65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2020, Shenzhen Academy of Aerospace Technology
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2020-10-16 Dystopia the first version
|
|
*/
|
|
|
|
#include <rtthread.h>
|
|
|
|
/**
|
|
* 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;
|
|
int window_index;
|
|
int register_index;
|
|
|
|
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 -= 24;
|
|
stk -= 8;
|
|
|
|
for (register_index = 0; register_index != 8; register_index++)
|
|
stk[register_index] = 0xdeadbeef;
|
|
|
|
for (window_index = 0; window_index != 8; window_index++)
|
|
{
|
|
stk -= 16;
|
|
for (register_index = 0; register_index != 16; register_index++)
|
|
stk[register_index] = 0xdeadbeef;
|
|
if (window_index == 0)
|
|
{
|
|
stk[8] = (rt_uint32_t)parameter;
|
|
stk[15] = (rt_uint32_t)texit - 8;
|
|
}
|
|
}
|
|
|
|
stk -= 34;
|
|
for (register_index = 0; register_index != 34; register_index++)
|
|
stk[register_index] = 0;
|
|
|
|
stk -= 4;
|
|
stk[0] = (rt_uint32_t)tentry; //pc
|
|
stk[1] = (rt_uint32_t)tentry + 4; //npc
|
|
stk[2] = 0x10C7; //psr
|
|
stk[3] = 0x2; //wim
|
|
|
|
/* return task's current stack address */
|
|
return (rt_uint8_t *)stk;
|
|
}
|