param.h revision ae115bc77f6fcde83175c75b4206dc2e50747966
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#ifndef _SYS_PARAM_H
#define _SYS_PARAM_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifndef _ASM /* Avoid typedef headaches for assembly files */
#include <sys/types.h>
#include <sys/isa_defs.h>
#endif /* _ASM */
#ifdef __cplusplus
extern "C" {
#endif
/*
* Fundamental variables; don't change too often.
*/
/*
* _POSIX_VDISABLE has historically been defined in <sys/param.h> since
* an early merge with AT&T source. It has also historically been defined
* in <sys/termios.h>. The POSIX standard, IEEE Std. 1003.1-1988 initially
* required the existence of _POSIX_VDISABLE in <sys/termios.h>.
* Subsequent versions of the IEEE Standard as well as the X/Open
* specifications required that _POSIX_VDISABLE be defined in <unistd.h>
* while still allowing for it's existence in other headers. With the
* introduction of XPG6, _POSIX_VDISABLE can only be defined in <unistd.h>.
*/
#if !defined(_XPG6) || defined(__EXTENSIONS__)
#ifndef _POSIX_VDISABLE
#define _POSIX_VDISABLE 0 /* Disable special character functions */
#endif
#endif /* !defined(_XPG6) || defined(__EXTENSIONS__) */
#ifndef MAX_INPUT
#define MAX_INPUT 512 /* Maximum bytes stored in the input queue */
#endif
#ifndef MAX_CANON
#define MAX_CANON 256 /* Maximum bytes for canonical processing */
#endif
#define UID_NOBODY 60001 /* user ID no body */
#define GID_NOBODY UID_NOBODY
#define UID_NOACCESS 60002 /* user ID no access */
#ifdef _KERNEL
#define MAX_TASKID 999999
#define MAX_MAXPID 999999
#endif
#ifdef DEBUG
#define DEFAULT_MAXPID 999999
#define DEFAULT_JUMPPID 100000
#else
#define DEFAULT_MAXPID 30000
#define DEFAULT_JUMPPID 0
#endif
#define MAXUID 2147483647 /* max user id */
#define MAXPROJID MAXUID /* max project id */
#define MAXLINK 32767 /* max links */
#define NMOUNT 40 /* est. of # mountable fs for quota calc */
#define CANBSIZ 256 /* max size of typewriter line */
#define NOFILE 20 /* this define is here for */
/* compatibility purposes only */
/* and will be removed in a */
/* later release */
/*
* These define the maximum and minimum allowable values of the
* configurable parameter NGROUPS_MAX.
*/
#define NGROUPS_UMIN 0
#define NGROUPS_UMAX 32
/*
* NGROUPS_MAX_DEFAULT: *MUST* match NGROUPS_MAX value in limits.h.
* Remember that the NFS protocol must rev. before this can be increased
*/
#define NGROUPS_MAX_DEFAULT 16
/*
* Default process priority. Keep it in sync with limits.h.
*/
#define NZERO 20
/*
* Fundamental constants of the implementation--cannot be changed easily.
*/
#define NBPW sizeof (int) /* number of bytes in an integer */
#ifndef NULL
#if defined(_LP64)
#define NULL 0L
#else
#define NULL 0
#endif
#endif
#define CMASK 022 /* default mask for file creation */
#define CDLIMIT (1L<<11) /* default max write address */
#define NBPS 0x20000 /* Number of bytes per segment */
#define NBPSCTR 512 /* Bytes per disk sector. */
#define UBSIZE 512 /* unix block size. */
#define SCTRSHFT 9 /* Shift for BPSECT. */
#ifdef _LITTLE_ENDIAN
#define lobyte(X) (((unsigned char *)&(X))[0])
#define hibyte(X) (((unsigned char *)&(X))[1])
#define loword(X) (((ushort_t *)&(X))[0])
#define hiword(X) (((ushort_t *)&(X))[1])
#endif
#ifdef _BIG_ENDIAN
#define lobyte(X) (((unsigned char *)&(X))[1])
#define hibyte(X) (((unsigned char *)&(X))[0])
#define loword(X) (((ushort_t *)&(X))[1])
#define hiword(X) (((ushort_t *)&(X))[0])
#endif
/* REMOTE -- whether machine is primary, secondary, or regular */
#define SYSNAME 9 /* # chars in system name */
#define PREMOTE 39
/*
* MAXPATHLEN defines the longest permissible path length,
* including the terminating null, after expanding symbolic links.
* TYPICALMAXPATHLEN is used in a few places as an optimization
* with a local buffer on the stack to avoid kmem_alloc().
* 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.
