#ifndef _LINUX_REBOOT_H
  #define _LINUX_REBOOT_H
  
  /*
   * Magic values required to use _reboot() system call.
   */
  
  #define	LINUX_REBOOT_MAGIC1	0xfee1dead
  #define	LINUX_REBOOT_MAGIC2	672274793
  #define	LINUX_REBOOT_MAGIC2A	85072278
  #define	LINUX_REBOOT_MAGIC2B	369367448
  #define	LINUX_REBOOT_MAGIC2C	537993216
  
  
  /*
   * Commands accepted by the _reboot() system call.
   *
   * RESTART     Restart system using default command and mode.
   * HALT        Stop OS and give system control to ROM monitor, if any.
   * CAD_ON      Ctrl-Alt-Del sequence causes RESTART command.
   * CAD_OFF     Ctrl-Alt-Del sequence sends SIGINT to init task.
   * POWER_OFF   Stop OS and remove all power from system, if possible.
   * RESTART2    Restart system using given command string.
   * SW_SUSPEND  Suspend system using software suspend if compiled in.
   * KEXEC       Restart system using a previously loaded Linux kernel
   */
  
  #define	LINUX_REBOOT_CMD_RESTART	0x01234567
  #define	LINUX_REBOOT_CMD_HALT		0xCDEF0123
  #define	LINUX_REBOOT_CMD_CAD_ON		0x89ABCDEF
  #define	LINUX_REBOOT_CMD_CAD_OFF	0x00000000
  #define	LINUX_REBOOT_CMD_POWER_OFF	0x4321FEDC
  #define	LINUX_REBOOT_CMD_RESTART2	0xA1B2C3D4
  #define	LINUX_REBOOT_CMD_SW_SUSPEND	0xD000FCE2
  #define	LINUX_REBOOT_CMD_KEXEC		0x45584543
  
  
  #ifdef __KERNEL__
  
  #include <linux/notifier.h>

  #define SYS_DOWN	0x0001	/* Notify of system down */
  #define SYS_RESTART	SYS_DOWN
  #define SYS_HALT	0x0002	/* Notify of system halt */
  #define SYS_POWER_OFF	0x0003	/* Notify of system power off */

  extern int register_reboot_notifier(struct notifier_block *);
  extern int unregister_reboot_notifier(struct notifier_block *);
  
  
  /*
   * Architecture-specific implementations of sys_reboot commands.
   */
  
  extern void machine_restart(char *cmd);
  extern void machine_halt(void);
  extern void machine_power_off(void);

  extern void machine_shutdown(void);

  struct pt_regs;
  extern void machine_crash_shutdown(struct pt_regs *);

  /* 
   * Architecture independent implemenations of sys_reboot commands.
   */

  extern void kernel_restart_prepare(char *cmd);

  extern void kernel_restart(char *cmd);
  extern void kernel_halt(void);
  extern void kernel_power_off(void);

  extern int C_A_D; /* for sysctl */

  void ctrl_alt_del(void);

  #define POWEROFF_CMD_PATH_LEN	256
  extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN];
  
  extern int orderly_poweroff(bool force);

  /*
   * Emergency restart, callable from an interrupt handler.
   */
  
  extern void emergency_restart(void);
  #include <asm/emergency-restart.h>

  #endif
  
  #endif /* _LINUX_REBOOT_H */