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/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)param.h 7.1 (Berkeley) 6/4/86
*/
#define BSD 43 /* 4.3 * 10, as cpp doesn't do floats */
#define BSD4_3 1
#define NPTEPG (NBPG/(sizeof (struct pte)))
/*
* Machine-independent constants
*/
#define NMOUNT 20 /* number of mountable file systems */
/* NMOUNT must be <= 255 unless c_mdev (cmap.h) is expanded */
#define MSWAPX NMOUNT /* pseudo mount table index for swapdev */
#define MAXUPRC 40 /* max processes per user */
#define NOFILE 64 /* max open files per process */
#define CANBSIZ 256 /* max size of typewriter line */
#define NCARGS 20480 /* # characters in exec arglist */
#define NGROUPS 16 /* max number groups */
#define NOGROUP 65535 /* marker for empty group set member */
/*
* Priorities
*/
#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 0
#include <signal.h>
#define ISSIG(p) \
((p)->p_sig && ((p)->p_flag&STRC || \
((p)->p_sig &~ ((p)->p_sigignore | (p)->p_sigmask))) && issig())
#define NBPW sizeof(int) /* number of bytes in an integer */
#define NULL 0
#define CMASK 026 /* default mask for file creation */
/* was 022, changed 1/15/87 SMS */
#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.
*
* 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
/* CBLOCK is the size of a clist block, must be power of 2 */
#define CBLOCK 64
#define CBSIZE (CBLOCK - sizeof(struct cblock *)) /* data chars/clist */
#define CROUND (CBLOCK - 1) /* clist rounding */
#ifdef VMS
#include "types.h"
#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
#define DEV_BSIZE 512
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define BLKDEV_IOSIZE 2048
#define MAXFRAG 8
#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.
*/
#ifndef howmany
#define howmany(x, y) (((x)+((y)-1))/(y))
#endif
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
/*
* Maximum size of hostname recognized and stored in the kernel.
*/
#define MAXHOSTNAMELEN 64
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