/* * 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 * 2006-03-13     Bernard      first version */#include <rtthread.h>#include "s3c4510.h"#define MAX_HANDLERS	21extern rt_uint32_t rt_interrupt_nest;/* exception and interrupt handler table */rt_isr_handler_t isr_table[MAX_HANDLERS];rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;rt_uint32_t rt_thread_switch_interrput_flag;/** * @addtogroup S3C4510 *//*@{*/void rt_hw_interrupt_handle(int vector){	rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);}/** * This function will initialize hardware interrupt */void rt_hw_interrupt_init(){	register int i;	/* all interrupt disabled include global bit */    INTMASK = 0x3fffff;	/* all clear pending */	INTPEND = 0x1fffff;	/* all=IRQ mode */	INTMODE = 0x0;	/* init exceptions table */	for(i=0; i<MAX_HANDLERS; i++)	{		isr_table[i] = rt_hw_interrupt_handle;	}	/* 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;}/** * This function will mask a interrupt. * @param vector the interrupt number */void rt_hw_interrupt_mask(int vector){	INTMASK |= 1 << vector;}/** * This function will un-mask a interrupt. * @param vector the interrupt number */void rt_hw_interrupt_umask(int vector){	INTMASK &= ~(1 << vector);}/** * 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 */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;	}}/*@}*/