123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/*
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* File : trap.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://openlab.rt-thread.com/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2006-03-13 Bernard first version
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*/
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#include <rtthread.h>
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#include <sep4020.h>
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#define MAX_HANDLERS 32
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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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/**
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* @addtogroup S3C24X0
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*/
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/*@{*/
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rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t vector)
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{
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rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
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return RT_NULL;
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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 rt_uint32_t idx;
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/*Make sure all intc registers in proper state*/
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/*mask all the irq*/
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*(RP)(INTC_IMR) = 0xFFFFFFFF;
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/*enable all the irq*/
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*(RP)(INTC_IER) = 0XFFFFFFFF;
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/*Dont use any forced irq*/
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*(RP)(INTC_IFR) = 0x0;
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/*Disable all the fiq*/
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*(RP)(INTC_FIER) = 0x0;
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/*Mask all the fiq*/
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*(RP)(INTC_FIMR) = 0x0F;
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/*Dont use forced fiq*/
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*(RP)(INTC_FIFR) = 0x0;
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/*Intrrupt priority register*/
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*(RP)(INTC_IPLR) = 0x0;
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/* init exceptions table */
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for(idx=0; idx < MAX_HANDLERS; idx++)
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{
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isr_table[idx] = (rt_isr_handler_t)rt_hw_interrupt_handle;
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}
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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(rt_uint32_t vector)
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{
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*(RP)(INTC_IMR) |= 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(rt_uint32_t vector)
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{
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if(vector == 16)
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{
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rt_kprintf("Interrupt vec %d is not used!\n", vector);
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}
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else
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*(RP)(INTC_IMR) &= ~(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(rt_uint32_t 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)
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*old_handler = isr_table[vector];
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if (new_handler != RT_NULL)
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isr_table[vector] = new_handler;
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}
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}
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/*@}*/
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