1.1 --- a/epoc32/include/stdapis/sys/param.h Tue Nov 24 13:55:44 2009 +0000
1.2 +++ b/epoc32/include/stdapis/sys/param.h Tue Mar 16 16:12:26 2010 +0000
1.3 @@ -1,1 +1,331 @@
1.4 -param.h
1.5 +/*-
1.6 + * Copyright (c) 1982, 1986, 1989, 1993
1.7 + * The Regents of the University of California. All rights reserved.
1.8 + * (c) UNIX System Laboratories, Inc.
1.9 + * All or some portions of this file are derived from material licensed
1.10 + * to the University of California by American Telephone and Telegraph
1.11 + * Co. or Unix System Laboratories, Inc. and are reproduced herein with
1.12 + * the permission of UNIX System Laboratories, Inc.
1.13 + *
1.14 + * Redistribution and use in source and binary forms, with or without
1.15 + * modification, are permitted provided that the following conditions
1.16 + * are met:
1.17 + * 1. Redistributions of source code must retain the above copyright
1.18 + * notice, this list of conditions and the following disclaimer.
1.19 + * 2. Redistributions in binary form must reproduce the above copyright
1.20 + * notice, this list of conditions and the following disclaimer in the
1.21 + * documentation and/or other materials provided with the distribution.
1.22 + * 4. Neither the name of the University nor the names of its contributors
1.23 + * may be used to endorse or promote products derived from this software
1.24 + * without specific prior written permission.
1.25 + *
1.26 + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1.27 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.28 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.29 + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
1.30 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.31 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.32 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.33 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.34 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.35 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.36 + * SUCH DAMAGE.
1.37 + *
1.38 + * @(#)param.h 8.3 (Berkeley) 4/4/95
1.39 + * $FreeBSD: src/sys/sys/param.h,v 1.244.2.2 2005/08/13 21:27:58 rwatson Exp $
1.40 + */
1.41 +
1.42 +#ifndef _SYS_PARAM_H_
1.43 +#define _SYS_PARAM_H_
1.44 +
1.45 +#include <sys/_null.h>
1.46 +
1.47 +#define BSD 199506 /* System version (year & month). */
1.48 +#define BSD4_3 1
1.49 +#define BSD4_4 1
1.50 +
1.51 +/*
1.52 + * __FreeBSD_version numbers are documented in the Porter's Handbook.
1.53 + * If you bump the version for any reason, you should update the documentation
1.54 + * there.
1.55 + * Currently this lives here:
1.56 + *
1.57 + * doc/en_US.ISO8859-1/books/porters-handbook/book.sgml
1.58 + *
1.59 + * scheme is: <major><two digit minor>Rxx
1.60 + * 'R' is 0 if release branch or x.0-CURRENT before RELENG_*_0
1.61 + * is created, otherwise 1.
1.62 + */
1.63 +#undef __FreeBSD_version
1.64 +#define __FreeBSD_version 600034 /* Master, propagated to newvers */
1.65 +
1.66 +#ifndef LOCORE
1.67 +#include <sys/types.h>
1.68 +#endif
1.69 +
1.70 +/*
1.71 + * Machine-independent constants (some used in following include files).
1.72 + * Redefined constants are from POSIX 1003.1 limits file.
1.73 + *
1.74 + * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
1.75 + * MAXLOGNAME should be == UT_NAMESIZE+1 (see <utmp.h>)
1.76 + */
1.77 +#include <sys/syslimits.h>
1.78 +
1.79 +#define MAXCOMLEN 19 /* max command name remembered */
1.80 +#define MAXINTERP 32 /* max interpreter file name length */
1.81 +#define MAXLOGNAME 17 /* max login name length (incl. NUL) */
1.82 +#define MAXUPRC CHILD_MAX /* max simultaneous processes */
1.83 +#define NCARGS ARG_MAX /* max bytes for an exec function */
1.84 +#define NGROUPS NGROUPS_MAX /* max number groups */
1.85 +#define NOFILE OPEN_MAX /* max open files per process */
1.86 +#define NOGROUP 65535 /* marker for empty group set member */
1.87 +#define MAXHOSTNAMELEN 256 /* max hostname size */
1.88 +#define SPECNAMELEN 63 /* max length of devicename */
1.89 +
1.90 +/* More types and definitions used throughout the kernel. */
1.91 +#ifdef _KERNEL
1.92 +#if 0
1.93 +#if (defined(BURN_BRIDGES) || __FreeBSD_version >= 600000) \
1.94 + && defined(OBSOLETE_IN_6)
1.95 +#error "This file contains obsolete code to be removed in 6.0-current"
1.96 +#endif
1.97 +#endif
1.98 +#include <sys/cdefs.h>
1.99 +#include <sys/errno.h>
1.100 +#include <sys/time.h>
1.101 +
1.102 +#ifndef __SYMBIAN32__
1.103 +#include <sys/priority.h>
1.104 +#endif //__SYMBIAN32__
1.105 +
1.106 +#define FALSE 0
1.107 +#define TRUE 1
1.108 +#endif
1.109 +
1.110 +#ifndef _KERNEL
1.111 +/* Signals. */
1.112 +#ifndef __SYMBIAN32__
1.113 +#include <sys/signal.h>
1.114 +#endif //__SYMBIAN32__
1.115 +#endif
1.116 +
1.117 +/* Machine type dependent parameters. */
1.118 +#include <machine/param.h>
1.119 +#ifndef _KERNEL
1.120 +#include <sys/limits.h>
1.121 +#endif
1.122 +
1.123 +#ifndef _NO_NAMESPACE_POLLUTION
1.124 +
1.125 +#ifndef DEV_BSHIFT
1.126 +#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
1.127 +#endif
1.128 +#define DEV_BSIZE (1<<DEV_BSHIFT)
1.129 +
1.130 +#ifndef BLKDEV_IOSIZE
1.131 +#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */
1.132 +#endif
1.133 +#ifndef DFLTPHYS
1.134 +#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
1.135 +#endif
1.136 +#ifndef MAXPHYS
1.137 +#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
1.138 +#endif
1.139 +#ifndef MAXDUMPPGS
1.140 +#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE)
1.141 +#endif
1.142 +
1.143 +/*
1.144 + * Constants related to network buffer management.
