trap.c

RT-Thread是发展中的下一代微内核嵌入式实时操作系统

/*
 * 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
 * 2006-10-24     Bernard      first version
 */

#include <rtthread.h>
#include <rthw.h>

#include "pxa270.h"

/**
 * @addtogroup PXA270
 */
/*@{*/

/**
 * When ARM7TDMI comes across an instruction which it cannot handle, 
 * it takes the undefined instruction trap.
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_udef()
{
    rt_kprintf("undefined instruction\n");
    rt_hw_cpu_shutdown();
}

/**
 * The software interrupt instruction (SWI) is used for entering 
 * Supervisor mode, usually to request a particular supervisor 
 * function.
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_swi()
{
    rt_kprintf("software interrupt\n");
    rt_hw_cpu_shutdown();
}

/**
 * An abort indicates that the current memory access cannot be completed,
 * which occurs during an instruction prefetch.
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_pabt()
{
    rt_kprintf("prefetch abort\n");
    rt_hw_cpu_shutdown();
}

/**
 * An abort indicates that the current memory access cannot be completed,
 * which occurs during a data access.
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_dabt()
{
    rt_kprintf("Data Abort ");
    rt_hw_cpu_shutdown();
}

/**
 * normally, never reach here
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_resv()
{
    rt_kprintf("not used\n");
    rt_hw_cpu_shutdown();
}

#define MAX_HANDLERS	32
extern rt_isr_handler_t isr_table[];
void rt_hw_trap_irq()
{
	unsigned int i, status;
	rt_isr_handler_t isr_func;

	status = PXA2X0_INTCTL_ICIP;
	for (i = 7; i < MAX_HANDLERS; i ++) /* 0..6 are reserved */
	{
		if (status & (1 << i)) 
		{
			isr_func = isr_table[i];
			isr_func(i);
		}
	}
}

void rt_hw_trap_fiq()
{
    rt_kprintf("fast interrupt request\n");
}

/*@}*/