arch/mips/loongson1/common/reset.c

   1 /*
   2  * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
   3  *
   4  * This program is free software; you can redistribute  it and/or modify it
   5  * under  the terms of  the GNU General  Public License as published by the
   6  * Free Software Foundation;  either version 2 of the  License, or (at your
   7  * option) any later version.
   8  */
   9
  10 #include <linux/io.h>
  11 #include <linux/pm.h>
  12 #include <asm/reboot.h>
  13
  14 #include <loongson1.h>
  15
  16 static void ls1x_restart(char *command)
  17 {
  18         __raw_writel(0x1, LS1X_WDT_EN);
  19         __raw_writel(0x5000000, LS1X_WDT_TIMER);
  20         __raw_writel(0x1, LS1X_WDT_SET);
  21 }
  22
  23 static void ls1x_halt(void)
  24 {
  25         while (1) {
  26                 if (cpu_wait)
  27                         cpu_wait();
  28         }
  29 }
  30
  31 static void ls1x_power_off(void)
  32 {
  33         ls1x_halt();
  34 }
  35
  36 static int __init ls1x_reboot_setup(void)
  37 {
  38         _machine_restart = ls1x_restart;
  39         _machine_halt = ls1x_halt;
  40         pm_power_off = ls1x_power_off;
  41
  42         return 0;
  43 }
  44
  45 arch_initcall(ls1x_reboot_setup);