diff options
| author | Guo Mang <mang.guo@intel.com> | 2016-12-22 15:57:14 +0800 |
|---|---|---|
| committer | Guo Mang <mang.guo@intel.com> | 2016-12-26 19:14:41 +0800 |
| commit | 1760cf81e4b1847c6823ea3514a78dd120e19b6e (patch) | |
| tree | 64a874b14050fe24d3bbc1bc13cd293abf8ae018 /Core/MdePkg/Library/BaseLib/Ia32/EnablePaging64.asm | |
| parent | 7f05fa00f73038b425002566d3afe6c3ade2ccdb (diff) | |
| download | edk2-platforms-1760cf81e4b1847c6823ea3514a78dd120e19b6e.tar.xz | |
MdePkg: Move to new location
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>
Diffstat (limited to 'Core/MdePkg/Library/BaseLib/Ia32/EnablePaging64.asm')
| -rw-r--r-- | Core/MdePkg/Library/BaseLib/Ia32/EnablePaging64.asm | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/Ia32/EnablePaging64.asm b/Core/MdePkg/Library/BaseLib/Ia32/EnablePaging64.asm new file mode 100644 index 0000000000..5cc1d6baf2 --- /dev/null +++ b/Core/MdePkg/Library/BaseLib/Ia32/EnablePaging64.asm @@ -0,0 +1,68 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; 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.
+;
+; Module Name:
+;
+; EnablePaging64.Asm
+;
+; Abstract:
+;
+; AsmEnablePaging64 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ .686p
+ .model flat,C
+ .code
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; InternalX86EnablePaging64 (
+; IN UINT16 Cs,
+; IN UINT64 EntryPoint,
+; IN UINT64 Context1, OPTIONAL
+; IN UINT64 Context2, OPTIONAL
+; IN UINT64 NewStack
+; );
+;------------------------------------------------------------------------------
+InternalX86EnablePaging64 PROC
+ cli
+ mov [esp], @F ; offset for far retf, seg is the 1st arg
+ mov eax, cr4
+ or al, (1 SHL 5)
+ mov cr4, eax ; enable PAE
+ mov ecx, 0c0000080h
+ rdmsr
+ or ah, 1 ; set LME
+ wrmsr
+ mov eax, cr0
+ bts eax, 31 ; set PG
+ mov cr0, eax ; enable paging
+ retf ; topmost 2 dwords hold the address
+@@: ; long mode starts here
+ DB 67h, 48h ; 32-bit address size, 64-bit operand size
+ mov ebx, [esp] ; mov rbx, [esp]
+ DB 67h, 48h
+ mov ecx, [esp + 8] ; mov rcx, [esp + 8]
+ DB 67h, 48h
+ mov edx, [esp + 10h] ; mov rdx, [esp + 10h]
+ DB 67h, 48h
+ mov esp, [esp + 18h] ; mov rsp, [esp + 18h]
+ DB 48h
+ add esp, -20h ; add rsp, -20h
+ call ebx ; call rbx
+ hlt ; no one should get here
+InternalX86EnablePaging64 ENDP
+
+ END
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