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;------------------------------------------------------------------------------ 34global ASM_PFX(AsmDisableCache) 35ASM_PFX(AsmDisableCache): 36 mov eax, cr0 37 bts eax, 30 38 btr eax, 29 39 mov cr0, eax 40 wbinvd 41 ret 42 43