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| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdePkg/Library/BaseLib/AArch64/SpeculationBarrier.S | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/BaseLib/AArch64/SpeculationBarrier.S')
| -rw-r--r-- | roms/edk2/MdePkg/Library/BaseLib/AArch64/SpeculationBarrier.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/AArch64/SpeculationBarrier.S b/roms/edk2/MdePkg/Library/BaseLib/AArch64/SpeculationBarrier.S new file mode 100644 index 000000000..a20d6aed0 --- /dev/null +++ b/roms/edk2/MdePkg/Library/BaseLib/AArch64/SpeculationBarrier.S @@ -0,0 +1,33 @@ +##------------------------------------------------------------------------------
+#
+# 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 sy
+ isb
+ ret
|