osfmk/ppc/machparam.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * @OSF_COPYRIGHT@
  32  */
  33 /*
  34  * Copyright (c) 1990, 1991 The University of Utah and
  35  * the Center for Software Science at the University of Utah (CSS).
  36  * All rights reserved.
  37  *
  38  * Permission to use, copy, modify and distribute this software is hereby
  39  * granted provided that (1) source code retains these copyright, permission,
  40  * and disclaimer notices, and (2) redistributions including binaries
  41  * reproduce the notices in supporting documentation, and (3) all advertising
  42  * materials mentioning features or use of this software display the following
  43  * acknowledgement: ``This product includes software developed by the Center
  44  * for Software Science at the University of Utah.''
  45  *
  46  * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  47  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
  48  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  49  *
  50  * CSS requests users of this software to return to css-dist@cs.utah.edu any
  51  * improvements that they make and grant CSS redistribution rights.
  52  *
  53  *      Utah $Hdr: machparam.h 1.7 92/05/22$
  54  */
  55
  56 #ifndef _PPC_MACHPARAM_H_
  57 #define _PPC_MACHPARAM_H_
  58
  59 /*
  60  * Machine dependent constants for ppc.
  61  * Added as needed (for device drivers).
  62  */
  63 #define NBPG    4096            /* bytes/page */
  64 #define PGSHIFT 12              /* LOG2(NBPG) */
  65
  66 #define DEV_BSHIFT      10               /* log2(DEV_BSIZE) */
  67
  68 /*
  69  * Disk devices do all IO in 1024-byte blocks.
  70  */
  71 #define DEV_BSIZE       1024
  72
  73 #define btop(x) ((x)>>PGSHIFT)
  74 #define ptob(x) ((x)<<PGSHIFT)
  75
  76 /* Clicks to disk blocks */
  77 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
  78
  79 /* Disk blocks to clicks */
  80 #define       dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
  81
  82 /* clicks to bytes */
  83 #define       ctob(x) ((x)<<PGSHIFT)
  84
  85 /* bytes to clicks */
  86 #define       btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
  87
  88 #endif /* _PPC_MACHPARAM_H_ */