arch/sparc/kernel/reboot.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* reboot.c: reboot/shutdown/halt/poweroff handling
   3  *
   4  * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
   5  */
   6 #include <linux/kernel.h>
   7 #include <linux/reboot.h>
   8 #include <linux/export.h>
   9 #include <linux/pm.h>
  10
  11 #include <asm/oplib.h>
  12 #include <asm/prom.h>
  13 #include <asm/setup.h>
  14
  15 /* sysctl - toggle power-off restriction for serial console
  16  * systems in machine_power_off()
  17  */
  18 int scons_pwroff = 1;
  19
  20 /* This isn't actually used, it exists merely to satisfy the
  21  * reference in kernel/sys.c
  22  */
  23 void (*pm_power_off)(void) = machine_power_off;
  24 EXPORT_SYMBOL(pm_power_off);
  25
  26 void machine_power_off(void)
  27 {
  28         if (strcmp(of_console_device->type, "serial") || scons_pwroff)
  29                 prom_halt_power_off();
  30
  31         prom_halt();
  32 }
  33
  34 void machine_halt(void)
  35 {
  36         prom_halt();
  37         panic("Halt failed!");
  38 }
  39
  40 void machine_restart(char *cmd)
  41 {
  42         char *p;
  43
  44         p = strchr(reboot_command, '\n');
  45         if (p)
  46                 *p = 0;
  47         if (cmd)
  48                 prom_reboot(cmd);
  49         if (*reboot_command)
  50                 prom_reboot(reboot_command);
  51         prom_reboot("");
  52         panic("Reboot failed!");
  53 }
  54