1 /* dmap.h 4.3 81/04/23 */ 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 32 /* the initial block size in clicks */ 10 #define DMMAX 1024 /* max block size alloc on drum = .5M byte */ 11 #define DMTEXT 1024 /* size of blocks of pure text = .5M byte */ 12 13 struct dmap 14 { 15 swblk_t dm_size; /* current size used by process */ 16 swblk_t dm_alloc; /* amount of physical swap space allocated */ 17 swblk_t dm_map[NDMAP]; /* first disk block number in each chunk */ 18 }; 19 #ifdef KERNEL 20 struct dmap zdmap; 21 #endif 22 23 /* 24 * The following structure is that ``returned'' 25 * from a call to vstodb(). 26 */ 27 struct dblock 28 { 29 swblk_t db_base; /* base of physical contig drum block */ 30 swblk_t db_size; /* size of block */ 31 }; 32