/************************************************************************************
* arch/sh/src/m16c/chip.h
*
* Copyright (C) 2009 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 "chip.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/************************************************************************************
* Macro Definitions
************************************************************************************/
/* Zero a block of memory */
.macro m16c_bzero, start, end
mov.b #0x00, R0L
mov.w #(\start & 0x0ffff), A1
mov.w #(\end & 0x0ffff), R3
sub.w A1, R3
sstr.b
.endm
/* Copy a block of memory */
.macro m16c_memcpy, dest, src, end
mov.w #(\dest & 0x0ffff),A0
mov.b #(\dest >> 16), R1H
mov.w #\src, A1
mov.w #(\end & 0x0ffff), R3
sub.w A1, R3
smovf.b
.endm
/* Special page vectors. This macro puts the jump address of
* functions defined as special page into the special page vector table.
* See example calls below and see the M16C Software Manual or NC30
* manual for more information on special page vectors.
*/
#if 0
.macro m16c_special, num
.org 0x0ffffe-(\num*2)
.globl __SPECIAL_\num
.word __SPECIAL_\num & 0x0ffff
.endm
#enif
/************************************************************************************
* Data
************************************************************************************/
/* The near RAM memory map is as follows:
*
* 0x00400 - DATA Size: Determined by linker
* BSS Size: Determined by linker
* Idle stack Size: CONFIG_IDLETHREAD_STACKSIZE
* Interrupt stack Size: CONFIG_M16C_ISTACKSIZE
* Heap Size: Everything remaining
* 0x00bff - (end+1)
*/
.data
.globl _g_stackbase
.type _g_stackbase, object
_g_stackbase:
.word _enbss
.size _g_heapbase, .-_g_heapbase
.size _g_istackbase, .-_g_istackbase
.globl _g_istackbase
.type _g_istackbase, object
_g_istackbase:
.word _enbss+CONFIG_IDLETHREAD_STACKSIZE-4
.size _g_istackbase, .-_g_istackbase
* The heap extends from _g_heapbase to the end of RAM.
*/
.globl _g_heapbase
.type _g_heapbase, object
_g_heapbase:
.word _enbss+CONFIG_IDLETHREAD_STACKSIZE+CONFIG_M16C_ISTACKSIZE
.size _g_heapbase, .-_g_heapbase
/************************************************************************************
* Interrupt Vectors
************************************************************************************/
/* Variable vector section */
.section varvects /* Variable vector table */
.globl _m16c_unexpected_isr
.globl _m16c_brk_isr
.long _m16c_brk_isr /* ffd00: BRK instruction */
.long 0xffffffff /* ffd04 */
.long 0xffffffff /* ffd08 */
.long 0xffffffff /* ffd0c */
.globl _m16c_int3_isr
.long _m16c_int3_isr /* ffd10: INT3 */
#ifdef CONFIG_M16C_SWINTS
.globl _m16c_swint5_isr
.long _m16c_swint5_isr /* ffd14: S/W interrupt 5 */
.globl _m16c_swint6_isr
.long _m16c_swint6_isr /* ffd18: S/W interrupt 6 */
.globl _m16c_swint7_isr
.long _m16c_swint7_isr /* ffd1c: S/W interrupt 7 */
#else
.long _m16c_unexpected_isr /* ffd14: Reserved */
.long _m16c_unexpected_isr /* ffd18: Reserved */
.long _m16c_unexpected_isr /* ffd1c: Reserved */
#endif
.globl _m16c_int5_isr
.long _m16c_int5_isr /* ffd20: INT5 */
