diff --git a/UefiCpuPkg/ResetVector/Vtf0/Ia32/Flat32ToFlat64.asm b/UefiCpuPkg/ResetVector/Vtf0/Ia32/Flat32ToFlat64.asm index 9eba864c28..62e71da3d5 100644 --- a/UefiCpuPkg/ResetVector/Vtf0/Ia32/Flat32ToFlat64.asm +++ b/UefiCpuPkg/ResetVector/Vtf0/Ia32/Flat32ToFlat64.asm @@ -2,7 +2,7 @@ ; @file ; Transition from 32 bit flat protected mode into 64 bit flat protected mode ; -; Copyright (c) 2008 - 2009, Intel Corporation. All rights reserved.
+; Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.
; This program and the accompanying materials ; are licensed and made available under the terms and conditions of the BSD License ; which accompanies this distribution. The full text of the license may be found at @@ -20,8 +20,7 @@ BITS 32 ; Transition32FlatTo64Flat: - mov eax, ((ADDR_OF_START_OF_RESET_CODE & ~0xfff) - 0x1000) - mov cr3, eax + OneTimeCall SetCr3ForPageTables64 mov eax, cr4 bts eax, 5 ; enable PAE diff --git a/UefiCpuPkg/ResetVector/Vtf0/Ia32/PageTables64.asm b/UefiCpuPkg/ResetVector/Vtf0/Ia32/PageTables64.asm new file mode 100644 index 0000000000..0cfcbae87b --- /dev/null +++ b/UefiCpuPkg/ResetVector/Vtf0/Ia32/PageTables64.asm @@ -0,0 +1,30 @@ +;------------------------------------------------------------------------------ +; @file +; Sets the CR3 register for 64-bit paging +; +; Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.
+; This program and the accompanying materials +; are licensed and made available under the terms and conditions of the BSD License +; which accompanies this distribution. The full text of the license may be found at +; http://opensource.org/licenses/bsd-license.php +; +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +; +;------------------------------------------------------------------------------ + +BITS 32 + +; +; Modified: EAX +; +SetCr3ForPageTables64: + + ; + ; These pages are built into the ROM image by Tools/FixupForRawSection.py + ; + mov eax, ((ADDR_OF_START_OF_RESET_CODE & ~0xfff) - 0x1000) + mov cr3, eax + + OneTimeCallRet SetCr3ForPageTables64 + diff --git a/UefiCpuPkg/ResetVector/Vtf0/ResetVectorCode.asm b/UefiCpuPkg/ResetVector/Vtf0/ResetVectorCode.asm index 96f686b0e6..052c821f21 100644 --- a/UefiCpuPkg/ResetVector/Vtf0/ResetVectorCode.asm +++ b/UefiCpuPkg/ResetVector/Vtf0/ResetVectorCode.asm @@ -2,7 +2,7 @@ ; @file ; This file includes all other code files to assemble the reset vector code ; -; Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.
+; Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.
; This program and the accompanying materials ; are licensed and made available under the terms and conditions of the BSD License ; which accompanies this distribution. The full text of the license may be found at @@ -41,6 +41,7 @@ %ifdef ARCH_X64 %include "Ia32/Flat32ToFlat64.asm" +%include "Ia32/PageTables64.asm" %endif %include "Ia16/Real16ToFlat32.asm"