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irix-657m-src/irix/kern/sys/param.h
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/* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
/* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF */
/* UNIX System Laboratories, Inc. */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
/*
* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
* PROPRIETARY NOTICE (Combined)
*
* This source code is unpublished proprietary information
* constituting, or derived under license from AT&T's UNIX(r) System V.
* In addition, portions of such source code were derived from Berkeley
* 4.3 BSD under license from the Regents of the University of
* California.
*
*
*
* Copyright Notice
*
* Notice of copyright on this source code product does not indicate
* publication.
*
* (c) 1986,1987,1988,1989 Sun Microsystems, Inc
* (c) 1983,1984,1985,1986,1987,1988,1989 AT&T.
* All rights reserved.
*
*/
#ifndef _SYS_PARAM_H
#define _SYS_PARAM_H
#ident "$Revision: 3.90 $"
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#include <sys/types.h>
#include <sys/signal.h> /* BSD compat */
#endif
/*
* Fundamental variables; don't change too often.
* Warning: keep in sync with <unistd.h>, <sys/unistd.h>
*/
/* POSIX version number, returned by sysconf() system call */
#ifndef _POSIX_VERSION
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define _POSIX_VERSION 199506L
#endif
#if defined(_LANGUAGE_FORTRAN)
#define _POSIX_VERSION 199506
#endif
#endif
#ifndef _POSIX_VDISABLE
#define _POSIX_VDISABLE 0 /* Disable special character functions */
#endif
#ifndef MAX_INPUT
#define MAX_INPUT 512 /* Maximum bytes stored in the input queue */
#endif
#ifndef MAX_CANON
#define MAX_CANON 256 /* Maximum bytes in a line for canoical processing */
#endif
#define UID_NOBODY 60001 /* user ID no body */
#define GID_NOBODY UID_NOBODY
#define UID_NOACCESS 60002 /* user ID no access */
/* NOTE that MAXPID is an internal limit, and is not necessarily the
* same as PID_MAX, defined in <limits.h>
* The procfs readdir algorithm depends on this value being somewhat less
* than MAXINT.
*/
#define MAXPID 0x7ffffff0 /* max process id */
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define MAXUID 0x7fffffff /* max user id */
#endif
#if defined(_LANGUAGE_FORTRAN)
#define MAXUID $7fffffff
#endif
#define MAXLINK 30000 /* max links */
#define SSIZE 1 /* initial stack size (*NBPP bytes) */
#define SINCR 1 /* increment of stack (*NBPP bytes) */
#define KSTKSIZE 1 /* Number of pages for kernel stack */
#if _PAGESZ == 4096
#define EXTKSTKSIZE 1 /* size of kern stack extension (*NBPP bytes) */
#define KSTKIDX 0
#define KSTEIDX 1 /* Kernel stack extension index */
#else /* _PAGESZ == 16384 */
#define EXTKSTKSIZE 0 /* size of kern stack extension (*NBPP bytes) */
#define KSTKIDX 0
#endif /* _PAGESZ == 16384 */
#define CANBSIZ 256 /* max size of typewriter line */
#define HZ 100 /* 100 ticks/second of the clock */
#define TICK 10000000 /* nanoseconds per tick */
#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 must not be set greater than NGROUPS_MAX in master.d/kernel.
* Compilation will not succeed in that case.
*/
#define NGROUPS 16 /* max # groups process may be in */
/*
* Priorities. Should not be altered too much.
