audk/MdePkg/Library/BaseLib/Ia32/EnablePaging32.c

50 lines
1.2 KiB
C

/** @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