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/*- |
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* SPDX-License-Identifier: BSD-3-Clause |
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* |
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* Copyright (c) 1982, 1986, 1989, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* (c) UNIX System Laboratories, Inc. |
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* All or some portions of this file are derived from material licensed |
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* to the University of California by American Telephone and Telegraph |
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with |
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* the permission of UNIX System Laboratories, Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* @(#)param.h 8.3 (Berkeley) 4/4/95 |
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* $FreeBSD$ |
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*/ |
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|
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#ifndef _SYS_PARAM_H_ |
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#define _SYS_PARAM_H_ |
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|
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#include <sys/_null.h> |
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|
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#define BSD 199506 /* System version (year & month). */ |
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#define BSD4_3 1 |
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#define BSD4_4 1 |
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|
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/* |
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* __FreeBSD_version numbers are documented in the Porter's Handbook. |
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* If you bump the version for any reason, you should update the documentation |
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* there. |
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* Currently this lives here in the doc/ repository: |
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* |
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* head/en_US.ISO8859-1/books/porters-handbook/versions/chapter.xml |
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* |
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* scheme is: <major><two digit minor>Rxx |
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* 'R' is in the range 0 to 4 if this is a release branch or |
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* X.0-CURRENT before releng/X.0 is created, otherwise 'R' is |
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* in the range 5 to 9. |
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*/ |
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#undef __FreeBSD_version |
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#define __FreeBSD_version 1300132 /* Master, propagated to newvers */ |
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|
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/* |
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* __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD, |
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* which by definition is always true on FreeBSD. This macro is also defined |
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* on other systems that use the kernel of FreeBSD, such as GNU/kFreeBSD. |
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* |
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* It is tempting to use this macro in userland code when we want to enable |
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* kernel-specific routines, and in fact it's fine to do this in code that |
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* is part of FreeBSD itself. However, be aware that as presence of this |
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* macro is still not widespread (e.g. older FreeBSD versions, 3rd party |
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* compilers, etc), it is STRONGLY DISCOURAGED to check for this macro in |
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* external applications without also checking for __FreeBSD__ as an |
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* alternative. |
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*/ |
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#undef __FreeBSD_kernel__ |
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#define __FreeBSD_kernel__ |
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|
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#if defined(_KERNEL) || defined(IN_RTLD) |
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#define P_OSREL_SIGWAIT 700000 |
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#define P_OSREL_SIGSEGV 700004 |
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#define P_OSREL_MAP_ANON 800104 |
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#define P_OSREL_MAP_FSTRICT 1100036 |
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#define P_OSREL_SHUTDOWN_ENOTCONN 1100077 |
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#define P_OSREL_MAP_GUARD 1200035 |
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#define P_OSREL_WRFSBASE 1200041 |
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#define P_OSREL_CK_CYLGRP 1200046 |
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#define P_OSREL_VMTOTAL64 1200054 |
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#define P_OSREL_CK_SUPERBLOCK 1300000 |
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#define P_OSREL_CK_INODE 1300005 |
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#define P_OSREL_POWERPC_NEW_AUX_ARGS 1300070 |
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|
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#define P_OSREL_MAJOR(x) ((x) / 100000) |
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#endif |
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|
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#ifndef LOCORE |
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#include <sys/types.h> |
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#endif |
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|
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/* |
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* Machine-independent constants (some used in following include files). |
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* Redefined constants are from POSIX 1003.1 limits file. |
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* |
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* MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>) |
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*/ |
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#include <sys/syslimits.h> |
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|
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#define MAXCOMLEN 19 /* max command name remembered */ |
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#define MAXINTERP PATH_MAX /* max interpreter file name length */ |
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#define MAXLOGNAME 33 /* max login name length (incl. NUL) */ |
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#define MAXUPRC CHILD_MAX /* max simultaneous processes */ |
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#define NCARGS ARG_MAX /* max bytes for an exec function */ |
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#define NGROUPS (NGROUPS_MAX+1) /* max number groups */ |
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#define NOFILE OPEN_MAX /* max open files per process */ |
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#define NOGROUP 65535 /* marker for empty group set member */ |
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#define MAXHOSTNAMELEN 256 /* max hostname size */ |
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#define SPECNAMELEN 255 /* max length of devicename */ |
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|
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/* More types and definitions used throughout the kernel. */ |
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#ifdef _KERNEL |
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#include <sys/cdefs.h> |
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#include <sys/errno.h> |
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#ifndef LOCORE |
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#include <sys/time.h> |
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#include <sys/priority.h> |
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#endif |
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|
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#ifndef FALSE |
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#define FALSE 0 |
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#endif |
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#ifndef TRUE |
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#define TRUE 1 |
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#endif |
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#endif |
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|
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#ifndef _KERNEL |
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#ifndef LOCORE |
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/* Signals. */ |
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#include <sys/signal.h> |
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#endif |
