1*e74c57f3Ssam /* param.h 4.31 83/03/31 */ 25db792e4Sbill 35db792e4Sbill /* 4b481cdefSroot * Macine type dependent parameters. 55db792e4Sbill */ 68a98aca3Ssam #ifdef KERNEL 78a98aca3Ssam #include "../machine/param.h" 88a98aca3Ssam #else 98a98aca3Ssam #include <machine/param.h> 10b481cdefSroot #endif 115db792e4Sbill 12b481cdefSroot #define NPTEPG (NBPG/(sizeof (struct pte))) 13b481cdefSroot 14b481cdefSroot /* 15b481cdefSroot * Machine-independent constants 16b481cdefSroot */ 1716850871Sbill #define NMOUNT 15 /* number of mountable file systems */ 1816850871Sbill #define MSWAPX 15 /* pseudo mount table index for swapdev */ 195db792e4Sbill #define MAXUPRC 25 /* max processes per user */ 205db792e4Sbill #define NOFILE 20 /* max open files per process */ 2145ac661dSwnj /* NOFILE MUST NOT BE >= 31; SEE pte.h */ 225db792e4Sbill #define CANBSIZ 256 /* max size of typewriter line */ 235eb5d423Sbill #define NCARGS 10240 /* # characters in exec arglist */ 24bee83e50Ssam #define NGROUPS 8 /* max number groups */ 2545ac661dSwnj 26*e74c57f3Ssam #define NOGROUP -1 /* marker for empty group set member */ 27*e74c57f3Ssam 285db792e4Sbill /* 29b481cdefSroot * Priorities 305db792e4Sbill */ 315db792e4Sbill #define PSWP 0 325db792e4Sbill #define PINOD 10 335db792e4Sbill #define PRIBIO 20 345db792e4Sbill #define PRIUBA 24 355db792e4Sbill #define PZERO 25 365db792e4Sbill #define PPIPE 26 375db792e4Sbill #define PWAIT 30 38bea46c20Ssam #define PLOCK 35 395db792e4Sbill #define PSLEP 40 405db792e4Sbill #define PUSER 50 415db792e4Sbill 425db792e4Sbill #define NZERO 20 435db792e4Sbill 445db792e4Sbill /* 45b481cdefSroot * Signals 465db792e4Sbill */ 4746cc71adSbill #ifndef NSIG 4846cc71adSbill #include <signal.h> 4946cc71adSbill #endif 50c6983186Sbill 5103c2128fSroot #define ISSIG(p) ((p)->p_sig && \ 5203c2128fSroot ((p)->p_flag&STRC || ((p)->p_sig &~ (p)->p_ignsig)) && issig()) 5303c2128fSroot 54c6983186Sbill /* 55b481cdefSroot * Fundamental constants of the implementation. 56c6983186Sbill */ 57e163c03cSwnj #define NBBY 8 /* number of bits in a byte */ 585db792e4Sbill #define NBPW sizeof(int) /* number of bytes in an integer */ 595db792e4Sbill 605db792e4Sbill #define NULL 0 615db792e4Sbill #define CMASK 0 /* default mask for file creation */ 625db792e4Sbill #define NODEV (dev_t)(-1) 635db792e4Sbill 645db792e4Sbill /* 655db792e4Sbill * Clustering of hardware pages on machines with ridiculously small 665db792e4Sbill * page sizes is done here. The paging subsystem deals with units of 675db792e4Sbill * CLSIZE pte's describing NBPG (from vm.h) pages each... BSIZE must 685db792e4Sbill * be CLSIZE*NBPG in the current implementation, that is the paging subsystem 695db792e4Sbill * deals with the same size blocks that the file system uses. 705db792e4Sbill * 715db792e4Sbill * NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE 725db792e4Sbill */ 73248881f8Swnj #define CLBYTES (CLSIZE*NBPG) 74e163c03cSwnj #define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */ 75248881f8Swnj #define claligned(x) ((((int)(x))&CLOFSET)==0) 76248881f8Swnj #define CLOFF CLOFSET 77b481cdefSroot #define CLSHIFT (PGSHIFT+CLSIZELOG2) 785db792e4Sbill 79b481cdefSroot #if CLSIZE==1 80b481cdefSroot #define clbase(i) (i) 81b481cdefSroot #define clrnd(i) (i) 82b481cdefSroot #else 835db792e4Sbill /* give the base virtual address (first of CLSIZE) */ 845db792e4Sbill #define clbase(i) ((i) &~ (CLSIZE-1)) 855db792e4Sbill /* round a number of clicks up to a whole cluster */ 865db792e4Sbill #define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1)) 87b481cdefSroot #endif 885db792e4Sbill 895db792e4Sbill #ifndef INTRLVE 905db792e4Sbill /* macros replacing interleaving functions */ 915db792e4Sbill #define dkblock(bp) ((bp)->b_blkno) 925db792e4Sbill #define dkunit(bp) (minor((bp)->b_dev) >> 3) 935db792e4Sbill #endif 945db792e4Sbill 955db792e4Sbill #define CBSIZE 28 /* number of chars in a clist block */ 965db792e4Sbill #define CROUND 0x1F /* clist rounding; sizeof(int *) + CBSIZE -1*/ 975db792e4Sbill 98e0ff83f9Swnj #ifndef KERNEL 99e0ff83f9Swnj #include <sys/types.h> 100e0ff83f9Swnj #else 10172d10768Ssam #ifndef LOCORE 102e0ff83f9Swnj #include "../h/types.h" 103e0ff83f9Swnj #endif 10472d10768Ssam #endif 10576379a38Sbill 1065db792e4Sbill /* 107389af1dfSmckusic * File system parameters and macros. 