1/*	$OpenBSD: cons.h,v 1.20 2024/05/13 01:15:50 jsg Exp $	*/
2/*	$NetBSD: cons.h,v 1.14 1996/03/14 19:08:35 christos Exp $	*/
3
4/*
5 * Copyright (c) 1988 University of Utah.
6 * Copyright (c) 1990, 1993
7 *	The Regents of the University of California.  All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * the Systems Programming Group of the University of Utah Computer
11 * Science Department.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: Utah $Hdr: cons.h 1.6 92/01/21$
38 *
39 *	@(#)cons.h	8.1 (Berkeley) 6/10/93
40 */
41
42struct consdev {
43				/* probe hardware and fill in consdev info */
44	void	(*cn_probe)(struct consdev *);
45				/* turn on as console */
46	void	(*cn_init)(struct consdev *);
47				/* kernel getchar interface */
48	int	(*cn_getc)(dev_t);
49				/* kernel putchar interface */
50	void	(*cn_putc)(dev_t, int);
51				/* turn on and off polling */
52	void	(*cn_pollc)(dev_t, int);
53				/* ring bell */
54	void	(*cn_bell)(dev_t, u_int, u_int, u_int);
55	dev_t	cn_dev;		/* major/minor of device */
56	u_int	cn_pri;		/* picking order; the higher the better */
57};
58
59/* Values for cn_pri - policy for console selection. */
60#define	CN_DEAD		0	/* Device does not exist. */
61#define CN_LOWPRI	1	/* Device exists and is low priority. */
62#define CN_MIDPRI	2	/* Device exists and is medium priority. */
63#define CN_HIGHPRI	3	/* Device exists and is high priority. */
64#define	CN_FORCED	4	/* Use this device. */
65
66/* XXX */
67#define	CONSMAJOR	0
68
69#ifdef _KERNEL
70
71extern	struct consdev constab[];
72extern	struct consdev *cn_tab;
73extern	struct tty *constty;
74extern	struct vnode *cn_devvp;
75
76struct knote;
77
78void	cninit(void);
79int	cnopen(dev_t, int, int, struct proc *);
80int	cnclose(dev_t, int, int, struct proc *);
81int	cnread(dev_t, struct uio *, int);
82int	cnwrite(dev_t, struct uio *, int);
83int	cnioctl(dev_t, u_long, caddr_t, int, struct proc *);
84int	cnkqfilter(dev_t, struct knote *);
85int	cngetc(void);
86void	cnputc(int);
87void	cnpollc(int);
88void	cnbell(u_int, u_int, u_int);
89void	nullcnpollc(dev_t, int);
90
91/* console-specific types */
92#define	dev_type_cnprobe(n)	void n(struct consdev *)
93#define	dev_type_cninit(n)	void n(struct consdev *)
94#define	dev_type_cngetc(n)	int n(dev_t)
95#define	dev_type_cnputc(n)	void n(dev_t, int)
96#define	dev_type_cnpollc(n)	void n(dev_t, int)
97#define	dev_type_cnbell(n)	void n(dev_t, u_int, u_int, u_int)
98
99#define	cons_decl(n) \
100	dev_decl(n,cnprobe); dev_decl(n,cninit); dev_decl(n,cngetc); \
101	dev_decl(n,cnputc); dev_decl(n,cnpollc); dev_decl(n,cnbell);
102
103#define	cons_init(n) { \
104	dev_init(1,n,cnprobe), dev_init(1,n,cninit), dev_init(1,n,cngetc), \
105	dev_init(1,n,cnputc), dev_init(1,n,cnpollc), NULL, \
106	NODEV, CN_DEAD }
107
108#define cons_init_bell(n) { \
109	dev_init(1,n,cnprobe), dev_init(1,n,cninit), dev_init(1,n,cngetc), \
110	dev_init(1,n,cnputc), dev_init(1,n,cnpollc), dev_init(1,n,cnbell), \
111	NODEV, CN_DEAD }
112
113#endif
114