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Annotation of Gnu-Mach/device/param.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:  *     Author: David B. Golub, Carnegie Mellon University
        !            28:  *     Date:   7/90
        !            29:  */
        !            30: 
        !            31: #ifndef        _DEVICE_PARAM_H_
        !            32: #define        _DEVICE_PARAM_H_
        !            33: 
        !            34: /*
        !            35:  * Compatibility definitions for disk IO.
        !            36:  */
        !            37: 
        !            38: /*
        !            39:  * Disk devices do all IO in 512-byte blocks.
        !            40:  */
        !            41: #define        DEV_BSIZE       512
        !            42: 
        !            43: /*
        !            44:  * Conversion between bytes and disk blocks.
        !            45:  */
        !            46: #define        btodb(byte_offset)      ((byte_offset) >> 9)
        !            47: #define        dbtob(block_number)     ((block_number) << 9)
        !            48: 
        !            49: #endif /* _DEVICE_PARAM_H_ */

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