StdLib/Include/X64/machine/param.h

   1 /** @file
   2     Machine dependent constants for the Intel64 Architecture(X64).
   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  *  $NetBSD: param.h,v 1.3 2006/08/28 13:43:35 yamt Exp
  14 **/
  15 #ifndef _X64_PARAM_H_
  16 #define _X64_PARAM_H_
  17
  18 #define _MACHINE      amd64
  19 #define MACHINE       "amd64"
  20 #define _MACHINE_ARCH x86_64
  21 #define MACHINE_ARCH  "x86_64"
  22 #define MID_MACHINE   MID_X86_64
  23
  24 /*
  25  * Round p (pointer or byte index) up to a correctly-aligned value
  26  * for all data types (int, long, ...).   The result is u_int and
  27  * must be cast to any desired pointer type.
  28  *
  29  * ALIGNED_POINTER is a boolean macro that checks whether an address
  30  * is valid to fetch data elements of type t from on this architecture.
  31  * This does not reflect the optimal alignment, just the possibility
  32  * (within reasonable limits).
  33  *
  34  */
  35 #define ALIGNBYTES            (sizeof(INT64) - 1)
  36 #define ALIGN(p)              (((UINT64)(p) + ALIGNBYTES) &~ALIGNBYTES)
  37 #define ALIGNED_POINTER(p,t)  1
  38
  39 #define ALIGNBYTES32          (sizeof(INT32) - 1)
  40 #define ALIGN32(p)            (((UINT64)(p) + ALIGNBYTES32) &~ALIGNBYTES32)
  41
  42 #define PGSHIFT       12    /* LOG2(NBPG) */
  43 #define NBPG          (1 << PGSHIFT)  /* bytes/page */
  44 #define PGOFSET       (NBPG-1)  /* byte offset into page */
  45 #define NPTEPG        (NBPG/(sizeof (pt_entry_t)))
  46
  47 #define DEV_BSHIFT    9   /* log2(DEV_BSIZE) */
  48 #define DEV_BSIZE     (1 << DEV_BSHIFT)
  49 #define BLKDEV_IOSIZE 2048
  50 #ifndef MAXPHYS
  51   #define MAXPHYS     (64 * 1024) /* max raw I/O transfer size */
  52 #endif
  53
  54 #define SSIZE         1                 /* initial stack size/NBPG */
  55 #define SINCR         1                 /* increment of stack/NBPG */
  56 #define UPAGES        5                 /* pages of u-area */
  57 #define USPACE        (UPAGES * NBPG)   /* total size of u-area */
  58
  59 #ifndef MSGBUFSIZE
  60   #define MSGBUFSIZE  4*NBPG          /* default message buffer size */
  61 #endif
  62
  63 /*
  64  * Constants related to network buffer management.
  65  * MCLBYTES must be no larger than NBPG (the software page size), and,
  66  * on machines that exchange pages of input or output buffers with mbuf
  67  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
  68  * of the hardware page size.
  69  */
  70 #define MSIZE         512   /* size of an mbuf */
  71
  72 #ifndef MCLSHIFT
  73   #define MCLSHIFT    11    /* convert bytes to m_buf clusters */
  74             /* 2K cluster can hold Ether frame */
  75 #endif  /* MCLSHIFT */
  76
  77 #define MCLBYTES      (1 << MCLSHIFT) /* size of a m_buf cluster */
  78
  79 #ifndef NMBCLUSTERS
  80   #ifdef GATEWAY
  81     #define NMBCLUSTERS 4096    /* map size, max cluster allocation */
  82   #else
  83     #define NMBCLUSTERS 2048    /* map size, max cluster allocation */
  84   #endif
  85 #endif
  86
  87 #ifndef NFS_RSIZE
  88   #define NFS_RSIZE     32768
  89 #endif
  90 #ifndef NFS_WSIZE
  91   #define NFS_WSIZE     32768
  92 #endif
  93
  94 #define x86_round_page(x) ((((EFI_ULONG_T)(x)) + PGOFSET) & ~PGOFSET)
  95 #define x86_trunc_page(x)   ((EFI_ULONG_T)(x) & ~PGOFSET)
  96 #define x86_btop(x)         ((EFI_ULONG_T)(x) >> PGSHIFT)
  97 #define x86_ptob(x)         ((EFI_ULONG_T)(x) << PGSHIFT)
  98
  99 #define btop(x)           x86_btop(x)
 100 #define ptob(x)           x86_ptob(x)
 101 #define round_pdr(x)      x86_round_pdr(x)
 102
 103 #define mstohz(ms) ((ms + 0UL) * hz / 1000)
 104
 105 #endif  /* _X64_PARAM_H_ */