release/src-rt-6.x.4708/linux/linux-2.6.36/arch/sparc/kernel/reboot.c

   1 /* reboot.c: reboot/shutdown/halt/poweroff handling
   2  *
   3  * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
   4  */
   5 #include <linux/kernel.h>
   6 #include <linux/reboot.h>
   7 #include <linux/module.h>
   8 #include <linux/pm.h>
   9
  10 #include <asm/system.h>
  11 #include <asm/oplib.h>
  12 #include <asm/prom.h>
  13
  14 /* sysctl - toggle power-off restriction for serial console
  15  * systems in machine_power_off()
  16  */
  17 int scons_pwroff = 1;
  18
  19 /* This isn't actually used, it exists merely to satisfy the
  20  * reference in kernel/sys.c
  21  */
  22 void (*pm_power_off)(void) = machine_power_off;
  23 EXPORT_SYMBOL(pm_power_off);
  24
  25 void machine_power_off(void)
  26 {
  27         if (strcmp(of_console_device->type, "serial") || scons_pwroff)
  28                 prom_halt_power_off();
  29
  30         prom_halt();
  31 }
  32
  33 void machine_halt(void)
  34 {
  35         prom_halt();
  36         panic("Halt failed!");
  37 }
  38
  39 void machine_restart(char *cmd)
  40 {
  41         char *p;
  42
  43         p = strchr(reboot_command, '\n');
  44         if (p)
  45                 *p = 0;
  46         if (cmd)
  47                 prom_reboot(cmd);
  48         if (*reboot_command)
  49                 prom_reboot(reboot_command);
  50         prom_reboot("");
  51         panic("Reboot failed!");
  52 }