1 /*-
2 * nullconsole.c
3 *
4 * Author: Doug Ambrisko <ambrisko@whistle.com>
5 * Copyright (c) 2000 Whistle Communications, Inc.
6 * All rights reserved.
7 *
8 * Subject to the following obligations and disclaimer of warranty, use and
9 * redistribution of this software, in source or object code forms, with or
10 * without modifications are expressly permitted by Whistle Communications;
11 * provided, however, that:
12 * 1. Any and all reproductions of the source or object code must include the
13 * copyright notice above and the following disclaimer of warranties; and
14 * 2. No rights are granted, in any manner or form, to use Whistle
15 * Communications, Inc. trademarks, including the mark "WHISTLE
16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
17 * such appears in the above copyright notice or in the software.
18 *
19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
35 * OF SUCH DAMAGE.
36 *
37 * $FreeBSD: src/sys/boot/i386/libi386/nullconsole.c,v 1.2 2003/08/25 23:28:31 obrien Exp $
38 * $DragonFly: src/sys/boot/pc32/libi386/nullconsole.c,v 1.3 2003/11/10 06:08:36 dillon Exp $
39 */
40
41 #include <stand.h>
42 #include <bootstrap.h>
43
44 static void nullc_probe(struct console *cp);
45 static int nullc_init(int arg);
46 static void nullc_putchar(int c);
47 static int nullc_getchar(void);
48 static int nullc_ischar(void);
49
50 struct console nullconsole = {
51 "nullconsole",
52 "null port",
53 0,
54 nullc_probe,
55 nullc_init,
56 nullc_putchar,
57 nullc_getchar,
58 nullc_ischar
59 };
60
61 static void
nullc_probe(struct console * cp)62 nullc_probe(struct console *cp)
63 {
64 cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
65 }
66
67 static int
nullc_init(int arg)68 nullc_init(int arg)
69 {
70 return(0);
71 }
72
73 static void
nullc_putchar(int c)74 nullc_putchar(int c)
75 {
76 }
77
78 static int
nullc_getchar(void)79 nullc_getchar(void)
80 {
81 return(-1);
82 }
83
84 static int
nullc_ischar(void)85 nullc_ischar(void)
86 {
87 return(0);
88 }
89