blob: f8e304fe1f3cc7dee3c80e15a4b6ef89321f5f6d (
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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2011-02-23 Bernard the first version
* 2012-09-23 lgnq set the texit to R31
*/
#include <rtthread.h>
extern volatile rt_atomic_t rt_interrupt_nest;
/* switch flag on interrupt and thread pointer to save switch record */
rt_uint32_t rt_interrupt_from_thread;
rt_uint32_t rt_interrupt_to_thread;
rt_uint32_t rt_thread_switch_interrupt_flag;
/**
* This function will initialize hardware interrupt
*/
void rt_hw_interrupt_init(void)
{
/* init interrupt nest, and context in thread sp */
rt_interrupt_nest = 0;
rt_interrupt_from_thread = 0;
rt_interrupt_to_thread = 0;
rt_thread_switch_interrupt_flag = 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;
stk = (rt_uint32_t *)stack_addr; /* Load stack pointer */
*(--stk) = (rt_uint32_t)0x23232323; /* r23 */
*(--stk) = (rt_uint32_t)0x24242424; /* r24 */
*(--stk) = (rt_uint32_t)0x25252525; /* r25 */
*(--stk) = (rt_uint32_t)0x26262626; /* r26 */
*(--stk) = (rt_uint32_t)0x27272727; /* r27 */
*(--stk) = (rt_uint32_t)0x28282828; /* r28 */
*(--stk) = (rt_uint32_t)0x29292929; /* r29 */
*(--stk) = (rt_uint32_t)0x30303030; /* r30 */
*(--stk) = (rt_uint32_t)texit; /* r31 */
*(--stk) = (rt_uint32_t)0x00000000; /* Task PSW = Interrupts enabled */
*(--stk) = (rt_uint32_t)tentry; /* Task's PC */
*(--stk) = (rt_uint32_t)0x16161616; /* r16 */
*(--stk) = (rt_uint32_t)0x15151515; /* r15 */
*(--stk) = (rt_uint32_t)0x14141414; /* r14 */
*(--stk) = (rt_uint32_t)0x13131313; /* r13 */
*(--stk) = (rt_uint32_t)0x12121212; /* r12 */
*(--stk) = (rt_uint32_t)0x11111111; /* r11 */
*(--stk) = (rt_uint32_t)0x10101010; /* r10 */
*(--stk) = (rt_uint32_t)0x09090909; /* r9 */
*(--stk) = (rt_uint32_t)0x08080808; /* r8 */
*(--stk) = (rt_uint32_t)0x07070707; /* r7 */
*(--stk) = (rt_uint32_t)0x06060606; /* r6 */
*(--stk) = (rt_uint32_t)0x05050505; /* r5 */
*(--stk) = (rt_uint32_t)0x02020202; /* r2 */
*(--stk) = (rt_uint32_t)parameter; /* r1 */
return ((rt_uint8_t *)stk);
}
void rt_hw_context_switch(rt_uint32_t from, rt_uint32_t to)
{
rt_interrupt_from_thread = from;
rt_interrupt_to_thread = to;
asm("trap 0x10");
}
void rt_hw_context_switch_interrupt(rt_uint32_t from, rt_uint32_t to)
{
if (rt_thread_switch_interrupt_flag != 1)
{
rt_thread_switch_interrupt_flag = 1;
rt_interrupt_from_thread = from;
}
rt_interrupt_to_thread = to;
}
|
