[apple/xnu.git] / bsd / ppc / param.h

/*
 * Copyright (c) 2000-2004 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@
 */
/* Copyright (c) 1993,1995 NeXT Computer, Inc. All Rights Reserved */

#ifndef	_PPC_PARAM_H_
#define	_PPC_PARAM_H_

/*
 * Round p (pointer or byte index) up to a correctly-aligned value for all
 * data types (int, long, ...).   The result is unsigned int and must be
 * cast to any desired pointer type.
 */
#define	ALIGNBYTES	3
#define	ALIGN(p)	(((unsigned int)(p) + ALIGNBYTES) &~ ALIGNBYTES)

#define	NBPG		4096		/* bytes/page */
#define	PGOFSET		(NBPG-1)	/* byte offset into page */
#define	PGSHIFT		12		/* LOG2(NBPG) */

#define NBSEG		0x40000000	/* bytes/segment (quadrant) */
#define	SEGOFSET	(NBSEG-1)	/* byte offset into segment */
#define	SEGSHIFT	30		/* LOG2(NBSEG) */

#define	DEV_BSIZE	512
#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
#define BLKDEV_IOSIZE	2048
#define	MAXPHYS		(128 * 1024)	/* max raw I/O transfer size */

#define	STACK_GROWTH_UP	0		/* stack grows to lower addresses */

#define	CLSIZE		1
#define	CLSIZELOG2	0

#define STACKSIZE 4			/* pages in kernel stack */
#define	UPAGES	0	/* total pages in u-area */
					/* red zone is beyond this */

/*
 * Constants related to network buffer management.
 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
 * on machines that exchange pages of input or output buffers with mbuf
 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 * of the hardware page size.
 */
#define	MSIZE		256		/* size of an mbuf */
#define	MCLBYTES	2048		/* large enough for ether MTU */
#define	MCLSHIFT	11
#define	MCLOFSET	(MCLBYTES - 1)
#ifndef NMBCLUSTERS
#if GATEWAY
#define	NMBCLUSTERS	((1024 * 1024) / MCLBYTES)	/* cl map size: 1MB */
#else
#define	NMBCLUSTERS	((1024 * 1024) / MCLBYTES)	
		/* cl map size was  0.5MB when MSIZE was 128, now it's 1MB*/
#endif
#endif

/* pages ("clicks") (NBPG bytes) to disk blocks */
#define	ctod(x)	((x)<<(PGSHIFT-DEV_BSHIFT))
#define	dtoc(x)	((x)>>(PGSHIFT-DEV_BSHIFT))
#define	dtob(x)	((x)<<DEV_BSHIFT)

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

/* bytes to pages */
#define	btoc(x)	(((unsigned)(x)+(PGOFSET))>>PGSHIFT)
#ifdef __APPLE__
#define  btodb(bytes, devBlockSize)         \
        ((unsigned)(bytes) / devBlockSize)
#define  dbtob(db, devBlockSize)            \
             ((unsigned)(db) * devBlockSize)
#else
#define	btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
	((unsigned)(bytes) >> DEV_BSHIFT)
#define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
	((unsigned)(db) << DEV_BSHIFT)
#endif

/*
 * Map a ``block device block'' to a file system block.
 * This should be device dependent, and should use the bsize
 * field from the disk label.
 * For now though just use DEV_BSIZE.
 */
#define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))

/* from machdep/ppc/proc_reg.h */
#ifdef __BIG_ENDIAN__
#define ENDIAN_MASK(val,size) (1 << (size-1 - val))
#else
#error code not ported to little endian targets yet
#endif /* __BIG_ENDIAN__ */

#ifndef MASK
#define MASK(PART)	ENDIAN_MASK(PART ## _BIT, 32)
#endif

#define	MSR_EE_BIT	16
#define	MSR_PR_BIT	17
#define USERMODE(msr) (msr & MASK(MSR_PR) ? TRUE : FALSE)
#define BASEPRI(msr) (msr & MASK(MSR_EE) ? TRUE : FALSE)
/* end of from proc_reg.h */

#if	defined(KERNEL) || defined(STANDALONE)
#define	DELAY(n) delay(n)
#else
#define	DELAY(n)	{ register int N = (n); while (--N > 0); }
#endif	/* defined(KERNEL) || defined(STANDALONE) */

#define	NPIDS		16	/* maximum number of PIDs per process */
#define	NIOPIDS		8	/* maximum number of IO space PIDs */

