audk/MdePkg/Library/BaseLib/Ia32/WriteCr4.c

32 lines
734 B
C

/** @file
AsmWriteCr4 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
UINTN
EFIAPI
AsmWriteCr4 (
UINTN Value
)
{
_asm {
mov eax, Value
_emit 0x0f // mov cr4, eax
_emit 0x22
_emit 0xE0
}
}
#endif