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.Asm 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 DEFAULT REL 26 SECTION .text 27 28 ;------------------------------------------------------------------------------ 29 ; VOID 30 ; EFIAPI 31 ; AsmDisableCache ( 32 ; VOID 33 ; ); 34 ;------------------------------------------------------------------------------ 35 global ASM_PFX(AsmDisableCache) 36 ASM_PFX(AsmDisableCache): 37 mov rax, cr0 38 bts rax, 30 39 btr rax, 29 40 mov cr0, rax 41 wbinvd 42 ret 43 44
