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-rw-r--r--MdeModulePkg/Core/Dxe/Mem/Imem.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/MdeModulePkg/Core/Dxe/Mem/Imem.h b/MdeModulePkg/Core/Dxe/Mem/Imem.h
index d09ff3c522..16077d825d 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Imem.h
+++ b/MdeModulePkg/Core/Dxe/Mem/Imem.h
@@ -22,6 +22,15 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT (EFI_PAGE_SIZE * 2)
#define DEFAULT_PAGE_ALLOCATION (EFI_PAGE_SIZE * 2)
+#elif defined (MDE_CPU_AARCH64)
+///
+/// 64-bit ARM systems allow the OS to execute with 64 KB page size,
+/// so for improved interoperability with the firmware, align the
+/// runtime regions to 64 KB as well
+///
+#define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT (SIZE_64KB)
+#define DEFAULT_PAGE_ALLOCATION (EFI_PAGE_SIZE)
+
#else
///
/// For genric EFI machines make the default allocations 4K aligned