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/processor.h>
  16
  17 #include <cobalt.h>
  18
  19 #define RESET_PORT      ((void __iomem *)CKSEG1ADDR(0x1c000000))
  20 #define RESET           0x0f
  21
  22 DEFINE_LED_TRIGGER(power_off_led_trigger);
  23
  24 static int __init ledtrig_power_off_init(void)
  25 {
  26         led_trigger_register_simple("power-off", &power_off_led_trigger);
  27         return 0;
  28 }
  29 device_initcall(ledtrig_power_off_init);
  30
  31 void cobalt_machine_halt(void)
  32 {
  33         /*
  34          * turn on power off LED on RaQ
  35          */
  36         led_trigger_event(power_off_led_trigger, LED_FULL);
  37
  38         local_irq_disable();
  39         while (1) {
  40                 if (cpu_wait)
  41                         cpu_wait();
  42         }
  43 }
  44
  45 void cobalt_machine_restart(char *command)
  46 {
  47         writeb(RESET, RESET_PORT);
  48
  49         /* we should never get here */
  50         cobalt_machine_halt();
  51 }