plat: marvell: armada: a3k: support doing system reset via CM3 secure coprocessor
Introduce a new build option CM3_SYSTEM_RESET for A3700 platform, which,
when enabled, adds code to the PSCI reset handler to try to do system
reset by the WTMI firmware running on the Cortex-M3 secure coprocessor.
(This function is exposed via the mailbox interface.)
The reason is that the Turris MOX board has a HW bug which causes reset
to hang unpredictably. This issue can be solved by putting the board in
a specific state before reset.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Change-Id: I3f60b9f244f334adcd33d6db6a361fbc8b8d209f
diff --git a/plat/marvell/armada/a3k/common/a3700_common.mk b/plat/marvell/armada/a3k/common/a3700_common.mk
index e2022fa..712b162 100644
--- a/plat/marvell/armada/a3k/common/a3700_common.mk
+++ b/plat/marvell/armada/a3k/common/a3700_common.mk
@@ -1,5 +1,5 @@
#
-# Copyright (C) 2018 Marvell International Ltd.
+# Copyright (C) 2018-2020 Marvell International Ltd.
#
# SPDX-License-Identifier: BSD-3-Clause
# https://spdx.org/licenses
@@ -64,6 +64,10 @@
$(PLAT_COMMON_BASE)/a3700_sip_svc.c \
$(MARVELL_DRV)
+ifeq ($(CM3_SYSTEM_RESET),1)
+BL31_SOURCES += $(PLAT_COMMON_BASE)/cm3_system_reset.c
+endif
+
ifdef WTP
DOIMAGEPATH := $(WTP)