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Annotation of researchv9/sys.vax/h/dmap.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Definitions for the mapping of vitual swap
                      3:  * space to the physical swap area - the disk map.
                      4:  */
                      5: 
                      6: #ifdef BIGMEM
                      7: #define        NDMAP           64      /* size of the swap area map */
                      8: #else
                      9: #define        NDMAP           32      /* size of the swap area map */
                     10: #endif
                     11: #define        DMMIN           32      /* the initial block size in clicks */
                     12: #define        DMMAX           1024    /* max block size alloc on drum = .5M byte */
                     13: #define        DMTEXT          1024    /* size of blocks of pure text = .5M byte */
                     14: 
                     15: struct dmap
                     16: {
                     17:        swblk_t dm_size;        /* current size used by process */
                     18:        swblk_t dm_alloc;       /* amount of physical swap space allocated */
                     19:        swblk_t dm_map[NDMAP];  /* first disk block number in each chunk */
                     20: };
                     21: #ifdef KERNEL
                     22: struct dmap zdmap;
                     23: #endif
                     24: 
                     25: /*
                     26:  * The following structure is that ``returned''
                     27:  * from a call to vstodb().
                     28:  */
                     29: struct dblock
                     30: {
                     31:        swblk_t db_base;        /* base of physical contig drum block */
                     32:        swblk_t db_size;        /* size of block */
                     33: };

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