*/
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define PMASK 0177
#define PCATCH 0400
#define PLTWAIT 01000 /* Long term wait */
#define PRECALC 01000 /* Keep other kernel isms happy for now */
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
#if defined(_LANGUAGE_FORTRAN)
#define PMASK O'0177'
#define PCATCH O'0400'
#define PLTWAIT O'01000'
#define PRECALC O'01000'
#endif /* defined(_LANGUAGE_FORTRAN) */
#define PSWP 0
#define PINOD 10
#define PSNDD PINOD
#define PRIBIO 20
#define PZERO 25
#define PMEM 0
#ifndef NZERO
#define NZERO 20
#endif
#define PPIPE 26
#define PVFS 27
#define PWAIT 30
#define PSLEP 39
#define PUSER 60
/*
* extended rt pri range
*/
#define PBATCH_CRITICAL -1
#define PTIME_SHARE -2
#define PTIME_SHARE_OVER -3
#define PBATCH -4
#define PWEIGHTLESS -5
/* for NDPLOMAX and NDPLOMIN defs include <sys/schedctl.h> */
#define PIDLE (PWEIGHTLESS + NDPLOMAX - NDPLOMIN - 1)
/*
* fundamental constants of the implementation--
* cannot be changed easily
*/
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define NBPS (NCPS*NBPC) /* Number of bytes per segment */
#define NBPW sizeof(int) /* number of bytes in an integer */
#define NCPS (NBPC/(sizeof(pte_t))) /* Number of clicks per segment */
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
#define IO_NBPC 4096 /* Number of bytes per click for DMA purposes */
#define IO_BPCSHIFT 12 /* LOG2(IO_NBPC) if exact */
#define MIN_NBPC 4096 /* Minimum number of bytes per click */
#define MIN_BPCSHIFT 12 /* LOG2(MIN_NBPC) if exact */
#define MIN_CPSSHIFT 10 /* LOG2(MIN_NCPS) if exact */
#define NBPC _PAGESZ /* Number of bytes per click */
#if NBPC == 4096
#define BPCSHIFT 12 /* LOG2(NBPC) if exact */
#define CPSSHIFT 10 /* LOG2(NCPS) if exact */
#endif
#if NBPC == 16384
#define BPCSHIFT 14 /* LOG2(NBPC) if exact */
#ifndef PTE_64BIT
#define CPSSHIFT 12 /* LOG2(NCPS) if exact */
#else /* PTE_64BIT */
#define CPSSHIFT 11 /* LOG2(NCPS) if exact */
#endif /* PTE_64BIT */
#endif
#define BPSSHIFT (BPCSHIFT+CPSSHIFT)
#ifndef NULL
#define NULL 0L
#endif
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define CMASK 022 /* default mask for file creation */
#define NODEV (dev_t)(-1)
#define NOPAGE ((unsigned int)-1)
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
#if defined(_LANGUAGE_FORTRAN)
#define CMASK O'022'
#define NODEV (-1)
#define NOPAGE (-1)
#endif /* defined(_LANGUAGE_FORTRAN) */
/*
* XXX These should be expunged, and BBSHIFT should be defined as 9.
*/
#define NBPSCTR 512 /* Bytes per disk sector. */
#define SCTRSHFT 9 /* Shift for BPSECT. */
/* in mips the psw is the status register */
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#if IP32
#define BASEPRI(psw) (((psw) & SR_IMASK) == SR_IMASK0)
#else
#define BASEPRI(psw) (((psw) & SR_IMASK) == SR_IMASK)
#endif
#define USERMODE(psw) (((psw) & SR_KSU_MSK) == SR_KSU_USR)
#if !defined(_LANGUAGE_ASSEMBLY)
struct paramconst {
int p_usize; /* KSTKSIZE */
int p_extusize; /* EXTKSTKSIZE */
};
#endif
#ifdef _MIPSEB
#define lobyte(X) (((unsigned char *)&X)[1])
#define hibyte(X) (((unsigned char *)&X)[0])
#define loword(X) (((ushort *)&X)[1])
#define hiword(X) (((ushort *)&X)[0])
#else
#define lobyte(X) (((unsigned char *)&X)[0])
#define hibyte(X) (((unsigned char *)&X)[1])
#define loword(X) (((ushort *)&X)[0])
#define hiword(X) (((ushort *)&X)[1])
#endif
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
/*
* MAXPATHLEN defines the longest permissible path length,
* including the terminating null, after expanding symbolic links.
