StdLib/Include/Ia32/machine/param.h

   1 /** @file
   2     Machine dependent constants for Intel IA32 Architecture.
   3
   4     Copyright (c) 2010-2012, Intel Corporation. All rights reserved.<BR>
   5     This program and the accompanying materials are licensed and made available under
   6     the terms and conditions of the BSD License that accompanies this distribution.
   7     The full text of the license may be found at
   8     http://opensource.org/licenses/bsd-license.
   9
  10     THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11     WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13  * Copyright (c) 1990 The Regents of the University of California.
  14  * All rights reserved.
  15  *
  16  * This code is derived from software contributed to Berkeley by
  17  * William Jolitz.
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions
  21  * are met:
  22  * 1. Redistributions of source code must retain the above copyright
  23  *    notice, this list of conditions and the following disclaimer.
  24  * 2. Redistributions in binary form must reproduce the above copyright
  25  *    notice, this list of conditions and the following disclaimer in the
  26  *    documentation and/or other materials provided with the distribution.
  27  * 3. Neither the name of the University nor the names of its contributors
  28  *    may be used to endorse or promote products derived from this software
  29  *    without specific prior written permission.
  30  *
  31  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  32  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  33  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  34  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  35  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  39  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  40  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  41  * SUCH DAMAGE.
  42  *
  43  *  @(#)param.h 5.8 (Berkeley) 6/28/91
  44  *  $NetBSD: param.h,v 1.61 2006/08/28 13:43:35 yamt Exp
  45  */
  46 #ifndef _I386_PARAM_H_
  47 #define _I386_PARAM_H_
  48
  49 #define _MACHINE      i386
  50 #define MACHINE       "i386"
  51 #define _MACHINE_ARCH i386
  52 #define MACHINE_ARCH  "i386"
  53 #define MID_MACHINE   MID_I386
  54
  55 /*
  56  * Round p (pointer or byte index) up to a correctly-aligned value
  57  * for all data types (int, long, ...).   The result is u_int and
  58  * must be cast to any desired pointer type.
  59  *
  60  * ALIGNED_POINTER is a boolean macro that checks whether an address
  61  * is valid to fetch data elements of type t from on this architecture.
  62  * This does not reflect the optimal alignment, just the possibility
  63  * (within reasonable limits).
  64  *
  65  */
  66 #define ALIGNBYTES            (sizeof(int) - 1)
  67 #define ALIGN(p)              (((EFI_ULONG_T)(p) + ALIGNBYTES) & ~ALIGNBYTES)
  68 #define ALIGNED_POINTER(p,t)  1
  69
  70 #define PGSHIFT     12              /* LOG2(NBPG) */
  71 #define NBPG        (1 << PGSHIFT)  /* bytes/page */
  72 #define PGOFSET     (NBPG-1)        /* byte offset into page */
  73 #define NPTEPG      (NBPG/(sizeof (pt_entry_t)))
  74
  75 #define DEV_BSHIFT      9           /* log2(DEV_BSIZE) */
  76 #define DEV_BSIZE       (1 << DEV_BSHIFT)
  77 #define BLKDEV_IOSIZE   2048
  78 #ifndef MAXPHYS
  79   #define MAXPHYS       (64 * 1024) /* max raw I/O transfer size */
  80 #endif
  81
  82 #define SSIZE   1   /* initial stack size/NBPG */
  83 #define SINCR   1   /* increment of stack/NBPG */
  84
  85 #ifndef UPAGES
  86   #ifdef NOREDZONE
  87     #define UPAGES    2   /* pages of u-area */
  88   #else
  89     #define UPAGES    3
  90   #endif /*NOREDZONE */
  91 #endif /* !defined(UPAGES) */
  92 #define USPACE        (UPAGES * NBPG) /* total size of u-area */
  93
  94 #ifndef MSGBUFSIZE
  95   #define MSGBUFSIZE  4*NBPG          /* default message buffer size */
  96 #endif
  97
  98 /*
  99  * Constants related to network buffer management.
 100  * MCLBYTES must be no larger than NBPG (the software page size), and,
 101  * on machines that exchange pages of input or output buffers with mbuf
 102  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 103  * of the hardware page size.
 104  */
 105 #define MSIZE         256   /* size of an mbuf */
 106
 107 #ifndef MCLSHIFT
 108   #define MCLSHIFT    11    /* convert bytes to m_buf clusters */
 109             /* 2K cluster can hold Ether frame */
 110 #endif  /* MCLSHIFT */
 111
 112 #define MCLBYTES      (1 << MCLSHIFT) /* size of a m_buf cluster */
 113
 114 #ifndef NMBCLUSTERS
 115   #ifdef GATEWAY
 116     #define NMBCLUSTERS 2048    /* map size, max cluster allocation */
 117   #else
 118     #define NMBCLUSTERS 1024    /* map size, max cluster allocation */
 119   #endif
 120 #endif
 121
 122 #ifndef NFS_RSIZE
 123   #define NFS_RSIZE   32768
 124 #endif
 125 #ifndef NFS_WSIZE
 126   #define NFS_WSIZE   32768
 127 #endif
 128
 129 /*
 130  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
 131  * logical pages.
 132  */
 133 #define NKMEMPAGES_MIN_DEFAULT  ((8 * 1024 * 1024) >> PAGE_SHIFT)
 134 #define NKMEMPAGES_MAX_DEFAULT  ((128 * 1024 * 1024) >> PAGE_SHIFT)
 135
 136 /*
 137  * Mach derived conversion macros
 138  */
 139 #define x86_round_pdr(x)  ((((EFI_ULONG_T)(x)) + PDOFSET) & ~PDOFSET)
 140 #define x86_trunc_pdr(x)    ((EFI_ULONG_T)(x) & ~PDOFSET)
 141 #define x86_btod(x)         ((EFI_ULONG_T)(x) >> PDSHIFT)
 142 #define x86_dtob(x)         ((EFI_ULONG_T)(x) << PDSHIFT)
 143 #define x86_round_page(x) ((((EFI_ULONG_T)(x)) + PGOFSET) & ~PGOFSET)
 144 #define x86_trunc_page(x)   ((EFI_ULONG_T)(x) & ~PGOFSET)
 145 #define x86_btop(x)         ((EFI_ULONG_T)(x) >> PGSHIFT)
 146 #define x86_ptob(x)         ((EFI_ULONG_T)(x) << PGSHIFT)
 147
 148 #endif /* _I386_PARAM_H_ */