1 /* $NetBSD: cons.c,v 1.1 2014/02/24 07:23:43 skrll Exp $ */
2
3 /*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah Hdr: cons.c 1.7 92/02/28
37 *
38 * @(#)cons.c 8.1 (Berkeley) 6/10/93
39 */
40
41 #include "libsa.h"
42 #include <sys/param.h>
43 #include <dev/cons.h>
44
45 int noconsole;
46
47 void
cninit(void)48 cninit(void)
49 {
50 struct consdev *cp;
51
52 cn_tab = NULL;
53 noconsole = 1;
54 for (cp = constab; cp->cn_probe; cp++) {
55 (*cp->cn_probe)(cp);
56 if (cp->cn_pri > CN_DEAD &&
57 (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri)) {
58 cn_tab = cp;
59 }
60 }
61 if (cn_tab) {
62 (*cn_tab->cn_init)(cn_tab);
63 noconsole = 0;
64 }
65 }
66
67 int
cngetc(void)68 cngetc(void)
69 {
70
71 if (cn_tab)
72 return((*cn_tab->cn_getc)(0));
73 return(0);
74 }
75
76 int
tcngetc(void)77 tcngetc(void)
78 {
79 if (cn_tab)
80 return((*cn_tab->cn_getc)(0x80));
81 return(0);
82 }
83
84 void
cnputc(int c)85 cnputc(int c)
86 {
87
88 /* Note: the dev_t arguments are not used! */
89 if (cn_tab)
90 (*cn_tab->cn_putc)(0, c);
91 }
92