delay inline for the requested number of microseconds. NOTE: Because + * of all of the setup, several microseconds will be lost before the actual + * timing looop begins. Thus, the delay will always be a few microseconds + * longer than requested. + * + * *** NOT multi-tasking friendly *** + * + * ASSUMPTIONS: + * The setting CONFIG_BOARD_LOOPSPERMSEC has been calibrated + * + ****************************************************************************/ + +void up_udelay(useconds_t microseconds) +{ + volatile int i; + + /* We'll do this a little at a time because we expect that the + * CONFIG_BOARD_LOOPSPERUSEC is very inaccurate during to truncation in + * the divisions of its calculation. We'll use the largest values that + * we can in order to prevent significant error buildup in the loops. + */ + + while (microseconds > 1000) + { + for (i = 0; i < CONFIG_BOARD_LOOPSPERMSEC; i++) + { + } + microseconds -= 1000; + } + + while (microseconds > 100) + { + for (i = 0; i < CONFIG_BOARD_LOOPSPER100USEC; i++) + { + } + microseconds -= 100; + } + + while (microseconds > 10) + { + for (i = 0; i < CONFIG_BOARD_LOOPSPER10USEC; i++) + { + } + microseconds -= 10; + } + + while (microseconds > 0) + { + for (i = 0; i < CONFIG_BOARD_LOOPSPERUSEC; i++) + { + } + microseconds--; + } +} diff --git a/nuttx/arch/x86/src/common/up_unblocktask.c b/nuttx/arch/x86/src/common/up_unblocktask.c new file mode 100755 index 000000000..7dd263f1a --- /dev/null +++ b/nuttx/arch/x86/src/common/up_unblocktask.c @@ -0,0 +1,158 @@ +/**************************************************************************** + * arch/x86/src/common/up_unblocktask.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sched.h> +#include <debug.h> +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "clock_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_unblock_task + * + * Description: + * A task is currently in an inactive task list but has been prepped to + * execute. Move the TCB to the ready-to-run list, restore its context, + * and start execution. + * + * Inputs: + * tcb: Refers to the tcb to be unblocked. This tcb is in one of the + * waiting tasks lists. It must be moved to the ready-to-run list and, + * if it is the highest priority ready to run taks, executed. + * + ****************************************************************************/ + +void up_unblock_task(_TCB *tcb) +{ + /* Verify that the context switch can be performed */ + + if ((tcb->task_state < FIRST_BLOCKED_STATE) || + (tcb->task_state > LAST_BLOCKED_STATE)) + { + PANIC(OSERR_BADUNBLOCKSTATE); + } + else + { + _TCB *rtcb = (_TCB*)g_readytorun.head; + + /* Remove the task from the blocked task list */ + + sched_removeblocked(tcb); + + /* Reset its timeslice. This is only meaningful for round + * robin tasks but it doesn't here to do it for everything + */ + +#if CONFIG_RR_INTERVAL > 0 + tcb->timeslice = CONFIG_RR_INTERVAL / MSEC_PER_TICK; +#endif + + /* Add the task in the correct location in the prioritized + * g_readytorun task list + */ + + if (sched_addreadytorun(tcb)) + { + /* The currently active task has changed! We need to do + * a context switch to the new task. + * + * Are we in an interrupt handler? + */ + + if (current_regs) + { + /* Yes, then we have to do things differently. + * Just copy the current_regs into the OLD rtcb. + */ + + up_savestate(rtcb->xcp.regs); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (_TCB*)g_readytorun.head; + + /* Then switch contexts */ + + up_restorestate(rtcb->xcp.regs); + } + + /* We are not in an interrupt handler. Copy the user C context + * into the TCB of the task that was previously active. if + * up_saveusercontext returns a non-zero value, then this is really the + * previously running task restarting! + */ + + else if (!up_saveusercontext(rtcb->xcp.regs)) + { + /* Restore the exception context of the new task that is ready to + * run (probably tcb). This is the new rtcb at the head of the + * g_readytorun task list. + */ + + rtcb = (_TCB*)g_readytorun.head; + + /* Then switch contexts */ + + up_fullcontextrestore(rtcb->xcp.regs); + } + } + } +} diff --git a/nuttx/arch/x86/src/i486/i486_utils.S b/nuttx/arch/x86/src/i486/i486_utils.S new file mode 100644 index 000000000..ee89c0c68 --- /dev/null +++ b/nuttx/arch/x86/src/i486/i486_utils.S @@ -0,0 +1,96 @@ +/**************************************************************************** + * arch/x86/src/i486/i486_utils.S + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Based on Bran's kernel development tutorials. Rewritten for JamesM's + * kernel development tutorials. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + + .file "i486_utils.S" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + + #define KSEG 0x10 + +/**************************************************************************** + * Globals + ****************************************************************************/ + + .globl gdt_flush + .globl idt_flush + +/**************************************************************************** + * .text + ****************************************************************************/ + + .text + +/**************************************************************************** + * Name: gdt_flush + ****************************************************************************/ + + .type gdt_flush, @function +gdt_flush: + movl %eax, 4(%esp) /* Get the pointer to the GDT, passed as a parameter */ + lgdt (%eax) /* Load the new GDT pointer */ + + mov $KSEG, %ax /* KSEG is the offset in the GDT to our data segment */ + mov %ax, %ds /* Load all data segment selectors */ + mov %ax, %es + mov %ax, %fs + mov %ax, %gs + mov %ax, %ss + jmp $0x08, $.Lgflush /* 0x08 is the offset to our code segment: Far jump! */ +.Lgflush: + ret + .size gdt_flush, . - gdt_flush + +/**************************************************************************** + * Name: idt_flush + ****************************************************************************/ + + .type idt_flush, @function +idt_flush: + movl %eax, 4(%esp) /* Get the pointer to the IDT, passed as a parameter */ + lidt (%eax) /* Load the IDT pointer */ + ret + .size idt_flush, . - idt_flush + .end diff --git a/nuttx/arch/x86/src/i486/up_createstack.c b/nuttx/arch/x86/src/i486/up_createstack.c new file mode 100644 index 000000000..842872d31 --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_createstack.c @@ -0,0 +1,135 @@ +/**************************************************************************** + * arch/x86/src/i486/up_createstack.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <stdint.h> +#include <stdlib.h> +#include <sched.h> +#include <debug.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/arch.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_create_stack + * + * Description: + * Allocate a stack for a new thread and setup up stack-related information + * in the TCB. + * + * The following TCB fields must be initialized: + * adj_stack_size: Stack size after adjustment for hardware, processor, + * etc. This value is retained only for debug purposes. + * stack_alloc_ptr: Pointer to allocated stack + * adj_stack_ptr: Adjusted stack_alloc_ptr for HW. The initial value of + * the stack pointer. + * + * Inputs: + * tcb: The TCB of new task + * stack_size: The requested stack size. At least this much must be + * allocated. + * + ****************************************************************************/ + +int up_create_stack(_TCB *tcb, size_t stack_size) +{ + if (tcb->stack_alloc_ptr && tcb->adj_stack_size != stack_size) + { + sched_free(tcb->stack_alloc_ptr); + tcb->stack_alloc_ptr = NULL; + } + + if (!tcb->stack_alloc_ptr) + { +#ifdef CONFIG_DEBUG + tcb->stack_alloc_ptr = (uint32_t*)zalloc(stack_size); +#else + tcb->stack_alloc_ptr = (uint32_t*)malloc(stack_size); +#endif + } + + if (tcb->stack_alloc_ptr) + { + size_t top_of_stack; + size_t size_of_stack; + + /* The i486 uses a push-down stack: the stack grows toward lower + * addresses in memory. The stack pointer register, points to the + * lowest, valid work address (the "top" of the stack). Items on + * the stack are referenced as positive word offsets from sp. + */ + + top_of_stack = (uint32_t)tcb->stack_alloc_ptr + stack_size - 4; + + /* The i486 stack must be aligned at word (4 byte) boundaries. If + * necessary top_of_stack must be rounded down to the next boundary + */ + + top_of_stack &= ~3; + size_of_stack = top_of_stack - (uint32_t)tcb->stack_alloc_ptr + 4; + + /* Save the adjusted stack values in the _TCB */ + + tcb->adj_stack_ptr = (uint32_t*)top_of_stack; + tcb->adj_stack_size = size_of_stack; + + up_ledon(LED_STACKCREATED); + return OK; + } + + return ERROR; +} diff --git a/nuttx/arch/x86/src/i486/up_initialstate.c b/nuttx/arch/x86/src/i486/up_initialstate.c new file mode 100644 index 000000000..c1bb422da --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_initialstate.c @@ -0,0 +1,126 @@ +/**************************************************************************** + * arch/x86/src/i486/up_initialstate.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <string.h> + +#include <nuttx/arch.h> +#include <arch/arch.h> + +#include "up_internal.h" +#include "up_arch.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_initial_state + * + * Description: + * A new thread is being started and a new TCB has been created. This + * function is called to initialize the processor specific portions of the + * new TCB. + * + * This function must setup the intial architecture registers and/or stack + * so that execution will begin at tcb->start on the next context switch. + * + ****************************************************************************/ + +void up_initial_state(_TCB *tcb) +{ + struct xcptcontext *xcp = &tcb->xcp; + + /* Initialize the initial exception register context structure */ + + memset(xcp, 0, sizeof(struct xcptcontext)); + + /* Save the initial stack pointer... the value of the stackpointer before + * the "interrupt occurs." We don't know the value of REG_ESP yet.. + * that depends on if a priority change is required or not. + */ + + xcp->regs[REG_SP] = (uint32_t)tcb->adj_stack_ptr; + + /* Save the task entry point */ + + xcp->regs[REG_EIP] = (uint32_t)tcb->start; + + /* Set up the segment registers... assume the same segment as the caller. + * That is not a good assumption in the long run. + */ + + xcp->regs[REG_DS] = up_getds(); + xcp->regs[REG_CS] = up_getcs(); + xcp->regs[REG_SS] = up_getss(); + + /* Set supervisor- or user-mode, depending on how NuttX is configured and + * what kind of thread is being started. Disable FIQs in any event + * + * If the kernel build is not selected, then all threads run in + * supervisor-mode. + */ + +#ifdef CONFIG_NUTTX_KERNEL +# error "Missing logic for the CONFIG_NUTTX_KERNEL build" +#endif + + /* Enable or disable interrupts, based on user configuration. If the IF + * bit is set, maskable interrupts will be enabled. + */ + +#ifndef CONFIG_SUPPRESS_INTERRUPTS + xcp->regs[REG_EFLAGS] = X86_FLAGS_IF; +#endif +} + diff --git a/nuttx/arch/x86/src/i486/up_irq.c b/nuttx/arch/x86/src/i486/up_irq.c new file mode 100755 index 000000000..01da4962e --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_irq.c @@ -0,0 +1,376 @@ +/**************************************************************************** + * arch/x86/src/i486/up_irq.c + * arch/x86/src/chip/up_irq.