mirror of
https://git.proxmox.com/git/mirror_edk2
synced 2025-10-31 09:21:56 +00:00
a91d8309af
The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert X64/EnableCache.asm to X64/EnableCache.nasm Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
44 lines
1.3 KiB
NASM
44 lines
1.3 KiB
NASM
;------------------------------------------------------------------------------
|
|
;
|
|
; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
|
; This program and the accompanying materials
|
|
; are licensed and made available under the terms and conditions of the BSD License
|
|
; which accompanies this distribution. The full text of the license may be found at
|
|
; http://opensource.org/licenses/bsd-license.php.
|
|
;
|
|
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
;
|
|
; Module Name:
|
|
;
|
|
; EnableCache.Asm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; Flush all caches with a WBINVD instruction, clear the CD bit of CR0 to 0, and clear
|
|
; the NW bit of CR0 to 0
|
|
;
|
|
; Notes:
|
|
;
|
|
;------------------------------------------------------------------------------
|
|
|
|
DEFAULT REL
|
|
SECTION .text
|
|
|
|
;------------------------------------------------------------------------------
|
|
; VOID
|
|
; EFIAPI
|
|
; AsmEnableCache (
|
|
; VOID
|
|
; );
|
|
;------------------------------------------------------------------------------
|
|
global ASM_PFX(AsmEnableCache)
|
|
ASM_PFX(AsmEnableCache):
|
|
wbinvd
|
|
mov rax, cr0
|
|
btr rax, 29
|
|
btr rax, 30
|
|
mov cr0, rax
|
|
ret
|
|
|