/* * Copyright (c) 2000-2010 Apple 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) 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_ #include <i386/_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 __DARWIN_ALIGNBYTES #define ALIGN(p) __DARWIN_ALIGN(p) #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 (128 * 1024) /* max raw I/O transfer size */ #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 MSIZESHIFT 8 /* 256 */ #define MSIZE (1 << MSIZESHIFT) /* size of an mbuf */ #define MCLSHIFT 11 /* 2048 */ #define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */ #define MBIGCLSHIFT 12 /* 4096 */ #define MBIGCLBYTES (1 << MBIGCLSHIFT) /* size of a big cluster */ #define M16KCLSHIFT 14 /* 16384 */ #define M16KCLBYTES (1 << M16KCLSHIFT) /* size of a jumbo cluster */ #define MCLOFSET (MCLBYTES - 1) #ifndef NMBCLUSTERS #define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */ #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) { int N = (n); while (--N > 0); } #endif /* defined(KERNEL) || defined(STANDALONE) */ #endif /* _I386_PARAM_H_ */