90 lines
1.9 KiB
C
90 lines
1.9 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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* 2008-12-11 XuXinming first version
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*/
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#include <rtthread.h>
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#include "LPC24xx.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_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 LPC2478
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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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void rt_hw_interrupt_init()
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{
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register int i;
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rt_uint32_t *vect_addr, *vect_cntl;
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/* initialize VIC*/
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VICIntEnClr = 0xffffffff;
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VICVectAddr = 0;
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VICIntSelect = 0;
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for ( i = 0; i < 32; i++ )
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{
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vect_addr = (rt_uint32_t *)(VIC_BASE_ADDR + 0x100 + i*4);
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vect_cntl = (rt_uint32_t *)(VIC_BASE_ADDR + 0x200 + i*4);
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*vect_addr = 0x0;
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*vect_cntl = 0xF;
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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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void rt_hw_interrupt_mask(int vector)
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{
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VICIntEnClr = (1 << vector);
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}
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void rt_hw_interrupt_umask(int vector)
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{
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VICIntEnable = (1 << vector);
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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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rt_uint32_t *vect_addr;
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if(vector < MAX_HANDLERS)
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{
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/* find first un-assigned VIC address for the handler */
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vect_addr = (rt_uint32_t *)(VIC_BASE_ADDR + 0x100 + vector*4);
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/* get old handler */
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if (old_handler != RT_NULL) *old_handler = (rt_isr_handler_t)*vect_addr;
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*vect_addr = (rt_uint32_t)new_handler; /* set interrupt vector */
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}
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}
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/*@}*/
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