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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