mirror of https://github.com/acidanthera/audk.git
52 lines
1.4 KiB
NASM
52 lines
1.4 KiB
NASM
|
;------------------------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; Copyright (c) 2006 - 2015, 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:
|
||
|
|
;
|
||
|
|
; FlushCacheLine.Asm
|
||
|
|
;
|
||
|
|
; Abstract:
|
||
|
|
;
|
||
|
|
; AsmFlushCacheLine function
|
||
|
|
;
|
||
|
|
; Notes:
|
||
|
|
;
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
SECTION .text
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; VOID *
|
||
|
|
; EFIAPI
|
||
|
|
; AsmFlushCacheLine (
|
||
|
|
; IN VOID *LinearAddress
|
||
|
|
; );
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
global ASM_PFX(AsmFlushCacheLine)
|
||
|
|
ASM_PFX(AsmFlushCacheLine):
|
||
|
|
;
|
||
|
|
; If the CPU does not support CLFLUSH instruction,
|
||
|
|
; then promote flush range to flush entire cache.
|
||
|
|
;
|
||
|
|
mov eax, 1
|
||
|
|
push ebx
|
||
|
|
cpuid
|
||
|
|
pop ebx
|
||
|
|
mov eax, [esp + 4]
|
||
|
|
test edx, BIT19
|
||
|
|
jz .0
|
||
|
|
clflush [eax]
|
||
|
|
ret
|
||
|
|
.0:
|
||
|
|
wbinvd
|
||
|
|
ret
|
||
|
|
|