93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah Hdr: cons.c 1.7 92/02/28
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* from: @(#)cons.c 8.1 (Berkeley) 6/10/93
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*
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* $Id: cons.c,v 1.1 1994/05/30 19:58:47 phil Exp $
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*/
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#include <sys/param.h>
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#include <dev/cons.h>
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#include "samachdep.h"
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#ifdef SCNCONSOLE
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int scnprobe(), scninit(), scngetchar(), scnputchar();
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#endif
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struct consdev constab[] = {
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#ifdef SCNCONSOLE
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{ scnprobe, scninit, scngetchar, scnputchar },
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#endif
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{ 0 },
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};
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struct consdev *cn_tab;
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int noconsole;
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cninit()
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{
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register struct consdev *cp;
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cn_tab = NULL;
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noconsole = 1;
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for (cp = constab; cp->cn_probe; cp++) {
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(*cp->cn_probe)(cp);
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if (cp->cn_pri > CN_DEAD &&
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(cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri))
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cn_tab = cp;
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}
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if (cn_tab) {
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(*cn_tab->cn_init)(cn_tab);
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noconsole = 0;
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}
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}
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cngetc()
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{
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if (cn_tab)
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return((*cn_tab->cn_getc)());
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return(0);
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}
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cnputc(c)
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int c;
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{
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if (cn_tab)
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(*cn_tab->cn_putc)(c);
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}
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