arm: rmobile: alt: Add external RAM boot

If CONFIG_RMOBILE_EXTRAM_BOOT is enabled, U-Boot is booted from External RAM.
The default boot address is 0x70000000.
Signed-off-by: NHisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: NNobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/arm/cpu/armv7/rmobile/Kconfig

@@ -25,7 +25,7 @@ config SYS_SOC
 
 config RMOBILE_EXTRAM_BOOT
 	bool "Enable boot from RAM"
-	depends on TARGET_LAGER || TARGET_KOELSCH
+	depends on TARGET_ALT || TARGET_KOELSCH || TARGET_LAGER
 	default n
 
 source "board/atmark-techno/armadillo-800eva/Kconfig"

board/renesas/alt/qos.c

@@ -13,6 +13,7 @@
 #include <asm/io.h>
 #include <asm/arch/rmobile.h>
 
+#if defined(CONFIG_RMOBILE_EXTRAM_BOOT)
 /* QoS version 0.11 */
 
 enum {
@@ -942,3 +943,8 @@ void qos_init(void)
 	writel(0x00000001, &axi_qos->qosthres2);
 	writel(0x00000001, &axi_qos->qosqon);
 }
+#else /* CONFIG_RMOBILE_EXTRAM_BOOT */
+void qos_init(void)
+{
+}
+#endif /* CONFIG_RMOBILE_EXTRAM_BOOT */

include/configs/alt.h

@@ -34,7 +34,11 @@
 #define CONFIG_CMD_SF
 #define CONFIG_CMD_SPI
 
+#if defined(CONFIG_RMOBILE_EXTRAM_BOOT)
+#define CONFIG_SYS_TEXT_BASE	0x70000000
+#else
 #define CONFIG_SYS_TEXT_BASE	0xE6304000
+#endif
 #define CONFIG_SYS_THUMB_BUILD
 #define CONFIG_SYS_GENERIC_BOARD
 
@@ -59,7 +63,11 @@
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_TMU_TIMER
 
+#if defined(CONFIG_RMOBILE_EXTRAM_BOOT)
+#define CONFIG_SYS_INIT_SP_ADDR		0x7003FFFC
+#else
 #define CONFIG_SYS_INIT_SP_ADDR		0xE633FFFC
+#endif
 #define STACK_AREA_SIZE			0xC000
 #define LOW_LEVEL_MERAM_STACK \
 		(CONFIG_SYS_INIT_SP_ADDR + STACK_AREA_SIZE - 4)