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 movq %cr0, %rax 36 btrq $30, %rax 37 btrq $29, %rax 38 movq %rax, %cr0 39 ret 40