diff --git a/board/renesas/common/common.c b/board/renesas/common/common.c
new file mode 100644
index 0000000..7fba8d1
--- /dev/null
+++ b/board/renesas/common/common.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * board/renesas/common/common.c
+ *
+ * Copyright (C) 2013 Renesas Electronics Corporation
+ * Copyright (C) 2013 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ * Copyright (C) 2015 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ */
+
+#include <dm.h>
+#include <fdt_support.h>
+#include <hang.h>
+#include <init.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <dm/uclass-internal.h>
+#include <asm/arch/renesas.h>
+#include <asm/system.h>
+#include <linux/libfdt.h>
+
+#ifdef CONFIG_RCAR_64
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	int ret = fdtdec_setup_mem_size_base();
+
+	if (current_el() == 3 && gd->ram_base == 0x48000000) {
+		/*
+		 * If this U-Boot runs in EL3, make the bottom 128 MiB
+		 * available for loading of follow up firmware blobs.
+		 */
+		gd->ram_base -= 0x8000000;
+		gd->ram_size += 0x8000000;
+	}
+
+	return ret;
+}
+
+int dram_init_banksize(void)
+{
+	int bank;
+
+	fdtdec_setup_memory_banksize();
+
+	if (current_el() != 3)
+		return 0;
+
+	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
+		if (gd->bd->bi_dram[bank].start != 0x48000000)
+			continue;
+
+		/*
+		 * If this U-Boot runs in EL3, make the bottom 128 MiB
+		 * available for loading of follow up firmware blobs.
+		 */
+		gd->bd->bi_dram[bank].start -= 0x8000000;
+		gd->bd->bi_dram[bank].size += 0x8000000;
+		break;
+	}
+
+	return 0;
+}
+
+int __weak board_init(void)
+{
+	return 0;
+}
+
+#endif