nxp: nv storage api on platforms
NV storage API(s) for NXP platforms, supported on:
- flexspi-nor
- SecMon - General Purpose Registers at Low-Power section,
retains their content if backed by coined battery.
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: Id65dee4f28e7d6d2024407030039de33ebe0fa05
diff --git a/plat/nxp/common/nv_storage/nv_storage.mk b/plat/nxp/common/nv_storage/nv_storage.mk
new file mode 100644
index 0000000..dddba5f
--- /dev/null
+++ b/plat/nxp/common/nv_storage/nv_storage.mk
@@ -0,0 +1,29 @@
+#
+# Copyright 2020 NXP
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+# NXP Non-Volatile data flag storage used and then cleared by SW on boot-up
+
+$(eval $(call add_define,NXP_NV_SW_MAINT_LAST_EXEC_DATA))
+
+ifeq ($(NXP_COINED_BB),yes)
+$(eval $(call add_define,NXP_COINED_BB))
+# BL2 : To read the reset cause from LP SECMON GPR register
+# BL31: To write the reset cause to LP SECMON GPR register
+$(eval $(call SET_NXP_MAKE_FLAG,SNVS_NEEDED,BL_COMM))
+
+# BL2: DDR training data is stored on Flexspi NOR.
+ifneq (${BOOT_MODE},flexspi_nor)
+$(eval $(call SET_NXP_MAKE_FLAG,XSPI_NEEDED,BL2))
+endif
+
+else
+$(eval $(call add_define_val,DEFAULT_NV_STORAGE_BASE_ADDR,'${BL2_BIN_XSPI_NOR_END_ADDRESS} - 2 * ${NXP_XSPI_NOR_UNIT_SIZE}'))
+$(eval $(call SET_NXP_MAKE_FLAG,XSPI_NEEDED,BL_COMM))
+endif
+
+NV_STORAGE_INCLUDES += -I${PLAT_COMMON_PATH}/nv_storage
+
+NV_STORAGE_SOURCES += ${PLAT_COMMON_PATH}/nv_storage/plat_nv_storage.c