| bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 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 | |
| 13 | |
| 14 | /* |
| 15 | * Commands accepted by the _reboot() system call. |
| 16 | * |
| 17 | * RESTART Restart system using default command and mode. |
| 18 | * HALT Stop OS and give system control to ROM monitor, if any. |
| 19 | * CAD_ON Ctrl-Alt-Del sequence causes RESTART command. |
| 20 | * CAD_OFF Ctrl-Alt-Del sequence sends SIGINT to init task. |
| 21 | * POWER_OFF Stop OS and remove all power from system, if possible. |
| 22 | * RESTART2 Restart system using given command string. |
| 23 | */ |
| 24 | |
| 25 | #define LINUX_REBOOT_CMD_RESTART 0x01234567 |
| 26 | #define LINUX_REBOOT_CMD_HALT 0xCDEF0123 |
| 27 | #define LINUX_REBOOT_CMD_CAD_ON 0x89ABCDEF |
| 28 | #define LINUX_REBOOT_CMD_CAD_OFF 0x00000000 |
| 29 | #define LINUX_REBOOT_CMD_POWER_OFF 0x4321FEDC |
| 30 | #define LINUX_REBOOT_CMD_RESTART2 0xA1B2C3D4 |
| 31 | |
| 32 | /* Including <unistd.h> makes sure that on a glibc system |
| 33 | <features.h> is included, which again defines __GLIBC__ */ |
| 34 | #include <unistd.h> |
| 35 | #include "linux_reboot.h" |
| 36 | |
| 37 | #define USE_LIBC |
| 38 | |
| 39 | #ifdef USE_LIBC |
| 40 | |
| 41 | /* libc version */ |
| 42 | #if defined __GLIBC__ && __GLIBC__ >= 2 |
| 43 | # include <sys/reboot.h> |
| 44 | # define REBOOT(cmd) reboot(cmd) |
| 45 | #else |
| 46 | extern int reboot(int, int, int); |
| 47 | # define REBOOT(cmd) reboot(LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,(cmd)) |
| 48 | #endif |
| 49 | static inline int my_reboot(int cmd) { |
| 50 | return REBOOT(cmd); |
| 51 | } |
| 52 | |
| 53 | #else /* no USE_LIBC */ |
| 54 | |
| 55 | /* direct syscall version */ |
| 56 | #include <linux/unistd.h> |
| 57 | |
| 58 | #ifdef _syscall3 |
| 59 | _syscall3(int, reboot, int, magic, int, magic_too, int, cmd); |
| 60 | #else |
| 61 | /* Let us hope we have a 3-argument reboot here */ |
| 62 | extern int reboot(int, int, int); |
| 63 | #endif |
| 64 | |
| 65 | static inline int my_reboot(int cmd) { |
| 66 | return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd); |
| 67 | } |
| 68 | |
| 69 | #endif |
| 70 | |
| 71 | |
| 72 | #endif /* _LINUX_REBOOT_H */ |