1 files changed, 43 insertions, 0 deletions
diff --git a/roms/edk2/StandaloneMmPkg/Library/StandaloneMmMemLib/AArch64/StandaloneMmMemLibInternal.c b/roms/edk2/StandaloneMmPkg/Library/StandaloneMmMemLib/AArch64/StandaloneMmMemLibInternal.c
new file mode 100644
index 000000000..cb7c5e677
--- /dev/null
+++ b/roms/edk2/StandaloneMmPkg/Library/StandaloneMmMemLib/AArch64/StandaloneMmMemLibInternal.c
@@ -0,0 +1,43 @@
+/** @file
+  Internal ARCH Specific file of MM memory check library.
+
+  MM memory check library implementation. This library consumes MM_ACCESS_PROTOCOL
+  to get MMRAM information. In order to use this library instance, the platform should produce
+  all MMRAM range via MM_ACCESS_PROTOCOL, including the range for firmware (like MM Core
+  and MM driver) and/or specific dedicated hardware.
+
+  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+//
+// Maximum support address used to check input buffer
+//
+extern EFI_PHYSICAL_ADDRESS  mMmMemLibInternalMaximumSupportAddress;
+
+/**
+  Calculate and save the maximum support address.
+
+**/
+VOID
+MmMemLibInternalCalculateMaximumSupportAddress (
+  VOID
+  )
+{
+  UINT8        PhysicalAddressBits;
+
+  PhysicalAddressBits = 36;
+
+  //
+  // Save the maximum support address in one global variable
+  //
+  mMmMemLibInternalMaximumSupportAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, PhysicalAddressBits) - 1);
+  DEBUG ((DEBUG_INFO, "mMmMemLibInternalMaximumSupportAddress = 0x%lx\n", mMmMemLibInternalMaximumSupportAddress));
+}
+
+