projects / mirror_edk2.git / blame
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|---|---|---|
| da351bdb PB |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; MemoryFence() for AArch64\r | |
| 4 | ;\r | |
| 5 | ; Copyright (c) 2013, ARM Ltd. All rights reserved.\r | |
| 6 | ;\r | |
| 7 | ; This program and the accompanying materials\r | |
| 8 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
| 9 | ; which accompanies this distribution. The full text of the license may be found at\r | |
| 10 | ; http://opensource.org/licenses/bsd-license.php.\r | |
| 11 | ;\r | |
| 12 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 13 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | ;\r | |
| 15 | ;------------------------------------------------------------------------------\r | |
| 16 | \r | |
| 17 | EXPORT MemoryFence\r | |
| 18 | AREA BaseLib_LowLevel, CODE, READONLY\r | |
| 19 | \r | |
| 20 | ;/**\r | |
| 21 | ; Used to serialize load and store operations.\r | |
| 22 | ;\r | |
| 23 | ; All loads and stores that proceed calls to this function are guaranteed to be\r | |
| 24 | ; globally visible when this function returns.\r | |
| 25 | ;\r | |
| 26 | ;**/\r | |
| 27 | ;VOID\r | |
| 28 | ;EFIAPI\r | |
| 29 | ;MemoryFence (\r | |
| 30 | ; VOID\r | |
| 31 | ; );\r | |
| 32 | ;\r | |
| 33 | MemoryFence\r | |
| 34 | // System wide Data Memory Barrier.\r | |
| 35 | dmb sy\r | |
| 36 | ret\r | |
| 37 | \r | |
| 38 | END\r |