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- /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2006-03-13 Bernard the first version
- */
- #include <rtthread.h>
- #include <sep4020.h>
- /**
- * @addtogroup S3C24X0
- */
- /*@{*/
- /**
- * This function will initialize thread stack
- *
- * @param tentry the entry of thread
- * @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_uint32_t *stk;
- 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 */
- *(--stk) = Mode_SVC; /* cpsr */
- *(--stk) = Mode_SVC; /* spsr */
- /* return task's current stack address */
- return (rt_uint8_t *)stk;
- }
- /*@}*/
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