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83 lines
2.0 KiB
83 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* -*- linux-c -*- |
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* |
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* $Id: sysrq.h,v 1.3 1997/07/17 11:54:33 mj Exp $ |
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* |
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* Linux Magic System Request Key Hacks |
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* |
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* (c) 1997 Martin Mares <[email protected]> |
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* |
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* (c) 2000 Crutcher Dunnavant <[email protected]> |
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* overhauled to use key registration |
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* based upon discusions in irc://irc.openprojects.net/#kernelnewbies |
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*/ |
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#ifndef _LINUX_SYSRQ_H |
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#define _LINUX_SYSRQ_H |
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#include <linux/errno.h> |
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#include <linux/types.h> |
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/* Possible values of bitmask for enabling sysrq functions */ |
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/* 0x0001 is reserved for enable everything */ |
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#define SYSRQ_ENABLE_LOG 0x0002 |
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#define SYSRQ_ENABLE_KEYBOARD 0x0004 |
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#define SYSRQ_ENABLE_DUMP 0x0008 |
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#define SYSRQ_ENABLE_SYNC 0x0010 |
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#define SYSRQ_ENABLE_REMOUNT 0x0020 |
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#define SYSRQ_ENABLE_SIGNAL 0x0040 |
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#define SYSRQ_ENABLE_BOOT 0x0080 |
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#define SYSRQ_ENABLE_RTNICE 0x0100 |
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struct sysrq_key_op { |
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void (* const handler)(int); |
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const char * const help_msg; |
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const char * const action_msg; |
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const int enable_mask; |
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}; |
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#ifdef CONFIG_MAGIC_SYSRQ |
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/* Generic SysRq interface -- you may call it from any device driver, supplying |
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* ASCII code of the key, pointer to registers and kbd/tty structs (if they |
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* are available -- else NULL's). |
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*/ |
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void handle_sysrq(int key); |
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void __handle_sysrq(int key, bool check_mask); |
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int register_sysrq_key(int key, const struct sysrq_key_op *op); |
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int unregister_sysrq_key(int key, const struct sysrq_key_op *op); |
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extern const struct sysrq_key_op *__sysrq_reboot_op; |
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int sysrq_toggle_support(int enable_mask); |
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int sysrq_mask(void); |
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#else |
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static inline void handle_sysrq(int key) |
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{ |
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} |
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static inline void __handle_sysrq(int key, bool check_mask) |
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{ |
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} |
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static inline int register_sysrq_key(int key, const struct sysrq_key_op *op) |
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{ |
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return -EINVAL; |
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} |
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static inline int unregister_sysrq_key(int key, const struct sysrq_key_op *op) |
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{ |
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return -EINVAL; |
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} |
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static inline int sysrq_mask(void) |
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{ |
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/* Magic SysRq disabled mask */ |
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return 0; |
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} |
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#endif |
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#endif /* _LINUX_SYSRQ_H */
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