diff options
| author | bbahnsen <bbahnsen@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-04-24 22:17:39 +0000 |
|---|---|---|
| committer | bbahnsen <bbahnsen@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-04-24 22:17:39 +0000 |
| commit | 185d764218d07c06838d4758125a5ca66178e7c9 (patch) | |
| tree | 6e628a1b60b10166b39d40bb7547c90cc1c32128 /MdePkg/Library/BaseLib/X64/DisablePaging64.asm | |
| parent | dd9f96de98c61f89d865600ce99cfd026711b02c (diff) | |
| download | edk2-platforms-185d764218d07c06838d4758125a5ca66178e7c9.tar.xz | |
Rename dirs
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@16 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/X64/DisablePaging64.asm')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/DisablePaging64.asm | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/X64/DisablePaging64.asm b/MdePkg/Library/BaseLib/X64/DisablePaging64.asm new file mode 100644 index 0000000000..3134e42571 --- /dev/null +++ b/MdePkg/Library/BaseLib/X64/DisablePaging64.asm @@ -0,0 +1,54 @@ +;------------------------------------------------------------------------------
+;
+; 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:
+;
+; DisablePaging64.Asm
+;
+; Abstract:
+;
+; AsmDisablePaging64 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ .code
+
+InternalX86DisablePaging64 PROC
+ cli
+ shl rcx, 32
+ lea ecx, @F
+ push rcx
+ mov ebx, edx
+ mov esi, r8d
+ mov edi, r9d
+ mov eax, [rsp + 28h]
+ retf
+@@:
+ mov esp, eax ; set up new stack
+ mov rax, cr0
+ btr eax, 31
+ mov cr0, rax ; disable paging
+ mov ecx, 0c0000080h
+ rdmsr
+ and ah, NOT 1 ; clear LME
+ wrmsr
+ mov rax, cr4
+ and al, NOT (1 SHL 5) ; clear PAE
+ mov cr4, rax
+ push rdi
+ push rsi
+ call rbx
+ jmp $
+InternalX86DisablePaging64 ENDP
+
+ END
|