projects / apple / xnu.git / blame
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|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| de355530 A |
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. | |
| 1c79356b | 11 | * |
| de355530 A |
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 | |
| 1c79356b A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| de355530 A |
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. | |
| 1c79356b A |
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_ */ |