1 /*
2 * Copyright (c) 2006-2018, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2008-12-11 XuXinming first version
9 * 2013-03-29 aozima Modify the interrupt interface implementations.
10 */
11
12 #include <rtthread.h>
13 #include <rthw.h>
14
15 #include <sys_vim.h>
16 #include <system.h>
17
18 #include "armv7.h"
19
20 #define MAX_HANDLERS 96
21
22 /* exception and interrupt handler table */
23 struct rt_irq_desc irq_desc[MAX_HANDLERS];
24
25 extern volatile rt_uint8_t rt_interrupt_nest;
26
27 /* exception and interrupt handler table */
28 rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
29 rt_uint32_t rt_thread_switch_interrupt_flag;
30
31 /**
32 * @addtogroup RM48x50
33 */
34
35 /*@{*/
36
rt_hw_int_not_handle(int vector,void * param)37 static void rt_hw_int_not_handle(int vector, void *param)
38 {
39 rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
40 }
41
42 #define vimRAM (0xFFF82000U)
43
rt_hw_interrupt_init(void)44 void rt_hw_interrupt_init(void)
45 {
46 register int i;
47
48 rt_uint32_t *vect_addr;
49
50 /* the initialization is done in sys_startup.c */
51
52 /* init exceptions table */
53 rt_memset(irq_desc, 0x00, sizeof(irq_desc));
54 for(i=0; i < MAX_HANDLERS; i++)
55 {
56 irq_desc[i].handler = rt_hw_int_not_handle;
57
58 vect_addr = (rt_uint32_t *)(vimRAM + i*4);
59 *vect_addr = (rt_uint32_t)&irq_desc[i];
60 }
61
62 /* init interrupt nest, and context in thread sp */
63 rt_interrupt_nest = 0;
64 rt_interrupt_from_thread = 0;
65 rt_interrupt_to_thread = 0;
66 rt_thread_switch_interrupt_flag = 0;
67 }
68
rt_hw_interrupt_mask(int vector)69 void rt_hw_interrupt_mask(int vector)
70 {
71 vimDisableInterrupt(vector);
72 }
73
rt_hw_interrupt_umask(int vector)74 void rt_hw_interrupt_umask(int vector)
75 {
76 vimEnableInterrupt(vector, SYS_IRQ);
77 }
78
79 /**
80 * This function will install a interrupt service routine to a interrupt.
81 * @param vector the interrupt number
82 * @param handler the interrupt service routine to be installed
83 * @param param the parameter for interrupt service routine
84 * @name unused.
85 *
86 * @return the old handler
87 */
rt_hw_interrupt_install(int vector,rt_isr_handler_t handler,void * param,const char * name)88 rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
89 void *param, const char *name)
90 {
91 rt_isr_handler_t old_handler = RT_NULL;
92
93 if(vector >= 0 && vector < MAX_HANDLERS)
94 {
95 old_handler = irq_desc[vector].handler;
96 if (handler != RT_NULL)
97 {
98 irq_desc[vector].handler = handler;
99 irq_desc[vector].param = param;
100 }
101 }
102
103 return old_handler;
104 }
105
106 /*@}*/
107