.globl _m16c_int4_isr
.long _m16c_int4_isr /* ffd24: INT4 */
.globl _m16c_uart2bcd_isr
.long _m16c_uart2bcd_isr /* ffd28: UART2 bus collision detection */
.globl _m16c_dma0_isr
.long _m16c_dma0_isr /* ffd2c: DMA0 */
.globl _m16c_dma1_isr
.long _m16c_dma1_isr /* ffd30: DMA1 */
.globl _m16c_keyinp_isr
.long _m16c_keyinp_isr /* ffd34: Key input interrupt */
.globl _m16c_adc_isr
.long _m16c_adc_isr /* ffd38: A-D */
.globl _m16c_uart2xmitnack2_isr
.long _m16c_uart2xmitnack2_isr /* ffd3c UART2 transmit/NACK2 */
.globl _m16c_uart2rcvack2_isr
.long _m16c_uart2rcvack2_isr /* ffd40: UART2 receive/ACK2 */
.globl _m16c_uart0xmit_isr
.long _m16c_uart0xmit_isr /* ffd44: UART0 transmit */
.globl _m16c_uart0rcv_isr
.long _m16c_uart0rcv_isr /* ffd48: UART0 receive */
.globl _m16c_uart1xmit_isr
.long _m16c_uart1xmit_isr /* ffd4c: UART1 transmit */
.globl _m16c_uart1rcv_isr
.long _m16c_uart1rcv_isr /* ffd50: UART1 receive */
.globl _m16c_tmra0_isr
.long _m16c_tmra0_isr /* ffd54: Timer A0 */
.globl _m16c_tmra1_isr
.long _m16c_tmra1_isr /* ffd58: Timer A1 */
.globl _m16c_tmra2_isr
.long _m16c_tmra2_isr /* ffd5c: Timer A2 */
.globl _m16c_tmra3_isr
.long _m16c_tmra3_isr /* ffd60: Timer A3 */
.globl _m16c_tmra4_isr
.long _m16c_tmra4_isr /* ffd64: Timer A4 */
.globl _m16c_tmrb0_isr
.long _m16c_tmrb0_isr /* ffd68: Timer B0 */
.globl _m16c_tmrb1_isr
.long _m16c_tmrb1_isr /* ffd6c: Timer B1 */
.globl _m16c_tmrb2_isr
.long _m16c_tmrb2_isr /* ffd70: Timer B2 */
.globl _m16c_int0_isr
.long _m16c_int0_isr /* ffd74: INT0 */
.globl _m16c_int1_isr
.long _m16c_int1_isr /* ffd78: INT1 */
#ifdef CONFIG_M16C_SWINTS
.globl _m16c_swint31_isr
.long _m16c_swint31_isr /* ffd7c: S/W interrupt 31 */
.globl _m16c_swint32_isr
.long _m16c_swint32_isr /* ffd80: S/W interrupt 32 */
.globl _m16c_swint33_isr
.long _m16c_swint33_isr /* ffd84: S/W interrupt 33 */
.globl _m16c_swint34_isr
.long _m16c_swint34_isr /* ffd88: S/W interrupt 34 */
.globl _m16c_swint35_isr
.long _m16c_swint35_isr /* ffd8c: S/W interrupt 35 */
.globl _m16c_swint36_isr
.long _m16c_swint36_isr /* ffd90: S/W interrupt 36 */
.globl _m16c_swint37_isr
.long _m16c_swint37_isr /* ffd94: S/W interrupt 37 */
.globl _m16c_swint38_isr
.long _m16c_swint38_isr /* ffd98: S/W interrupt 38 */
.globl _m16c_swint39_isr
.long _m16c_swint39_isr /* ffd9c: S/W interrupt 39 */
.globl _m16c_swint40_isr
.long _m16c_swint40_isr /* ffda0: S/W interrupt 40 */
.globl _m16c_swint41_isr
.long _m16c_swint41_isr /* ffda4: S/W interrupt 41 */
.globl _m16c_swint42_isr
.long _m16c_swint42_isr /* ffda8: S/W interrupt 42 */
.globl _m16c_swint43_isr
.long _m16c_swint43_isr /* ffdac: S/W interrupt 43 */
.globl _m16c_swint44_isr
.long _m16c_swint44_isr /* ffdb0: S/W interrupt 44 */
.globl _m16c_swint45_isr
.long _m16c_swint45_isr /* ffdb4: S/W interrupt 45 */
.globl _m16c_swint46_isr
.long _m16c_swint46_isr /* ffdb8: S/W interrupt 46 */
.globl _m16c_swint47_isr
.long _m16c_swint47_isr /* ffdbc: S/W interrupt 47 */
.globl _m16c_swint48_isr
.long _m16c_swint48_isr /* ffdc0: S/W interrupt 48 */
.globl _m16c_swint49_isr
.long _m16c_swint49_isr /* ffdc4: S/W interrupt 49 */
