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Annotation of 42BSD/sys/vaxif/if_unreg.h, revision 1.1.1.1

1.1       root        1: /*     if_unreg.h      6.1     83/07/29        */
                      2: 
                      3: /*
                      4:  * Device registers and bit meanings
                      5:  */
                      6: 
                      7: struct undevice {
                      8:        short   wcr;    /* word count */
                      9:        short   bar;    /* bus address */
                     10:        short   csr;    /* control & status (also error & info) */
                     11:        short   dar;    /* input and output data register */
                     12: };
                     13: 
                     14: /* CSR bits */
                     15: #define GO     0000001
                     16: #define FCN1   0000002         /* three function bits */
                     17: #define FCN2   0000004 
                     18: #define FCN3   0000010 
                     19: #define XBA    0000060         /* extended bus address (16&17) */
                     20: #define IE     0000100         /* interrupt enable */
                     21: #define RDY    0000200         /* ready */
                     22: #define CYCL   0000400         /* cycle */
                     23: #define        STATC   0001000         /* Status bit C */
                     24: #define        STATB   0002000         /* Status bit B */
                     25: #define        STATA   0004000         /* Status bit A */
                     26: #define MNT    0010000         /* maintenance */
                     27: #define ATTN   0020000         /* attention (from device) */
                     28: #define NEX    0040000         /* non-existent memory */
                     29: #define ERR    0100000
                     30: #define XADD   4
                     31: 
                     32: #define        UNBITS  "\10\20ERR\17NEX\16ATTN\15MNT\14STATA\13STATB\12STATC\
                     33: \11CYCL\10RDY\7IE\6XBA17\5XBA16\4FCN3\3FCN2\2FCN1\1GO"
                     34: 
                     35: /* EIR bits */
                     36: #define RF     0000001         /* register flag 1 - verifies EIR */
                     37: #define NBST   0000400         /* N - cycle burst */
                     38: #define BDLT   0001000         /* burst data late */
                     39: #define PERR   0002000         /* parity error */
                     40: #define ACLO   0004000         /* power fail */
                     41: #define MCYC   0010000         /* multicycle request */
                     42: #define ATTN   0020000         /* attention (from device) */
                     43: #define NEX    0040000         /* non-existent memory */
                     44: #define ERR    0100000
                     45: 
                     46: /* Network interface commands */
                     47: #define        UNRESET 0
                     48: #define        UNRDHDR FCN1
                     49: #define        UNOUT   FCN2
                     50: #define        UNRDDG  (FCN2|FCN1)
                     51: #define        UNFLUSH FCN3
                     52: #define        UNIDLE  (FCN3|FCN2)
                     53: 
                     54: /* Extended status bits (in dar) */
                     55: #define RESETACK       1       /* Reset cmd acknowledged */

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