* MAXNAMELEN is the length (including the terminating null) of
* the longest permissible file (component) name.
*/
#define MAXPATHLEN 1024
#define TYPICALMAXPATHLEN 64
#define MAXSYMLINKS 20
#define MAXNAMELEN 256
#ifndef NADDR
#define NADDR 13
#endif
/*
* The following are defined to be the same as
* defined in /usr/include/limits.h. They are
* needed for pipe and FIFO compatibility.
*/
#ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */
#define PIPE_BUF 5120
#endif /* PIPE_BUF */
#ifndef PIPE_MAX /* max # bytes written to a pipe in a write */
#define PIPE_MAX 5120
#endif /* PIPE_MAX */
#ifndef NBBY
#define NBBY 8 /* number of bits per byte */
#endif
/* macros replacing interleaving functions */
#define dkblock(bp) ((bp)->b_blkno)
#define dkunit(bp) (minor((bp)->b_dev) >> 3)
/*
* File system parameters and macros.
*
* The file system is made out of blocks of at most MAXBSIZE units,
* with smaller units (fragments) only in the last direct block.
* MAXBSIZE primarily determines the size of buffers in the buffer
* pool. It may be made larger without any effect on existing
* file systems; however making it smaller make make some file
* systems unmountable.
*
* Note that the blocked devices are assumed to have DEV_BSIZE
* "sectors" and that fragments must be some multiple of this size.
*/
#define MAXBSIZE 8192
#define DEV_BSIZE 512
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define MAXFRAG 8
#ifdef _SYSCALL32
#define MAXOFF32_T 0x7fffffff
#endif
#ifdef _LP64
#define MAXOFF_T 0x7fffffffffffffffl
#define MAXOFFSET_T 0x7fffffffffffffffl
#else
#define MAXOFF_T 0x7fffffffl
#ifdef _LONGLONG_TYPE
#define MAXOFFSET_T 0x7fffffffffffffffLL
#else
#define MAXOFFSET_T 0x7fffffff
#endif
#endif /* _LP64 */
#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
((unsigned long)(bytes) >> DEV_BSHIFT)
#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
((unsigned long)(db) << DEV_BSHIFT)
/* 64 bit versions of btodb and dbtob */
#define lbtodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
((u_offset_t)(bytes) >> DEV_BSHIFT)
#define ldbtob(db) /* calculates (db * DEV_BSIZE) */ \
((u_offset_t)(db) << DEV_BSHIFT)
#ifndef _ASM /* Avoid typedef headaches for assembly files */
#ifndef NODEV
#define NODEV (dev_t)(-1l)
#ifdef _SYSCALL32
#define NODEV32 (dev32_t)(-1)
#endif /* _SYSCALL32 */
#endif /* NODEV */
#endif /* _ASM */
/*
* Size of arg list passed in by user.
*/
#define NCARGS32 0x100000
#define NCARGS64 0x200000
#ifdef _LP64
#define NCARGS NCARGS64
#else /* _LP64 */
#define NCARGS NCARGS32
#endif /* _LP64 */
/*
* Scale factor for scaled integers used to count
* %cpu time and load averages.
*/
#define FSHIFT 8 /* bits to right of fixed binary point */
#define FSCALE (1<<FSHIFT)
/*
* Delay units are in microseconds.
*
* XXX These macros are not part of the DDI!
*/
#if defined(_KERNEL) && !defined(_ASM)
extern void drv_usecwait(clock_t);
#define DELAY(n) drv_usecwait(n)
#define CDELAY(c, n) \
{ \
register int N = n; \
while (--N > 0) { \
if (c) \
break; \
drv_usecwait(1); \
} \
}
#endif /* defined(_KERNEL) && !defined(_ASM) */
#ifdef __cplusplus
}
#endif
/*
* The following is to free utilities from machine dependencies within
* an architecture. Must be included after definition of DEV_BSIZE.
*/
#if (defined(_KERNEL) || defined(_KMEMUSER))
#if defined(_MACHDEP)
#include <sys/machparam.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_KERNEL) && !defined(_ASM)
extern int cpu_decay_factor;
extern pid_t maxpid;
extern pid_t jump_pid;
extern uintptr_t _kernelbase;
extern uintptr_t _userlimit;
extern uintptr_t _userlimit32;
#endif /* defined(_KERNEL) && !defined(_ASM) */
#if !defined(_MACHDEP)
/*
* Implementation architecture independent sections of the kernel use
* this section.
