diff options
Diffstat (limited to 'nuttx/arch/z80')
37 files changed, 4360 insertions, 0 deletions
diff --git a/nuttx/arch/z80/include/arch.h b/nuttx/arch/z80/include/arch.h new file mode 100644 index 000000000..ff3a059e0 --- /dev/null +++ b/nuttx/arch/z80/include/arch.h @@ -0,0 +1,82 @@ +/**************************************************************************** + * arch/arch.h + * + * Copyright (C) 2007, 2008 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_ARCH_H +#define __ARCH_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <arch/chip/arch.h> + +/**************************************************************************** + * 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_ARCH_H */ + diff --git a/nuttx/arch/z80/include/irq.h b/nuttx/arch/z80/include/irq.h new file mode 100644 index 000000000..6ef0188ac --- /dev/null +++ b/nuttx/arch/z80/include/irq.h @@ -0,0 +1,81 @@ +/**************************************************************************** + * arch/irq.h + * + * Copyright (C) 2007, 2008 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_IRQ_H +#define __ARCH_IRQ_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/irq.h> +#include <arch/chip/irq.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * 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_IRQ_H */ + diff --git a/nuttx/arch/z80/include/limits.h b/nuttx/arch/z80/include/limits.h new file mode 100644 index 000000000..31a94a547 --- /dev/null +++ b/nuttx/arch/z80/include/limits.h @@ -0,0 +1,71 @@ +/**************************************************************************** + * arch/limits.h + * + * Copyright (C) 2007, 2008 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_LIMITS_H +#define __ARCH_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 0x8000 +#define INT_MAX 0x7fff +#define UINT_MAX 0xffff + +/* These change on 32-bit and 64-bit platforms */ + +#define LONG_MAX 0x80000000 +#define LONG_MIN 0x7fffffff +#define ULONG_MAX 0xffffffff + +#endif /* __ARCH_LIMITS_H */ diff --git a/nuttx/arch/z80/include/serial.h b/nuttx/arch/z80/include/serial.h new file mode 100644 index 000000000..dc3c4948b --- /dev/null +++ b/nuttx/arch/z80/include/serial.h @@ -0,0 +1,61 @@ +/**************************************************************************** + * arch/serial.h + * + * Copyright (C) 2007, 2008 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_SERIAL_H +#define __ARCH_SERIAL_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* IOCTL commands supported by the z80 serial driver */ + +#define TIOCSBRK 0x5401 /* BSD compatibility */ +#define TIOCCBRK 0x5402 /* " " " " */ +#define TIOCSERGSTRUCT 0x5403 /* Get up_dev_t for port */ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +#endif /* __ARCH_SERIAL_H */ diff --git a/nuttx/arch/z80/include/types.h b/nuttx/arch/z80/include/types.h new file mode 100644 index 000000000..d650e5a01 --- /dev/null +++ b/nuttx/arch/z80/include/types.h @@ -0,0 +1,87 @@ +/**************************************************************************** + * arch/types.h + * + * Copyright (C) 2007, 2008 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 Gregory Nutt 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_TYPES_H +#define __ARCH_TYPES_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Type Declarations + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* These are the sizes of the standard SDCC types + * + * For SDCC, sizeof(int) is 16 and sizeof(long) is 32. + * long long and double are not supported. + * + * Generic pointers are 3 bytes in length with the the + * first byte holding data space intformation. + */ + +typedef char sbyte; +typedef unsigned char ubyte; +typedef unsigned char uint8; +typedef unsigned char boolean; +typedef int sint16; +typedef unsigned int uint16; +typedef long sint32; +typedef unsigned long uint32; + +/* This is the size of the interrupt state save returned by + * irqsave() + */ + +typedef unsigned char irqstate_t; + +#endif /* __ASSEMBLY__ */ + +/**************************************************************************** + * Global Function Prototypes + ****************************************************************************/ + +#endif /* __ARCH_TYPES_H */ diff --git a/nuttx/arch/z80/include/z80/arch.h b/nuttx/arch/z80/include/z80/arch.h new file mode 100644 index 000000000..e9033596c --- /dev/null +++ b/nuttx/arch/z80/include/z80/arch.h @@ -0,0 +1,77 @@ +/**************************************************************************** + * arch/z80/arch.h + * arch/chip/arch.h + * + * Copyright (C) 2007, 2008 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 (via arch/arch.h) + */ + +#ifndef __ARCH_Z80_ARCH_H +#define __ARCH_Z80_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * 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_Z80_ARCH_H */ + diff --git a/nuttx/arch/z80/include/z80/irq.h b/nuttx/arch/z80/include/z80/irq.h new file mode 100644 index 000000000..c68dd76f9 --- /dev/null +++ b/nuttx/arch/z80/include/z80/irq.h @@ -0,0 +1,133 @@ +/**************************************************************************** + * arch/z80/irq.h + * arch/chip/irq.h + * + * Copyright (C) 2007, 2008 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 (via arch/irq.h) + */ + +#ifndef __ARCH_Z80_IRQ_H +#define __ARCH_Z80_IRQ_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* Z80 Interrupts */ + +#define Z80_IRQ_SYSTIMER (1) +#define NR_IRQS (1) + +/* IRQ Stack Frame Format + * + * This stack frame is created on each interrupt. These registers are stored + * in the TCB to many context switches. + */ + +#define XCPT_I (0) /* Saved I w/interrupt state in carry */ +#define XCPT_AF (1) /* Saved AF register */ +#define XCPT_BC (2) /* Saved BC register */ +#define XCPT_DE (3) /* Saved DE register */ +#define XCPT_HL (4) /* Saved HL register */ +#define XCPT_IX (5) /* Saved IX register */ +#define XCPT_IY (6) /* Saved IY register */ +#define XCPT_SP (7) /* Offset to SP at time of interrupt */ +#define XCPT_PC (8) /* Offset to PC at time of interrupt */ + +#define XCPTCONTEXT_REGS (9) +#define XCPTCONTEXT_SIZE (2 * XCPTCONTEXT_REGS) + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/* This is the the type of the register save array */ + +typedef uint16 chipreg_t; + +/* This struct defines the way the registers are stored. */ + +#ifndef __ASSEMBLY__ +struct xcptcontext +{ + /* Register save area */ + + uint16 regs[XCPTCONTEXT_REGS]; + + /* 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 */ +#endif +}; +#endif + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +EXTERN irqstate_t irqsave(void); +EXTERN void irqrestore(irqstate_t flags); + +#undef EXTERN +#ifdef __cplusplus +} +#endif +#endif + +#endif /* __ARCH_Z80_IRQ_H */ + diff --git a/nuttx/arch/z80/src/Makefile b/nuttx/arch/z80/src/Makefile new file mode 100644 index 000000000..0aabc09bb --- /dev/null +++ b/nuttx/arch/z80/src/Makefile @@ -0,0 +1,220 @@ +############################################################################ +# arch/z80/src/Makefile +# +# Copyright (C) 2007, 2008 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. +# +############################################################################ + +############################################################################ +# Makefile fragments + +-include $(TOPDIR)/Make.defs +-include chip/Make.defs + +############################################################################ +# Tools + +MKDEP = $(TOPDIR)/tools/mkdeps.sh + +CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(TOPDIR)/sched +LDFLAGS = $(ARCHSCRIPT) + +LDPATHES = $(addprefix -L$(TOPDIR)/,$(dir $(LINKLIBS))) +LDLIBS = $(patsubst lib%,-l%,$(basename $(notdir $(LINKLIBS)))) + +CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) -D__ASSEMBLY__ + +############################################################################ +# Files and directories + +# There should be one head source (.asm file) + +HEAD_AOBJ = $(HEAD_ASRC:$(ASMEXT)=$(OBJEXT)) + +# Assembly sources and objects + +ASRCS = $(CHIP_ASRCS) $(CMN_ASRCS) +AOBJS = $(ASRCS:.S=$(OBJEXT)) + +# C sources and objects + +CSRCS = $(CHIP_CSRCS) $(CMN_CSRCS) +COBJS = $(CSRCS:.c=$(OBJEXT)) + +# All sources and objcts + +SRCS = $(ASRCS) $(CSRCS) +OBJS = $(AOBJS) $(COBJS) + +# Sources and objects for the test target (plus HEAD_AOBJ + +TEST_AOBJS = $(TEST_ASRCS:$(ASMEXT)=$(OBJEXT)) +TEST_COBJS = $(TEST_CSRCS:.c=$(OBJEXT)) + +TESTSRCS = up_irqtest.c +TESTOBJS = $(TESTSRCS:.c=$(OBJEXT)) +TESTEXTRAOBJS = up_savecontext$(OBJEXT) up_restorecontext$(OBJEXT) + +# Sources that can have dependencies (no .asm files) + +DEPSRCS = $(SRCS) + +# Directories + +ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src +BOARDDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src/board + +VPATH = chip:common + +# Libraries + +LIBGCC = ${shell $(CC) -print-libgcc-file-name} + +# Supports dynamic sizing of HEAP + +HEAP_BASE = ${shell \ + if [ -e pass1.mem ]; then \ + cat pass1.mem | grep "ROM/EPROM/FLASH" | \ + sed -e "s/[ ][ ]*/ /g" | cut -d' ' -f4 ; \ + else \ + echo $(DEF_HEAP_BASE) ; \ + fi \ + } + +STACK_BASE = ${shell \ + if [ -e pass1.mem ]; then \ + cat pass1.mem | grep "Stack starts" | \ + cut -d' ' -f4 ; \ + else \ + echo $(DEF_STACK_BASE) ; \ + fi \ + } + +############################################################################ +# Targets + +all: $(HEAD_AOBJ) libarch$(LIBEXT) + +$(AOBJS) $(HEAD_AOBJ) $(TEST_AOBJS): %$(OBJEXT): %$(ASMEXT) + $(AS) $(ASFLAGS) $@ $< + +$(COBJS) $(TEST_COBJS): %$(OBJEXT): %.c + $(CC) -c $(CFLAGS) $< -o $@ + +# Create a header file that contains addressing information needed by the code + +pass1.mem: + +up_mem.h: pass1.mem + @echo "#ifndef __ARCH_MEM_H" >up_mem.h + @echo "#define __ARCH_MEM_H" >>up_mem.h + @echo "" >>up_mem.h + @echo "#define UP_DEFAULT_STACK_BASE $(DEF_STACK_BASE)" >>up_mem.h + @echo "#define UP_DEFAULT_HEAP_BASE $(DEF_HEAP_BASE)" >> up_mem.h + @echo "" >>up_mem.h + @echo "#define UP_STACK_BASE $(STACK_BASE)" >>up_mem.h + @echo "#if UP_STACK_BASE > UP_DEFAULT_STACK_BASE" >>up_mem.h + @echo "# error \"Stack overlap: $(DEF_STACK_BASE) < $(STACK_BASE)\"" >>up_mem.h + @echo "#elif UP_STACK_BASE < UP_DEFAULT_STACK_BASE" >>up_mem.h + @echo "# warning \"Wasted stack: $(DEF_STACK_BASE) > $(STACK_BASE)\"" >>up_mem.h + @echo "#endif" >>up_mem.h + @echo "" >>up_mem.h + @echo "#define UP_HEAP_BASE $(HEAP_BASE)" >> up_mem.h + @echo "#define UP_HEAP_END $(CONFIG_DRAM_END)" >> up_mem.h + @echo "" >>up_mem.h + @echo "#endif /* __ARCH_MEM_H */" >>up_mem.h + +# Combine all objects in this directory into a library + +libarch$(LIBEXT): up_mem.h $(OBJS) + @( for obj in $(OBJS) ; do \ + $(AR) $@ $${obj} || \ + { echo "$(AR) $@ $${obj} FAILED!" ; exit 1 ; } ; \ + done ; ) + +# This builds the libboard library in the board/ subdirectory + +board/libboard$(LIBEXT): + $(MAKE) -C board TOPDIR=$(TOPDIR) libboard$(LIBEXT) + +# This target builds the final executable + +pass1.ihx: up_mem.h $(HEAD_AOBJ) board/libboard$(LIBEXT) + $(CC) $(LDFLAGS) -L$(BOARDDIR) $(SDCCPATH) $(HEAD_AOBJ) \ + -llibboard$(LIBEXT) $(SDCCLIBS) -o $@ + @rm -f up_mem.h + @rm -f up_allocateheap$(OBJEXT) libarch$(LIBEXT) + @$(MAKE) TOPDIR=$(TOPDIR) libarch$(LIBEXT) + +nuttx.ihx: up_mem.h $(HEAD_AOBJ) + $(CC) $(LDFLAGS) -L$(BOARDDIR) $(SDCCPATH) $(HEAD_AOBJ) \ + -llibboard$(LIBEXT) $(SDCCLIBS) -o $@ + +nuttx$(EXEEXT): pass1.ihx nuttx.ihx + @rm -f pass1.* + packihx nuttx.ihx > $(TOPDIR)/nuttx$(EXEEXT) + @cp -f nuttx.map $(TOPDIR)/. + +# This target builds a test program to verify interrupt context switching. irqtest is +# a PHONY target that just sets upt the up_irqtest build correctly + +up_irqtest.ihx: $(TEST_COBJS) + $(CC) $(LDFLAGS) -L. $(SDCCPATH) $(HEAD_AOBJ) $(TEST_COBJS) $(TESTEXTRAOBJS) $(SDCCLIBS) -o $@ + +irqtest: + $(MAKE) TOPDIR=../../.. up_irqtest.ihx + +# Build dependencies + +.depend: Makefile up_mem.h chip/Make.defs $(DEPSRCS) + @if [ -e board/Makefile ]; then \ + $(MAKE) -C board TOPDIR=$(TOPDIR) depend ; \ + fi + $(MKDEP) --dep-path chip --dep-path common $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep + @touch $@ + +depend: .depend + +clean: + @if [ -e board/Makefile ]; then \ + $(MAKE) -C board TOPDIR=$(TOPDIR) clean ; \ + fi + rm -f libarch$(LIBEXT) up_mem.h + rm -f *.asm *.rel *.lst *.rst *.sym *.adb *.lnk *.map *.mem *.ihx *.hex *~ + if [ ! -z "$(OBJEXT)" ]; then rm -f *$(OBJEXT); fi + +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/z80/src/common/up_allocateheap.c b/nuttx/arch/z80/src/common/up_allocateheap.c new file mode 100644 index 000000000..04e5f2d99 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_allocateheap.c @@ -0,0 +1,79 @@ +/**************************************************************************** + * common/up_allocateheap.c + * + * Copyright (C) 2007, 2008 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 "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 = (void*)(CONFIG_DRAM_SIZE - CONFIG_HEAP_SIZE); + *heap_size = CONFIG_HEAP_SIZE; +} diff --git a/nuttx/arch/z80/src/common/up_arch.h b/nuttx/arch/z80/src/common/up_arch.h new file mode 100644 index 000000000..b0158325a --- /dev/null +++ b/nuttx/arch/z80/src/common/up_arch.h @@ -0,0 +1,70 @@ +/************************************************************************************ + * common/up_arch.h + * + * Copyright (C) 2007 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 