arch/mips/lemote/lm2e/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) 2007 Lemote, Inc. & Institute of Computing Technology
   8  * Author: Fuxin Zhang, zhangfx@lemote.com
   9  */
  10 #include <linux/pm.h>
  11
  12 #include <asm/reboot.h>
  13
  14 static void loongson2e_restart(char *command)
  15 {
  16 #ifdef CONFIG_32BIT
  17         *(unsigned long *)0xbfe00104 &= ~(1 << 2);
  18         *(unsigned long *)0xbfe00104 |= (1 << 2);
  19 #else
  20         *(unsigned long *)0xffffffffbfe00104 &= ~(1 << 2);
  21         *(unsigned long *)0xffffffffbfe00104 |= (1 << 2);
  22 #endif
  23         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
  24 }
  25
  26 static void loongson2e_halt(void)
  27 {
  28         while (1) ;
  29 }
  30
  31 static void loongson2e_power_off(void)
  32 {
  33         loongson2e_halt();
  34 }
  35
  36 void mips_reboot_setup(void)
  37 {
  38         _machine_restart = loongson2e_restart;
  39         _machine_halt = loongson2e_halt;
  40         pm_power_off = loongson2e_power_off;
  41 }