osfmk/ppc/machparam.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * Copyright (c) 1990, 1991 The University of Utah and
  27  * the Center for Software Science at the University of Utah (CSS).
  28  * All rights reserved.
  29  *
  30  * Permission to use, copy, modify and distribute this software is hereby
  31  * granted provided that (1) source code retains these copyright, permission,
  32  * and disclaimer notices, and (2) redistributions including binaries
  33  * reproduce the notices in supporting documentation, and (3) all advertising
  34  * materials mentioning features or use of this software display the following
  35  * acknowledgement: ``This product includes software developed by the Center
  36  * for Software Science at the University of Utah.''
  37  *
  38  * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  39  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
  40  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  41  *
  42  * CSS requests users of this software to return to css-dist@cs.utah.edu any
  43  * improvements that they make and grant CSS redistribution rights.
  44  *
  45  *      Utah $Hdr: machparam.h 1.7 92/05/22$
  46  */
  47
  48 #ifndef _PPC_MACHPARAM_H_
  49 #define _PPC_MACHPARAM_H_
  50
  51 /*
  52  * Machine dependent constants for ppc.
  53  * Added as needed (for device drivers).
  54  */
  55 #define NBPG    4096            /* bytes/page */
  56 #define PGSHIFT 12              /* LOG2(NBPG) */
  57
  58 #define DEV_BSHIFT      10               /* log2(DEV_BSIZE) */
  59
  60 /*
  61  * Disk devices do all IO in 1024-byte blocks.
  62  */
  63 #define DEV_BSIZE       1024
  64
  65 #define btop(x) ((x)>>PGSHIFT)
  66 #define ptob(x) ((x)<<PGSHIFT)
  67
  68 /* Clicks to disk blocks */
  69 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
  70
  71 /* Disk blocks to clicks */
  72 #define       dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
  73
  74 /* clicks to bytes */
  75 #define       ctob(x) ((x)<<PGSHIFT)
  76
  77 /* bytes to clicks */
  78 #define       btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
  79
  80 #endif /* _PPC_MACHPARAM_H_ */