osfmk/ppc/machparam.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  * Copyright (c) 1990, 1991 The University of Utah and
  30  * the Center for Software Science at the University of Utah (CSS).
  31  * All rights reserved.
  32  *
  33  * Permission to use, copy, modify and distribute this software is hereby
  34  * granted provided that (1) source code retains these copyright, permission,
  35  * and disclaimer notices, and (2) redistributions including binaries
  36  * reproduce the notices in supporting documentation, and (3) all advertising
  37  * materials mentioning features or use of this software display the following
  38  * acknowledgement: ``This product includes software developed by the Center
  39  * for Software Science at the University of Utah.''
  40  *
  41  * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  42  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
  43  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  44  *
  45  * CSS requests users of this software to return to css-dist@cs.utah.edu any
  46  * improvements that they make and grant CSS redistribution rights.
  47  *
  48  *      Utah $Hdr: machparam.h 1.7 92/05/22$
  49  */
  50
  51 #ifndef _PPC_MACHPARAM_H_
  52 #define _PPC_MACHPARAM_H_
  53
  54 /*
  55  * Machine dependent constants for ppc.
  56  * Added as needed (for device drivers).
  57  */
  58 #define NBPG    4096            /* bytes/page */
  59 #define PGSHIFT 12              /* LOG2(NBPG) */
  60
  61 #define DEV_BSHIFT      10               /* log2(DEV_BSIZE) */
  62
  63 /*
  64  * Disk devices do all IO in 1024-byte blocks.
  65  */
  66 #define DEV_BSIZE       1024
  67
  68 #define btop(x) ((x)>>PGSHIFT)
  69 #define ptob(x) ((x)<<PGSHIFT)
  70
  71 /* Clicks to disk blocks */
  72 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
  73
  74 /* Disk blocks to clicks */
  75 #define       dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
  76
  77 /* clicks to bytes */
  78 #define       ctob(x) ((x)<<PGSHIFT)
  79
  80 /* bytes to clicks */
  81 #define       btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
  82
  83 #endif /* _PPC_MACHPARAM_H_ */