4.3BSD - /usr/src/etc/dump.4.1/include.4.1/sys/param.h

   1: /*	param.h	4.16	82/03/30	*/
   2: 
   3: /*
   4:  * Tunable variables which do not usually vary per system.
   5:  *
   6:  * The sizes of most system tables are configured
   7:  * into each system description.  The file system buffer
   8:  * cache size is assigned based on available memory.
   9:  * The tables whose sizes don't vary often are given here.
  10:  */
  11: 
  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: /* NOFILE MUST NOT BE >= 31; SEE pte.h */
  19: #define CANBSIZ 256     /* max size of typewriter line */
  20: #define NCARGS  10240       /* # characters in exec arglist */
  21: 
  22: /*
  23:  * priorities
  24:  * probably should not be
  25:  * altered too much
  26:  */
  27: 
  28: #define PSWP    0
  29: #define PINOD   10
  30: #define PRIBIO  20
  31: #define PRIUBA  24
  32: #define PZERO   25
  33: #define PPIPE   26
  34: #define PWAIT   30
  35: #define PSLEP   40
  36: #define PUSER   50
  37: 
  38: #define NZERO   20
  39: 
  40: /*
  41:  * signals
  42:  * dont change
  43:  */
  44: 
  45: #ifndef NSIG
  46: #include "../signal.h"
  47: #endif
  48: 
  49: /*
  50:  * Return values from tsleep().
  51:  */
  52: #define TS_OK   0   /* normal wakeup */
  53: #define TS_TIME 1   /* timed-out wakeup */
  54: #define TS_SIG  2   /* asynchronous signal wakeup */
  55: 
  56: /*
  57:  * fundamental constants of the implementation--
  58:  * cannot be changed easily.
  59:  */
  60: 
  61: #define NBBY        8       /* number of bits in a byte */
  62: #define NBPW        sizeof(int) /* number of bytes in an integer */
  63: #define NBPG        512
  64: #define PGOFSET     (NBPG-1)    /* byte offset into page */
  65: #define PGSHIFT     9       /* LOG2(NBPG) */
  66: 
  67: #define UPAGES  8       /* pages of u-area */
  68: #define NULL    0
  69: #define CMASK   0       /* default mask for file creation */
  70: #define NODEV   (dev_t)(-1)
  71: #define ROOTINO ((ino_t)2)  /* i number of all roots */
  72: #define SUPERB  ((daddr_t)1)    /* block number of the super block */
  73: #define DIRSIZ  14      /* max characters per directory */
  74: #define NGRPS   256     /* max number groups */
  75: 
  76: /*
  77:  * Clustering of hardware pages on machines with ridiculously small
  78:  * page sizes is done here.  The paging subsystem deals with units of
  79:  * CLSIZE pte's describing NBPG (from vm.h) pages each... BSIZE must
  80:  * be CLSIZE*NBPG in the current implementation, that is the paging subsystem
  81:  * deals with the same size blocks that the file system uses.
  82:  *
  83:  * NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE
  84:  */
  85: #define CLSIZE      2
  86: #define CLBYTES     (CLSIZE*NBPG)
  87: #define CLOFSET     (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */
  88: #define claligned(x)    ((((int)(x))&CLOFSET)==0)
  89: #define CLOFF       CLOFSET
  90: #define CLSHIFT     (PGSHIFT+1)
  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: #define DEV_BSIZE 512
  99: #if CLSIZE==1
 100: #define BSIZE   512     /* size of secondary block (bytes) */
 101: #define INOPB   8       /* 8 inodes per block */
 102: #define BMASK   0777        /* BSIZE-1 */
 103: #define BSHIFT  9       /* LOG2(BSIZE) */
 104: #define NMASK   0177        /* NINDIR-1 */
 105: #define NSHIFT  7       /* LOG2(NINDIR) */
 106: #define NICINOD 100     /* number of superblock inodes */
 107: #define NICFREE 50      /* number of superblock free blocks */
 108: 
 109: #endif
 110: 
 111: #if CLSIZE==2
 112: #define BSIZE   1024
 113: #define INOPB   16
 114: #define BMASK   01777
 115: #define BSHIFT  10
 116: #define NMASK   0377
 117: #define NSHIFT  8
 118: #define NICINOD 100
 119: #define NICFREE 178
 120: #endif
 121: 
 122: #if CLSIZE==4
 123: #define BSIZE   2048
 124: #define INOPB   32
 125: #define BMASK   03777
 126: #define BSHIFT  11
 127: #define NMASK   0777
 128: #define NSHIFT  9
 129: #define NICINOD 100
 130: #define NICFREE 434
 131: #endif
 132: 
 133: #ifndef INTRLVE
 134: /* macros replacing interleaving functions */
 135: #define dkblock(bp) ((bp)->b_blkno)
 136: #define dkunit(bp)  (minor((bp)->b_dev) >> 3)
 137: #endif
 138: 
 139: /* inumber to disk address and inumber to disk offset */
 140: #define itod(x) ((daddr_t)((((unsigned)(x)+2*INOPB-1)/INOPB)))
 141: #define itoo(x) ((int)(((x)+2*INOPB-1)%INOPB))
 142: 
 143: /* file system blocks to disk blocks and back */
 144: #define fsbtodb(b)  ((b)*CLSIZE)
 145: #define dbtofsb(b)  ((b)/CLSIZE)
 146: 
 147: #define NINDIR  (BSIZE/sizeof(daddr_t))
 148: 
 149: #define CBSIZE  28      /* number of chars in a clist block */
 150: #define CROUND  0x1F        /* clist rounding; sizeof(int *) + CBSIZE -1*/
 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: #ifndef KERNEL
 175: #include    "types.h"
 176: #else
 177: #include    "../h/types.h"
 178: #endif
 179: 
 180: /*
 181:  * Machine-dependent bits and macros
 182:  */
 183: #define UMODE   PSL_CURMOD      /* usermode bits */
 184: #define USERMODE(ps)    (((ps) & UMODE) == UMODE)
 185: 
 186: #define BASEPRI(ps) (((ps) & PSL_IPL) != 0)
 187: 
 188: /*
 189:  * Provide about n microseconds of delay
 190:  */
 191: #define DELAY(n)    { register int N = (n); while (--N > 0); }

Defined macros

Usage of this include