| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * Unified handling of special chars. |
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| 4 | * |
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| 5 | * Copyright IBM Corp. 2001 |
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| 6 | * Author(s): Fritz Elfert <felfert@millenux.com> <elfert@de.ibm.com> |
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| 7 | * |
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| 8 | */ |
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| 9 | |
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| 10 | #include <linux/tty.h> |
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| 11 | #include <linux/sysrq.h> |
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| 12 | #include <linux/workqueue.h> |
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| 13 | |
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| 14 | extern unsigned int |
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| 15 | ctrlchar_handle(const unsigned char *buf, int len, struct tty_struct *tty); |
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| 16 | |
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| 17 | |
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| 18 | #define CTRLCHAR_NONE (1 << 8) |
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| 19 | #define CTRLCHAR_CTRL (2 << 8) |
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| 20 | #define CTRLCHAR_SYSRQ (3 << 8) |
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| 21 | |
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| 22 | #define CTRLCHAR_MASK (~0xffu) |
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| 23 | |
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| 24 | |
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| 25 | #ifdef CONFIG_MAGIC_SYSRQ |
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| 26 | struct sysrq_work { |
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| 27 | int key; |
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| 28 | struct work_struct work; |
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| 29 | }; |
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| 30 | |
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| 31 | void schedule_sysrq_work(struct sysrq_work *sw); |
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| 32 | #endif |
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| 33 | |
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