+# ifdef CONFIG_ENV_IS_EMBEDDED
+# error "do not define CONFIG_ENV_IS_EMBEDDED in your board config"
+# error "it is calculated automatically for you"
+# endif
+#endif /* CONFIG_ENV_IS_IN_FLASH */
+
+#if defined(CONFIG_ENV_IS_IN_NAND)
+# ifndef CONFIG_ENV_OFFSET
+# error "Need to define CONFIG_ENV_OFFSET when using CONFIG_ENV_IS_IN_NAND"
+# endif
+# ifndef CONFIG_ENV_SIZE
+# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_NAND"
+# endif
+# ifdef CONFIG_ENV_OFFSET_REDUND
+# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
+# endif
+#endif /* CONFIG_ENV_IS_IN_NAND */