| 1 | /*- |
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| 2 | * Copyright (c) 1982, 1986, 1989, 1993 |
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| 3 | * The Regents of the University of California. All rights reserved. |
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| 4 | * (c) UNIX System Laboratories, Inc. |
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| 5 | * All or some portions of this file are derived from material licensed |
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| 6 | * to the University of California by American Telephone and Telegraph |
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| 7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
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| 8 | * the permission of UNIX System Laboratories, Inc. |
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| 9 | * |
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| 10 | * Redistribution and use in source and binary forms, with or without |
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| 11 | * modification, are permitted provided that the following conditions |
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| 12 | * are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * 4. Neither the name of the University nor the names of its contributors |
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| 19 | * may be used to endorse or promote products derived from this software |
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| 20 | * without specific prior written permission. |
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| 21 | * |
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 32 | * SUCH DAMAGE. |
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| 33 | * |
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| 34 | * @(#)param.h 8.3 (Berkeley) 4/4/95 |
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| 35 | * $FreeBSD$ |
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| 36 | */ |
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| 37 | |
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| 38 | #ifndef _RTEMS_BSD_SYS_PARAM_H_ |
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| 39 | #define _RTEMS_BSD_SYS_PARAM_H_ |
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| 40 | |
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| 41 | #ifdef __rtems__ |
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| 42 | #include <sys/param.h> |
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| 43 | #endif /* __rtems__ */ |
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| 44 | #include <sys/_null.h> |
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| 45 | |
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| 46 | #define BSD 199506 /* System version (year & month). */ |
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| 47 | #define BSD4_3 1 |
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| 48 | #define BSD4_4 1 |
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| 49 | |
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| 50 | /* |
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| 51 | * __FreeBSD_version numbers are documented in the Porter's Handbook. |
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| 52 | * If you bump the version for any reason, you should update the documentation |
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| 53 | * there. |
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| 54 | * Currently this lives here: |
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| 55 | * |
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| 56 | * doc/en_US.ISO8859-1/books/porters-handbook/book.sgml |
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| 57 | * |
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| 58 | * scheme is: <major><two digit minor>Rxx |
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| 59 | * 'R' is in the range 0 to 4 if this is a release branch or |
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| 60 | * x.0-CURRENT before RELENG_*_0 is created, otherwise 'R' is |
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| 61 | * in the range 5 to 9. |
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| 62 | */ |
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| 63 | #undef __FreeBSD_version |
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| 64 | #define __FreeBSD_version 802000 /* Master, propagated to newvers */ |
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| 65 | |
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| 66 | #ifdef _KERNEL |
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| 67 | #define P_OSREL_SIGSEGV 700004 |
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| 68 | #define P_OSREL_MAP_ANON 800104 |
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| 69 | #endif |
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| 70 | |
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| 71 | #ifndef LOCORE |
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| 72 | #include <rtems/bsd/sys/types.h> |
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| 73 | #endif |
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| 74 | |
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| 75 | /* |
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| 76 | * Machine-independent constants (some used in following include files). |
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| 77 | * Redefined constants are from POSIX 1003.1 limits file. |
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| 78 | * |
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| 79 | * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>) |
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| 80 | * MAXLOGNAME should be == UT_NAMESIZE+1 (see <utmp.h>) |
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| 81 | */ |
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| 82 | #include <sys/syslimits.h> |
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| 83 | |
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| 84 | #define MAXCOMLEN 19 /* max command name remembered */ |
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| 85 | #define MAXINTERP PATH_MAX /* max interpreter file name length */ |
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| 86 | #define MAXLOGNAME 33 /* max login name length (incl. NUL) */ |
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| 87 | #define MAXUPRC CHILD_MAX /* max simultaneous processes */ |
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| 88 | #define NCARGS ARG_MAX /* max bytes for an exec function */ |
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| 89 | #define NGROUPS (NGROUPS_MAX+1) /* max number groups */ |
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| 90 | #define NOFILE OPEN_MAX /* max open files per process */ |
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| 91 | #define NOGROUP 65535 /* marker for empty group set member */ |
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| 92 | #define MAXHOSTNAMELEN 256 /* max hostname size */ |
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| 93 | #define SPECNAMELEN 63 /* max length of devicename */ |
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| 94 | |
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| 95 | /* More types and definitions used throughout the kernel. */ |
