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

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)udareg.h    7.3 (Berkeley) 5/8/91
 */

/*
 * UDA50 registers and structures
 */

/*
 * Writing any value to udaip starts initialisation.  Reading from it
 * when the UDA is running makes the UDA look through the command ring
 * to find any new commands.  Reading udasa gives status; writing it
 * during initialisation sets things up.
 */
struct udadevice {
        u_short udaip;          /* initialisation and polling */
        u_short udasa;          /* status and address */
};

/*
 * Bits in UDA status register during initialisation
 */
#define UDA_ERR         0x8000  /* error */
#define UDA_STEP4       0x4000  /* step 4 has started */
#define UDA_STEP3       0x2000  /* step 3 has started */
#define UDA_STEP2       0x1000  /* step 2 has started */
#define UDA_STEP1       0x0800  /* step 1 has started */
#define UDA_NV          0x0400  /* no host settable interrupt vector */
#define UDA_QB          0x0200  /* controller supports Q22 bus */
#define UDA_DI          0x0100  /* controller implements diagnostics */
#define UDA_IE          0x0080  /* interrupt enable */
#define UDA_NCNRMASK    0x003f  /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */
#define UDA_IVECMASK    0x007f  /* in STEP2, bits 0-6 are interruptvec / 4 */
#define UDA_PI          0x0001  /* host requests adapter purge interrupts */

/*
 * Bits in UDA status register after initialisation
 */
#define UDA_GO          0x0001  /* run */

#define UDASR_BITS \
"\20\20ERR\17STEP4\16STEP3\15STEP2\14STEP1\13NV\12QB\11DI\10IE\1GO"

/*
 * UDA Communications Area.  Note that this structure definition
 * requires NRSP and NCMD to be defined already.
 */
struct udaca {
        short   ca_xxx1;        /* unused */
        char    ca_xxx2;        /* unused */
        char    ca_bdp;         /* BDP to purge */
        short   ca_cmdint;      /* command ring transition flag */
        short   ca_rspint;      /* response ring transition flag */
        long    ca_rspdsc[NRSP];/* response descriptors */
        long    ca_cmddsc[NCMD];/* command descriptors */
};

/*
 * Simplified routines (e.g., uddump) reprogram the UDA50 for one command
 * and one response at a time; uda1ca is like udaca except that it provides
 * exactly one command and response descriptor.
 */
struct uda1ca {
        short   ca_xxx1;
        char    ca_xxx2;
        char    ca_bdp;
        short   ca_cmdint;
        short   ca_rspint;
        long    ca_rspdsc;
        long    ca_cmddsc;
};