UefiCpuPkg/ResetVector/Vtf0/Ia32/PageTables64.asm

   1 ;------------------------------------------------------------------------------
   2 ; @file
   3 ; Sets the CR3 register for 64-bit paging
   4 ;
   5 ; Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.<BR>
   6 ; 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 BITS    32
  17
  18 ;
  19 ; Modified:  EAX
  20 ;
  21 SetCr3ForPageTables64:
  22
  23     ;
  24     ; These pages are built into the ROM image by Tools/FixupForRawSection.py
  25     ;
  26     mov     eax, ((ADDR_OF_START_OF_RESET_CODE & ~0xfff) - 0x1000)
  27     mov     cr3, eax
  28
  29     OneTimeCallRet SetCr3ForPageTables64
  30