LXR linux/arch/mips/cobalt/reset.c

   1/*
   2 * Cobalt Reset operations
   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 * Copyright (C) 1995, 1996, 1997 by Ralf Baechle
   9 * Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
  10 */
  11#include <linux/init.h>
  12#include <linux/io.h>
  13#include <linux/leds.h>
  14
  15#include <asm/idle.h>
  16#include <asm/processor.h>
  17
  18#include <cobalt.h>
  19
  20#define RESET_PORT      ((void __iomem *)CKSEG1ADDR(0x1c000000))
  21#define RESET           0x0f
  22
  23DEFINE_LED_TRIGGER(power_off_led_trigger);
  24
  25static int __init ledtrig_power_off_init(void)
  26{
  27        led_trigger_register_simple("power-off", &power_off_led_trigger);
  28        return 0;
  29}
  30device_initcall(ledtrig_power_off_init);
  31
  32void cobalt_machine_halt(void)
  33{
  34        /*
  35         * turn on power off LED on RaQ
  36         */
  37        led_trigger_event(power_off_led_trigger, LED_FULL);
  38
  39        local_irq_disable();
  40        while (1) {
  41                if (cpu_wait)
  42                        cpu_wait();
  43        }
  44}
  45
  46void cobalt_machine_restart(char *command)
  47{
  48        writeb(RESET, RESET_PORT);
  49
  50        /* we should never get here */
  51        cobalt_machine_halt();
  52}
  53