Gregory Nutt 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 __UP_ARCH_H +#define __UP_ARCH_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> +#ifndef __ASSEMBLY__ +# include <sys/types.h> +#endif + +#include <arch/board/board.h> +#include "chip.h" + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/************************************************************************************ + * Inline Functions + ************************************************************************************/ + +#ifndef __ASSEMBLY__ + +# define getreg8(a) (*(volatile ubyte *)(a)) +# define putreg8(v,a) (*(volatile ubyte *)(a) = (v)) +# define getreg32(a) (*(volatile uint32 *)(a)) +# define putreg32(v,a) (*(volatile uint32 *)(a) = (v)) +# define getreg(a) getreg16(1) +# define putreg(v,a) putreg16(v,a) + +#endif + +#endif /* __UP_ARCH_H */ diff --git a/nuttx/arch/z80/src/common/up_assert.c b/nuttx/arch/z80/src/common/up_assert.c new file mode 100644 index 000000000..f226c9431 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_assert.c @@ -0,0 +1,156 @@ +/**************************************************************************** + * common/up_assert.c + * + * Copyright (C) 2007, 2008 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 <stdlib.h> +#include <assert.h> +#include <debug.h> + +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include <chip/chip.h> + +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" +#include "up_mem.h" + +/**************************************************************************** + * 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 + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: _up_assert + ****************************************************************************/ + +static void _up_assert(int errorcode) /* __attribute__ ((noreturn)) */ +{ + /* Are we in an interrupt handler or the idle task? */ + + if (up_interrupt_context() || ((FAR _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 ubyte *filename, int lineno) +{ +#if CONFIG_TASK_NAME_SIZE > 0 + _TCB *rtcb = (_TCB*)g_readytorun.head; +#endif + + up_ledon(LED_ASSERTION); + +#if CONFIG_TASK_NAME_SIZE > 0 + 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_stackdump(); + up_registerdump(); + _up_assert(EXIT_FAILURE); +} + +/**************************************************************************** + * Name: up_assert_code + ****************************************************************************/ + +void up_assert_code(const ubyte *filename, int lineno, int errorcode) +{ +#if CONFIG_TASK_NAME_SIZE > 0 + _TCB *rtcb = (_TCB*)g_readytorun.head; +#endif + + up_ledon(LED_ASSERTION); + +#if CONFIG_TASK_NAME_SIZE > 0 + 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_stackdump(); + up_registerdump(); + _up_assert(errorcode); +} diff --git a/nuttx/arch/z80/src/common/up_blocktask.c b/nuttx/arch/z80/src/common/up_blocktask.c new file mode 100644 index 000000000..b2d014bca --- /dev/null +++ b/nuttx/arch/z80/src/common/up_blocktask.c @@ -0,0 +1,173 @@ +/**************************************************************************** + * common/up_blocktask.c + * + * Copyright (C) 2007, 2008 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 <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Funtions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * 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 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(FAR _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 + { + FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head; + boolean switch_needed; + + /* dbg("Blocking TCB=%p\n", tcb); */ + + /* 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 (IN_INTERRUPT) + { + /* Yes, then we have to do things differently. + * Just copy the current registers into the OLD rtcb. + */ + + SAVE_IRQCONTEXT(rtcb); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + /* dbg("New Active Task TCB=%p\n", rtcb); */ + + /* Then setup so that the context will be performed on exit + * from the interrupt. + */ + + SET_IRQCONTEXT(rtcb); + } + + /* Copy the user C context into the TCB at the (old) head of the + * g_readytorun Task list. if SAVE_USERCONTEXT returns a non-zero + * value, then this is really the previously running task restarting! + */ + + else if (!SAVE_USERCONTEXT(rtcb)) + { + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + /* dbg("New Active Task TCB=%p\n", rtcb); */ + + /* Then switch contexts */ + + RESTORE_USERCONTEXT(rtcb); + } + } + } +} diff --git a/nuttx/arch/z80/src/common/up_copystate.c b/nuttx/arch/z80/src/common/up_copystate.c new file mode 100644 index 000000000..8a4915181 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_copystate.c @@ -0,0 +1,78 @@ +/**************************************************************************** + * common/up_copystate.c + * + * Copyright (C) 2007, 2008 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 <arch/irq.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_undefinedinsn + ****************************************************************************/ + +/* Maybe a little faster than most memcpy's */ + +void up_copystate(FAR chipreg_t *dest, FAR const chipreg_t *src) +{ + int i; + for (i = 0; i < XCPTCONTEXT_REGS; i++) + { + *dest++ = *src++; + } +} + diff --git a/nuttx/arch/z80/src/common/up_createstack.c b/nuttx/arch/z80/src/common/up_createstack.c new file mode 100644 index 000000000..dc3f715c9 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_createstack.c @@ -0,0 +1,128 @@ +/**************************************************************************** + * common/up_createstack.c + * + * Copyright (C) 2007, 2008 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 <sched.h> +#include <debug.h> +#include <nuttx/kmalloc.h> +#include <nuttx/arch.