Initial import from FreeBSD RELENG_4:
[dragonfly.git] / sys / boot / pc32 / libi386 / nullconsole.c
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984263bc
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1/*
2 * nullconsole.c
3 *
4 * Copyright (c) 2000 Whistle Communications, Inc.
5 * All rights reserved.
6 *
7 * Subject to the following obligations and disclaimer of warranty, use and
8 * redistribution of this software, in source or object code forms, with or
9 * without modifications are expressly permitted by Whistle Communications;
10 * provided, however, that:
11 * 1. Any and all reproductions of the source or object code must include the
12 * copyright notice above and the following disclaimer of warranties; and
13 * 2. No rights are granted, in any manner or form, to use Whistle
14 * Communications, Inc. trademarks, including the mark "WHISTLE
15 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
16 * such appears in the above copyright notice or in the software.
17 *
18 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
19 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
20 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
21 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
23 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
24 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
25 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
26 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
27 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
28 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
29 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
34 * OF SUCH DAMAGE.
35 *
36 * Author: Doug Ambrisko <ambrisko@whistle.com>
37 *
38 * $FreeBSD: src/sys/boot/i386/libi386/nullconsole.c,v 1.1.2.1 2000/09/22 17:04:46 archie Exp $
39 */
40
41#include <stand.h>
42#include <bootstrap.h>
43
44static void nullc_probe(struct console *cp);
45static int nullc_init(int arg);
46static void nullc_putchar(int c);
47static int nullc_getchar(void);
48static int nullc_ischar(void);
49
50struct 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
61static void
62nullc_probe(struct console *cp)
63{
64 cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
65}
66
67static int
68nullc_init(int arg)
69{
70 return(0);
71}
72
73static void
74nullc_putchar(int c)
75{
76}
77
78static int
79nullc_getchar(void)
80{
81 return(-1);
82}
83
84static int
85nullc_ischar(void)
86{
87 return(0);
88}