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/*
* (C) Copyright 2011, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
* (C) Copyright 2011, Julius Baxter <julius@opencores.org>
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <stdio_dev.h>
#include <asm/system.h>
static const char * const excp_table[] = {
"Unknown exception",
"Reset",
"Bus Error",
"Data Page Fault",
"Instruction Page Fault",
"Tick Timer",
"Alignment",
"Illegal Instruction",
"External Interrupt",
"D-TLB Miss",
"I-TLB Miss",
"Range",
"System Call",
"Floating Point",
"Trap",
};
static void (*handlers[32])(void);
void exception_install_handler(int exception, void (*handler)(void))
{
if (exception < 0 || exception > 31)
return;
handlers[exception] = handler;
}
void exception_free_handler(int exception)
{
if (exception < 0 || exception > 31)
return;
handlers[exception] = 0;
}
static void exception_hang(int vect)
{
printf("Unhandled exception at 0x%x ", vect & 0xff00);
vect = ((vect >> 8) & 0xff);
if (vect < ARRAY_SIZE(excp_table))
printf("(%s)\n", excp_table[vect]);
else
printf("(%s)\n", excp_table[0]);
printf("EPCR: 0x%08lx\n", mfspr(SPR_EPCR_BASE));
printf("EEAR: 0x%08lx\n", mfspr(SPR_EEAR_BASE));
printf("ESR: 0x%08lx\n", mfspr(SPR_ESR_BASE));
hang();
}
void exception_handler(int vect)
{
int exception = vect >> 8;
if (handlers[exception])
handlers[exception]();
else
exception_hang(vect);
}
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