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