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://www.fayfayspace.org/license/LICENSE.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-02-24     Bernard      first version
 */

#include "AT91RM9200.h"

/*!
 * \addtogroup xgAT91RM9200
 */
/*@{*/

void rt_hw_show_register (struct rt_hw_register *regs)
{
	rt_kprintf ("pc : [<%08lx>]    lr : [<%08lx>]\n"
		"sp : %08lx  ip : %08lx  fp : %08lx\n",
		regs->pc, regs->lr, regs->sp, regs->ip, regs->fp);
	rt_kprintf ("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
		regs->r10, regs->r9, regs->r8);
	rt_kprintf ("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
		regs->r7, regs->r6, regs->r5, regs->r4);
	rt_kprintf ("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
		regs->r3, regs->r2, regs->r1, regs->r0);
}

/*!
 * \brief trap because undefined instruction
 *
 * 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_kprintf("undefined instruction\n");
    rt_hw_show_register(regs);
    rt_hw_cpu_shutdown();
}

/*!
 * \brief trap because software interrupt
 *
 * 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_kprintf("software interrupt\n");
    rt_hw_show_register(regs);
    rt_hw_cpu_shutdown();
}

/*!
 * \brief trap because abort occurs during an instruction prefetch.
 *
 * 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_kprintf("prefetch abort\n");
    rt_hw_show_register(regs);
    rt_hw_cpu_shutdown();
}

/*!
 * \brief trap because abort occurs during a data access.
 *
 * 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_kprintf("data abort\n");
    rt_hw_show_register(regs);
    rt_hw_cpu_shutdown();
}

/*!
 * \brief trap because reserved reason
 *
 * normally, 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_kprintf("not used\n");
    rt_hw_show_register(regs);
    rt_hw_cpu_shutdown();
}

void rt_hw_trap_irq(struct rt_hw_register *regs)
{
    rt_kprintf("interrupt request\n");
    rt_hw_show_register(regs);
    rt_hw_cpu_shutdown();
}

void rt_hw_trap_fiq(struct rt_hw_register *regs)
{
    rt_kprintf("fast interrupt request\n");
    rt_hw_show_register(regs);
    rt_hw_cpu_shutdown();
}

/*@}*/