3 * $Id: sysrq.h,v 1.3 1997/07/17 11:54:33 mj Exp $
5 * Linux Magic System Request Key Hacks
7 * (c) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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
18 /* Possible values of bitmask for enabling sysrq functions */
19 /* 0x0001 is reserved for enable everything */
20 #define SYSRQ_ENABLE_LOG 0x0002
21 #define SYSRQ_ENABLE_KEYBOARD 0x0004
22 #define SYSRQ_ENABLE_DUMP 0x0008
23 #define SYSRQ_ENABLE_SYNC 0x0010
24 #define SYSRQ_ENABLE_REMOUNT 0x0020
25 #define SYSRQ_ENABLE_SIGNAL 0x0040
26 #define SYSRQ_ENABLE_BOOT 0x0080
27 #define SYSRQ_ENABLE_RTNICE 0x0100
30 void (*handler)(int, struct pt_regs *, struct tty_struct *);
36 #ifdef CONFIG_MAGIC_SYSRQ
38 /* Generic SysRq interface -- you may call it from any device driver, supplying
39 * ASCII code of the key, pointer to registers and kbd/tty structs (if they
40 * are available -- else NULL's).
43 void handle_sysrq(int, struct pt_regs *, struct tty_struct *);
44 void __handle_sysrq(int, struct pt_regs *, struct tty_struct *, int check_mask);
45 int register_sysrq_key(int, struct sysrq_key_op *);
46 int unregister_sysrq_key(int, struct sysrq_key_op *);
47 struct sysrq_key_op *__sysrq_get_key_op(int key);
51 static inline int __reterr(void)
56 #define register_sysrq_key(ig,nore) __reterr()
57 #define unregister_sysrq_key(ig,nore) __reterr()