reactos/drivers/lib/oskittcp/include/freebsd/src/sys/sys/param.h

   1 /*-
   2  * Copyright (c) 1982, 1986, 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  *      @(#)param.h     8.2 (Berkeley) 1/21/94
  39  */
  40
  41 #ifndef _SYS_PARAM_H_
  42 #define _SYS_PARAM_H_
  43
  44 #define BSD     199306          /* System version (year & month). */
  45 #define BSD4_3  1
  46 #define BSD4_4  1
  47
  48 #ifndef NULL
  49 #define NULL    0
  50 #endif
  51
  52 #ifndef LOCORE
  53 #include <sys/types.h>
  54 #endif
  55
  56 /*
  57  * Machine-independent constants (some used in following include files).
  58  * Redefined constants are from POSIX 1003.1 limits file.
  59  *
  60  * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
  61  * MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
  62  */
  63 #include <sys/syslimits.h>
  64
  65 #define MAXCOMLEN       16              /* max command name remembered */
  66 #define MAXINTERP       32              /* max interpreter file name length */
  67 #define MAXLOGNAME      12              /* max login name length */
  68 #define MAXUPRC         CHILD_MAX       /* max simultaneous processes */
  69 #define NCARGS          ARG_MAX         /* max bytes for an exec function */
  70 #define NGROUPS         NGROUPS_MAX     /* max number groups */
  71 #define NOFILE          OPEN_MAX        /* max open files per process */
  72 #define NOGROUP         65535           /* marker for empty group set member */
  73 #define MAXHOSTNAMELEN  256             /* max hostname size */
  74
  75 /* More types and definitions used throughout the kernel. */
  76 #ifdef KERNEL
  77 #include <sys/cdefs.h>
  78 #include <sys/errno.h>
  79 #include <sys/time.h>
  80 #include <sys/resource.h>
  81 #include <sys/ucred.h>
  82 #include <sys/uio.h>
  83 #include <sys/rtprio.h>
  84 #endif
  85
  86 /* Signals. */
  87 #include <sys/signal.h>
  88
  89 /* Machine type dependent parameters. */
  90 #include <machine/param.h>
  91 #include <machine/limits.h>
  92
  93 /*
  94  * Priorities.  Note that with 32 run queues, differences less than 4 are
  95  * insignificant.
  96  */
  97 #define PSWP    0
  98 #define PVM     4
  99 #define PINOD   8
 100 #define PRIBIO  16
 101 #define PVFS    20
 102 #define PZERO   22              /* No longer magic, shouldn't be here.  XXX */
 103 #define PSOCK   24
 104 #define PWAIT   32
 105 #define PLOCK   36
 106 #define PPAUSE  40
 107 #define PUSER   50
 108 #define MAXPRI  127             /* Priorities range from 0 through MAXPRI. */
 109
 110 #define PRIMASK 0x0ff
 111 #define PCATCH  0x100           /* OR'd with pri for tsleep to check signals */
 112
 113 #define NZERO   0               /* default "nice" */
 114
 115 #define NBPW    sizeof(int)     /* number of bytes per word (integer) */
 116
 117 #define CMASK   022             /* default file mask: S_IWGRP|S_IWOTH */
 118 #define NODEV   (dev_t)(-1)     /* non-existent device */
 119
 120 /*
 121  * Clustering of hardware pages on machines with ridiculously small
 122  * page sizes is done here.  The paging subsystem deals with units of
 123  * CLSIZE pte's describing NBPG (from machine/machparam.h) pages each.
