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- /*
- * Mach Operating System
- * Copyright (c) 1987 Carnegie-Mellon University
- * All rights reserved. The CMU software License Agreement specifies
- * the terms and conditions for use and redistribution.
- */
- /*
- * HISTORY
- * $Log: param.h,v $
- * 07-Jan-93 Mac Gillon (mgillon) at NeXT
- * Integrated POSIX support
- *
- * 02-Apr-90 Avadis Tevanian, Jr. (avie) at NeXT
- * Increased MAXUPRC to 100 for NeXT.
- *
- * 28-Feb-90 Gregg kellogg (gk) at NeXT
- * Fixed CHECK_SIGNALS macro to take 3 arguments instead of 2.
- *
- * Revision 2.12 89/10/11 14:53:22 dlb
- * Minor macro changes to pass thread to thread_should_halt.
- * [88/10/18 dlb]
- *
- */
- /*
- * 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
- */
-
- /* SUN_VFS */
- /* @(#)param.h 2.2 88/06/09 4.0NFSSRC SMI; */
- /* SUN_VFS */
-
- #ifndef _SYS_PARAM_H_
- #define _SYS_PARAM_H_
-
- #ifndef BSD
- #define BSD 43 /* 4.3 * 10, as cpp doesn't do floats */
- #endif
-
- #define BSD4_3 1
-
- /*
- * Machine type dependent parameters.
- */
- #include <machine/machparam.h>
-
- #define NPTEPG (NBPG/(sizeof (struct pte)))
-
- /*
- * Machine-independent constants
- */
- #define NMOUNT 40 /* est. of # mountable fs for quota calc */
- /* NMOUNT must be <= 255 unless c_mdev (cmap.h) is expanded */
- #define MSWAPX 15 /* pseudo mount table index for swapdev */
- #if NeXT
- #define MAXUPRC 100
- #define NOFILE 256 /* max open files per process */
- #else NeXT
- #if defined(multimax) || defined(balance)
- #define MAXUPRC 100 /* max processes per user */
- #else defined(multimax) || defined(balance)
- #define MAXUPRC 40 /* max processes per user */
- #endif defined(multimax) || defined(balance)
- #define NOFILE 64 /* max open files per process */
- #endif NeXT
- /* SUN_VFS */
- #define MAXLINK 32767 /* max links */
- /* SUN_VFS */
- #define CANBSIZ 256 /* max size of typewriter line */
- #if NeXT
- #define NCARGS 40960 /* # characters in exec arglist */
- #else NeXT
- #define NCARGS 20480 /* # characters in exec arglist */
- #endif NeXT
- #define NGROUPS 16 /* max number groups */
-
- #define NOGROUP (gid_t)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
- /* SUN_VFS */
- #define PVFS 27
- /* SUN_VFS */
- #define PWAIT 30
- #define PLOCK 35
- #define PSLEP 40
- #define PUSER 50
- #define PMASK 0177
- #define PCATCH 0400 /* return if sleep interrupted, don't longjmp */
-
- #define NZERO 0
-
- /*
- * Signals
- */
- #import <sys/signal.h>
-
- /*
- * Return values from tsleep().
- */
- #define TS_OK 0 /* normal wakeup */
- #define TS_TIME 1 /* timed-out wakeup */
- #define TS_SIG 2 /* asynchronous signal wakeup */
-
- /*
- * Check for per-process and per thread signals.
- */
- #define SHOULDissig(p,uthreadp) \
- (((p)->p_sig | (uthreadp)->uu_sig) && ((p)->p_flag&STRC || \
- (((p)->p_sig | (uthreadp)->uu_sig) &~ \
- ((p)->p_sigignore | (p)->p_sigmask))))
-
- /*
- * Check for signals, handling possible stop signals.
- * Ignores signals already 'taken' and per-thread signals.
- * Use before and after thread_block() in sleep().
- * (p) is always current process.
- */
- #if NeXT
- #define ISSIG(p) (thread_should_halt(current_thread()) || \
- (SHOULDissig(p,current_thread()->_uthread) && issig(0)))
-
- #define ISSIG_CATCH(p) (thread_should_halt(current_thread()) || \
- (SHOULDissig(p,current_thread()->_uthread) && issig(1)))
- #else
- #define ISSIG(p) (thread_should_halt(current_thread()) || \
- (SHOULDissig(p,current_thread()->_uthread) && issig()))
- #endif
-
- /*
- * Check for signals, including signals already taken and
- * per-thread signals. Use in trap() and syscall() before
- * exiting kernel.
- */
- #define CHECK_SIGNALS(p, thread, uthreadp) \
- (!thread_should_halt(thread) \
- && ((p)->p_cursig \
- || SHOULDissig(p,uthreadp)))
-
- #define NBPW sizeof(int) /* number of bytes in an integer */
-
- #ifndef NULL
- #if defined(__STRICT_BSD__) || defined(KERNEL)
- #define NULL 0
- #else /* __STRICT_BSD__ || KERNEL */
- #import <stddef.h>
- #endif /* __STRICT_BSD__ || KERNEL */
- #endif /* NULL */
- #define CMASK 022 /* 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.
- *
- * 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 CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */
- /* Data chars/clist. */
- #define CBSIZE (CBLOCK - sizeof(struct cblock *) - CBQSIZE)
- #define CROUND (CBLOCK - 1) /* clist rounding */
-
- #ifndef __ASSEMBLER__
- #import <sys/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 BLKDEV_IOSIZE 2048
- #define MAXFRAG 8
-
- #if NeXT
- #define btodb(bytes, blocksize) ((unsigned int) ((bytes) / (blocksize)))
- #define dbtob(block, blocksize) ((unsigned int) ((block) * (blocksize)))
- #else NeXT
- #define DEV_BSIZE 512
- #define DEV_BSHIFT 9 /* 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)
-
- /*
- * 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))
- #endif !NeXT
-
- /*
- * 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 20
-
- /*
- * bit map related macros
- */
- #define setbit(a,i) (*(((char *)(a)) + ((i)/NBBY)) |= 1<<((i)%NBBY))
- #define clrbit(a,i) (*(((char *)(a)) + ((i)/NBBY)) &= ~(1<<((i)%NBBY)))
- #define isset(a,i) (*(((char *)(a)) + ((i)/NBBY)) & (1<<((i)%NBBY)))
- #define isclr(a,i) ((*(((char *)(a)) + ((i)/NBBY)) & (1<<((i)%NBBY))) == 0)
-
- #if !defined(vax) && !defined(i386)
- #define _bit_set(i,a) setbit(a,i)
- #define _bit_clear(i,a) clrbit(a,i)
- #define _bit_tst(i,a) isset(a,i)
- #endif !defined(vax) && !defined(i386)
-
- /*
- * Macros for fast min/max.
- */
- #ifndef MIN
- #define MIN(a,b) (((a)<(b))?(a):(b))
- #endif MIN
- #ifndef MAX
- #define MAX(a,b) (((a)>(b))?(a):(b))
- #endif MAX
-
- /*
- * 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))
-
- /* SUN_VFS */
- /*
- * 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)
- /* SUN_VFS */
-
- /*
- * Maximum size of hostname recognized and stored in the kernel.
- */
- #define MAXHOSTNAMELEN 256
- #define MAXDOMNAMELEN 256 /* maximum domain name length */
-
- #define DEFAULTHOSTNAME "localhost"
-
- #endif _SYS_PARAM_H_
-