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