55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
|
|
* Copyright (c) 2020-2020, Bluetrum Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2020/11/18 greedyhao Bluetrum RISC-V porting code.
|
|
*/
|
|
|
|
#include <rthw.h>
|
|
#include <rtthread.h>
|
|
|
|
volatile rt_ubase_t rt_interrupt_from_thread = 0;
|
|
volatile rt_ubase_t rt_interrupt_to_thread = 0;
|
|
volatile rt_uint32_t rt_thread_switch_interrupt_flag = 0;
|
|
rt_uint32_t rt_cur_thread_sp = 0;
|
|
|
|
/**
|
|
* 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;
|
|
register int *tp asm("x3");
|
|
|
|
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--;
|
|
*stk = (rt_uint32_t)0x10003; /* Start address */
|
|
stk--;
|
|
*stk = (rt_uint32_t)tentry; /* Start address */
|
|
stk -= 22;
|
|
*stk = (rt_uint32_t)parameter; /* Register a0 parameter*/
|
|
stk -= 6;
|
|
*stk = (rt_uint32_t)tp; /* Register thread pointer */
|
|
stk --;
|
|
*stk = (rt_uint32_t)texit; /* Register ra texit*/
|
|
|
|
/* return task's current stack address */
|
|
return (rt_uint8_t *)stk;
|
|
}
|