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Annotation of researchv10dc/lsys/sys/up.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * UNIBUS SMD disk data structures
                      3:  * one updisk per drive
                      4:  * one scctl per controller
                      5:  */
                      6: 
                      7: struct updisk {
                      8:        struct scctl *ctl;
                      9:        char flags;
                     10:        char type;              /* type of drive; magic code */
                     11:        char unit;              /* physical unit number on this controller */
                     12:        struct buf *actf;       /* list of buffers waiting to be xfered */
                     13:        struct buf *actl;
                     14:        struct updisk *next;
                     15: };
                     16: 
                     17: #define        NSCUP   8       /* max units per controller */
                     18: 
                     19: struct scctl {
                     20:        struct updevice *addr;
                     21:        struct updisk *actf;    /* list of active drives */
                     22:        struct updisk *actl;
                     23:        char flags;
                     24:        char ubno;              /* unibus number -- only for mapping */
                     25:        char errcnt;
                     26:        char recal;             /* current place in retry machine */
                     27:        char softas;            /* non-transfer attention required */
                     28:        struct updisk *drives[NSCUP];   /* back-pointers to drives */
                     29: };
                     30: 
                     31: /*
                     32:  * device size
                     33:  * here so updump can get it
                     34:  */
                     35: struct upst {
                     36:        char    nsect;  /* sectors per track */
                     37:        char    ntrak;  /* tracks per cylinder */
                     38:        char    sdist;  /* sectors twixt search and io */
                     39:        char    rdist;  /* sectors close enough not to search */
                     40:        short   nspc;   /* sectors per cylinder */
                     41:        short   ncyl;   /* cylinders per pack */
                     42:        struct  size *sizes;
                     43: };

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