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 42extern int register_reboot_notifier(struct notifier_block *); 43extern int unregister_reboot_notifier(struct notifier_block *); 44 45 46/* 47 * Architecture-specific implementations of sys_reboot commands. 48 */ 49 50extern void machine_restart(char *cmd); 51extern void machine_halt(void); 52extern void machine_power_off(void); 53 54extern void machine_shutdown(void); 55struct pt_regs; 56extern void machine_crash_shutdown(struct pt_regs *); 57 58/* 59 * Architecture independent implemenations of sys_reboot commands. 60 */ 61 62extern void kernel_restart_prepare(char *cmd); 63extern void kernel_restart(char *cmd); 64extern void kernel_halt(void); 65extern void kernel_power_off(void); 66 67extern int C_A_D; /* for sysctl */ 68void ctrl_alt_del(void); 69 70#define POWEROFF_CMD_PATH_LEN 256 71extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN]; 72 73extern int orderly_poweroff(bool force); 74 75/* 76 * Emergency restart, callable from an interrupt handler. 77 */ 78 79extern void emergency_restart(void); 80#include <asm/emergency-restart.h> 81 82#endif 83 84#endif /* _LINUX_REBOOT_H */ 85