diff options
| author | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-07-02 09:34:25 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-07-02 09:34:25 +0000 |
| commit | f1baef624fb7119c54c3389a2cd99b108ee08f0e (patch) | |
| tree | d713f9ecb9bcb40f62ace27aa135db8c4b0e86e0 /MdePkg/Library/BaseLib/X64/EnablePaging64.asm | |
| parent | 29b052646a5f5fa0b28cbe9ca6224541e688f251 (diff) | |
| download | edk2-platforms-f1baef624fb7119c54c3389a2cd99b108ee08f0e.tar.xz | |
1. Port X64, IPF and EBC arch for BaseLib
2. Port X64 arch codes for BaseMemoryLibRepStr and BaseMemoryLibSee2
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2955 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/X64/EnablePaging64.asm')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/EnablePaging64.asm | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/X64/EnablePaging64.asm b/MdePkg/Library/BaseLib/X64/EnablePaging64.asm new file mode 100644 index 0000000000..c54843008a --- /dev/null +++ b/MdePkg/Library/BaseLib/X64/EnablePaging64.asm @@ -0,0 +1,64 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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.
+;
+; Module Name:
+;
+; EnablePaging64.Asm
+;
+; Abstract:
+;
+; AsmEnablePaging64 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ .code
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; InternalX86EnablePaging64 (
+; IN UINT16 Cs,
+; IN UINT64 EntryPoint,
+; IN UINT64 Context1, OPTIONAL
+; IN UINT64 Context2, OPTIONAL
+; IN UINT64 NewStack
+; );
+;------------------------------------------------------------------------------
+InternalX86EnablePaging64 PROC
+ cli
+ pop rax ; skip the return address
+ call @Base
+@Base:
+ add dword ptr [rsp], @F - @Base ; offset for far retf, seg is the 1st arg
+ mov rax, cr4 ; mov eax, cr4
+ or al, (1 SHL 5)
+ mov cr4, rax ; enable PAE
+ mov ecx, 0c0000080h
+ rdmsr
+ or ah, 1 ; set LME
+ wrmsr
+ mov rax, cr0 ; mov eax, cr0
+ bts eax, 31
+ mov cr0, rax ; enable paging
+ retf
+@@: ; long mode starts here
+ mov rbx, [esp]
+ mov rcx, [esp + 8]
+ mov rdx, [esp + 10h]
+ mov rsp, [esp + 18h]
+ add rsp, -20h
+ call rbx
+ hlt ; halt processor if EntryPoint() returned
+InternalX86EnablePaging64 ENDP
+
+ END
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