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#endif |
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|
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/* Machine type dependent parameters. */ |
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#include <machine/param.h> |
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#ifndef _KERNEL |
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#include <sys/limits.h> |
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#endif |
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|
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#ifndef DEV_BSHIFT |
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ |
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#endif |
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#define DEV_BSIZE (1<<DEV_BSHIFT) |
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|
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#ifndef BLKDEV_IOSIZE |
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#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ |
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#endif |
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#ifndef DFLTPHYS |
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#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ |
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#endif |
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#ifndef MAXPHYS /* max raw I/O transfer size */ |
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#ifdef __ILP32__ |
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#define MAXPHYS (128 * 1024) |
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#else |
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#define MAXPHYS (1024 * 1024) |
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#endif |
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#endif |
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#ifndef MAXDUMPPGS |
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#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) |
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#endif |
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|
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/* |
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* Constants related to network buffer management. |
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* MCLBYTES must be no larger than PAGE_SIZE. |
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*/ |
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#ifndef MSIZE |
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#define MSIZE 256 /* size of an mbuf */ |
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#endif |
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|
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#ifndef MCLSHIFT |
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#define MCLSHIFT 11 /* convert bytes to mbuf clusters */ |
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#endif /* MCLSHIFT */ |
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|
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#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */ |
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|
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#if PAGE_SIZE < 2048 |
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#define MJUMPAGESIZE MCLBYTES |
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#elif PAGE_SIZE <= 8192 |
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#define MJUMPAGESIZE PAGE_SIZE |
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#else |
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#define MJUMPAGESIZE (8 * 1024) |
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#endif |
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|
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#define MJUM9BYTES (9 * 1024) /* jumbo cluster 9k */ |
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#define MJUM16BYTES (16 * 1024) /* jumbo cluster 16k */ |
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|
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/* |
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* Some macros for units conversion |
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*/ |
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|
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/* clicks to bytes */ |
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#ifndef ctob |
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#define ctob(x) ((x)<<PAGE_SHIFT) |
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#endif |
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|
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/* bytes to clicks */ |
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#ifndef btoc |
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#define btoc(x) (((vm_offset_t)(x)+PAGE_MASK)>>PAGE_SHIFT) |
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#endif |
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|
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/* |
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* btodb() is messy and perhaps slow because `bytes' may be an off_t. We |
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* want to shift an unsigned type to avoid sign extension and we don't |
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* want to widen `bytes' unnecessarily. Assume that the result fits in |
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* a daddr_t. |
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*/ |
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#ifndef btodb |
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#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ |
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(sizeof (bytes) > sizeof(long) \ |
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? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ |
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: (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) |
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#endif |
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|
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#ifndef dbtob |
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#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ |
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((off_t)(db) << DEV_BSHIFT) |
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#endif |
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|
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#define PRIMASK 0x0ff |
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#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */ |
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#define PDROP 0x200 /* OR'd with pri to stop re-entry of interlock mutex */ |
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|
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#define NZERO 0 /* default "nice" */ |
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|
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#define NBBY 8 /* number of bits in a byte */ |
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#define NBPW sizeof(int) /* number of bytes per word (integer) */ |
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|
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#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */ |
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|
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#define NODEV (dev_t)(-1) /* non-existent device */ |
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|
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/* |
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* File system parameters and macros. |
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* |
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* MAXBSIZE - Filesystems are made out of blocks of at most MAXBSIZE bytes |
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* per block. MAXBSIZE may be made larger without effecting |
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* any existing filesystems as long as it does not exceed MAXPHYS, |
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* and may be made smaller at the risk of not being able to use |
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* filesystems which require a block size exceeding MAXBSIZE. |
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* |
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* MAXBCACHEBUF - Maximum size of a buffer in the buffer cache. This must |
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* be >= MAXBSIZE and can be set differently for different |
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* architectures by defining it in <machine/param.h>. |
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* Making this larger allows NFS to do larger reads/writes. |
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* |
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* BKVASIZE - Nominal buffer space per buffer, in bytes. BKVASIZE is the |
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* minimum KVM memory reservation the kernel is willing to make. |
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* Filesystems can of course request smaller chunks. Actual |
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* backing memory uses a chunk size of a page (PAGE_SIZE). |
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* The default value here can be overridden on a per-architecture |
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* basis by defining it in <machine/param.h>. |
