CSS: Implement support for NODE_HW_STATE
This patch implements CSS platform hook to support NODE_HW_STATE PSCI
API. The platform hook queries SCP to obtain CSS power state. Power
states returned by SCP are then converted to expected PSCI return codes.
Juno's PSCI operation structure is modified to use the CSS
implementation.
Change-Id: I4a5edac0e5895dd77b51398cbd78f934831dafc0
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__ */