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