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cons.h revision 1.2 
      1 /*
      2  * Copyright (c) 1988 University of Utah.
      3  * Copyright (c) 1990 The Regents of the University of California.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to Berkeley by
      7  * the Systems Programming Group of the University of Utah Computer
      8  * Science Department.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  * from: Utah $Hdr: cons.h 1.1 90/07/09$
     39  *
     40  *	from: @(#)cons.h	7.3 (Berkeley) 11/2/90
     41  *	$Id: cons.h,v 1.2 1993/05/22 07:57:19 cgd Exp $
     42  */
     43 
     44 struct consdev {
     45 	int	(*cn_probe)();	/* probe hardware and fill in consdev info */
     46 	int	(*cn_init)();	/* turn on as console */
     47 	int	(*cn_getc)();	/* kernel getchar interface */
     48 	int	(*cn_putc)();	/* kernel putchar interface */
     49 	struct	tty *cn_tp;	/* tty structure for console device */
     50 	dev_t	cn_dev;		/* major/minor of device */
     51 	short	cn_pri;		/* pecking order; the higher the better */
     52 };
     53 
     54 /* values for cn_pri - reflect our policy for console selection */
     55 #define	CN_DEAD		0	/* device doesn't exist */
     56 #define CN_NORMAL	1	/* device exists but is nothing special */
     57 #define CN_INTERNAL	2	/* "internal" bit-mapped display */
     58 #define CN_REMOTE	3	/* serial interface with remote bit set */
     59 
     60 /* XXX */
     61 #define	CONSMAJOR	0
     62 
     63 #ifdef KERNEL
     64 extern	struct consdev constab[];
     65 extern	struct consdev *cn_tab;
     66 extern	struct tty *cn_tty;
     67 #endif
     68