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Annotation of 43BSD/sys/vaxuba/udareg.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1986 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)udareg.h    7.1 (Berkeley) 6/5/86
                      7:  */
                      8: 
                      9: /*
                     10:  * UDA-50 registers and structures
                     11:  */
                     12: 
                     13: struct udadevice {
                     14:        short   udaip;          /* initialization and polling */
                     15:        short   udasa;          /* status and address */
                     16: };
                     17: 
                     18: #define        UDA_ERR         0100000 /* error bit */
                     19: #define        UDA_STEP4       0040000 /* step 4 has started */
                     20: #define        UDA_STEP3       0020000 /* step 3 has started */
                     21: #define        UDA_STEP2       0010000 /* step 2 has started */
                     22: #define        UDA_STEP1       0004000 /* step 1 has started */
                     23: #define        UDA_NV          0002000 /* no host settable interrupt vector */
                     24: #define        UDA_QB          0001000 /* controller supports Q22 bus */
                     25: #define        UDA_DI          0000400 /* controller implements diagnostics */
                     26: #define        UDA_IE          0000200 /* interrupt enable */
                     27: #define        UDA_PI          0000001 /* host requests adapter purge interrupts */
                     28: #define        UDA_GO          0000001 /* start operation, after init */
                     29: 
                     30: 
                     31: /*
                     32:  * UDA Communications Area
                     33:  */
                     34: 
                     35: struct udaca {
                     36:        short   ca_xxx1;        /* unused */
                     37:        char    ca_xxx2;        /* unused */
                     38:        char    ca_bdp;         /* BDP to purge */
                     39:        short   ca_cmdint;      /* command queue transition interrupt flag */
                     40:        short   ca_rspint;      /* response queue transition interrupt flag */
                     41:        long    ca_rspdsc[NRSP];/* response descriptors */
                     42:        long    ca_cmddsc[NCMD];/* command descriptors */
                     43: };
                     44: 
                     45: #define        ca_ringbase     ca_rspdsc[0]
                     46: 
                     47: #define        UDA_OWN 0x80000000      /* UDA owns this descriptor */
                     48: #define        UDA_INT 0x40000000      /* allow interrupt on ring transition */
                     49: 
                     50: /*
                     51:  * MSCP packet info
                     52:  */
                     53: struct mscp_header {
                     54:        short   uda_msglen;     /* length of MSCP packet */
                     55:        char    uda_credits;    /* low 4 bits: credits, high 4 bits: msgtype */
                     56:        char    uda_vcid;       /* virtual circuit id */
                     57: };

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