134 lines
3.1 KiB
C
134 lines
3.1 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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* 2010-07-09 Bernard first version
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*/
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#include <rthw.h>
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#include "jz47xx.h"
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#define JZ47XX_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[JZ47XX_MAX_INTR];
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/**
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* @addtogroup Jz47xx
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*/
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/*@{*/
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void rt_hw_interrupt_handler(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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rt_int32_t index;
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rt_memset(irq_handle_table, 0x00, sizeof(irq_handle_table));
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for (index = 0; index < JZ47XX_MAX_INTR; index ++)
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{
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irq_handle_table[index].handler = (rt_isr_handler_t)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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INTC_IMSR = (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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INTC_IMCR = (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 handler the interrupt service routine to be installed
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* @param param the interrupt service function parameter
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* @param name the interrupt name
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* @return old handler
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*/
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rt_isr_handler_t rt_hw_interrupt_install(int vector,
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rt_isr_handler_t handler,
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void *param,
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char *name)
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{
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rt_isr_handler_t old_handler = RT_NULL;
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if (vector >= 0 && vector < JZ47XX_MAX_INTR)
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{
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old_handler = irq_handle_table[vector].handler;
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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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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 i;
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rt_isr_handler_t irq_func;
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static rt_uint32_t pending = 0;
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/* the hardware interrupt */
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pending |= INTC_IPR;
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if (!pending) return;
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for (i = JZ47XX_MAX_INTR; i > 0; --i)
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{
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if ((pending & (1<<i)))
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{
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pending &= ~(1<<i);
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irq_func = irq_handle_table[i].handler;
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/* do interrupt */
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(*irq_func)(i, irq_handle_table[i].param);
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#ifdef RT_USING_INTERRUPT_INFO
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irq_handle_table[i].counter++;
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#endif /* RT_USING_INTERRUPT_INFO */
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/* ack interrupt */
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INTC_IPR = (1 << i);
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}
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}
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}
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/*@}*/
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