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Annotation of Net2/arch/vax/uba/udareg.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Chris Torek.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. All advertising materials mentioning features or use of this software
        !            17:  *    must display the following acknowledgement:
        !            18:  *     This product includes software developed by the University of
        !            19:  *     California, Berkeley and its contributors.
        !            20:  * 4. Neither the name of the University nor the names of its contributors
        !            21:  *    may be used to endorse or promote products derived from this software
        !            22:  *    without specific prior written permission.
        !            23:  *
        !            24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            34:  * SUCH DAMAGE.
        !            35:  *
        !            36:  *     @(#)udareg.h    7.3 (Berkeley) 5/8/91
        !            37:  */
        !            38: 
        !            39: /*
        !            40:  * UDA50 registers and structures
        !            41:  */
        !            42: 
        !            43: /*
        !            44:  * Writing any value to udaip starts initialisation.  Reading from it
        !            45:  * when the UDA is running makes the UDA look through the command ring
        !            46:  * to find any new commands.  Reading udasa gives status; writing it
        !            47:  * during initialisation sets things up.
        !            48:  */
        !            49: struct udadevice {
        !            50:        u_short udaip;          /* initialisation and polling */
        !            51:        u_short udasa;          /* status and address */
        !            52: };
        !            53: 
        !            54: /*
        !            55:  * Bits in UDA status register during initialisation
        !            56:  */
        !            57: #define        UDA_ERR         0x8000  /* error */
        !            58: #define        UDA_STEP4       0x4000  /* step 4 has started */
        !            59: #define        UDA_STEP3       0x2000  /* step 3 has started */
        !            60: #define        UDA_STEP2       0x1000  /* step 2 has started */
        !            61: #define        UDA_STEP1       0x0800  /* step 1 has started */
        !            62: #define        UDA_NV          0x0400  /* no host settable interrupt vector */
        !            63: #define        UDA_QB          0x0200  /* controller supports Q22 bus */
        !            64: #define        UDA_DI          0x0100  /* controller implements diagnostics */
        !            65: #define        UDA_IE          0x0080  /* interrupt enable */
        !            66: #define        UDA_NCNRMASK    0x003f  /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */
        !            67: #define        UDA_IVECMASK    0x007f  /* in STEP2, bits 0-6 are interruptvec / 4 */
        !            68: #define        UDA_PI          0x0001  /* host requests adapter purge interrupts */
        !            69: 
        !            70: /*
        !            71:  * Bits in UDA status register after initialisation
        !            72:  */
        !            73: #define        UDA_GO          0x0001  /* run */
        !            74: 
        !            75: #define        UDASR_BITS \
        !            76: "\20\20ERR\17STEP4\16STEP3\15STEP2\14STEP1\13NV\12QB\11DI\10IE\1GO"
        !            77: 
        !            78: /*
        !            79:  * UDA Communications Area.  Note that this structure definition
        !            80:  * requires NRSP and NCMD to be defined already.
        !            81:  */
        !            82: struct udaca {
        !            83:        short   ca_xxx1;        /* unused */
        !            84:        char    ca_xxx2;        /* unused */
        !            85:        char    ca_bdp;         /* BDP to purge */
        !            86:        short   ca_cmdint;      /* command ring transition flag */
        !            87:        short   ca_rspint;      /* response ring transition flag */
        !            88:        long    ca_rspdsc[NRSP];/* response descriptors */
        !            89:        long    ca_cmddsc[NCMD];/* command descriptors */
        !            90: };
        !            91: 
        !            92: /*
        !            93:  * Simplified routines (e.g., uddump) reprogram the UDA50 for one command
        !            94:  * and one response at a time; uda1ca is like udaca except that it provides
        !            95:  * exactly one command and response descriptor.
        !            96:  */
        !            97: struct uda1ca {
        !            98:        short   ca_xxx1;
        !            99:        char    ca_xxx2;
        !           100:        char    ca_bdp;
        !           101:        short   ca_cmdint;
        !           102:        short   ca_rspint;
        !           103:        long    ca_rspdsc;
        !           104:        long    ca_cmddsc;
        !           105: };

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