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;------------------------------------------------------------------------------ 35global ASM_PFX(AsmDisableCache) 36ASM_PFX(AsmDisableCache): 37 mov rax, cr0 38 bts rax, 30 39 btr rax, 29 40 mov cr0, rax 41 wbinvd 42 ret 43 44