| 1 | /*␊ |
| 2 | * Copyright (c) 2000-2010 Apple Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 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␊ |
| 24 | * limitations under the License.␊ |
| 25 | * ␊ |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊ |
| 27 | */␊ |
| 28 | /*-␊ |
| 29 | * Copyright (c) 1990, 1993␊ |
| 30 | *␉The Regents of the University of California. All rights reserved.␊ |
| 31 | * (c) UNIX System Laboratories, Inc.␊ |
| 32 | * All or some portions of this file are derived from material licensed␊ |
| 33 | * to the University of California by American Telephone and Telegraph␊ |
| 34 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with␊ |
| 35 | * the permission of UNIX System Laboratories, Inc.␊ |
| 36 | *␊ |
| 37 | * Redistribution and use in source and binary forms, with or without␊ |
| 38 | * modification, are permitted provided that the following conditions␊ |
| 39 | * are met:␊ |
| 40 | * 1. Redistributions of source code must retain the above copyright␊ |
| 41 | * notice, this list of conditions and the following disclaimer.␊ |
| 42 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 43 | * notice, this list of conditions and the following disclaimer in the␊ |
| 44 | * documentation and/or other materials provided with the distribution.␊ |
| 45 | * 3. All advertising materials mentioning features or use of this software␊ |
| 46 | * must display the following acknowledgement:␊ |
| 47 | *␉This product includes software developed by the University of␊ |
| 48 | *␉California, Berkeley and its contributors.␊ |
| 49 | * 4. Neither the name of the University nor the names of its contributors␊ |
| 50 | * may be used to endorse or promote products derived from this software␊ |
| 51 | * without specific prior written permission.␊ |
| 52 | *␊ |
| 53 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND␊ |
| 54 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE␊ |
| 55 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
| 56 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE␊ |
| 57 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
| 58 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS␊ |
| 59 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)␊ |
| 60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
| 61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
| 62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
| 63 | * SUCH DAMAGE.␊ |
| 64 | *␊ |
| 65 | *␉@(#)param.h␉8.1 (Berkeley) 4/4/95␊ |
| 66 | */␊ |
| 67 | ␊ |
| 68 | /*␊ |
| 69 | * Machine dependent constants for Intel 386.␊ |
| 70 | */␊ |
| 71 | ␊ |
| 72 | #ifndef _I386_PARAM_H_␊ |
| 73 | #define _I386_PARAM_H_␊ |
| 74 | ␊ |
| 75 | #include <i386/_param.h>␊ |
| 76 | ␊ |
| 77 | /*␊ |
| 78 | * Round p (pointer or byte index) up to a correctly-aligned value for all␊ |
| 79 | * data types (int, long, ...). The result is unsigned int and must be␊ |
| 80 | * cast to any desired pointer type.␊ |
| 81 | */␊ |
| 82 | #define␉ALIGNBYTES␉__DARWIN_ALIGNBYTES␊ |
| 83 | #define␉ALIGN(p)␉__DARWIN_ALIGN(p)␊ |
| 84 | ␊ |
| 85 | #define␉NBPG␉␉4096␉␉/* bytes/page */␊ |
| 86 | #define␉PGOFSET␉␉(NBPG-1)␉/* byte offset into page */␊ |
| 87 | #define␉PGSHIFT␉␉12␉␉/* LOG2(NBPG) */␊ |
| 88 | ␊ |
| 89 | #define␉DEV_BSIZE␉512␊ |
| 90 | #define␉DEV_BSHIFT␉9␉␉/* log2(DEV_BSIZE) */␊ |
| 91 | #define BLKDEV_IOSIZE␉2048␊ |
| 92 | #define␉MAXPHYS␉␉(128 * 1024)␉/* max raw I/O transfer size */␊ |
