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Annotation of XNU/osfmk/ppc/machparam.h, revision 1.1.1.1

1.1       root        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 [email protected] 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_ */

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