interrupt.c
2.46 KB
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
97
98
/*
* 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 <rthw.h>
#include <rtthread.h>
#include "bm3803.h"
#include "interrupt.h"
#define MAX_HANDLERS 256
extern volatile rt_uint8_t rt_interrupt_nest;
struct rt_irq_desc isr_table[MAX_HANDLERS];
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 exceptions table */
rt_memset(isr_table, 0x00, sizeof(isr_table));
/* 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 mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_mask(int vector)
{
if (vector > 0x1F || vector < 0x11)
return;
volatile struct lregs *regs = (struct lregs *)PREGS;
regs->irqmask &= ~(1 << (vector - 0x10));
}
/**
* This function will un-mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_umask(int vector)
{
if (vector > 0x1F || vector < 0x11)
return;
volatile struct lregs *regs = (struct lregs *)PREGS;
regs->irqmask |= 1 << (vector - 0x10);
}
/**
* This function will install a interrupt service routine to a interrupt.
* @param vector the interrupt number
* @param new_handler the interrupt service routine to be installed
* @param old_handler the old interrupt service routine
*/
rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
void *param, const char *name)
{
rt_isr_handler_t old_handler = RT_NULL;
if (vector < MAX_HANDLERS || vector >= 0)
{
old_handler = isr_table[vector].handler;
if (handler != RT_NULL)
{
#ifdef RT_USING_INTERRUPT_INFO
rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
#endif /* RT_USING_INTERRUPT_INFO */
isr_table[vector].handler = handler;
isr_table[vector].param = param;
}
}
return old_handler;
}
void rt_hw_interrupt_clear(int vector)
{
if (vector > 0x1F || vector < 0x11)
return;
volatile struct lregs *regs = (struct lregs *)PREGS;
regs->irqclear |= 1 << (vector - 0x10);
}