| 93 | ␊ |
| 94 | #define␉CLSIZE␉␉1␊ |
| 95 | #define␉CLSIZELOG2␉0␊ |
| 96 | ␊ |
| 97 | /*␊ |
| 98 | * Constants related to network buffer management.␊ |
| 99 | * MCLBYTES must be no larger than CLBYTES (the software page size), and,␊ |
| 100 | * on machines that exchange pages of input or output buffers with mbuf␊ |
| 101 | * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple␊ |
| 102 | * of the hardware page size.␊ |
| 103 | */␊ |
| 104 | #define␉MSIZESHIFT␉8␉␉␉/* 256 */␊ |
| 105 | #define␉MSIZE␉␉(1 << MSIZESHIFT)␉/* size of an mbuf */␊ |
| 106 | #define␉MCLSHIFT␉11␉␉␉/* 2048 */␊ |
| 107 | #define␉MCLBYTES␉(1 << MCLSHIFT)␉␉/* size of an mbuf cluster */␊ |
| 108 | #define␉MBIGCLSHIFT␉12␉␉␉/* 4096 */␊ |
| 109 | #define␉MBIGCLBYTES␉(1 << MBIGCLSHIFT)␉/* size of a big cluster */␊ |
| 110 | #define␉M16KCLSHIFT␉14␉␉␉/* 16384 */␊ |
| 111 | #define␉M16KCLBYTES␉(1 << M16KCLSHIFT)␉/* size of a jumbo cluster */␊ |
| 112 | ␊ |
| 113 | #define␉MCLOFSET␉(MCLBYTES - 1)␊ |
| 114 | #ifndef NMBCLUSTERS␊ |
| 115 | #ifdef GATEWAY␊ |
| 116 | #define␉NMBCLUSTERS␉((1024 * 1024) / MCLBYTES)␉/* cl map size: 1MB */␊ |
| 117 | #else␊ |
| 118 | #define␉NMBCLUSTERS␉((1024 * 512) / MCLBYTES)␉/* cl map size: 0.5MB */␊ |
| 119 | #endif␊ |
| 120 | #endif␊ |
| 121 | ␊ |
| 122 | /*␊ |
| 123 | * Some macros for units conversion␊ |
| 124 | */␊ |
| 125 | /* Core clicks (NeXT_page_size bytes) to segments and vice versa */␊ |
| 126 | #define␉ctos(x)␉(x)␊ |
| 127 | #define␉stoc(x)␉(x)␊ |
| 128 | ␊ |
| 129 | /* Core clicks (4096 bytes) to disk blocks */␊ |
| 130 | #define␉ctod(x)␉((x)<<(PGSHIFT-DEV_BSHIFT))␊ |
| 131 | #define␉dtoc(x)␉((x)>>(PGSHIFT-DEV_BSHIFT))␊ |
| 132 | #define␉dtob(x)␉((x)<<DEV_BSHIFT)␊ |
| 133 | ␊ |
| 134 | /* clicks to bytes */␊ |
| 135 | #define␉ctob(x)␉((x)<<PGSHIFT)␊ |
| 136 | ␊ |
| 137 | /* bytes to clicks */␊ |
| 138 | #define␉btoc(x)␉(((unsigned)(x)+(NBPG-1))>>PGSHIFT)␊ |
| 139 | ␊ |
| 140 | #ifdef __APPLE__␊ |
| 141 | #define btodb(bytes, devBlockSize) \␊ |
| 142 | ((unsigned)(bytes) / devBlockSize)␊ |
| 143 | #define dbtob(db, devBlockSize) \␊ |
| 144 | ((unsigned)(db) * devBlockSize)␊ |
| 145 | #else␊ |
| 146 | #define␉btodb(bytes)␉ ␉␉/* calculates (bytes / DEV_BSIZE) */ \␊ |
| 147 | ␉((unsigned)(bytes) >> DEV_BSHIFT)␊ |
| 148 | #define␉dbtob(db)␉␉␉/* calculates (db * DEV_BSIZE) */ \␊ |
| 149 | ␉((unsigned)(db) << DEV_BSHIFT)␊ |
| 150 | #endif␊ |
| 151 | ␊ |
| 152 | /*␊ |
| 153 | * Map a ``block device block'' to a file system block.␊ |
| 154 | * This should be device dependent, and will be if we␊ |
| 155 | * add an entry to cdevsw/bdevsw for that purpose.␊ |
| 156 | * For now though just use DEV_BSIZE.␊ |
| 157 | */␊ |
| 158 | #define␉bdbtofsb(bn)␉((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))␊ |
| 159 | ␊ |
| 160 | /*␊ |
| 161 | * Macros to decode (and encode) processor status word.␊ |
| 162 | */␊ |
| 163 | #define STATUS_WORD(rpl, ipl)␉(((ipl) << 8) | (rpl))␊ |
| 164 | #define␉USERMODE(x)␉␉(((x) & 3) == 3)␊ |
| 165 | #define␉BASEPRI(x)␉␉(((x) & (255 << 8)) == 0)␊ |
| 166 | ␊ |
| 167 | ␊ |
| 168 | #if␉defined(KERNEL) || defined(STANDALONE)␊ |
| 169 | #define␉DELAY(n) delay(n)␊ |
| 170 | ␊ |
| 171 | #else␉/* defined(KERNEL) || defined(STANDALONE) */␊ |
| 172 | #define␉DELAY(n)␉{ register int N = (n); while (--N > 0); }␊ |
| 173 | #endif␉/* defined(KERNEL) || defined(STANDALONE) */␊ |
| 174 | ␊ |
| 175 | #endif /* _I386_PARAM_H_ */␊ |
| 176 | |
