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: src/sys/i386/i386/cons.h,v 1.13.4.1 1999/09/05 08:11:04 peter Exp $
   40  */
   41 
   42 #ifndef _MACHINE_CONS_H_
   43 #define _MACHINE_CONS_H_ 1
   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 #ifdef KERNEL
   53 /*
   54  * XXX public functions in drivers should be declared in headers produced
   55  * by `config', not here.
   56  */
   57 cn_probe_t      pccnprobe;
   58 cn_init_t       pccninit;
   59 cn_getc_t       pccngetc;
   60 cn_checkc_t     pccncheckc;
   61 cn_putc_t       pccnputc;
   62 
   63 cn_probe_t      sccnprobe;
   64 cn_init_t       sccninit;
   65 cn_getc_t       sccngetc;
   66 cn_checkc_t     sccncheckc;
   67 cn_putc_t       sccnputc;
   68 
   69 cn_probe_t      siocnprobe;
   70 cn_init_t       siocninit;
   71 cn_getc_t       siocngetc;
   72 cn_checkc_t     siocncheckc;
   73 cn_putc_t       siocnputc;
   74 #endif /* KERNEL */
   75 
   76 struct consdev {
   77         cn_probe_t      *cn_probe;
   78                                 /* probe hardware and fill in consdev info */
   79         cn_init_t       *cn_init;
   80                                 /* turn on as console */
   81         cn_getc_t       *cn_getc;
   82                                 /* kernel getchar interface */
   83         cn_checkc_t     *cn_checkc;
   84                                 /* kernel "return char if available" interface */
   85         cn_putc_t       *cn_putc;
   86                                 /* kernel putchar interface */
   87         struct  tty *cn_tp;     /* tty structure for console device */
   88         dev_t   cn_dev;         /* major/minor of device */
   89         short   cn_pri;         /* pecking order; the higher the better */
   90 };
   91 
   92 /* values for cn_pri - reflect our policy for console selection */
   93 #define CN_DEAD         0       /* device doesn't exist */
   94 #define CN_NORMAL       1       /* device exists but is nothing special */
   95 #define CN_INTERNAL     2       /* "internal" bit-mapped display */
   96 #define CN_REMOTE       3       /* serial interface with remote bit set */
   97 
   98 /* XXX */
   99 #define CONSMAJOR       0
  100 
  101 #ifdef KERNEL
  102 extern  struct consdev constab[];
  103 extern  struct consdev *cn_tab;
  104 extern  int cons_unavail;
  105 
  106 struct proc; struct uio;
  107 
  108 /* other kernel entry points */
  109 extern void cninit(void);
  110 extern void cninit_finish(void);
  111 extern int cngetc(void);
  112 extern int cncheckc(void);
  113 extern void cnputc(int);
  114 extern int pg(const char *, ...);
  115 
  116 #endif /* KERNEL */
  117 #endif /* _MACHINE_CONS_H_ */

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