Add power management support in the SPD
This patch implements a set of handlers in the SPD which are called by
the PSCI runtime service upon receiving a power management
operation. These handlers in turn pass control to the Secure Payload
image if required before returning control to PSCI. This ensures that
the Secure Payload has complete visibility of all power transitions in
the system and can prepare accordingly.
Change-Id: I2d1dba5629b7cf2d53999d39fe807dfcf3f62fe2
diff --git a/services/psci/psci_afflvl_off.c b/services/psci/psci_afflvl_off.c
index 72557aa..24c212f 100644
--- a/services/psci/psci_afflvl_off.c
+++ b/services/psci/psci_afflvl_off.c
@@ -56,9 +56,21 @@
psci_set_state(cpu_node, PSCI_STATE_OFF);
/*
- * Generic management: Get the index for clearing any
- * lingering re-entry information
+ * Generic management: Get the index for clearing any lingering re-entry
+ * information and allow the secure world to switch itself off
+ */
+
+ /*
+ * Call the cpu off handler registered by the Secure Payload Dispatcher
+ * to let it do any bookeeping. Assume that the SPD always reports an
+ * E_DENIED error if SP refuse to power down
*/
+ if (spd_pm.svc_off) {
+ rc = spd_pm.svc_off(0);
+ if (rc)
+ return rc;
+ }
+
index = cpu_node->data;
memset(&psci_ns_entry_info[index], 0, sizeof(psci_ns_entry_info[index]));