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} 50