1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
4; This program and the accompanying materials
5; are licensed and made available under the terms and conditions of the BSD License
6; which accompanies this distribution.  The full text of the license may be found at
7; http://opensource.org/licenses/bsd-license.php.
8;
9; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
11;
12; Module Name:
13;
14;   FlushCacheLine.Asm
15;
16; Abstract:
17;
18;   AsmFlushCacheLine function
19;
20; Notes:
21;
22;------------------------------------------------------------------------------
23
24    SECTION .text
25
26;------------------------------------------------------------------------------
27; VOID *
28; EFIAPI
29; AsmFlushCacheLine (
30;   IN      VOID                      *LinearAddress
31;   );
32;------------------------------------------------------------------------------
33global ASM_PFX(AsmFlushCacheLine)
34ASM_PFX(AsmFlushCacheLine):
35    ;
36    ; If the CPU does not support CLFLUSH instruction,
37    ; then promote flush range to flush entire cache.
38    ;
39    mov     eax, 1
40    push    ebx
41    cpuid
42    pop     ebx
43    mov     eax, [esp + 4]
44    test    edx, BIT19
45    jz      .0
46    clflush [eax]
47    ret
48.0:
49    wbinvd
50    ret
51
52