1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/* $OpenBSD: param.h,v 1.130 2020/04/05 06:34:20 deraadt Exp $ */
/*-
* Copyright (c) 1982, 1986, 1989, 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. 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.
*/
#ifndef _SYS_PARAM_H_
#define _SYS_PARAM_H_
#define BSD 199306 /* System version (year & month). */
#define BSD4_3 1
#define BSD4_4 1
#define OpenBSD 202005 /* OpenBSD version (year & month). */
#define OpenBSD6_7 1 /* OpenBSD 6.7 */
#include <sys/_null.h>
#ifndef _LOCORE
#include <sys/types.h>
#endif
/*
* Machine-independent constants (some used in following include files).
* Redefined constants are from POSIX 1003.1 limits file.
*
* MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
* MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
*/
#include <sys/syslimits.h>
#define MAXCOMLEN 16 /* max command name remembered */
#define MAXINTERP 128 /* max interpreter file name length */
#define MAXLOGNAME LOGIN_NAME_MAX /* max login name length w/ NUL */
#define MAXUPRC CHILD_MAX /* max simultaneous processes */
#define NCARGS ARG_MAX /* max bytes for an exec function */
#define NGROUPS NGROUPS_MAX /* max number groups */
#define NOFILE OPEN_MAX /* max open files per process (soft) */
#define NOFILE_MAX 1024 /* max open files per process (hard) */
#define NOGROUP 65535 /* marker for empty group set member */
#define MAXHOSTNAMELEN 256 /* max hostname length w/ NUL */
/* More types and definitions used throughout the kernel. */
#ifdef _KERNEL
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/ucred.h>
#include <sys/uio.h>
#include <sys/srp.h>
#endif
/* Signals. */
#include <sys/signal.h>
/* Machine type dependent parameters. */
#include <sys/limits.h>
#include <machine/param.h>
#ifdef _KERNEL
/*
* Priorities. Note that with 32 run queues, differences less than 4 are
* insignificant.
*/
#define PSWP 0
#define PVM 4
#define PINOD 8
#define PRIBIO 16
#define PVFS 20
#endif /* _KERNEL */
#define PZERO 22 /* No longer magic, shouldn't be here. XXX */
#ifdef _KERNEL
#define PSOCK 24
#define PWAIT 32
#define PLOCK 36
#define PPAUSE 40
#define PUSER 50
#define MAXPRI 127 /* Priorities range from 0 through MAXPRI. */
#define PRIMASK 0x0ff
#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */
#define PNORELOCK 0x200 /* OR'd with pri for msleep to not reaquire
the mutex */
#endif /* _KERNEL */
#define NODEV (dev_t)(-1) /* non-existent device */
#define ALIGNBYTES _ALIGNBYTES
#define ALIGN(p) _ALIGN(p)
#define ALIGNED_POINTER(p,t) _ALIGNED_POINTER(p,t)
/*
* File system parameters and macros.
*
* The file system is made out of blocks of at most MAXBSIZE units, with
* smaller units (fragments) only in the last direct block. MAXBSIZE
* primarily determines the size of buffers in the buffer pool. It may be
* made larger without any effect on existing file systems; however making
* it smaller makes some file systems unmountable.
*/
#ifdef _KERNEL
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#endif /* _KERNEL */
#define MAXBSIZE (64 * 1024)
#define _DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << _DEV_BSHIFT)
#ifdef _KERNEL
#define DEV_BSHIFT _DEV_BSHIFT
#define BLKDEV_IOSIZE PAGE_SIZE
#endif /* _KERNEL */
/* pages to disk blocks */
#ifndef ctod
#define ctod(x) ((x) << (PAGE_SHIFT - _DEV_BSHIFT))
#endif
#ifndef dtoc
#define dtoc(x) ((x) >> (PAGE_SHIFT - _DEV_BSHIFT))
#endif
/* bytes to disk blocks */
#ifndef btodb
#define btodb(x) ((x) >> _DEV_BSHIFT)
#endif
#ifndef dbtob
#define dbtob(x) ((x) << _DEV_BSHIFT)
#endif
/*
* MAXPATHLEN defines the longest permissible path length after expanding
* symbolic links. It is used to allocate a temporary buffer from the buffer
* pool in which to do the name expansion, hence should be a power of two,
* and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the
* maximum number of symbolic links that may be expanded in a path name.
* It should be set high enough to allow all legitimate uses, but halt
* infinite loops reasonably quickly.
*/
#define MAXPATHLEN PATH_MAX
#define MAXSYMLINKS SYMLOOP_MAX
/* Macros to set/clear/test flags. */
#ifdef _KERNEL
#define SET(t, f) ((t) |= (f))
#define CLR(t, f) ((t) &= ~(f))
#define ISSET(t, f) ((t) & (f))
#endif /* _KERNEL */
/* Bit map related macros. */
#define setbit(a,i) ((a)[(i)>>3] |= 1<<((i)&(NBBY-1)))
#define clrbit(a,i) ((a)[(i)>>3] &= ~(1<<((i)&(NBBY-1))))
#define isset(a,i) ((a)[(i)>>3] & (1<<((i)&(NBBY-1))))
#define isclr(a,i) (((a)[(i)>>3] & (1<<((i)&(NBBY-1)))) == 0)
/* Macros for counting and rounding. */
#ifndef howmany
#define howmany(x, y) (((x)+((y)-1))/(y))
#endif
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
#define powerof2(x) ((((x)-1)&(x))==0)
/* Macros for min/max. */
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
/* Macros for calculating the offset of a field */
#if !defined(offsetof) && defined(_KERNEL)
#if __GNUC_PREREQ__(4, 0)
#define offsetof(s, e) __builtin_offsetof(s, e)
#else
#define offsetof(s, e) ((size_t)&((s *)0)->e)
#endif
#endif /* !defined(offsetof) && defined(_KERNEL) */
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
/*
* Scale factor for scaled integers used to count %cpu time and load avgs.
*
* The number of CPU `tick's that map to a unique `%age' can be expressed
* by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that
* can be calculated (assuming 32 bits) can be closely approximated using
* the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).
*
* For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age',
* FSHIFT must be at least 11; this gives us a maximum load avg of ~1024.
*/
#define _FSHIFT 11 /* bits to right of fixed binary point */
#ifdef _KERNEL
#define FSHIFT _FSHIFT
#endif
#define FSCALE (1<<_FSHIFT)
#endif /* !_SYS_PARAM_H_ */
|
