arch/mips/vr4181/osprey/reset.c

   1 /*
   2  * This program is free software; you can redistribute  it and/or modify it
   3  * under  the terms of  the GNU General  Public License as published by the
   4  * Free Software Foundation;  either version 2 of the  License, or (at your
   5  * option) any later version.
   6  *
   7  * Copyright (C) 1997, 2001 Ralf Baechle
   8  * Copyright 2001 MontaVista Software Inc.
   9  * Author: jsun@mvista.com or jsun@junsun.net
  10  */
  11 #include <linux/sched.h>
  12 #include <linux/mm.h>
  13 #include <asm/io.h>
  14 #include <asm/cacheflush.h>
  15 #include <asm/processor.h>
  16 #include <asm/reboot.h>
  17 #include <asm/system.h>
  18
  19 void nec_osprey_restart(char *command)
  20 {
  21         set_c0_status(ST0_ERL);
  22         change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
  23         flush_cache_all();
  24         write_c0_wired(0);
  25         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
  26 }
  27
  28 void nec_osprey_halt(void)
  29 {
  30         printk(KERN_NOTICE "\n** You can safely turn off the power\n");
  31         while (1)
  32                 __asm__(".set\tmips3\n\t"
  33                         "wait\n\t"
  34                         ".set\tmips0");
  35 }
  36
  37 void nec_osprey_power_off(void)
  38 {
  39         nec_osprey_halt();
  40 }