You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
2.6 KiB
110 lines
2.6 KiB
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2006-08-23 Bernard first version
|
|
* 2013-03-29 aozima Modify the interrupt interface implementations.
|
|
*/
|
|
|
|
#include <rtthread.h>
|
|
#include <rthw.h>
|
|
#include "AT91SAM7X256.h"
|
|
|
|
#define MAX_HANDLERS 32
|
|
|
|
/* exception and interrupt handler table */
|
|
struct rt_irq_desc irq_desc[MAX_HANDLERS];
|
|
|
|
extern rt_uint32_t rt_interrupt_nest;
|
|
|
|
rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
|
|
rt_uint32_t rt_thread_switch_interrupt_flag;
|
|
|
|
/**
|
|
* @addtogroup AT91SAM7
|
|
*/
|
|
/*@{*/
|
|
|
|
static void rt_hw_interrupt_handler(int vector, void *param)
|
|
{
|
|
rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
|
|
}
|
|
|
|
/**
|
|
* This function will initialize hardware interrupt
|
|
*/
|
|
void rt_hw_interrupt_init(void)
|
|
{
|
|
rt_base_t index;
|
|
|
|
/* init exceptions table */
|
|
for(index=0; index < MAX_HANDLERS; index++)
|
|
{
|
|
irq_desc[index].handler = (rt_isr_handler_t)rt_hw_interrupt_handler;
|
|
irq_desc[index].param = RT_NULL;
|
|
}
|
|
|
|
for (index = 0; index < MAX_HANDLERS; index ++)
|
|
{
|
|
AT91C_BASE_AIC->AIC_SVR[index] = (rt_uint32_t)rt_hw_interrupt_handler;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
/* disable interrupt */
|
|
AT91C_BASE_AIC->AIC_IDCR = 1 << vector;
|
|
|
|
/* clear interrupt */
|
|
AT91C_BASE_AIC->AIC_ICCR = 1 << vector;
|
|
}
|
|
|
|
/**
|
|
* This function will un-mask a interrupt.
|
|
* @param vector the interrupt number
|
|
*/
|
|
void rt_hw_interrupt_umask(int vector)
|
|
{
|
|
AT91C_BASE_AIC->AIC_IECR = 1 << vector;
|
|
}
|
|
|
|
/**
|
|
* This function will install a interrupt service routine to a interrupt.
|
|
* @param vector the interrupt number
|
|
* @param handler the interrupt service routine to be installed
|
|
* @param param the parameter for interrupt service routine
|
|
* @name unused.
|
|
*
|
|
* @return the old handler
|
|
*/
|
|
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 >= 0 && vector < MAX_HANDLERS)
|
|
{
|
|
old_handler = irq_desc[vector].handler;
|
|
if (handler != RT_NULL)
|
|
{
|
|
irq_desc[vector].handler = (rt_isr_handler_t)handler;
|
|
irq_desc[vector].param = param;
|
|
}
|
|
}
|
|
|
|
return old_handler;
|
|
}
|
|
|
|
/*@}*/
|
|
|