LXR uboot/arch/m68k/lib/traps.c

   1/*
   2 * (C) Copyright 2003
   3 * Josef Baumgartner <josef.baumgartner@telex.de>
   4 *
   5 * (C) Copyright 2000
   6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7 *
   8 * See file CREDITS for list of people who contributed to this
   9 * project.
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License as
  13 * published by the Free Software Foundation; either version 2 of
  14 * the License, or (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24 * MA 02111-1307 USA
  25 */
  26
  27#include <common.h>
  28#include <watchdog.h>
  29#include <command.h>
  30#include <asm/processor.h>
  31
  32
  33extern void _exc_handler(void);
  34extern void _int_handler(void);
  35
  36static void show_frame(struct pt_regs *fp)
  37{
  38        printf ("Vector Number: %d  Format: %02x  Fault Status: %01x\n\n", (fp->vector & 0x3fc) >> 2,
  39                fp->format, (fp->vector & 0x3) | ((fp->vector & 0xc00) >> 8));
  40        printf ("PC: %08lx    SR: %08lx    SP: %08lx\n", fp->pc, (long) fp->sr, (long) fp);
  41        printf ("D0: %08lx    D1: %08lx    D2: %08lx    D3: %08lx\n",
  42                fp->d0, fp->d1, fp->d2, fp->d3);
  43        printf ("D4: %08lx    D5: %08lx    D6: %08lx    D7: %08lx\n",
  44                fp->d4, fp->d5, fp->d6, fp->d7);
  45        printf ("A0: %08lx    A1: %08lx    A2: %08lx    A3: %08lx\n",
  46                fp->a0, fp->a1, fp->a2, fp->a3);
  47        printf ("A4: %08lx    A5: %08lx    A6: %08lx\n",
  48                fp->a4, fp->a5, fp->a6);
  49}
  50
  51void exc_handler(struct pt_regs *fp) {
  52        printf("\n\n*** Unexpected exception ***\n");
  53        show_frame (fp);
  54        printf("\n*** Please Reset Board! ***\n");
  55        for(;;);
  56}
  57
  58void trap_init(ulong value) {
  59        unsigned long *vec = (ulong *)value;
  60        int i;
  61
  62        for(i = 2; i < 25; i++) {
  63                vec[i] = (unsigned long)_exc_handler;
  64        }
  65        for(i = 25; i < 32; i++) {
  66                vec[i] = (unsigned long)_int_handler;
  67        }
  68        for(i = 32; i < 64; i++) {
  69                vec[i] = (unsigned long)_exc_handler;
  70        }
  71        for(i = 64; i < 256; i++) {
  72                vec[i] = (unsigned long)_int_handler;
  73        }
  74
  75        setvbr(value);          /* set vector base register to new table */
  76}
  77