1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * Redistribution and use in source and binary forms are permitted provided 11 * that: (1) source distributions retain this entire copyright notice and 12 * comment, and (2) distributions including binaries display the following 13 * acknowledgement: ``This product includes software developed by the 14 * University of California, Berkeley and its contributors'' in the 15 * documentation or other materials provided with the distribution and in 16 * all advertising materials mentioning features or use of this software. 17 * Neither the name of the University nor the names of its contributors may 18 * be used to endorse or promote products derived from this software without 19 * specific prior written permission. 20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 21 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 23 * 24 * from: Utah $Hdr: cons.h 1.1 90/07/09$ 25 * 26 * @(#)cons.h 7.3 (Berkeley) 11/2/90 27 */ 28 29 struct consdev { 30 int (*cn_probe)(); /* probe hardware and fill in consdev info */ 31 int (*cn_init)(); /* turn on as console */ 32 int (*cn_getc)(); /* kernel getchar interface */ 33 int (*cn_putc)(); /* kernel putchar interface */ 34 struct tty *cn_tp; /* tty structure for console device */ 35 dev_t cn_dev; /* major/minor of device */ 36 short cn_pri; /* pecking order; the higher the better */ 37 }; 38 39 /* values for cn_pri - reflect our policy for console selection */ 40 #define CN_DEAD 0 /* device doesn't exist */ 41 #define CN_NORMAL 1 /* device exists but is nothing special */ 42 #define CN_INTERNAL 2 /* "internal" bit-mapped display */ 43 #define CN_REMOTE 3 /* serial interface with remote bit set */ 44 45 /* XXX */ 46 #define CONSMAJOR 0 47 48 #ifdef KERNEL 49 extern struct consdev constab[]; 50 extern struct consdev *cn_tab; 51 extern struct tty *cn_tty; 52 #endif 53