LXR linux/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#include <linux/of.h>
  11
  12#include <asm/oplib.h>
  13#include <asm/prom.h>
  14#include <asm/setup.h>
  15
  16/* sysctl - toggle power-off restriction for serial console
  17 * systems in machine_power_off()
  18 */
  19int scons_pwroff = 1;
  20
  21/* This isn't actually used, it exists merely to satisfy the
  22 * reference in kernel/sys.c
  23 */
  24void (*pm_power_off)(void) = machine_power_off;
  25EXPORT_SYMBOL(pm_power_off);
  26
  27void machine_power_off(void)
  28{
  29        if (!of_node_is_type(of_console_device, "serial") || scons_pwroff)
  30                prom_halt_power_off();
  31
  32        prom_halt();
  33}
  34
  35void machine_halt(void)
  36{
  37        prom_halt();
  38        panic("Halt failed!");
  39}
  40
  41void machine_restart(char *cmd)
  42{
  43        char *p;
  44
  45        p = strchr(reboot_command, '\n');
  46        if (p)
  47                *p = 0;
  48        if (cmd)
  49                prom_reboot(cmd);
  50        if (*reboot_command)
  51                prom_reboot(reboot_command);
  52        prom_reboot("");
  53        panic("Reboot failed!");
  54}
  55
  56