xnu-792.12.6.tar.gz

[apple/xnu.git] / bsd / sys / dmap.h

/*
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/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 *	@(#)dmap.h	8.2 (Berkeley) 1/4/94
 */

#ifndef _SYS_DMAP_H_
#define	_SYS_DMAP_H_

#include <sys/appleapiopts.h>

#ifdef __APPLE_API_OBSOLETE
/*
 * Definitions for the mapping of vitual swap space to the physical swap
 * area - the disk map.
 */
#define	NDMAP	38		/* size of the swap area map */

struct dmap {
	swblk_t dm_size;	/* current size used by process */
	swblk_t dm_alloc;	/* amount of physical swap space allocated */
	swblk_t dm_map[NDMAP];	/* first disk block number in each chunk */
};
#ifdef KERNEL
extern struct dmap zdmap;
extern int dmmin, dmmax, dmtext;
#endif

/* The following structure is that ``returned'' from a call to vstodb(). */
struct dblock {
	swblk_t db_base;	/* base of physical contig drum block */
	swblk_t db_size;	/* size of block */
};

#endif /* __APPLE_API_OBSOLETE */

#endif	/* !_SYS_DMAP_H_ */