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85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*-
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* nullconsole.c
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*
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* Author: Doug Ambrisko <ambrisko@whistle.com>
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* Copyright (c) 2000 Whistle Communications, Inc.
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* All rights reserved.
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*
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* Subject to the following obligations and disclaimer of warranty, use and
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* redistribution of this software, in source or object code forms, with or
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* without modifications are expressly permitted by Whistle Communications;
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* provided, however, that:
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* 1. Any and all reproductions of the source or object code must include the
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* copyright notice above and the following disclaimer of warranties; and
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* 2. No rights are granted, in any manner or form, to use Whistle
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* Communications, Inc. trademarks, including the mark "WHISTLE
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* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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* such appears in the above copyright notice or in the software.
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*
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* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
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* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
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* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
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* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
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* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
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* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
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* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
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* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*/
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#include <stand.h>
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#include <bootstrap.h>
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static void nullc_probe(struct console *cp);
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static int nullc_init(int arg);
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static void nullc_putchar(int c);
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static int nullc_getchar(void);
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static int nullc_ischar(void);
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struct console nullconsole = {
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.c_name = "nullconsole",
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.c_desc = "null port",
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.c_probe = nullc_probe,
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.c_init = nullc_init,
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.c_out = nullc_putchar,
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.c_in = nullc_getchar,
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.c_ready = nullc_ischar
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};
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static void
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nullc_probe(struct console *cp)
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{
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cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
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}
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static int
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nullc_init(int arg)
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{
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return (0);
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}
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static void
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nullc_putchar(int c)
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{
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}
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static int
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nullc_getchar(void)
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{
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return (-1);
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}
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static int
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nullc_ischar(void)
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{
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return (0);
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}
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