1*10465441SEvalZero /*
2*10465441SEvalZero * Copyright (c) 2006-2018, RT-Thread Development Team
3*10465441SEvalZero *
4*10465441SEvalZero * SPDX-License-Identifier: Apache-2.0
5*10465441SEvalZero *
6*10465441SEvalZero * Change Logs:
7*10465441SEvalZero * Date Author Notes
8*10465441SEvalZero * 2006-08-23 Bernard first version
9*10465441SEvalZero * 2013-03-29 aozima Modify the interrupt interface implementations.
10*10465441SEvalZero */
11*10465441SEvalZero
12*10465441SEvalZero #include <rtthread.h>
13*10465441SEvalZero #include <rthw.h>
14*10465441SEvalZero #include "AT91SAM7X256.h"
15*10465441SEvalZero
16*10465441SEvalZero #define MAX_HANDLERS 32
17*10465441SEvalZero
18*10465441SEvalZero /* exception and interrupt handler table */
19*10465441SEvalZero struct rt_irq_desc irq_desc[MAX_HANDLERS];
20*10465441SEvalZero
21*10465441SEvalZero extern rt_uint32_t rt_interrupt_nest;
22*10465441SEvalZero
23*10465441SEvalZero rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
24*10465441SEvalZero rt_uint32_t rt_thread_switch_interrupt_flag;
25*10465441SEvalZero
26*10465441SEvalZero /**
27*10465441SEvalZero * @addtogroup AT91SAM7
28*10465441SEvalZero */
29*10465441SEvalZero /*@{*/
30*10465441SEvalZero
rt_hw_interrupt_handler(int vector,void * param)31*10465441SEvalZero static void rt_hw_interrupt_handler(int vector, void *param)
32*10465441SEvalZero {
33*10465441SEvalZero rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
34*10465441SEvalZero }
35*10465441SEvalZero
36*10465441SEvalZero /**
37*10465441SEvalZero * This function will initialize hardware interrupt
38*10465441SEvalZero */
rt_hw_interrupt_init(void)39*10465441SEvalZero void rt_hw_interrupt_init(void)
40*10465441SEvalZero {
41*10465441SEvalZero rt_base_t index;
42*10465441SEvalZero
43*10465441SEvalZero /* init exceptions table */
44*10465441SEvalZero for(index=0; index < MAX_HANDLERS; index++)
45*10465441SEvalZero {
46*10465441SEvalZero irq_desc[index].handler = (rt_isr_handler_t)rt_hw_interrupt_handler;
47*10465441SEvalZero irq_desc[index].param = RT_NULL;
48*10465441SEvalZero }
49*10465441SEvalZero
50*10465441SEvalZero for (index = 0; index < MAX_HANDLERS; index ++)
51*10465441SEvalZero {
52*10465441SEvalZero AT91C_BASE_AIC->AIC_SVR[index] = (rt_uint32_t)rt_hw_interrupt_handler;
53*10465441SEvalZero }
54*10465441SEvalZero
55*10465441SEvalZero /* init interrupt nest, and context in thread sp */
56*10465441SEvalZero rt_interrupt_nest = 0;
57*10465441SEvalZero rt_interrupt_from_thread = 0;
58*10465441SEvalZero rt_interrupt_to_thread = 0;
59*10465441SEvalZero rt_thread_switch_interrupt_flag = 0;
60*10465441SEvalZero }
61*10465441SEvalZero
62*10465441SEvalZero /**
63*10465441SEvalZero * This function will mask a interrupt.
64*10465441SEvalZero * @param vector the interrupt number
65*10465441SEvalZero */
rt_hw_interrupt_mask(int vector)66*10465441SEvalZero void rt_hw_interrupt_mask(int vector)
67*10465441SEvalZero {
68*10465441SEvalZero /* disable interrupt */
69*10465441SEvalZero AT91C_BASE_AIC->AIC_IDCR = 1 << vector;
70*10465441SEvalZero
71*10465441SEvalZero /* clear interrupt */
72*10465441SEvalZero AT91C_BASE_AIC->AIC_ICCR = 1 << vector;
73*10465441SEvalZero }
74*10465441SEvalZero
75*10465441SEvalZero /**
76*10465441SEvalZero * This function will un-mask a interrupt.
77*10465441SEvalZero * @param vector the interrupt number
78*10465441SEvalZero */
rt_hw_interrupt_umask(int vector)79*10465441SEvalZero void rt_hw_interrupt_umask(int vector)
80*10465441SEvalZero {
81*10465441SEvalZero AT91C_BASE_AIC->AIC_IECR = 1 << vector;
82*10465441SEvalZero }
83*10465441SEvalZero
84*10465441SEvalZero /**
85*10465441SEvalZero * This function will install a interrupt service routine to a interrupt.
86*10465441SEvalZero * @param vector the interrupt number
87*10465441SEvalZero * @param handler the interrupt service routine to be installed
88*10465441SEvalZero * @param param the parameter for interrupt service routine
89*10465441SEvalZero * @name unused.
90*10465441SEvalZero *
91*10465441SEvalZero * @return the old handler
92*10465441SEvalZero */
rt_hw_interrupt_install(int vector,rt_isr_handler_t handler,void * param,const char * name)93*10465441SEvalZero rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
94*10465441SEvalZero void *param, const char *name)
95*10465441SEvalZero {
96*10465441SEvalZero rt_isr_handler_t old_handler = RT_NULL;
97*10465441SEvalZero if(vector >= 0 && vector < MAX_HANDLERS)
98*10465441SEvalZero {
99*10465441SEvalZero old_handler = irq_desc[vector].handler;
100*10465441SEvalZero if (handler != RT_NULL)
101*10465441SEvalZero {
102*10465441SEvalZero irq_desc[vector].handler = (rt_isr_handler_t)handler;
103*10465441SEvalZero irq_desc[vector].param = param;
104*10465441SEvalZero }
105*10465441SEvalZero }
106*10465441SEvalZero
107*10465441SEvalZero return old_handler;
108*10465441SEvalZero }
109*10465441SEvalZero
110*10465441SEvalZero /*@}*/
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