usr/src/sys/vax/uba/tmscpreg.h

/* @(#)tmscpreg.h       7.1 (Berkeley) %G% */

/*      @(#)tmscpreg.h  1.1     11/2/84 84/09/25        */

/****************************************************************
 *                                                              *
 *        Licensed from Digital Equipment Corporation           *
 *                       Copyright (c)                          *
 *               Digital Equipment Corporation                  *
 *                   Maynard, Massachusetts                     *
 *                         1985, 1986                           *
 *                    All rights reserved.                      *
 *                                                              *
 *        The Information in this software is subject to change *
 *   without notice and should not be construed as a commitment *
 *   by  Digital  Equipment  Corporation.   Digital   makes  no *
 *   representations about the suitability of this software for *
 *   any purpose.  It is supplied "As Is" without expressed  or *
 *   implied  warranty.                                         *
 *                                                              *
 *        If the Regents of the University of California or its *
 *   licensees modify the software in a manner creating         *
 *   diriviative copyright rights, appropriate copyright        *
 *   legends may be placed on  the drivative work in addition   *
 *   to that set forth above.                                   *
 *                                                              *
 ****************************************************************/
/*
 * TMSCP registers and structures
 */

struct tmscpdevice {
        short   tmscpip;        /* initialization and polling */
        short   tmscpsa;        /* status and address */
};

#define TMSCP_ERR               0100000 /* error bit */
#define TMSCP_STEP4     0040000 /* step 4 has started */
#define TMSCP_STEP3     0020000 /* step 3 has started */
#define TMSCP_STEP2     0010000 /* step 2 has started */
#define TMSCP_STEP1     0004000 /* step 1 has started */
#define TMSCP_NV                0002000 /* no host settable interrupt vector */
#define TMSCP_QB                0001000 /* controller supports Q22 bus */
#define TMSCP_DI                0000400 /* controller implements diagnostics */
#define TMSCP_OD                0000200 /* port allows odd host addr's in the buffer descriptor */
#define TMSCP_IE                0000200 /* interrupt enable */
#define TMSCP_MP                0000100 /* port supports address mapping */
#define TMSCP_LF                0000002 /* host requests last fail response packet */
#define TMSCP_PI                0000001 /* host requests adapter purge interrupts */
#define TMSCP_GO                0000001 /* start operation, after init */


/*
 * TMSCP Communications Area
 */

struct tmscpca {
        short   ca_xxx1;        /* unused */
        char    ca_xxx2;        /* unused */
        char    ca_bdp;         /* BDP to purge */
        short   ca_cmdint;      /* command queue transition interrupt flag */
        short   ca_rspint;      /* response queue transition interrupt flag */
        long    ca_rspdsc[NRSP];/* response descriptors */
        long    ca_cmddsc[NCMD];/* command descriptors */
};

#define ca_ringbase     ca_rspdsc[0]

#define TMSCP_OWN       0x80000000      /* port owns this descriptor (else host
 owns it) */
#define TMSCP_INT       0x40000000      /* allow interrupt on ring transition */

#define TMSCP_MAP       0x80000000      /* modifier for mapped buffer descriptors */

/*
 * TMSCP packet info (same as MSCP)
 */
struct mscp_header {
        short   tmscp_msglen;   /* length of MSCP packet */
        char    tmscp_credits;  /* low 4 bits: credits, high 4 bits: msgtype */
        char    tmscp_vcid;     /* virtual circuit id (connection id) */
};