Implement late binding for runtime hooks
At present SPD power management hooks and BL3-2 entry are implemented
using weak references. This would have the handlers bound and registered
with the core framework at build time, but leaves them dangling if a
service fails to initialize at runtime.
This patch replaces implementation by requiring runtime handlers to
register power management and deferred initialization hooks with the
core framework at runtime. The runtime services are to register the
hooks only as the last step, after having all states successfully
initialized.
Change-Id: Ibe788a2a381ef39aec1d4af5ba02376e67269782
diff --git a/services/psci/psci_common.c b/services/psci/psci_common.c
index cacd97e..236309c 100644
--- a/services/psci/psci_common.c
+++ b/services/psci/psci_common.c
@@ -41,10 +41,10 @@
#include "debug.h"
/*
- * Provide a null weak instantiation for SPD power management operations. An SPD
- * can define its own instance overriding this one
+ * SPD power management operations, expected to be supplied by the registered
+ * SPD on successful SP initialization
*/
-const spd_pm_ops __attribute__((weak)) spd_pm = {0};
+const spd_pm_ops *psci_spd_pm;
/*******************************************************************************
* Arrays that contains information needs to resume a cpu's execution when woken
@@ -556,3 +556,13 @@
end_afflvl,
mpidr_nodes);
}
+
+/*******************************************************************************
+ * This function initializes the set of hooks that PSCI invokes as part of power
+ * management operation. The power management hooks are expected to be provided
+ * by the SPD, after it finishes all its initialization
+ ******************************************************************************/
+void psci_register_spd_pm_hook(const spd_pm_ops *pm)
+{
+ psci_spd_pm = pm;
+}