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- /* @(#)param.h 3.3 (ULTRIX) 9/4/87 */
-
- /************************************************************************
- * *
- * Copyright (c) 1986 by *
- * Digital Equipment Corporation, Maynard, MA *
- * All rights reserved. *
- * *
- * This software is furnished under a license and may be used and *
- * copied only in accordance with the terms of such license and *
- * with the inclusion of the above copyright notice. This *
- * software or any other copies thereof may not be provided or *
- * otherwise made available to any other person. No title to and *
- * ownership of the software is hereby transferred. *
- * *
- * This software is derived from software received from the *
- * University of California, Berkeley, and from Bell *
- * Laboratories. Use, duplication, or disclosure is subject to *
- * restrictions under license agreements with University of *
- * California and with AT&T. *
- * *
- * The information in this software is subject to change without *
- * notice and should not be construed as a commitment by Digital *
- * Equipment Corporation. *
- * *
- * Digital assumes no responsibility for the use or reliability *
- * of its software on equipment which is not supplied by Digital. *
- * *
- ************************************************************************/
-
- /************************************************************************
- * Modification History
- *
- * 11 Sep 86 -- koehler
- * added a constant so that everyone may always tell what the
- * units returned are from getmnt
- *
- * 29 Apr 86 -- depp
- * Moved System IPC constants to either /sys/h: msg.h, sem.h
- *
- * 14 Aug 85 -- depp
- * Removed SEMUND definition as this should be NPROC
- *
- * 03 May 85 -- Larry Cohen *
- * Increase size of CBSIZE to 60 from 28 *
- * *
- * 25 Apr 85 -- depp
- * Removed SHMEM ifdefs
- *
- * 24 Apr 85 -- depp
- * Increased SMBRK (delta between end of data and beginning of
- * shared memory) to 32K (64 pages).
- *
- * Stephen Reilly, 18-Apr-1985
- * 004- Increased the number mounted devices from 15 to 64.
- *
- * David L Ballenger, 16-Apr-1985
- * 003- Remove definition of HZ.
- *
- * 9 Apr 85 -- depp
- * Define System V IPC constants
- *
- * David L Ballenger, 31-Mar-1985 *
- * 0002 Define HZ for System V routines. *
- * *
- * 001 - March 11 1985 - Larry Cohen *
- * increase NOFILE from 20 to 64 *
- * *
- ************************************************************************/
-
- /* param.h 6.1 83/07/29 */
-
- /*
- * Machine type dependent parameters.
- */
- #ifdef KERNEL
- #include "../machine/param.h"
- #else
- #include <machine/param.h>
- #endif
-
- #define NPTEPG (NBPG/(sizeof (struct pte)))
-
- /*
- * Shared memory -- number of segments per process
- */
-
- #define SMSEG 6
-
- /*
- * Machine-independent constants
- */
- #define NMOUNT 254 /* 004 number of mountable file systems */
- #define MSWAPX 254 /* 004 pseudo mount table index for swapdev */
- #define NUM_FS 0xff /* maximum number of file system types */
- #define MINPGTHRESH 8192 /* size of file where we demand page it in */
- /* files > this size are demand paged */
- /* files < this size are entirely read in */
- /* settable at mount time */
- /* default set by each file system */
-
- /*
- * MAXUPRC is now a global variable: maxuprc whose value is assigned
- * in param.c
- */
- #define NOFILE 64 /* max open files per process */ /*LSC001*/
- /* NOFILE MUST NOT BE >= 31; SEE pte.h */
- #define CANBSIZ 256 /* max size of typewriter line */
- #define NCARGS 10240 /* # characters in exec arglist */
- #define NGROUPS 32 /* max number groups */
-
- #define NOGROUP -1 /* marker for empty group set member */
-
- /*
- * Priorities
- */
- #define PCATCH 0400
- #define PMASK 0177
- #define PSWP 0
- #define PINOD 10
- #define PRIBIO 20
- #define PRIUBA 24
- #define PZERO 25
- #define PPIPE 26
- #define PWAIT 30
- #define PLOCK 35
- #define PSLEP 40
- #define PUSER 50
-
- #define NZERO 20
-
- /*
- * Signals
- */
- #ifdef KERNEL
- #include "../h/signal.h"
- #else
- #include <signal.h>
- #endif
-
- #define ISSIG(p) \
- ((p)->p_sig && ((p)->p_flag&STRC || \
- ((p)->p_sig &~ ((p)->p_sigignore | (p)->p_sigmask))) && issig())
-
- /*
- * Fundamental constants of the implementation.
