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panic.c

/*
 * Copyright (C) 2003  Richard Curnow, SuperH UK Limited
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/kernel.h>
#include <asm/io.h>
#include <asm/registers.h>

/* THIS IS A PHYSICAL ADDRESS */
#define HDSP2534_ADDR (0x04002100)

#ifdef CONFIG_SH_CAYMAN

static void poor_mans_delay(void)
{
      int i;
      for (i = 0; i < 2500000; i++) {
      }           /* poor man's delay */
}

static void show_value(unsigned long x)
{
      int i;
      unsigned nibble;
      for (i = 0; i < 8; i++) {
            nibble = ((x >> (i * 4)) & 0xf);

            ctrl_outb(nibble + ((nibble > 9) ? 55 : 48),
                    HDSP2534_ADDR + 0xe0 + ((7 - i) << 2));
      }
}

#endif

void
panic_handler(unsigned long panicPC, unsigned long panicSSR,
            unsigned long panicEXPEVT)
{
#ifdef CONFIG_SH_CAYMAN
      while (1) {
            /* This piece of code displays the PC on the LED display */
            show_value(panicPC);
            poor_mans_delay();
            show_value(panicSSR);
            poor_mans_delay();
            show_value(panicEXPEVT);
            poor_mans_delay();
      }
#endif

      /* Never return from the panic handler */
      for (;;) ;

}

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