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Annotation of Net2/arch/tahoe/vba/psproto.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1986 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)psproto.h   7.3 (Berkeley) 6/28/90
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * PS300-Host Handshake Protocol Definitions.
        !            38:  */
        !            39: 
        !            40: /*
        !            41:  * Commands sent from host->PS300.
        !            42:  *
        !            43:  * In the initial handshake carried out when requesting
        !            44:  * one of these commands be performed, the PS300 always
        !            45:  * returns the identical code to indicate success.
        !            46:  */
        !            47: #define PS_ABORT        0x1000  /* abort current command */
        !            48: #define PS_RESET        0x3000  /* reset device */
        !            49: #define PS_RDNET        0x5000  /* logical read */
        !            50: #define PS_LOOKUP       0x8000  /* name lookup */
        !            51: #define PS_RDPHY        0x9000  /* physical read */
        !            52: #define PS_WRPHY_SYNC   0xa000  /* physical write w/ sync */
        !            53: #define PS_WRPHY        0xb000  /* physical write */
        !            54: #define PS_WRNET        0xc000  /* logical write */
        !            55: #define PS_DETACH       0xd000  /* normal/diagnostic detach */
        !            56: #define PS_ATTACH       0xe000  /* normal attach */
        !            57: #define PS_DATTACH      0xf000  /* diagnostic attach */
        !            58: 
        !            59: #define PS_DIOREAD      0x4000  /* internal, wait for dioread attention */
        !            60: 
        !            61: /*
        !            62:  * Command responses from PS300->host.
        !            63:  */
        !            64: #define PS_DMAOK(code)  ((code)|0x0a00) /* successful dma transfer */ 
        !            65: #define PS_ADROK(code)  ((code)|0x0100) /* successful address tranfer */
        !            66: 
        !            67: #define PS_CODE(v)      ((v)&0xf000)    /* extract code from PS300 msg */
        !            68: #define PS_LUNIT(v)     ((v)&0x000f)    /* extract PS300 unit from msg */
        !            69: 
        !            70: /*
        !            71:  * Single unit PS300 address list.
        !            72:  */
        !            73: struct  psalist {
        !            74:         u_short nblocks;                /* # of i/o vectors (we always use 1) */
        !            75:         u_short addr[2];                /* PS300 address */
        !            76:         u_short wc;                     /* transfer size */
        !            77: };
        !            78: 
        !            79: /*
        !            80:  * The max dma size is actually 64KB, but
        !            81:  * we limit it to be just large enough for
        !            82:  * the maximum vector list as this is sufficient
        !            83:  * for our needs and we must allocate real
        !            84:  * memory to the intermediate buffer.
        !            85:  */
        !            86: #define PS_MAXDMA       (1024+2048*12)
        !            87: 
        !            88: /*
        !            89:  * Pseudo commands used internally by the driver.
        !            90:  */
        !            91: #define PS_DMAOUT       0x0100          /* dma buffer host->PS300 */
        !            92: #define PS_DMAIN        0x0200          /* dma buffer PS300->host */
        !            93: 
        !            94: /*
        !            95:  * Default timeouts.
        !            96:  */
        !            97: #define PS_TIMEOUT      30              /* dma/attention timeout (in hz) */
        !            98: #define PS_DIOTIMO      1000            /* dio polling timeout */

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