1#------------------------------------------------------------------------------
2#
3# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
4# This program and the accompanying materials
5# are licensed and made available under the terms and conditions of the BSD License
6# which accompanies this distribution.  The full text of the license may be found at
7# http://opensource.org/licenses/bsd-license.php.
8#
9# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
11#
12# Module Name:
13#
14#   EnableCache.S
15#
16# Abstract:
17#
18#   Flush all caches with a WBINVD instruction, clear the CD bit of CR0 to 0, and clear
19#   the NW bit of CR0 to 0
20#
21# Notes:
22#
23#------------------------------------------------------------------------------
24
25#------------------------------------------------------------------------------
26# VOID
27# EFIAPI
28# AsmEnableCache (
29#   VOID
30#   );
31#------------------------------------------------------------------------------
32ASM_GLOBAL ASM_PFX(AsmEnableCache)
33ASM_PFX(AsmEnableCache):
34    wbinvd
35    movl    %cr0, %eax
36    btrl    $30, %eax
37    btrl    $29, %eax
38    movl    %eax, %cr0
39    ret
40