MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlbGcc.c

   1 /** @file
   2   CpuFlushTlb function for Ia32/X64 GCC.
   3
   4   Copyright (c) 2006 - 2008, Intel Corporation<BR>
   5   Portions copyright (c) 2008-2009 Apple Inc.<BR>
   6   All rights reserved. This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16
  17
  18 /**
  19   Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
  20
  21   Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
  22
  23 **/
  24 VOID
  25 EFIAPI
  26 CpuFlushTlb (
  27   VOID
  28   )
  29 {
  30   __asm__ __volatile__ (
  31     "movl %%cr3, %0\n\t"
  32     "movl %0, %%cr3    "
  33     : "r"  // %0
  34     );
  35 }
  36