diff --git a/include/drivers/arm/arm_gicv3_common.h b/include/drivers/arm/arm_gicv3_common.h
index e5df311..d1e93be 100644
--- a/include/drivers/arm/arm_gicv3_common.h
+++ b/include/drivers/arm/arm_gicv3_common.h
@@ -21,4 +21,8 @@
 #define IIDR_MODEL_ARM_GIC_600AE	U(0x0300043b)
 #define IIDR_MODEL_ARM_GIC_700		U(0x0400043b)
 
+#define PIDR_COMPONENT_ARM_DIST		U(0x492)
+#define PIDR_COMPONENT_ARM_REDIST	U(0x493)
+#define PIDR_COMPONENT_ARM_ITS		U(0x494)
+
 #endif /* ARM_GICV3_COMMON_H */
diff --git a/include/drivers/arm/gicv3.h b/include/drivers/arm/gicv3.h
index fa8946b..973a58b 100644
--- a/include/drivers/arm/gicv3.h
+++ b/include/drivers/arm/gicv3.h
@@ -104,6 +104,8 @@
 #define GICD_IROUTER		U(0x6000)
 #define GICD_IROUTERE		U(0x8000)
 
+#define GICD_PIDR0_GICV3	U(0xffe0)
+#define GICD_PIDR1_GICV3	U(0xffe4)
 #define GICD_PIDR2_GICV3	U(0xffe8)
 
 #define IGRPMODR_SHIFT		5
@@ -324,6 +326,8 @@
 #endif
 }
 
+unsigned int gicv3_get_component_partnum(const uintptr_t gic_frame);
+
 static inline bool gicv3_is_intr_id_special_identifier(unsigned int id)
 {
 	return (id >= PENDING_G1S_INTID) && (id <= GIC_SPURIOUS_INTERRUPT);