sys/sys/dmap.h

   1 /*-
   2  * Copyright (c) 1982, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)dmap.h      8.2 (Berkeley) 1/4/94
  34  * $FreeBSD: src/sys/sys/dmap.h,v 1.7 1999/12/29 04:24:40 peter Exp $
  35  * $DragonFly: src/sys/sys/dmap.h,v 1.4 2008/08/10 22:09:51 dillon Exp $
  36  */
  37
  38 #ifndef _SYS_DMAP_H_
  39 #define _SYS_DMAP_H_
  40
  41 #ifndef _SYS_TYPES_H_
  42 #include <sys/types.h>
  43 #endif
  44 #ifndef _SYS_BLIST_H_
  45 #include <sys/blist.h>
  46 #endif
  47
  48 /*
  49  * Definitions for the mapping of vitual swap space to the physical swap
  50  * area - the disk map.
  51  */
  52 #define NDMAP   38              /* size of the swap area map */
  53
  54 struct dmap {
  55         swblk_t dm_size;        /* current size used by process */
  56         swblk_t dm_alloc;       /* amount of physical swap space allocated */
  57         swblk_t dm_map[NDMAP];  /* first disk block number in each chunk */
  58 };
  59 #ifdef _KERNEL
  60 extern struct dmap zdmap;
  61 extern int dmmin, dmmax, dmtext;
  62 #endif
  63
  64 /* The following structure is that ``returned'' from a call to vstodb(). */
  65 struct dblock {
  66         swblk_t db_base;        /* base of physical contig drum block */
  67         swblk_t db_size;        /* size of block */
  68 };
  69 #endif  /* !_SYS_DMAP_H_ */