xref: /freebsd/stand/i386/libi386/nullconsole.c (revision a90b9d0159070121c221b966469c3e36d912bf82)
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
58 nullc_probe(struct console *cp)
59 {
60 	cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
61 }
62 
63 static int
64 nullc_init(int arg)
65 {
66 	return (0);
67 }
68 
69 static void
70 nullc_putchar(int c)
71 {
72 }
73 
74 static int
75 nullc_getchar(void)
76 {
77 	return (-1);
78 }
79 
80 static int
81 nullc_ischar(void)
82 {
83 	return (0);
84 }
85