4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* $NetBSD: param.h,v 1.244.2.9.2.2 2008/10/05 08:44:03 bouyer Exp $ */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (c) 1982, 1986, 1989, 1993
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The Regents of the University of California. All rights reserved.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * (c) UNIX System Laboratories, Inc.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * All or some portions of this file are derived from material licensed
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * to the University of California by American Telephone and Telegraph
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Co. or Unix System Laboratories, Inc. and are reproduced herein with
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * the permission of UNIX System Laboratories, Inc.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Redistribution and use in source and binary forms, with or without
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * modification, are permitted provided that the following conditions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 1. Redistributions of source code must retain the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2. Redistributions in binary form must reproduce the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer in the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * documentation and/or other materials provided with the distribution.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 3. Neither the name of the University nor the names of its contributors
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * may be used to endorse or promote products derived from this software
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * without specific prior written permission.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * SUCH DAMAGE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * @(#)param.h 8.3 (Berkeley) 4/4/95
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Historic BSD #defines -- probably will remain untouched for all time.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define BSD 199506 /* System version (year & month). */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * #define __NetBSD_Version__ MMmmrrpp00
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * M = major version
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * m = minor version; a minor number of 99 indicates current.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * r = 0 (*)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * p = patchlevel
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * When new releases are made, src/gnu/usr.bin/groff/tmac/mdoc.local
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * needs to be updated and the changes sent back to the groff maintainers.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * (*) Up to 2.0I "release" used to be "",A-Z,Z[A-Z] but numeric
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * e.g. NetBSD-1.2D = 102040000 ('D' == 4)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * NetBSD-2.0H (200080000) was changed on 20041001 to:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2.99.9 (299000900)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define __NetBSD_Version__ 400000003 /* NetBSD 4.0.1 */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define __NetBSD_Prereq__(M,m,p) (((((M) * 100000000) + \
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Historical NetBSD #define
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * NetBSD 1.4 was the last release for which this value was incremented.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The value is now permanently fixed at 199905. It will never be
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * changed again.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * New code must use __NetBSD_Version__ instead, and should not even
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * count on NetBSD being defined.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define NetBSD 199905 /* NetBSD version (year & month). */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Machine-independent constants (some used in following include files).
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Redefined constants are from POSIX 1003.1 limits file.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MAXCOMLEN 16 /* max command name remembered */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MAXINTERP PATH_MAX /* max interpreter file name length */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* DEPRECATED: use LOGIN_NAME_MAX instead. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MAXLOGNAME (LOGIN_NAME_MAX - 1) /* max login name length */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define NCARGS ARG_MAX /* max bytes for an exec function */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define NOGROUP 65535 /* marker for empty group set member */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define NOFILE OPEN_MAX /* max open files per process */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MAXUPRC CHILD_MAX /* POSIX 1003.1-compliant default */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#error MAXUPRC less than CHILD_MAX. See options(4) for details.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* (MAXUPRC - 0) < CHILD_MAX */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* !defined(MAXUPRC) */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* Signals. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* Machine type dependent parameters. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* pages ("clicks") to disk blocks */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* bytes to pages */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* bytes to disk blocks */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Stack macros. On most architectures, the stack grows down,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * towards lower addresses; it is the rare architecture where
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * it grows up, towards higher addresses.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * STACK_GROW and STACK_SHRINK adjust a stack pointer by some
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * size, no questions asked. STACK_ALIGN aligns a stack pointer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * STACK_ALLOC returns a pointer to allocated stack space of
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * some size; given such a pointer and a size, STACK_MAX gives
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * the maximum (in the "maxsaddr" sense) stack address of the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * allocated memory.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define STACK_GROW(sp, _size) (((caddr_t)(sp)) + (_size))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define STACK_SHRINK(sp, _size) (((caddr_t)(sp)) - (_size))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ((caddr_t)((((unsigned long)(sp)) + (bytes)) & ~(bytes)))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define STACK_MAX(p, _size) (((caddr_t)(p)) + (_size))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define STACK_GROW(sp, _size) (((caddr_t)(sp)) - (_size))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define STACK_SHRINK(sp, _size) (((caddr_t)(sp)) + (_size))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define STACK_ALLOC(sp, _size) (((caddr_t)(sp)) - (_size))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* defined(_KERNEL) || defined(__EXPOSE_STACK) */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Priorities. Note that with 32 run queues, differences less than 4 are
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * insignificant.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define PZERO 22 /* No longer magic, shouldn't be here. XXX */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MAXPRI 127 /* Priorities range from 0 through MAXPRI. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define PNORELOCK 0x200 /* OR'd with pri for cond_wait() to not relock
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync the interlock */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define PNOEXITERR 0x400 /* OR'd with pri for tsleep to not exit
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync with an error code when LWPs are exiting */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define NBPW sizeof(int) /* number of bytes per word (integer) */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define CBLOCK 64 /* Clist block size, must be a power of 2. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define CBSIZE (CBLOCK - (int)sizeof(struct cblock *) - CBQSIZE)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * File system parameters and macros.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The file system is made out of blocks of at most MAXBSIZE units, with
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * smaller units (fragments) only in the last direct block. MAXBSIZE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * primarily determines the size of buffers in the buffer pool. It may be
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * made larger without any effect on existing file systems; however making
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * it smaller may make some file systems unmountable.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * MAXPATHLEN defines the longest permissible path length after expanding
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * symbolic links. It is used to allocate a temporary buffer from the buffer
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * pool in which to do the name expansion, hence should be a power of two,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * maximum number of symbolic links that may be expanded in a path name.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * It should be set high enough to allow all legitimate uses, but halt
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * infinite loops reasonably quickly.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* Bit map related macros. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* Macros for counting and rounding. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync///* Macros for min/max. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync//#define MIN(a,b) (((a)<(b))?(a):(b))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync//#define MAX(a,b) (((a)>(b))?(a):(b))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Constants for setting the parameters of the kernel memory allocator.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2 ** MINBUCKET is the smallest unit of memory that will be
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * allocated. It must be at least large enough to hold a pointer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Units of memory less or equal to MAXALLOCSAVE will permanently
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * allocate physical memory; requests for these size pieces of
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * memory are quite fast. Allocations greater than MAXALLOCSAVE must
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * always allocate and free physical memory; requests for these
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * size allocations should be done infrequently as they will be slow.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Constraints: NBPG <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * MAXALLOCSAVE must be a power of two.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MINBUCKET 5 /* 5 => min allocation of 32 bytes */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MINBUCKET 4 /* 4 => min allocation of 16 bytes */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Scale factor for scaled integers used to count %cpu time and load avgs.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The number of CPU `tick's that map to a unique `%age' can be expressed
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * can be calculated (assuming 32 bits) can be closely approximated using
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age',
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define FSHIFT 11 /* bits to right of fixed binary point */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The time for a process to be blocked before being very swappable.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This is a number of seconds which the system takes as being a non-trivial
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * amount of real time. You probably shouldn't change this;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * it is used in subtle ways (fractions and multiples of it are, that is, like
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * half of a ``long time'', almost a long time, etc.)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * It is related to human patience and other factors which don't really
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * change over time.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Defaults for Unified Buffer Cache parameters.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * These may be overridden in <machine/param.h>.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * macro to convert from milliseconds to hz without integer overflow
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Default version using only 32bits arithmetics.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 64bit port can define 64bit version in their <machine/param.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 0x20000 is safe for hz < 20000
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* _KERNEL */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* !_SYS_PARAM_H_ */