108389af1dfSmckusic * 109389af1dfSmckusic * The file system is made out of blocks of at most MAXBSIZE units, 110389af1dfSmckusic * with smaller units (fragments) only in the last direct block. 111389af1dfSmckusic * MAXBSIZE primarily determines the size of buffers in the buffer 112389af1dfSmckusic * pool. It may be made larger without any effect on existing 113389af1dfSmckusic * file systems; however making it smaller make make some file 114389af1dfSmckusic * systems unmountable. 115389af1dfSmckusic * 116389af1dfSmckusic * Note that the blocked devices are assumed to have DEV_BSIZE 117389af1dfSmckusic * "sectors" and that fragments must be some multiple of this size. 11891d57239Smckusick * Block devices are read in BLKDEV_IOSIZE units. This number must 11991d57239Smckusick * be a power of two and in the range of 12091d57239Smckusick * DEV_BSIZE <= BLKDEV_IOSIZE <= MAXBSIZE 12191d57239Smckusick * This size has no effect upon the file system, but is usually set 12291d57239Smckusick * to the block size of the root file system, so as to maximize the 12391d57239Smckusick * speed of ``fsck''. 124389af1dfSmckusic */ 125389af1dfSmckusic #define MAXBSIZE 8192 126389af1dfSmckusic #define DEV_BSIZE 512 1271641975aSsam #define BLKDEV_IOSIZE 2048 128389af1dfSmckusic #define MAXFRAG 8 129389af1dfSmckusic 130389af1dfSmckusic /* 131edc472f6Skre * Map a ``block device block'' to a file system block. 132edc472f6Skre * This should be device dependent, and will be after we 133edc472f6Skre * add an entry to cdevsw for that purpose. For now though 134edc472f6Skre * just use DEV_BSIZE. 135edc472f6Skre */ 136b481cdefSroot #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 137edc472f6Skre 138edc472f6Skre /* 139389af1dfSmckusic * MAXPATHLEN defines the longest permissable path length 140389af1dfSmckusic * after expanding symbolic links. It is used to allocate 141389af1dfSmckusic * a temporary buffer from the buffer pool in which to do the 142389af1dfSmckusic * name expansion, hence should be a power of two, and must 143389af1dfSmckusic * be less than or equal to MAXBSIZE. 144389af1dfSmckusic * MAXSYMLINKS defines the maximum number of symbolic links 145389af1dfSmckusic * that may be expanded in a path name. It should be set high 146389af1dfSmckusic * enough to allow all legitimate uses, but halt infinite loops 147389af1dfSmckusic * reasonably quickly. 148389af1dfSmckusic */ 149389af1dfSmckusic #define MAXPATHLEN 1024 150389af1dfSmckusic #define MAXSYMLINKS 8 151389af1dfSmckusic 152389af1dfSmckusic /* 153389af1dfSmckusic * bit map related macros 154389af1dfSmckusic */ 155389af1dfSmckusic #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) 156389af1dfSmckusic #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) 157389af1dfSmckusic #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) 158389af1dfSmckusic #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) 159389af1dfSmckusic 160389af1dfSmckusic /* 161389af1dfSmckusic * Macros for fast min/max. 162389af1dfSmckusic */ 163389af1dfSmckusic #define MIN(a,b) (((a)<(b))?(a):(b)) 164389af1dfSmckusic #define MAX(a,b) (((a)>(b))?(a):(b)) 165389af1dfSmckusic 166389af1dfSmckusic /* 167389af1dfSmckusic * Macros for counting and rounding. 168389af1dfSmckusic */ 169389af1dfSmckusic #define howmany(x, y) (((x)+((y)-1))/(y)) 170389af1dfSmckusic #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) 171