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 #define SYS_DOWN 0x0001 /* Notify of system down */ 43 #define SYS_RESTART SYS_DOWN 44 #define SYS_HALT 0x0002 /* Notify of system halt */ 45 #define SYS_POWER_OFF 0x0003 /* Notify of system power off */ 46 47 extern int register_reboot_notifier(struct notifier_block *); 48 extern int unregister_reboot_notifier(struct notifier_block *); 49 50 51 /* 52 * Architecture-specific implementations of sys_reboot commands. 53 */ 54 55 extern void machine_restart(char *cmd); 56 extern void machine_halt(void); 57 extern void machine_power_off(void); 58 59 extern void machine_shutdown(void); 60 struct pt_regs; 61 extern void machine_crash_shutdown(struct pt_regs *); 62 63 /* 64 * Architecture independent implemenations of sys_reboot commands. 65 */ 66 67 extern void kernel_restart_prepare(char *cmd); 68 extern void kernel_restart(char *cmd); 69 extern void kernel_halt(void); 70 extern void kernel_power_off(void); 71 72 extern int C_A_D; /* for sysctl */ 73 void ctrl_alt_del(void); 74 75 #define POWEROFF_CMD_PATH_LEN 256 76 extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN]; 77 78 extern int orderly_poweroff(bool force); 79 80 /* 81 * Emergency restart, callable from an interrupt handler. 82 */ 83 84 extern void emergency_restart(void); 85 #include <asm/emergency-restart.h> 86 87 #endif 88 89 #endif /* _LINUX_REBOOT_H */ 90