1 /*-
2 * nullconsole.c
3 *
4 * Author: Doug Ambrisko <[email protected]>
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
38 #include <stand.h>
39 #include <bootstrap.h>
40
41 static void nullc_probe(struct console *cp);
42 static int nullc_init(int arg);
43 static void nullc_putchar(int c);
44 static int nullc_getchar(void);
45 static int nullc_ischar(void);
46
47 struct console nullconsole = {
48 "nullconsole",
49 "null port",
50 0,
51 nullc_probe,
52 nullc_init,
53 nullc_putchar,
54 nullc_getchar,
55 nullc_ischar
56 };
57
58 static void
nullc_probe(struct console * cp)59 nullc_probe(struct console *cp)
60 {
61 cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
62 }
63
64 static int
nullc_init(int arg)65 nullc_init(int arg)
66 {
67 return(0);
68 }
69
70 static void
nullc_putchar(int c)71 nullc_putchar(int c)
72 {
73 }
74
75 static int
nullc_getchar(void)76 nullc_getchar(void)
77 {
78 return(-1);
79 }
80
81 static int
nullc_ischar(void)82 nullc_ischar(void)
83 {
84 return(0);
85 }
86