/* * 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 * 2006-09-06     XuXinming    first version * 2006-09-15     Bernard      add interrupt bank 0..3 for more effective *                             in irq trap */#include <rtthread.h>#include "s3c44b0.h"#define MAX_HANDLERS	26extern 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;unsigned char interrupt_bank0[256];unsigned char interrupt_bank1[256];unsigned char interrupt_bank2[256];unsigned char interrupt_bank3[256];/** * @addtogroup S3C44B0 *//*@{*/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 */	INTMSK = 0x07ffffff;	/* clear pending register */   	I_ISPC = 0x03ffffff;	/* non-vector mode IRQ enable */	INTCON = 0x5;	/* all IRQ mode */	INTMOD = 0x0;	/* init exceptions table */	for(i=0; i<MAX_HANDLERS; i++)	{		isr_table[i] = rt_hw_interrupt_handle;	}	for ( i = 0; i < 256; i++)	{		interrupt_bank0[i] = 0;		interrupt_bank1[i] = 0;		interrupt_bank2[i] = 0;		interrupt_bank3[i] = 0;	}	/* setup interrupt bank table */	interrupt_bank0[1]	= 0;	interrupt_bank0[2]	= 1;	interrupt_bank0[4]	= 2;	interrupt_bank0[8]	= 3;	interrupt_bank0[16]	= 4;	interrupt_bank0[32]	= 5;	interrupt_bank0[64]	= 6;	interrupt_bank0[128]= 7;	interrupt_bank1[1]	= 8;	interrupt_bank1[2]	= 9;	interrupt_bank1[4]	= 10;	interrupt_bank1[8]	= 11;	interrupt_bank1[16]	= 12;	interrupt_bank1[32]	= 13;	interrupt_bank1[64]	= 14;	interrupt_bank1[128]= 15;	interrupt_bank2[1]	= 16;	interrupt_bank2[2]	= 17;	interrupt_bank2[4]	= 18;	interrupt_bank2[8]	= 19;	interrupt_bank2[16]	= 20;	interrupt_bank2[32]	= 21;	interrupt_bank2[64]	= 22;	interrupt_bank2[128]= 23;	interrupt_bank3[1]	= 24;	interrupt_bank3[2]	= 25;	/* 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){	INTMSK |= 1 << vector;}/** * This function will un-mask a interrupt. * @param vector the interrupt number */void rt_hw_interrupt_umask(int vector){	INTMSK &= ~(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;	}}/*@}*/