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 <asm/io.h>
11#include <asm/registers.h>
12
13/* THIS IS A PHYSICAL ADDRESS */
14#define HDSP2534_ADDR (0x04002100)
15
16#ifdef CONFIG_SH_CAYMAN
17
18static void poor_mans_delay(void)
19{
20	int i;
21	for (i = 0; i < 2500000; i++) {
22	}		/* poor man's delay */
23}
24
25static void show_value(unsigned long x)
26{
27	int i;
28	unsigned nibble;
29	for (i = 0; i < 8; i++) {
30		nibble = ((x >> (i * 4)) & 0xf);
31
32		ctrl_outb(nibble + ((nibble > 9) ? 55 : 48),
33			  HDSP2534_ADDR + 0xe0 + ((7 - i) << 2));
34	}
35}
36
37#endif
38
39void
40panic_handler(unsigned long panicPC, unsigned long panicSSR,
41	      unsigned long panicEXPEVT)
42{
43#ifdef CONFIG_SH_CAYMAN
44	while (1) {
45		/* This piece of code displays the PC on the LED display */
46		show_value(panicPC);
47		poor_mans_delay();
48		show_value(panicSSR);
49		poor_mans_delay();
50		show_value(panicEXPEVT);
51		poor_mans_delay();
52	}
53#endif
54
55	/* Never return from the panic handler */
56	for (;;) ;
57
58}
59