[apple/xnu.git] / osfmk / ppc / machparam.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Copyright (c) 1990, 1991 The University of Utah and
 * the Center for Software Science at the University of Utah (CSS).
 * All rights reserved.
 *
 * Permission to use, copy, modify and distribute this software is hereby
 * granted provided that (1) source code retains these copyright, permission,
 * and disclaimer notices, and (2) redistributions including binaries
 * reproduce the notices in supporting documentation, and (3) all advertising
 * materials mentioning features or use of this software display the following
 * acknowledgement: ``This product includes software developed by the Center
 * for Software Science at the University of Utah.''
 *
 * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
 * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * CSS requests users of this software to return to css-dist@cs.utah.edu any
 * improvements that they make and grant CSS redistribution rights.
 *
 * 	Utah $Hdr: machparam.h 1.7 92/05/22$
 */

#ifndef _PPC_MACHPARAM_H_
#define _PPC_MACHPARAM_H_

/*
 * Machine dependent constants for ppc. 
 * Added as needed (for device drivers).
 */
#define	NBPG	4096		/* bytes/page */
#define	PGSHIFT	12		/* LOG2(NBPG) */

#define DEV_BSHIFT      10               /* log2(DEV_BSIZE) */

/*
 * Disk devices do all IO in 1024-byte blocks.
 */
#define	DEV_BSIZE	1024

#define	btop(x)	((x)>>PGSHIFT)
#define	ptob(x)	((x)<<PGSHIFT)

/* Clicks to disk blocks */
#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))

/* Disk blocks to clicks */
#define       dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))

/* clicks to bytes */
#define       ctob(x) ((x)<<PGSHIFT)

/* bytes to clicks */
#define       btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)

#endif /* _PPC_MACHPARAM_H_ */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	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.
8f6c56a5	14	*
2d21ac55 A	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
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	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.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	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_ */