rz.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991,1990 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        rz.h,v $
   29  * Revision 2.9  93/08/03  12:33:48  mrt
   30  *      Added rzlun().
   31  *      [93/07/29  23:40:26  af]
   32  * 
   33  * Revision 2.8  92/04/03  12:09:55  rpd
   34  *      Fabricate extra partition info to deal with the
   35  *      first alternate partition range and "PARITITON_ABSOLUTE".
   36  *      [92/04/01            rvb]
   37  * 
   38  * Revision 2.7  91/06/19  11:56:57  rvb
   39  *      File moved here from mips/PMAX since it is now "MI" code, also
   40  *      used by Vax3100 and soon -- the omron luna88k.
   41  *      [91/06/04            rvb]
   42  * 
   43  *      A couple of macros were not fully parenthesized, which screwed
   44  *      up the second scsi bus on Vaxen.  [This was the only bug in the
   45  *      multi-bus code, amazing].
   46  *      [91/05/30            af]
   47  * 
   48  * Revision 2.6  91/05/14  17:26:19  mrt
   49  *      Correcting copyright
   50  * 
   51  * Revision 2.5  91/05/13  06:04:20  af
   52  *      Redefined naive macro names to avoid conflicts.
   53  *      [91/05/12  16:08:55  af]
   54  * 
   55  * Revision 2.4  91/02/05  17:43:42  mrt
   56  *      Added author notices
   57  *      [91/02/04  11:16:33  mrt]
   58  * 
   59  *      Changed to use new Mach copyright
   60  *      [91/02/02  12:15:29  mrt]
   61  * 
   62  * Revision 2.3  90/12/05  23:33:55  af
   63  * 
   64  * 
   65  * Revision 2.1.1.1  90/11/01  03:43:37  af
   66  *      Created.
   67  *      [90/10/21            af]
   68  */
   69 /*
   70  *      File: rz.h
   71  *      Author: Alessandro Forin, Carnegie Mellon University
   72  *      Date:   9/90
   73  *
   74  *      Mapping between U*x-like indexing and controller+slave
   75  *      Each controller handles at most 8 slaves, few controllers.
   76  */
   77 
   78 #define rzcontroller(dev)       (((dev)>>6)&0x3)
   79 #define rzslave(dev)            (((dev)>>3)&0x7)
   80 #define rzpartition(dev)        ((PARTITION_TYPE(dev)==0xf)?MAXPARTITIONS:((dev)&0x7))
   81 /* To address the full 256 luns use upper bits 8..12 */
   82 /* NOTE: Under U*x this means the next major up.. what a mess */
   83 #define rzlun(dev)              (((dev)&0x7) | (((dev)>>5)&0xf8))
   84 
   85 #define PARTITION_TYPE(dev)     (((dev)>>24)&0xf)
   86 #define PARTITION_ABSOLUTE      (0xf<<24)
   87 
   88 #ifdef  MACH_KERNEL
   89 #else   /*MACH_KERNEL*/
   90 #define tape_unit(dev)          ((((dev)&0xe0)>>3)|((dev)&0x3))
   91 #define TAPE_UNIT(dev)          ((dev)&(~0xff))|(tape_unit((dev))<<3)
   92 #define TAPE_REWINDS(dev)       (((dev)&0x1c)==0)||(((dev)&0x1c)==8)
   93 #endif  /*MACH_KERNEL*/

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FreeBSD/Linux Kernel Cross Reference sys/scsi/rz.h

FreeBSD/Linux Kernel Cross Reference
sys/scsi/rz.h