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Annotation of 43BSDTahoe/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    7.2 (Berkeley) 10/23/87
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * UDA50 registers and structures
        !            11:  */
        !            12: 
        !            13: /*
        !            14:  * Writing any value to udaip starts initialisation.  Reading from it
        !            15:  * when the UDA is running makes the UDA look through the command ring
        !            16:  * to find any new commands.  Reading udasa gives status; writing it
        !            17:  * during initialisation sets things up.
        !            18:  */
        !            19: struct udadevice {
        !            20:        u_short udaip;          /* initialisation and polling */
        !            21:        u_short udasa;          /* status and address */
        !            22: };
        !            23: 
        !            24: /*
        !            25:  * Bits in UDA status register during initialisation
        !            26:  */
        !            27: #define        UDA_ERR         0x8000  /* error */
        !            28: #define        UDA_STEP4       0x4000  /* step 4 has started */
        !            29: #define        UDA_STEP3       0x2000  /* step 3 has started */
        !            30: #define        UDA_STEP2       0x1000  /* step 2 has started */
        !            31: #define        UDA_STEP1       0x0800  /* step 1 has started */
        !            32: #define        UDA_NV          0x0400  /* no host settable interrupt vector */
        !            33: #define        UDA_QB          0x0200  /* controller supports Q22 bus */
        !            34: #define        UDA_DI          0x0100  /* controller implements diagnostics */
        !            35: #define        UDA_IE          0x0080  /* interrupt enable */
        !            36: #define        UDA_NCNRMASK    0x003f  /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */
        !            37: #define        UDA_IVECMASK    0x007f  /* in STEP2, bits 0-6 are interruptvec / 4 */
        !            38: #define        UDA_PI          0x0001  /* host requests adapter purge interrupts */
        !            39: 
        !            40: /*
        !            41:  * Bits in UDA status register after initialisation
        !            42:  */
        !            43: #define        UDA_GO          0x0001  /* run */
        !            44: 
        !            45: #define        UDASR_BITS \
        !            46: "\20\20ERR\17STEP4\16STEP3\15STEP2\14STEP1\13NV\12QB\11DI\10IE\1GO"
        !            47: 
        !            48: /*
        !            49:  * UDA Communications Area.  Note that this structure definition
        !            50:  * requires NRSP and NCMD to be defined already.
        !            51:  */
        !            52: struct udaca {
        !            53:        short   ca_xxx1;        /* unused */
        !            54:        char    ca_xxx2;        /* unused */
        !            55:        char    ca_bdp;         /* BDP to purge */
        !            56:        short   ca_cmdint;      /* command ring transition flag */
        !            57:        short   ca_rspint;      /* response ring transition flag */
        !            58:        long    ca_rspdsc[NRSP];/* response descriptors */
        !            59:        long    ca_cmddsc[NCMD];/* command descriptors */
        !            60: };
        !            61: 
        !            62: /*
        !            63:  * Simplified routines (e.g., uddump) reprogram the UDA50 for one command
        !            64:  * and one response at a time; uda1ca is like udaca except that it provides
        !            65:  * exactly one command and response descriptor.
        !            66:  */
        !            67: struct uda1ca {
        !            68:        short   ca_xxx1;
        !            69:        char    ca_xxx2;
        !            70:        char    ca_bdp;
        !            71:        short   ca_cmdint;
        !            72:        short   ca_rspint;
        !            73:        long    ca_rspdsc;
        !            74:        long    ca_cmddsc;
        !            75: };

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