+/**
+ * rkcommon_check_params() - check params
+ *
+ * @return 0 if OK, -1 if ERROR.
+ */
+int rkcommon_check_params(struct image_tool_params *params);
+
+/**
+ * rkcommon_get_spl_hdr() - get 4-bytes spl hdr for a Rockchip boot image
+ *
+ * Rockchip's bootrom requires the spl loader to start with a 4-bytes
+ * header. The content of this header depends on the chip type.
+ */
+const char *rkcommon_get_spl_hdr(struct image_tool_params *params);
+
+/**
+ * rkcommon_get_spl_size() - get spl size for a Rockchip boot image
+ *
+ * Different chip may have different sram size. And if we want to jump
+ * back to the bootrom after spl, we may need to reserve some sram space
+ * for the bootrom.
+ * The spl loader size should be sram size minus reserved size(if needed)
+ */
+int rkcommon_get_spl_size(struct image_tool_params *params);
+