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <string.h> +#include <debug.h> + +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include <arch/irq.h> +#include <arch/io.h> + +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" +#include "qemu_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static void idt_outb(uint8_t val, uint16_t addr) __attribute__((noinline)); +static void up_remappic(void); +static void up_idtentry(unsigned int index, uint32_t base, uint16_t sel, + uint8_t flags); +static inline void up_idtinit(void); + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +volatile uint32_t *current_regs; + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static struct idt_entry_s idt_entries[256]; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name idt_outb + * + * Description: + * A slightly slower version of outb + * + ****************************************************************************/ + +static void idt_outb(uint8_t val, uint16_t addr) +{ + outb(val, addr); +} + +/**************************************************************************** + * Name up_remappic + * + * Description: + * Remap the PIC. The Programmable Interrupt Controller (PIC) is used to + * combine several sources of interrupt onto one or more CPU lines, while + * allowing priority levels to be assigned to its interrupt outputs. When + * the device has multiple interrupt outputs to assert, it will assert them + * in the order of their relative priority. + * + ****************************************************************************/ + +static void up_remappic(void) +{ + /* Mask interrupts from PIC */ + + idt_outb(PIC1_IMR_ALL, PIC1_IMR); + idt_outb(PIC2_IMR_ALL, PIC2_IMR); + + /* If the PIC has been reset, it must be initialized with 2 to 4 Initialization + * Command Words (ICW) before it will accept and process Interrupt Requests. The + * following outlines the four possible Initialization Command Words. + */ + + /* Remap the irq table for primary: + * + * ICW1 - We will be sending ICW4 + * ICW2 - Address + * ICW3 */ + + idt_outb(PIC_ICW1_ICW4|PIC_ICW1_ICW1, PIC1_ICW1); + idt_outb(0x20, PIC1_ICW2); + idt_outb(PIC1_ICW3_IRQ2, PIC1_ICW3); + idt_outb(PIC_ICW4_808xMODE, PIC1_ICW4); + + /* Remap irq for slave */ + + idt_outb(PIC_ICW1_ICW4|PIC_ICW1_ICW1, PIC2_ICW1); + idt_outb(0x28, PIC2_ICW2); + idt_outb(PIC_ICW3_SID2, PIC2_ICW3); + idt_outb(PIC_ICW4_808xMODE, PIC2_ICW4); + + /* Mask interrupts from PIC */ + + idt_outb(PIC1_IMR_ALL, PIC1_IMR); + idt_outb(PIC2_IMR_ALL, PIC2_IMR); +} + +/**************************************************************************** + * Name up_idtentry + * + * Description: + * Initialize one IDT entry. + * + ****************************************************************************/ + +static void up_idtentry(unsigned int index, uint32_t base, uint16_t sel, + uint8_t flags) +{ + struct idt_entry_s *entry = &idt_entries[index]; + + entry->lobase = base & 0xffff; + entry->hibase = (base >> 16) & 0xffff; + + entry->sel = sel; + entry->zero = 0; + + /* We must uncomment the OR below when we get to using user-mode. It sets the + * interrupt gate's privilege level to 3. + */ + + entry->flags = flags /* | 0x60 */; +} + +/**************************************************************************** + * Name up_idtinit + * + * Description: + * Initialize the IDT. The Interrupt Descriptor Table (IDT) is a data + * structure used by the x86 architecture to implement an interrupt vector + * table. The IDT is used by the processor to determine the correct + * response to interrupts and exceptions. + * + ****************************************************************************/ + +static inline void up_idtinit(void) +{ + struct idt_ptr_s idt_ptr; + + idt_ptr.limit = sizeof(struct idt_entry_s) * 256 - 1; + idt_ptr.base = (uint32_t)&idt_entries; + + memset(&idt_entries, 0, sizeof(struct idt_entry_s)*256); + + /* Re-map the PIC */ + + up_remappic(); + + /* Set each ISR/IRQ to the appropriate vector with selector=8 and with + * 32-bit interrupt gate. Interrupt gate (vs. trap gate) will leave + * interrupts enabled when the IRS/IRQ handler is entered. + */ + + up_idtentry(ISR0, (uint32_t)vector_isr0 , 0x08, 0x8e); + up_idtentry(ISR1, (uint32_t)vector_isr1 , 0x08, 0x8e); + up_idtentry(ISR2, (uint32_t)vector_isr2 , 0x08, 0x8e); + up_idtentry(ISR3, (uint32_t)vector_isr3 , 0x08, 0x8e); + up_idtentry(ISR4, (uint32_t)vector_isr4 , 0x08, 0x8e); + up_idtentry(ISR5, (uint32_t)vector_isr5 , 0x08, 0x8e); + up_idtentry(ISR6, (uint32_t)vector_isr6 , 0x08, 0x8e); + up_idtentry(ISR7, (uint32_t)vector_isr7 , 0x08, 0x8e); + up_idtentry(ISR8, (uint32_t)vector_isr8 , 0x08, 0x8e); + up_idtentry(ISR9, (uint32_t)vector_isr9 , 0x08, 0x8e); + up_idtentry(ISR10, (uint32_t)vector_isr10, 0x08, 0x8e); + up_idtentry(ISR11, (uint32_t)vector_isr11, 0x08, 0x8e); + up_idtentry(ISR12, (uint32_t)vector_isr12, 0x08, 0x8e); + up_idtentry(ISR13, (uint32_t)vector_isr13, 0x08, 0x8e); + up_idtentry(ISR14, (uint32_t)vector_isr14, 0x08, 0x8e); + up_idtentry(ISR15, (uint32_t)vector_isr15, 0x08, 0x8e); + up_idtentry(ISR16, (uint32_t)vector_isr16, 0x08, 0x8e); + up_idtentry(ISR17, (uint32_t)vector_isr17, 0x08, 0x8e); + up_idtentry(ISR18, (uint32_t)vector_isr18, 0x08, 0x8e); + up_idtentry(ISR19, (uint32_t)vector_isr19, 0x08, 0x8e); + up_idtentry(ISR20, (uint32_t)vector_isr20, 0x08, 0x8e); + up_idtentry(ISR21, (uint32_t)vector_isr21, 0x08, 0x8e); + up_idtentry(ISR22, (uint32_t)vector_isr22, 0x08, 0x8e); + up_idtentry(ISR23, (uint32_t)vector_isr23, 0x08, 0x8e); + up_idtentry(ISR24, (uint32_t)vector_isr24, 0x08, 0x8e); + up_idtentry(ISR25, (uint32_t)vector_isr25, 0x08, 0x8e); + up_idtentry(ISR26, (uint32_t)vector_isr26, 0x08, 0x8e); + up_idtentry(ISR27, (uint32_t)vector_isr27, 0x08, 0x8e); + up_idtentry(ISR28, (uint32_t)vector_isr28, 0x08, 0x8e); + up_idtentry(ISR29, (uint32_t)vector_isr29, 0x08, 0x8e); + up_idtentry(ISR30, (uint32_t)vector_isr30, 0x08, 0x8e); + up_idtentry(ISR31, (uint32_t)vector_isr31, 0x08, 0x8e); + + up_idtentry(IRQ0, (uint32_t)vector_irq0, 0x08, 0x8e); + up_idtentry(IRQ1, (uint32_t)vector_irq1, 0x08, 0x8e); + up_idtentry(IRQ2, (uint32_t)vector_irq2, 0x08, 0x8e); + up_idtentry(IRQ3, (uint32_t)vector_irq3, 0x08, 0x8e); + up_idtentry(IRQ4, (uint32_t)vector_irq4, 0x08, 0x8e); + up_idtentry(IRQ5, (uint32_t)vector_irq5, 0x08, 0x8e); + up_idtentry(IRQ6, (uint32_t)vector_irq6, 0x08, 0x8e); + up_idtentry(IRQ7, (uint32_t)vector_irq7, 0x08, 0x8e); + up_idtentry(IRQ8, (uint32_t)vector_irq8, 0x08, 0x8e); + up_idtentry(IRQ9, (uint32_t)vector_irq9, 0x08, 0x8e); + up_idtentry(IRQ10, (uint32_t)vector_irq10, 0x08, 0x8e); + up_idtentry(IRQ11, (uint32_t)vector_irq11, 0x08, 0x8e); + up_idtentry(IRQ12, (uint32_t)vector_irq12, 0x08, 0x8e); + up_idtentry(IRQ13, (uint32_t)vector_irq13, 0x08, 0x8e); + up_idtentry(IRQ14, (uint32_t)vector_irq14, 0x08, 0x8e); + up_idtentry(IRQ15, (uint32_t)vector_irq15, 0x08, 0x8e); + + /* Then program the IDT */ + + idt_flush((uint32_t)&idt_ptr); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_irqinitialize + ****************************************************************************/ + +void up_irqinitialize(void) +{ + /* currents_regs is non-NULL only while processing an interrupt */ + + current_regs = NULL; + + /* Initialize the IDT */ + + up_idtinit(); + + /* And finally, enable interrupts */ + +#ifndef CONFIG_SUPPRESS_INTERRUPTS + irqrestore(X86_FLAGS_IF); +#endif +} + +/**************************************************************************** + * Name: up_disable_irq + * + * Description: + * Disable the IRQ specified by 'irq' + * + ****************************************************************************/ + +void up_disable_irq(int irq) +{ + unsigned int regaddr; + uint8_t regbit; + + if (irq >= IRQ0) + { + /* Map the IRQ IMR regiser to a PIC and a bit number */ + + if (irq <= IRQ7) + { + regaddr = PIC1_IMR; + regbit = (1 << (irq - IRQ0)); + } + else if (irq <= IRQ15) + { + regaddr = PIC2_IMR; + regbit = (1 << (irq - IRQ8)); + } + else + { + return; + } + + /* Disable (mask) the interrupt */ + + modifyreg8(regaddr, 0, regbit); + } +} + +/**************************************************************************** + * Name: up_enable_irq + * + * Description: + * Enable the IRQ specified by 'irq' + * + ****************************************************************************/ + +void up_enable_irq(int irq) +{ + unsigned int regaddr; + uint8_t regbit; + + if (irq >= IRQ0) + { + /* Map the IRQ IMR regiser to a PIC and a bit number */ + + if (irq <= IRQ7) + { + regaddr = PIC1_IMR; + regbit = (1 << (irq - IRQ0)); + } + else if (irq <= IRQ15) + { + regaddr = PIC2_IMR; + regbit = (1 << (irq - IRQ8)); + } + else + { + return; + } + + /* Enable (unmask) the interrupt */ + + modifyreg8(regaddr, regbit, 0); + } +} + +/**************************************************************************** + * Name: up_prioritize_irq + * + * Description: + * Set the priority of an IRQ. + * + * Since this API is not supported on all architectures, it should be + * avoided in common implementations where possible. + * + ****************************************************************************/ + +#ifdef CONFIG_ARCH_IRQPRIO +int up_prioritize_irq(int irq, int priority) +{ +#warning "Missing Logic" + return OK; +} +#endif diff --git a/nuttx/arch/x86/src/i486/up_regdump.c b/nuttx/arch/x86/src/i486/up_regdump.c new file mode 100644 index 000000000..5a5da0e70 --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_regdump.c @@ -0,0 +1,82 @@ +/**************************************************************************** + * arch/x86/src/i486/up_regdump.