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-rw-r--r--MdePkg/Include/X64/ProcessorBind.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/MdePkg/Include/X64/ProcessorBind.h b/MdePkg/Include/X64/ProcessorBind.h
index e425428587..1c04090c7d 100644
--- a/MdePkg/Include/X64/ProcessorBind.h
+++ b/MdePkg/Include/X64/ProcessorBind.h
@@ -261,6 +261,11 @@ typedef INT64 INTN;
#define MAX_ADDRESS 0xFFFFFFFFFFFFFFFFULL
///
+/// Maximum usable address at boot time
+///
+#define MAX_ALLOC_ADDRESS MAX_ADDRESS
+
+///
/// Maximum legal x64 INTN and UINTN values.
///
#define MAX_INTN ((INTN)0x7FFFFFFFFFFFFFFFULL)