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| 96 | #ifdef _KERNEL |
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| 97 | #include <sys/cdefs.h> |
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| 98 | #include <rtems/bsd/sys/errno.h> |
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| 99 | #ifndef LOCORE |
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| 100 | #include <rtems/bsd/sys/time.h> |
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| 101 | #include <sys/priority.h> |
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| 102 | #endif |
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| 103 | |
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| 104 | #ifndef FALSE |
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| 105 | #define FALSE 0 |
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| 106 | #endif |
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| 107 | #ifndef TRUE |
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| 108 | #define TRUE 1 |
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| 109 | #endif |
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| 110 | #endif |
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| 111 | |
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| 112 | #ifndef _KERNEL |
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| 113 | /* Signals. */ |
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| 114 | #include <sys/signal.h> |
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| 115 | #endif |
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| 116 | |
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| 117 | /* Machine type dependent parameters. */ |
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| 118 | #include <machine/rtems-bsd-param.h> |
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| 119 | #ifndef _KERNEL |
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| 120 | #include <sys/limits.h> |
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| 121 | #endif |
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| 122 | |
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| 123 | #ifndef _NO_NAMESPACE_POLLUTION |
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| 124 | |
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| 125 | #ifndef DEV_BSHIFT |
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| 126 | #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ |
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| 127 | #endif |
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| 128 | #define DEV_BSIZE (1<<DEV_BSHIFT) |
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| 129 | |
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| 130 | #ifndef BLKDEV_IOSIZE |
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| 131 | #define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ |
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| 132 | #endif |
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| 133 | #ifndef DFLTPHYS |
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| 134 | #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ |
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| 135 | #endif |
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| 136 | #ifndef MAXPHYS |
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| 137 | #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ |
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| 138 | #endif |
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| 139 | #ifndef MAXDUMPPGS |
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| 140 | #define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) |
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| 141 | #endif |
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| 142 | |
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| 143 | /* |
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| 144 | * Constants related to network buffer management. |
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| 145 | * MCLBYTES must be no larger than PAGE_SIZE. |
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| 146 | */ |
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| 147 | #ifndef MSIZE |
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| 148 | #define MSIZE 256 /* size of an mbuf */ |
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| 149 | #endif /* MSIZE */ |
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| 150 | |
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| 151 | #ifndef MCLSHIFT |
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| 152 | #define MCLSHIFT 11 /* convert bytes to mbuf clusters */ |
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| 153 | #endif /* MCLSHIFT */ |
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| 154 | |
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| 155 | #define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */ |
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| 156 | |
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| 157 | #define MJUMPAGESIZE PAGE_SIZE /* jumbo cluster 4k */ |
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| 158 | #define MJUM9BYTES (9 * 1024) /* jumbo cluster 9k */ |
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| 159 | #define MJUM16BYTES (16 * 1024) /* jumbo cluster 16k */ |
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| 160 | |
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| 161 | /* |
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| 162 | * Round p (pointer or byte index) up to a correctly-aligned value |
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| 163 | * for all data types (int, long, ...). The result is u_long and |
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| 164 | * must be cast to any desired pointer type. |
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| 165 | */ |
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| 166 | #ifndef _ALIGNBYTES |
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| 167 | #define _ALIGNBYTES (sizeof(long) - 1) |
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| 168 | #endif |
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| 169 | #ifndef _ALIGN |
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| 170 | #define _ALIGN(p) (((uintptr_t)(p) + _ALIGNBYTES) &~ _ALIGNBYTES) |
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| 171 | #endif |
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| 172 | |
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| 173 | /* |
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| 174 | * Some macros for units conversion |
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| 175 | */ |
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| 176 | |
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| 177 | /* clicks to bytes */ |
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| 178 | #ifndef ctob |
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| 179 | #define ctob(x) ((x)<<PAGE_SHIFT) |
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| 180 | #endif |
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| 181 | |
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| 182 | /* bytes to clicks */ |
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| 183 | #ifndef btoc |