.globl _m16c_swint50_isr
.long _m16c_swint50_isr /* ffdc8: S/W interrupt 50 */
.globl _m16c_swint51_isr
.long _m16c_swint51_isr /* ffdcc: S/W interrupt 51 */
.globl _m16c_swint52_isr
.long _m16c_swint52_isr /* ffdd0: S/W interrupt 52 */
.globl _m16c_swint53_isr
.long _m16c_swint53_isr /* ffdd4: S/W interrupt 53 */
.globl _m16c_swint54_isr
.long _m16c_swint54_isr /* ffdd8: S/W interrupt 54 */
.globl _m16c_swint55_isr
.long _m16c_swint55_isr /* ffddc: S/W interrupt 55 */
.globl _m16c_swint56_isr
.long _m16c_swint56_isr /* ffde0: S/W interrupt 56 */
.globl _m16c_swint57_isr
.long _m16c_swint57_isr /* ffde4: S/W interrupt 57 */
.globl _m16c_swint58_isr
.long _m16c_swint58_isr /* ffde8: S/W interrupt 58 */
.globl _m16c_swint59_isr
.long _m16c_swint59_isr /* ffdec: S/W interrupt 59 */
.globl _m16c_swint60_isr
.long _m16c_swint60_isr /* ffdf0: S/W interrupt 60 */
.globl _m16c_swint61_isr
.long _m16c_swint61_isr /* ffdf4: S/W interrupt 61 */
.globl _m16c_swint62_isr
.long _m16c_swint62_isr /* ffdf8: S/W interrupt 62 */
.globl _m16c_swint63_isr
.long _m16c_swint63_isr /* ffdfc: S/W interrupt 63 */
#else
.long _m16c_unexpected_isr /* ffd7c: Reserved */
.long _m16c_unexpected_isr /* ffd80: Not supported */
.long _m16c_unexpected_isr /* ffd84: Not supported */
.long _m16c_unexpected_isr /* ffd88: Not supported */
.long _m16c_unexpected_isr /* ffd8c: Not supported */
.long _m16c_unexpected_isr /* ffd90: Not supported */
.long _m16c_unexpected_isr /* ffd94: Not supported */
.long _m16c_unexpected_isr /* ffd98: Not supported */
.long _m16c_unexpected_isr /* ffd9c: Not supported */
.long _m16c_unexpected_isr /* ffda0: Not supported */
.long _m16c_unexpected_isr /* ffda4: Not supported1 */
.long _m16c_unexpected_isr /* ffda8: Not supported */
.long _m16c_unexpected_isr /* ffdac: Not supported */
.long _m16c_unexpected_isr /* ffdb0: Not supported */
.long _m16c_unexpected_isr /* ffdb4: Not supported */
.long _m16c_unexpected_isr /* ffdb8: Not supported */
.long _m16c_unexpected_isr /* ffdbc: Not supported */
.long _m16c_unexpected_isr /* ffdc0: Not supported */
.long _m16c_unexpected_isr /* ffdc4: Not supported */
.long _m16c_unexpected_isr /* ffdc8: Not supported */
.long _m16c_unexpected_isr /* ffdcc: Not supported1 */
.long _m16c_unexpected_isr /* ffdd0: Not supported */
.long _m16c_unexpected_isr /* ffdd4: Not supported3 */
.long _m16c_unexpected_isr /* ffdd8: Not supported */
.long _m16c_unexpected_isr /* ffddc: Not supported */
.long _m16c_unexpected_isr /* ffde0: Not supported */
.long _m16c_unexpected_isr /* ffde4: Not supported7 */
.long _m16c_unexpected_isr /* ffde8: Not supported */
\ .long _m16c_unexpected_isr /* ffdec: Not supported */
.long _m16c_unexpected_isr /* ffdf0: Not supported0 */
.long _m16c_unexpected_isr /* ffdf4: Not supported */
.long _m16c_unexpected_isr /* ffdf8: Not supported */
.long _m16c_unexpected_isr /* ffdfc: Not supported */
#endif
/* Fixed vector section
*
* The fixed vector table begins at address ffe00. The firt portion
* of the fixed vector table is the special page table. This table
* is not currently used.
