FreeBSD/Linux Kernel Cross Reference
sys/i386ipsc/sd.h

     /* 
      * Mach Operating System
      * Copyright (c) 1991 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     * Copyright 1988, 1989, 1990, 1991 by Intel Corporation,
     * Santa Clara, California.
     * 
     *                          All Rights Reserved
     * 
     * Permission to use, copy, modify, and distribute this software and its
     * documentation for any purpose and without fee is hereby granted,
     * provided that the above copyright notice appears in all copies and that
     * both the copyright notice and this permission notice appear in
     * supporting documentation, and that the name of Intel not be used in
     * advertising or publicity pertaining to distribution of the software
     * without specific, written prior permission.
     * 
     * INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING
     * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
     * SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL
     * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
     * PROFITS, WHETHER IN ACTION OF CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS
     * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
     * THIS SOFTWARE.
     */
    /*
     * HISTORY
     * $Log:        sd.h,v $
     * Revision 2.4  91/06/18  20:50:35  jsb
     *      New copyright from Intel.
     *      [91/06/18  20:07:53  jsb]
     * 
     * Revision 2.3  91/06/06  17:04:57  jsb
     *      From Don Cameron: changed NDRIVES from 1 to 4.
     *      [91/05/13  17:10:29  jsb]
     * 
     * Revision 2.2  90/12/04  14:47:45  jsb
     *      First checkin.
     *      [90/12/04  10:58:27  jsb]
     * 
     */ 
    
    #define BOOTRECORDSIGNATURE                     (0x55aa & 0x00ff)
    
    #define PARTITION(z)    (minor(z) & 0x0f)
    #define UNIT(z)         (minor(z) >> 4)
    
    #define PDLOCATION      29      
    
    #define NDRIVES 4
    #define SECSIZE 512
    
    #define GETALTTBL       (('H' <<8) | 1)
    #define FMTBAD          (('H' <<8) | 2)
    #define BAD_BLK         0x80            /* needed for V_VERIFY */
    
    /*
     * Driver states
     */
    #define NULL_STEP       0
    #define MSG_STEP        1
    #define STATUS_STEP     2
    #define DISC_STEP       3
    #define DONE_STEP       4
    #define CMD_STEP        5
    #define RSEL_STEP       6
    
    
    typedef long paddr_t;
    
    /*  hh holds the state of the current block I/O request for each drive */
    struct hh {
            unsigned char   cmd[12];        /* SCSI command bytes */
            short   cmd_len;                /* Command length */
            char    cmd_busy;               /* Command not yet complete */
            char    direction;              /* Data transfer direction, 0 = out */
            long    transfer_length;        /* How much data to move */
           unsigned char   cmd_st;         /* Command completion status */
           unsigned char   cmd_msg;        /* Command completion message byte */
           unsigned char   state;          /* Current state (tape) */
           unsigned char   step;           /* Current step (tape) */
           unsigned char   retry_count;    /* # of times cmd has been tried */
           unsigned char   status;         /* stat read from controller port */
           struct  buf     buflst;         /* head of list of IO buffers */
           short           buf_io;         /* TRUE if using IO buffer */
           unsigned char   wait_to_drain;  /* used by format, open, close */
           unsigned char   restore_request;/* restore command */
           unsigned char   format_request; /* let's do some formatting */
           unsigned char   open_close_ioctl_mutex; /* for open/closing/fmt partitions */
           daddr_t physblock;              /* block # relative to partition 0 */
           paddr_t rw_addr;                /* ram addr to read/write from/to */
           unsigned int    cylinder;       /* cylinder # rel. to part. 0 */
           unsigned int    head;           /* as it looks */
           unsigned int    sector;         /* as it looks */
   };

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