AMU: Implement support for aarch64
The `ENABLE_AMU` build option can be used to enable the
architecturally defined AMU counters. At present, there is no support
for the auxiliary counter group.
Change-Id: I7ea0c0a00327f463199d1b0a481f01dadb09d312
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
diff --git a/include/lib/extensions/amu.h b/include/lib/extensions/amu.h
new file mode 100644
index 0000000..bbefe8f
--- /dev/null
+++ b/include/lib/extensions/amu.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __AMU_H__
+#define __AMU_H__
+
+/* Enable all group 0 counters */
+#define AMU_GROUP0_COUNTERS_MASK 0xf
+
+void amu_enable(int el2_unused);
+
+#endif /* __AMU_H__ */