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

   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  */
  38
  39 #ifndef _MACHINE_PARAM_H_
  40 #define _MACHINE_PARAM_H_
  41
  42 /*
  43  * Machine dependent constants for Intel 386.
  44  */
  45
  46 #define MACHINE         "i386"
  47 #define MID_MACHINE     MID_I386
  48
  49 /*
  50  * Round p (pointer or byte index) up to a correctly-aligned value
  51  * for all data types (int, long, ...).   The result is unsigned int
  52  * and must be cast to any desired pointer type.
  53  */
  54 #define ALIGNBYTES      (sizeof(int) - 1)
  55 #define ALIGN(p)        (((unsigned)(p) + ALIGNBYTES) & ~ALIGNBYTES)
  56
  57 #ifndef PAGE_SIZE
  58 /* XXX PGSHIFT and PG_SHIFT are two names for the same thing */
  59 #define PGSHIFT         12              /* LOG2(NBPG) */
  60 #define PAGE_SHIFT      12
  61 #define NBPG            (1 << PAGE_SHIFT)       /* bytes/page */
  62 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  63 #define PAGE_MASK       (PAGE_SIZE-1)
  64 #define PGOFSET         (NBPG-1)        /* byte offset into page */
  65 #define NPTEPG          (NBPG/(sizeof (pt_entry_t)))
  66 #endif
  67
  68 /* XXX PDRSHIFT and PD_SHIFT are two names for the same thing */
  69 #define PDRSHIFT        22              /* LOG2(NBPDR) */
  70 #define NBPDR           (1 << PDRSHIFT) /* bytes/page dir */
  71 #define PDROFSET        (NBPDR-1)       /* byte offset into page dir */
  72
  73 /*
  74  * XXX This should really be KPTDPTDI << PDRSHIFT, but since KPTDPTDI is
  75  * defined in pmap.h which is included after this we can't do that
  76  * (YET!)
  77  */
  78 #define BTOPKERNBASE    (KERNBASE >> PGSHIFT)
  79
  80 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
  81 #define DEV_BSIZE       (1 << DEV_BSHIFT)
  82
  83 #define BLKDEV_IOSIZE   2048
  84 #define MAXPHYS         (64 * 1024)     /* max raw I/O transfer size */
  85
  86 #define CLSIZELOG2      0
  87 #define CLSIZE          (1 << CLSIZELOG2)
  88
  89 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
  90 #define SSIZE   1               /* initial stack size/NBPG */
  91 #define SINCR   1               /* increment of stack/NBPG */
  92
  93 #define UPAGES  2               /* pages of u-area */
  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 /* Core clicks (4096 bytes) to segments and vice versa */
 116 #define ctos(x) (x)
 117 #define stoc(x) (x)
 118
 119 /* Core clicks (4096 bytes) to disk blocks */
 120 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
 121 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
 122 #define dtob(x) ((x)<<DEV_BSHIFT)
 123
 124 /* clicks to bytes */
 125 #define ctob(x) ((x)<<PGSHIFT)
 126
 127 /* bytes to clicks */
 128 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
 129
 130 /*
 131  * This is messy and perhaps slow because `bytes' may be an off_t.  We
 132  * have to shift an unsigned type to avoid sign extension and we don't
 133  * want to widen `bytes' unnecessarily.  Assume that off_t is long long
 134  * and daddr_t is unsigned long.
 135  */
 136 #define btodb(bytes)                    /* calculates (bytes / DEV_BSIZE) */ \
 137         (sizeof (bytes) > sizeof(long) \
 138          ? (unsigned long)((unsigned long long)(bytes) >> DEV_BSHIFT) \
 139          : (unsigned long)((unsigned long)(bytes) >> DEV_BSHIFT))
 140 #define dbtob(db)                       /* calculates (db * DEV_BSIZE) */ \
 141         ((unsigned long long)(db) << DEV_BSHIFT)
 142
 143 /*
 144  * Mach derived conversion macros
 145  */
 146 #define trunc_page(x)           ((unsigned)(x) & ~(NBPG-1))
 147 #define round_page(x)           ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
 148
 149 #define atop(x)                 ((unsigned)(x) >> PG_SHIFT)
 150 #define ptoa(x)                 ((unsigned)(x) << PG_SHIFT)
 151
 152 #define i386_round_pdr(x)       ((((unsigned)(x)) + NBPDR - 1) & ~(NBPDR-1))
 153 #define i386_trunc_pdr(x)       ((unsigned)(x) & ~(NBPDR-1))
 154 #define i386_round_page(x)      ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
 155 #define i386_trunc_page(x)      ((unsigned)(x) & ~(NBPG-1))
 156 #define i386_btod(x)            ((unsigned)(x) >> PDRSHIFT)
 157 #define i386_dtob(x)            ((unsigned)(x) << PDRSHIFT)
 158 #define i386_btop(x)            ((unsigned)(x) >> PGSHIFT)
 159 #define i386_ptob(x)            ((unsigned)(x) << PGSHIFT)
 160
 161 #endif /* !_MACHINE_PARAM_H_ */