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save texit address in to thread stack in m16c

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2308 bbd45198-f89e-11dd-88c7-29a3b14d5316
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dzzxzz@gmail.com 2012-09-26 06:43:35 +00:00
parent 443c7c3597
commit e0a5c0ae81
1 changed files with 43 additions and 37 deletions
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36
libcpu/m16c/m16c62p/cpuport.c
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@ -1,7 +1,7 @@
/* /*
* File : cpuport.c * File : cpuport.c
* This file is part of RT-Thread RTOS * This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2009 - 2011, RT-Thread Development Team * COPYRIGHT (C) 2009 - 2012, RT-Thread Development Team
* *
* The license and distribution terms for this file may be * The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at * found in the file LICENSE in this distribution or at
@ -10,6 +10,7 @@
* Change Logs: * Change Logs:
* Date Author Notes * Date Author Notes
* 2011-02-23 Bernard the first version * 2011-02-23 Bernard the first version
* 2012-09-25 lgnq save texit address in to thread stack
*/ */
#include <rtthread.h> #include <rtthread.h>
@ -43,30 +44,35 @@ void rt_hw_interrupt_init(void)
* *
* @return stack address * @return stack address
*/ */
rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit) rt_uint8_t *rt_hw_stack_init(void *tentry,
void *parameter,
rt_uint8_t *stack_addr,
void *texit)
{ {
rt_uint16_t *pstk16; rt_uint16_t *pstk16;
rt_uint16_t flag; rt_uint16_t flag;
flag = 0x0040; flag = 0x0040;
pstk16 = (rt_uint16_t *)stack_addr; pstk16 = (rt_uint16_t *)stack_addr;
pstk16--;
*pstk16-- = (rt_uint32_t)texit >> 16L;
*pstk16-- = (rt_uint32_t)texit & 0x0000FFFFL;
/* Simulate ISR entry */ /* Simulate ISR entry */
*pstk16-- = (flag&0x00FF) /* ... The lowest byte of the FLAG register */ *pstk16-- = (flag&0x00FF) | /* The lowest byte of the FLAG register */
| (((rt_uint32_t)tentry>>8)&0x00000F00) /* ... The highest nibble of the PC register */ (((rt_uint32_t)tentry>>8)&0x00000F00) | /* The highest nibble of the PC register */
| ((flag<<4)&0xF000); /* ... The highest nibble of the FLAG register */ ((flag<<4)&0xF000); /* The highest nibble of the FLAG register */
*pstk16-- = (((rt_uint32_t)tentry)&0x0000FFFF); /* ... The lowest bytes of the PC register */ *pstk16-- = (((rt_uint32_t)tentry)&0x0000FFFF); /* The lowest bytes of the PC register */
/* Save registers onto stack frame */ /* Save registers onto stack frame */
*pstk16-- = (rt_uint16_t)0xFBFB; /* ... FB register */ *pstk16-- = (rt_uint16_t)0xFBFB; /* FB register */
*pstk16-- = (rt_uint16_t)0x3B3B; /* ... SB register */ *pstk16-- = (rt_uint16_t)0x3B3B; /* SB register */
*pstk16-- = (rt_uint16_t)0xA1A1; /* ... A1 register */ *pstk16-- = (rt_uint16_t)0xA1A1; /* A1 register */
*pstk16-- = (rt_uint16_t)0xA0A0; /* ... A0 register */ *pstk16-- = (rt_uint16_t)0xA0A0; /* A0 register */
*pstk16-- = (rt_uint16_t)0x3333; /* ... R3 register */ *pstk16-- = (rt_uint16_t)0x3333; /* R3 register */
*pstk16-- = (rt_uint32_t)parameter >> 16L; /* ... Pass argument in R2 register */ *pstk16-- = (rt_uint32_t)parameter >> 16L; /* Pass argument in R2 register */
*pstk16-- = (rt_uint32_t)parameter & 0x0000FFFFL; /* ... Pass argument in R1 register */ *pstk16-- = (rt_uint32_t)parameter & 0x0000FFFFL; /* Pass argument in R1 register */
*pstk16 = (rt_uint16_t)0x0000; /* ... R0 register */ *pstk16 = (rt_uint16_t)0x0000; /* R0 register */
/* return task's current stack address */ /* return task's current stack address */
return (rt_uint8_t *)pstk16; return (rt_uint8_t *)pstk16;