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
58struct 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_ */