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# DisableCache.S 15# 16# Abstract: 17# 18# Set the CD bit of CR0 to 1, clear the NW bit of CR0 to 0, and flush all caches with a 19# WBINVD instruction. 20# 21# Notes: 22# 23#------------------------------------------------------------------------------ 24 25#------------------------------------------------------------------------------ 26# VOID 27# EFIAPI 28# AsmDisableCache ( 29# VOID 30# ); 31#------------------------------------------------------------------------------ 32ASM_GLOBAL ASM_PFX(AsmDisableCache) 33ASM_PFX(AsmDisableCache): 34 movl %cr0, %eax 35 btsl $30, %eax 36 btrl $29, %eax 37 movl %eax, %cr0 38 wbinvd 39 ret 40