mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-18 15:27:48 +01:00
37 lines
893 B
NASM
37 lines
893 B
NASM
|
;------------------------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; 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:
|
||
|
|
;
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
SECTION .text
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; VOID
|
||
|
|
; EFIAPI
|
||
|
|
; AsmDisableCache (
|
||
|
|
; VOID
|
||
|
|
; );
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
global ASM_PFX(AsmDisableCache)
|
||
|
|
ASM_PFX(AsmDisableCache):
|
||
|
|
mov eax, cr0
|
||
|
|
bts eax, 30
|
||
|
|
btr eax, 29
|
||
|
|
mov cr0, eax
|
||
|
|
wbinvd
|
||
|
|
ret
|
||
|
|
|