diff --git a/include/lib/psci/psci_lib.h b/include/lib/psci/psci_lib.h
index 1ac45ad..d135a51 100644
--- a/include/lib/psci/psci_lib.h
+++ b/include/lib/psci/psci_lib.h
@@ -38,6 +38,17 @@
  */
 typedef void (*mailbox_entrypoint_t)(void);
 
+/*
+ * These are the states reported by the PSCI_AFFINITY_INFO API for the specified
+ * CPU. The definitions of these states can be found in Section 5.7.1 in the
+ * PSCI specification (ARM DEN 0022C).  Available for psci_lib clients.
+ */
+typedef enum {
+	AFF_STATE_ON = U(0),
+	AFF_STATE_OFF = U(1),
+	AFF_STATE_ON_PENDING = U(2)
+} aff_info_state_t;
+
 /******************************************************************************
  * Structure to pass PSCI Library arguments.
  *****************************************************************************/
@@ -91,6 +102,8 @@
 			  entry_point_info_t *next_image_info);
 int psci_stop_other_cores(unsigned int wait_ms,
 			  void (*stop_func)(u_register_t mpidr));
+unsigned int psci_is_last_on_core_safe(void);
+
 #endif /* __ASSEMBLER__ */
 
 #endif /* PSCI_LIB_H */