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Annotation of Gnu-Mach/device/param.h, revision 1.1.1.1

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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