FreeBSD/Linux Kernel Cross Reference
sys/sys/cons.h
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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: @(#)cons.h 7.2 (Berkeley) 5/9/91
35 * $FreeBSD: releng/5.4/sys/sys/cons.h 145335 2005-04-20 19:11:07Z cvs2svn $
36 */
37
38 #ifndef _MACHINE_CONS_H_
39 #define _MACHINE_CONS_H_
40
41 struct consdev;
42 typedef void cn_probe_t(struct consdev *);
43 typedef void cn_init_t(struct consdev *);
44 typedef void cn_term_t(struct consdev *);
45 typedef int cn_getc_t(struct consdev *);
46 typedef int cn_checkc_t(struct consdev *);
47 typedef void cn_putc_t(struct consdev *, int);
48 typedef void cn_dbctl_t(struct consdev *, int);
49
50 struct consdev {
51 cn_probe_t *cn_probe;
52 /* probe hardware and fill in consdev info */
53 cn_init_t *cn_init;
54 /* turn on as console */
55 cn_term_t *cn_term;
56 /* turn off 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 cn_dbctl_t *cn_dbctl;
64 /* debugger control interface */
65 struct tty *cn_tp; /* tty structure for console device */
66 short cn_pri; /* pecking order; the higher the better */
67 void *cn_arg; /* drivers method argument */
68 int cn_unit; /* some drivers prefer this */
69 int cn_flags; /* capabilities of this console */
70 char cn_name[SPECNAMELEN + 1]; /* console (device) name */
71 };
72
73 /* values for cn_pri - reflect our policy for console selection */
74 #define CN_DEAD 0 /* device doesn't exist */
75 #define CN_LOW 1 /* device is a last restort only */
76 #define CN_NORMAL 2 /* device exists but is nothing special */
77 #define CN_INTERNAL 3 /* "internal" bit-mapped display */
78 #define CN_REMOTE 4 /* serial interface with remote bit set */
79
80 /* Values for cn_flags. */
81 #define CN_FLAG_NODEBUG 0x00000001 /* Not supported with debugger. */
82 #define CN_FLAG_NOAVAIL 0x00000002 /* Temporarily not available. */
83
84 #ifdef _KERNEL
85
86 #define CONS_DRIVER(name, probe, init, term, getc, checkc, putc, dbctl) \
87 static struct consdev name##_consdev = { \
88 probe, init, term, getc, checkc, putc, dbctl \
89 }; \
90 DATA_SET(cons_set, name##_consdev)
91
92 /* Other kernel entry points. */
93 void cninit(void);
94 void cninit_finish(void);
95 int cnadd(struct consdev *);
96 void cnavailable(struct consdev *, int);
97 void cnremove(struct consdev *);
98 void cnselect(struct consdev *);
99 int cncheckc(void);
100 int cngetc(void);
101 void cndbctl(int);
102 void cnputc(int);
103 int cnunavailable(void);
104
105 #endif /* _KERNEL */
106
107 #endif /* !_MACHINE_CONS_H_ */
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