diff --git a/include/plat/arm/css/common/css_def.h b/include/plat/arm/css/common/css_def.h
index 636daf2..173de1b 100644
--- a/include/plat/arm/css/common/css_def.h
+++ b/include/plat/arm/css/common/css_def.h
@@ -148,5 +148,15 @@
 /* Trusted mailbox base address common to all CSS */
 #define PLAT_ARM_TRUSTED_MAILBOX_BASE	ARM_TRUSTED_SRAM_BASE
 
+/*
+ * Parsing of CPU and Cluster states, as returned by 'Get CSS Power State' SCP
+ * command
+ */
+#define CSS_CLUSTER_PWR_STATE_ON	0
+#define CSS_CLUSTER_PWR_STATE_OFF	3
+
+#define CSS_CPU_PWR_STATE_ON		1
+#define CSS_CPU_PWR_STATE_OFF		0
+#define CSS_CPU_PWR_STATE(state, n)	(((state) >> (n)) & 1)
 
 #endif /* __CSS_DEF_H__ */
diff --git a/include/plat/arm/css/common/css_pm.h b/include/plat/arm/css/common/css_pm.h
index ea6a5d2..4a6ca81 100644
--- a/include/plat/arm/css/common/css_pm.h
+++ b/include/plat/arm/css/common/css_pm.h
@@ -45,5 +45,6 @@
 void __dead2 css_system_reset(void);
 void css_cpu_standby(plat_local_state_t cpu_state);
 void css_get_sys_suspend_power_state(psci_power_state_t *req_state);
+int css_node_hw_state(u_register_t mpidr, unsigned int power_level);
 
 #endif /* __CSS_PM_H__ */