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

1.1       root        1: /*
                      2:  * UDA-50 registers and structures
                      3:  */
                      4: 
                      5: struct udadevice {
                      6:        short   udaip;          /* initialization and polling */
                      7:        short   udasa;          /* status and address */
                      8: };
                      9: 
                     10: #define        UDA_ERR         0100000 /* error bit */
                     11: #define        UDA_STEP4       0040000 /* step 4 has started */
                     12: #define        UDA_STEP3       0020000 /* step 3 has started */
                     13: #define        UDA_STEP2       0010000 /* step 2 has started */
                     14: #define        UDA_STEP1       0004000 /* step 1 has started */
                     15: #define        UDA_NV          0002000 /* no host settable interrupt vector */
                     16: #define        UDA_QB          0001000 /* controller supports Q22 bus */
                     17: #define        UDA_DI          0000400 /* controller implements diagnostics */
                     18: #define        UDA_IE          0000200 /* interrupt enable */
                     19: #define        UDA_PI          0000001 /* host requests adapter purge interrupts */
                     20: #define UDA_LF         0000002 /* host requests last fail packet */
                     21: #define        UDA_GO          0000001 /* start operation, after init */
                     22: 
                     23: /*
                     24:  * UDA Communications Area
                     25:  */
                     26: 
                     27: struct udaca {
                     28:        short   ca_xxx1;        /* unused */
                     29:        char    ca_xxx2;        /* unused */
                     30:        char    ca_bdp;         /* BDP to purge */
                     31:        short   ca_cmdint;      /* command queue transition interrupt flag */
                     32:        short   ca_rspint;      /* response queue transition interrupt flag */
                     33:        long    ca_rspdsc[NRSP];/* response descriptors */
                     34:        long    ca_cmddsc[NCMD];/* command descriptors */
                     35: };
                     36: 
                     37: #define        ca_ringbase     ca_rspdsc[0]
                     38: 
                     39: #define        UDA_OWN 0x80000000      /* UDA owns this descriptor */
                     40: #define        UDA_INT 0x40000000      /* allow interrupt on ring transition */
                     41: 
                     42: /*
                     43:  * MSCP packet info (message envelope)
                     44:  */
                     45: struct mscp_header {
                     46:        short   uda_msglen;     /* length of MSCP packet */
                     47:        char    uda_credits;    /* low 4 bits: credits, high 4 bits: msgtype */
                     48:                        /* msgtypes: 0-seq, 1-datagra, 2-credits */
                     49:        char    uda_vcid;       /* virtual circuit id */
                     50: };

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