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| 184 | #define btoc(x) (((vm_offset_t)(x)+PAGE_MASK)>>PAGE_SHIFT) |
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| 185 | #endif |
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| 186 | |
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| 187 | /* |
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| 188 | * btodb() is messy and perhaps slow because `bytes' may be an off_t. We |
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| 189 | * want to shift an unsigned type to avoid sign extension and we don't |
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| 190 | * want to widen `bytes' unnecessarily. Assume that the result fits in |
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| 191 | * a daddr_t. |
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| 192 | */ |
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| 193 | #ifndef btodb |
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| 194 | #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ |
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| 195 | (sizeof (bytes) > sizeof(long) \ |
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| 196 | ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ |
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| 197 | : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) |
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| 198 | #endif |
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| 199 | |
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| 200 | #ifndef dbtob |
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| 201 | #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ |
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| 202 | ((off_t)(db) << DEV_BSHIFT) |
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| 203 | #endif |
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| 204 | |
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| 205 | #endif /* _NO_NAMESPACE_POLLUTION */ |
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| 206 | |
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| 207 | #define PRIMASK 0x0ff |
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| 208 | #define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */ |
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| 209 | #define PDROP 0x200 /* OR'd with pri to stop re-entry of interlock mutex */ |
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| 210 | #define PBDRY 0x400 /* for PCATCH stop is done on the user boundary */ |
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| 211 | |
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| 212 | #define NZERO 0 /* default "nice" */ |
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| 213 | |
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| 214 | #define NBBY 8 /* number of bits in a byte */ |
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| 215 | #define NBPW sizeof(int) /* number of bytes per word (integer) */ |
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| 216 | |
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| 217 | #define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */ |
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| 218 | |
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| 219 | #define NODEV (dev_t)(-1) /* non-existent device */ |
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| 220 | |
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| 221 | /* |
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| 222 | * File system parameters and macros. |
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| 223 | * |
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| 224 | * MAXBSIZE - Filesystems are made out of blocks of at most MAXBSIZE bytes |
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| 225 | * per block. MAXBSIZE may be made larger without effecting |
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| 226 | * any existing filesystems as long as it does not exceed MAXPHYS, |
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| 227 | * and may be made smaller at the risk of not being able to use |
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| 228 | * filesystems which require a block size exceeding MAXBSIZE. |
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| 229 | * |
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| 230 | * BKVASIZE - Nominal buffer space per buffer, in bytes. BKVASIZE is the |
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| 231 | * minimum KVM memory reservation the kernel is willing to make. |
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| 232 | * Filesystems can of course request smaller chunks. Actual |
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| 233 | * backing memory uses a chunk size of a page (PAGE_SIZE). |
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| 234 | * |
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| 235 | * If you make BKVASIZE too small you risk seriously fragmenting |
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| 236 | * the buffer KVM map which may slow things down a bit. If you |
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| 237 | * make it too big the kernel will not be able to optimally use |
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| 238 | * the KVM memory reserved for the buffer cache and will wind |
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| 239 | * up with too-few buffers. |
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| 240 | * |
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| 241 | * The default is 16384, roughly 2x the block size used by a |
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| 242 | * normal UFS filesystem. |
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| 243 | */ |
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| 244 | #define MAXBSIZE 65536 /* must be power of 2 */ |
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| 245 | #define BKVASIZE 16384 /* must be power of 2 */ |
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| 246 | #define BKVAMASK (BKVASIZE-1) |
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| 247 | |
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| 248 | /* |
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| 249 | * MAXPATHLEN defines the longest permissible path length after expanding |
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| 250 | * symbolic links. It is used to allocate a temporary buffer from the buffer |
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| 251 | * pool in which to do the name expansion, hence should be a power of two, |
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| 252 | * and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the |
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| 253 | * maximum number of symbolic links that may be expanded in a path name. |
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| 254 | * It should be set high enough to allow all legitimate uses, but halt |
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| 255 | * infinite loops reasonably quickly. |
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| 256 | */ |
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| 257 | #define MAXPATHLEN PATH_MAX |
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| 258 | #define MAXSYMLINKS 32 |
