Change the kernel dev_t, representing a pointer to a specinfo structure,
[dragonfly.git] / sys / sys / cons.h
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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 * $FreeBSD: src/sys/sys/cons.h,v 1.24 2000/01/11 14:54:01 yokota Exp $
b13267a5 40 * $DragonFly: src/sys/sys/cons.h,v 1.6 2006/09/10 01:26:40 dillon Exp $
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41 */
42
43#ifndef _MACHINE_CONS_H_
44#define _MACHINE_CONS_H_
45
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46#ifndef _SYS_TYPES_H_
47#include <sys/types.h>
48#endif
49
984263bc 50struct consdev;
1bd40720 51
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52typedef void cn_probe_t (struct consdev *);
53typedef void cn_init_t (struct consdev *);
54typedef void cn_term_t (struct consdev *);
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55typedef int cn_getc_t (cdev_t);
56typedef int cn_checkc_t (cdev_t);
57typedef void cn_putc_t (cdev_t, int);
58typedef void cn_dbctl_t (cdev_t, int);
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59
60struct consdev {
61 cn_probe_t *cn_probe;
62 /* probe hardware and fill in consdev info */
63 cn_init_t *cn_init;
64 /* turn on as console */
65 cn_term_t *cn_term;
66 /* turn off as console */
67 cn_getc_t *cn_getc;
68 /* kernel getchar interface */
69 cn_checkc_t *cn_checkc;
70 /* kernel "return char if available" interface */
71 cn_putc_t *cn_putc;
72 /* kernel putchar interface */
73 cn_dbctl_t *cn_dbctl;
74 /* debugger control interface */
75 struct tty *cn_tp; /* tty structure for console device */
b13267a5 76 cdev_t cn_dev; /* major/minor of device */
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77 short cn_pri; /* pecking order; the higher the better */
78};
79
80/* values for cn_pri - reflect our policy for console selection */
81#define CN_DEAD 0 /* device doesn't exist */
82#define CN_NORMAL 1 /* device exists but is nothing special */
83#define CN_INTERNAL 2 /* "internal" bit-mapped display */
84#define CN_REMOTE 3 /* serial interface with remote bit set */
85
86#ifdef _KERNEL
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87extern int cons_unavail;
88extern struct consdev *cn_tab;
89
90#define CONS_DRIVER(name, probe, init, term, getc, checkc, putc, dbctl) \
91 static struct consdev name##_consdev = { \
92 probe, init, term, getc, checkc, putc, dbctl \
93 }; \
94 DATA_SET(cons_set, name##_consdev)
95
96/* Other kernel entry points. */
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97int cncheckc (void);
98int cngetc (void);
99void cninit (void);
100void cninit_finish (void);
101void cndbctl (int);
102void cnputc (int);
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103
104#endif /* _KERNEL */
105
106#endif /* !_MACHINE_CONS_H_ */