165a1cfb1Smckusick /* 265a1cfb1Smckusick * Copyright (c) 1982 Regents of the University of California. 365a1cfb1Smckusick * All rights reserved. The Berkeley software License Agreement 465a1cfb1Smckusick * specifies the terms and conditions for redistribution. 565a1cfb1Smckusick * 6*ebd4ffb8Skarels * @(#)param.h 6.16 (Berkeley) 02/19/86 765a1cfb1Smckusick */ 85db792e4Sbill 91a9e6e3cSkarels #define BSD 43 /* 4.3 * 10, as cpp doesn't do floats */ 101a9e6e3cSkarels #define BSD4_3 1 112867d692Sbloom 125db792e4Sbill /* 134951e502Ssam * Machine type dependent parameters. 145db792e4Sbill */ 158a98aca3Ssam #ifdef KERNEL 16d747881bSkarels #include "../machine/machparam.h" 178a98aca3Ssam #else 18d747881bSkarels #include <machine/machparam.h> 19b481cdefSroot #endif 205db792e4Sbill 21b481cdefSroot #define NPTEPG (NBPG/(sizeof (struct pte))) 22b481cdefSroot 23b481cdefSroot /* 24b481cdefSroot * Machine-independent constants 25b481cdefSroot */ 2674c6c69bSkarels #define NMOUNT 20 /* number of mountable file systems */ 27f0028148Skarels /* NMOUNT must be <= 255 unless c_mdev (cmap.h) is expanded */ 28818d21a2Skarels #define MSWAPX NMOUNT /* pseudo mount table index for swapdev */ 291a9e6e3cSkarels #define MAXUPRC 40 /* max processes per user */ 30e3c8cc35Skarels #define NOFILE 64 /* max open files per process */ 315db792e4Sbill #define CANBSIZ 256 /* max size of typewriter line */ 3274c6c69bSkarels #define NCARGS 20480 /* # characters in exec arglist */ 330b98f570Skarels #define NGROUPS 16 /* max number groups */ 3445ac661dSwnj 35*ebd4ffb8Skarels #define NOGROUP 65535 /* marker for empty group set member */ 36e74c57f3Ssam 375db792e4Sbill /* 38b481cdefSroot * Priorities 395db792e4Sbill */ 405db792e4Sbill #define PSWP 0 415db792e4Sbill #define PINOD 10 425db792e4Sbill #define PRIBIO 20 435db792e4Sbill #define PRIUBA 24 445db792e4Sbill #define PZERO 25 455db792e4Sbill #define PPIPE 26 465db792e4Sbill #define PWAIT 30 47bea46c20Ssam #define PLOCK 35 485db792e4Sbill #define PSLEP 40 495db792e4Sbill #define PUSER 50 505db792e4Sbill 5174c6c69bSkarels #define NZERO 0 525db792e4Sbill 535db792e4Sbill /* 54b481cdefSroot * Signals 555db792e4Sbill */ 56586761c3Ssam #ifdef KERNEL 5764691dc4Sbloom #include "signal.h" 58586761c3Ssam #else 5946cc71adSbill #include <signal.h> 6046cc71adSbill #endif 61c6983186Sbill 62586761c3Ssam #define ISSIG(p) \ 63586761c3Ssam ((p)->p_sig && ((p)->p_flag&STRC || \ 64eb2beebeSroot ((p)->p_sig &~ ((p)->p_sigignore | (p)->p_sigmask))) && issig()) 6503c2128fSroot 665db792e4Sbill #define NBPW sizeof(int) /* number of bytes in an integer */ 675db792e4Sbill 685db792e4Sbill #define NULL 0 69f0028148Skarels #define CMASK 022 /* default mask for file creation */ 705db792e4Sbill #define NODEV (dev_t)(-1) 715db792e4Sbill 725db792e4Sbill /* 735db792e4Sbill * Clustering of hardware pages on machines with ridiculously small 745db792e4Sbill * page sizes is done here. The paging subsystem deals with units of 75f0028148Skarels * CLSIZE pte's describing NBPG (from vm.h) pages each. 765db792e4Sbill * 775db792e4Sbill * NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE 785db792e4Sbill */ 79248881f8Swnj #define CLBYTES (CLSIZE*NBPG) 80e163c03cSwnj #define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */ 81248881f8Swnj #define claligned(x) ((((int)(x))&CLOFSET)==0) 82248881f8Swnj #define CLOFF CLOFSET 83b481cdefSroot #define CLSHIFT (PGSHIFT+CLSIZELOG2) 845db792e4Sbill 85b481cdefSroot #if CLSIZE==1 86b481cdefSroot #define clbase(i) (i) 87b481cdefSroot #define clrnd(i) (i) 88b481cdefSroot #else 895db792e4Sbill /* give the base virtual address (first of CLSIZE) */ 905db792e4Sbill #define clbase(i) ((i) &~ (CLSIZE-1)) 915db792e4Sbill /* round a number of clicks up to a whole cluster */ 925db792e4Sbill #define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1)) 93b481cdefSroot #endif 945db792e4Sbill 954bda8b2fSkarels /* CBLOCK is the size of a clist block, must be power of 2 */ 964bda8b2fSkarels #define CBLOCK 64 974bda8b2fSkarels #define CBSIZE (CBLOCK - sizeof(struct cblock *)) /* data chars/clist */ 984bda8b2fSkarels #define CROUND (CBLOCK - 1) /* clist rounding */ 995db792e4Sbill 10083a906b7Skarels #ifndef KERNEL 10183a906b7Skarels #include <sys/types.h> 10283a906b7Skarels #else 10383a906b7Skarels #ifndef LOCORE 10483a906b7Skarels #include "types.h" 10583a906b7Skarels #endif 10683a906b7Skarels #endif 10783a906b7Skarels 1085db792e4Sbill /* 109389af1dfSmckusic * File system parameters and macros. 