diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index 0fb4e74..29da33c 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -297,6 +297,10 @@
 #define ID_AA64MMFR2_EL1_ST_SHIFT	U(28)
 #define ID_AA64MMFR2_EL1_ST_MASK	ULL(0xf)
 
+#define ID_AA64MMFR2_EL1_CCIDX_SHIFT	U(20)
+#define ID_AA64MMFR2_EL1_CCIDX_MASK	ULL(0xf)
+#define ID_AA64MMFR2_EL1_CCIDX_LENGTH	U(4)
+
 #define ID_AA64MMFR2_EL1_CNP_SHIFT	U(0)
 #define ID_AA64MMFR2_EL1_CNP_MASK	ULL(0xf)