aboutsummaryrefslogtreecommitdiffstats
path: root/MdePkg/Library/BaseLib/Arm/SpeculationBarrier.S
blob: a4742308d0eb6553d7c60b3efa521071062b8b33 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
##------------------------------------------------------------------------------
#
# SpeculationBarrier() for AArch64
#
# Copyright (c) 2019, Linaro Ltd. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
##------------------------------------------------------------------------------

.text
.p2align 2

GCC_ASM_EXPORT(SpeculationBarrier)


#/**
#  Uses as a barrier to stop speculative execution.
#
#  Ensures that no later instruction will execute speculatively, until all prior
#  instructions have completed.
#
#**/
#VOID
#EFIAPI
#SpeculationBarrier (
#  VOID
#  );
#
ASM_PFX(SpeculationBarrier):
    dsb
    isb
    bx   lr