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update cortex-M4 libcpu 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1773 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
wuyangyong 2011-10-27 02:30:47 +00:00
parent b488c4fa0a
commit 8e7398e010
1 changed files with 122 additions and 87 deletions
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51
libcpu/arm/cortex-m4/cpuport.c
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@ -30,20 +30,55 @@ struct stack_contex
rt_uint32_t psr;
};
struct stack_contex_fpu
{
rt_uint32_t r0;
rt_uint32_t r1;
rt_uint32_t r2;
rt_uint32_t r3;
rt_uint32_t r12;
rt_uint32_t lr;
rt_uint32_t pc;
rt_uint32_t psr;
/* FPU register */
rt_uint32_t S0;
rt_uint32_t S1;
rt_uint32_t S2;
rt_uint32_t S3;
rt_uint32_t S4;
rt_uint32_t S5;
rt_uint32_t S6;
rt_uint32_t S7;
rt_uint32_t S8;
rt_uint32_t S9;
rt_uint32_t S10;
rt_uint32_t S11;
rt_uint32_t S12;
rt_uint32_t S13;
rt_uint32_t S14;
rt_uint32_t S15;
rt_uint32_t FPSCR;
rt_uint32_t NO_NAME;
};
rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
rt_uint8_t *stack_addr, void *texit)
{
unsigned long *stk;
struct stack_contex_fpu * stack_contex_fpu;
stk = (unsigned long *)stack_addr;
*(stk) = 0x01000000L; /* PSR */
*(--stk) = (unsigned long)tentry; /* entry point, pc */
*(--stk) = (unsigned long)texit; /* lr */
*(--stk) = 0; /* r12 */
*(--stk) = 0; /* r3 */
*(--stk) = 0; /* r2 */
*(--stk) = 0; /* r1 */
*(--stk) = (unsigned long)parameter; /* r0 : argument */
stk -= sizeof(struct stack_contex_fpu);
stack_contex_fpu = (struct stack_contex_fpu *)stk;
stack_contex_fpu->r0 = (unsigned long)parameter; /* r0 : argument */
stack_contex_fpu->r1 = 0; /* r1 */
stack_contex_fpu->r2 = 0; /* r2 */
stack_contex_fpu->r3 = 0; /* r3 */
stack_contex_fpu->r12 = 0; /* r12 */
stack_contex_fpu->lr = (unsigned long)texit; /* lr */
stack_contex_fpu->pc = (unsigned long)tentry; /* entry point, pc */
stack_contex_fpu->psr = 0x01000000L; /* PSR */
*(--stk) = 0; /* r11 */
*(--stk) = 0; /* r10 */