rt-thread/libcpu/mips/xburst/exception.c

/*
 * File      : exception.c
 * COPYRIGHT (C) 2008 - 2016, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2010-05-17     swkyer       first version
 */
#include <rtthread.h>
#include <rthw.h>
#include "../common/exception.h"
#include "../common/mipsregs.h"

/**
 * @addtogroup Ingenic
 */
/*@{*/

/**
 * exception handle table
 */
exception_func_t sys_exception_handlers[33];

/**
 * setup the exception handle
 */
exception_func_t rt_set_except_vector(int n, exception_func_t func)
{
    exception_func_t old_handler = sys_exception_handlers[n];

    if ((n == 0) || (n > 32) || (!func))
    {
        return 0;
    }

    sys_exception_handlers[n] = func;

    return old_handler;
}

void tlb_refill_handler(void)
{
    rt_kprintf("tlb-miss happens, epc: 0x%08x\n", read_c0_epc());
    rt_hw_cpu_shutdown();
}

void cache_error_handler(void)
{
    rt_kprintf("cache exception happens, epc: 0x%08x\n", read_c0_epc());
    rt_hw_cpu_shutdown();
}

static void unhandled_exception_handle(pt_regs_t *regs)
{
    rt_kprintf("exception happens, epc: 0x%08x\n", regs->cp0_epc);
}

void install_default_execpt_handle(void)
{
    rt_int32_t i;

    for (i=0; i<33; i++)
        sys_exception_handlers[i] = (exception_func_t)unhandled_exception_handle;
}

/*@}*/