*/
#if defined(_KERNEL) && !defined(_ASM)
extern int hz;
extern int snooping;
extern uint_t snoop_interval;
extern const unsigned long _pagesize;
extern const unsigned int _pageshift;
extern const unsigned long _pageoffset;
extern const unsigned long long _pagemask;
extern const unsigned long _mmu_pagesize;
extern const unsigned int _mmu_pageshift;
extern const unsigned long _mmu_pageoffset;
extern const unsigned long _mmu_pagemask;
extern const uintptr_t _argsbase;
extern const unsigned long _defaultstksz;
extern const unsigned int _nbpg;
extern const int _ncpu;
extern const int _clsize;
#endif /* defined(_KERNEL) && !defined(_ASM) */
#define PAGESIZE _pagesize
#define PAGESHIFT _pageshift
#define PAGEOFFSET _pageoffset
#define PAGEMASK _pagemask
#define MMU_PAGESIZE _mmu_pagesize
#define MMU_PAGESHIFT _mmu_pageshift
#define MMU_PAGEOFFSET _mmu_pageoffset
#define MMU_PAGEMASK _mmu_pagemask
#define KERNELBASE _kernelbase
#define USERLIMIT _userlimit
#define USERLIMIT32 _userlimit32
#define ARGSBASE _argsbase
#define DEFAULTSTKSZ _defaultstksz
#define NCPU _ncpu
#endif /* defined(_MACHDEP) */
/*
* Some random macros for units conversion.
*
* These are machine independent but contain constants (*PAGESHIFT) which
* are only defined in the machine dependent file.
*/
/*
* MMU pages to bytes, and back (with and without rounding)
*/
#define mmu_ptob(x) ((x) << MMU_PAGESHIFT)
#define mmu_btop(x) (((x)) >> MMU_PAGESHIFT)
#define mmu_btopr(x) ((((x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT))
/*
* 2 versions of pages to disk blocks
*/
#define mmu_ptod(x) ((x) << (MMU_PAGESHIFT - DEV_BSHIFT))
#define ptod(x) ((x) << (PAGESHIFT - DEV_BSHIFT))
/*
* pages to bytes, and back (with and without rounding)
* Large Files: The explicit cast of x to unsigned int is deliberately
* removed as part of large files work. We pass longlong values to
* theses macros.
*
* Cast the input to ptob() to be a page count. This enforces 64-bit
* math on 64-bit kernels. For 32-bit kernels, callers must explicitly
* cast the input to be a 64-bit type if values greater than 4GB/PAGESIZE
* are possible.
*/
#ifdef _LP64
#define ptob(x) (((pgcnt_t)(x)) << PAGESHIFT)
#else
#define ptob(x) ((x) << PAGESHIFT)
#endif /* _LP64 */
#define btop(x) (((x) >> PAGESHIFT))
#define btopr(x) ((((x) + PAGEOFFSET) >> PAGESHIFT))
/*
* disk blocks to pages, rounded and truncated
*/
#define NDPP (PAGESIZE/DEV_BSIZE) /* # of disk blocks per page */
#define dtop(DD) (((DD) + NDPP - 1) >> (PAGESHIFT - DEV_BSHIFT))
#define dtopt(DD) ((DD) >> (PAGESHIFT - DEV_BSHIFT))
/*
* kB to pages and back
*/
#define kbtop(x) ((x) >> (PAGESHIFT - 10))
#define ptokb(x) ((x) << (PAGESHIFT - 10))
/*
* POSIX.4 related configuration parameters
*/
#define _AIO_LISTIO_MAX (4096)
#define _AIO_MAX (-1)
#define _MQ_OPEN_MAX (-1)
#define _MQ_PRIO_MAX (32)
#define _SEM_NSEMS_MAX INT_MAX
#define _SEM_VALUE_MAX INT_MAX
#ifdef __cplusplus
}
#endif
#else /* (defined(_KERNEL) || defined(_KMEMUSER)) */
/*
* The following are assorted machine dependent values which can be
* obtained in a machine independent manner through sysconf(2) or
* sysinfo(2). In order to guarantee that these provide the expected
* value at all times, the System Private interface (leading underscore)
* is used.
*/
#include <sys/unistd.h>
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(_ASM)
extern long _sysconf(int); /* System Private interface to sysconf() */
#endif /* !defined(_ASM) */
#define HZ ((clock_t)_sysconf(_SC_CLK_TCK))
#define TICK (1000000000/((clock_t)_sysconf(_SC_CLK_TCK)))
#define PAGESIZE (_sysconf(_SC_PAGESIZE))
#define PAGEOFFSET (PAGESIZE - 1)
#define PAGEMASK (~PAGEOFFSET)
#define MAXPID ((pid_t)_sysconf(_SC_MAXPID))
#ifdef __cplusplus
}
#endif
#endif /* (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) */
#endif /* _SYS_PARAM_H */