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
  23 DEFINE_LED_TRIGGER(power_off_led_trigger);
  24
  25 static int __init ledtrig_power_off_init(void)
  26 {
  27         led_trigger_register_simple("power-off", &power_off_led_trigger);
  28         return 0;
  29 }
  30 device_initcall(ledtrig_power_off_init);
  31
  32 void 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
  46 void cobalt_machine_restart(char *command)
  47 {
  48         writeb(RESET, RESET_PORT);
  49
  50         /* we should never get here */
  51         cobalt_machine_halt();
  52 }