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/plat_nv_storage.h b/plat/nxp/common/nv_storage/plat_nv_storage.h
new file mode 100644
index 0000000..1f5264a
--- /dev/null
+++ b/plat/nxp/common/nv_storage/plat_nv_storage.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef PLAT_NV_STRG_H
+#define PLAT_NV_STRG_H
+
+#define DEFAULT_SET_VALUE 0xA1
+#define READY_TO_WRITE_VALUE 0xFF
+
+#ifndef NV_STORAGE_BASE_ADDR
+#define NV_STORAGE_BASE_ADDR DEFAULT_NV_STORAGE_BASE_ADDR
+#endif
+
+typedef struct {
+uint8_t warm_rst_flag;
+uint8_t wdt_rst_flag;
+uint8_t dummy[2];
+} nv_app_data_t;
+
+
+/*below enum and above structure should be in-sync. */
+enum app_data_offset {
+ WARM_RESET_FLAG_OFFSET,
+ WDT_RESET_FLAG_OFFSET,
+ APP_DATA_MAX_OFFSET,
+};
+
+int read_nv_app_data(void);
+
+int wr_nv_app_data(int data_offset,
+ uint8_t *data,
+ int data_size);
+
+const nv_app_data_t *get_nv_data(void);
+
+#endif /* PLAT_NV_STRG_H */