diff --git a/drivers/renesas/rcar/rom/rom_api.c b/drivers/renesas/rcar/rom/rom_api.c
new file mode 100644
index 0000000..c14de55
--- /dev/null
+++ b/drivers/renesas/rcar/rom/rom_api.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <mmio.h>
+#include <stdint.h>
+#include "rcar_def.h"
+#include "rom_api.h"
+
+typedef uint32_t(*rom_secure_boot_api_f) (uint32_t *key, uint32_t *cert,
+					  rom_read_flash_f pFuncReadFlash);
+
+typedef uint32_t(*rom_get_lcs_api_f) (uint32_t *lcs);
+
+#define OLD_API_TABLE1	(0U)	/* H3 Ver.1.0/Ver.1.1 */
+#define OLD_API_TABLE2	(1U)	/* H3 Ver.2.0 */
+#define OLD_API_TABLE3	(2U)	/* M3 Ver.1.0 */
+#define NEW_API_TABLE	(3U)	/* H3 Ver.3.0, M3 Ver.1.1 or later, M3N, E3 */
+#define API_TABLE_MAX	(4U)	/* table max */
+				/* Later than H3 Ver.2.0 */
+
+static uint32_t get_table_index(void)
+{
+	uint32_t product;
+	uint32_t cut_ver;
+	uint32_t index;
+
+	product = mmio_read_32(RCAR_PRR) & RCAR_PRODUCT_MASK;
+	cut_ver = mmio_read_32(RCAR_PRR) & RCAR_CUT_MASK;
+
+	switch (product) {
+	case RCAR_PRODUCT_H3:
+		if (cut_ver == RCAR_CUT_VER10)
+			index = OLD_API_TABLE1;
+		else if (cut_ver == RCAR_CUT_VER11)
+			index = OLD_API_TABLE1;
+		else if (cut_ver == RCAR_CUT_VER20)
+			index = OLD_API_TABLE2;
+		else
+			/* Later than H3 Ver.2.0 */
+			index = NEW_API_TABLE;
+		break;
+	case RCAR_PRODUCT_M3:
+		if (cut_ver == RCAR_CUT_VER10)
+			index = OLD_API_TABLE3;
+		else
+			/* M3 Ver.1.1 or later */
+			index = NEW_API_TABLE;
+		break;
+	default:
+		index = NEW_API_TABLE;
+		break;
+	}
+
+	return index;
+}
+
+uint32_t rcar_rom_secure_boot_api(uint32_t *key, uint32_t *cert,
+			     rom_read_flash_f read_flash)
+{
+	static const uintptr_t rom_api_table[API_TABLE_MAX] = {
+		0xEB10DD64U,	/* H3 Ver.1.0/Ver.1.1 */
+		0xEB116ED4U,	/* H3 Ver.2.0 */
+		0xEB1102FCU,	/* M3 Ver.1.0 */
+		0xEB100180U	/* H3 Ver.3.0, M3 Ver.1.1 or later, M3N, E3 */
+	};
+	rom_secure_boot_api_f secure_boot;
+	uint32_t index;
+
+	index = get_table_index();
+	secure_boot = (rom_secure_boot_api_f) rom_api_table[index];
+
+	return secure_boot(key, cert, read_flash);
+}
+
+uint32_t rcar_rom_get_lcs(uint32_t *lcs)
+{
+	static const uintptr_t rom_get_lcs_table[API_TABLE_MAX] = {
+		0xEB10DFE0U,	/* H3 Ver.1.0/Ver.1.1 */
+		0xEB117150U,	/* H3 Ver.2.0 */
+		0xEB110578U,	/* M3 Ver.1.0 */
+		0xEB10018CU	/* H3 Ver.3.0, M3 Ver.1.1 or later, M3N, E3 */
+	};
+	rom_get_lcs_api_f get_lcs;
+	uint32_t index;
+
+	index = get_table_index();
+	get_lcs = (rom_get_lcs_api_f) rom_get_lcs_table[index];
+
+	return get_lcs(lcs);
+}