include/linux/reboot.h

   1 #ifndef _LINUX_REBOOT_H
   2 #define _LINUX_REBOOT_H
   3
   4 /*
   5  * Magic values required to use _reboot() system call.
   6  */
   7
   8 #define LINUX_REBOOT_MAGIC1     0xfee1dead
   9 #define LINUX_REBOOT_MAGIC2     672274793
  10 #define LINUX_REBOOT_MAGIC2A    85072278
  11 #define LINUX_REBOOT_MAGIC2B    369367448
  12 #define LINUX_REBOOT_MAGIC2C    537993216
  13
  14
  15 /*
  16  * Commands accepted by the _reboot() system call.
  17  *
  18  * RESTART     Restart system using default command and mode.
  19  * HALT        Stop OS and give system control to ROM monitor, if any.
  20  * CAD_ON      Ctrl-Alt-Del sequence causes RESTART command.
  21  * CAD_OFF     Ctrl-Alt-Del sequence sends SIGINT to init task.
  22  * POWER_OFF   Stop OS and remove all power from system, if possible.
  23  * RESTART2    Restart system using given command string.
  24  * SW_SUSPEND  Suspend system using software suspend if compiled in.
  25  * KEXEC       Restart system using a previously loaded Linux kernel
  26  */
  27
  28 #define LINUX_REBOOT_CMD_RESTART        0x01234567
  29 #define LINUX_REBOOT_CMD_HALT           0xCDEF0123
  30 #define LINUX_REBOOT_CMD_CAD_ON         0x89ABCDEF
  31 #define LINUX_REBOOT_CMD_CAD_OFF        0x00000000
  32 #define LINUX_REBOOT_CMD_POWER_OFF      0x4321FEDC
  33 #define LINUX_REBOOT_CMD_RESTART2       0xA1B2C3D4
  34 #define LINUX_REBOOT_CMD_SW_SUSPEND     0xD000FCE2
  35 #define LINUX_REBOOT_CMD_KEXEC          0x45584543
  36
  37
  38 #ifdef __KERNEL__
  39
  40 #include <linux/notifier.h>
  41
  42 extern int register_reboot_notifier(struct notifier_block *);
  43 extern int unregister_reboot_notifier(struct notifier_block *);
  44
  45
  46 /*
  47  * Architecture-specific implementations of sys_reboot commands.
  48  */
  49
  50 extern void machine_restart(char *cmd);
  51 extern void machine_halt(void);
  52 extern void machine_power_off(void);
  53
  54 extern void machine_shutdown(void);
  55 struct pt_regs;
  56 extern void machine_crash_shutdown(struct pt_regs *);
  57
  58 /*
  59  * Architecture independent implemenations of sys_reboot commands.
  60  */
  61
  62 extern void kernel_shutdown_prepare(enum system_states state);
  63
  64 extern void kernel_restart(char *cmd);
  65 extern void kernel_halt(void);
  66 extern void kernel_power_off(void);
  67
  68 void ctrl_alt_del(void);
  69
  70 /*
  71  * Emergency restart, callable from an interrupt handler.
  72  */
  73
  74 extern void emergency_restart(void);
  75 #include <asm/emergency-restart.h>
  76
  77 #endif
  78
  79 #endif /* _LINUX_REBOOT_H */