881813d7a9
Use CPUID Leaf 01 to detect support for CLFLUSH instruction. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Michael Kinney <michael.d.kinney@intel.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17212 6f19259b-4bc3-4df7-8a09-765794883524
54 lines
1.4 KiB
NASM
54 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:
|
|
;
|
|
;------------------------------------------------------------------------------
|
|
|
|
.586P
|
|
.model flat,C
|
|
.xmm
|
|
.code
|
|
|
|
;------------------------------------------------------------------------------
|
|
; VOID *
|
|
; EFIAPI
|
|
; AsmFlushCacheLine (
|
|
; IN VOID *LinearAddress
|
|
; );
|
|
;------------------------------------------------------------------------------
|
|
AsmFlushCacheLine PROC
|
|
;
|
|
; If the CPU does not support CLFLUSH instruction,
|
|
; then promote flush range to flush entire cache.
|
|
;
|
|
mov eax, 1
|
|
cpuid
|
|
mov eax, [esp + 4]
|
|
test edx, BIT19
|
|
jz @F
|
|
clflush [eax]
|
|
ret
|
|
@@:
|
|
wbinvd
|
|
ret
|
|
AsmFlushCacheLine ENDP
|
|
|
|
END
|