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. + ****************************************************************************/ + +STATUS 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) + { + tcb->stack_alloc_ptr = (uint32 *)kzmalloc(stack_size); + } + + if (tcb->stack_alloc_ptr) + { + size_t top_of_stack; + size_t size_of_stack; + + /* The Arm7Tdmi 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)tcb->stack_alloc_ptr + stack_size - 4; + + /* The Arm7Tdmi 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)tcb->stack_alloc_ptr + 4; + + /* Save the adjusted stack values in the _TCB */ + + tcb->adj_stack_ptr = (uint32*)top_of_stack; + tcb->adj_stack_size = size_of_stack; + + up_ledon(LED_STACKCREATED); + return OK; + } + + return ERROR; +} diff --git a/nuttx/arch/z80/src/common/up_doirq.c b/nuttx/arch/z80/src/common/up_doirq.c new file mode 100644 index 000000000..d21cefabb --- /dev/null +++ b/nuttx/arch/z80/src/common/up_doirq.c @@ -0,0 +1,104 @@ +/**************************************************************************** + * common/up_doirq.c + * + * Copyright (C) 2007, 2008 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/irq.h> +#include <nuttx/arch.h> +#include <assert.h> +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +void up_doirq(int irq, chipreg_t *regs) +{ + up_ledon(LED_INIRQ); +#ifdef CONFIG_SUPPRESS_INTERRUPTS + PANIC(OSERR_ERREXCEPTION); +#else + if ((unsigned)irq < NR_IRQS) + { + /* Current regs non-zero indicates that we are processing + * an interrupt; current_regs is also used to manage + * interrupt level context switches. + */ + + current_regs = regs; + + /* Mask and acknowledge the interrupt */ + + up_maskack_irq(irq); + + /* Deliver the IRQ */ + + irq_dispatch(irq, regs); + + /* Indicate that we are no long in an interrupt handler */ + + current_regs = NULL; + + /* Unmask the last interrupt (global interrupts are still + * disabled. + */ + + up_enable_irq(irq); + } + up_ledoff(LED_INIRQ); +#endif +} diff --git a/nuttx/arch/z80/src/common/up_exit.c b/nuttx/arch/z80/src/common/up_exit.c new file mode 100644 index 000000000..8784f2f78 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_exit.c @@ -0,0 +1,200 @@ +/**************************************************************************** + * common/up_exit.c + * + * Copyright (C) 2007, 2008 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 <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <chip/chip.h> + +#include "os_internal.h" +#include "up_internal.h" + +#ifdef CONFIG_DUMP_ON_EXIT +#include <nuttx/fs.h> +#endif + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Funtions + ****************************************************************************/ + +/**************************************************************************** + * 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 + + dbg(" TCB=%p name=%s\n", tcb, tcb->argv[0]); + +#if CONFIG_NFILE_DESCRIPTORS > 0 + if (tcb->filelist) + { + lldbg(" 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) + { + lldbg(" fd=%d refcount=%d\n", + i, inode->i_crefs); + } + } + } +#endif + +#if CONFIG_NFILE_STREAMS > 0 + if (tcb->streams) + { + lldbg(" 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) + { + lldbg(" fd=%d nbytes=%d\n", + filep->fs_filedes, + filep->fs_bufpos - filep->fs_bufstart); + } + } + } +#endif +} +#endif + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * Name: _exit + * + * Description: + * This function causes the currently executing task to cease + * to exist. This is a special case of task_delete(). + * + ****************************************************************************/ + +void _exit(int status) +{ + FAR _TCB* tcb = (FAR _TCB*)g_readytorun.head; + + /* Disable interrupts. Interrupts will remain disabled until + * the new task is resumed below. + */ + + (void)irqsave(); + + lldbg("TCB=%p exitting\n", tcb); + +#if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG) + lldbg("Other tasks:\n"); + sched_foreach(_up_dumponexit, NULL); +#endif + + /* Remove the tcb task from the ready-to-run list. We can + * ignore the return value because we know that a context + * switch is needed. + */ + + (void)sched_removereadytorun(tcb); + + /* We are not in a bad stack-- the head of the ready to run task list + * does not correspond to the thread that is running. Disabling pre- + * emption on this TCB should be enough to keep things stable. + */ + + sched_lock(); + + /* Move the TCB to the specified blocked task list and delete it */ + + sched_addblocked(tcb, TSTATE_TASK_INACTIVE); + task_delete(tcb->pid); + + /* If there are any pending tasks, then add them to the g_readytorun + * task list now + */ + + if (g_pendingtasks.head) + { + (void)sched_mergepending(); + } + + /* Now calling sched_unlock() should have no effect */ + + sched_unlock(); + + /* Now, perform the context switch to the new ready-to-run task at the + * head of the list. + */ + + tcb = (FAR _TCB*)g_readytorun.head; + lldbg("New Active Task TCB=%p\n", tcb); + + /* Then switch contexts */ + + RESTORE_USERCONTEXT(tcb); +} + diff --git a/nuttx/arch/z80/src/common/up_head.asm b/nuttx/arch/z80/src/common/up_head.asm new file mode 100644 index 000000000..272754e05 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_head.asm @@ -0,0 +1,157 @@ +;**************************************************************************
+; arch/z80/src/common/up_head.S
+;
+; Copyright (C) 2007, 2008 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.
+;
+;**************************************************************************
+
+ .title NuttX for the Z80
+ .module z80_head
+
+;**************************************************************************
+; Constants
+;**************************************************************************
+
+ ; Register save area layout
+
+ XCPT_PC == 0 ; Offset to PC at time of interrupt
+ XCPT_AF == 2 ; Saved AF register
+ XCPT_HL == 4 ; Saved HL register
+ XCPT_SP == 6 ; Offset to SP at time of interrupt
+ XCPT_IY == 8 ; Saved IY register
+ XCPT_IX == 10 ; Saved IX register
+ XCPT_DE == 12 ; Saved DE register
+ XCPT_BC == 14 ; Saved BC register
+ XCPT_I == 16 ; Saved I w/interrupt state in carry
+
+;**************************************************************************
+; Global symbols used
+;**************************************************************************
+
+ .globl _os_start ; OS entry point
+ .globl _idle_stack ; Top of allocated stack region
+ .globl _up_irqdecode ; Interrupt decoding logic
+
+;**************************************************************************
+; Reset entry point
+;**************************************************************************
+
+ .area TEXT (ABS,OVR)
+ .org 0x0000
+
+ .globl _os_start
+ di ; Disable interrupts
+ ld SP, #_idle_stack ; Set stack pointer
+ im 1 ; Set interrupt mode 1
+ jp _os_start ; jump to the OS entry point
+forever:
+ jp forever
+
+;**************************************************************************
+; Interrupt handler
+;
+; Interrupt mode 1 behavior:
+;
+; 1. M1 cycle: 7 ticks
+; Acknowledge interrupt and decrements SP
+; 2. M2 cycle: 3 ticks
+; Writes the MS byte of the PC onto the stack and decrements SP
+; 3. M3 cycle: 3 ticks
+; Writes the LS byte of the PC onto the stack and sets the PC to 0x0038.
+;
+;**************************************************************************
+
+ .org 0x0038 ; Int mode 1
+
+ ; Create a register frame. SP points to top of frame + 2, pushes
+ ; decrement the stack pointer.
