[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / sysrq.h

/* -*- linux-c -*-
 *
 *	$Id: sysrq.h,v 1.3 1997/07/17 11:54:33 mj Exp $
 *
 *	Linux Magic System Request Key Hacks
 *
 *	(c) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
 *
 *	(c) 2000 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
 *	overhauled to use key registration
 *	based upon discusions in irc://irc.openprojects.net/#kernelnewbies
 */

#ifndef _LINUX_SYSRQ_H
#define _LINUX_SYSRQ_H

struct pt_regs;
struct tty_struct;

/* Possible values of bitmask for enabling sysrq functions */
/* 0x0001 is reserved for enable everything */
#define SYSRQ_ENABLE_LOG	0x0002
#define SYSRQ_ENABLE_KEYBOARD	0x0004
#define SYSRQ_ENABLE_DUMP	0x0008
#define SYSRQ_ENABLE_SYNC	0x0010
#define SYSRQ_ENABLE_REMOUNT	0x0020
#define SYSRQ_ENABLE_SIGNAL	0x0040
#define SYSRQ_ENABLE_BOOT	0x0080
#define SYSRQ_ENABLE_RTNICE	0x0100

struct sysrq_key_op {
	void (*handler)(int, struct tty_struct *);
	char *help_msg;
	char *action_msg;
	int enable_mask;
};

#ifdef CONFIG_MAGIC_SYSRQ

/* Generic SysRq interface -- you may call it from any device driver, supplying
 * ASCII code of the key, pointer to registers and kbd/tty structs (if they
 * are available -- else NULL's).
 */

void handle_sysrq(int, struct tty_struct *);
void __handle_sysrq(int, struct tty_struct *, int check_mask);
int register_sysrq_key(int, struct sysrq_key_op *);
int unregister_sysrq_key(int, struct sysrq_key_op *);
struct sysrq_key_op *__sysrq_get_key_op(int key);

#else

static inline int __reterr(void)
{
	return -EINVAL;
}

#define register_sysrq_key(ig,nore) __reterr()
#define unregister_sysrq_key(ig,nore) __reterr()

#endif

#endif /* _LINUX_SYSRQ_H */
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
89bbc03c TP	14	#ifndef _LINUX_SYSRQ_H
89bbc03c TP	15	#define _LINUX_SYSRQ_H
1da177e4 LT	16
	17	struct pt_regs;
	18	struct tty_struct;
	19
	20	/* Possible values of bitmask for enabling sysrq functions */
	21	/* 0x0001 is reserved for enable everything */
	22	#define SYSRQ_ENABLE_LOG 0x0002
	23	#define SYSRQ_ENABLE_KEYBOARD 0x0004
	24	#define SYSRQ_ENABLE_DUMP 0x0008
	25	#define SYSRQ_ENABLE_SYNC 0x0010
	26	#define SYSRQ_ENABLE_REMOUNT 0x0020
	27	#define SYSRQ_ENABLE_SIGNAL 0x0040
	28	#define SYSRQ_ENABLE_BOOT 0x0080
	29	#define SYSRQ_ENABLE_RTNICE 0x0100
	30
	31	struct sysrq_key_op {
7d12e780	32	void (handler)(int, struct tty_struct );
1da177e4 LT	33	char *help_msg;
	34	char *action_msg;
	35	int enable_mask;
	36	};
	37
	38	#ifdef CONFIG_MAGIC_SYSRQ
	39
	40	/* Generic SysRq interface -- you may call it from any device driver, supplying
	41	* ASCII code of the key, pointer to registers and kbd/tty structs (if they
	42	* are available -- else NULL's).
	43	*/
	44
7d12e780 DH	45	void handle_sysrq(int, struct tty_struct *);
7d12e780 DH	46	void __handle_sysrq(int, struct tty_struct *, int check_mask);
1da177e4 LT	47	int register_sysrq_key(int, struct sysrq_key_op *);
	48	int unregister_sysrq_key(int, struct sysrq_key_op *);
	49	struct sysrq_key_op *__sysrq_get_key_op(int key);
	50
	51	#else
	52
	53	static inline int __reterr(void)
	54	{
	55	return -EINVAL;
	56	}
	57
	58	#define register_sysrq_key(ig,nore) __reterr()
	59	#define unregister_sysrq_key(ig,nore) __reterr()
	60
	61	#endif
89bbc03c TP	62
89bbc03c TP	63	#endif /* _LINUX_SYSRQ_H */