?? interrupt.c
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/* * 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 "s3c2410.h"#define MAX_HANDLERS 32extern 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 S3C2410 *//*@{*/rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t vector){ rt_kprintf("Unhandled interrupt %d occured!!!\n", vector); return RT_NULL;}/** * This function will initialize hardware interrupt */void rt_hw_interrupt_init(){ register rt_uint32_t idx; /* all clear source pending */ SRCPND = 0x0; /* all clear sub source pending */ SUBSRCPND = 0x0; /* all=IRQ mode */ INTMOD = 0x0; /* all interrupt disabled include global bit */ INTMSK = BIT_ALLMSK; /* all sub interrupt disable */ INTSUBMSK = BIT_SUB_ALLMSK; /* all clear interrupt pending */ INTPND = BIT_ALLMSK; /* init exceptions table */ for(idx=0; idx < MAX_HANDLERS; idx++) { isr_table[idx] = (rt_isr_handler_t)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(rt_uint32_t vector){ INTMSK |= 1 << vector;}/** * This function will un-mask a interrupt. * @param vector the interrupt number */void rt_hw_interrupt_umask(rt_uint32_t vector){ if (vector == INTNOTUSED6) { rt_kprintf("Interrupt vec %d is not used!\n", vector); // while(1); } else if (vector == INTGLOBAL) INTMSK = 0x0; else 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(rt_uint32_t 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; }}/*@}*/
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