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| 259 | |
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| 260 | /* Bit map related macros. */ |
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| 261 | #define setbit(a,i) (((unsigned char *)(a))[(i)/NBBY] |= 1<<((i)%NBBY)) |
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| 262 | #define clrbit(a,i) (((unsigned char *)(a))[(i)/NBBY] &= ~(1<<((i)%NBBY))) |
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| 263 | #define isset(a,i) \ |
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| 264 | (((const unsigned char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) |
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| 265 | #define isclr(a,i) \ |
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| 266 | ((((const unsigned char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) == 0) |
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| 267 | |
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| 268 | /* Macros for counting and rounding. */ |
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| 269 | #ifndef howmany |
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| 270 | #define howmany(x, y) (((x)+((y)-1))/(y)) |
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| 271 | #endif |
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| 272 | #define nitems(x) (sizeof((x)) / sizeof((x)[0])) |
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| 273 | #define rounddown(x, y) (((x)/(y))*(y)) |
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| 274 | #define rounddown2(x, y) ((x)&(~((y)-1))) /* if y is power of two */ |
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| 275 | #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */ |
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| 276 | #define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */ |
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| 277 | #define powerof2(x) ((((x)-1)&(x))==0) |
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| 278 | |
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| 279 | /* Macros for min/max. */ |
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| 280 | #define MIN(a,b) (((a)<(b))?(a):(b)) |
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| 281 | #define MAX(a,b) (((a)>(b))?(a):(b)) |
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| 282 | |
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| 283 | #ifdef _KERNEL |
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| 284 | /* |
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| 285 | * Basic byte order function prototypes for non-inline functions. |
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| 286 | */ |
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| 287 | #ifndef LOCORE |
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| 288 | #ifndef _BYTEORDER_PROTOTYPED |
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| 289 | #define _BYTEORDER_PROTOTYPED |
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| 290 | __BEGIN_DECLS |
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| 291 | __uint32_t htonl(__uint32_t); |
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| 292 | __uint16_t htons(__uint16_t); |
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| 293 | __uint32_t ntohl(__uint32_t); |
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| 294 | __uint16_t ntohs(__uint16_t); |
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| 295 | __END_DECLS |
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| 296 | #endif |
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| 297 | #endif |
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| 298 | |
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| 299 | #ifndef lint |
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| 300 | #ifndef _BYTEORDER_FUNC_DEFINED |
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| 301 | #define _BYTEORDER_FUNC_DEFINED |
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| 302 | #define htonl(x) __htonl(x) |
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| 303 | #define htons(x) __htons(x) |
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| 304 | #define ntohl(x) __ntohl(x) |
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| 305 | #define ntohs(x) __ntohs(x) |
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| 306 | #endif /* !_BYTEORDER_FUNC_DEFINED */ |
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| 307 | #endif /* lint */ |
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| 308 | #endif /* _KERNEL */ |
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| 309 | |
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| 310 | /* |
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| 311 | * Scale factor for scaled integers used to count %cpu time and load avgs. |
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| 312 | * |
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| 313 | * The number of CPU `tick's that map to a unique `%age' can be expressed |
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| 314 | * by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that |
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| 315 | * can be calculated (assuming 32 bits) can be closely approximated using |
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| 316 | * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15). |
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| 317 | * |
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| 318 | * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age', |
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| 319 | * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024. |
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| 320 | */ |
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| 321 | #define FSHIFT 11 /* bits to right of fixed binary point */ |
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| 322 | #define FSCALE (1<<FSHIFT) |
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| 323 | |
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| 324 | #define dbtoc(db) /* calculates devblks to pages */ \ |
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| 325 | ((db + (ctodb(1) - 1)) >> (PAGE_SHIFT - DEV_BSHIFT)) |
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| 326 | |
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| 327 | #define ctodb(db) /* calculates pages to devblks */ \ |
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| 328 | ((db) << (PAGE_SHIFT - DEV_BSHIFT)) |
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| 329 | |
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| 330 | /* |
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| 331 | * Given the pointer x to the member m of the struct s, return |
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| 332 | * a pointer to the containing structure. |
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| 333 | */ |
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| 334 | #define member2struct(s, m, x) \ |
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| 335 | ((struct s *)(void *)((char *)(x) - offsetof(struct s, m))) |
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| 336 | |
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| 337 | #endif /* _RTEMS_BSD_SYS_PARAM_H_ */ |
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