The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/cons.h

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    1 /*
    2  * Copyright (c) 1988 University of Utah.
    3  * Copyright (c) 1991 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: @(#)cons.h        7.2 (Berkeley) 5/9/91
   39  * $FreeBSD$
   40  */
   41 
   42 #ifndef _MACHINE_CONS_H_
   43 #define _MACHINE_CONS_H_
   44 
   45 struct consdev;
   46 typedef void    cn_probe_t __P((struct consdev *));
   47 typedef void    cn_init_t __P((struct consdev *));
   48 typedef int     cn_getc_t __P((dev_t));
   49 typedef int     cn_checkc_t __P((dev_t));
   50 typedef void    cn_putc_t __P((dev_t, int));
   51 
   52 struct consdev {
   53         cn_probe_t      *cn_probe;
   54                                 /* probe hardware and fill in consdev info */
   55         cn_init_t       *cn_init;
   56                                 /* turn on as console */
   57         cn_getc_t       *cn_getc;
   58                                 /* kernel getchar interface */
   59         cn_checkc_t     *cn_checkc;
   60                                 /* kernel "return char if available" interface */
   61         cn_putc_t       *cn_putc;
   62                                 /* kernel putchar interface */
   63         struct  tty *cn_tp;     /* tty structure for console device */
   64         dev_t   cn_dev;         /* major/minor of device */
   65         short   cn_pri;         /* pecking order; the higher the better */
   66 };
   67 
   68 /* values for cn_pri - reflect our policy for console selection */
   69 #define CN_DEAD         0       /* device doesn't exist */
   70 #define CN_NORMAL       1       /* device exists but is nothing special */
   71 #define CN_INTERNAL     2       /* "internal" bit-mapped display */
   72 #define CN_REMOTE       3       /* serial interface with remote bit set */
   73 
   74 #ifdef KERNEL
   75 extern  struct linker_set cons_set;
   76 extern  int cons_unavail;
   77 
   78 #define CONS_DRIVER(name, probe, init, getc, checkc, putc)      \
   79         static struct consdev name##_consdev = {                \
   80                 probe, init, getc, checkc, putc                 \
   81         };                                                      \
   82         DATA_SET(cons_set, name##_consdev)
   83 
   84 /* Other kernel entry points. */
   85 int     cncheckc __P((void));
   86 int     cngetc __P((void));
   87 void    cninit __P((void));
   88 void    cninit_finish __P((void));
   89 void    cnputc __P((int));
   90 
   91 #endif /* KERNEL */
   92 
   93 #endif /* !_MACHINE_CONS_H_ */

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