1 | /*␊ |
2 | * Copyright (c) 2000-2002 Apple Computer, 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␉MSIZE␉␉256␉␉/* size of an mbuf */␊ |
105 | #define␉MCLBYTES␉2048␉␉/* large enough for ether MTU */␊ |
106 | #define␉MCLSHIFT␉11␊ |
107 | #define␉MCLOFSET␉(MCLBYTES - 1)␊ |
108 | #ifndef NMBCLUSTERS␊ |
109 | #ifdef GATEWAY␊ |
110 | #define␉NMBCLUSTERS␉((1024 * 1024) / MCLBYTES)␉/* cl map size: 1MB */␊ |
111 | #else␊ |
112 | #define␉NMBCLUSTERS␉((1024 * 512) / MCLBYTES)␉/* cl map size: 0.5MB */␊ |
113 | #endif␊ |
114 | #endif␊ |
115 | ␊ |
116 | /*␊ |
117 | * Some macros for units conversion␊ |
118 | */␊ |
119 | /* Core clicks (NeXT_page_size bytes) to segments and vice versa */␊ |
120 | #define␉ctos(x)␉(x)␊ |
121 | #define␉stoc(x)␉(x)␊ |
122 | ␊ |
123 | /* Core clicks (4096 bytes) to disk blocks */␊ |
124 | #define␉ctod(x)␉((x)<<(PGSHIFT-DEV_BSHIFT))␊ |
125 | #define␉dtoc(x)␉((x)>>(PGSHIFT-DEV_BSHIFT))␊ |
126 | #define␉dtob(x)␉((x)<<DEV_BSHIFT)␊ |
127 | ␊ |
128 | /* clicks to bytes */␊ |
129 | #define␉ctob(x)␉((x)<<PGSHIFT)␊ |
130 | ␊ |
131 | /* bytes to clicks */␊ |
132 | #define␉btoc(x)␉(((unsigned)(x)+(NBPG-1))>>PGSHIFT)␊ |
133 | ␊ |
134 | #ifdef __APPLE__␊ |
135 | #define btodb(bytes, devBlockSize) \␊ |
136 | ((unsigned)(bytes) / devBlockSize)␊ |
137 | #define dbtob(db, devBlockSize) \␊ |
138 | ((unsigned)(db) * devBlockSize)␊ |
139 | #else␊ |
140 | #define␉btodb(bytes)␉ ␉␉/* calculates (bytes / DEV_BSIZE) */ \␊ |
141 | ␉((unsigned)(bytes) >> DEV_BSHIFT)␊ |
142 | #define␉dbtob(db)␉␉␉/* calculates (db * DEV_BSIZE) */ \␊ |
143 | ␉((unsigned)(db) << DEV_BSHIFT)␊ |
144 | #endif␊ |
145 | ␊ |
146 | /*␊ |
147 | * Map a ``block device block'' to a file system block.␊ |
148 | * This should be device dependent, and will be if we␊ |
149 | * add an entry to cdevsw/bdevsw for that purpose.␊ |
150 | * For now though just use DEV_BSIZE.␊ |
151 | */␊ |
152 | #define␉bdbtofsb(bn)␉((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))␊ |
153 | ␊ |
154 | /*␊ |
155 | * Macros to decode (and encode) processor status word.␊ |
156 | */␊ |
157 | #define STATUS_WORD(rpl, ipl)␉(((ipl) << 8) | (rpl))␊ |
158 | #define␉USERMODE(x)␉␉(((x) & 3) == 3)␊ |
159 | #define␉BASEPRI(x)␉␉(((x) & (255 << 8)) == 0)␊ |
160 | ␊ |
161 | ␊ |
162 | #if␉defined(KERNEL) || defined(STANDALONE)␊ |
163 | #define␉DELAY(n) delay(n)␊ |
164 | ␊ |
165 | #else␉/* defined(KERNEL) || defined(STANDALONE) */␊ |
166 | #define␉DELAY(n)␉{ register int N = (n); while (--N > 0); }␊ |
167 | #endif␉/* defined(KERNEL) || defined(STANDALONE) */␊ |
168 | ␊ |
169 | #endif /* _I386_PARAM_H_ */␊ |
170 | |