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
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 .c_name = "nullconsole",
49 .c_desc = "null port",
50 .c_probe = nullc_probe,
51 .c_init = nullc_init,
52 .c_out = nullc_putchar,
53 .c_in = nullc_getchar,
54 .c_ready = nullc_ischar
55 };
56
57 static void
nullc_probe(struct console * cp)58 nullc_probe(struct console *cp)
59 {
60 cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
61 }
62
63 static int
nullc_init(int arg)64 nullc_init(int arg)
65 {
66 return (0);
67 }
68
69 static void
nullc_putchar(int c)70 nullc_putchar(int c)
71 {
72 }
73
74 static int
nullc_getchar(void)75 nullc_getchar(void)
76 {
77 return (-1);
78 }
79
80 static int
nullc_ischar(void)81 nullc_ischar(void)
82 {
83 return (0);
84 }
85