Refactor Statistical Profiling Extensions implementation
Factor out SPE operations in a separate file. Use the publish
subscribe framework to drain the SPE buffers before entering secure
world. Additionally, enable SPE before entering normal world.
A side effect of this change is that the profiling buffers are now
only drained when a transition from normal world to secure world
happens. Previously they were drained also on return from secure
world, which is unnecessary as SPE is not supported in S-EL1.
Change-Id: I17582c689b4b525770dbb6db098b3a0b5777b70a
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
diff --git a/include/lib/extensions/spe.h b/include/lib/extensions/spe.h
new file mode 100644
index 0000000..8a74127
--- /dev/null
+++ b/include/lib/extensions/spe.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __SPE_H__
+#define __SPE_H__
+
+void spe_enable(int el2_unused);
+void spe_disable(void);
+
+#endif /* __SPE_H__ */