usr/src/lib/libbc/inc/include/sys/param.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #ifndef __sys_param_h
  30 #define __sys_param_h
  31
  32 /*
  33  * Machine type dependent parameters.
  34  */
  35 #include <machine/param.h>
  36
  37 #define NPTEPG          (NBPG/(sizeof (struct pte)))
  38
  39 /*
  40  * Machine-independent constants
  41  */
  42 #define NMOUNT  40              /* est. of # mountable fs for quota calc */
  43 #define MSWAPX  15              /* pseudo mount table index for swapdev */
  44 #define MAXUPRC 25              /* max processes per user */
  45 #define NOFILE  256             /* max open files per process */
  46 #define MAXPID  30000           /* max process id */
  47 #define MAXUID  0xfffd          /* max user id (from 60000)  */
  48 #define MAXLINK 32767           /* max links */
  49 #define CANBSIZ 256             /* max size of typewriter line */
  50 #define VDISABLE 0              /* use this to turn off c_cc[i] */
  51 #define PIPE_BUF 4096           /* pipe buffer size */
  52 #ifndef KERNEL
  53 /*
  54  * HZ defines the ticks/second for system calls, eg, times(), which
  55  * return values just in ticks; but not for getrusage(), which returns
  56  * values in ticks*pages.  HZ *must* be 60 for compatibility reasons.
  57  */
  58 #define HZ      60
  59 #endif
  60 #define NCARGS  0x100000        /* (absolute) max # characters in exec arglist */
  61 /* If NGROUPS changes, change <sys/limits.h> NGROUPS_MAX at the same time. */
  62 #define NGROUPS 16              /* max number groups */
  63
  64 #define NOGROUP -1              /* marker for empty group set member */
  65
  66 #ifdef  KERNEL
  67 /*
  68  * Priorities
  69  */
  70 #define PMASK   0177
  71 #define PCATCH  0400            /* return if sleep interrupted, don't longjmp */
  72 #define PSWP    0
  73 #define PINOD   10
  74 #define PAMAP   10
  75 #define PRIBIO  20
  76 #define PRIUBA  24
  77 #define PZERO   25
  78 #define PPIPE   26
  79 #define PVFS    27
  80 #define PWAIT   30
  81 #define PLOCK   35
  82 #define PSLEP   40
  83
  84 #ifdef  VPIX
  85 #define PV86    41
  86 #endif
  87
  88 #define PFLCK   42      /* File/Record lock */
  89
  90 #define PUSER   50
  91
  92 #define NZERO   20
  93 #endif  /* KERNEL */
  94
  95 /*
  96  * Signals
  97  */
  98 #include <sys/signal.h>
  99
 100 #define ISSIG(p, flag) \
 101         ((p)->p_sig && ((p)->p_flag&STRC || \
 102          ((p)->p_sig &~ ((p)->p_sigignore | (p)->p_sigmask))) && issig(flag))
 103
 104 #define NBPW    sizeof (int)    /* number of bytes in an integer */
 105
 106 #ifndef NULL
 107 #define NULL    0
 108 #endif
 109 #define CMASK   0               /* default mask for file creation */
 110 #define NODEV   (dev_t)(-1)
 111
 112 #ifndef INTRLVE
 113 /* macros replacing interleaving functions */
 114 #define dkblock(bp)     ((bp)->b_blkno)
 115 #define dkunit(bp)      (minor((bp)->b_dev) >> 3)
 116 #endif
 117
 118 #define CBSIZE  28              /* number of chars in a clist block */
 119 #define CROUND  0x1F            /* clist rounding; sizeof (int *) + CBSIZE-1 */
 120
 121 #if     !defined(LOCORE) || !defined(KERNEL)
 122 #include <sys/types.h>
 123 #endif
 124
 125 /*
 126  * File system parameters and macros.
 127  *
 128  * The file system is made out of blocks of at most MAXBSIZE units,
 129  * with smaller units (fragments) only in the last direct block.
 130  * MAXBSIZE primarily determines the size of buffers in the buffer
 131  * pool. It may be made larger without any effect on existing
 132  * file systems; however making it smaller make make some file
 133  * systems unmountable.
 134  *
 135  * Note that the blocked devices are assumed to have DEV_BSIZE
 136  * "sectors" and that fragments must be some multiple of this size.
 137  */
 138 #define MAXBSIZE        8192
 139 #define DEV_BSIZE       512
 140 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
 141 #define MAXFRAG         8
 142
 143 #define btodb(bytes)                    /* calculates (bytes / DEV_BSIZE) */ \
 144         ((unsigned)(bytes) >> DEV_BSHIFT)
 145 #define dbtob(db)                       /* calculates (db * DEV_BSIZE) */ \
 146         ((unsigned)(db) << DEV_BSHIFT)
 147
 148 /*
 149  * Map a ``block device block'' to a file system block.
 150  * XXX - this is currently only being used for tape drives.
 151  */
 152 #define BLKDEV_IOSIZE   2048
 153 #define bdbtofsb(bn)    ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
 154
 155 /*
 156  * MAXPATHLEN defines the longest permissable path length,
 157  * including the terminating null, after expanding symbolic links.
 158  * MAXSYMLINKS defines the maximum number of symbolic links
 159  * that may be expanded in a path name. It should be set high
 160  * enough to allow all legitimate uses, but halt infinite loops
 161  * reasonably quickly.
 162  */
 163 #define MAXPATHLEN      1024
 164 #define MAXSYMLINKS     20
 165
 166 /*
 167  * bit map related macros
 168  */
 169 #define setbit(a,i)     ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
 170 #define clrbit(a,i)     ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
 171 #define isset(a,i)      ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
 172 #define isclr(a,i)      (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
 173
 174 /*
 175  * Macros for fast min/max.
 176  */
 177 #ifndef MIN
 178 #define MIN(a,b) (((a)<(b))?(a):(b))
 179 #endif
 180 #ifndef MAX
 181 #define MAX(a,b) (((a)>(b))?(a):(b))
 182 #endif
 183
 184 /*
 185  * Macros for counting and rounding.
 186  */
 187 #ifdef  sun386
 188 #define howmany(x, y)   ((((u_int)(x))+(((u_int)(y))-1))/((u_int)(y)))
 189 #define roundup(x, y)   ((((u_int)(x)+((u_int)(y)-1))/(u_int)(y))*(u_int)(y))
 190 #else
 191 #define howmany(x, y)   (((x)+((y)-1))/(y))
 192 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
 193 #endif
 194
 195 /*
 196  * Scale factor for scaled integers used to count
 197  * %cpu time and load averages.
 198  */
 199 #define FSHIFT  8               /* bits to right of fixed binary point */
 200 #define FSCALE  (1<<FSHIFT)
 201
 202 /*
 203  * Maximum size of hostname recognized and stored in the kernel.
 204  */
 205 #define MAXHOSTNAMELEN  64
 206
 207 #endif  /* !__sys_param_h */