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* |
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* If you make BKVASIZE too small you risk seriously fragmenting |
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* the buffer KVM map which may slow things down a bit. If you |
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* make it too big the kernel will not be able to optimally use |
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* the KVM memory reserved for the buffer cache and will wind |
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* up with too-few buffers. |
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* |
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* The default is 16384, roughly 2x the block size used by a |
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* normal UFS filesystem. |
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*/ |
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#define MAXBSIZE 65536 /* must be power of 2 */ |
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#ifndef MAXBCACHEBUF |
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#define MAXBCACHEBUF MAXBSIZE /* must be a power of 2 >= MAXBSIZE */ |
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#endif |
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#ifndef BKVASIZE |
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#define BKVASIZE 16384 /* must be power of 2 */ |
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#endif |
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#define BKVAMASK (BKVASIZE-1) |
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|
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/* |
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* MAXPATHLEN defines the longest permissible path length after expanding |
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* symbolic links. It is used to allocate a temporary buffer from the buffer |
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* pool in which to do the name expansion, hence should be a power of two, |
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* and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the |
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* maximum number of symbolic links that may be expanded in a path name. |
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* It should be set high enough to allow all legitimate uses, but halt |
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* infinite loops reasonably quickly. |
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*/ |
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#define MAXPATHLEN PATH_MAX |
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#define MAXSYMLINKS 32 |
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|
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/* Bit map related macros. */ |
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#define setbit(a,i) (((unsigned char *)(a))[(i)/NBBY] |= 1<<((i)%NBBY)) |
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#define clrbit(a,i) (((unsigned char *)(a))[(i)/NBBY] &= ~(1<<((i)%NBBY))) |
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#define isset(a,i) \ |
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(((const unsigned char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) |
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#define isclr(a,i) \ |
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((((const unsigned char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) == 0) |
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|
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/* Macros for counting and rounding. */ |
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#ifndef howmany |
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#define howmany(x, y) (((x)+((y)-1))/(y)) |
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#endif |
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#define nitems(x) (sizeof((x)) / sizeof((x)[0])) |
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#define rounddown(x, y) (((x)/(y))*(y)) |
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#define rounddown2(x, y) ((x)&(~((y)-1))) /* if y is power of two */ |
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#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */ |
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#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */ |
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#define powerof2(x) ((((x)-1)&(x))==0) |
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|
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/* Macros for min/max. */ |
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#define MIN(a,b) (((a)<(b))?(a):(b)) |
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#define MAX(a,b) (((a)>(b))?(a):(b)) |
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|
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#ifdef _KERNEL |
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/* |
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* Basic byte order function prototypes for non-inline functions. |
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*/ |
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#ifndef LOCORE |
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#ifndef _BYTEORDER_PROTOTYPED |
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#define _BYTEORDER_PROTOTYPED |
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__BEGIN_DECLS |
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__uint32_t htonl(__uint32_t); |
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__uint16_t htons(__uint16_t); |
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__uint32_t ntohl(__uint32_t); |
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__uint16_t ntohs(__uint16_t); |
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__END_DECLS |
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#endif |
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#endif |
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|
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#ifndef _BYTEORDER_FUNC_DEFINED |
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#define _BYTEORDER_FUNC_DEFINED |
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#define htonl(x) __htonl(x) |
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#define htons(x) __htons(x) |
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#define ntohl(x) __ntohl(x) |
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#define ntohs(x) __ntohs(x) |
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#endif /* !_BYTEORDER_FUNC_DEFINED */ |
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#endif /* _KERNEL */ |
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|
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/* |
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* Scale factor for scaled integers used to count %cpu time and load avgs. |
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* |
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* The number of CPU `tick's that map to a unique `%age' can be expressed |
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* by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that |
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* can be calculated (assuming 32 bits) can be closely approximated using |
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* the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15). |
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* |
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* For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age', |
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* FSHIFT must be at least 11; this gives us a maximum load avg of ~1024. |
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*/ |
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#define FSHIFT 11 /* bits to right of fixed binary point */ |
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#define FSCALE (1<<FSHIFT) |
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|
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#define dbtoc(db) /* calculates devblks to pages */ \ |
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((db + (ctodb(1) - 1)) >> (PAGE_SHIFT - DEV_BSHIFT)) |
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|
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#define ctodb(db) /* calculates pages to devblks */ \ |
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((db) << (PAGE_SHIFT - DEV_BSHIFT)) |
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|
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/* |
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* Old spelling of __containerof(). |
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*/ |
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#define member2struct(s, m, x) \ |
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((struct s *)(void *)((char *)(x) - offsetof(struct s, m))) |
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|
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/* |
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* Access a variable length array that has been declared as a fixed |
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* length array. |
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*/ |
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#define __PAST_END(array, offset) (((__typeof__(*(array)) *)(array))[offset]) |
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|
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#endif /* _SYS_PARAM_H_ */ |
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