| ;------------------------------------------------------------------------------ | |
| ; | |
| ; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
| ; SPDX-License-Identifier: BSD-2-Clause-Patent | |
| ; | |
| ; Module Name: | |
| ; | |
| ; DisableCache.Asm | |
| ; | |
| ; Abstract: | |
| ; | |
| ; Set the CD bit of CR0 to 1, clear the NW bit of CR0 to 0, and flush all caches with a | |
| ; WBINVD instruction. | |
| ; | |
| ; Notes: | |
| ; | |
| ;------------------------------------------------------------------------------ | |
| DEFAULT REL | |
| SECTION .text | |
| ;------------------------------------------------------------------------------ | |
| ; VOID | |
| ; EFIAPI | |
| ; AsmDisableCache ( | |
| ; VOID | |
| ; ); | |
| ;------------------------------------------------------------------------------ | |
| global ASM_PFX(AsmDisableCache) | |
| ASM_PFX(AsmDisableCache): | |
| mov rax, cr0 | |
| bts rax, 30 | |
| btr rax, 29 | |
| mov cr0, rax | |
| wbinvd | |
| ret | |