interrupt.c.svn-base

RT-Thread是发展中的下一代微内核嵌入式实时操作系统

/*
 * File      : trap.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://openlab.rt-thread.com/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 *                Triseel
 */
#include <rtthread.h>
#include "AT9200.h"

#define MAX_HANDLERS	32

extern rt_uint32 rt_interrupt_nest;

/* exception and interrupt handler table */
rt_isr_handler_t isr_table[MAX_HANDLERS];
rt_uint32 rt_interrupt_from_thread, rt_interrupt_to_thread;
rt_uint32 rt_thread_switch_interrput_flag;

/**
 * @addtogroup AT9200
 */
/*@{*/

/*dft int handler func*/
void rt_hw_interrupt_handle(int vector)
{
	REG_OUT32(AT9200_BASE_DBGU, AT9200_UART_THR_OFF, 0x39);
}

void rt_hw_interrupt_init(void)
{
	register int i;

	REG_OUT32(AT9200_AIC_IDCR, 0, 0xFFFFFFFF);  /*disable all ints*/
	REG_OUT32(AT9200_AIC_ICCR, 0, 0xFFFFFFFF);  /*clr all pending ints*/
	
	/*circlr 32 times to init all int trigger mode & prio & dft int handler func*/
	for (i=0;i<MAX_HANDLERS;i++)
	{
		/*cfg dft int handler func*/
		isr_table[i]=rt_hw_interrupt_handle;
		REG_OUT32(AT9200_AIC_SVR, i*4, isr_table[i]);
		
		/*cfg trigger mode & priority(edge trigger, lowest priority)*/
		REG_OUT32(AT9200_AIC_SMR, i*4, 0x20);
	}
	
	REG_OUT32(AT9200_AIC_SPU, 0, 0x20);  /*cfg spurious int vec reg*/
	REG_OUT32(AT9200_AIC_DCR, 0, 0x0 );  /*Protection Mode disabled, nIRQ and nFIQ lines are normally controlled by the AIC.*/
	
	/*clear AIC_EOICR 8 times*/
	for (i=0;i<8;i++)
	{
		REG_OUT32(AT9200_AIC_EOICR, 0, 0x0);
	}
	
	/* 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_interrput_flag = 0;
}

void rt_hw_interrupt_mask(int vector)
{
	if (vector<MAX_HANDLERS)
	{
		REG_OUT32(AT9200_AIC_IDCR, 0x00, 1<<vector);
	}
}

void rt_hw_interrupt_umask(int vector)
{
	if (vector<MAX_HANDLERS)
	{
		REG_OUT32(AT9200_AIC_IECR, 0x00, 1<<vector);
	}
}

void rt_hw_interrupt_install(int vector, rt_isr_handler_t new_handler, rt_isr_handler_t *old_handler)
{
	if (vector<MAX_HANDLERS)
	{
		if (old_handler!=RT_NULL) *old_handler=isr_table[vector];
			
		if ( new_handler!=RT_NULL) isr_table[vector]=new_handler;
	}
}




/*@}*/