153 lines
3.5 KiB
C
153 lines
3.5 KiB
C
/*
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* File : interrupt.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2010, 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://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-10-15 Bernard first version
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* 2013-03-29 aozima Modify the interrupt interface implementations.
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include "soc3210.h"
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#define MAX_INTR 32
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extern rt_uint32_t rt_interrupt_nest;
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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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static struct rt_irq_desc irq_handle_table[MAX_INTR];
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void rt_interrupt_dispatch(void *ptreg);
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void rt_hw_timer_handler();
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/**
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* @addtogroup Loongson SoC3210
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*/
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/*@{*/
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static void rt_hw_interrupt_handler(int vector, void *param)
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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(void)
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{
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rt_int32_t idx;
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rt_memset(irq_handle_table, 0x00, sizeof(irq_handle_table));
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for (idx = 0; idx < MAX_INTR; idx ++)
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{
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irq_handle_table[idx].handler = rt_hw_interrupt_handler;
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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(int vector)
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{
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/* mask interrupt */
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INT_EN &= ~(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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INT_EN |= (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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rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
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void *param, char *name)
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{
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rt_isr_handler_t old_handler = RT_NULL;
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if(vector < MAX_INTR)
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{
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old_handler = irq_handle_table[vector].handler;
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if (handler != RT_NULL)
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{
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#ifdef RT_USING_INTERRUPT_INFO
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rt_strncpy(irq_handle_table[vector].name, name, RT_NAME_MAX);
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#endif /* RT_USING_INTERRUPT_INFO */
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irq_handle_table[vector].handler = handler;
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irq_handle_table[vector].param = param;
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}
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}
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return old_handler;
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}
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void rt_interrupt_dispatch(void *ptreg)
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{
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int irq;
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void *param;
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rt_isr_handler_t irq_func;
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static rt_uint32_t status = 0;
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rt_uint32_t c0_status;
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/* check os timer */
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c0_status = read_c0_status();
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if (c0_status & 0x8000)
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{
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rt_hw_timer_handler();
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}
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if (c0_status & 0x0400)
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{
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/* the hardware interrupt */
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status |= INT_ISR;
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if (!status) return;
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for (irq = MAX_INTR; irq > 0; --irq)
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{
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if ((status & (1 << irq)))
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{
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status &= ~(1 << irq);
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irq_func = irq_handle_table[irq].handler;
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param = irq_handle_table[irq].param;
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/* do interrupt */
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(*irq_func)(irq, param);
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#ifdef RT_USING_INTERRUPT_INFO
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irq_handle_table[irq].counter++;
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#endif /* RT_USING_INTERRUPT_INFO */
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/* ack interrupt */
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INT_CLR = (1 << irq);
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}
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}
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}
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}
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/*@}*/
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