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-rw-r--r--ArmPkg/Include/Library/ArmLib.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ArmPkg/Include/Library/ArmLib.h b/ArmPkg/Include/Library/ArmLib.h
index 3ce687244f..898b195d65 100644
--- a/ArmPkg/Include/Library/ArmLib.h
+++ b/ArmPkg/Include/Library/ArmLib.h
@@ -81,7 +81,7 @@ typedef enum {
#define IS_PRIMARY_CORE(MpId) (((MpId) & PcdGet32(PcdArmPrimaryCoreMask)) == PcdGet32(PcdArmPrimaryCore))
#define GET_CORE_ID(MpId) ((MpId) & 0x3)
-#define GET_CLUSTER_ID(MpId) (((MpId) >> 6) & 0x3C)
+#define GET_CLUSTER_ID(MpId) (((MpId) >> 8) & 0x3C)
// Get the position of the core for the Stack Offset (4 Core per Cluster)
// Position = (ClusterId * 4) + CoreId
#define GET_CORE_POS(MpId) ((((MpId) >> 6) & 0x3C) + ((MpId) & 0x3))