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <debug.h> +#include <nuttx/irq.h> + +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Output debug info -- even if debug is not selected. */ + +#undef lldbg +#define lldbg lib_lowprintf + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ +/**************************************************************************** + * Name: up_registerdump + ****************************************************************************/ + +void up_registerdump(uint32_t *regs) +{ + lldbg(" ds:%08x irq:%08x err:%08x\n", + regs[REG_DS], regs[REG_IRQNO], regs[REG_ERRCODE]); + lldbg("edi:%08x esi:%08x ebp:%08x esp:%08x\n", + regs[REG_EDI], regs[REG_ESI], regs[REG_EBP], regs[REG_ESP]); + lldbg("ebx:%08x edx:%08x ecx:%08x eax:%08x\n", + regs[REG_EBX], regs[REG_EDX], regs[REG_ECX], regs[REG_EAX]); + lldbg("eip:%08x cs:%08x flg:%08x sp:%08x ss:%08x\n", + regs[REG_EIP], regs[REG_CS], regs[REG_EFLAGS], regs[REG_SP], + regs[REG_SS]); +} diff --git a/nuttx/arch/x86/src/i486/up_releasestack.c b/nuttx/arch/x86/src/i486/up_releasestack.c new file mode 100644 index 000000000..ac93688d6 --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_releasestack.c @@ -0,0 +1,79 @@ +/**************************************************************************** + * arch/x86/src/common/up_releasestack.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sched.h> +#include <debug.h> +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_release_stack + * + * Description: + * A task has been stopped. Free all stack related resources retained in + * the defunct TCB. + * + ****************************************************************************/ + +void up_release_stack(_TCB *dtcb) +{ + if (dtcb->stack_alloc_ptr) + { + sched_free(dtcb->stack_alloc_ptr); + dtcb->stack_alloc_ptr = NULL; + } + + dtcb->adj_stack_size = 0; +} diff --git a/nuttx/arch/x86/src/i486/up_savestate.c b/nuttx/arch/x86/src/i486/up_savestate.c new file mode 100644 index 000000000..1d35c62a9 --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_savestate.c @@ -0,0 +1,113 @@ +/**************************************************************************** + * arch/x86/src/i486/up_savestate.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <debug.h> + +#include <arch/arch.h> +#include <arch/irq.h> + +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ +/**************************************************************************** + * Name: up_savestate + * + * Description: + * This function saves the interrupt level context information in the + * TCB. This would just be a up_copystate but we have to handle one + * special case. In the case where the privilige level changes, the + * value of sp and ss will not be saved on stack by the interrupt handler. + * So, in that case, we will have to fudge those values here. + * + ****************************************************************************/ + +void up_savestate(uint32_t *regs) +{ + uint8_t cpl; + uint8_t rpl; + + /* First, just copy all of the registers */ + + up_copystate(regs, (uint32_t*)current_regs); + + /* The RES_SP and REG_SS values will not be saved by the interrupt handling + * logic if there is no change in privilege level. In that case, we will + * have to "fudge" those values here. For now, just overwrite the REG_SP + * and REG_SS values with what we believe to be correct. Obviously, this + * will have to change in the future to support multi-segment operation. + * + * Check for a change in privilege level. + */ + + rpl = regs[REG_CS] & 3; + cpl = up_getcs() & 3; + DEBUGASSERT(rpl >= cpl); + + if (rpl == cpl) + { + /* No priority change, SP and SS are not present in the stack frame. + * + * The value saved in the REG_ESP will be the stackpointer value prior to + * the execution of the PUSHA. It will point at REG_IRQNO. + */ + + regs[REG_SP] = current_regs[REG_ESP] + 4*BOTTOM_NOPRIO; + regs[REG_SS] = up_getss(); + } + else + { + DEBUGASSERT(regs[REG_SP] == current_regs[REG_ESP] + 4*BOTTOM_PRIO); + } +} diff --git a/nuttx/arch/x86/src/i486/up_schedulesigaction.c b/nuttx/arch/x86/src/i486/up_schedulesigaction.c new file mode 100644 index 000000000..7d91bb3e3 --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_schedulesigaction.c @@ -0,0 +1,198 @@ +/**************************************************************************** + * arch/x86/src/i486/up_schedulesigaction.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "up_internal.h" +#include "up_arch.h" + +#ifndef CONFIG_DISABLE_SIGNALS + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_schedule_sigaction + * + * Description: + * This function is called by the OS when one or more signal handling + * actions have been queued for execution. The architecture specific code + * must configure things so that the 'sigdeliver' callback is executed on + * the thread specified by 'tcb' as soon as possible. + * + * This function may be called from interrupt handling logic. + * + * This operation should not cause the task to be unblocked nor should it + * cause any immediate execution of sigdeliver. Typically, a few cases need + * to be considered: + * + * (1) This function may be called from an interrupt handler. During + * interrupt processing, all xcptcontext structures should be valid for + * all tasks. That structure should be modified to invoke sigdeliver() + * either on return from (this) interrupt or on some subsequent context + * switch to the recipient task. + * (2) If not in an interrupt handler and the tcb is NOT the currently + * executing task, then again just modify the saved xcptcontext + * structure for the recipient task so it will invoke sigdeliver when + * that task is later resumed. + * (3) If not in an interrupt handler and the tcb IS the currently + * executing task -- just call the signal handler now. + * + ****************************************************************************/ + +void up_schedule_sigaction(_TCB *tcb, sig_deliver_t sigdeliver) +{ + /* Refuse to handle nested signal actions */ + + sdbg("tcb=0x%p sigdeliver=0x%p\n", tcb, sigdeliver); + + if (!tcb->xcp.sigdeliver) + { + irqstate_t flags; + + /* Make sure that interrupts are disabled */ + + flags = irqsave(); + + /* First, handle some special cases when the signal is being delivered + * to the currently executing task. + */ + + sdbg("rtcb=0x%p current_regs=0x%p\n", g_readytorun.head, current_regs); + + if (tcb == (_TCB*)g_readytorun.head) + { + /* CASE 1: We are not in an interrupt handler and a task is + * signalling itself for some reason. + */ + + if (!current_regs) + { + /* In this case just deliver the signal now. */ + + sigdeliver(tcb); + } + + /* CASE 2: We are in an interrupt handler AND the interrupted task + * is the same as the one that must receive the signal, then we will + * have to modify the return state as well as the state in the TCB. + * + * Hmmm... there looks like a latent bug here: The following logic + * would fail in the strange case where we are in an interrupt + * handler, the thread is signalling itself, but a context switch to + * another task has occurred so that current_regs does not refer to + * the thread at g_readytorun.head! + */ + + else + { + /* Save the return lr and cpsr and one scratch register. These + * will be restored by the signal trampoline after the signals + * have been delivered. + */ + + tcb->xcp.sigdeliver = sigdeliver; + tcb->xcp.saved_eip = current_regs[REG_EIP]; + tcb->xcp.saved_eflags = current_regs[REG_EFLAGS]; + + /* Then set up to vector to the trampoline with interrupts + * disabled + */ + + current_regs[REG_EIP] = (uint32_t)up_sigdeliver; + current_regs[REG_EFLAGS] = 0; + + /* And make sure that the saved context in the TCB + * is the same as the interrupt return context. + */ + + up_savestate(tcb->xcp.regs); + } + } + + /* Otherwise, we are (1) signaling a task is not running + * from an interrupt handler or (2) we are not in an + * interrupt handler and the running task is signalling + * some non-running task. + */ + + else + { + /* Save the return lr and cpsr and one scratch register + * These will be restored by the signal trampoline after + * the signals have been delivered. + */ + + tcb->xcp.sigdeliver = sigdeliver; + tcb->xcp.saved_eip = tcb->xcp.regs[REG_EIP]; + tcb->xcp.saved_eflags = tcb->xcp.regs[REG_EFLAGS]; + + /* Then set up to vector to the trampoline with interrupts + * disabled + */ + + tcb->xcp.regs[REG_EIP] = (uint32_t)up_sigdeliver; + tcb->xcp.regs[REG_EFLAGS] = 0; + } + + irqrestore(flags); + } +} + +#endif /* !CONFIG_DISABLE_SIGNALS */ diff --git a/nuttx/arch/x86/src/i486/up_sigdeliver.c b/nuttx/arch/x86/src/i486/up_sigdeliver.c new file mode 100644 index 000000000..8dbf46698 --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_sigdeliver.c @@ -0,0 +1,139 @@ +/**************************************************************************** + * arch/x86/src/i486/up_sigdeliver.