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cons.h revision 1.12 
      1 /*	$NetBSD: cons.h,v 1.12 1995/11/25 00:03:41 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1990, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by the University of
     23  *	California, Berkeley and its contributors.
     24  * 4. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  * from: Utah $Hdr: cons.h 1.6 92/01/21$
     41  *
     42  *	@(#)cons.h	8.1 (Berkeley) 6/10/93
     43  */
     44 
     45 struct consdev {
     46 	void	(*cn_probe)	/* probe hardware and fill in consdev info */
     47 		    __P((struct consdev *));
     48 	void	(*cn_init)	/* turn on as console */
     49 		    __P((struct consdev *));
     50 	int	(*cn_getc)	/* kernel getchar interface */
     51 		    __P((dev_t));
     52 	void	(*cn_putc)	/* kernel putchar interface */
     53 		    __P((dev_t, int));
     54 	void	(*cn_pollc)	/* turn on and off polling */
     55 		    __P((dev_t, int));
     56 	dev_t	cn_dev;		/* major/minor of device */
     57 	int	cn_pri;		/* pecking order; the higher the better */
     58 };
     59 
     60 /* values for cn_pri - reflect our policy for console selection */
     61 #define	CN_DEAD		0	/* device doesn't exist */
     62 #define CN_NORMAL	1	/* device exists but is nothing special */
     63 #define CN_INTERNAL	2	/* "internal" bit-mapped display */
     64 #define CN_REMOTE	3	/* serial interface with remote bit set */
     65 
     66 /* XXX */
     67 #define	CONSMAJOR	0
     68 
     69 #ifdef _KERNEL
     70 
     71 extern	struct consdev constab[];
     72 extern	struct consdev *cn_tab;
     73 
     74 void	cninit __P((void));
     75 int	cnopen __P((dev_t, int, int, struct proc *));
     76 int	cnclose __P((dev_t, int, int, struct proc *));
     77 int	cnread __P((dev_t, struct uio *, int));
     78 int	cnwrite __P((dev_t, struct uio *, int));
     79 int	cnioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
     80 int	cnselect __P((dev_t, int, struct proc *));
     81 int	cngetc __P((void));
     82 int	cnputc __P((int));
     83 void	nullcnpollc __P((dev_t, int));
     84 
     85 /* console-specific types */
     86 #define	dev_type_cnprobe(n)	void n __P((struct consdev *))
     87 #define	dev_type_cninit(n)	void n __P((struct consdev *))
     88 #define	dev_type_cngetc(n)	int n __P((dev_t))
     89 #define	dev_type_cnputc(n)	void n __P((dev_t, int))
     90 #define	dev_type_cnpollc(n)	void n __P((dev_t, int))
     91 
     92 #define	cons_decl(n) \
     93 	dev_decl(n,cnprobe); dev_decl(n,cninit); dev_decl(n,cngetc); \
     94 	dev_decl(n,cnputc); dev_decl(n,cnpollc)
     95 
     96 #define	cons_init(n) { \
     97 	dev_init(1,n,cnprobe), dev_init(1,n,cninit), dev_init(1,n,cngetc), \
     98 	dev_init(1,n,cnputc), dev_init(1,n,cnpollc) }
     99 
    100 #endif
    101