date and time created 83/06/01 12:01:17 by helge

SCCS-vsn: sys/vax/vax/rsp.h 4.1

diff --git a/usr/src/sys/vax/vax/rsp.h b/usr/src/sys/vax/vax/rsp.h
new file mode 100644 (file)
index 0000000..37e9244
--- /dev/null
+++ b/usr/src/sys/vax/vax/rsp.h
@@ -0,0 +1,95 @@
+/*     rsp.h   4.1     83/06/01        */
+
+/*
+ * TU58 transfer protocol constants and data structures
+ */
+
+/*
+ * Structure of a command packet
+ */
+struct packet {
+       u_char  pk_flag;        /* indicates packet type (cmd, data, etc.) */
+       u_char  pk_mcount;      /* length of packet (bytes) */
+       u_char  pk_op;          /* operation to perform (read, write, etc.) */
+       u_char  pk_mod;         /* modifier for op or returned status */
+       u_char  pk_unit;        /* unit number */
+       u_char  pk_sw;          /* switches */
+       u_short pk_seq;         /* sequence number, always zero */
+       u_short pk_count;       /* requested byte count for read or write */
+       u_short pk_block;       /* block number for read, write, or seek */
+       u_short pk_chksum;      /* checksum, by words with end around carry */
+};
+
+/*
+ * State information
+ */
+struct tu {
+       u_char  *tu_rbptr;      /* pointer to buffer for read */
+       int     tu_rcnt;        /* how much to read */
+       u_char  *tu_wbptr;      /* pointer to buffer for write */
+       int     tu_wcnt;        /* how much to write */
+       int     tu_state;       /* current state of tansfer operation */
+       int     tu_flag;        /* read in progress flag */
+       char    *tu_addr;       /* real buffer data address */
+       int     tu_count;       /* real requested count */
+       int     tu_serrs;       /* count of soft errors */
+       int     tu_cerrs;       /* count of checksum errors */
+       int     tu_herrs;       /* count of hard errors */
+       char    tu_dopen[2];    /* drive is open */
+} tu;
+
+/*
+ * States
+ */
+#define        TUS_INIT1       0       /* sending nulls */
+#define        TUS_INIT2       1       /* sending inits */
+#define        TUS_IDLE        2       /* initialized, no transfer in progress */
+#define        TUS_SENDH       3       /* sending header */
+#define        TUS_SENDD       4       /* sending data */
+#define        TUS_SENDC       5       /* sending checksum */
+#define        TUS_SENDR       6       /* sending read command packet */
+#define        TUS_SENDW       7       /* sending write command packet */
+#define        TUS_GETH        8       /* reading header */
+#define        TUS_GETD        9       /* reading data */
+#define        TUS_GETC        10      /* reading checksum */
+#define        TUS_GET         11      /* reading an entire packet */
+#define        TUS_WAIT        12      /* waiting for continue */
+
+#define        TUS_NSTATES     13
+
+#define        printstate(state) \
+       if ((state) < TUS_NSTATES) \
+               printf("%s", tustates[(state)]); \
+       else \
+               printf("%d", (state));
+
+/*
+ * Packet Flags
+ */
+#define        TUF_DATA        1               /* data packet */
+#define        TUF_CMD         2               /* command packet */
+#define        TUF_INITF       4               /* initialize */
+#define        TUF_CONT        020             /* continue */
+#define        TUF_XOFF        023             /* flow control */
+
+/*
+ * Op Codes
+ */
+#define        TUOP_NOOP       0               /* no operation */
+#define        TUOP_INIT       1               /* initialize */
+#define        TUOP_READ       2               /* read block */
+#define        TUOP_WRITE      3               /* write block */
+#define        TUOP_SEEK       5               /* seek to block */
+#define TUOP_DIAGNOSE  7               /* run micro-diagnostics */
+#define        TUOP_END        0100            /* end packet */
+
+/*
+ * Mod Flags
+ */
+#define TUMD_WRV        1               /* write with read verify */
+
+/*
+ * Switches
+ */
+#define        TUSW_MRSP       010             /* use Modified RSP */
+