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <sched.h> +#include <debug.h> + +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include <arch/board/board.h> + +#include "os_internal.h" +#include "up_internal.h" +#include "up_arch.h" + +#ifndef CONFIG_DISABLE_SIGNALS + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_sigdeliver + * + * Description: + * This is the a signal handling trampoline. When a signal action was + * posted. The task context was mucked with and forced to branch to this + * location with interrupts disabled. + * + ****************************************************************************/ + +void up_sigdeliver(void) +{ + _TCB *rtcb = (_TCB*)g_readytorun.head; + uint32_t regs[XCPTCONTEXT_REGS]; + sig_deliver_t sigdeliver; + + /* Save the errno. This must be preserved throughout the signal handling + * so that the user code final gets the correct errno value (probably + * EINTR). + */ + + int saved_errno = rtcb->pterrno; + + up_ledon(LED_SIGNAL); + + sdbg("rtcb=%p sigdeliver=%p sigpendactionq.head=%p\n", + rtcb, rtcb->xcp.sigdeliver, rtcb->sigpendactionq.head); + ASSERT(rtcb->xcp.sigdeliver != NULL); + + /* Save the real return state on the stack. */ + + up_copystate(regs, rtcb->xcp.regs); + regs[REG_EIP] = rtcb->xcp.saved_eip; + regs[REG_EFLAGS] = rtcb->xcp.saved_eflags; + + /* Get a local copy of the sigdeliver function pointer. we do this so that + * we can nullify the sigdeliver function pointer in the TCB and accept + * more signal deliveries while processing the current pending signals. + */ + + sigdeliver = rtcb->xcp.sigdeliver; + rtcb->xcp.sigdeliver = NULL; + + /* Then restore the task interrupt state */ + + irqrestore(regs[REG_EFLAGS]); + + /* Deliver the signals */ + + sigdeliver(rtcb); + + /* Output any debug messages BEFORE restoring errno (because they may + * alter errno), then disable interrupts again and restore the original + * errno that is needed by the user logic (it is probably EINTR). + */ + + sdbg("Resuming\n"); + (void)irqsave(); + rtcb->pterrno = saved_errno; + + /* Then restore the correct state for this thread of execution. */ + + up_ledoff(LED_SIGNAL); + up_fullcontextrestore(regs); +} + +#endif /* !CONFIG_DISABLE_SIGNALS */ + diff --git a/nuttx/arch/x86/src/i486/up_syscall6.S b/nuttx/arch/x86/src/i486/up_syscall6.S new file mode 100755 index 000000000..9c6f879e3 --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_syscall6.S @@ -0,0 +1,97 @@ +/****************************************************************************
+ * arch/x86/src/i486/up_syscall6.S
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Based on Bran's kernel development tutorials. Rewritten for JamesM's
+ * kernel development tutorials.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+ .file "up_syscall6.S"
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Globals
+ ****************************************************************************/
+
+/****************************************************************************
+ * .text
+ ****************************************************************************/
+
+ .text
+
+/****************************************************************************
+ * Name: sys_call6
+ *
+ * C Prototype:
+ * uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1,
+ * uintptr_t parm2, uintptr_t parm3,
+ * uintptr_t parm4, uintptr_t parm5,
+ * uintptr_t parm6);
+ *
+ ****************************************************************************/
+
+ .global sys_call6
+ .type sys_call6, %function
+
+sys_call6:
+ pushl %ebp /* Save ebx, esi, edi, and ebp */
+ pushl %edi
+ pushl %esi
+ pushl %ebx
+
+ movl 44(%esp),%ebp /* Save parm6 in ebp */
+ movl 40(%esp),%edi /* Save parm5 in edi */
+ movl 36(%esp),%esi /* Save parm4 in esi */
+ movl 32(%esp),%edx /* Save parm3 in edx */
+ movl 28(%esp),%ecx /* Save parm2 in ecx */
+ movl 24(%esp),%ebx /* Save parm1 in ebx */
+ movl 20(%esp),%eax /* Save syscall number in eax */
+ int $0x80 /* Execute the trap */
+ /* Return value is in %eax */
+ popl %ebx /* Restore ebx, esi, edi, and ebp */
+ popl %esi
+ popl %edi
+ popl %ebp
+ ret /* And return with result in %eax */
+
+ .size sys_call6,.-sys_call6
+ .end
diff --git a/nuttx/arch/x86/src/i486/up_usestack.c b/nuttx/arch/x86/src/i486/up_usestack.c new file mode 100644 index 000000000..fb8ded0e1 --- /dev/null +++ b/nuttx/arch/x86/src/i486/up_usestack.c @@ -0,0 +1,119 @@ +/**************************************************************************** + * arch/x86/src/common/up_usestack.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <stdint.h> +#include <sched.h> +#include <debug.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/arch.h> + +#include "up_internal.h" + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_use_stack + * + * Description: + * Setup up stack-related information in the TCB using pre-allocated stack + * memory + * + * The following TCB fields must be initialized: + * adj_stack_size: Stack size after adjustment for hardware, processor, + * etc. This value is retained only for debug purposes. + * stack_alloc_ptr: Pointer to allocated stack + * adj_stack_ptr: Adjusted stack_alloc_ptr for HW. The initial value of + * the stack pointer. + * + * Inputs: + * tcb: The TCB of new task + * stack_size: The allocated stack size. + * + ****************************************************************************/ + +int up_use_stack(_TCB *tcb, void *stack, size_t stack_size) +{ + size_t top_of_stack; + size_t size_of_stack; + + if (tcb->stack_alloc_ptr) + { + sched_free(tcb->stack_alloc_ptr); + } + + /* Save the stack allocation */ + + tcb->stack_alloc_ptr = stack; + + /* The i486 uses a push-down stack: the stack grows toward loweraddresses in + * memory. The stack pointer register, points to the lowest, valid work + * address (the "top" of the stack). Items on the stack are referenced as + * positive word offsets from sp. + */ + + top_of_stack = (uint32_t)tcb->stack_alloc_ptr + stack_size - 4; + + /* The i486 stack must be aligned at word (4 byte) boundaries. If necessary + * top_of_stack must be rounded down to the next boundary + */ + + top_of_stack &= ~3; + size_of_stack = top_of_stack - (uint32_t)tcb->stack_alloc_ptr + 4; + + /* Save the adjusted stack values in the _TCB */ + + tcb->adj_stack_ptr = (uint32_t*)top_of_stack; + tcb->adj_stack_size = size_of_stack; + + return OK; +} diff --git a/nuttx/arch/x86/src/qemu/Make.defs b/nuttx/arch/x86/src/qemu/Make.defs new file mode 100755 index 000000000..f4a57128c --- /dev/null +++ b/nuttx/arch/x86/src/qemu/Make.defs @@ -0,0 +1,57 @@ +############################################################################ +# arch/x86/src/qemu/Make.defs +# +# Copyright (C) 2011 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt <spudmonkey@racsa.co.cr> +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# 3. Neither the name NuttX nor the names of its contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +############################################################################ + +# The start-up, "head", file + +HEAD_ASRC = qemu_head.S + +# Common x86 and i486 files + +CMN_ASRCS = i486_utils.S up_syscall6.S +CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_copystate.c \ + up_createstack.c up_mdelay.c up_udelay.c up_exit.c\ + up_initialize.c up_initialstate.c up_interruptcontext.c up_irq.c \ + up_modifyreg8.c up_modifyreg16.c up_modifyreg32.c up_regdump.c \ + up_releasepending.c up_releasestack.c up_reprioritizertr.c \ + up_savestate.c up_sigdeliver.c up_schedulesigaction.c up_unblocktask.c \ + up_usestack.c + +# Required QEMU files + +CHIP_ASRCS = qemu_saveusercontext.S qemu_fullcontextrestore.S qemu_vectors.S +CHIP_CSRCS = qemu_handlers.c qemu_idle.c qemu_lowputc.c qemu_lowsetup.c \ + qemu_serial.c qemu_timerisr.c + +# Configuration-dependent QEMU files diff --git a/nuttx/arch/x86/src/qemu/chip.h b/nuttx/arch/x86/src/qemu/chip.h new file mode 100755 index 000000000..0cbf26cb3 --- /dev/null +++ b/nuttx/arch/x86/src/qemu/chip.h @@ -0,0 +1,74 @@ +/************************************************************************************ + * arch/x86/src/qemu/chip.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +#ifndef __ARCH_X86_SRC_QEMU_QEMU_CHIP_H +#define __ARCH_X86_SRC_QEMU_QEMU_CHIP_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +/* Get customizations for each supported QEMU emulation */ + +#ifdef CONFIG_ARCH_CHIP_QEMU +#else +# error "Unsupported STM32 chip" +#endif + +/* Include only the memory map. Other chip hardware files should then include this + * file for the proper setup + */ + +#include "qemu_memorymap.h" + +/************************************************************************************ + * Public Types + ************************************************************************************/ + +/************************************************************************************ + * Public Data + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +#endif /* __ARCH_X86_SRC_QEMU_QEMU_CHIP_H */ diff --git a/nuttx/arch/x86/src/qemu/qemu_fullcontextrestore.S b/nuttx/arch/x86/src/qemu/qemu_fullcontextrestore.S new file mode 100644 index 000000000..ded55a147 --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_fullcontextrestore.S @@ -0,0 +1,181 @@ +/************************************************************************** + * arch/x86/src/qemu/qemu_fullcontextrestore.S + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + **************************************************************************/ + +/************************************************************************** + * Conditional Compilation Options + **************************************************************************/ + +/************************************************************************** + * Included Files + **************************************************************************/ + +#include <nuttx/config.h> +#include <arch/irq.h> +#include "up_internal.h" + + .file "qemu_fullcontextrestore.S" + +/************************************************************************** + * Pre-processor Definitions + **************************************************************************/ + +/************************************************************************** + * Global Variables + **************************************************************************/ + +/**************************************************************************** + * Macros + ****************************************************************************/ + +/* Trace macros, use like trace 'i' to print char to serial port. */ + + .macro chout, addr, ch +#ifdef CONFIG_DEBUG + mov $\addr, %dx + mov $\ch, %al + out %al, %dx +#endif + .endm + + .macro trace, ch +#ifdef CONFIG_DEBUG + push %eax + push %edx + chout 0x3f8, \ch + pop %edx + pop %eax +#endif + .endm + +/************************************************************************** + * Public Functions + **************************************************************************/ + + .text + +/************************************************************************** + * Name: up_fullcontextrestore + * + * Full C prototype: + * void up_fullcontextrestore(uint32_t *regs) __attribute__ ((noreturn)); + * + **************************************************************************/ + + .globl up_fullcontextrestore + .type up_fullcontextrestore, @function +up_fullcontextrestore: + /* Fetch the pointer to the register save array in EAX. */ + + movl 4(%esp), %eax + + /* Disable interrupts now (the correct EFLAGS will be restored before we + * return + */ + + cli + + /* Get the value of the stack pointer as it was when the pusha was + * executed the interrupt handler. + */ + + movl (4*REG_SP)(%eax), %esp + + /* Create an interrupt stack frame for the final iret. + * + * + * IRET STACK + * PRIO CHANGE No PRIO CHANGE + * --------------- ----------------- + * SP Before -> + * SS EFLAGS + * ESP CS + * EFLAGS -> EIP + * CS ... + * SP After -> EIP + * + * So, first check for a priority change. + */ + + movl (4*REG_CS)(%eax), %edx + andl $3, %edx + mov %cs, %ebx + andl $3, %ebx + cmpb %bl, %dl + je .Lnopriochange + + /* The priority will change... put SS and ESP on the stack */ + + mov (4*REG_SS)(%eax), %ebx + push %ebx + movl (4*REG_SP)(%eax), %ebx + push %ebx + +.Lnopriochange: + movl (4*REG_EFLAGS)(%eax), %ebx + push %ebx + mov (4*REG_CS)(%eax), %ebx + push %ebx + movl (4*REG_EIP)(%eax), %ebx + push %ebx + + /* Save the value of EAX on the stack too */ + + movl (4*REG_EAX)(%eax), %ebx + push %ebx + + /* Now restore the remaining registers */ + + movl (4*REG_ESI)(%eax), %esi + movl (4*REG_EDI)(%eax), %edi + movl (4*REG_EBP)(%eax), %ebp + movl (4*REG_EBX)(%eax), %ebx + movl (4*REG_EDX)(%eax), %edx + movl (4*REG_ECX)(%eax), %ecx + + /* Restore the data segment register. I think there is an issue that will + * need to be address here at some time: If the register save area is in + * one data segment and the stack is in another, then the above would not + * work (and, conversely, if they are in the same data segment, the + * following is unnecessary and redundant). + */ + + mov (4*REG_DS)(%eax), %ds + + /* Restore the correct value of EAX and then return */ + + popl %eax + iret + .size up_fullcontextrestore, . - up_fullcontextrestore + .end diff --git a/nuttx/arch/x86/src/qemu/qemu_handlers.c b/nuttx/arch/x86/src/qemu/qemu_handlers.c new file mode 100644 index 000000000..a85370f76 --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_handlers.c @@ -0,0 +1,204 @@ +/**************************************************************************** + * arch/x86/src/qemu/qemu_handlers.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <nuttx/arch.h> +#include <arch/io.h> + +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static void idt_outb(uint8_t val, uint16_t addr) __attribute__((noinline)); + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name idt_outb + * + * Description: + * A slightly slower version of outb + * + ****************************************************************************/ + +static void idt_outb(uint8_t val, uint16_t addr) +{ + outb(val, addr); +} + +/**************************************************************************** + * Name: common_handler + * + * Description: + * Common logic for the ISR/IRQ handlers + * + ****************************************************************************/ + +#ifndef CONFIG_SUPPRESS_INTERRUPTS +static uint32_t *common_handler(int irq, uint32_t *regs) +{ + uint32_t *savestate; + + up_ledon(LED_INIRQ); + + /* Nested interrupts are not supported in this implementation. If you want + * implemented nested interrupts, you would have to (1) change the way that + * current regs is handled and (2) the design associated with + * CONFIG_ARCH_INTERRUPTSTACK. + */ + + /* Current regs non-zero indicates that we are processing an interrupt; + * current_regs is also used to manage interrupt level context switches. + */ + + savestate = (uint32_t*)current_regs; + current_regs = regs; + + /* Deliver the IRQ */ + + irq_dispatch(irq, regs); + + /* If a context switch occurred while processing the interrupt then + * current_regs may have change value. If we return any value different + * from the input regs, then the lower level will know that a context + * switch occurred during interrupt processing. + */ + + regs = (uint32_t*)current_regs; + + /* Restore the previous value of current_regs. NULL would indicate that + * we are no longer in an interrupt handler. It will be non-NULL if we + * are returning from a nested interrupt. + */ + + current_regs = savestate; + return regs; +} +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: isr_handler + * + * Description: + * This gets called from ISR vector handling logic in qemu_vectors.S + * + ****************************************************************************/ + +uint32_t *isr_handler(uint32_t *regs) +{ +#ifdef CONFIG_SUPPRESS_INTERRUPTS + up_ledon(LED_INIRQ); + PANIC(OSERR_ERREXCEPTION); /* Doesn't return */ + return regs; /* To keep the compiler happy */ +#else + uint32_t *ret; + + /* Dispatch the interrupt */ + + up_ledon(LED_INIRQ); + ret = common_handler((int)regs[REG_IRQNO], regs); + up_ledoff(LED_INIRQ); + return ret; +#endif +} + +/**************************************************************************** + * Name: isr_handler + * + * Description: + * This gets called from IRQ vector handling logic in qemu_vectors.S + * + ****************************************************************************/ + +uint32_t *irq_handler(uint32_t *regs) +{ +#ifdef CONFIG_SUPPRESS_INTERRUPTS + up_ledon(LED_INIRQ); + PANIC(OSERR_ERREXCEPTION); /* Doesn't return */ + return regs; /* To keep the compiler happy */ +#else + uint32_t *ret; + int irq; + + up_ledon(LED_INIRQ); + + /* Get the IRQ number */ + + irq = (int)regs[REG_IRQNO]; + + /* Send an EOI (end of interrupt) signal to the PICs if this interrupt + * involved the slave. + */ + + if (irq >= IRQ8) + { + /* Send reset signal to slave */ + + idt_outb(PIC_OCW2_EOI_NONSPEC, PIC2_OCW2); + } + + /* Send reset signal to master */ + + idt_outb(PIC_OCW2_EOI_NONSPEC, PIC1_OCW2); + + /* Dispatch the interrupt */ + + ret = common_handler(irq, regs); + up_ledoff(LED_INIRQ); + return ret; +#endif +} + diff --git a/nuttx/arch/x86/src/qemu/qemu_head.S b/nuttx/arch/x86/src/qemu/qemu_head.S new file mode 100755 index 000000000..9933d91ff --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_head.S @@ -0,0 +1,161 @@ +/****************************************************************************
+ * arch/x86/src/qemu/qemu_head.S
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+ .file "qemu_head.S"
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+/* Memory Map: _sbss is the start of the BSS region (see ld.script) _ebss is
+ * the end of the BSS regsion (see ld.script). The idle task stack starts at
+ * the end of BSS and is of size CONFIG_IDLETHREAD_STACKSIZE. The IDLE thread
+ * is the thread that the system boots on and, eventually, becomes the idle,
+ * do nothing task that runs only when there is nothing else to run. The
+ * heap continues from there until the end of memory. See g_heapbase below.
+ */
+
+#define STACKBASE ((_ebss + 0x1f) & 0xffffffe0)
+#define IDLE_STACK (STACKBASE+CONFIG_IDLETHREAD_STACKSIZE)
+#define HEAP_BASE (STACKBASE+CONFIG_IDLETHREAD_STACKSIZE)
+
+/****************************************************************************
+ * Macros
+ ****************************************************************************/
+
+/* Trace macros, use like trace 'i' to print char to serial port. */
+
+ .macro trace, ch
+#ifdef CONFIG_DEBUG
+ mov $0x3f8, %dx
+ mov $\ch, %al
+ out %al, %dx
+#endif
+ .endm
+
+/****************************************************************************
+ * Global Symbols
+ ****************************************************************************/
+
+ .global __start /* Making entry point visible to linker */
+ .global os_start /* os_start is defined elsewhere */
+ .global up_lowsetup /* up_lowsetup is defined elsewhere */
+ .global g_heapbase /* The start of the heap */
+
+/****************************************************************************
+ * .text
+ ****************************************************************************/
+/****************************************************************************
+ * Multiboot Header
+ ****************************************************************************/
+
+ /* Setting up the Multiboot header - see GRUB docs for details */
+
+ .set ALIGN, 1<<0 /* Align loaded modules on page boundaries */
+ .set MEMINFO, 1<<1 /* Provide memory map */
+ .set FLAGS, ALIGN | MEMINFO /* This is the Multiboot 'flag' field */
+ .set MAGIC, 0x1badb002 /* 'magic number' lets bootloader find the header */
+ .set CHECKSUM, -(MAGIC + FLAGS) /* Checksum required */
+
+ .text
+ .align 4
+ .long MAGIC
+ .long FLAGS
+ .long CHECKSUM
+
+/****************************************************************************
+ * Name: Start
+ ****************************************************************************/
+
+ .type __start, @function
+__start:
+ /* Set up the stack */
+
+ mov $(idle_stack + CONFIG_IDLETHREAD_STACKSIZE), %esp
+
+ /* Multiboot setup */
+
+ push %eax /* Multiboot magic number */
+ push %ebx /* Multiboot data structure */
+
+ /* Initialize and start NuttX */
+
+ call up_lowsetup /* Low-level, pre-OS initialization */
+ call os_start /* Start NuttX */
+
+ /* NuttX will not return */
+
+ cli
+hang:
+ hlt /* Halt machine should NuttX return */
+ jmp hang
+ .size __start, . - __start
+
+/****************************************************************************
+ * .bss
+ ****************************************************************************/
+
+/* The stack for the IDLE task thread is declared in .bss. NuttX boots and
+ * initializes on the IDLE thread, then at the completion of OS startup, this
+ * thread becomes the thread that executes when there is nothing else to
+ * do in the system (see up_idle()).
+ */
+
+ .type idle_stack, @object
+ .comm idle_stack, CONFIG_IDLETHREAD_STACKSIZE, 32
+ .size idle_stack, . - idle_stack
+
+/****************************************************************************
+ * .rodata
+ ****************************************************************************/
+
+ .section .rodata, "a"
+
+/* HEAP BASE: _sbss is the start of the BSS region (see ld.script) _ebss is
+ * the end of the BSS region (see ld.script). The heap continues from there
+ * until the end of memory.
