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 */ 80