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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*-
- * Copyright (c) 1990, 1993
- * The Regents of the University of California. All rights reserved.
- * (c) UNIX System Laboratories, Inc.
- * All or some portions of this file are derived from material licensed
- * to the University of California by American Telephone and Telegraph
- * Co. or Unix System Laboratories, Inc. and are reproduced herein with
- * the permission of UNIX System Laboratories, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)param.h 8.1 (Berkeley) 4/4/95
- */
-
- /*
- * Machine dependent constants for Intel 386.
- */
-
- #ifndef _I386_PARAM_H_
- #define _I386_PARAM_H_
-
- /*
- * Round p (pointer or byte index) up to a correctly-aligned value for all
- * data types (int, long, ...). The result is u_int and must be cast to
- * any desired pointer type.
- */
- #define ALIGNBYTES 3
- #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
-
- #define NBPG 4096 /* bytes/page */
- #define PGOFSET (NBPG-1) /* byte offset into page */
- #define PGSHIFT 12 /* LOG2(NBPG) */
-
- #define DEV_BSIZE 512
- #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
- #define BLKDEV_IOSIZE 2048
- #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
-
- #define STACK_GROWS_UP 0 /* stack grows to lower addresses */
-
- #define CLSIZE 1
- #define CLSIZELOG2 0
-
- /*
- * 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
- #ifdef GATEWAY
- #define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */
- #else
- #define NMBCLUSTERS ((1024 * 512) / MCLBYTES) /* cl map size: 0.5MB */
- #endif
- #endif
-
- /*
- * Some macros for units conversion
- */
- /* Core clicks (NeXT_page_size bytes) to segments and vice versa */
- #define ctos(x) (x)
- #define stoc(x) (x)
-
- /* Core clicks (4096 bytes) to disk blocks */
- #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
- #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
- #define dtob(x) ((x)<<DEV_BSHIFT)
-
- /* clicks to bytes */
- #define ctob(x) ((x)<<PGSHIFT)
-
- /* bytes to clicks */
- #define btoc(x) (((unsigned)(x)+(NBPG-1))>>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 will be if we
- * add an entry to cdevsw/bdevsw for that purpose.
- * For now though just use DEV_BSIZE.
- */
- #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
-
- /*
- * Macros to decode (and encode) processor status word.
- */
- #define STATUS_WORD(rpl, ipl) (((ipl) << 8) | (rpl))
- #define USERMODE(x) (((x) & 3) == 3)
- #define BASEPRI(x) (((x) & (255 << 8)) == 0)
-
-
- #if defined(KERNEL) || defined(STANDALONE)
- #define DELAY(n) delay(n)
-
- #else /* defined(KERNEL) || defined(STANDALONE) */
- #define DELAY(n) { register int N = (n); while (--N > 0); }
- #endif /* defined(KERNEL) || defined(STANDALONE) */
-
- #endif /* _I386_PARAM_H_ */
-