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Annotation of Net2/arch/vax/if/if_dmc.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)if_dmc.h    7.5 (Berkeley) 6/28/90
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * DMC-11 Interface
        !            38:  */
        !            39: 
        !            40: struct dmcdevice {
        !            41:         char    bsel0;
        !            42:        char    bsel1;
        !            43:        char    bsel2;
        !            44:        char    bsel3;
        !            45:        short   sel4;
        !            46:        short   sel6;
        !            47: };
        !            48: 
        !            49: /*
        !            50:  * dmc software packet encapsulation.  This allows the dmc
        !            51:  * link to be multiplexed among several protocols.
        !            52:  * The first eight bytes of the dmc header are garbage,
        !            53:  * since on a vax the uba has been known to mung these
        !            54:  * bytes.  The next two bytes encapsulate packet type.
        !            55:  */
        !            56: struct dmc_header {
        !            57:        char    dmc_buf[8];     /* space for uba on vax */
        !            58:        short   dmc_type;       /* encapsulate packet type */
        !            59: };
        !            60: 
        !            61: /* packet types */
        !            62: #define        DMC_IPTYPE      1
        !            63: #define        DMC_TRAILER     2
        !            64: #define        DMC_NTRAILER    16
        !            65: 
        !            66: /*
        !            67:  * DMCMTU includes space for data (1024) + 
        !            68:  * protocol header (256) + trailer descriptor (4).
        !            69:  * The software link encapsulation header (dmc_header)
        !            70:  * is handled separately.
        !            71:        #define DMCMTU  1284
        !            72:  */
        !            73: #define DMCMTU  1500
        !            74: 
        !            75: #define        RDYSCAN 16      /* loop delay for RDYI after RQI */
        !            76: 
        !            77: /* defines for bsel0 */
        !            78: #define        DMC_BACCI       0
        !            79: #define        DMC_CNTLI       1
        !            80: #define        DMC_PERR        2
        !            81: #define        DMC_BASEI       3
        !            82: #define        DMC_WRITE       0               /* transmit block */
        !            83: #define        DMC_READ        4               /* read block */
        !            84: #define        DMC_RQI         0040            /* port request bit */
        !            85: #define        DMC_IEI         0100            /* enable input interrupts */
        !            86: #define        DMC_RDYI        0200            /* port ready */
        !            87: #define        DMC0BITS        "\10\10RDI\7IEI\6RQI"
        !            88: 
        !            89: /* defines for bsel1 */
        !            90: #define        DMC_MCLR        0100            /* DMC11 Master Clear */
        !            91: #define        DMC_RUN         0200            /* clock running */
        !            92: #define        DMC1BITS        "\10\10RUN\7MCLR"
        !            93: 
        !            94: /* defines for bsel2 */
        !            95: #define        DMC_BACCO       0
        !            96: #define        DMC_CNTLO       1
        !            97: #define        DMC_OUX         0               /* transmit block */
        !            98: #define        DMC_OUR         4               /* read block */
        !            99: #define        DMC_IEO         0100            /* enable output interrupts */
        !           100: #define        DMC_RDYO        0200            /* port available */
        !           101: #define        DMC2BITS        "\10\10RDO\7IEO"
        !           102: 
        !           103: /* defines for CNTLI mode */
        !           104: #define        DMC_HDPLX       02000           /* half duplex DDCMP operation */
        !           105: #define        DMC_SEC         04000           /* half duplex secondary station */
        !           106: #define        DMC_MAINT       00400           /* enter maintenance mode */
        !           107: 
        !           108: /* defines for BACCI/O and BASEI mode */
        !           109: #define        DMC_XMEM        0140000         /* xmem bit position */
        !           110: #define        DMC_CCOUNT      0037777         /* character count mask */
        !           111: #define        DMC_RESUME      0002000         /* resume (BASEI only) */
        !           112: 
        !           113: /* defines for CNTLO */
        !           114: #define        DMC_CNTMASK     01777
        !           115: 
        !           116: #define        DMC_DATACK      01
        !           117: #define        DMC_TIMEOUT     02
        !           118: #define        DMC_NOBUFS      04
        !           119: #define        DMC_MAINTREC    010
        !           120: #define        DMC_LOSTDATA    020
        !           121: #define        DMC_DISCONN     0100
        !           122: #define        DMC_START       0200
        !           123: #define        DMC_NEXMEM      0400
        !           124: #define        DMC_ERROR       01000
        !           125: 
        !           126: #define        DMC_FATAL (DMC_ERROR|DMC_NEXMEM|DMC_START|DMC_LOSTDATA|DMC_MAINTREC)
        !           127: #define        CNTLO_BITS      \
        !           128:    "\10\12ERROR\11NEXMEM\10START\7DISC\5LSTDATA\4MAINT\3NOBUF\2TIMEO\1DATACK"

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