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