diff --git a/include/configs/SM850.h b/include/configs/SM850.h
index 7266f9a..56f03e2 100644
--- a/include/configs/SM850.h
+++ b/include/configs/SM850.h
@@ -372,4 +372,9 @@
 #define	BOOTFLAG_COLD	0x01		/* Normal Power-On: Boot from FLASH	*/
 #define BOOTFLAG_WARM	0x02		/* Software reboot			*/
 
+/* pass open firmware flat tree */
+#define CONFIG_OF_LIBFDT	1
+#define CONFIG_OF_BOARD_SETUP	1
+#define CONFIG_HWCONFIG		1
+
 #endif	/* __CONFIG_H */