projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| c1d82295 JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
| 4 | ; This program and the accompanying materials\r | |
| 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 | |
| 25 | DEFAULT REL\r | |
| 26 | SECTION .text\r | |
| 27 | \r | |
| 28 | ;------------------------------------------------------------------------------\r | |
| 29 | ; VOID\r | |
| 30 | ; EFIAPI\r | |
| 31 | ; AsmDisableCache (\r | |
| 32 | ; VOID\r | |
| 33 | ; );\r | |
| 34 | ;------------------------------------------------------------------------------\r | |
| 35 | global ASM_PFX(AsmDisableCache)\r | |
| 36 | ASM_PFX(AsmDisableCache):\r | |
| 37 | mov rax, cr0\r | |
| 38 | bts rax, 30\r | |
| 39 | btr rax, 29\r | |
| 40 | mov cr0, rax\r | |
| 41 | wbinvd\r | |
| 42 | ret\r | |
| 43 | \r |