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