1 files changed, 33 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Arm/SpeculationBarrier.asm b/MdePkg/Library/BaseLib/Arm/SpeculationBarrier.asm
new file mode 100644
index 000000000000..3b4d5c3f501d
--- /dev/null
+++ b/MdePkg/Library/BaseLib/Arm/SpeculationBarrier.asm
@@ -0,0 +1,33 @@
+;------------------------------------------------------------------------------
+;
+; SpeculationBarrier() for AArch64
+;
+; Copyright (c) 2019, Linaro Ltd. All rights reserved.
+;
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;------------------------------------------------------------------------------
+
+    EXPORT SpeculationBarrier
+
+    AREA MemoryBarriers, CODE, READONLY
+
+;/**
+;  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
+;  );
+;
+SpeculationBarrier
+    dsb
+    isb
+    bx    lr
+
+  END