#endif	/* _PPC_PARAM_H_ */
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 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.
	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
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
1c79356b A	28	/* Copyright (c) 1993,1995 NeXT Computer, Inc. All Rights Reserved */
1c79356b A	29
	30	#ifndef _PPC_PARAM_H_
	31	#define _PPC_PARAM_H_
	32
	33	/*
	34	* Round p (pointer or byte index) up to a correctly-aligned value for all
91447636 A	35	* data types (int, long, ...). The result is unsigned int and must be
91447636 A	36	* cast to any desired pointer type.
1c79356b A	37	*/
1c79356b A	38	#define ALIGNBYTES 3
91447636	39	#define ALIGN(p) (((unsigned int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
1c79356b A	40
	41	#define NBPG 4096 /* bytes/page */
	42	#define PGOFSET (NBPG-1) /* byte offset into page */
	43	#define PGSHIFT 12 /* LOG2(NBPG) */
	44
	45	#define NBSEG 0x40000000 /* bytes/segment (quadrant) */
	46	#define SEGOFSET (NBSEG-1) /* byte offset into segment */
	47	#define SEGSHIFT 30 /* LOG2(NBSEG) */
	48
	49	#define DEV_BSIZE 512
	50	#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
	51	#define BLKDEV_IOSIZE 2048
	52	#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
	53
	54	#define STACK_GROWTH_UP 0 /* stack grows to lower addresses */
	55
	56	#define CLSIZE 1
	57	#define CLSIZELOG2 0
	58
	59	#define STACKSIZE 4 /* pages in kernel stack */
9bccf70c	60	#define UPAGES 0 /* total pages in u-area */
1c79356b A	61	/* red zone is beyond this */
	62
	63	/*
	64	* Constants related to network buffer management.
	65	* MCLBYTES must be no larger than CLBYTES (the software page size), and,
	66	* on machines that exchange pages of input or output buffers with mbuf
	67	* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
	68	* of the hardware page size.
	69	*/
	70	#define MSIZE 256 /* size of an mbuf */
	71	#define MCLBYTES 2048 /* large enough for ether MTU */
	72	#define MCLSHIFT 11
	73	#define MCLOFSET (MCLBYTES - 1)
	74	#ifndef NMBCLUSTERS
	75	#if GATEWAY
	76	#define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */
	77	#else
	78	#define NMBCLUSTERS ((1024 * 1024) / MCLBYTES)
	79	/* cl map size was 0.5MB when MSIZE was 128, now it's 1MB*/
	80	#endif
	81	#endif
	82
	83	/* pages ("clicks") (NBPG bytes) to disk blocks */
	84	#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
	85	#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
	86	#define dtob(x) ((x)<<DEV_BSHIFT)
	87
	88	/* pages to bytes */
	89	#define ctob(x) ((x)<<PGSHIFT)
	90
	91	/* bytes to pages */
	92	#define btoc(x) (((unsigned)(x)+(PGOFSET))>>PGSHIFT)
	93	#ifdef __APPLE__
	94	#define btodb(bytes, devBlockSize) \
	95	((unsigned)(bytes) / devBlockSize)
	96	#define dbtob(db, devBlockSize) \
	97	((unsigned)(db) * devBlockSize)
	98	#else
	99	#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
	100	((unsigned)(bytes) >> DEV_BSHIFT)
	101	#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
	102	((unsigned)(db) << DEV_BSHIFT)
	103	#endif
	104
	105	/*
	106	* Map a ``block device block'' to a file system block.
	107	* This should be device dependent, and should use the bsize
	108	* field from the disk label.
	109	* For now though just use DEV_BSIZE.
	110	*/
	111	#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
	112
	113	/* from machdep/ppc/proc_reg.h */
55e303ae	114	#ifdef __BIG_ENDIAN__
1c79356b A	115	#define ENDIAN_MASK(val,size) (1 << (size-1 - val))
	116	#else
	117	#error code not ported to little endian targets yet
	118	#endif /* __BIG_ENDIAN__ */
	119
	120	#ifndef MASK
	121	#define MASK(PART) ENDIAN_MASK(PART ## _BIT, 32)
	122	#endif
	123
	124	#define MSR_EE_BIT 16
	125	#define MSR_PR_BIT 17
	126	#define USERMODE(msr) (msr & MASK(MSR_PR) ? TRUE : FALSE)
	127	#define BASEPRI(msr) (msr & MASK(MSR_EE) ? TRUE : FALSE)
	128	/* end of from proc_reg.h */
	129
	130	#if defined(KERNEL) \|\| defined(STANDALONE)
	131	#define DELAY(n) delay(n)
	132	#else
	133	#define DELAY(n) { register int N = (n); while (--N > 0); }
	134	#endif /* defined(KERNEL) \|\| defined(STANDALONE) */
	135
	136	#define NPIDS 16 /* maximum number of PIDs per process */
	137	#define NIOPIDS 8 /* maximum number of IO space PIDs */
	138
	139	#endif /* _PPC_PARAM_H_ */