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/sys/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/sys/cons.h,v 1.24 2000/01/11 14:54:01 yokota Exp $
   40  * $DragonFly: src/sys/sys/cons.h,v 1.7 2007/05/07 05:21:42 dillon Exp $
   41  */
   42 
   43 #ifndef _MACHINE_CONS_H_
   44 #define _MACHINE_CONS_H_
   45 
   46 #ifndef _SYS_TYPES_H_
   47 #include <sys/types.h>
   48 #endif
   49 
   50 struct consdev;
   51 
   52 typedef void    cn_probe_t (struct consdev *);
   53 typedef void    cn_init_t (struct consdev *);
   54 typedef void    cn_init_fini_t (struct consdev *);
   55 typedef void    cn_term_t (struct consdev *);
   56 typedef int     cn_getc_t (void *);
   57 typedef int     cn_checkc_t (void *);
   58 typedef void    cn_putc_t (void *, int);
   59 typedef void    cn_dbctl_t (void *, int);
   60 
   61 struct consdev {
   62         cn_probe_t      *cn_probe;      /* probe hardware */
   63         cn_init_t       *cn_init;       /* initialize for use */
   64         cn_init_fini_t  *cn_init_fini;  /* tie in cdev_t */
   65         cn_term_t       *cn_term;       /* terminate use as console */
   66         cn_getc_t       *cn_getc;       /* kernel getchar interface */
   67         cn_checkc_t     *cn_checkc;     /* kernel test char ready */
   68         cn_putc_t       *cn_putc;       /* kernel putchar interface */
   69         cn_dbctl_t      *cn_dbctl;      /* debugger control interface */
   70         struct  tty *cn_tp;     /* tty structure for console device */
   71         cdev_t  cn_dev;         /* device after cn_init_fini tie-in */
   72         short   cn_pri;         /* pecking order; the higher the better */
   73         short   cn_probegood;   /* probe routine must set to non-zero */
   74         void    *cn_private;    /* private data for get/check/put/dbctl */
   75         void    *cn_gdbprivate; /* private data for gdb */
   76         int             cn_unit;        /* some drivers prefer this */
   77         int             cn_flags;       /* capabilities of this console */
   78         //char  cn_name[SPECNAMELEN + 1];       /* console (device) name */
   79 
   80 };
   81 
   82 /* Values for cn_flags. */
   83 #define CN_FLAG_NODEBUG 0x00000001      /* Not supported with debugger. */
   84 #define CN_FLAG_NOAVAIL 0x00000002      /* Temporarily not available. */
   85 
   86 
   87 /* values for cn_pri - reflect our policy for console selection */
   88 #define CN_DEAD         0       /* device doesn't exist */
   89 #define CN_NORMAL       1       /* device exists but is nothing special */
   90 #define CN_INTERNAL     2       /* "internal" bit-mapped display */
   91 #define CN_REMOTE       3       /* serial interface with remote bit set */
   92 
   93 #ifdef _KERNEL
   94 extern  int cons_unavail;
   95 extern  int sysbeep_enable;             /* enable audio system beep */
   96 extern  struct consdev *cn_tab; /* console device */
   97 extern  struct consdev *gdb_tab;/* gdb debugger device */
   98 
   99 #define CONS_DRIVER(name, probe, init, initfini, term, getc, checkc, putc, dbctl)       \
  100         static struct consdev name##_consdev = {                        \
  101                 probe, init, initfini, term, getc, checkc, putc, dbctl  \
  102         };                                                              \
  103         DATA_SET(cons_set, name##_consdev)
  104 
  105 /* Other kernel entry points. */
  106 int     cncheckc (void);
  107 int     cngetc (void);
  108 void    cninit (void);
  109 void    cninit_finish (void);
  110 void    cndbctl (int);
  111 void    cnputc (int);
  112 
  113 #endif /* _KERNEL */
  114 
  115 #endif /* !_MACHINE_CONS_H_ */

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