Add TRNG Firmware Interface service
This adds the TRNG Firmware Interface Service to the standard
service dispatcher. This includes a method for dispatching entropy
requests to platforms and includes an entropy pool implementation to
avoid dropping any entropy requested from the platform.
Change-Id: I71cadb3cb377a507652eca9e0d68714c973026e9
Signed-off-by: Jimmy Brisson <jimmy.brisson@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/include/plat/common/plat_trng.h b/include/plat/common/plat_trng.h
new file mode 100644
index 0000000..a9f73b6
--- /dev/null
+++ b/include/plat/common/plat_trng.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2021, ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_TRNG_H
+#define PLAT_TRNG_H
+
+#include <tools_share/uuid.h>
+
+/* TRNG platform functions */
+
+extern uuid_t plat_trng_uuid;
+void plat_entropy_setup(void);
+bool plat_get_entropy(uint64_t *out);
+
+#endif /* PLAT_TRNG_H */