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86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
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* (C) Copyright 2011, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
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* (C) Copyright 2011, Julius Baxter <julius@opencores.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <stdio_dev.h>
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#include <asm/system.h>
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static const char * const excp_table[] = {
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"Unknown exception",
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"Reset",
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"Bus Error",
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"Data Page Fault",
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"Instruction Page Fault",
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"Tick Timer",
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"Alignment",
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"Illegal Instruction",
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"External Interrupt",
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"D-TLB Miss",
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"I-TLB Miss",
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"Range",
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"System Call",
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"Floating Point",
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"Trap",
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};
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static void (*handlers[32])(void);
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void exception_install_handler(int exception, void (*handler)(void))
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{
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if (exception < 0 || exception > 31)
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return;
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handlers[exception] = handler;
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}
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void exception_free_handler(int exception)
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{
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if (exception < 0 || exception > 31)
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return;
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handlers[exception] = 0;
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}
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static void exception_hang(int vect)
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{
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printf("Unhandled exception at 0x%x ", vect & 0xff00);
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vect = ((vect >> 8) & 0xff);
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if (vect < ARRAY_SIZE(excp_table))
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printf("(%s)\n", excp_table[vect]);
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else
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printf("(%s)\n", excp_table[0]);
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printf("EPCR: 0x%08lx\n", mfspr(SPR_EPCR_BASE));
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printf("EEAR: 0x%08lx\n", mfspr(SPR_EEAR_BASE));
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printf("ESR: 0x%08lx\n", mfspr(SPR_ESR_BASE));
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hang();
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}
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void exception_handler(int vect)
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{
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int exception = vect >> 8;
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if (handlers[exception])
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handlers[exception]();
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else
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exception_hang(vect);
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}
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