79 lines
3.0 KiB
C
79 lines
3.0 KiB
C
/* $NetBSD: devmap.h,v 1.2 1998/07/08 07:56:13 thorpej Exp $ */
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/*
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* Copyright 1997
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* Digital Equipment Corporation. All rights reserved.
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*
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* This software is furnished under license and may be used and
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* copied only in accordance with the following terms and conditions.
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* Subject to these conditions, you may download, copy, install,
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* use, modify and distribute this software in source and/or binary
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* form. No title or ownership is transferred hereby.
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*
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* 1) Any source code used, modified or distributed must reproduce
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* and retain this copyright notice and list of conditions as
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* they appear in the source file.
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*
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* 2) No right is granted to use any trade name, trademark, or logo of
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* Digital Equipment Corporation. Neither the "Digital Equipment
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* Corporation" name nor any trademark or logo of Digital Equipment
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* Corporation may be used to endorse or promote products derived
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* from this software without the prior written permission of
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* Digital Equipment Corporation.
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*
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* 3) This software is provided "AS-IS" and any express or implied
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* warranties, including but not limited to, any implied warranties
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* of merchantability, fitness for a particular purpose, or
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* non-infringement are disclaimed. In no event shall DIGITAL be
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* liable for any damages whatsoever, and in particular, DIGITAL
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* shall not be liable for special, indirect, consequential, or
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* incidental damages or damages for lost profits, loss of
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* revenue or loss of use, whether such damages arise in contract,
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* negligence, tort, under statute, in equity, at law or otherwise,
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* even if advised of the possibility of such damage.
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*/
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/*
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** devmap.h -- device memory mapping definitions
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**
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** <-----------------map size------------------------->
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** <--internal offset--><--internal size-->
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** |--------------------|------------------|----------|
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** v v v v
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** page device device page
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** start memory memory end
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** (map offset) start end
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*/
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#ifndef _DEVMAP_H_
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#define _DEVMAP_H_
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#include <sys/types.h>
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#define MAP_INFO_UNKNOWN -1
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#define MAP_IOCTL 0
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#define MAP_MMAP 1
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#define MAP_I386_IOMAP 3
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struct map_info {
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int method; /* Mapping method - eg. IOCTL, MMAP, or I386_IOMAP */
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u_long size; /* size of region, in bus-space units */
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union {
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long maxmapinfo[64/sizeof(long)];
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struct {
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int placeholder; /* nothing needed */
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} map_info_ioctl; /* used for ioctl method */
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struct {
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off_t map_offset; /* offset to be given to mmap, page aligned */
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size_t map_size; /* size to be given to mmap, page aligned */
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off_t internal_offset; /* internal offset in mapped rgn to data */
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size_t internal_size; /* actual size of accessible region */
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} map_info_mmap; /* used for mmap'd methods */
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struct {
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u_long start_port;
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} map_info_i386_iomap;
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} u;
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};
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#endif /* _DEVMAP_H_ */
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