diff --git a/plat/rockchip/common/drivers/parameter/ddr_parameter.c b/plat/rockchip/common/drivers/parameter/ddr_parameter.c
new file mode 100644
index 0000000..c776f50
--- /dev/null
+++ b/plat/rockchip/common/drivers/parameter/ddr_parameter.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <arch_helpers.h>
+#include <console.h>
+#include <debug.h>
+#include <delay_timer.h>
+#include <mmio.h>
+#include <platform_def.h>
+#include <plat_private.h>
+#include <soc.h>
+#include <string.h>
+#include "ddr_parameter.h"
+
+/*
+ *  The miniloader delivers the parameters about ddr usage info from address
+ * 0x02000000 and the data format is defined as below figure. It tells ATF the
+ * areas of ddr that are used by platform, we treat them as non-secure regions
+ * by default. Then we should parse the other part regions and configurate them
+ * as secure regions to avoid illegal access.
+ *
+ *			[ddr usage info data format]
+ * 0x02000000
+ * -----------------------------------------------------------------------------
+ * |       <name>        |  <size>   |      <description>                      |
+ * -----------------------------------------------------------------------------
+ * | count               |  4byte    | the array numbers of the                |
+ * |                     |           | 'addr_array' and 'size_array'           |
+ * -----------------------------------------------------------------------------
+ * | reserved            |  4byte    | just for 'addr_array' 8byte aligned     |
+ * -----------------------------------------------------------------------------
+ * | addr_array[count]   | per 8byte | memory region base address              |
+ * -----------------------------------------------------------------------------
+ * | size_array[count]   | per 8byte | memory region size (byte)               |
+ * -----------------------------------------------------------------------------
+ */
+
+/*
+ * function: read parameters info(ns-regions) and try to parse s-regions info
+ *
+ * @addr: head address to the ddr usage struct from miniloader
+ * @max_mb: the max ddr capacity(MB) that the platform support
+ */
+struct param_ddr_usage ddr_region_usage_parse(uint64_t addr, uint64_t max_mb)
+{
+	uint64_t base, top;
+	uint32_t i, addr_offset, size_offset;
+	struct param_ddr_usage p;
+
+	memset(&p, 0, sizeof(p));
+
+	/* read how many blocks of ns-regions, read from offset: 0x0 */
+	p.ns_nr = mmio_read_32(addr + REGION_NR_OFFSET);
+	if ((p.ns_nr > DDR_REGION_NR_MAX) || (p.ns_nr == 0)) {
+		ERROR("over or zero region, nr=%d, max=%d\n",
+		      p.ns_nr, DDR_REGION_NR_MAX);
+		return p;
+	}
+
+	/* whole ddr regions boundary, it will be used when parse s-regions */
+	p.boundary = max_mb;
+
+	/* calculate ns-region base addr and size offset */
+	addr_offset = REGION_ADDR_OFFSET;
+	size_offset = REGION_ADDR_OFFSET + p.ns_nr * REGION_DATA_PER_BYTES;
+
+	/* read all ns-regions base and top address */
+	for (i = 0; i < p.ns_nr; i++) {
+		base = mmio_read_64(addr + addr_offset);
+		top = base + mmio_read_64(addr + size_offset);
+		/*
+		 * translate byte to MB and store info,
+		 * Miniloader will promise every ns-region is MB aligned.
+		 */
+		p.ns_base[i] = RG_SIZE_MB(base);
+		p.ns_top[i] = RG_SIZE_MB(top);
+
+		addr_offset += REGION_DATA_PER_BYTES;
+		size_offset += REGION_DATA_PER_BYTES;
+	}
+
+	/*
+	 * a s-region's base starts from previous ns-region's top, and a
+	 * s-region's top ends with next ns-region's base. maybe like this:
+	 *
+	 *	   case1: ns-regison start from 0MB
+	 *	 -----------------------------------------------
+	 *	 |    ns0   |  S0  |  ns1  |   S1  |    ns2    |
+	 *	0----------------------------------------------- max_mb
+	 *
+	 *
+	 *	   case2: ns-regison not start from 0MB
+	 *	 -----------------------------------------------
+	 *	 |    S0   |  ns0  |  ns1  |   ns2  |    S1    |
+	 *	0----------------------------------------------- max_mb
+	 */
+
+	/* like above case2 figure, ns-region is not start from 0MB */
+	if (p.ns_base[0] != 0) {
+		p.s_base[p.s_nr] = 0;
+		p.s_top[p.s_nr] = p.ns_base[0];
+		p.s_nr++;
+	}
+
+	/*
+	 * notice: if ns-regions not start from 0MB, p.s_nr = 1 now, otherwise 0
+	 */
+	for (i = 0; i < p.ns_nr; i++) {
+		/*
+		 * if current ns-regions top covers boundary,
+		 * that means s-regions are all parsed yet, so finsh.
+		 */
+		if (p.ns_top[i] == p.boundary)
+			goto out;
+
+		/* s-region's base starts from previous ns-region's top */
+		p.s_base[p.s_nr] = p.ns_top[i];
+
+		/* s-region's top ends with next ns-region's base */
+		if (i + 1 < p.ns_nr)
+			p.s_top[p.s_nr] = p.ns_base[i + 1];
+		else
+			p.s_top[p.s_nr] = p.boundary;
+		p.s_nr++;
+	}
+out:
+	return p;
+}
diff --git a/plat/rockchip/common/drivers/parameter/ddr_parameter.h b/plat/rockchip/common/drivers/parameter/ddr_parameter.h
new file mode 100644
index 0000000..2ee3501
--- /dev/null
+++ b/plat/rockchip/common/drivers/parameter/ddr_parameter.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PARAMETER_H__
+#define __PARAMETER_H__
+
+#include <arch_helpers.h>
+#include <console.h>
+#include <debug.h>
+#include <delay_timer.h>
+#include <mmio.h>
+#include <platform_def.h>
+#include <plat_private.h>
+#include <soc.h>
+#include <string.h>
+
+#define DDR_REGION_NR_MAX		10
+#define REGION_NR_OFFSET		0
+#define REGION_ADDR_OFFSET		8
+#define REGION_DATA_PER_BYTES		8
+#define RG_SIZE_MB(byte)		((byte) >> 20)
+
+/* unit: MB */
+struct param_ddr_usage {
+	uint64_t boundary;
+
+	uint32_t ns_nr;
+	uint64_t ns_base[DDR_REGION_NR_MAX];
+	uint64_t ns_top[DDR_REGION_NR_MAX];
+
+	uint32_t s_nr;
+	uint64_t s_base[DDR_REGION_NR_MAX];
+	uint64_t s_top[DDR_REGION_NR_MAX];
+};
+
+struct param_ddr_usage ddr_region_usage_parse(uint64_t addr, uint64_t max_mb);
+
+#endif /* __PARAMETER_H__ */