osfmk/ppc/machparam.h

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