diff options
| author | SummerGift <[email protected]> | 2017-12-21 16:32:35 +0800 |
|---|---|---|
| committer | SummerGift <[email protected]> | 2017-12-21 16:37:38 +0800 |
| commit | fc7a5abc7635a1b37bd9202072f279e9930e5eb5 (patch) | |
| tree | c26660a6ef7df198c353a52a214ccb196f576efb /libcpu/arm/dm36x/stack.c | |
| parent | 336207ad31710b0022be9a9a79e72dde2bf48d67 (diff) | |
[libcpu]: add 8-byte alignment for arm architecture && optimize code format
Diffstat (limited to 'libcpu/arm/dm36x/stack.c')
| -rw-r--r-- | libcpu/arm/dm36x/stack.c | 70 |
1 files changed, 36 insertions, 34 deletions
diff --git a/libcpu/arm/dm36x/stack.c b/libcpu/arm/dm36x/stack.c index b41b0b859c..fd56e7a497 100644 --- a/libcpu/arm/dm36x/stack.c +++ b/libcpu/arm/dm36x/stack.c @@ -26,54 +26,56 @@ /*****************************/ /* CPU Mode */ /*****************************/ -#define USERMODE 0x10 -#define FIQMODE 0x11 -#define IRQMODE 0x12 -#define SVCMODE 0x13 -#define ABORTMODE 0x17 -#define UNDEFMODE 0x1b -#define MODEMASK 0x1f -#define NOINT 0xc0 +#define USERMODE 0x10 +#define FIQMODE 0x11 +#define IRQMODE 0x12 +#define SVCMODE 0x13 +#define ABORTMODE 0x17 +#define UNDEFMODE 0x1b +#define MODEMASK 0x1f +#define NOINT 0xc0 /** * This function will initialize thread stack * * @param tentry the entry of thread - * @param parameter the parameter of entry + * @param parameter the parameter of entry * @param stack_addr the beginning stack address * @param texit the function will be called when thread exit * * @return stack address */ rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, - rt_uint8_t *stack_addr, void *texit) + rt_uint8_t *stack_addr, void *texit) { - rt_uint32_t *stk; + rt_uint32_t *stk; - stk = (rt_uint32_t*)stack_addr; - *(stk) = (rt_uint32_t)tentry; /* entry point */ - *(--stk) = (rt_uint32_t)texit; /* lr */ - *(--stk) = 0; /* r12 */ - *(--stk) = 0; /* r11 */ - *(--stk) = 0; /* r10 */ - *(--stk) = 0; /* r9 */ - *(--stk) = 0; /* r8 */ - *(--stk) = 0; /* r7 */ - *(--stk) = 0; /* r6 */ - *(--stk) = 0; /* r5 */ - *(--stk) = 0; /* r4 */ - *(--stk) = 0; /* r3 */ - *(--stk) = 0; /* r2 */ - *(--stk) = 0; /* r1 */ - *(--stk) = (rt_uint32_t)parameter; /* r0 : argument */ + 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)tentry; /* entry point */ + *(--stk) = (rt_uint32_t)texit; /* lr */ + *(--stk) = 0xdeadbeef; /* r12 */ + *(--stk) = 0xdeadbeef; /* r11 */ + *(--stk) = 0xdeadbeef; /* r10 */ + *(--stk) = 0xdeadbeef; /* r9 */ + *(--stk) = 0xdeadbeef; /* r8 */ + *(--stk) = 0xdeadbeef; /* r7 */ + *(--stk) = 0xdeadbeef; /* r6 */ + *(--stk) = 0xdeadbeef; /* r5 */ + *(--stk) = 0xdeadbeef; /* r4 */ + *(--stk) = 0xdeadbeef; /* r3 */ + *(--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; + /* return task's current stack address */ + return (rt_uint8_t *)stk; } |