1.145 + * MCLBYTES must be no larger than PAGE_SIZE.
1.146 + */
1.147 +#ifndef MSIZE
1.148 +#define MSIZE 256 /* size of an mbuf */
1.149 +#endif /* MSIZE */
1.150 +
1.151 +#ifndef MCLSHIFT
1.152 +#define MCLSHIFT 11 /* convert bytes to mbuf clusters */
1.153 +#endif /* MCLSHIFT */
1.154 +
1.155 +#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */
1.156 +
1.157 +/*
1.158 + * Some macros for units conversion
1.159 + */
1.160 +
1.161 +/* clicks to bytes */
1.162 +#ifndef ctob
1.163 +#define ctob(x) ((x)<<PAGE_SHIFT)
1.164 +#endif
1.165 +
1.166 +/* bytes to clicks */
1.167 +#ifndef btoc
1.168 +#define btoc(x) (((vm_offset_t)(x)+PAGE_MASK)>>PAGE_SHIFT)
1.169 +#endif
1.170 +
1.171 +/*
1.172 + * btodb() is messy and perhaps slow because `bytes' may be an off_t. We
1.173 + * want to shift an unsigned type to avoid sign extension and we don't
1.174 + * want to widen `bytes' unnecessarily. Assume that the result fits in
1.175 + * a daddr_t.
1.176 + */
1.177 +#ifndef btodb
1.178 +#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
1.179 + (sizeof (bytes) > sizeof(long) \
1.180 + ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \
1.181 + : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT))
1.182 +#endif
1.183 +
1.184 +#ifndef dbtob
1.185 +#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
1.186 + ((off_t)(db) << DEV_BSHIFT)
1.187 +#endif
1.188 +
1.189 +#endif /* _NO_NAMESPACE_POLLUTION */
1.190 +
1.191 +#define PRIMASK 0x0ff
1.192 +#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */
1.193 +#define PDROP 0x200 /* OR'd with pri to stop re-entry of interlock mutex */
1.194 +
1.195 +#define NZERO 0 /* default "nice" */
1.196 +
1.197 +#define NBBY 8 /* number of bits in a byte */
1.198 +#define NBPW sizeof(int) /* number of bytes per word (integer) */
1.199 +
1.200 +#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */
1.201 +
1.202 +#define NODEV (dev_t)(-1) /* non-existent device */
1.203 +
1.204 +#define CBLOCK 128 /* Clist block size, must be a power of 2. */
1.205 +#define CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */
1.206 + /* Data chars/clist. */
1.207 +#define CBSIZE (CBLOCK - sizeof(struct cblock *) - CBQSIZE)
1.208 +#define CROUND (CBLOCK - 1) /* Clist rounding. */
1.209 +
1.210 +/*
1.211 + * File system parameters and macros.
1.212 + *
1.213 + * MAXBSIZE - Filesystems are made out of blocks of at most MAXBSIZE bytes
1.214 + * per block. MAXBSIZE may be made larger without effecting
1.215 + * any existing filesystems as long as it does not exceed MAXPHYS,
1.216 + * and may be made smaller at the risk of not being able to use
1.217 + * filesystems which require a block size exceeding MAXBSIZE.
1.218 + *
1.219 + * BKVASIZE - Nominal buffer space per buffer, in bytes. BKVASIZE is the
1.220 + * minimum KVM memory reservation the kernel is willing to make.
1.221 + * Filesystems can of course request smaller chunks. Actual
1.222 + * backing memory uses a chunk size of a page (PAGE_SIZE).
1.223 + *
1.224 + * If you make BKVASIZE too small you risk seriously fragmenting
1.225 + * the buffer KVM map which may slow things down a bit. If you
1.226 + * make it too big the kernel will not be able to optimally use
1.227 + * the KVM memory reserved for the buffer cache and will wind
1.228 + * up with too-few buffers.
