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-rw-r--r--arch/sh/boards/mach-cayman/panic.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-cayman/panic.c b/arch/sh/boards/mach-cayman/panic.c
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+++ b/arch/sh/boards/mach-cayman/panic.c
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1/*
2 * Copyright (C) 2003 Richard Curnow, SuperH UK Limited
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 */
8
9#include <linux/kernel.h>
10#include <linux/io.h>
11#include <cpu/registers.h>
12
13/* THIS IS A PHYSICAL ADDRESS */
14#define HDSP2534_ADDR (0x04002100)
15
16static void poor_mans_delay(void)
17{
18 int i;
19
20 for (i = 0; i < 2500000; i++)
21 cpu_relax();
22}
23
24static void show_value(unsigned long x)
25{
26 int i;
27 unsigned nibble;
28 for (i = 0; i < 8; i++) {
29 nibble = ((x >> (i * 4)) & 0xf);
30
31 __raw_writeb(nibble + ((nibble > 9) ? 55 : 48),
32 HDSP2534_ADDR + 0xe0 + ((7 - i) << 2));
33 }
34}
35
36void
37panic_handler(unsigned long panicPC, unsigned long panicSSR,
38 unsigned long panicEXPEVT)
39{
40 while (1) {
41 /* This piece of code displays the PC on the LED display */
42 show_value(panicPC);
43 poor_mans_delay();
44 show_value(panicSSR);
45 poor_mans_delay();
46 show_value(panicEXPEVT);
47 poor_mans_delay();
48 }
49}