- */
- #define NBBY 8 /* number of bits in a byte */
- #define NBPW sizeof(int) /* number of bytes in an integer */
-
- #define NULL 0
- #define CMASK 0 /* default mask for file creation */
- #define NODEV (dev_t)(-1)
-
- /*
- * Clustering of hardware pages on machines with ridiculously small
- * page sizes is done here. The paging subsystem deals with units of
- * CLSIZE pte's describing NBPG (from vm.h) pages each... BSIZE must
- * be CLSIZE*NBPG in the current implementation, that is the paging subsystem
- * deals with the same size blocks that the file system uses.
- *
- * NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE
- */
- #define CLBYTES (CLSIZE*NBPG)
- #define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */
- #define claligned(x) ((((int)(x))&CLOFSET)==0)
- #define CLOFF CLOFSET
- #define CLSHIFT (PGSHIFT+CLSIZELOG2)
-
- #if CLSIZE==1
- #define clbase(i) (i)
- #define clrnd(i) (i)
- #else
- /* give the base virtual address (first of CLSIZE) */
- #define clbase(i) ((i) &~ (CLSIZE-1))
- /* round a number of clicks up to a whole cluster */
- #define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1))
- #endif
-
- #ifndef INTRLVE
- /* macros replacing interleaving functions */
- #define dkblock(bp) ((bp)->b_blkno)
- #define dkunit(bp) (minor((bp)->b_dev) >> 3)
- #endif
-
- #define CBSIZE 60 /* number of chars in a clist block */
- #define CROUND 0x3F /* clist rounding; sizeof(int *) + CBSIZE -1*/
-
- #ifndef KERNEL
- #include <sys/types.h>
- #else
- #ifndef LOCORE
- #include "../h/types.h"
- #endif
- #endif
-
- /*
- * 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.
- * Block devices are read in BLKDEV_IOSIZE units. This number must
- * be a power of two and in the range of
- * DEV_BSIZE <= BLKDEV_IOSIZE <= MAXBSIZE
- * This size has no effect upon the file system, but is usually set
- * to the block size of the root file system, so as to maximize the
- * speed of ``fsck''.
- */
- /*#define MAXBSIZE 8192 */ /*pkay isode doesn't like this*/
- #define DEV_BSIZE 512
- #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
- #define BLKDEV_IOSIZE 2048
- #define MAXFRAG 8
- #define FSDUNIT 1024 /* used by getmnt */
-
- #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
- ((unsigned)(bytes) >> DEV_BSHIFT)
- #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
- ((unsigned)(db) << DEV_BSHIFT)
-
- /*
- * Map a ``block device block'' to a file system block.
- * This should be device dependent, and will be after we
- * add an entry to cdevsw for that purpose. For now though
- * just use DEV_BSIZE.
- */
- #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
-
- /*
- * MAXPATHLEN defines the longest permissable 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 1024
- #define MAXSYMLINKS 8
-
- /*
- * bit map related macros
- */
- #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
- #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
- #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
- #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
-
- /*
- * Macros for fast min/max.
- */
- #define MIN(a,b) (((a)<(b))?(a):(b))
- #define MAX(a,b) (((a)>(b))?(a):(b))
-
- /*
- * Macros for counting and rounding.
- */
- #define howmany(x, y) (((x)+((y)-1))/(y))
- #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
-
-