You also need a special bl1 for 2G
---
diff --git a/include/configs/s5p6818_nanopim3.h b/include/configs/s5p6818_nanopim3.h
index b101019..4689d93 100644
--- a/include/configs/s5p6818_nanopim3.h
+++ b/include/configs/s5p6818_nanopim3.h
@@ -53,7 +53,7 @@

 /* board_init_f */
 #define	CONFIG_SYS_SDRAM_BASE			0x40000000
-#define	CONFIG_SYS_SDRAM_SIZE			0x40000000
+#define	CONFIG_SYS_SDRAM_SIZE			0x80000000

 /* dram 1 bank num */
 #define CONFIG_NR_DRAM_BANKS			1