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

     /*      $NetBSD: cons.h,v 1.22 2003/10/17 18:16:43 cdi Exp $    */
     
     /*
      * Copyright (c) 1990, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * the Systems Programming Group of the University of Utah Computer
      * Science Department.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * from: Utah $Hdr: cons.h 1.6 92/01/21$
     *
     *      @(#)cons.h      8.1 (Berkeley) 6/10/93
     */
    
    /*
     * Copyright (c) 1988 University of Utah.
     *
     * This code is derived from software contributed to Berkeley by
     * the Systems Programming Group of the University of Utah Computer
     * Science Department.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * from: Utah $Hdr: cons.h 1.6 92/01/21$
     *
     *      @(#)cons.h      8.1 (Berkeley) 6/10/93
     */
    
    #ifndef _SYS_DEV_CONS_H_
    #define _SYS_DEV_CONS_H_
    
    struct consdev {
            void    (*cn_probe)     /* probe hardware and fill in consdev info */
                        __P((struct consdev *));
            void    (*cn_init)      /* turn on as console */
                        __P((struct consdev *));
            int     (*cn_getc)      /* kernel getchar interface */
                        __P((dev_t));
            void    (*cn_putc)      /* kernel putchar interface */
                        __P((dev_t, int));
            void    (*cn_pollc)     /* turn on and off polling */
                        __P((dev_t, int));
            void    (*cn_bell)      /* ring bell */
                        __P((dev_t, u_int, u_int, u_int));
            void    (*cn_halt)      /* stop device */
                        __P((dev_t));
            void    (*cn_flush)     /* flush output */
                        __P((dev_t));
           dev_t   cn_dev;         /* major/minor of device */
           int     cn_pri;         /* pecking order; the higher the better */
   };
   
   /* values for cn_pri - reflect our policy for console selection */
   #define CN_DEAD         0       /* device doesn't exist */
   #define CN_NULL         1       /* noop console */
   #define CN_NORMAL       2       /* device exists but is nothing special */
   #define CN_INTERNAL     3       /* "internal" bit-mapped display */
   #define CN_REMOTE       4       /* serial interface with remote bit set */
   
   #ifdef _KERNEL
   
   extern  struct consdev constab[];
   extern  struct consdev *cn_tab;
   
   void    cninit __P((void));
   int     cngetc __P((void));
   int     cngetsn __P((char *, int));
   void    cnputc __P((int));
   void    cnpollc __P((int));
   void    cnbell __P((u_int, u_int, u_int));
   void    cnflush __P((void));
   void    cnhalt __P((void));
   void    cnrint __P((void));
   void    nullcnprobe __P((struct consdev *));
   void    nullcninit __P((struct consdev *));
   void    nullcnpollc __P((dev_t, int));
   void    nullconsattach __P((int));
   
   /* console-specific types */
   #define dev_type_cnprobe(n)     void n __P((struct consdev *))
   #define dev_type_cninit(n)      void n __P((struct consdev *))
   #define dev_type_cngetc(n)      int n __P((dev_t))
   #define dev_type_cnputc(n)      void n __P((dev_t, int))
   #define dev_type_cnpollc(n)     void n __P((dev_t, int))
   #define dev_type_cnbell(n)      void n __P((dev_t, u_int, u_int, u_int));
   #define dev_type_cnhalt(n)      void n __P((dev_t))
   #define dev_type_cnflush(n)     void n __P((dev_t))
   
   #define dev_decl(n,t)           __CONCAT(dev_type_,t)(__CONCAT(n,t))
   #define dev_init(n,t)           __CONCAT(n,t)
   
   #define cons_decl(n) \
           dev_decl(n,cnprobe); dev_decl(n,cninit); dev_decl(n,cngetc); \
           dev_decl(n,cnputc); dev_decl(n,cnpollc); dev_decl(n,cnbell); \
           dev_decl(n,cnflush); dev_decl(n,cnhalt);
   
   #define cons_init(n) { \
           dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
           dev_init(n,cnputc), dev_init(n,cnpollc) }
   
   #define cons_init_bell(n) { \
           dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
           dev_init(n,cnputc), dev_init(n,cnpollc), dev_init(n,cnbell) }
   
   #define cons_init_halt(n) { \
           dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
           dev_init(n,cnputc), dev_init(n,cnpollc), 0,                  \
           dev_init(n,cnhalt) }
   
   #endif
   
   #endif /* _SYS_DEV_CONS_H_ */

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