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Diffstat (limited to 'rtemsbsd/include/rtems/bsd/sys/param.h')
-rw-r--r-- | rtemsbsd/include/rtems/bsd/sys/param.h | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/rtemsbsd/include/rtems/bsd/sys/param.h b/rtemsbsd/include/rtems/bsd/sys/param.h new file mode 100644 index 00000000..cd00ea4c --- /dev/null +++ b/rtemsbsd/include/rtems/bsd/sys/param.h @@ -0,0 +1,332 @@ +/*- + * Copyright (c) 1982, 1986, 1989, 1993 + * The Regents of the University of California. All rights reserved. + * (c) UNIX System Laboratories, Inc. + * All or some portions of this file are derived from material licensed + * to the University of California by American Telephone and Telegraph + * Co. or Unix System Laboratories, Inc. and are reproduced herein with + * the permission of UNIX System Laboratories, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)param.h 8.3 (Berkeley) 4/4/95 + * $FreeBSD$ + */ + +#ifndef _SYS_PARAM_HH_ +#define _SYS_PARAM_HH_ + +#include <freebsd/sys/_null.h> + +#define BSD 199506 /* System version (year & month). */ +#define BSD4_3 1 +#define BSD4_4 1 + +/* + * __FreeBSD_version numbers are documented in the Porter's Handbook. + * If you bump the version for any reason, you should update the documentation + * there. + * Currently this lives here: + * + * doc/en_US.ISO8859-1/books/porters-handbook/book.sgml + * + * scheme is: <major><two digit minor>Rxx + * 'R' is in the range 0 to 4 if this is a release branch or + * x.0-CURRENT before RELENG_*_0 is created, otherwise 'R' is + * in the range 5 to 9. + */ +#undef __FreeBSD_version +#define __FreeBSD_version 802000 /* Master, propagated to newvers */ + +#ifdef _KERNEL +#define P_OSREL_SIGSEGV 700004 +#define P_OSREL_MAP_ANON 800104 +#endif + +#ifndef LOCORE +#include <freebsd/sys/types.h> +#endif + +/* + * Machine-independent constants (some used in following include files). + * Redefined constants are from POSIX 1003.1 limits file. + * + * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>) + * MAXLOGNAME should be == UT_NAMESIZE+1 (see <utmp.h>) + */ +#include <freebsd/sys/syslimits.h> + +#define MAXCOMLEN 19 /* max command name remembered */ +#define MAXINTERP 32 /* max interpreter file name length */ +#define MAXLOGNAME 17 /* max login name length (incl. NUL) */ +#define MAXUPRC CHILD_MAX /* max simultaneous processes */ +#define NCARGS ARG_MAX /* max bytes for an exec function */ +#define NGROUPS (NGROUPS_MAX+1) /* max number groups */ +#define NOFILE OPEN_MAX /* max open files per process */ +#define NOGROUP 65535 /* marker for empty group set member */ +#define MAXHOSTNAMELEN 256 /* max hostname size */ +#define SPECNAMELEN 63 /* max length of devicename */ + +/* More types and definitions used throughout the kernel. */ +#ifdef _KERNEL +#include <freebsd/sys/cdefs.h> +#include <freebsd/sys/errno.h> +#ifndef LOCORE +#include <freebsd/sys/time.h> +#include <freebsd/sys/priority.h> +#endif + +#ifndef FALSE +#define FALSE 0 +#endif +#ifndef TRUE +#define TRUE 1 +#endif +#endif + +#ifndef _KERNEL +/* Signals. */ +#include <freebsd/sys/signal.h> +#endif + +/* Machine type dependent parameters. */ +#include <freebsd/machine/param.h> +#ifndef _KERNEL +#include <freebsd/sys/limits.h> +#endif + +#ifndef _NO_NAMESPACE_POLLUTION + +#ifndef DEV_BSHIFT +#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ +#endif +#define DEV_BSIZE (1<<DEV_BSHIFT) + +#ifndef BLKDEV_IOSIZE +#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ +#endif +#ifndef DFLTPHYS +#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ +#endif +#ifndef MAXPHYS +#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ +#endif +#ifndef MAXDUMPPGS +#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) +#endif + +/* + * Constants related to network buffer management. + * MCLBYTES must be no larger than PAGE_SIZE. + */ +#ifndef MSIZE +#define MSIZE 256 /* size of an mbuf */ +#endif /* MSIZE */ + +#ifndef MCLSHIFT +#define MCLSHIFT 11 /* convert bytes to mbuf clusters */ +#endif /* MCLSHIFT */ + +#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */ + +#define MJUMPAGESIZE PAGE_SIZE /* jumbo cluster 4k */ +#define MJUM9BYTES (9 * 1024) /* jumbo cluster 9k */ +#define MJUM16BYTES (16 * 1024) /* jumbo cluster 16k */ + +/* + * Round p (pointer or byte index) up to a correctly-aligned value + * for all data types (int, long, ...). The result is u_long and + * must be cast to any desired pointer type. + */ +#ifndef _ALIGNBYTES +#define _ALIGNBYTES (sizeof(long) - 1) +#endif +#ifndef _ALIGN +#define _ALIGN(p) (((uintptr_t)(p) + _ALIGNBYTES) &~ _ALIGNBYTES) +#endif + +/* + * Some macros for units conversion + */ + +/* clicks to bytes */ +#ifndef ctob +#define ctob(x) ((x)<<PAGE_SHIFT) +#endif + +/* bytes to clicks */ +#ifndef btoc +#define btoc(x) (((vm_offset_t)(x)+PAGE_MASK)>>PAGE_SHIFT) +#endif + +/* + * btodb() is messy and perhaps slow because `bytes' may be an off_t. We + * want to shift an unsigned type to avoid sign extension and we don't + * want to widen `bytes' unnecessarily. Assume that the result