145 lines
3.3 KiB
C
145 lines
3.3 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2006-09-06 XuXinming first version
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* 2006-09-15 Bernard add interrupt bank 0..3 for more effective
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* in irq trap
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*/
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#include <rtthread.h>
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#include "s3c44b0.h"
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#define MAX_HANDLERS 26
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extern rt_uint32_t rt_interrupt_nest;
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/* exception and interrupt handler table */
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rt_isr_handler_t isr_table[MAX_HANDLERS];
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rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
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rt_uint32_t rt_thread_switch_interrupt_flag;
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unsigned char interrupt_bank0[256];
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unsigned char interrupt_bank1[256];
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unsigned char interrupt_bank2[256];
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unsigned char interrupt_bank3[256];
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/**
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* @addtogroup S3C44B0
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*/
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/*@{*/
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void rt_hw_interrupt_handle(int vector)
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{
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rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
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}
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/**
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* This function will initialize hardware interrupt
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*/
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void rt_hw_interrupt_init()
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{
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register int i;
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/* all interrupt disabled include global bit */
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INTMSK = 0x07ffffff;
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/* clear pending register */
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I_ISPC = 0x03ffffff;
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/* non-vector mode IRQ enable */
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INTCON = 0x5;
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/* all IRQ mode */
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INTMOD = 0x0;
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/* init exceptions table */
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for(i=0; i<MAX_HANDLERS; i++)
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{
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isr_table[i] = rt_hw_interrupt_handle;
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}
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for ( i = 0; i < 256; i++)
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{
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interrupt_bank0[i] = 0;
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interrupt_bank1[i] = 0;
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interrupt_bank2[i] = 0;
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interrupt_bank3[i] = 0;
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}
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/* setup interrupt bank table */
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interrupt_bank0[1] = 0;
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interrupt_bank0[2] = 1;
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interrupt_bank0[4] = 2;
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interrupt_bank0[8] = 3;
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interrupt_bank0[16] = 4;
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interrupt_bank0[32] = 5;
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interrupt_bank0[64] = 6;
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interrupt_bank0[128]= 7;
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interrupt_bank1[1] = 8;
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interrupt_bank1[2] = 9;
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interrupt_bank1[4] = 10;
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interrupt_bank1[8] = 11;
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interrupt_bank1[16] = 12;
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interrupt_bank1[32] = 13;
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interrupt_bank1[64] = 14;
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interrupt_bank1[128]= 15;
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interrupt_bank2[1] = 16;
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interrupt_bank2[2] = 17;
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interrupt_bank2[4] = 18;
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interrupt_bank2[8] = 19;
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interrupt_bank2[16] = 20;
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interrupt_bank2[32] = 21;
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interrupt_bank2[64] = 22;
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interrupt_bank2[128]= 23;
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interrupt_bank3[1] = 24;
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interrupt_bank3[2] = 25;
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/* init interrupt nest, and context in thread sp */
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rt_interrupt_nest = 0;
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rt_interrupt_from_thread = 0;
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rt_interrupt_to_thread = 0;
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rt_thread_switch_interrupt_flag = 0;
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}
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/**
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* This function will mask a interrupt.
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* @param vector the interrupt number
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*/
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void rt_hw_interrupt_mask(int vector)
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{
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INTMSK |= 1 << vector;
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}
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/**
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* This function will un-mask a interrupt.
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* @param vector the interrupt number
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*/
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void rt_hw_interrupt_umask(int vector)
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{
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INTMSK &= ~(1 << vector);
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}
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/**
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* This function will install a interrupt service routine to a interrupt.
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* @param vector the interrupt number
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* @param new_handler the interrupt service routine to be installed
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* @param old_handler the old interrupt service routine
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*/
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void rt_hw_interrupt_install(int vector, rt_isr_handler_t new_handler, rt_isr_handler_t *old_handler)
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{
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if(vector < MAX_HANDLERS)
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{
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if (old_handler != RT_NULL) *old_handler = isr_table[vector];
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if (new_handler != RT_NULL) isr_table[vector] = new_handler;
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}
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}
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/*@}*/
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