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

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2003
   4 * Josef Baumgartner <josef.baumgartner@telex.de>
   5 *
   6 * (C) Copyright 2000
   7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8 */
   9
  10#include <common.h>
  11#include <init.h>
  12#include <watchdog.h>
  13#include <command.h>
  14#include <asm/processor.h>
  15#include <asm/ptrace.h>
  16
  17
  18extern void _exc_handler(void);
  19extern void _int_handler(void);
  20
  21static void show_frame(struct pt_regs *fp)
  22{
  23        printf ("Vector Number: %d  Format: %02x  Fault Status: %01x\n\n", (fp->vector & 0x3fc) >> 2,
  24                fp->format, (fp->vector & 0x3) | ((fp->vector & 0xc00) >> 8));
  25        printf ("PC: %08lx    SR: %08lx    SP: %08lx\n", fp->pc, (long) fp->sr, (long) fp);
  26        printf ("D0: %08lx    D1: %08lx    D2: %08lx    D3: %08lx\n",
  27                fp->d0, fp->d1, fp->d2, fp->d3);
  28        printf ("D4: %08lx    D5: %08lx    D6: %08lx    D7: %08lx\n",
  29                fp->d4, fp->d5, fp->d6, fp->d7);
  30        printf ("A0: %08lx    A1: %08lx    A2: %08lx    A3: %08lx\n",
  31                fp->a0, fp->a1, fp->a2, fp->a3);
  32        printf ("A4: %08lx    A5: %08lx    A6: %08lx\n",
  33                fp->a4, fp->a5, fp->a6);
  34}
  35
  36void exc_handler(struct pt_regs *fp) {
  37        printf("\n\n*** Unexpected exception ***\n");
  38        show_frame (fp);
  39        printf("\n*** Please Reset Board! ***\n");
  40        for(;;);
  41}
  42
  43static void trap_init(ulong value) {
  44        unsigned long *vec = (ulong *)value;
  45        int i;
  46
  47        for(i = 2; i < 25; i++) {
  48                vec[i] = (unsigned long)_exc_handler;
  49        }
  50        for(i = 25; i < 32; i++) {
  51                vec[i] = (unsigned long)_int_handler;
  52        }
  53        for(i = 32; i < 64; i++) {
  54                vec[i] = (unsigned long)_exc_handler;
  55        }
  56        for(i = 64; i < 256; i++) {
  57                vec[i] = (unsigned long)_int_handler;
  58        }
  59
  60        setvbr(value);          /* set vector base register to new table */
  61}
  62
  63int arch_initr_trap(void)
  64{
  65        trap_init(CONFIG_SYS_SDRAM_BASE);
  66
  67        return 0;
  68}
  69