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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2011-02-14 aozima first implementation for Nios II.
*/
#include <rtthread.h>
/**
* @addtogroup NIOS_II
*/
/*@{*/
/**
* 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)
{
unsigned long *stk;
stk = (unsigned long *)stack_addr;
*(stk) = 0x01; /* status */
*(--stk) = (unsigned long)texit; /* ra */
*(--stk) = 0xdeadbeef; /* fp */
*(--stk) = 0xdeadbeef; /* r23 */
*(--stk) = 0xdeadbeef; /* r22 */
*(--stk) = 0xdeadbeef; /* r21 */
*(--stk) = 0xdeadbeef; /* r20 */
*(--stk) = 0xdeadbeef; /* r19 */
*(--stk) = 0xdeadbeef; /* r18 */
*(--stk) = 0xdeadbeef; /* r17 */
*(--stk) = 0xdeadbeef; /* r16 */
// *(--stk) = 0xdeadbeef; /* r15 */
// *(--stk) = 0xdeadbeef; /* r14 */
// *(--stk) = 0xdeadbeef; /* r13 */
// *(--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) = (unsigned long)parameter; /* r4 argument */
*(--stk) = 0xdeadbeef; /* r3 */
*(--stk) = 0xdeadbeef; /* r2 */
*(--stk) = (unsigned long)tentry; /* pc */
// *(stk) = (unsigned long)tentry; /* thread entry (ra) */
// *(--stk) = (unsigned long)parameter; /* thread argument, r4 */
/* return task's current stack address */
return (rt_uint8_t *)stk;
}
/*@}*/
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