projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| c0959b44 AB |
1 | ##------------------------------------------------------------------------------\r |
| 2 | #\r | |
| 3 | # SpeculationBarrier() for AArch64\r | |
| 4 | #\r | |
| 5 | # Copyright (c) 2019, Linaro Ltd. All rights reserved.\r | |
| 6 | #\r | |
| 9344f092 | 7 | # SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| c0959b44 AB |
8 | #\r |
| 9 | ##------------------------------------------------------------------------------\r | |
| 10 | \r | |
| 11 | .text\r | |
| 12 | .p2align 2\r | |
| 13 | \r | |
| 14 | GCC_ASM_EXPORT(SpeculationBarrier)\r | |
| 15 | \r | |
| 16 | \r | |
| 17 | #/**\r | |
| 18 | # Uses as a barrier to stop speculative execution.\r | |
| 19 | #\r | |
| 20 | # Ensures that no later instruction will execute speculatively, until all prior\r | |
| 21 | # instructions have completed.\r | |
| 22 | #\r | |
| 23 | #**/\r | |
| 24 | #VOID\r | |
| 25 | #EFIAPI\r | |
| 26 | #SpeculationBarrier (\r | |
| 27 | # VOID\r | |
| 28 | # );\r | |
| 29 | #\r | |
| 30 | ASM_PFX(SpeculationBarrier):\r | |
| 31 | dsb sy\r | |
| 32 | isb\r | |
| 33 | ret\r |