include/linux/reboot.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_REBOOT_H
   3 #define _LINUX_REBOOT_H
   4
   5
   6 #include <linux/notifier.h>
   7 #include <uapi/linux/reboot.h>
   8
   9 #define SYS_DOWN        0x0001  /* Notify of system down */
  10 #define SYS_RESTART     SYS_DOWN
  11 #define SYS_HALT        0x0002  /* Notify of system halt */
  12 #define SYS_POWER_OFF   0x0003  /* Notify of system power off */
  13
  14 enum reboot_mode {
  15         REBOOT_COLD = 0,
  16         REBOOT_WARM,
  17         REBOOT_HARD,
  18         REBOOT_SOFT,
  19         REBOOT_GPIO,
  20 };
  21 extern enum reboot_mode reboot_mode;
  22
  23 enum reboot_type {
  24         BOOT_TRIPLE     = 't',
  25         BOOT_KBD        = 'k',
  26         BOOT_BIOS       = 'b',
  27         BOOT_ACPI       = 'a',
  28         BOOT_EFI        = 'e',
  29         BOOT_CF9_FORCE  = 'p',
  30         BOOT_CF9_SAFE   = 'q',
  31 };
  32 extern enum reboot_type reboot_type;
  33
  34 extern int reboot_default;
  35 extern int reboot_cpu;
  36 extern int reboot_force;
  37
  38
  39 extern int register_reboot_notifier(struct notifier_block *);
  40 extern int unregister_reboot_notifier(struct notifier_block *);
  41
  42 extern int register_restart_handler(struct notifier_block *);
  43 extern int unregister_restart_handler(struct notifier_block *);
  44 extern void do_kernel_restart(char *cmd);
  45
  46 /*
  47  * Architecture-specific implementations of sys_reboot commands.
  48  */
  49
  50 extern void migrate_to_reboot_cpu(void);
  51 extern void machine_restart(char *cmd);
  52 extern void machine_halt(void);
  53 extern void machine_power_off(void);
  54
  55 extern void machine_shutdown(void);
  56 struct pt_regs;
  57 extern void machine_crash_shutdown(struct pt_regs *);
  58
  59 /*
  60  * Architecture independent implemenations of sys_reboot commands.
  61  */
  62
  63 extern void kernel_restart_prepare(char *cmd);
  64 extern void kernel_restart(char *cmd);
  65 extern void kernel_halt(void);
  66 extern void kernel_power_off(void);
  67
  68 extern int C_A_D; /* for sysctl */
  69 void ctrl_alt_del(void);
  70
  71 #define POWEROFF_CMD_PATH_LEN   256
  72 extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN];
  73
  74 extern void orderly_poweroff(bool force);
  75 extern void orderly_reboot(void);
  76
  77 /*
  78  * Emergency restart, callable from an interrupt handler.
  79  */
  80
  81 extern void emergency_restart(void);
  82 #include <asm/emergency-restart.h>
  83
  84 #endif /* _LINUX_REBOOT_H */