1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)if_dmc.h 7.5 (Berkeley) 06/28/90 8 */ 9 10 /* 11 * DMC-11 Interface 12 */ 13 14 struct dmcdevice { 15 char bsel0; 16 char bsel1; 17 char bsel2; 18 char bsel3; 19 short sel4; 20 short sel6; 21 }; 22 23 /* 24 * dmc software packet encapsulation. This allows the dmc 25 * link to be multiplexed among several protocols. 26 * The first eight bytes of the dmc header are garbage, 27 * since on a vax the uba has been known to mung these 28 * bytes. The next two bytes encapsulate packet type. 29 */ 30 struct dmc_header { 31 char dmc_buf[8]; /* space for uba on vax */ 32 short dmc_type; /* encapsulate packet type */ 33 }; 34 35 /* packet types */ 36 #define DMC_IPTYPE 1 37 #define DMC_TRAILER 2 38 #define DMC_NTRAILER 16 39 40 /* 41 * DMCMTU includes space for data (1024) + 42 * protocol header (256) + trailer descriptor (4). 43 * The software link encapsulation header (dmc_header) 44 * is handled separately. 45 #define DMCMTU 1284 46 */ 47 #define DMCMTU 1500 48 49 #define RDYSCAN 16 /* loop delay for RDYI after RQI */ 50 51 /* defines for bsel0 */ 52 #define DMC_BACCI 0 53 #define DMC_CNTLI 1 54 #define DMC_PERR 2 55 #define DMC_BASEI 3 56 #define DMC_WRITE 0 /* transmit block */ 57 #define DMC_READ 4 /* read block */ 58 #define DMC_RQI 0040 /* port request bit */ 59 #define DMC_IEI 0100 /* enable input interrupts */ 60 #define DMC_RDYI 0200 /* port ready */ 61 #define DMC0BITS "\10\10RDI\7IEI\6RQI" 62 63 /* defines for bsel1 */ 64 #define DMC_MCLR 0100 /* DMC11 Master Clear */ 65 #define DMC_RUN 0200 /* clock running */ 66 #define DMC1BITS "\10\10RUN\7MCLR" 67 68 /* defines for bsel2 */ 69 #define DMC_BACCO 0 70 #define DMC_CNTLO 1 71 #define DMC_OUX 0 /* transmit block */ 72 #define DMC_OUR 4 /* read block */ 73 #define DMC_IEO 0100 /* enable output interrupts */ 74 #define DMC_RDYO 0200 /* port available */ 75 #define DMC2BITS "\10\10RDO\7IEO" 76 77 /* defines for CNTLI mode */ 78 #define DMC_HDPLX 02000 /* half duplex DDCMP operation */ 79 #define DMC_SEC 04000 /* half duplex secondary station */ 80 #define DMC_MAINT 00400 /* enter maintenance mode */ 81 82 /* defines for BACCI/O and BASEI mode */ 83 #define DMC_XMEM 0140000 /* xmem bit position */ 84 #define DMC_CCOUNT 0037777 /* character count mask */ 85 #define DMC_RESUME 0002000 /* resume (BASEI only) */ 86 87 /* defines for CNTLO */ 88 #define DMC_CNTMASK 01777 89 90 #define DMC_DATACK 01 91 #define DMC_TIMEOUT 02 92 #define DMC_NOBUFS 04 93 #define DMC_MAINTREC 010 94 #define DMC_LOSTDATA 020 95 #define DMC_DISCONN 0100 96 #define DMC_START 0200 97 #define DMC_NEXMEM 0400 98 #define DMC_ERROR 01000 99 100 #define DMC_FATAL (DMC_ERROR|DMC_NEXMEM|DMC_START|DMC_LOSTDATA|DMC_MAINTREC) 101 #define CNTLO_BITS \ 102 "\10\12ERROR\11NEXMEM\10START\7DISC\5LSTDATA\4MAINT\3NOBUF\2TIMEO\1DATACK" 103