110389af1dfSmckusic * 111389af1dfSmckusic * The file system is made out of blocks of at most MAXBSIZE units, 112389af1dfSmckusic * with smaller units (fragments) only in the last direct block. 113389af1dfSmckusic * MAXBSIZE primarily determines the size of buffers in the buffer 114389af1dfSmckusic * pool. It may be made larger without any effect on existing 115389af1dfSmckusic * file systems; however making it smaller make make some file 116389af1dfSmckusic * systems unmountable. 117389af1dfSmckusic * 118389af1dfSmckusic * Note that the blocked devices are assumed to have DEV_BSIZE 119389af1dfSmckusic * "sectors" and that fragments must be some multiple of this size. 12091d57239Smckusick * Block devices are read in BLKDEV_IOSIZE units. This number must 12191d57239Smckusick * be a power of two and in the range of 12291d57239Smckusick * DEV_BSIZE <= BLKDEV_IOSIZE <= MAXBSIZE 12391d57239Smckusick * This size has no effect upon the file system, but is usually set 12491d57239Smckusick * to the block size of the root file system, so as to maximize the 12591d57239Smckusick * speed of ``fsck''. 126389af1dfSmckusic */ 127389af1dfSmckusic #define MAXBSIZE 8192 128389af1dfSmckusic #define DEV_BSIZE 512 129c6047a37Ssam #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 1301641975aSsam #define BLKDEV_IOSIZE 2048 131389af1dfSmckusic #define MAXFRAG 8 132389af1dfSmckusic 133c6047a37Ssam #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 134c6047a37Ssam ((unsigned)(bytes) >> DEV_BSHIFT) 135c6047a37Ssam #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 136c6047a37Ssam ((unsigned)(db) << DEV_BSHIFT) 137c6047a37Ssam 138389af1dfSmckusic /* 139edc472f6Skre * Map a ``block device block'' to a file system block. 140edc472f6Skre * This should be device dependent, and will be after we 141edc472f6Skre * add an entry to cdevsw for that purpose. For now though 142edc472f6Skre * just use DEV_BSIZE. 143edc472f6Skre */ 144b481cdefSroot #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 145edc472f6Skre 146edc472f6Skre /* 147389af1dfSmckusic * MAXPATHLEN defines the longest permissable path length 148389af1dfSmckusic * after expanding symbolic links. It is used to allocate 149389af1dfSmckusic * a temporary buffer from the buffer pool in which to do the 150389af1dfSmckusic * name expansion, hence should be a power of two, and must 151389af1dfSmckusic * be less than or equal to MAXBSIZE. 152389af1dfSmckusic * MAXSYMLINKS defines the maximum number of symbolic links 153389af1dfSmckusic * that may be expanded in a path name. It should be set high 154389af1dfSmckusic * enough to allow all legitimate uses, but halt infinite loops 155389af1dfSmckusic * reasonably quickly. 156389af1dfSmckusic */ 157389af1dfSmckusic #define MAXPATHLEN 1024 158389af1dfSmckusic #define MAXSYMLINKS 8 159389af1dfSmckusic 160389af1dfSmckusic /* 161389af1dfSmckusic * bit map related macros 162389af1dfSmckusic */ 163389af1dfSmckusic #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) 164389af1dfSmckusic #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) 165389af1dfSmckusic #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) 166389af1dfSmckusic #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) 167389af1dfSmckusic 168389af1dfSmckusic /* 169389af1dfSmckusic * Macros for fast min/max. 170389af1dfSmckusic */ 171389af1dfSmckusic #define MIN(a,b) (((a)<(b))?(a):(b)) 172389af1dfSmckusic #define MAX(a,b) (((a)>(b))?(a):(b)) 173389af1dfSmckusic 174389af1dfSmckusic /* 175389af1dfSmckusic * Macros for counting and rounding. 176389af1dfSmckusic */ 17783a906b7Skarels #ifndef howmany 178389af1dfSmckusic #define howmany(x, y) (((x)+((y)-1))/(y)) 17983a906b7Skarels #endif 180389af1dfSmckusic #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) 181c446e4efSbloom 182c446e4efSbloom /* 18335500b57Skarels * Maximum size of hostname recognized and stored in the kernel. 184c446e4efSbloom */ 18535500b57Skarels #define MAXHOSTNAMELEN 64 186