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Annotation of Net2/arch/tahoe/vba/psproto.h, revision 1.1.1.1

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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