blob: a2d405ccddab980c8d32cd2cdbad503664d6d00d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* 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;
}
/** shutdown CPU */
void rt_hw_cpu_shutdown(void)
{
rt_uint32_t level;
rt_kprintf("shutdown...\n");
level = rt_hw_interrupt_disable();
while (level)
{
RT_ASSERT(0);
}
}
|
