FreeBSD/Linux Kernel Cross Reference
sys/device/conf.h

     /* 
      * Mach Operating System
      * Copyright (c) 1991,1990,1989 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     * HISTORY
     * $Log:        conf.h,v $
     * Revision 2.6  93/05/17  16:23:23  rvb
     *      Since map's return vm_offset_t's, we need a "nomap()" that does
     *      so also, to keep the type system happy.
     *      [93/05/17            rvb]
     * 
     * Revision 2.5  93/02/05  07:50:17  danner
     *      The map function really returns a phys address.
     *      [93/02/04  01:54:45  af]
     * 
     * Revision 2.4  91/08/28  11:11:12  jsb
     *      Change block size entry to general device info entry.
     *      [91/08/12  17:24:37  dlb]
     * 
     *      Add block size entry.  Only needed for block_io devices.
     *      [91/08/05  17:28:42  dlb]
     * 
     * Revision 2.3  91/05/14  15:39:57  mrt
     *      Correcting copyright
     * 
     * Revision 2.2  91/02/05  17:08:10  mrt
     *      Changed to new Mach copyright
     *      [91/01/31  17:26:55  mrt]
     * 
     * Revision 2.1  89/08/03  15:26:07  rwd
     * Created.
     * 
     * 12-May-89  David Golub (dbg) at Carnegie-Mellon University
     *      Added indirect devices.
     *
     * 12-Apr-89  David Golub (dbg) at Carnegie-Mellon University
     *      Added port_death routine.
     *
     * 24-Aug-88  David Golub (dbg) at Carnegie-Mellon University
     *      Created.
     *
     */
    /*
     *      Author: David B. Golub, Carnegie Mellon University
     *      Date:   8/88
     */
    
    #ifndef _CONF_
    #define _CONF_
    
    /*
     * Operations list for major device types.
     */
    struct dev_ops {
            char *          d_name;         /* name for major device */
            int             (*d_open)();    /* open device */
            int             (*d_close)();   /* close device */
            int             (*d_read)();    /* read */
            int             (*d_write)();   /* write */
            int             (*d_getstat)(); /* get status/control */
            int             (*d_setstat)(); /* set status/control */
            vm_offset_t     (*d_mmap)();    /* map memory */
            int             (*d_async_in)();/* asynchronous input setup */
            int             (*d_reset)();   /* reset device */
            int             (*d_port_death)();
                                            /* clean up reply ports */
            int             d_subdev;       /* number of sub-devices per
                                               unit */
            int             (*d_dev_info)(); /* driver info for kernel */
    };
    typedef struct dev_ops *dev_ops_t;
    
    /*
     * Routines for null entries.
     */
    extern int      nulldev();              /* no operation - OK */
    extern int      nodev();                /* no operation - error */
   extern vm_offset_t nomap();             /* no operation - error */
   
   /*
    * Flavor constants for d_dev_info routine
    */
   #define D_INFO_BLOCK_SIZE       1
   
   /*
    * Head of list of attached devices
    */
   extern struct dev_ops   dev_name_list[];
   extern int              dev_name_count;
   
   /*
    * Macro to search device list
    */
   #define dev_search(dp)  \
           for (dp = dev_name_list; \
                dp < &dev_name_list[dev_name_count]; \
                dp++)
   
   /*
    * Indirection vectors for certain devices.
    */
   struct dev_indirect {
           char *          d_name;         /* name for device */
           dev_ops_t       d_ops;          /* operations (major device) */
           int             d_unit;         /* and unit number */
   };
   typedef struct dev_indirect     *dev_indirect_t;
   
   /*
    * List of indirect devices.
    */
   extern struct dev_indirect      dev_indirect_list[];
   extern int                      dev_indirect_count;
   
   /*
    * Macro to search indirect list
    */
   #define dev_indirect_search(di) \
           for (di = dev_indirect_list; \
                di < &dev_indirect_list[dev_indirect_count]; \
                di++)
   
   /*
    * Exported routine to set indirection.
    */
   extern void     dev_set_indirect();
   
   #endif  _CONF_

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