mirror of https://github.com/acidanthera/audk.git
37 lines
859 B
C
37 lines
859 B
C
|
/** @file
|
||
|
|
AsmEnableCache function
|
||
|
|
|
||
|
|
Copyright (c) 2006 - 2008, 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.
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
/**
|
||
|
|
Enabled caches.
|
||
|
|
|
||
|
|
Flush all caches with a WBINVD instruction, clear the CD bit of CR0 to 0, and clear
|
||
|
|
the NW bit of CR0 to 0
|
||
|
|
|
||
|
|
**/
|
||
|
|
VOID
|
||
|
|
EFIAPI
|
||
|
|
AsmEnableCache (
|
||
|
|
VOID
|
||
|
|
)
|
||
|
|
{
|
||
|
|
_asm {
|
||
|
|
wbinvd
|
||
|
|
mov eax, cr0
|
||
|
|
btr eax, 30
|
||
|
|
btr eax, 29
|
||
|
|
mov cr0, eax
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|