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Annotation of 43BSDReno/sys/vax/rsp.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:  *     @(#)rsp.h       7.1 (Berkeley) 6/5/86
                      7:  */
                      8: 
                      9: /*
                     10:  * TU58 transfer protocol constants and data structures
                     11:  */
                     12: 
                     13: /*
                     14:  * Structure of a command packet
                     15:  */
                     16: struct packet {
                     17:        u_char  pk_flag;        /* indicates packet type (cmd, data, etc.) */
                     18:        u_char  pk_mcount;      /* length of packet (bytes) */
                     19:        u_char  pk_op;          /* operation to perform (read, write, etc.) */
                     20:        u_char  pk_mod;         /* modifier for op or returned status */
                     21:        u_char  pk_unit;        /* unit number */
                     22:        u_char  pk_sw;          /* switches */
                     23:        u_short pk_seq;         /* sequence number, always zero */
                     24:        u_short pk_count;       /* requested byte count for read or write */
                     25:        u_short pk_block;       /* block number for read, write, or seek */
                     26:        u_short pk_chksum;      /* checksum, by words with end around carry */
                     27: };
                     28: 
                     29: /*
                     30:  * States
                     31:  */
                     32: #define        TUS_INIT1       0       /* sending nulls */
                     33: #define        TUS_INIT2       1       /* sending inits */
                     34: #define        TUS_IDLE        2       /* initialized, no transfer in progress */
                     35: #define        TUS_SENDH       3       /* sending header */
                     36: #define        TUS_SENDD       4       /* sending data */
                     37: #define        TUS_SENDC       5       /* sending checksum */
                     38: #define        TUS_SENDR       6       /* sending read command packet */
                     39: #define        TUS_SENDW       7       /* sending write command packet */
                     40: #define        TUS_GETH        8       /* reading header */
                     41: #define        TUS_GETD        9       /* reading data */
                     42: #define        TUS_GETC        10      /* reading checksum */
                     43: #define        TUS_GET         11      /* reading an entire packet */
                     44: #define        TUS_WAIT        12      /* waiting for continue */
                     45: #define        TUS_RCVERR      13      /* receiver error in pseudo DMA routine */
                     46: #define        TUS_CHKERR      14      /* checksum error in pseudo DMA routine */
                     47: 
                     48: #define        TUS_NSTATES     15
                     49: 
                     50: #define        printstate(state) \
                     51:        if ((state) < TUS_NSTATES) \
                     52:                printf("%s", tustates[(state)]); \
                     53:        else \
                     54:                printf("%d", (state));
                     55: 
                     56: /*
                     57:  * Packet Flags
                     58:  */
                     59: #define        TUF_DATA        1               /* data packet */
                     60: #define        TUF_CMD         2               /* command packet */
                     61: #define        TUF_INITF       4               /* initialize */
                     62: #define        TUF_CONT        020             /* continue */
                     63: #define        TUF_XOFF        023             /* flow control */
                     64: 
                     65: /*
                     66:  * Op Codes
                     67:  */
                     68: #define        TUOP_NOOP       0               /* no operation */
                     69: #define        TUOP_INIT       1               /* initialize */
                     70: #define        TUOP_READ       2               /* read block */
                     71: #define        TUOP_WRITE      3               /* write block */
                     72: #define        TUOP_SEEK       5               /* seek to block */
                     73: #define TUOP_DIAGNOSE  7               /* run micro-diagnostics */
                     74: #define        TUOP_END        0100            /* end packet */
                     75: 
                     76: /*
                     77:  * Mod Flags
                     78:  */
                     79: #define TUMD_WRV        1               /* write with read verify */
                     80: 
                     81: /*
                     82:  * Switches
                     83:  */
                     84: #define        TUSW_MRSP       010             /* use Modified RSP */
                     85: 

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