Catch attempts to queue to unregistered ISRs
[dragonfly.git] / sys / boot / pc32 / libi386 / nullconsole.c
CommitLineData
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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 $
1de703da 39 * $DragonFly: src/sys/boot/pc32/libi386/nullconsole.c,v 1.2 2003/06/17 04:28:18 dillon Exp $
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40 */
41
42#include <stand.h>
43#include <bootstrap.h>
44
45static void nullc_probe(struct console *cp);
46static int nullc_init(int arg);
47static void nullc_putchar(int c);
48static int nullc_getchar(void);
49static int nullc_ischar(void);
50
51struct console nullconsole = {
52 "nullconsole",
53 "null port",
54 0,
55 nullc_probe,
56 nullc_init,
57 nullc_putchar,
58 nullc_getchar,
59 nullc_ischar
60};
61
62static void
63nullc_probe(struct console *cp)
64{
65 cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
66}
67
68static int
69nullc_init(int arg)
70{
71 return(0);
72}
73
74static void
75nullc_putchar(int c)
76{
77}
78
79static int
80nullc_getchar(void)
81{
82 return(-1);
83}
84
85static int
86nullc_ischar(void)
87{
88 return(0);
89}