* 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 MAXSYMLINKS 30
#define MAXNAMELEN 256
/*
* 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 10240
#endif /* PIPE_BUF */
#ifndef PIPE_MAX /* max # bytes written to a pipe in a write */
#define PIPE_MAX 10240
#endif /* PIPE_MAX */
#ifndef NBBY
#define NBBY 8 /* number of bits per byte */
#endif /* NBBY */
/*
* Block I/O parameterization. A basic block (BB) is the lowest size of
* filesystem allocation, and must == NBPSCTR. Length units given to bio
* routines are in BB's.
*/
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define BBSHIFT 9
#define BBSIZE (1<<BBSHIFT)
#define BBMASK (BBSIZE-1)
#define BTOBB(bytes) (((unsigned long)(bytes) + BBSIZE - 1) >> BBSHIFT)
#define BTOBBT(bytes) ((unsigned long)(bytes) >> BBSHIFT)
#define BBTOB(bbs) ((bbs) << BBSHIFT)
#define OFFTOBB(bytes) (((__uint64_t)(bytes) + BBSIZE - 1) >> BBSHIFT)
#define OFFTOBBT(bytes) ((off_t)(bytes) >> BBSHIFT)
#define BBTOOFF(bbs) ((off_t)(bbs) << BBSHIFT)
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define SEEKLIMIT32 0x7fffffff
#define BBSEEKLIMIT32 BTOBBT(SEEKLIMIT32)
#define SEEKLIMIT 0x7fffffffffffffffLL
#define BBSEEKLIMIT OFFTOBBT(SEEKLIMIT)
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
#if defined(_LANGUAGE_FORTRAN)
#define SEEKLIMIT32 $7fffffff
#define SEEKLIMIT $7fffffffffffffff
#endif /* defined(_LANGUAGE_FORTRAN) */
/*
* 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.
*/
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define MAXBSIZE 8192
#define DEV_BSIZE BBSIZE
#define DEV_BSHIFT BBSHIFT /* log2(DEV_BSIZE) */
#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
((unsigned)(bytes) >> DEV_BSHIFT)
#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
((unsigned)(db) << DEV_BSHIFT)
/*
* Size of block device i/o is parameterized here.
* Currently the system supports page-sized i/o.
*/
#define BLKDEV_IOSHIFT BPCSHIFT
#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
/* convert a byte offset into an offset into a logical block for a block dev */
#define BLKDEV_OFF(off) ((off) & (BLKDEV_IOSIZE - 1))
/* convert a byte offset into a block device logical block # */
#define BLKDEV_LBN(off) ((off) >> BLKDEV_IOSHIFT)
/* number of bb's per block device block */
#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
/* convert logical block dev block to physical blocks (== bb's) */
#define BLKDEV_LTOP(bn) ((bn) * BLKDEV_BB)
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
/*
* Maximum size of hostname and domainname recognized and stored in the
* kernel by sethostname and setdomainname
*/
#define MAXHOSTNAMELEN 256 /* can't be longer than SYS_NMLN - 1 */
/*
* Macros for fast min/max.
*/
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
/*
* Macros for counting and rounding.
*/
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
#ifndef howmany
#define howmany(x, y) (((x)+((y)-1))/(y))
#endif
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
#if defined(_KERNEL) || defined(_STANDALONE)
/*
* DELAY(n) should be n microseconds, roughly.
*/
#define DELAY(n) us_delay(n)
/* to guarentee delay between writes, use DELAYBUS */
#define DELAYBUS(n) us_delaybus(n)
/* timeout call with this tick results in immediate timepoke()
*/
#define TIMEPOKE_NOW -100L
extern int ngroups_max; /* master.d/kernel */
#endif /* _KERNEL || _STANDALONE */
#endif /* _SYS_PARAM_H */
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