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/dev/cons.h

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    1 /*      $NetBSD: cons.h,v 1.29 2022/10/03 19:12:29 riastradh 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. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  * from: Utah $Hdr: cons.h 1.6 92/01/21$
   37  *
   38  *      @(#)cons.h      8.1 (Berkeley) 6/10/93
   39  */
   40 
   41 #ifndef _SYS_DEV_CONS_H_
   42 #define _SYS_DEV_CONS_H_
   43 
   44 #include <sys/types.h>
   45 
   46 struct consdev {
   47         void    (*cn_probe)     /* probe hardware and fill in consdev info */
   48                    (struct consdev *);
   49         void    (*cn_init)      /* turn on as console */
   50                    (struct consdev *);
   51         int     (*cn_getc)      /* kernel getchar interface */
   52                    (dev_t);
   53         void    (*cn_putc)      /* kernel putchar interface */
   54                    (dev_t, int);
   55         void    (*cn_pollc)     /* turn on and off polling */
   56                    (dev_t, int);
   57         void    (*cn_bell)      /* ring bell */
   58                    (dev_t, u_int, u_int, u_int);
   59         void    (*cn_halt)      /* stop device */
   60                    (dev_t);
   61         void    (*cn_flush)     /* flush output */
   62                    (dev_t);
   63         dev_t   cn_dev;         /* major/minor of device */
   64         int     cn_pri;         /* pecking order; the higher the better */
   65 };
   66 
   67 /* values for cn_pri - reflect our policy for console selection */
   68 #define CN_DEAD         0       /* device doesn't exist */
   69 #define CN_NULL         1       /* noop console */
   70 #define CN_NORMAL       2       /* device exists but is nothing special */
   71 #define CN_INTERNAL     3       /* "internal" bit-mapped display */
   72 #define CN_REMOTE       4       /* serial interface with remote bit set */
   73 
   74 #ifdef _KERNEL
   75 
   76 extern  struct consdev constab[];
   77 extern  struct consdev *cn_tab;
   78 
   79 void    cn_set_tab(struct consdev *);
   80 
   81 void    cninit(void);
   82 int     cngetc(void);
   83 int     cngetsn(char *, int);
   84 void    cnputc(int);
   85 void    cnpollc(int);
   86 void    cnbell(u_int, u_int, u_int);
   87 void    cnflush(void);
   88 void    cnhalt(void);
   89 void    cnrint(void);
   90 void    nullcnprobe(struct consdev *);
   91 void    nullcninit(struct consdev *);
   92 void    nullcnpollc(dev_t, int);
   93 void    nullconsattach(int);
   94 
   95 /* console-specific types */
   96 #define dev_type_cnprobe(n)     void n(struct consdev *)
   97 #define dev_type_cninit(n)      void n(struct consdev *)
   98 #define dev_type_cngetc(n)      int n(dev_t)
   99 #define dev_type_cnputc(n)      void n(dev_t, int)
  100 #define dev_type_cnpollc(n)     void n(dev_t, int)
  101 #define dev_type_cnbell(n)      void n(dev_t, u_int, u_int, u_int)
  102 #define dev_type_cnhalt(n)      void n(dev_t)
  103 #define dev_type_cnflush(n)     void n(dev_t)
  104 
  105 #define dev_decl(n,t)           __CONCAT(dev_type_,t)(__CONCAT(n,t))
  106 #define dev_init(n,t)           __CONCAT(n,t)
  107 
  108 #define cons_decl(n) \
  109         dev_decl(n,cnprobe); dev_decl(n,cninit); dev_decl(n,cngetc); \
  110         dev_decl(n,cnputc); dev_decl(n,cnpollc); dev_decl(n,cnbell); \
  111         dev_decl(n,cnflush); dev_decl(n,cnhalt);
  112 
  113 #define cons_init(n) { \
  114         dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
  115         dev_init(n,cnputc), dev_init(n,cnpollc), NULL, NULL, NULL, \
  116         0, 0 }
  117 
  118 #define cons_init_bell(n) { \
  119         dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
  120         dev_init(n,cnputc), dev_init(n,cnpollc), dev_init(n,cnbell) }
  121 
  122 #define cons_init_halt(n) { \
  123         dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
  124         dev_init(n,cnputc), dev_init(n,cnpollc), 0,                  \
  125         dev_init(n,cnhalt) }
  126 
  127 #endif
  128 
  129 #endif /* _SYS_DEV_CONS_H_ */

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