modules: trusted-firmware-m: initialize the TF-M NS interface

The TF-M NS interface needs to be initialized before it is used. We add an initialization function that calls tfm_ns_interface_init(), at boot time, so then we can use TF-M interface calls (veneers). Signed-off-by: Ioannis Glaropoulos <[email protected]>
jmyllyla · Mar 26, 2021 · e6965b3 · e6965b3
1 parent 261a659
commit e6965b3
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diff --git a/modules/trusted-firmware-m/CMakeLists.txt b/modules/trusted-firmware-m/CMakeLists.txt
@@ -205,6 +205,7 @@ function(trusted_firmware_build)
   add_dependencies(tfm_api tfm)
 endfunction()
 
+zephyr_library_sources_ifdef(CONFIG_BUILD_WITH_TFM  interface/interface.c)
 # Non-Secure interface to request system reboot
 zephyr_library_sources_ifdef(CONFIG_TFM_PARTITION_PLATFORM  src/reboot.c)
 

diff --git a/modules/trusted-firmware-m/interface/interface.c b/modules/trusted-firmware-m/interface/interface.c
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <device.h>
+#include <init.h>
+#include <kernel.h>
+
+#include <tfm_ns_interface.h>
+
+#if defined(TFM_PSA_API)
+#include "psa_manifest/sid.h"
+#endif /* TFM_PSA_API */
+
+static int ns_interface_init(const struct device *arg)
+{
+	ARG_UNUSED(arg);
+
+	(void)tfm_ns_interface_init();
+
+	return 0;
+}
+
+/* Initialize the TFM NS interface */
+SYS_INIT(ns_interface_init, POST_KERNEL,
+	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);