#------------------------------------------------------------------------------ | |
# | |
# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
# 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. | |
# | |
# Module Name: | |
# | |
# DisableCache.S | |
# | |
# Abstract: | |
# | |
# Set the CD bit of CR0 to 1, clear the NW bit of CR0 to 0, and flush all caches with a | |
# WBINVD instruction. | |
# | |
# Notes: | |
# | |
#------------------------------------------------------------------------------ | |
#------------------------------------------------------------------------------ | |
# VOID | |
# EFIAPI | |
# AsmDisableCache ( | |
# VOID | |
# ); | |
#------------------------------------------------------------------------------ | |
ASM_GLOBAL ASM_PFX(AsmDisableCache) | |
ASM_PFX(AsmDisableCache): | |
movl %cr0, %eax | |
btsl $30, %eax | |
btrl $29, %eax | |
movl %eax, %cr0 | |
wbinvd | |
ret |