sys/arch/shark/include/devmap.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright 1997
   5  * Digital Equipment Corporation. All rights reserved.
   6  *
   7  * This software is furnished under license and may be used and
   8  * copied only in accordance with the following terms and conditions.
   9  * Subject to these conditions, you may download, copy, install,
  10  * use, modify and distribute this software in source and/or binary
  11  * form. No title or ownership is transferred hereby.
  12  *
  13  * 1) Any source code used, modified or distributed must reproduce
  14  *    and retain this copyright notice and list of conditions as
  15  *    they appear in the source file.
  16  *
  17  * 2) No right is granted to use any trade name, trademark, or logo of
  18  *    Digital Equipment Corporation. Neither the "Digital Equipment
  19  *    Corporation" name nor any trademark or logo of Digital Equipment
  20  *    Corporation may be used to endorse or promote products derived
  21  *    from this software without the prior written permission of
  22  *    Digital Equipment Corporation.
  23  *
  24  * 3) This software is provided "AS-IS" and any express or implied
  25  *    warranties, including but not limited to, any implied warranties
  26  *    of merchantability, fitness for a particular purpose, or
  27  *    non-infringement are disclaimed. In no event shall DIGITAL be
  28  *    liable for any damages whatsoever, and in particular, DIGITAL
  29  *    shall not be liable for special, indirect, consequential, or
  30  *    incidental damages or damages for lost profits, loss of
  31  *    revenue or loss of use, whether such damages arise in contract,
  32  *    negligence, tort, under statute, in equity, at law or otherwise,
  33  *    even if advised of the possibility of such damage.
  34  */
  35
  36 /*
  37 ** devmap.h -- device memory mapping definitions
  38 **
  39 **  <-----------------map size------------------------->
  40 **  <--internal offset--><--internal size-->
  41 **  |--------------------|------------------|----------|
  42 **  v                    v                  v          v
  43 **  page               device            device      page
  44 **  start              memory            memory       end
  45 ** (map offset)        start             end
  46 */
  47
  48 #ifndef _DEVMAP_H_
  49 #define _DEVMAP_H_
  50
  51 #include <sys/types.h>
  52
  53 #define MAP_INFO_UNKNOWN -1
  54 #define MAP_IOCTL 0
  55 #define MAP_MMAP  1
  56 #define MAP_I386_IOMAP 3
  57
  58 struct map_info {
  59     int method;      /* Mapping method - eg. IOCTL, MMAP, or I386_IOMAP */
  60     u_long size;     /* size of region, in bus-space units */
  61     union {
  62         long maxmapinfo[64/sizeof(long)];
  63         struct {
  64             int placeholder;       /* nothing needed */
  65         } map_info_ioctl;          /* used for ioctl method */
  66         struct {
  67             off_t map_offset;      /* offset to be given to mmap, page aligned */
  68             size_t map_size;       /* size to be given to mmap, page aligned */
  69             off_t internal_offset; /* internal offset in mapped rgn to data */
  70             size_t internal_size;  /* actual size of accessible region */
  71         } map_info_mmap;           /* used for mmap'd methods */
  72         struct {
  73             u_long start_port;
  74         } map_info_i386_iomap;
  75     } u;
  76 };
  77
  78 #endif /* _DEVMAP_H_ */