fits in + * a daddr_t. + */ +#ifndef btodb +#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ + (sizeof (bytes) > sizeof(long) \ + ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ + : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) +#endif + +#ifndef dbtob +#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ + ((off_t)(db) << DEV_BSHIFT) +#endif + +#endif /* _NO_NAMESPACE_POLLUTION */ + +#define PRIMASK 0x0ff +#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */ +#define PDROP 0x200 /* OR'd with pri to stop re-entry of interlock mutex */ +#define PBDRY 0x400 /* for PCATCH stop is done on the user boundary */ + +#define NZERO 0 /* default "nice" */ + +#define NBBY 8 /* number of bits in a byte */ +#define NBPW sizeof(int) /* number of bytes per word (integer) */ + +#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */ + +#define NODEV (dev_t)(-1) /* non-existent device */ + +/* + * File system parameters and macros. + * + * MAXBSIZE - Filesystems are made out of blocks of at most MAXBSIZE bytes + * per block. MAXBSIZE may be made larger without effecting + * any existing filesystems as long as it does not exceed MAXPHYS, + * and may be made smaller at the risk of not being able to use + * filesystems which require a block size exceeding MAXBSIZE. + * + * BKVASIZE - Nominal buffer space per buffer, in bytes. BKVASIZE is the + * minimum KVM memory reservation the kernel is willing to make. + * Filesystems can of course request smaller chunks. Actual + * backing memory uses a chunk size of a page (PAGE_SIZE). + * + * If you make BKVASIZE too small you risk seriously fragmenting + * the buffer KVM map which may slow things down a bit. If you + * make it too big the kernel will not be able to optimally use + * the KVM memory reserved for the buffer cache and will wind + * up with too-few buffers. + * + * The default is 16384, roughly 2x the block size used by a + * normal UFS filesystem. + */ +#define MAXBSIZE 65536 /* must be power of 2 */ +#define BKVASIZE 16384 /* must be power of 2 */ +#define BKVAMASK (BKVASIZE-1) + +/* + * MAXPATHLEN defines the longest permissible path length after expanding + * symbolic links. It is used to allocate a temporary buffer from the buffer + * pool in which to do the name expansion, hence should be a power of two, + * and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the + * maximum number of symbolic links that may be expanded in a path name. + * It should be set high enough to allow all legitimate uses, but halt + * infinite loops reasonably quickly. + */ +#define MAXPATHLEN PATH_MAX +#define MAXSYMLINKS 32 + +/* Bit map related macros. */ +#define setbit(a,i) (((unsigned char *)(a))[(i)/NBBY] |= 1<<((i)%NBBY)) +#define clrbit(a,i) (((unsigned char *)(a))[(i)/NBBY] &= ~(1<<((i)%NBBY))) +#define isset(a,i) \ + (((const unsigned char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) +#define isclr(a,i) \ + ((((const unsigned char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) == 0) + +/* Macros for counting and rounding. */ +#ifndef howmany +#define howmany(x, y) (((x)+((y)-1))/(y)) +#endif +#define rounddown(x, y) (((x)/(y))*(y)) +#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */ +#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */ +#define powerof2(x) ((((x)-1)&(x))==0) + +/* Macros for min/max. */ +#define MIN(a,b) (((a)<(b))?(a):(b)) +#define MAX(a,b) (((a)>(b))?(a):(b)) + +#ifdef _KERNEL +/* + * Basic byte order function prototypes for non-inline functions. + */ +#ifndef LOCORE +#ifndef _BYTEORDER_PROTOTYPED +#define _BYTEORDER_PROTOTYPED +__BEGIN_DECLS +__uint32_t htonl(__uint32_t); +__uint16_t htons(__uint16_t); +__uint32_t ntohl(__uint32_t); +__uint16_t ntohs(__uint16_t); +__END_DECLS +#endif +#endif + +#ifndef lint +#ifndef _BYTEORDER_FUNC_DEFINED +#define _BYTEORDER_FUNC_DEFINED +#define htonl(x) __htonl(x) +#define htons(x) __htons(x) +#define ntohl(x) __ntohl(x) +#define ntohs(x) __ntohs(x) +#endif /* !_BYTEORDER_FUNC_DEFINED */ +#endif /* lint */ +#endif /* _KERNEL */ + +/* + * Scale factor for scaled integers used to count %cpu time and load avgs. + * + * The number of CPU `tick's that map to a unique `%age' can be expressed + * by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that + * can be calculated (assuming 32 bits) can be closely approximated using + * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15). + * + * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age', + * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024. + */ +#define FSHIFT 11 /* bits to right of fixed binary point */ +#define FSCALE (1<<FSHIFT) + +#define dbtoc(db) /* calculates devblks to pages */ \ + ((db + (ctodb(1) - 1)) >> (PAGE_SHIFT - DEV_BSHIFT)) + +#define ctodb(db) /* calculates pages to devblks */ \ + ((db) << (PAGE_SHIFT - DEV_BSHIFT)) + +/* + * Given the pointer x to the member m of the struct s, return + * a pointer to the containing structure. + */ +#define member2struct(s, m, x) \ + ((struct s *)(void *)((char *)(x) - offsetof(struct s, m))) + +#endif /* _SYS_PARAM_HH_ */ |