stm32mp1: introduce shared resources support
STM32MP1 SoC includes peripheral interfaces that can be assigned to
the secure world, or that can be opened to the non-secure world.
This change introduces the basics of a driver that manages such
resources which assignation is done at run time. It currently offers
API functions that state whether a service exposed to non-secure
world has permission to access a targeted clock or reset controller.
Change-Id: Iff20028f41586bc501085488c03546ffe31046d8
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/plat/st/stm32mp1/stm32mp1_shared_resources.c b/plat/st/stm32mp1/stm32mp1_shared_resources.c
new file mode 100644
index 0000000..a686152
--- /dev/null
+++ b/plat/st/stm32mp1/stm32mp1_shared_resources.c
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2017-2020, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stm32mp_shared_resources.h>
+
+/* Currently allow full access by non-secure to platform clock services */
+bool stm32mp_nsec_can_access_clock(unsigned long clock_id)
+{
+ return true;
+}
+
+/* Currently allow full access by non-secure to platform reset services */
+bool stm32mp_nsec_can_access_reset(unsigned int reset_id)
+{
+ return true;
+}