diff options
Diffstat (limited to 'bsp')
| -rw-r--r-- | bsp/qemu-vexpress-a9/cpu/stack.c | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/bsp/qemu-vexpress-a9/cpu/stack.c b/bsp/qemu-vexpress-a9/cpu/stack.c index dfcc6ea8df..dfb97557bc 100644 --- a/bsp/qemu-vexpress-a9/cpu/stack.c +++ b/bsp/qemu-vexpress-a9/cpu/stack.c @@ -31,39 +31,41 @@ * @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 */ - /* cpsr */ - if ((rt_uint32_t)tentry & 0x01) - *(--stk) = SVCMODE | 0x20; /* thumb mode */ - else - *(--stk) = SVCMODE; /* arm mode */ + 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) = 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 */ + /* cpsr */ + if ((rt_uint32_t)tentry & 0x01) + *(--stk) = SVCMODE | 0x20; /* thumb mode */ + else + *(--stk) = SVCMODE; /* arm mode */ #ifdef RT_USING_LWP - *(--stk) = 0; /* user lr */ - *(--stk) = 0; /* user sp*/ + *(--stk) = 0; /* user lr */ + *(--stk) = 0; /* user sp*/ #endif - /* return task's current stack address */ - return (rt_uint8_t *)stk; + /* return task's current stack address */ + return (rt_uint8_t *)stk; } /*@}*/ |