text: /* $NetBSD: xio.h,v 1.1 1995/10/30 20:58:20 gwr Exp $ */
  
  /*
   *
   * Copyright (c) 1995 Charles D. Cranor
   * All rights reserved.
   *
   * 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 Charles D. Cranor.
   * 4. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
   */
  
  /*
   * x i o . h 
   *
   * this file defines the software structure we use to ioctl the 
   * 753/7053.   this interface isn't set in stone and may (or may not)
   * need adjustment.
   *
   * author: Chuck Cranor <chuck@ccrc.wustl.edu>
   */
  
  /*
   * xylogic ioctl interface
   */
  
  struct xd_iocmd {
    u_char cmd;       /* in: command number */
    u_char subfn;     /* in: subfunction number */
    u_char errno;     /* out: error number */
    u_char tries;     /* out: number of tries */
    u_short sectcnt;  /* in,out: sector count (hw_spt on read drive param) */
    u_short dlen;     /* in: length of data buffer (good sanity check) */
    u_long block;     /* in: block number */
    caddr_t dptr;     /* in: data buffer to do I/O from */
  };
  
  #ifndef DIOSXDCMD
  #define DIOSXDCMD _IOWR('x', 101, struct xd_iocmd) /* do xd command */
  #endif
  
  #define XD_IOCMD_MAXS 16 /* max number of sectors you can do */
  #define XD_IOCMD_HSZ   4 /* size of one header */
  #define XD_IOCMD_DMSZ 24 /* defect map size */
  