cons.h revision 620 
1/*
2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1991 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, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 *	from: @(#)cons.h	7.2 (Berkeley) 5/9/91
39 *	$Id$
40 */
41
42
43struct consdev {
44	int	(*cn_probe)();	/* probe hardware and fill in consdev info */
45	int	(*cn_init)();	/* turn on as console */
46	int	(*cn_getc)();	/* kernel getchar interface */
47	int	(*cn_putc)();	/* kernel putchar interface */
48	struct	tty *cn_tp;	/* tty structure for console device */
49	dev_t	cn_dev;		/* major/minor of device */
50	short	cn_pri;		/* pecking order; the higher the better */
51};
52
53/* values for cn_pri - reflect our policy for console selection */
54#define	CN_DEAD		0	/* device doesn't exist */
55#define CN_NORMAL	1	/* device exists but is nothing special */
56#define CN_INTERNAL	2	/* "internal" bit-mapped display */
57#define CN_REMOTE	3	/* serial interface with remote bit set */
58
59/* XXX */
60#define	CONSMAJOR	0
61
62#ifdef KERNEL
63extern	struct consdev constab[];
64extern	struct consdev *cn_tab;
65extern	struct tty *cn_tty;
66#endif
67