--- /dev/null
+/** @file\r
+ AsmDisablePaging32 function.\r
+\r
+ Copyright (c) 2006, Intel Corporation<BR>\r
+ All rights reserved. This program and the accompanying materials\r
+ are licensed and made available under the terms and conditions of the BSD License\r
+ which accompanies this distribution. The full text of the license may be found at\r
+ http://opensource.org/licenses/bsd-license.php\r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#if _MSC_EXTENSIONS\r
+\r
+__declspec (naked)\r
+VOID\r
+EFIAPI\r
+InternalX86DisablePaging32 (\r
+ IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r
+ IN VOID *Context1, OPTIONAL\r
+ IN VOID *Context2, OPTIONAL\r
+ IN VOID *NewStack\r
+ )\r
+{\r
+ _asm {\r
+ push ebp\r
+ mov ebp, esp\r
+ mov ebx, EntryPoint\r
+ mov ecx, Context1\r
+ mov edx, Context2\r
+ pushfd\r
+ pop edi // save EFLAGS to edi\r
+ cli\r
+ mov eax, cr0\r
+ btr eax, 31\r
+ mov esp, NewStack\r
+ mov cr0, eax\r
+ push edi\r
+ popfd // restore EFLAGS from edi\r
+ push edx\r
+ push ecx\r
+ call ebx\r
+ jmp $ // EntryPoint() should not return\r
+ }\r
+}\r
+\r
+#endif\r