 124  */
 125 #define CLBYTES         (CLSIZE*NBPG)
 126 #define CLOFSET         (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */
 127 #define claligned(x)    ((((int)(x))&CLOFSET)==0)
 128 #define CLOFF           CLOFSET
 129 #define CLSHIFT         (PGSHIFT+CLSIZELOG2)
 130
 131 #if CLSIZE==1
 132 #define clbase(i)       (i)
 133 #define clrnd(i)        (i)
 134 #else
 135 /* Give the base virtual address (first of CLSIZE). */
 136 #define clbase(i)       ((i) &~ (CLSIZE-1))
 137 /* Round a number of clicks up to a whole cluster. */
 138 #define clrnd(i)        (((i) + (CLSIZE-1)) &~ (CLSIZE-1))
 139 #endif
 140
 141 #define CBLOCK  128             /* Clist block size, must be a power of 2. */
 142 #define CBQSIZE (CBLOCK/NBBY)   /* Quote bytes/cblock - can do better. */
 143                                 /* Data chars/clist. */
 144 #define CBSIZE  (CBLOCK - sizeof(struct cblock *) - CBQSIZE)
 145 #define CROUND  (CBLOCK - 1)    /* Clist rounding. */
 146
 147 /*
 148  * File system parameters and macros.
 149  *
 150  * The file system is made out of blocks of at most MAXBSIZE units, with
 151  * smaller units (fragments) only in the last direct block.  MAXBSIZE
 152  * primarily determines the size of buffers in the buffer pool.  It may be
 153  * made larger without any effect on existing file systems; however making
 154  * it smaller make make some file systems unmountable.  Also, MAXBSIZE
 155  * must be less than MAXPHYS!!!
 156  */
 157 #define MAXBSIZE        16384
 158 #define MAXFRAG         8
 159
 160 /*
 161  * MAXPATHLEN defines the longest permissable path length after expanding
 162  * symbolic links. It is used to allocate a temporary buffer from the buffer
 163  * pool in which to do the name expansion, hence should be a power of two,
 164  * and must be less than or equal to MAXBSIZE.  MAXSYMLINKS defines the
 165  * maximum number of symbolic links that may be expanded in a path name.
 166  * It should be set high enough to allow all legitimate uses, but halt
 167  * infinite loops reasonably quickly.
 168  */
 169 #define MAXPATHLEN      PATH_MAX
 170 #define MAXSYMLINKS     32
 171
 172 /* Bit map related macros. */
 173 #define setbit(a,i)     ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
 174 #define clrbit(a,i)     ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
 175 #define isset(a,i)      ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
 176 #define isclr(a,i)      (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
 177
 178 /* Macros for counting and rounding. */
 179 #ifndef howmany
 180 #define howmany(x, y)   (((x)+((y)-1))/(y))
 181 #endif
 182 #define rounddown(x, y) (((x)/(y))*(y))
 183 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
 184 #define powerof2(x)     ((((x)-1)&(x))==0)
 185
 186 /* Macros for min/max. */
 187 #ifndef KERNEL
 188 #define MIN(a,b) (((a)<(b))?(a):(b))
 189 #define MAX(a,b) (((a)>(b))?(a):(b))
 190 #endif
 191
 192 /*
 193  * Constants for setting the parameters of the kernel memory allocator.
 194  *
 195  * 2 ** MINBUCKET is the smallest unit of memory that will be
 196  * allocated. It must be at least large enough to hold a pointer.
 197  *
 198  * Units of memory less or equal to MAXALLOCSAVE will permanently
 199  * allocate physical memory; requests for these size pieces of
 200  * memory are quite fast. Allocations greater than MAXALLOCSAVE must
 201  * always allocate and free physical memory; requests for these
 202  * size allocations should be done infrequently as they will be slow.
 203  *
 204  * Constraints: CLBYTES <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and
 205  * MAXALLOCSIZE must be a power of two.
 206  */
 207 #define MINBUCKET       4               /* 4 => min allocation of 16 bytes */
 208 #define MAXALLOCSAVE    (2 * CLBYTES)
 209
 210 /*
 211  * Scale factor for scaled integers used to count %cpu time and load avgs.
 212  *
 213  * The number of CPU `tick's that map to a unique `%age' can be expressed
 214  * by the formula (1 / (2 ^ (FSHIFT - 11))).  The maximum load average that
 215  * can be calculated (assuming 32 bits) can be closely approximated using
 216  * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).
 217  *
 218  * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age',
 219  * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024.
 220  */
 221 #undef FSHIFT
 222 #define FSHIFT  11              /* bits to right of fixed binary point */
 223 #define FSCALE  (1<<FSHIFT)
 224
 225 #endif