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|
;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; 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
|
