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[libcpu]: add 8-byte alignment for arm architecture && optimize code format

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SummerGift
2017-12-21 16:37:38 +08:00
parent 336207ad31
commit fc7a5abc76
13 changed files with 325 additions and 298 deletions
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libcpu/arm/arm926/stack.c
+6 -7
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@@ -50,10 +50,9 @@ rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
{
rt_uint32_t *stk;
//stk = (rt_uint32_t*)stack_addr;
stack_addr += sizeof(rt_uint32_t);
stack_addr = (rt_uint8_t *)RT_ALIGN_DOWN((rt_uint32_t)stack_addr, 8);
stk = (rt_uint32_t *)stack_addr;
stk = (rt_uint32_t *)stack_addr;
*(--stk) = (rt_uint32_t)tentry; /* entry point */
*(--stk) = (rt_uint32_t)texit; /* lr */
@@ -70,11 +69,11 @@ rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
*(--stk) = 0xdeadbeef; /* r2 */
*(--stk) = 0xdeadbeef; /* r1 */
*(--stk) = (rt_uint32_t)parameter; /* r0 : argument */
/* cpsr */
if ((rt_uint32_t)tentry & 0x01)
*(--stk) = SVCMODE | 0x20; /* thumb mode */
else
*(--stk) = SVCMODE; /* arm mode */
/* cpsr */
if ((rt_uint32_t)tentry & 0x01)
*(--stk) = SVCMODE | 0x20; /* thumb mode */
else
*(--stk) = SVCMODE; /* arm mode */
/* return task's current stack address */
return (rt_uint8_t *)stk;