+ */
+
+ .type g_heapbase, @object
+g_heapbase:
+ .long _ebss
+ .size g_heapbase, . - g_heapbase
+ .end
diff --git a/nuttx/arch/x86/src/qemu/qemu_idle.c b/nuttx/arch/x86/src/qemu/qemu_idle.c new file mode 100644 index 000000000..42145105b --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_idle.c @@ -0,0 +1,88 @@ +/**************************************************************************** + * arch/x86/src/qemu/qemu_idle.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <nuttx/arch.h> +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_idle + * + * Description: + * up_idle() is the logic that will be executed when their is no other + * ready-to-run task. This is processor idle time and will continue until + * some interrupt occurs to cause a context switch from the idle task. + * + * Processing in this state may be processor-specific. e.g., this is where + * power management operations might be performed. + * + ****************************************************************************/ + +void up_idle(void) +{ +#if defined(CONFIG_SUPPRESS_INTERRUPTS) || defined(CONFIG_SUPPRESS_TIMER_INTS) + /* If the system is idle and there are no timer interrupts, then process + * "fake" timer interrupts. Hopefully, something will wake up. + */ + + sched_process_timer(); +#else + + /* Sleep until an interrupt occurs to save power */ + +#endif +} + diff --git a/nuttx/arch/x86/src/qemu/qemu_internal.h b/nuttx/arch/x86/src/qemu/qemu_internal.h new file mode 100755 index 000000000..c8bd5cd95 --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_internal.h @@ -0,0 +1,448 @@ +/************************************************************************************ + * arch/x86/src/qemu/qemu_internal.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +#ifndef __ARCH_X86_SRC_QEMU_QEMU_INTERNAL_H +#define __ARCH_X86_SRC_QEMU_QEMU_INTERNAL_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/compiler.h> + +#include <sys/types.h> +#include <stdint.h> +#include <stdbool.h> + +#include "up_internal.h" +#include "chip.h" + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/* Configuration ********************************************************************/ + +/************************************************************************************ + * Public Types + ************************************************************************************/ + +/************************************************************************************ + * Inline Functions + ************************************************************************************/ + +#ifndef __ASSEMBLY__ + +/************************************************************************************ + * Public Data + ************************************************************************************/ + +#undef EXTERN +#if defined(__cplusplus) +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +/************************************************************************************ + * Public Function Prototypes + ************************************************************************************/ + +/************************************************************************************ + * Name: i486_clockconfig + * + * Description: + * Called to initialize the LPC17XX. This does whatever setup is needed to put the + * MCU in a usable state. This includes the initialization of clocking using the + * settings in board.h. + * + ************************************************************************************/ + +EXTERN void i486_clockconfig(void); + +/************************************************************************************ + * Name: i486_lowsetup + * + * Description: + * Called at the very beginning of _start. Performs low level initialization + * including setup of the console UART. This UART done early so that the serial + * console is available for debugging very early in the boot sequence. + * + ************************************************************************************/ + +EXTERN void i486_lowsetup(void); + +/************************************************************************************ + * Name: i486_gpioirqinitialize + * + * Description: + * Initialize logic to support a second level of interrupt decoding for GPIO pins. + * + ************************************************************************************/ + +#ifdef CONFIG_GPIO_IRQ +EXTERN void i486_gpioirqinitialize(void); +#else +# define i486_gpioirqinitialize() +#endif + +/************************************************************************************ + * Name: i486_configgpio + * + * Description: + * Configure a GPIO pin based on bit-encoded description of the pin. + * + ************************************************************************************/ + +EXTERN int i486_configgpio(uint16_t cfgset); + +/************************************************************************************ + * Name: i486_gpiowrite + * + * Description: + * Write one or zero to the selected GPIO pin + * + ************************************************************************************/ + +EXTERN void i486_gpiowrite(uint16_t pinset, bool value); + +/************************************************************************************ + * Name: i486_gpioread + * + * Description: + * Read one or zero from the selected GPIO pin + * + ************************************************************************************/ + +EXTERN bool i486_gpioread(uint16_t pinset); + +/************************************************************************************ + * Name: i486_gpioirqenable + * + * Description: + * Enable the interrupt for specified GPIO IRQ + * + ************************************************************************************/ + +#ifdef CONFIG_GPIO_IRQ +EXTERN void i486_gpioirqenable(int irq); +#else +# define i486_gpioirqenable(irq) +#endif + +/************************************************************************************ + * Name: i486_gpioirqdisable + * + * Description: + * Disable the interrupt for specified GPIO IRQ + * + ************************************************************************************/ + +#ifdef CONFIG_GPIO_IRQ +EXTERN void i486_gpioirqdisable(int irq); +#else +# define i486_gpioirqdisable(irq) +#endif + +/************************************************************************************ + * Function: i486_dumpgpio + * + * Description: + * Dump all GPIO registers associated with the base address of the provided pinset. + * + ************************************************************************************/ + +#ifdef CONFIG_DEBUG_GPIO +EXTERN int i486_dumpgpio(uint16_t pinset, const char *msg); +#else +# define i486_dumpgpio(p,m) +#endif + +/************************************************************************************ + * Name: i486_spi/ssp0/ssp1select, i486_spi/ssp0/ssp1status, and + * i486_spi/ssp0/ssp1cmddata + * + * Description: + * These external functions must be provided by board-specific logic. They are + * implementations of the select, status, and cmddata methods of the SPI interface + * defined by struct spi_ops_s (see include/nuttx/spi.h). All other methods + * including up_spiinitialize()) are provided by common LPC17xx logic. To use + * this common SPI logic on your board: + * + * 1. Provide logic in i486_boardinitialize() to configure SPI/SSP chip select + * pins. + * 2. Provide i486_spi/ssp0/ssp1select() and i486_spi/ssp0/ssp1status() functions + * in your board-specific logic. These functions will perform chip selection + * and status operations using GPIOs in the way your board is configured. + * 2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide + * i486_spi/ssp0/ssp1cmddata() functions in your board-specific logic. These + * functions will perform cmd/data selection operations using GPIOs in the way + * your board is configured. + * 3. Add a call to up_spiinitialize() in your low level application + * initialization logic + * 4. The handle returned by up_spiinitialize() may then be used to bind the + * SPI driver to higher level logic (e.g., calling + * mmcsd_spislotinitialize(), for example, will bind the SPI driver to + * the SPI MMC/SD driver). + * + ************************************************************************************/ + +struct spi_dev_s; +enum spi_dev_e; + +#ifdef CONFIG_I486_SPI +EXTERN void i486_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected); +EXTERN uint8_t i486_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid); +#ifdef CONFIG_SPI_CMDDATA +EXTERN int i486_spicmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd); +#endif +#endif + +/**************************************************************************** + * Name: ssp_flush + * + * Description: + * Flush and discard any words left in the RX fifo. This can be called + * from ssp0/1select after a device is deselected (if you worry about such + * things). + * + * Input Parameters: + * dev - Device-specific state data + * + * Returned Value: + * None + * + ****************************************************************************/ + +struct spi_dev_s; +#ifdef CONFIG_I486_SPI +EXTERN void spi_flush(FAR struct spi_dev_s *dev); +#endif +#if defined(CONFIG_I486_SSP0) || defined(CONFIG_I486_SSP1) +EXTERN void ssp_flush(FAR struct spi_dev_s *dev); +#endif + +/**************************************************************************** + * Name: i486_dmainitialize + * + * Description: + * Initialize the GPDMA subsystem. + * + * Returned Value: + * None + * + ****************************************************************************/ + +#ifdef CONFIG_I486_GPDMA +EXTERN void i486_dmainitilaize(void); +#endif + +/**************************************************************************** + * Name: i486_dmachannel + * + * Description: + * Allocate a DMA channel. This function sets aside a DMA channel and + * gives the caller exclusive access to the DMA channel. + * + * Returned Value: + * One success, this function returns a non-NULL, void* DMA channel + * handle. NULL is returned on any failure. This function can fail only + * if no DMA channel is available. + * + ****************************************************************************/ + +#ifdef CONFIG_I486_GPDMA +EXTERN DMA_HANDLE i486_dmachannel(void); +#endif + +/**************************************************************************** + * Name: i486_dmafree + * + * Description: + * Release a DMA channel. NOTE: The 'handle' used in this argument must + * NEVER be used again until i486_dmachannel() is called again to re-gain + * a valid handle. + * + * Returned Value: + * None + * + ****************************************************************************/ + +#ifdef CONFIG_I486_GPDMA +EXTERN void i486_dmafree(DMA_HANDLE handle); +#endif + +/**************************************************************************** + * Name: i486_dmasetup + * + * Description: + * Configure DMA for one transfer. + * + ****************************************************************************/ + +#ifdef CONFIG_I486_GPDMA +EXTERN int i486_dmarxsetup(DMA_HANDLE handle, + uint32_t control, uint32_t config, + uint32_t srcaddr, uint32_t destaddr, + size_t nbytes); +#endif + +/**************************************************************************** + * Name: i486_dmastart + * + * Description: + * Start the DMA transfer + * + ****************************************************************************/ + +#ifdef CONFIG_I486_GPDMA +EXTERN int i486_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg); +#endif + +/**************************************************************************** + * Name: i486_dmastop + * + * Description: + * Cancel the DMA. After i486_dmastop() is called, the DMA channel is + * reset and i486_dmasetup() must be called before i486_dmastart() can be + * called again + * + ****************************************************************************/ + +#ifdef CONFIG_I486_GPDMA +EXTERN void i486_dmastop(DMA_HANDLE handle); +#endif + +/**************************************************************************** + * Name: i486_dmasample + * + * Description: + * Sample