mirror of https://github.com/acidanthera/audk.git
40 lines
1.0 KiB
ArmAsm
40 lines
1.0 KiB
ArmAsm
|
##------------------------------------------------------------------------------
|
||
|
|
#
|
||
|
|
# SpeculationBarrier() for AArch64
|
||
|
|
#
|
||
|
|
# Copyright (c) 2019, Linaro Ltd. All rights reserved.
|
||
|
|
#
|
||
|
|
# This program and the accompanying materials
|
||
|
|
# are licensed and made available under the terms and conditions of the BSD License
|
||
|
|
# which accompanies this distribution. The full text of the license may be found at
|
||
|
|
# http://opensource.org/licenses/bsd-license.php.
|
||
|
|
#
|
||
|
|
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||
|
|
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||
|
|
#
|
||
|
|
##------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
.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 sy
|
||
|
|
isb
|
||
|
|
ret
|