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initialize register r31(LP) with texit in V850/cpuport.c 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2305 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
dzzxzz@gmail.com 2012-09-25 03:19:43 +00:00
parent 76ba5137dd
commit 6dcb1207b1
1 changed files with 44 additions and 38 deletions
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82
libcpu/v850/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
* 2012-09-23 lgnq initialize register r31(LP) with texit
*/ */
#include <rtthread.h> #include <rtthread.h>
@ -27,9 +28,9 @@ rt_uint32_t rt_thread_switch_interrupt_flag;
void rt_hw_interrupt_init(void) void rt_hw_interrupt_init(void)
{ {
/* init interrupt nest, and context in thread sp */ /* init interrupt nest, and context in thread sp */
rt_interrupt_nest = 0; rt_interrupt_nest = 0;
rt_interrupt_from_thread = 0; rt_interrupt_from_thread = 0;
rt_interrupt_to_thread = 0; rt_interrupt_to_thread = 0;
rt_thread_switch_interrupt_flag = 0; rt_thread_switch_interrupt_flag = 0;
} }
@ -43,44 +44,49 @@ 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_uint32_t *stk; rt_uint32_t *stk;
stk = (rt_uint32_t *)stack_addr; /* Load stack pointer */ stk = (rt_uint32_t *)stack_addr; /* Load stack pointer */
*(--stk) = (rt_uint32_t) 0x23232323; /* r23 */
*(--stk) = (rt_uint32_t) 0x24242424; /* r24 */ *(--stk) = (rt_uint32_t)0x23232323; /* r23 */
*(--stk) = (rt_uint32_t) 0x25252525; /* r25 */ *(--stk) = (rt_uint32_t)0x24242424; /* r24 */
*(--stk) = (rt_uint32_t) 0x26262626; /* r26 */ *(--stk) = (rt_uint32_t)0x25252525; /* r25 */
*(--stk) = (rt_uint32_t) 0x27272727; /* r27 */ *(--stk) = (rt_uint32_t)0x26262626; /* r26 */
*(--stk) = (rt_uint32_t) 0x28282828; /* r28 */ *(--stk) = (rt_uint32_t)0x27272727; /* r27 */
*(--stk) = (rt_uint32_t) 0x29292929; /* r29 */ *(--stk) = (rt_uint32_t)0x28282828; /* r28 */
*(--stk) = (rt_uint32_t) 0x30303030; /* r30 */ *(--stk) = (rt_uint32_t)0x29292929; /* r29 */
*(--stk) = (rt_uint32_t) 0x31313131; /* r31 */ *(--stk) = (rt_uint32_t)0x30303030; /* r30 */
*(--stk) = (rt_uint32_t) 0x00000000; /* Task PSW = Interrupts enabled */ *(--stk) = (rt_uint32_t)texit; /* r31 */
*(--stk) = (rt_uint32_t) tentry; /* Task's PC */ *(--stk) = (rt_uint32_t)0x00000000; /* Task PSW = Interrupts enabled */
*(--stk) = (rt_uint32_t) 0x16161616; /* r16 */ *(--stk) = (rt_uint32_t)tentry; /* Task's PC */
*(--stk) = (rt_uint32_t) 0x15151515; /* r15 */ *(--stk) = (rt_uint32_t)0x16161616; /* r16 */
*(--stk) = (rt_uint32_t) 0x14141414; /* r14 */ *(--stk) = (rt_uint32_t)0x15151515; /* r15 */
*(--stk) = (rt_uint32_t) 0x13131313; /* r13 */ *(--stk) = (rt_uint32_t)0x14141414; /* r14 */
*(--stk) = (rt_uint32_t) 0x12121212; /* r12 */ *(--stk) = (rt_uint32_t)0x13131313; /* r13 */
*(--stk) = (rt_uint32_t) 0x11111111; /* r11 */ *(--stk) = (rt_uint32_t)0x12121212; /* r12 */
*(--stk) = (rt_uint32_t) 0x10101010; /* r10 */ *(--stk) = (rt_uint32_t)0x11111111; /* r11 */
*(--stk) = (rt_uint32_t) 0x09090909; /* r9 */ *(--stk) = (rt_uint32_t)0x10101010; /* r10 */
*(--stk) = (rt_uint32_t) 0x08080808; /* r8 */ *(--stk) = (rt_uint32_t)0x09090909; /* r9 */
*(--stk) = (rt_uint32_t) 0x07070707; /* r7 */ *(--stk) = (rt_uint32_t)0x08080808; /* r8 */
*(--stk) = (rt_uint32_t) 0x06060606; /* r6 */ *(--stk) = (rt_uint32_t)0x07070707; /* r7 */
*(--stk) = (rt_uint32_t) 0x05050505; /* r5 */ *(--stk) = (rt_uint32_t)0x06060606; /* r6 */
*(--stk) = (rt_uint32_t) 0x02020202; /* r2 */ *(--stk) = (rt_uint32_t)0x05050505; /* r5 */
*(--stk) = (rt_uint32_t) parameter; /* r1 */ *(--stk) = (rt_uint32_t)0x02020202; /* r2 */
return ((rt_uint8_t *)stk); *(--stk) = (rt_uint32_t)parameter; /* r1 */
return ((rt_uint8_t *)stk);
} }
void rt_hw_context_switch(rt_uint32_t from, rt_uint32_t to) void rt_hw_context_switch(rt_uint32_t from, rt_uint32_t to)
{ {
rt_interrupt_from_thread = from; rt_interrupt_from_thread = from;
rt_interrupt_to_thread = to; rt_interrupt_to_thread = to;
asm("trap 0x10"); asm("trap 0x10");
} }
void rt_hw_context_switch_interrupt(rt_uint32_t from, rt_uint32_t to) void rt_hw_context_switch_interrupt(rt_uint32_t from, rt_uint32_t to)
@ -88,7 +94,7 @@ void rt_hw_context_switch_interrupt(rt_uint32_t from, rt_uint32_t to)
if (rt_thread_switch_interrupt_flag != 1) if (rt_thread_switch_interrupt_flag != 1)
{ {
rt_thread_switch_interrupt_flag = 1; rt_thread_switch_interrupt_flag = 1;
rt_interrupt_from_thread = from; rt_interrupt_from_thread = from;
} }
rt_interrupt_to_thread = to; rt_interrupt_to_thread = to;
} }