1.229 + *
1.230 + * The default is 16384, roughly 2x the block size used by a
1.231 + * normal UFS filesystem.
1.232 + */
1.233 +#define MAXBSIZE 65536 /* must be power of 2 */
1.234 +#define BKVASIZE 16384 /* must be power of 2 */
1.235 +#define BKVAMASK (BKVASIZE-1)
1.236 +
1.237 +/*
1.238 + * MAXPATHLEN defines the longest permissible path length after expanding
1.239 + * symbolic links. It is used to allocate a temporary buffer from the buffer
1.240 + * pool in which to do the name expansion, hence should be a power of two,
1.241 + * and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the
1.242 + * maximum number of symbolic links that may be expanded in a path name.
1.243 + * It should be set high enough to allow all legitimate uses, but halt
1.244 + * infinite loops reasonably quickly.
1.245 + */
1.246 +#define MAXPATHLEN PATH_MAX
1.247 +#define MAXSYMLINKS 32
1.248 +
1.249 +/* Bit map related macros. */
1.250 +#define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
1.251 +#define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
1.252 +#define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
1.253 +#define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
1.254 +
1.255 +/* Macros for counting and rounding. */
1.256 +#ifndef howmany
1.257 +#define howmany(x, y) (((x)+((y)-1))/(y))
1.258 +#endif
1.259 +#define rounddown(x, y) (((x)/(y))*(y))
1.260 +#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */
1.261 +#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
1.262 +#define powerof2(x) ((((x)-1)&(x))==0)
1.263 +
1.264 +/* Macros for min/max. */
1.265 +#define MIN(a,b) (((a)<(b))?(a):(b))
1.266 +#define MAX(a,b) (((a)>(b))?(a):(b))
1.267 +
1.268 +#ifdef _KERNEL
1.269 +/*
1.270 + * Basic byte order function prototypes for non-inline functions.
1.271 + */
1.272 +#ifndef _BYTEORDER_PROTOTYPED
1.273 +#define _BYTEORDER_PROTOTYPED
1.274 +__BEGIN_DECLS
1.275 +__uint32_t htonl(__uint32_t);
1.276 +__uint16_t htons(__uint16_t);
1.277 +__uint32_t ntohl(__uint32_t);
1.278 +__uint16_t ntohs(__uint16_t);
1.279 +__END_DECLS
1.280 +#endif
1.281 +
1.282 +#ifndef lint
1.283 +#ifndef _BYTEORDER_FUNC_DEFINED
1.284 +#define _BYTEORDER_FUNC_DEFINED
1.285 +#define htonl(x) __htonl(x)
1.286 +#define htons(x) __htons(x)
1.287 +#define ntohl(x) __ntohl(x)
1.288 +#define ntohs(x) __ntohs(x)
1.289 +#endif /* !_BYTEORDER_FUNC_DEFINED */
1.290 +#endif /* lint */
1.291 +#endif /* _KERNEL */
1.292 +
1.293 +/*
1.294 + * Constants for setting the parameters of the kernel memory allocator.
1.295 + *
1.296 + * 2 ** MINBUCKET is the smallest unit of memory that will be
1.297 + * allocated. It must be at least large enough to hold a pointer.
1.298 + *
1.299 + * Units of memory less or equal to MAXALLOCSAVE will permanently
1.300 + * allocate physical memory; requests for these size pieces of
1.301 + * memory are quite fast. Allocations greater than MAXALLOCSAVE must
1.302 + * always allocate and free physical memory; requests for these
1.303 + * size allocations should be done infrequently as they will be slow.
1.304 + *
1.305 + * Constraints: PAGE_SIZE <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and
1.306 + * MAXALLOCSIZE must be a power of two.
1.307 + */
1.308 +#if defined(__alpha__) || defined(__ia64__) || defined(__sparc64__)
1.309 +#define MINBUCKET 5 /* 5 => min allocation of 32 bytes */
1.310 +#else
1.311 +#define MINBUCKET 4 /* 4 => min allocation of 16 bytes */
1.312 +#endif
1.313 +#define MAXALLOCSAVE (2 * PAGE_SIZE)
1.314 +
1.315 +/*
1.316 + * Scale factor for scaled integers used to count %cpu time and load avgs.
1.317 + *
1.318 + * The number of CPU `tick's that map to a unique `%age' can be expressed
1.319 + * by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that
1.320 + * can be calculated (assuming 32 bits) can be closely approximated using
1.321 + * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).
1.322 + *
1.323 + * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age',
1.324 + * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024.
1.325 + */
1.326 +#define FSHIFT 11 /* bits to right of fixed binary point */
1.327 +#define FSCALE (1<<FSHIFT)
1.328 +
1.329 +#define dbtoc(db) /* calculates devblks to pages */ \
1.330 + ((db + (ctodb(1) - 1)) >> (PAGE_SHIFT - DEV_BSHIFT))
1.331 +
1.332 +#define ctodb(db) /* calculates pages to devblks */ \
1.333 + ((db) << (PAGE_SHIFT - DEV_BSHIFT))
1.334 +
1.335 +#endif /* _SYS_PARAM_H_ */