+ ; Offset 8: Return PC is already on the stack
+ push af ; Offset 7: AF (retaining flags)
+ push hl ; Offset 6: HL
+ ld hl, #-(3*2) ; HL is the value of the stack pointer before
+ add hl, sp ; the interrupt occurred
+ push hl ; Offset 5: Stack pointer
+ push iy ; Offset 4: IY
+ push ix ; Offset 3: IX
+ push de ; Offset 2: DE
+ push bc ; Offset 1: BC
+
+ ld a, i ; Carry bit holds interrupt state
+ push af ; Offset 0: I with interrupt state in carry
+ di
+
+ ; Call the interrupt decode logic
+ ; SP points to the beggining of the reg structure
+ ld hl, #0 ; Argument is the beginning of the reg structure
+ add hl, sp
+ push hl
+ call _up_irqdecode ; Decode the IRQ
+
+ ; Restore registers. HL points to the beginning of the reg structure to restore
+
+ ld sp, hl ; Use the temp stack pointer
+ ex af, af' ; Select alternate AF
+ pop af ; Offset 0: AF' = I with interrupt state in carry
+ pop bc ; Offset 1: BC
+ pop de ; Offset 2: DE
+ pop ix ; Offset 3: IX
+ pop iy ; Offset 4: IY
+ exx ; Use alternate BC/DE/HL
+ pop hl ; Offset 5: HL' = Stack pointer at time of interrupt
+ exx
+ pop hl ; Offset 6: HL
+ pop af ; Offset 7: AF
+
+ ; Restore the stack pointer
+
+ exx
+ ld sp, hl
+ exx
+
+ ; Restore interrupt state
+
+ ex af, af' ; Recover interrupt state
+ jr nc, nointenable ; No carry, IFF2=0, means disabled
+ ex af, af' ; Restore AF (before enabling interrupts)
+ ei ; yes
+ reti
+nointenable:
+ ex af, af' ; Restore AF
+ reti
+
+;**************************************************************************
+; NMI interrupt handler
+;**************************************************************************
+
+ .org 0x0066
+ retn
+
+
diff --git a/nuttx/arch/z80/src/common/up_idle.c b/nuttx/arch/z80/src/common/up_idle.c new file mode 100644 index 000000000..e2fb1e00f --- /dev/null +++ b/nuttx/arch/z80/src/common/up_idle.c @@ -0,0 +1,107 @@ +/**************************************************************************** + * common/up_idle.c + * + * Copyright (C) 2007, 2008 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> +#include <arch/board/board.h> + +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +#if defined(CONFIG_ARCH_LEDS) && defined(CONFIG_ARCH_BRINGUP) +static ubyte g_ledtoggle = 0; +#endif + +/**************************************************************************** + * 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_ARCH_LEDS) && defined(CONFIG_ARCH_BRINGUP) + g_ledtoggle++; + if (g_ledtoggle == 0x80) + { + up_ledon(LED_IDLE); + } + else if (g_ledtoggle == 0x00) + { + up_ledoff(LED_IDLE); + } +#endif + +#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(); +#endif +} + diff --git a/nuttx/arch/z80/src/common/up_initialize.c b/nuttx/arch/z80/src/common/up_initialize.c new file mode 100644 index 000000000..a24d814dc --- /dev/null +++ b/nuttx/arch/z80/src/common/up_initialize.c @@ -0,0 +1,158 @@ +/**************************************************************************** + * common/up_initialize.c + * + * Copyright (C) 2007, 2008 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 <nuttx/fs.h> +#include <nuttx/mm.h> +#include <arch/board/board.h> + +#include "up_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* Define to enable timing loop calibration */ + +#undef CONFIG_ARCH_CALIBRATION + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * 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 extra memory fragments to the memory manager */ + +#if CONFIG_MM_REGIONS > 1 + up_addregion(); +#endif + + /* Initialize the interrupt subsystem */ + + up_irqinitialize(); + + /* 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 */ + + up_serialinit(); + + /* Initialize the netwok */ + + up_netinitialize(); + up_ledon(LED_IRQSENABLED); +} diff --git a/nuttx/arch/z80/src/common/up_initialstate.c b/nuttx/arch/z80/src/common/up_initialstate.c new file mode 100644 index 000000000..0c87aa51d --- /dev/null +++ b/nuttx/arch/z80/src/common/up_initialstate.c @@ -0,0 +1,91 @@ +/**************************************************************************** + * common/up_initialstate.c + * + * Copyright (C) 2007, 2008 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 <string.h> +#include <nuttx/arch.h> + +#include "up_internal.h" +#include "up_arch.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Funtions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * 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)); +#ifndef CONFIG_SUPPRESS_INTERRUPTS + xcp->regs[XCPT_I] = 0x0001; /* Carry flag will enable interrupts */ +#endif + xcp->regs[XCPT_SP] = (uint16)tcb->adj_stack_ptr; + xcp->regs[XCPT_PC] = (uint16)tcb->start; +} diff --git a/nuttx/arch/z80/src/common/up_internal.h b/nuttx/arch/z80/src/common/up_internal.h new file mode 100644 index 000000000..e3da89213 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_internal.h @@ -0,0 +1,184 @@ +/**************************************************************************** + * common/up_internal.h + * + * Copyright (C) 2007, 2008 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 __UP_INTERNAL_H +#define __UP_INTERNAL_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <arch/irq.h> +#include <chip/chip.h> + +/**************************************************************************** + * 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 /* Do not enable interrupts */ +#undef CONFIG_SUPPRESS_TIMER_INTS /* No timer */ +#undef CONFIG_SUPPRESS_SERIAL_INTS /* Console will poll */ +#undef CONFIG_SUPPRESS_UART_CONFIG /* Do not reconfig UART */ +#define CONFIG_DUMP_ON_EXIT 1 /* Dump task state on exit */ + +/* Macros for portability */ + +#define IN_INTERRUPT (current_regs != NULL) +#define SAVE_IRQCONTEXT(tcb) up_copystate((tcb)->xcp.regs, current_regs) +#define SET_IRQCONTEXT(tcb) up_copystate(current_regs, (tcb)->xcp.regs) +#define SAVE_USERCONTEXT(tcb) up_saveusercontext((tcb)->xcp.regs) +#define RESTORE_USERCONTEXT(tcb) up_restoreusercontext((tcb)->xcp.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 uint16 *current_regs; +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* Defined in up_copystate.c */ + +extern void up_copystate(FAR chipreg_t *dest, FAR const chipreg_t *src); + +/* Defined in up_saveusercontext.asm */ + +extern int up_saveusercontext(chipreg_t *regs); + +/* Defined in up_restoreusercontext.asm */ + +extern int up_restoreusercontext(chipreg_t *regs); + +/* Supplied by board-specific logic */ + +extern FAR chipreg_t *up_decodeirq(FAR chipreg_t *regs); +extern void up_irqinitialize(void); +extern int up_timerisr(int irq, FAR chipreg_t *regs); + +/* Defined in up_doirq.c */ + +extern void up_doirq(int irq, FAR chipreg_t *regs); + +/* Define in up_sigdeliver */ + +extern void up_sigdeliver(void); + +#ifdef CONFIG_DEBUG +extern void up_lowputc(char ch); +#else +# define up_lowputc(ch) +#endif + +/* Defined in up_allocateheap.c */ + +#if CONFIG_MM_REGIONS > 1 +void up_addregion(void); +#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 up_timerisr.c */ + +extern void up_timerinit(void); + +/* 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 + +/* Return the current value of the stack pointer (used in stack dump logic) */ + +extern uint16 up_getsp(void); + +/* Dump stack and registers */ + +#ifdef CONFIG_ARCH_STACKDUMP +extern void