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| author | Olivier Martin <olivier.martin@arm.com> | 2013-09-02 09:02:16 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-09-02 09:02:16 +0000 |
| commit | 8c1e795168bf0b63252e7ad293324fe5e2c5abe3 (patch) | |
| tree | afa9b73530e8b9d49bca6b7d1658ff767edcdd1c /MdePkg/Library/BaseLib/AArch64 | |
| parent | bf1a8c06996a0d4d1a4893970bc55ccc3cd6f95b (diff) | |
| download | edk2-platforms-8c1e795168bf0b63252e7ad293324fe5e2c5abe3.tar.xz | |
Add Memory fence for ARM Architecture (32 and 64 bit)
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14615 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/AArch64')
| -rw-r--r-- | MdePkg/Library/BaseLib/AArch64/MemoryFence.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/AArch64/MemoryFence.S b/MdePkg/Library/BaseLib/AArch64/MemoryFence.S new file mode 100644 index 0000000000..5c69e08170 --- /dev/null +++ b/MdePkg/Library/BaseLib/AArch64/MemoryFence.S @@ -0,0 +1,39 @@ +##------------------------------------------------------------------------------
+#
+# MemoryFence() for AArch64
+#
+# Copyright (c) 2013, ARM 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(MemoryFence)
+
+
+#/**
+# Used to serialize load and store operations.
+#
+# All loads and stores that proceed calls to this function are guaranteed to be
+# globally visible when this function returns.
+#
+#**/
+#VOID
+#EFIAPI
+#MemoryFence (
+# VOID
+# );
+#
+ASM_PFX(MemoryFence):
+ // System wide Data Memory Barrier.
+ dmb sy
+ ret
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