cons.h revision 42373 
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: cons.h,v 1.17 1997/07/01 00:54:37 bde Exp $
40 */
41
42#ifndef _MACHINE_CONS_H_
43#define	_MACHINE_CONS_H_
44
45struct consdev;
46typedef	void	cn_probe_t __P((struct consdev *));
47typedef	void	cn_init_t __P((struct consdev *));
48typedef	int	cn_getc_t __P((dev_t));
49typedef	int	cn_checkc_t __P((dev_t));
50typedef	void	cn_putc_t __P((dev_t, int));
51
52struct consdev {
53	cn_probe_t	*cn_probe;
54				/* probe hardware and fill in consdev info */
55	cn_init_t	*cn_init;
56				/* turn on as console */
57	cn_getc_t	*cn_getc;
58				/* kernel getchar interface */
59	cn_checkc_t	*cn_checkc;
60				/* kernel "return char if available" interface */
61	cn_putc_t	*cn_putc;
62				/* kernel putchar interface */
63	struct	tty *cn_tp;	/* tty structure for console device */
64	dev_t	cn_dev;		/* major/minor of device */
65	short	cn_pri;		/* pecking order; the higher the better */
66};
67
68/* values for cn_pri - reflect our policy for console selection */
69#define	CN_DEAD		0	/* device doesn't exist */
70#define CN_NORMAL	1	/* device exists but is nothing special */
71#define CN_INTERNAL	2	/* "internal" bit-mapped display */
72#define CN_REMOTE	3	/* serial interface with remote bit set */
73
74#ifdef KERNEL
75extern	struct linker_set cons_set;
76extern	int cons_unavail;
77
78#define CONS_DRIVER(name, probe, init, getc, checkc, putc)	\
79	static struct consdev name##_consdev = {		\
80		probe, init, getc, checkc, putc			\
81	};							\
82	DATA_SET(cons_set, name##_consdev);
83
84/* Other kernel entry points. */
85int	cncheckc __P((void));
86int	cngetc __P((void));
87void	cninit __P((void));
88void	cninit_finish __P((void));
89void	cnputc __P((int));
90
91#endif /* KERNEL */
92
93#endif /* !_MACHINE_CONS_H_ */
94