up_stackdump(void); +extern void up_registerdump(void); +#else +# define up_stackdump() +# define up_registerdump() +#endif + +#endif /* __ASSEMBLY__ */ + +#endif /* __UP_INTERNAL_H */ diff --git a/nuttx/arch/z80/src/common/up_interruptcontext.c b/nuttx/arch/z80/src/common/up_interruptcontext.c new file mode 100644 index 000000000..6e9e752c9 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_interruptcontext.c @@ -0,0 +1,68 @@ +/**************************************************************************** + * common/up_interruptcontext.c + * + * Copyright (C) 2007, 2008 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> +#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. + ****************************************************************************/ + +boolean up_interrupt_context(void) +{ + return current_regs != NULL; +} diff --git a/nuttx/arch/z80/src/common/up_mdelay.c b/nuttx/arch/z80/src/common/up_mdelay.c new file mode 100644 index 000000000..33a813063 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_mdelay.c @@ -0,0 +1,94 @@ +/**************************************************************************** + * common/up_mdelay.c + * + * Copyright (C) 2007, 2008 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> + +#ifdef CONFIG_BOARD_LOOPSPERMSEC + +/**************************************************************************** + * 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++) + { + } + } +} +#endif /* CONFIG_BOARD_LOOPSPERMSEC */ + diff --git a/nuttx/arch/z80/src/common/up_registerdump.c b/nuttx/arch/z80/src/common/up_registerdump.c new file mode 100644 index 000000000..05761bf85 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_registerdump.c @@ -0,0 +1,91 @@ +/**************************************************************************** + * common/up_registerdump.c + * + * Copyright (C) 2007, 2008 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/irq.h> +#include <nuttx/arch.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * 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 + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_registerdump + ****************************************************************************/ + +#ifdef CONFIG_ARCH_STACKDUMP +static void up_registerdump(void) +{ + if (current_regs) + { + lldbg("AF: %04x I: %04x\n", + current_regs[XCPT_AF], current_regs[XCPT_I]); + lldbg("BC: %04x DE: %04x HL: %04x\n", + current_regs[XCPT_BC], current_regs[XCPT_DE], current_regs[XCPT_HL]); + lldbg("IX: %04x IY: %04x\n", + current_regs[XCPT_IX], current_regs[XCPT_IY]); + lldbg("SP: %04x PC: $04x\n" + current_regs[XCPT_SP], current_regs[XCPT_PC]); + } +} +#endif diff --git a/nuttx/arch/z80/src/common/up_releasepending.c b/nuttx/arch/z80/src/common/up_releasepending.c new file mode 100644 index 000000000..8bf0bf798 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_releasepending.c @@ -0,0 +1,137 @@ +/**************************************************************************** + * common/up_releasepending.c + * + * Copyright (C) 2007, 2008 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 <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <chip/chip.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Funtions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * 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) +{ + FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head; + + lldbg("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 (IN_INTERRUPT) + { + /* Yes, then we have to do things differently. + * Just copy the current context into the OLD rtcb. + */ + + SAVE_IRQCONTEXT(rtcb); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + lldbg("New Active Task TCB=%p\n", rtcb); + + /* Then setup so that the context will be performed on exit + * from the interrupt. + */ + + SET_IRQCONTEXT(rtcb); + } + + /* Copy the exception context into the TCB of the task that + * was currently active. if SAVE_USERCONTEXT returns a non-zero + * value, then this is really the previously running task + * restarting! + */ + + else if (!SAVE_USERCONTEXT(rtcb)) + { + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + lldbg("New Active Task TCB=%p\n", rtcb); + + /* Then switch contexts */ + + RESTORE_USERCONTEXT(rtcb); + } + } +} diff --git a/nuttx/arch/z80/src/common/up_releasestack.c b/nuttx/arch/z80/src/common/up_releasestack.c new file mode 100644 index 000000000..b00b9ab0c --- /dev/null +++ b/nuttx/arch/z80/src/common/up_releasestack.c @@ -0,0 +1,78 @@ +/************************************************************ + * common/up_releasestack.c + * + * Copyright (C) 2007 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 Gregory Nutt 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 <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 int 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/z80/src/common/up_reprioritizertr.c b/nuttx/arch/z80/src/common/up_reprioritizertr.c new file mode 100644 index 000000000..e90bd7186 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_reprioritizertr.c @@ -0,0 +1,185 @@ +/**************************************************************************** + * common/up_reprioritizertr.c + * + * Copyright (C) 2007, 2008 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 <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <chip/chip.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Funtions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * 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(FAR _TCB *tcb, ubyte priority) +{ + /* Verify that the caller is sane */ + + if (tcb->task_state < FIRST_READY_TO_RUN_STATE || + tcb->task_state > LAST_READY_TO_RUN_STATE || + priority < SCHED_PRIORITY_MIN || + priority > SCHED_PRIORITY_MAX) + { + PANIC(OSERR_BADREPRIORITIZESTATE); + } + else + { + FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head; + boolean switch_needed; + + lldbg("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 = (ubyte)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 (IN_INTERRUPT) + { + /* Yes, then we have to do things differently. + * Just copy the current context into the OLD rtcb. + */ + + SAVE_IRQCONTEXT(rtcb); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + lldbg("New Active Task TCB=%p\n", rtcb); + + /* Then setup so that the context will be performed on exit + * from the interrupt. + */ + + SET_IRQCONTEXT(rtcb); + } + + /* Copy the exception context into the TCB at the (old) head of the + * g_readytorun Task list. if SAVE_USERCONTEXT returns a non-zero + * value, then this is really the previously running task restarting! + */ + + else if (!SAVE_USERCONTEXT(rtcb)) + { + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + lldbg("New Active Task TCB=%p\n", rtcb); + + /* Then switch contexts */ + + RESTORE_USERCONTEXT(rtcb); + } + } + } +} diff --git a/nuttx/arch/z80/src/common/up_restoreusercontext.asm b/nuttx/arch/z80/src/common/up_restoreusercontext.asm new file mode 100644 index 000000000..093d18b7c --- /dev/null +++ b/nuttx/arch/z80/src/common/up_restoreusercontext.asm @@ -0,0 +1,99 @@ +;**************************************************************************
+; arch/z80/src/common/up_restoreusercontext.asm
+;
+; Copyright (C) 2007, 2008 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.
