diff options
| author | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-09-19 19:04:40 +0000 |
|---|---|---|
| committer | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-09-19 19:04:40 +0000 |
| commit | 23086ba84cbb13350a2464b857b197eef67f1361 (patch) | |
| tree | 4b84f42f6ed01e4db5f0dfc34440b06d348137ad /MdePkg/Library/BaseLib/Ia32/EnablePaging32.c | |
| parent | b0537818290619c85993136877afae37492fe5e0 (diff) | |
| download | edk2-platforms-23086ba84cbb13350a2464b857b197eef67f1361.tar.xz | |
Optimize the size of the Base Library for the MSFT 32-bit tool chains by taking advantage of inline assembly.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1567 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/EnablePaging32.c')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/EnablePaging32.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/EnablePaging32.c b/MdePkg/Library/BaseLib/Ia32/EnablePaging32.c new file mode 100644 index 0000000000..146089cab6 --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/EnablePaging32.c @@ -0,0 +1,49 @@ +/** @file
+ AsmEnablePaging32 function
+
+ Copyright (c) 2006, Intel Corporation<BR>
+ 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.
+
+**/
+
+#if _MSC_EXTENSIONS
+
+__declspec (naked)
+VOID
+EFIAPI
+InternalX86EnablePaging32 (
+ IN SWITCH_STACK_ENTRY_POINT EntryPoint,
+ IN VOID *Context1, OPTIONAL
+ IN VOID *Context2, OPTIONAL
+ IN VOID *NewStack
+ )
+{
+ _asm {
+ push ebp
+ mov ebp, esp
+ mov ebx, EntryPoint
+ mov ecx, Context1
+ mov edx, Context2
+ pushfd
+ pop edi
+ cli
+ mov eax, cr0
+ bts eax, 31
+ mov esp, NewStack
+ mov cr0, eax
+ push edi
+ popfd
+ push edx
+ push ecx
+ call ebx
+ jmp $
+ }
+}
+
+#endif
|