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Annotation of Gnu-Mach/scsi/rz.h, revision 1.1

1.1     ! root        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  [email protected]
        !            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:  *     File: rz.h
        !            28:  *     Author: Alessandro Forin, Carnegie Mellon University
        !            29:  *     Date:   9/90
        !            30:  *
        !            31:  *     Mapping between U*x-like indexing and controller+slave
        !            32:  *     Each controller handles at most 8 slaves, few controllers.
        !            33:  */
        !            34: 
        !            35: #if 0
        !            36: #define        rzcontroller(dev)       (((dev)>>6)&0x3)
        !            37: #define        rzslave(dev)            (((dev)>>3)&0x7)
        !            38: #endif 0
        !            39: #define        rzcontroller(dev)       (((dev)>>13)&0x3)
        !            40: #define rzslave(dev)           (((dev)>>10)&0x7)
        !            41: 
        !            42: #if 0
        !            43: #define        rzpartition(dev)        ((PARTITION_TYPE(dev)==0xf)?MAXPARTITIONS:((dev)&0x7))
        !            44: #endif 0
        !            45: #define rzpartition(dev)       ((dev)&0x3ff)
        !            46: 
        !            47: /* To address the full 256 luns use upper bits 8..12 */
        !            48: /* NOTE: Under U*x this means the next major up.. what a mess */
        !            49: #define rzlun(dev)             (((dev)&0x7) | (((dev)>>5)&0xf8))
        !            50: 
        !            51: /* note: whatever this was used for is no longer cared about -- Kevin */
        !            52: #define PARTITION_TYPE(dev)    (((dev)>>24)&0xf)
        !            53: #define PARTITION_ABSOLUTE     (0xf<<24)
        !            54: 
        !            55: #ifdef MACH_KERNEL
        !            56: #else  /*MACH_KERNEL*/
        !            57: #define tape_unit(dev)         ((((dev)&0xe0)>>3)|((dev)&0x3))
        !            58: #define        TAPE_UNIT(dev)          ((dev)&(~0xff))|(tape_unit((dev))<<3)
        !            59: #define        TAPE_REWINDS(dev)       (((dev)&0x1c)==0)||(((dev)&0x1c)==8)
        !            60: #endif /*MACH_KERNEL*/

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