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9f4f2f0e | 1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
bb817c56 HT |
3 | ; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
4 | ; This program and the accompanying materials\r | |
9f4f2f0e | 5 | ; are licensed and made available under the terms and conditions of the BSD License\r |
6 | ; which accompanies this distribution. The full text of the license may be found at\r | |
7 | ; http://opensource.org/licenses/bsd-license.php\r | |
8 | ;\r | |
9 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | ;\r | |
12 | ; Module Name:\r | |
13 | ;\r | |
14 | ; DisableCache.Asm\r | |
15 | ;\r | |
16 | ; Abstract:\r | |
17 | ;\r | |
18 | ; Set the CD bit of CR0 to 1, clear the NW bit of CR0 to 0, and flush all caches with a\r | |
19 | ; WBINVD instruction.\r | |
20 | ;\r | |
21 | ; Notes:\r | |
22 | ;\r | |
23 | ;------------------------------------------------------------------------------\r | |
24 | \r | |
e73bf9f3 | 25 | .486p\r |
9f4f2f0e | 26 | .model flat,C\r |
27 | .code\r | |
28 | \r | |
29 | ;------------------------------------------------------------------------------\r | |
30 | ; VOID\r | |
31 | ; EFIAPI\r | |
32 | ; AsmDisableCache (\r | |
33 | ; VOID\r | |
34 | ; );\r | |
35 | ;------------------------------------------------------------------------------\r | |
36 | AsmDisableCache PROC\r | |
37 | mov eax, cr0\r | |
38 | bts eax, 30\r | |
39 | btr eax, 29\r | |
40 | mov cr0, eax\r | |
41 | wbinvd\r | |
42 | ret\r | |
43 | AsmDisableCache ENDP\r | |
44 | \r | |
45 | END\r |