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
 *                Triseel
 */

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

#include "AT9200.h"

/**
 * @addtogroup AT91RM9200
 */
/*@{*/

extern struct rt_thread *rt_current_thread;

/**
 * this function will show registers of CPU
 *
 * @param regs the registers point
 */
void rt_hw_show_register (struct rt_hw_register *regs)
{
	rt_kprintf("Execption:\n");
	rt_kprintf("r00:0x%08x r01:0x%08x r02:0x%08x r03:0x%08x\n", regs->r0, regs->r1, regs->r2, regs->r3);
	rt_kprintf("r04:0x%08x r05:0x%08x r06:0x%08x r07:0x%08x\n", regs->r4, regs->r5, regs->r6, regs->r7);
	rt_kprintf("r08:0x%08x r09:0x%08x r10:0x%08x\n", regs->r8, regs->r9, regs->r10);
	rt_kprintf("fp :0x%08x ip :0x%08x\n", regs->fp, regs->ip);
	rt_kprintf("sp :0x%08x lr :0x%08x pc :0x%08x\n", regs->sp, regs->lr, regs->pc);
	rt_kprintf("cpsr:0x%08x\n", regs->cpsr);
}

/**
 * When ARM7TDMI comes across an instruction which it cannot handle,
 * it takes the undefined instruction trap.
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_udef(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    rt_kprintf("undefined instruction\n");
	rt_kprintf("thread - %s stack:\n", rt_current_thread->name);
	rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);

    rt_hw_cpu_shutdown();
}

/**
 * The software interrupt instruction (SWI) is used for entering
 * Supervisor mode, usually to request a particular supervisor
 * function.
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_swi(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    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.
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_pabt(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    rt_kprintf("prefetch abort\n");
	rt_kprintf("thread - %s stack:\n", rt_current_thread->name);
	rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);

    rt_hw_cpu_shutdown();
}

/**
 * An abort indicates that the current memory access cannot be completed,
 * which occurs during a data access.
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_dabt(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    rt_kprintf("data abort\n");
	rt_kprintf("thread - %s stack:\n", rt_current_thread->name);
	rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);

    rt_hw_cpu_shutdown();
}

/**
 * Normally, system will never reach here
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_resv(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    rt_kprintf("not used\n");

    rt_hw_cpu_shutdown();
}

/*************************************************
** Implemented : Triseel, Date : 06-03-03
** Func Name   : rt_hw_trap_irq
** Comments    : this func should be migrated based on diff CPU / Arch, but i think it will be better to fullfil in startup.s
** Notes       :
** Input  Args :
**               none :
** Output Args :
**               none :
** Rtn    Val  :
**               none :
*************************************************/
void rt_hw_trap_irq()
{
	register rt_uint32_t RegVal;
	register rt_isr_handler_t isr_func = RT_NULL;

	/* read interrupt vector and id */
	isr_func= REG_IN32(AT9200_AIC_IVR, 0);
	RegVal	= REG_IN32(AT9200_AIC_ISR, 0);

	/* execute isr */
	if (isr_func != RT_NULL)
	{
		isr_func(RegVal);
	}

	/* indicate interrupt handle end */
	REG_OUT32(AT9200_AIC_EOICR, 0, 0);
}

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

/*@}*/