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
18 extern void _exc_handler(void);
19 extern void _int_handler(void);
20
show_frame(struct pt_regs * fp)21 static 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
exc_handler(struct pt_regs * fp)36 void 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
trap_init(ulong value)43 static 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
arch_initr_trap(void)63 int arch_initr_trap(void)
64 {
65 trap_init(CONFIG_SYS_SDRAM_BASE);
66
67 return 0;
68 }
69