projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* -*- linux-c -*- |
| 2 | * | |
| 3 | * $Id: sysrq.h,v 1.3 1997/07/17 11:54:33 mj Exp $ | |
| 4 | * | |
| 5 | * Linux Magic System Request Key Hacks | |
| 6 | * | |
| 7 | * (c) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
| 8 | * | |
| 9 | * (c) 2000 Crutcher Dunnavant <crutcher+kernel@datastacks.com> | |
| 10 | * overhauled to use key registration | |
| 11 | * based upon discusions in irc://irc.openprojects.net/#kernelnewbies | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/config.h> | |
| 15 | ||
| 16 | struct pt_regs; | |
| 17 | struct tty_struct; | |
| 18 | ||
| 19 | /* Possible values of bitmask for enabling sysrq functions */ | |
| 20 | /* 0x0001 is reserved for enable everything */ | |
| 21 | #define SYSRQ_ENABLE_LOG 0x0002 | |
| 22 | #define SYSRQ_ENABLE_KEYBOARD 0x0004 | |
| 23 | #define SYSRQ_ENABLE_DUMP 0x0008 | |
| 24 | #define SYSRQ_ENABLE_SYNC 0x0010 | |
| 25 | #define SYSRQ_ENABLE_REMOUNT 0x0020 | |
| 26 | #define SYSRQ_ENABLE_SIGNAL 0x0040 | |
| 27 | #define SYSRQ_ENABLE_BOOT 0x0080 | |
| 28 | #define SYSRQ_ENABLE_RTNICE 0x0100 | |
| 29 | ||
| 30 | struct sysrq_key_op { | |
| 31 | void (*handler)(int, struct pt_regs *, struct tty_struct *); | |
| 32 | char *help_msg; | |
| 33 | char *action_msg; | |
| 34 | int enable_mask; | |
| 35 | }; | |
| 36 | ||
| 37 | #ifdef CONFIG_MAGIC_SYSRQ | |
| 38 | ||
| 39 | /* Generic SysRq interface -- you may call it from any device driver, supplying | |
| 40 | * ASCII code of the key, pointer to registers and kbd/tty structs (if they | |
| 41 | * are available -- else NULL's). | |
| 42 | */ | |
| 43 | ||
| 44 | void handle_sysrq(int, struct pt_regs *, struct tty_struct *); | |
| 45 | void __handle_sysrq(int, struct pt_regs *, struct tty_struct *, int check_mask); | |
| 46 | int register_sysrq_key(int, struct sysrq_key_op *); | |
| 47 | int unregister_sysrq_key(int, struct sysrq_key_op *); | |
| 48 | struct sysrq_key_op *__sysrq_get_key_op(int key); | |
| 49 | ||
| 50 | #else | |
| 51 | ||
| 52 | static inline int __reterr(void) | |
| 53 | { | |
| 54 | return -EINVAL; | |
| 55 | } | |
| 56 | ||
| 57 | #define register_sysrq_key(ig,nore) __reterr() | |
| 58 | #define unregister_sysrq_key(ig,nore) __reterr() | |
| 59 | ||
| 60 | #endif |