arm: rmobile: lager: Add external RAM boot

If CONFIG_RMOBILE_EXTRAM_BOOT is enabled, U-Boot is booted from External RAM.
The default boot address is 0xB0000000.

Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/include/configs/lager.h b/include/configs/lager.h
index 699135f..a814b4c 100644
--- a/include/configs/lager.h
+++ b/include/configs/lager.h
@@ -39,7 +39,11 @@
 #define CONFIG_FAT_WRITE
 #define CONFIG_EXT4_WRITE
 
+#if defined(CONFIG_RMOBILE_EXTRAM_BOOT)
+#define CONFIG_SYS_TEXT_BASE	0xB0000000
+#else
 #define CONFIG_SYS_TEXT_BASE	0xE8080000
+#endif
 #define CONFIG_SYS_THUMB_BUILD
 #define CONFIG_SYS_GENERIC_BOARD
 
@@ -70,8 +74,12 @@
 #define CONFIG_TMU_TIMER
 
 /* STACK */
-#define CONFIG_SYS_INIT_SP_ADDR		0xE827fffc
-#define STACK_AREA_SIZE				0xC000
+#if defined(CONFIGF_RMOBILE_EXTRAM_BOOT)
+#define CONFIG_SYS_INIT_SP_ADDR		0xB003FFFC
+#else
+#define CONFIG_SYS_INIT_SP_ADDR		0xE827FFFC
+#endif
+#define STACK_AREA_SIZE			0xC000
 #define LOW_LEVEL_MERAM_STACK	\
 		(CONFIG_SYS_INIT_SP_ADDR + STACK_AREA_SIZE - 4)