The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/i386/include/param.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1990 The Regents of the University of California.
    3  * All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * William Jolitz.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by the University of
   19  *      California, Berkeley and its contributors.
   20  * 4. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      from: @(#)param.h       5.8 (Berkeley) 6/28/91
   37  * $FreeBSD: stable/3/sys/i386/include/param.h 50582 1999-08-29 16:07:53Z peter $
   38  */
   39 
   40 #ifndef _MACHINE_PARAM_H_
   41 #define _MACHINE_PARAM_H_
   42 
   43 /*
   44  * Machine dependent constants for Intel 386.
   45  */
   46 #define _MACHINE        i386
   47 #define MACHINE         "i386"
   48 #define _MACHINE_ARCH   i386
   49 #define MACHINE_ARCH    "i386"
   50 #define MID_MACHINE     MID_I386
   51 
   52 /*
   53  * OBJFORMAT_NAMES is a comma-separated list of the object formats
   54  * that are supported on the architecture.
   55  */
   56 #define OBJFORMAT_NAMES         "elf", "aout"
   57 #define OBJFORMAT_DEFAULT       "elf"
   58 
   59 #ifdef SMP
   60 #define NCPUS           2
   61 #else
   62 #define NCPUS           1
   63 #endif
   64 
   65 /*
   66  * Round p (pointer or byte index) up to a correctly-aligned value
   67  * for all data types (int, long, ...).   The result is unsigned int
   68  * and must be cast to any desired pointer type.
   69  */
   70 #define ALIGNBYTES      (sizeof(int) - 1)
   71 #define ALIGN(p)        (((unsigned)(p) + ALIGNBYTES) & ~ALIGNBYTES)
   72 
   73 #define PAGE_SHIFT      12              /* LOG2(PAGE_SIZE) */
   74 #define PAGE_SIZE       (1<<PAGE_SHIFT) /* bytes/page */
   75 #define PAGE_MASK       (PAGE_SIZE-1)
   76 #define NPTEPG          (PAGE_SIZE/(sizeof (pt_entry_t)))
   77 
   78 #define NPDEPG          (PAGE_SIZE/(sizeof (pd_entry_t)))
   79 #define PDRSHIFT        22              /* LOG2(NBPDR) */
   80 #define NBPDR           (1<<PDRSHIFT)   /* bytes/page dir */
   81 #define PDRMASK         (NBPDR-1)
   82 
   83 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
   84 #define DEV_BSIZE       (1<<DEV_BSHIFT)
   85 
   86 #define BLKDEV_IOSIZE   2048
   87 #define DFLTPHYS        (64 * 1024)     /* default max raw I/O transfer size */
   88 #define MAXPHYS         (128 * 1024)    /* max raw I/O transfer size */
   89 
   90 #define IOPAGES 2               /* pages of i/o permission bitmap */
   91 #define UPAGES  2               /* pages of u-area */
   92 #define UPAGES_HOLE     2       /* pages of "hole" at top of user space where */
   93                                 /* the upages used to be. DO NOT CHANGE! */
   94 
   95 /*
   96  * Constants related to network buffer management.
   97  * MCLBYTES must be no larger than CLBYTES (the software page size), and,
   98  * on machines that exchange pages of input or output buffers with mbuf
   99  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
  100  * of the hardware page size.
  101  */
  102 #ifndef MSIZE
  103 #define MSIZE           128             /* size of an mbuf */
  104 #endif  /* MSIZE */
  105 
  106 #ifndef MCLSHIFT
  107 #define MCLSHIFT        11              /* convert bytes to m_buf clusters */
  108 #endif  /* MCLSHIFT */
  109 #define MCLBYTES        (1 << MCLSHIFT) /* size of an m_buf cluster */
  110 #define MCLOFSET        (MCLBYTES - 1)  /* offset within an m_buf cluster */
  111 
  112 /*
  113  * Some macros for units conversion
  114  */
  115 
  116 /* clicks to bytes */
  117 #define ctob(x) ((x)<<PAGE_SHIFT)
  118 
  119 /* bytes to clicks */
  120 #define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT)
  121 
  122 /*
  123  * btodb() is messy and perhaps slow because `bytes' may be an off_t.  We
  124  * want to shift an unsigned type to avoid sign extension and we don't
  125  * want to widen `bytes' unnecessarily.  Assume that the result fits in
  126  * a daddr_t.
  127  */
  128 #define btodb(bytes)                    /* calculates (bytes / DEV_BSIZE) */ \
  129         (sizeof (bytes) > sizeof(long) \
  130          ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \
  131          : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT))
  132 
  133 #define dbtob(db)                       /* calculates (db * DEV_BSIZE) */ \
  134         ((off_t)(db) << DEV_BSHIFT)
  135 
  136 /*
  137  * Mach derived conversion macros
  138  */
  139 #define trunc_page(x)           ((x) & ~PAGE_MASK)
  140 #define round_page(x)           (((x) + PAGE_MASK) & ~PAGE_MASK)
  141 #define trunc_4mpage(x)         ((unsigned)(x) & ~PDRMASK)
  142 #define round_4mpage(x)         ((((unsigned)(x)) + PDRMASK) & ~PDRMASK)
  143 
  144 #define atop(x)                 ((unsigned)(x) >> PAGE_SHIFT)
  145 #define ptoa(x)                 ((unsigned)(x) << PAGE_SHIFT)
  146 
  147 #define i386_btop(x)            ((unsigned)(x) >> PAGE_SHIFT)
  148 #define i386_ptob(x)            ((unsigned)(x) << PAGE_SHIFT)
  149 
  150 #endif /* !_MACHINE_PARAM_H_ */

Cache object: a185d7d5d3d61ee3718319b2a6a80429


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.