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Tom Rini10e47792018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
wdenke65527f2004-02-12 00:47:09 +00002/*
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.
wdenke65527f2004-02-12 00:47:09 +00008 */
9
Simon Glassd1d35512023-12-15 20:14:06 -070010#include <cpu_func.h>
Simon Glass537ecc92019-11-14 12:57:48 -070011#include <init.h>
wdenke65527f2004-02-12 00:47:09 +000012#include <watchdog.h>
13#include <command.h>
14#include <asm/processor.h>
Simon Glass6b9f0102020-05-10 11:40:06 -060015#include <asm/ptrace.h>
wdenke65527f2004-02-12 00:47:09 +000016
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,
Wolfgang Denkec7fbf52013-10-04 17:43:24 +020024 fp->format, (fp->vector & 0x3) | ((fp->vector & 0xc00) >> 8));
wdenke65527f2004-02-12 00:47:09 +000025 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
Ovidiu Panait2c823912020-11-28 10:43:18 +020043static void trap_init(ulong value) {
wdenke65527f2004-02-12 00:47:09 +000044 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}
Ovidiu Panait2c823912020-11-28 10:43:18 +020062
63int arch_initr_trap(void)
64{
Tom Rinibb4dd962022-11-16 13:10:37 -050065 trap_init(CFG_SYS_SDRAM_BASE);
Ovidiu Panait2c823912020-11-28 10:43:18 +020066
67 return 0;
68}
Simon Glassd1d35512023-12-15 20:14:06 -070069
70void reset_cpu(void)
71{
72 /* TODO: Refactor all the do_reset calls to be reset_cpu() instead */
73 do_reset(NULL, 0, 0, NULL);
74}