1 /* param.h 3.11 09/14/80 */ 2 3 /* 4 * tunable variables 5 * 6 * NB: NBUF is well known in locore.s 7 */ 8 9 #define NBUF 62 /* size of buffer cache */ 10 #define NINODE 400 /* number of in core inodes */ 11 #define NFILE 350 /* number of in core file structures */ 12 #define NMOUNT 15 /* number of mountable file systems */ 13 #define MSWAPX 15 /* pseudo mount table index for swapdev */ 14 #define MAXUPRC 25 /* max processes per user */ 15 #define SSIZE 4 /* initial stack size (*512 bytes) */ 16 #define SINCR 4 /* increment of stack (*512 bytes) */ 17 #define NOFILE 20 /* max open files per process */ 18 #define CANBSIZ 256 /* max size of typewriter line */ 19 #define SMAPSIZ (4*NPROC) /* size of swap allocation area */ 20 #define NCALL 40 /* max simultaneous time callouts */ 21 #define NPROC 250 /* max number of processes */ 22 #define NTEXT 60 /* max number of pure texts */ 23 #define NCLIST 500 /* max total clist size */ 24 #define HZ 60 /* Ticks/second of the clock */ 25 #define TIMEZONE (8*60) /* Minutes westward from Greenwich */ 26 #define DSTFLAG 1 /* Daylight Saving Time applies in this locality */ 27 #define MSGBUFS 128 /* Characters saved from error messages */ 28 #define NCARGS 10240 /* # characters in exec arglist */ 29 /* 30 * priorities 31 * probably should not be 32 * altered too much 33 */ 34 35 #define PSWP 0 36 #define PINOD 10 37 #define PRIBIO 20 38 #define PRIUBA 24 39 #define PZERO 25 40 #define PPIPE 26 41 #define PWAIT 30 42 #define PSLEP 40 43 #define PUSER 50 44 45 #define NZERO 20 46 47 /* 48 * signals 49 * dont change 50 */ 51 52 #ifndef NSIG 53 #include <signal.h> 54 #endif 55 56 /* 57 * Return values from tsleep(). 58 */ 59 #define TS_OK 0 /* normal wakeup */ 60 #define TS_TIME 1 /* timed-out wakeup */ 61 #define TS_SIG 2 /* asynchronous signal wakeup */ 62 63 /* 64 * fundamental constants of the implementation-- 65 * cannot be changed easily. 66 * note: UPAGES is well known in locore.s 67 */ 68 69 #define NBPW sizeof(int) /* number of bytes in an integer */ 70 71 #define UPAGES 6 /* pages of u-area */ 72 #define NULL 0 73 #define CMASK 0 /* default mask for file creation */ 74 #define NODEV (dev_t)(-1) 75 #define ROOTINO ((ino_t)2) /* i number of all roots */ 76 #define SUPERB ((daddr_t)1) /* block number of the super block */ 77 #define DIRSIZ 14 /* max characters per directory */ 78 79 /* 80 * Clustering of hardware pages on machines with ridiculously small 81 * page sizes is done here. The paging subsystem deals with units of 82 * CLSIZE pte's describing NBPG (from vm.h) pages each... BSIZE must 83 * be CLSIZE*NBPG in the current implementation, that is the paging subsystem 84 * deals with the same size blocks that the file system uses. 85 * 86 * NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE 87 * 88 * NB: CLSIZE is well known in locore.s. 89 */ 90 #define CLSIZE 2 91 92 /* give the base virtual address (first of CLSIZE) */ 93 #define clbase(i) ((i) &~ (CLSIZE-1)) 94 95 /* round a number of clicks up to a whole cluster */ 96 #define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1)) 97 98 #if CLSIZE==1 99 #define BSIZE 512 /* size of secondary block (bytes) */ 100 #define INOPB 8 /* 8 inodes per block */ 101 #define BMASK 0777 /* BSIZE-1 */ 102 #define BSHIFT 9 /* LOG2(BSIZE) */ 103 #define NMASK 0177 /* NINDIR-1 */ 104 #define NSHIFT 7 /* LOG2(NINDIR) */ 105 #define NICINOD 100 /* number of superblock inodes */ 106 #define NICFREE 50 /* number of superblock free blocks */ 107 108 #endif 109 110 #if CLSIZE==2 111 #define BSIZE 1024 112 #define INOPB 16 113 #define BMASK 01777 114 #define BSHIFT 10 115 #define NMASK 0377 116 #define NSHIFT 8 117 #define NICINOD 100 118 #define NICFREE 178 119 #endif 120 121 #if CLSIZE==4 122 #define BSIZE 2048 123 #define INOPB 32 124 #define BMASK 03777 125 #define BSHIFT 11 126 #define NMASK 0777 127 #define NSHIFT 9 128 #define NICINOD 100 129 #define NICFREE 434 130 #endif 131 132 #ifndef INTRLVE 133 /* macros replacing interleaving functions */ 134 #define dkblock(bp) ((bp)->b_blkno) 135 #define dkunit(bp) (minor((bp)->b_dev) >> 3) 136 #endif 137 138 /* inumber to disk address and inumber to disk offset */ 139 #define itod(x) ((daddr_t)((((unsigned)(x)+2*INOPB-1)/INOPB))) 140 #define itoo(x) ((int)(((x)+2*INOPB-1)%INOPB)) 141 142 /* file system blocks to disk blocks and back */ 143 #define fsbtodb(b) ((b)*CLSIZE) 144 #define dbtofsb(b) ((b)/CLSIZE) 145 146 #define NINDIR (BSIZE/sizeof(daddr_t)) 147 148 #define CBSIZE 28 /* number of chars in a clist block */ 149 #define CROUND 0x1F /* clist rounding; sizeof(int *) + CBSIZE -1*/ 150 #define CLKTICK (1000000/(HZ)) /* microseconds in a clock tick */ 151 152 /* 153 * Macros for fast min/max 154 */ 155 #define MIN(a,b) (((a)<(b))?(a):(b)) 156 #define MAX(a,b) (((a)>(b))?(a):(b)) 157 158 /* 159 * Some macros for units conversion 160 */ 161 /* Core clicks (512 bytes) to segments and vice versa */ 162 #define ctos(x) (x) 163 #define stoc(x) (x) 164 165 /* Core clicks (512 bytes) to disk blocks */ 166 #define ctod(x) (x) 167 168 /* clicks to bytes */ 169 #define ctob(x) ((x)<<9) 170 171 /* bytes to clicks */ 172 #define btoc(x) ((((unsigned)(x)+511)>>9)) 173 174 /* major part of a device */ 175 #define major(x) ((int)(((unsigned)(x)>>8)&0377)) 176 177 /* minor part of a device */ 178 #define minor(x) ((int)((x)&0377)) 179 180 /* make a device number */ 181 #define makedev(x,y) ((dev_t)(((x)<<8) | (y))) 182 183 typedef struct { int r[1]; } * physadr; 184 typedef int daddr_t; 185 typedef char * caddr_t; 186 typedef unsigned short ino_t; 187 typedef int swblk_t; 188 typedef int size_t; 189 typedef int time_t; 190 typedef int label_t[14]; 191 typedef short dev_t; 192 typedef int off_t; 193 194 typedef unsigned char u_char; 195 typedef unsigned short u_short; 196 typedef unsigned int u_int; 197 typedef unsigned long u_long; 198 199 /* 200 * Machine-dependent bits and macros 201 */ 202 #define UMODE PSL_CURMOD /* usermode bits */ 203 #define USERMODE(ps) (((ps) & UMODE) == UMODE) 204 205 #define BASEPRI(ps) (((ps) & PSL_IPL) != 0) 206