+;
+;**************************************************************************
+
+ ; Register save area layout
+
+ XCPT_I == 0 ; Saved I w/interrupt state in carry
+ XCPT_AF == 2 ; Saved AF register
+ XCPT_BC == 4 ; Saved BC register
+ XCPT_DE == 6 ; Saved DE register
+ XCPT_HL == 8 ; Saved HL register
+ XCPT_IX == 10 ; Saved IX register
+ XCPT_IY == 12 ; Saved IY register
+ XCPT_SP == 14 ; Offset to SP at time of interrupt
+ XCPT_PC == 16 ; Offset to PC at time of interrupt
+
+;**************************************************************************
+; up_restoreusercontext
+;**************************************************************************
+
+ .org 0x0038 ; Int mode 1
+ .area TEXT (ABS,OVR)
+up_restoreusercontext:
+ ; On entry, stack contains return address (not used), then address
+ ; of the register save structure
+
+ ; Discard the return address, we won't be returning
+
+ pop hl
+
+ ; Get the address of the beginning of the state save area. Each
+ ; pop will increment to the next element of the structure
+
+ pop hl ; BC = Address of save structure
+ ld sp, hl ; SP points to top of storage area
+
+ ; Disable interrupts while we muck with the alternative registers
+
+ ; Restore registers. HL points to the beginning of the reg structure to restore
+
+ ex af, af' ; Select alternate AF
+ pop af ; Offset 0: AF' = I with interrupt state in carry
+ pop bc ; Offset 1: BC
+ pop de ; Offset 2: DE
+ pop ix ; Offset 3: IX
+ pop iy ; Offset 4: IY
+ exx ; Use alternate BC/DE/HL
+ pop hl ; Offset 5: HL' = Stack pointer at time of interrupt
+ exx
+ pop hl ; Offset 6: HL
+ pop af ; Offset 7: AF
+
+ ; Restore the stack pointer
+
+ exx
+ ld sp, hl
+ exx
+
+ ; Restore interrupt state
+
+ ex af, af' ; Recover interrupt state
+ jnc noinrestore ; No carry, IFF2=0, means disabled
+ ex af, af' ; Restore AF (before enabling interrupts)
+ ei ; yes
+ ret
+noinrestore:
+ ex af, af' ; Restore AF
+ ret
diff --git a/nuttx/arch/z80/src/common/up_saveusercontext.asm b/nuttx/arch/z80/src/common/up_saveusercontext.asm new file mode 100644 index 000000000..9d25a7800 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_saveusercontext.asm @@ -0,0 +1,143 @@ +;************************************************************************* +; common/up_saveusercontext.S +; +; Copyright (C) 2007 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 Gregory Nutt 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. +; +;************************************************************************* + +;************************************************************************* +; Constants +;************************************************************************* + + ; Register save area layout + + XCPT_I == 0 ; Saved I w/interrupt state in carry + XCPT_AF == 2 ; Saved AF register + XCPT_BC == 4 ; Saved BC register + XCPT_DE == 6 ; Saved DE register + XCPT_HL == 8 ; Saved HL register + XCPT_IX == 10 ; Saved IX register + XCPT_IY == 12 ; Saved IY register + XCPT_SP == 14 ; Offset to SP at time of interrupt + XCPT_PC == 16 ; Offset to PC at time of interrupt + + ; Stack frame + + FRAME_IY == 0 ; Location of IY on the stack + FRAME_IX == 2 ; Location of IX on the stack + FRAME_RET == 4 ; Location of return address on the stack + FRAME_REGS == 6 ; Location of reg save area on stack + + SP_OFFSET == -6 + +;************************************************************************* +; Name: up_saveusercontext +;************************************************************************* + + .area TEXT (ABS,OVR) +up_saveusercontext: + ; Set up a stack frame + + push ix ; Save IX and IY + push iy + ld ix, #0 + add ix, sp ; IX = stack frame + + ; Fetch the address of the save area + + ld l, FRAME_REGS(ix) ; HL = save area address + ld h, FRAME_REGS+1(ix) ; + ld iy, #0 + add iy, hl ; IY = save area address + + ; Then save the registers + + ; Save the current interrupt state at offset 0 + + ld a, i ; Get interrupt state + push af + pop hl + ld (iy+XCPT_I), l ; Offset 0: I w/interrupt state in carry + ld (iy+XCPT_I+1), h + + ; Save BC at offset 1 + + ld (iy+XCPT_BC), c ; Offset 1: BC + ld (iy+XCPT_BC+1), b + + ; DE is not preserved (offset 2) + + ; Save IX at offset 3 + + ld l, FRAME_IX(ix) ; HL = Saved alue of IX + ld h, FRAME_IX+1(ix) ; + ld (iy+XCPT_IX), l ; Offset 3: IX + ld (iy+XCPT_IX+1), h ; + + ; Save IY at offset 4 + + ld l, FRAME_IY(ix) ; HL = Saved value of IY + ld h, FRAME_IY+1(ix) ; + ld (iy+XCPT_IY), l ; Offset 4: IY + ld (iy+XCPT_IY+1), h + + ; Save that stack pointer as it would be upon return in offset 5 + + ld hl, #SP_OFFSET ; Value of stack pointer on return + add hl, sp + ld (iy+XCPT_SP), l ; Offset 5 SP + ld (iy+XCPT_SP+1), h + + ; HL is saved as the value 1 at offset 6 + + xor a ; A = 0 + ld (iy+XCPT_HL+1), a ; Offset 2: HL on return (=1) + inc a ; A = 1 + ld (iy+XCPT_HL), a ; + + ; AF is not preserved (offset 7) + + ; Save the return address in offset 8 + + ld l, FRAME_RET(ix) ; HL = Saved return address + ld h, FRAME_RET+1(ix) ; + ld (iy+XCPT_PC), l ; Offset 8: PC + ld (iy+XCPT_PC+1), h + + ; Return the value 0 + + xor a ; HL = return value of zero + ld l, a + ld h, a + + pop iy + pop ix + ret diff --git a/nuttx/arch/z80/src/common/up_schedulesigaction.c b/nuttx/arch/z80/src/common/up_schedulesigaction.c new file mode 100644 index 000000000..90039df17 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_schedulesigaction.c @@ -0,0 +1,190 @@ +/************************************************************ + * common/up_schedulesigaction.c + * + * Copyright (C) 2007,2008 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 <sched.h> +#include <debug.h> +#include <nuttx/arch.h> +#include "os_internal.h" +#include "up_internal.h" +#include "up_arch.h" + +/************************************************************ + * Private Definitions + ************************************************************/ + +/************************************************************ + * Private Data + ************************************************************/ + +/************************************************************ + * Private Funtions + ************************************************************/ + +/************************************************************ + * Public Funtions + ************************************************************/ + +/************************************************************ + * 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 'igdeliver' 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 */ + + dbg("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. + */ + + dbg("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. + */ + + 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_pc = current_regs[REG_PC]; + tcb->xcp.saved_cpsr = current_regs[REG_CPSR]; + + /* Then set up to vector to the trampoline with interrupts + * disabled + */ + + current_regs[REG_PC] = (uint32)up_sigdeliver; + current_regs[REG_CPSR] = SVC_MODE | PSR_I_BIT | PSR_F_BIT; + + /* And make sure that the saved context in the TCB + * is the same as the interrupt return context. + */ + + up_copystate(tcb->xcp.regs, current_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_pc = tcb->xcp.regs[REG_PC]; + tcb->xcp.saved_cpsr = tcb->xcp.regs[REG_CPSR]; + + /* Then set up to vector to the trampoline with interrupts + * disabled + */ + + tcb->xcp.regs[REG_PC] = (uint32)up_sigdeliver; + tcb->xcp.regs[REG_CPSR] = SVC_MODE | PSR_I_BIT | PSR_F_BIT; + } + + irqrestore(flags); + } +} diff --git a/nuttx/arch/z80/src/common/up_sigdeliver.c b/nuttx/arch/z80/src/common/up_sigdeliver.c new file mode 100644 index 000000000..f8f0c79de --- /dev/null +++ b/nuttx/arch/z80/src/common/up_sigdeliver.c @@ -0,0 +1,137 @@ +/************************************************************ + * common/up_sigdeliver.c + * + * Copyright (C) 2007 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 Gregory Nutt 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 <sched.h> +#include <debug.h> +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include "os_internal.h" +#include "up_internal.h" +#include "up_arch.h" + +/************************************************************ + * Definitions + ************************************************************/ + +/************************************************************ + * Private Data + ************************************************************/ + +/************************************************************ + * Private Functions + ************************************************************/ + +/************************************************************ + * Public Funtions + ************************************************************/ + +/************************************************************ + * 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) +{ +#ifndef CONFIG_DISABLE_SIGNALS + _TCB *rtcb = (_TCB*)g_readytorun.head; + uint32 regs[XCPTCONTEXT_REGS]; + sig_deliver_t sigdeliver; + + /* Save the errno. This must be preserved throughout the + * signal handling so that the the user code final gets + * the correct errno value (probably EINTR). + */ + + int saved_errno = rtcb->errno; + + up_ledon(LED_SIGNAL); + + dbg("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_PC] = rtcb->xcp.saved_pc; + regs[REG_CPSR] = rtcb->xcp.saved_cpsr; + + /* Get a local copy of the sigdeliver function pointer. + * we do this so that we can nullify the sigdeliver + * function point 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_CPSR]); + + /* Deliver the signals */ + + sigdeliver(rtcb); + + /* Output any debug messaged BEFORE restoring errno + * (because they may alter errno), then restore the + * original errno that is needed by the user logic + * (it is probably EINTR). + */ + + dbg("Resuming\n"); + rtcb->errno = saved_errno; + + /* Then restore the correct state for this thread of + * execution. + */ + + up_ledoff(LED_SIGNAL); + up_fullcontextrestore(regs); +#endif +} diff --git a/nuttx/arch/z80/src/common/up_stackdump.c b/nuttx/arch/z80/src/common/up_stackdump.c new file mode 100644 index 000000000..00c923aa9 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_stackdump.c @@ -0,0 +1,109 @@ +/**************************************************************************** + * common/up_stackdump.c + * + * Copyright (C) 2007, 2008 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 "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * 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 + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_getsp + ****************************************************************************/ +#warning TO BE PROVIDED + +/**************************************************************************** + * Name: up_stackdump + ****************************************************************************/ + +#ifdef CONFIG_ARCH_STACKDUMP +static void up_stackdump(void) +{ + _TCB *rtcb = (_TCB*)g_readytorun.head; + uint16 sp = up_getsp(); + uint16 stack_base = (uint16)rtcb->adj_stack_ptr; + uint16 stack_size = (uint16)rtcb->adj_stack_size; + + lldbg("stack_base: %04x\n", stack_base); + lldbg("stack_size: %04x\n", stack_size); + lldbg("sp: %04x\n", sp); + + if (sp >= stack_base || sp < stack_base - stack_size) + { + lldbg("ERROR: Stack pointer is not within allocated stack\n"); + return; + } + else + { + uint16 stack = sp & ~0x0f; + + for (stack = sp & ~0x0f; stack < stack_base; stack += 8*sizeof(uint16)) + { + uint16 *ptr = (uint16*)stack; + lldbg("%04x: %04x %04x %04x %04x %04x %04x %04x %04x\n", + stack, ptr[0], ptr[1], ptr[2], ptr[3], + ptr[4], ptr[5], ptr[6], ptr[7]); + } + } +} +#endif diff --git a/nuttx/arch/z80/src/common/up_udelay.c b/nuttx/arch/z80/src/common/up_udelay.c new file mode 100644 index 000000000..9982644ea --- /dev/null +++ b/nuttx/arch/z80/src/common/up_udelay.c @@ -0,0 +1,132 @@ +/**************************************************************************** + * common/up_udelay.c + * + * Copyright (C) 2007 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 Gregory Nutt 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> + +#ifdef CONFIG_BOARD_LOOPSPERMSEC + +/**************************************************************************** + * 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(unsigned int 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--; + } +} +#endif /* CONFIG_BOARD_LOOPSPERMSEC */ + diff --git a/nuttx/arch/z80/src/common/up_unblocktask.c b/nuttx/arch/z80/src/common/up_unblocktask.c new file mode 100644 index 000000000..8934c700c --- /dev/null +++ b/nuttx/arch/z80/src/common/up_unblocktask.c @@ -0,0 +1,168 @@ +/**************************************************************************** + * common/up_unblocktask.c + * + * Copyright (C) 2007, 2008 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 <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <chip/chip.h> + +#include "os_internal.h" +#include "clock_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Funtions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * 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(FAR _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 + { + FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head; + + /* dbg("Unblocking TCB=%p\n", tcb); */ + + /* 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 (IN_INTERRUPT) + { + /* Yes, then we have to do things differently. + * Just copy the current context into the OLD rtcb. + */ + + SAVE_IRQCONTEXT(rtcb); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + /* dbg("New Active Task TCB=%p\n", rtcb); */ + + /* Then setup so that the context will be performed on exit + * from the interrupt. + */ + + SET_IRQCONTEXT(rtcb); + } + + /* We are not in an interrupt handler. Copy the user C context + * into the TCB of the task that was previously active. if + * SAVE_USERCONTEXT returns a non-zero value, then this is really the + * previously running task restarting! + */ + + else if (!SAVE_USERCONTEXT(rtcb)) + { + /* 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 = (FAR _TCB*)g_readytorun.head; + /* dbg("New Active Task TCB=%p\n", rtcb); */ + + /* Then switch contexts */ + + RESTORE_USERCONTEXT(rtcb); + } + } + } +} diff --git a/nuttx/arch/z80/src/common/up_usestack.c b/nuttx/arch/z80/src/common/up_usestack.c new file mode 100644 index 000000000..2da044182 --- /dev/null +++ b/nuttx/arch/z80/src/common/up_usestack.c @@ -0,0 +1,118 @@ +/************************************************************ + * common/up_usestack.c + * + * Copyright (C) 2007 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 Gregory Nutt 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 <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. + * + ************************************************************/ + +STATUS 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 Arm7Tdmi 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)tcb->stack_alloc_ptr + stack_size - 4; + + /* The Arm7Tdmi 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)tcb->stack_alloc_ptr + 4; + + /* Save the adjusted stack values in the _TCB */ + + tcb->adj_stack_size = top_of_stack; + tcb->adj_stack_size = size_of_stack; + + return OK; +} diff --git a/nuttx/arch/z80/src/z80/Make.defs b/nuttx/arch/z80/src/z80/Make.defs new file mode 100644 index 000000000..80d5c7c0b --- /dev/null +++ b/nuttx/arch/z80/src/z80/Make.defs @@ -0,0 +1,48 @@ +############################################################################ +# sdcc/src/z80/Make.defs +# +# Copyright (C) 2007 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 Gregory Nutt 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. +# +############################################################################ + +HEAD_ASRC = up_head.asm + +CMN_ASRCS = up_saveusercontext.asm up_restoreusercontext.asm +CMN_CSRCS = up_initialize.c up_allocateheap.c up_initialstate.c \ + up_createstack.c up_releasestack.c up_interruptcontext.c \ + up_blocktask.c up_unblocktask.c up_exit.c up_releasepending.c \ + up_reprioritizertr.c up_copystate.c up_idle.c \ + up_assert.c up_mdelay.c up_udelay.c \ + up_registerdump.c up_usestack.c \ + +CHIP_ASRCS = +CHIP_CSRCS = + diff --git a/nuttx/arch/z80/src/z80/chip.h b/nuttx/arch/z80/src/z80/chip.h new file mode 100644 index 000000000..9f85f1475 --- /dev/null +++ b/nuttx/arch/z80/src/z80/chip.h @@ -0,0 +1,66 @@ +/************************************************************************************ + * z80/chip.h + * chip/chip.h + * + * Copyright (C) 2007, 2008 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 __Z80_CHIP_H +#define __Z80_CHIP_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/************************************************************************************ + * 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 /* __Z80_CHIP_H */ |