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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 | EXPORT SpeculationBarrier\r | |
12 | \r | |
13 | AREA MemoryBarriers, CODE, READONLY\r | |
14 | \r | |
15 | ;/**\r | |
16 | ; Uses as a barrier to stop speculative execution.\r | |
17 | ;\r | |
18 | ; Ensures that no later instruction will execute speculatively, until all prior\r | |
19 | ; instructions have completed.\r | |
20 | ;\r | |
21 | ;**/\r | |
22 | ;VOID\r | |
23 | ;EFIAPI\r | |
24 | ;SpeculationBarrier (\r | |
25 | ; VOID\r | |
26 | ; );\r | |
27 | ;\r | |
28 | SpeculationBarrier\r | |
29 | dsb\r | |
30 | isb\r | |
31 | bx lr\r | |
32 | \r | |
33 | END\r |