[unix-history] / usr / src / sys / sys / dmap.h

/*	dmap.h	3.2	%G%	*/

/*
 * Definitions for the mapping of vitual swap
 * space to the physical swap area - the disk map.
 */

#define	NDMAP 		16	/* size of the swap area map */
#define	DMMIN 		16	/* the initial block size in clicks */
#define	DMMAX		1024	/* max block size alloc on drum = .5M byte */

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
struct	dmap zdmap;
#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 */
};
Commit	Line	Data
f86df66c	1	/* dmap.h 3.2 %G% */
863c693b BJ	2
	3	/*
	4	* Definitions for the mapping of vitual swap
	5	* space to the physical swap area - the disk map.
	6	*/
	7
	8	#define NDMAP 16 /* size of the swap area map */
	9	#define DMMIN 16 /* the initial block size in clicks */
	10	#define DMMAX 1024 /* max block size alloc on drum = .5M byte */
	11
	12	struct dmap
	13	{
	14	swblk_t dm_size; /* current size used by process */
	15	swblk_t dm_alloc; /* amount of physical swap space allocated */
	16	swblk_t dm_map[NDMAP]; /* first disk block number in each chunk */
	17	};
	18	#ifdef KERNEL
	19	struct dmap zdmap;
	20	#endif
	21
	22	/*
	23	* The following structure is that ``returned''
	24	* from a call to vstodb().
	25	*/
	26	struct dblock
	27	{
	28	swblk_t db_base; /* base of physical contig drum block */
	29	swblk_t db_size; /* size of block */
	30	};