DMA register contents + * + ****************************************************************************/ + +#ifdef CONFIG_I486_GPDMA +#ifdef CONFIG_DEBUG_DMA +EXTERN void i486_dmasample(DMA_HANDLE handle, struct i486_dmaregs_s *regs); +#else +# define i486_dmasample(handle,regs) +#endif +#endif + +/**************************************************************************** + * Name: i486_dmadump + * + * Description: + * Dump previously sampled DMA register contents + * + ****************************************************************************/ + +#ifdef CONFIG_I486_GPDMA +#ifdef CONFIG_DEBUG_DMA +EXTERN void i486_dmadump(DMA_HANDLE handle, const struct i486_dmaregs_s *regs, + const char *msg); +#else +# define i486_dmadump(handle,regs,msg) +#endif +#endif + +/**************************************************************************** + * Name: vector_* + * + * Description: + * These are the various ISR/IRQ vector address exported from + * qemu_vectors.S. These addresses need to have global scope so that they + * can be known to the interrupt intialization logic in qemu_irq.c. + * + ****************************************************************************/ + +EXTERN void vector_isr0(void); +EXTERN void vector_isr1(void); +EXTERN void vector_isr2(void); +EXTERN void vector_isr3(void); +EXTERN void vector_isr4(void); +EXTERN void vector_isr5(void); +EXTERN void vector_isr6(void); +EXTERN void vector_isr7(void); +EXTERN void vector_isr8(void); +EXTERN void vector_isr9(void); +EXTERN void vector_isr10(void); +EXTERN void vector_isr11(void); +EXTERN void vector_isr12(void); +EXTERN void vector_isr13(void); +EXTERN void vector_isr14(void); +EXTERN void vector_isr15(void); +EXTERN void vector_isr16(void); +EXTERN void vector_isr17(void); +EXTERN void vector_isr18(void); +EXTERN void vector_isr19(void); +EXTERN void vector_isr20(void); +EXTERN void vector_isr21(void); +EXTERN void vector_isr22(void); +EXTERN void vector_isr23(void); +EXTERN void vector_isr24(void); +EXTERN void vector_isr25(void); +EXTERN void vector_isr26(void); +EXTERN void vector_isr27(void); +EXTERN void vector_isr28(void); +EXTERN void vector_isr29(void); +EXTERN void vector_isr30(void); +EXTERN void vector_isr31(void); +EXTERN void vector_irq0(void); +EXTERN void vector_irq1(void); +EXTERN void vector_irq2(void); +EXTERN void vector_irq3(void); +EXTERN void vector_irq4(void); +EXTERN void vector_irq5(void); +EXTERN void vector_irq6(void); +EXTERN void vector_irq7(void); +EXTERN void vector_irq8(void); +EXTERN void vector_irq9(void); +EXTERN void vector_irq10(void); +EXTERN void vector_irq11(void); +EXTERN void vector_irq12(void); +EXTERN void vector_irq13(void); +EXTERN void vector_irq14(void); +EXTERN void vector_irq15(void); + +#undef EXTERN +#if defined(__cplusplus) +} +#endif + +#endif /* __ASSEMBLY__ */ +#endif /* __ARCH_X86_SRC_QEMU_QEMU_INTERNAL_H */ diff --git a/nuttx/arch/x86/src/qemu/qemu_lowputc.c b/nuttx/arch/x86/src/qemu/qemu_lowputc.c new file mode 100644 index 000000000..1fa4aa6c5 --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_lowputc.c @@ -0,0 +1,104 @@ +/**************************************************************************** + * arch/x86/src/qemu/qemu_lowputc.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <arch/io.h> +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + + /* COM1 port addresses */ + +#define COM1_PORT 0x3f8 /* COM1: I/O port 0x3f8, IRQ 4 */ +#define COM2_PORT 0x2f8 /* COM2: I/O port 0x2f8, IRQ 3 */ +#define COM3_PORT 0x3e8 /* COM3: I/O port 0x3e8, IRQ 4 */ +#define COM4_PORT 0x2e8 /* COM4: I/O port 0x2e8, IRQ 3 */ + +/* 16650 register offsets */ + +#define COM_RBR 0 /* DLAB=0, Receiver Buffer (read) */ +#define COM_THR 0 /* DLAB=0, Transmitter Holding Register (write) */ +#define COM_DLL 0 /* DLAB=1, Divisor Latch (least significant byte) */ +#define COM_IER 1 /* DLAB=0, Interrupt Enable */ +#define COM_DLM 1 /* DLAB=1, Divisor Latch(most significant byte) */ +#define COM_IIR 2 /* Interrupt Identification (read) */ +#define COM_FCR 2 /* FIFO Control (write) */ +#define COM_LCR 3 /* Line Control */ +#define COM_MCR 4 /* MODEM Control */ +#define COM_LSR 5 /* Line Status */ +#define COM_MSR 6 /* MODEM Status */ +#define COM_SCR 7 /* Scratch */ + +/* 16650 register bit definitions */ + +#define LSR_THRE (1 << 5) /* Bit 5: Transmitter Holding Register Empty */ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/************************************************************************** + * Name: up_lowputc + * + * Description: + * Output one byte on the serial console + * + **************************************************************************/ + +void up_lowputc(char ch) +{ + /* Wait until the Transmitter Holding Register (THR) is empty. */ + + while ((inb(COM1_PORT+COM_LSR) & LSR_THRE) == 0); + + /* Then output the character to the THR*/ + + outb(ch, COM1_PORT+COM_THR); +} + diff --git a/nuttx/arch/x86/src/qemu/qemu_lowsetup.c b/nuttx/arch/x86/src/qemu/qemu_lowsetup.c new file mode 100644 index 000000000..20250c33d --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_lowsetup.c @@ -0,0 +1,140 @@ +/**************************************************************************** + * arch/x86/src/qemu/qemu_lowsetup.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <nuttx/arch.h> +#include <arch/board/board.h> + +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static struct gdt_entry_s gdt_entries[5]; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_gdtentry + * + * Description: + * Set the value of one GDT entry. + * + ****************************************************************************/ + +static void up_gdtentry(struct gdt_entry_s *entry, uint32_t base, + uint32_t limit, uint8_t access, uint8_t gran) +{ + entry->lowbase = (base & 0xffff); + entry->midbase = (base >> 16) & 0xff; + entry->hibase = (base >> 24) & 0xff; + + entry->lowlimit = (limit & 0xffff); + entry->granularity = (limit >> 16) & 0x0f; + + entry->granularity |= gran & 0xf0; + entry->access = access; +} + +/**************************************************************************** + * Name: up_gdtinit + * + * Description: + * Initialize the GDT. The Global Descriptor Table or GDT is a data + * structure used by Intel x86-family processors starting with the 80286 + * in order to define the characteristics of the various memory areas used + * during program execution, for example the base address, the size and + * access privileges like executability and writability. These memory areas + * are called segments in Intel terminology. + * + ****************************************************************************/ + +static void up_gdtinit(void) +{ + struct gdt_ptr_s gdt_ptr; + + up_gdtentry(&gdt_entries[0], 0, 0, 0, 0); /* Null segment */ + up_gdtentry(&gdt_entries[1], 0, 0xffffffff, 0x9a, 0xcf); /* Code segment */ + up_gdtentry(&gdt_entries[2], 0, 0xffffffff, 0x92, 0xcf); /* Data segment */ + up_gdtentry(&gdt_entries[3], 0, 0xffffffff, 0xfa, 0xcf); /* User mode code segment */ + up_gdtentry(&gdt_entries[4], 0, 0xffffffff, 0xf2, 0xcf); /* User mode data segment */ + + gdt_ptr.limit = (sizeof(struct gdt_entry_s) * 5) - 1; + gdt_ptr.base = (uint32_t)gdt_entries; + gdt_flush((uint32_t )&gdt_ptr); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_lowsetup + * + * Description: + * Called from qemu_head BEFORE starting the operating system in order + * perform any necessary, early initialization. + * + ****************************************************************************/ + +void up_lowsetup(void) +{ + /* Initialize the Global descriptor table */ + + up_gdtinit(); + + /* Early serial driver initialization */ + +#ifdef CONFIG_USE_EARLYSERIALINIT + up_earlyserialinit(); +#endif + + /* Now perform board-specific initializations */ + + up_boardinitialize(); +} + diff --git a/nuttx/arch/x86/src/qemu/qemu_memorymap.h b/nuttx/arch/x86/src/qemu/qemu_memorymap.h new file mode 100755 index 000000000..571ddd03d --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_memorymap.h @@ -0,0 +1,67 @@ +/************************************************************************************
+ * arch/x86/src/qemu/qemu_memorymap.h
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_X86_SRC_QEMU_QEMU_MEMORYMAP_H
+#define __ARCH_X86_SRC_QEMU_QEMU_MEMORYMAP_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "chip.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* Memory Map ***********************************************************************/
+
+/* Peripheral Base Addresses ********************************************************/
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+#endif /* __ARCH_X86_SRC_QEMU_QEMU_MEMORYMAP_H */
diff --git a/nuttx/arch/x86/src/qemu/qemu_saveusercontext.S b/nuttx/arch/x86/src/qemu/qemu_saveusercontext.S new file mode 100644 index 000000000..427c3bd5d --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_saveusercontext.S @@ -0,0 +1,182 @@ +/************************************************************************** + * arch/x86/src/qemu/up_saveusercontext.S + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + **************************************************************************/ + +/************************************************************************** + * Conditional Compilation Options + **************************************************************************/ + +/************************************************************************** + * Included Files + **************************************************************************/ + +#include <nuttx/config.h> +#include <arch/irq.h> +#include "up_internal.h" + + .file "qemu_saveusercontext.S" + +/************************************************************************** + * Pre-processor Definitions + **************************************************************************/ + +/**************************************************************************** + * Macros + ****************************************************************************/ + +/* Trace macros, use like trace 'i' to print char to serial port. */ + + .macro chout, addr, ch +#ifdef CONFIG_DEBUG + mov $\addr, %dx + mov $\ch, %al + out %al, %dx +#endif + .endm + + .macro trace, ch +#ifdef CONFIG_DEBUG + push %eax + push %edx + chout 0x3f8, \ch + pop %edx + pop %eax +#endif + .endm + +/************************************************************************** + * .text + **************************************************************************/ + + .text + +/************************************************************************** + * Name: up_saveusercontext + * + * Full C prototype: + * int up_saveusercontext(uint32_t *regs); + * + * Description: + * Save the "user" context. It is not necessary to save all of the + * registers because it is acceptable for certain registers to be + * modified upon return from a subroutine call. On a context switch + * back to user mode, it will appear as a return from this function. + * + * According to the Intel ABI, the EAX, EDX, and ECX are to be free for + * use within a procedure or function, and need not be preserved. These + * are the so-called caller-saved registers are EAX, ECX, EDX. + * + * On entry, + * sp points to the return address + * sp+4 points to register save array + * + **************************************************************************/ + + .globl up_saveusercontext + .type up_saveusercontext, @function +up_saveusercontext: + /* Fetch the pointer to the register save array. %eax is a available + * because it must be modified later to provide the return value. + */ + + movl 4(%esp), %eax + + /* %ebx, %esi, %edi, and %ebp must be preserved. We can freely used %eax + * because it will be the return value from this function. + */ + + movl %ebx, (4*REG_EBX)(%eax) + movl %esi, (4*REG_ESI)(%eax) + movl %edi, (4*REG_EDI)(%eax) + + /* Save the segment registers */ + + mov %ss, (4*REG_SS)(%eax) + mov %cs, (4*REG_CS)(%eax) + mov %ds, (4*REG_DS)(%eax) + + /* Save the value of SP as will be at the time of the IRET that will + * appear to be the return from this function. + * + * + * CURRENT STACK IRET STACK + * PRIO CHANGE No PRIO CHANGE + * --------------- --------------- ----------------- + * EIP + * CS ... + * EFLAGS EIP + * -> ESP CS + * ESP->Return address SS EFLAGS + * Argument Argument Argument + * + * NOTE: We don't yet know the value for REG_ESP! That depends upon + * if a priority change occurs or not. + */ + + + leal -4(%esp), %ecx + movl %ecx, (4*REG_SP)(%eax) + + /* Fetch the PC from the stack and save it in the save block */ + + movl 0(%esp), %ecx + movl %ecx, (4*REG_EIP)(%eax) + + /* Save the framepointer */ + + movl %ebp, (4*REG_EBP)(%eax) + + /* Save EAX=1. This will be the "apparent" return value from this + * function when context is switch back to this thread. The non-zero + * return value is the indication that we have been resumed. + */ + + movl $1, (4*REG_EAX)(%eax) + + /* Get and save the interrupt state */ + + pushf + pop %ecx + movl %ecx, (4*REG_EFLAGS)(%eax) + + /* And return 0 -- The zero return value is the indication that that + * this is the original, "true" return from the function. + * + * 'ret' will remove the EIP from the top of the stack. + */ + + xorl %eax, %eax + ret + .size up_saveusercontext, . - up_saveusercontext + .end diff --git a/nuttx/arch/x86/src/qemu/qemu_serial.c b/nuttx/arch/x86/src/qemu/qemu_serial.c new file mode 100644 index 000000000..527ca0c05 --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_serial.c @@ -0,0 +1,116 @@ +/**************************************************************************** + * arch/x86/src/qemu/qemu_serial.