123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
/*
|
|
* 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 <sep4020.h>
|
|
|
|
#define MAX_HANDLERS 32
|
|
|
|
extern 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_interrupt_flag;
|
|
|
|
/**
|
|
* @addtogroup S3C24X0
|
|
*/
|
|
/*@{*/
|
|
|
|
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;
|
|
|
|
/*Make sure all intc registers in proper state*/
|
|
|
|
/*mask all the irq*/
|
|
*(RP)(INTC_IMR) = 0xFFFFFFFF;
|
|
|
|
/*enable all the irq*/
|
|
*(RP)(INTC_IER) = 0XFFFFFFFF;
|
|
|
|
/*Dont use any forced irq*/
|
|
*(RP)(INTC_IFR) = 0x0;
|
|
|
|
/*Disable all the fiq*/
|
|
*(RP)(INTC_FIER) = 0x0;
|
|
|
|
/*Mask all the fiq*/
|
|
*(RP)(INTC_FIMR) = 0x0F;
|
|
|
|
/*Dont use forced fiq*/
|
|
*(RP)(INTC_FIFR) = 0x0;
|
|
|
|
/*Intrrupt priority register*/
|
|
*(RP)(INTC_IPLR) = 0x0;
|
|
|
|
/* 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_interrupt_flag = 0;
|
|
}
|
|
|
|
/**
|
|
* This function will mask a interrupt.
|
|
* @param vector the interrupt number
|
|
*/
|
|
void rt_hw_interrupt_mask(rt_uint32_t vector)
|
|
{
|
|
*(RP)(INTC_IMR) |= 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 == 16)
|
|
{
|
|
rt_kprintf("Interrupt vec %d is not used!\n", vector);
|
|
}
|
|
else
|
|
*(RP)(INTC_IMR) &= ~(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;
|
|
}
|
|
}
|
|
|
|
/*@}*/
|