1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Unified handling of special chars. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright IBM Corp. 2001 6*4882a593Smuzhiyun * Author(s): Fritz Elfert <felfert@millenux.com> <elfert@de.ibm.com> 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include <linux/tty.h> 11*4882a593Smuzhiyun #include <linux/sysrq.h> 12*4882a593Smuzhiyun #include <linux/workqueue.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun extern unsigned int 15*4882a593Smuzhiyun ctrlchar_handle(const unsigned char *buf, int len, struct tty_struct *tty); 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define CTRLCHAR_NONE (1 << 8) 19*4882a593Smuzhiyun #define CTRLCHAR_CTRL (2 << 8) 20*4882a593Smuzhiyun #define CTRLCHAR_SYSRQ (3 << 8) 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #define CTRLCHAR_MASK (~0xffu) 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun #ifdef CONFIG_MAGIC_SYSRQ 26*4882a593Smuzhiyun struct sysrq_work { 27*4882a593Smuzhiyun int key; 28*4882a593Smuzhiyun struct work_struct work; 29*4882a593Smuzhiyun }; 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun void schedule_sysrq_work(struct sysrq_work *sw); 32*4882a593Smuzhiyun #endif 33