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <nuttx/arch.h> +#include <nuttx/uart_16550.h> + +#include <arch/io.h> + +#include "up_internal.h" + +/* This is a "stub" file to suppport up_putc if no real serial driver is + * configured. Normally, drivers/serial/uart_16550.c provides the serial + * driver for this platform. + */ + +#ifdef CONFIG_USE_SERIALDRIVER + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: uart_getreg(), uart_putreg() + * + * Description: + * These functions must be provided by the processor-specific code in order + * to correctly access 16550 registers + * + ****************************************************************************/ + +uart_datawidth_t uart_getreg(uart_addrwidth_t base, unsigned int offset) +{ + return inb(base + offset); +} + +void uart_putreg(uart_addrwidth_t base, unsigned int offset, uart_datawidth_t value) +{ + outb(value, base + offset); +} + +#else /* CONFIG_USE_SERIALDRIVER */ + +/**************************************************************************** + * Name: up_putc + * + * Description: + * Provide priority, low-level access to support OS debug writes + * + ****************************************************************************/ + +int up_putc(int ch) +{ + /* Check for LF */ + + if (ch == '\n') + { + /* Add CR */ + + up_lowputc('\r'); + } + + up_lowputc(ch); + return ch; +} + +#endif /* CONFIG_USE_SERIALDRIVER */ diff --git a/nuttx/arch/x86/src/qemu/qemu_timerisr.c b/nuttx/arch/x86/src/qemu/qemu_timerisr.c new file mode 100755 index 000000000..531b7d09d --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_timerisr.c @@ -0,0 +1,148 @@ +/**************************************************************************** + * arch/x86/src/qemu/qemu_timerisr.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Based on Bran's kernel development tutorials. Rewritten for JamesM's + * kernel development tutorials. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <time.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <arch/irq.h> +#include <arch/io.h> +#include <arch/board/board.h> + +#include "clock_internal.h" +#include "up_internal.h" +#include "up_arch.h" + +#include "chip.h" +#include "qemu_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Programmable interval timer (PIT) + * + * Fpit = Fin / divisor + * divisor = Fin / divisor + * + * Where: + * + * Fpit = The desired interrupt frequency. + * Fin = PIT input frequency (PIT_CLOCK provided in board.h) + * + * The desired timer interrupt frequency is provided by the definition CLK_TCK + * (see include/time.h). CLK_TCK defines the desired number of system clock + * ticks per second. That value is a user configurable setting that defaults + * to 100 (100 ticks per second = 10 MS interval). + */ + +#define PIT_DIVISOR ((uint32_t)PIT_CLOCK/(uint32_t)CLK_TCK) + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: up_timerisr + * + * Description: + * The timer ISR will perform a variety of services for various portions + * of the systems. + * + ****************************************************************************/ + +static int up_timerisr(int irq, uint32_t *regs) +{ + /* Process timer interrupt */ + + sched_process_timer(); + return 0; +} + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: up_timerinit + * + * Description: + * This function is called during start-up to initialize + * the timer interrupt. + * + ****************************************************************************/ + +void up_timerinit(void) +{ + /* uint32_t to avoid compile time overflow errors */ + + uint32_t divisor = PIT_DIVISOR; + DEBUGASSERT(divisor <= 0xffff); + + /* Attach to the timer interrupt handler */ + + (void)irq_attach(IRQ0, (xcpt_t)up_timerisr); + + /* Send the command byte to configure counter 0 */ + + outb(PIT_OCW_MODE_SQUARE|PIT_OCW_RL_DATA|PIT_OCW_COUNTER_0, PIT_REG_COMMAND); + + /* Set the PIT input frequency divisor */ + + outb((uint8_t)(divisor & 0xff), PIT_REG_COUNTER0); + outb((uint8_t)((divisor >> 8) & 0xff), PIT_REG_COUNTER0); + + /* And enable IRQ0 */ + + up_enable_irq(IRQ0); +} diff --git a/nuttx/arch/x86/src/qemu/qemu_vectors.S b/nuttx/arch/x86/src/qemu/qemu_vectors.S new file mode 100755 index 000000000..d6e17e57b --- /dev/null +++ b/nuttx/arch/x86/src/qemu/qemu_vectors.S @@ -0,0 +1,271 @@ +/**************************************************************************** + * arch/x86/src/qemu/qemu_head.S + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Based on Bran's kernel development tutorials. Rewritten for JamesM's + * kernel development tutorials. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <arch/irq.h> + + .file "qemu_vectors.S" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +#define KSEG 0x10 + +/**************************************************************************** + * .text + ****************************************************************************/ + + .text + +/**************************************************************************** + * Globals + ****************************************************************************/ + + .globl irq_handler + .globl isr_handler + +/**************************************************************************** + * Macros + ****************************************************************************/ + +/* Trace macros, use like trace 'i' to print char to serial port. */ + + .macro trace, ch + mov $0x3f8, %dx + mov $\ch, %al + out %al, %dx + .endm + +/* This macro creates a stub for an ISR which does NOT pass it's own + * error code (adds a dummy errcode byte). + */ + + .macro ISR_NOERRCODE, intno + .globl vector_isr\intno +vector_isr\intno: + cli /* Disable interrupts firstly. */ + push $0 /* Push a dummy error code. */ + push $\intno /* Push the interrupt number. */ + jmp isr_common /* Go to the common ISR handler code. */ + .endm + +/* This macro creates a stub for an ISR which passes it's own + * error code. + */ + + .macro ISR_ERRCODE, intno + .globl vector_isr\intno +vector_isr\intno: + cli /* Disable interrupts firstly. */ + push $\intno /* Push the interrupt number. */ + jmp isr_common /* Go to the common ISR handler code. */ + .endm + +/* This macro creates a stub for an IRQ - the first parameter is + * the IRQ number, the second is the ISR number it is remapped to. + */ + + .macro IRQ, irqno, intno + .globl vector_irq\irqno +vector_irq\irqno: + cli /* Disable interrupts firstly. */ + push $0 /* Push a dummy error code. */ + push $\intno /* Push the interrupt number. */ + jmp irq_common /* Go to the common IRQ handler code. */ + .endm + +/**************************************************************************** + * IDT Vectors + ****************************************************************************/ +/* The following will be the vector addresses programmed into the IDT */ + + ISR_NOERRCODE ISR0 + ISR_NOERRCODE ISR1 + ISR_NOERRCODE ISR2 + ISR_NOERRCODE ISR3 + ISR_NOERRCODE ISR4 + ISR_NOERRCODE ISR5 + ISR_NOERRCODE ISR6 + ISR_NOERRCODE ISR7 + ISR_ERRCODE ISR8 + ISR_NOERRCODE ISR9 + ISR_ERRCODE ISR10 + ISR_ERRCODE ISR11 + ISR_ERRCODE ISR12 + ISR_ERRCODE ISR13 + ISR_ERRCODE ISR14 + ISR_NOERRCODE ISR15 + ISR_NOERRCODE ISR16 + ISR_NOERRCODE ISR17 + ISR_NOERRCODE ISR18 + ISR_NOERRCODE ISR19 + ISR_NOERRCODE ISR20 + ISR_NOERRCODE ISR21 + ISR_NOERRCODE ISR22 + ISR_NOERRCODE ISR23 + ISR_NOERRCODE ISR24 + ISR_NOERRCODE ISR25 + ISR_NOERRCODE ISR26 + ISR_NOERRCODE ISR27 + ISR_NOERRCODE ISR28 + ISR_NOERRCODE ISR29 + ISR_NOERRCODE ISR30 + ISR_NOERRCODE ISR31 + IRQ 0, IRQ0 + IRQ 1, IRQ1 + IRQ 2, IRQ2 + IRQ 3, IRQ3 + IRQ 4, IRQ4 + IRQ 5, IRQ5 + IRQ 6, IRQ6 + IRQ 7, IRQ7 + IRQ 8, IRQ8 + IRQ 9, IRQ9 + IRQ 10, IRQ10 + IRQ 11, IRQ11 + IRQ 12, IRQ12 + IRQ 13, IRQ13 + IRQ 14, IRQ14 + IRQ 15, IRQ15 + +/**************************************************************************** + * Name: isr_common + * + * Description: + * This is the common ISR logic. It saves the processor state, sets up for + * kernel mode segments, calls the C-level fault handler, and finally + * restores the stack frame. + * + ****************************************************************************/ + + .type isr_common, @function +isr_common: +/* trace 'S' */ + pusha /* Pushes edi,esi,ebp,esp,ebx,edx,ecx,eax */ + + mov %ds, %ax /* Lower 16-bits of eax = ds. */ + pushl %eax /* Save the data segment descriptor */ + + mov $KSEG, %ax /* Load the kernel data segment descriptor */ + mov %ax, %ds + mov %ax, %es + mov %ax, %fs + mov %ax, %gs + + /* The current value of the SP points to the beginning of the state save + * structure. Save that on the stack as the input parameter to isr_handler. + */ + + mov %esp, %eax + push %eax + call isr_handler + jmp .Lreturn + .size isr_common, . - isr_common + +/**************************************************************************** + * Name: irq_common + * + * Description: + * This is the common IRQ logic. It saves the processor state, sets up for + * kernel mode segments, calls the C-level fault handler, and finally + * restores the stack frame. + * + ****************************************************************************/ + + .type irq_common, @function +irq_common: +/* trace 'R' */ + pusha /* Pushes edi,esi,ebp,esp,ebx,edx,ecx,eax */ + + mov %ds, %ax /* Lower 16-bits of eax = ds. */ + push %eax /* Save the data segment descriptor */ + + mov $KSEG, %ax /* Load the kernel data segment descriptor */ + mov %ax, %ds + mov %ax, %es + mov %ax, %fs + mov %ax, %gs + + /* The current value of the SP points to the beginning of the state save + * structure. Save that on the stack as the input parameter to irq_handler. + */ + + mov %esp, %eax + push %eax + call irq_handler + + /* The common return point for both isr_handler and irq_handler */ + +.Lreturn: + add $4, %esp + + /* EAX may possibly hold a pointer to a different regiser save area on + * return. Are we switching to a new context? + */ + + cmp %eax, %esp + je .Lnoswitch + + /* A context swith will be performed. EAX holds the address of the new + * register save structure. + * + * Jump to up_fullcontextrestore(). We perform a call here, but that function + * never returns. The address of the new register save block is the argument + * to the up_fullcontextrestore(). + */ + + push %eax + call up_fullcontextrestore + +.Lnoswitch: + pop %ebx /* Reload the original data segment descriptor */ + mov %bx, %ds + mov %bx, %es + mov %bx, %fs + mov %bx, %gs + + popa /* Pops edi,esi,ebp... */ + add $8, %esp /* Cleans up the pushed error code and pushed ISR number */ + iret /* Pops 3-5 things at once: CS, EIP, EFLAGS (and maybe SS and ESP) */ + .size irq_common, . - irq_common + .end |