Home | History | Annotate | Line # | Download | only in include 
      1 /*	$NetBSD: devmap.h,v 1.1 2002/02/10 01:57:13 thorpej Exp $	*/
      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_ */
     79