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Annotation of 43BSDTahoe/sys/vaxif/if_dmc.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:  *     @(#)if_dmc.h    7.3 (Berkeley) 5/26/88
                      7:  */
                      8: 
                      9: /*
                     10:  * DMC-11 Interface
                     11:  */
                     12: 
                     13: struct dmcdevice {
                     14:         char    bsel0;
                     15:        char    bsel1;
                     16:        char    bsel2;
                     17:        char    bsel3;
                     18:        short   sel4;
                     19:        short   sel6;
                     20: };
                     21: 
                     22: /*
                     23:  * dmc software packet encapsulation.  This allows the dmc
                     24:  * link to be multiplexed among several protocols.
                     25:  * The first eight bytes of the dmc header are garbage,
                     26:  * since on a vax the uba has been known to mung these
                     27:  * bytes.  The next two bytes encapsulate packet type.
                     28:  */
                     29: struct dmc_header {
                     30:        char    dmc_buf[8];     /* space for uba on vax */
                     31:        short   dmc_type;       /* encapsulate packet type */
                     32: };
                     33: 
                     34: /* packet types */
                     35: #define        DMC_IPTYPE      1
                     36: #define        DMC_TRAILER     2
                     37: #define        DMC_NTRAILER    16
                     38: 
                     39: /*
                     40:  * DMCMTU includes space for data (1024) + 
                     41:  * protocol header (256) + trailer descriptor (4).
                     42:  * The software link encapsulation header (dmc_header)
                     43:  * is handled separately.
                     44:        #define DMCMTU  1284
                     45:  */
                     46: #define DMCMTU  1500
                     47: 
                     48: #define        RDYSCAN 16      /* loop delay for RDYI after RQI */
                     49: 
                     50: /* defines for bsel0 */
                     51: #define        DMC_BACCI       0
                     52: #define        DMC_CNTLI       1
                     53: #define        DMC_PERR        2
                     54: #define        DMC_BASEI       3
                     55: #define        DMC_WRITE       0               /* transmit block */
                     56: #define        DMC_READ        4               /* read block */
                     57: #define        DMC_RQI         0040            /* port request bit */
                     58: #define        DMC_IEI         0100            /* enable input interrupts */
                     59: #define        DMC_RDYI        0200            /* port ready */
                     60: #define        DMC0BITS        "\10\10RDI\7IEI\6RQI"
                     61: 
                     62: /* defines for bsel1 */
                     63: #define        DMC_MCLR        0100            /* DMC11 Master Clear */
                     64: #define        DMC_RUN         0200            /* clock running */
                     65: #define        DMC1BITS        "\10\10RUN\7MCLR"
                     66: 
                     67: /* defines for bsel2 */
                     68: #define        DMC_BACCO       0
                     69: #define        DMC_CNTLO       1
                     70: #define        DMC_OUX         0               /* transmit block */
                     71: #define        DMC_OUR         4               /* read block */
                     72: #define        DMC_IEO         0100            /* enable output interrupts */
                     73: #define        DMC_RDYO        0200            /* port available */
                     74: #define        DMC2BITS        "\10\10RDO\7IEO"
                     75: 
                     76: /* defines for CNTLI mode */
                     77: #define        DMC_HDPLX       02000           /* half duplex DDCMP operation */
                     78: #define        DMC_SEC         04000           /* half duplex secondary station */
                     79: #define        DMC_MAINT       00400           /* enter maintenance mode */
                     80: 
                     81: /* defines for BACCI/O and BASEI mode */
                     82: #define        DMC_XMEM        0140000         /* xmem bit position */
                     83: #define        DMC_CCOUNT      0037777         /* character count mask */
                     84: #define        DMC_RESUME      0002000         /* resume (BASEI only) */
                     85: 
                     86: /* defines for CNTLO */
                     87: #define        DMC_CNTMASK     01777
                     88: 
                     89: #define        DMC_DATACK      01
                     90: #define        DMC_TIMEOUT     02
                     91: #define        DMC_NOBUFS      04
                     92: #define        DMC_MAINTREC    010
                     93: #define        DMC_LOSTDATA    020
                     94: #define        DMC_DISCONN     0100
                     95: #define        DMC_START       0200
                     96: #define        DMC_NEXMEM      0400
                     97: #define        DMC_ERROR       01000
                     98: 
                     99: #define        DMC_FATAL (DMC_ERROR|DMC_NEXMEM|DMC_START|DMC_LOSTDATA|DMC_MAINTREC)
                    100: #define        CNTLO_BITS      \
                    101:    "\10\12ERROR\11NEXMEM\10START\7DISC\5LSTDATA\4MAINT\3NOBUF\2TIMEO\1DATACK"

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