*/
.section specpg /* Special page table */
.section fixvects /* Fixed vector table */
.globl _m16c_undefinst_irq
.long _m16c_undefinst_irq /* fffdc: Undefined instruction */
.globl _m16c_overflow_irq
.long _m16c_overflow_irq /* fffe0: Overflow */
.globl _m16c_brkinst_irq
.long _m16c_brkinst_irq /* fffe4: BRK instruction */
.globl _m16c_addrmatch_irq
.long _m16c_addrmatch_irq /* fffe8: Address match */
#ifdef CONFIG_M16C_DEBUGGER
.globl _m16c_sstep_irq
.long _m16c_sstep_irq /* fffec: Single step */
#else
.long _m16c_unexpected_isr /* fffec: Not supported */
#endif
.globl _m16c_wdog_irq
.long _m16c_wdog_irq /* ffff0: Watchdog timer */
#ifdef CONFIG_M16C_DEBUGGER
.globl _m16c_dbc_irq
.long _m16c_dbc_irq /* ffff4: DBC */
#else
.long _m16c_unexpected_isr /* ffff4: Not supported */
#endif
.globl _m16c_nmi_irq
.long _m16c_nmi_irq /* ffff8: NMI */
.long __start /* ffffc: Reset */
/************************************************************************************
* Code
************************************************************************************/
/************************************************************************************
* Name: _start
*
* Description:
* After reset, program execution starts here.
*
************************************************************************************/
.text
.global __start
.type __start, #function
__start:
/* Set the istack pointer */
ldc #_enbss, isp /* Set idle thread stack pointer to the end of BSS */
/* Set BCLK speed. At reset, the processor clock (BLCK) defaults to a divisor of 8.
* This sets clock to F1 (divide by 1) on XIN: BCLK = XIN frequency.
*/
mov.b #0x01h, M16C_PRCR /* Unprotect CM0 to change clock setting */
mov.b #0x08h, M16C_CM0 /* enable CM17 and CM16 to set BCLK to F1
* CM17 & CM16 defaults to 0 after reset and
* so we only need to reset CM06 to 0 */
mov.b #0x00,M16C_PRCR /* protect CM0 */
/* The two MS bits of the interrupt cause select register must be set to
* enable the use of INT4 and INT5
*/
mov.b #0xc0, M16C_IFSR /* Set b7 & b6 if application will use INT4 & INT5 */
ldc #M16C_IRAM_BASE, sb /* Set sb register (to what?) */
ldintb #_svarvect
/* Clear .bss sections */
m16c_bzero _snbss, _enbss
#ifdef CONFIG_M16C_HAVEFARRAM
m16c_bzero _sfbss, _efbss
#endif
/* Initialize .data sections */
m16c_memcpy _sndata, _enronly, _endata
#ifdef CONFIG_M16C_HAVEFARRAM
m16c_memcpy _sfdata, _efronly, _efdata
#endif
/* Pass control to NuttX */
.glbl _os_start
jsr.a _os_start
/* NuttX will not return, but just in case... */
.Lreturned:
jmp .Lreturned
