diff --git a/tools/rockchip/loaderimage.c b/tools/rockchip/loaderimage.c
index 43cdaa18df..db0cfcd186 100644
--- a/tools/rockchip/loaderimage.c
+++ b/tools/rockchip/loaderimage.c
@@ -18,10 +18,11 @@ extern uint32_t crc32_rk(uint32_t, const unsigned char *, uint32_t);
 #define OPT_UNPACK "--unpack"
 #define OPT_UBOOT "--uboot"
 #define OPT_TRUSTOS "--trustos"
+#define OPT_KERNEL "--kernel"
 #define OPT_SIZE "--size"
 #define OPT_VERSION "--version"
 #define OPT_INFO "--info"
-#define OPT_PREPATH             "--prepath"
+#define OPT_PREPATH "--prepath"
 
 /* pack or unpack */
 #define MODE_PACK 0
@@ -32,6 +33,7 @@ extern uint32_t crc32_rk(uint32_t, const unsigned char *, uint32_t);
 /* image type */
 #define IMAGE_UBOOT 0
 #define IMAGE_TRUST 1
+#define IMAGE_KERNEL 2
 
 /* magic and hash size */
 #define LOADER_MAGIC_SIZE 8
@@ -62,6 +64,14 @@ extern uint32_t crc32_rk(uint32_t, const unsigned char *, uint32_t);
 #define RK_TRUST_MAGIC "TOS     "
 #define RK_TRUST_RUNNING_ADDR (CONFIG_SYS_TEXT_BASE + SZ_128M + SZ_4M)
 
+#define KERNEL_NAME		"kernel"
+#define KERNEL_NUM		1
+#define KERNEL_MAX_SIZE		30720 * 1024
+#define KERNEL_VERSION_STRING	"kernel os"
+
+#define RK_KERNEL_MAGIC		"KERNEL"
+#define RK_KERNEL_RUNNING_ADDR	(CONFIG_SYS_TEXT_BASE + SZ_4M)
+
 typedef struct tag_second_loader_hdr {
 	uint8_t magic[LOADER_MAGIC_SIZE]; /* magic */
 	uint32_t version;
@@ -72,7 +82,8 @@ typedef struct tag_second_loader_hdr {
 	uint32_t hash_len;              /* 20 or 32 , 0 is no hash */
 	uint8_t hash[LOADER_HASH_SIZE]; /* sha */
 
-	uint8_t reserved[1024 - 32 - 32];
+	unsigned int js_hash;			/*js hsah*/
+	unsigned char reserved[1024-32-32-4];
 	uint32_t signTag;     /* 0x4E474953 */
 	uint32_t signlen;     /* maybe 128 or 256 */
 	uint8_t rsaHash[256]; /* maybe 128 or 256, using max size 256 */
@@ -81,7 +92,7 @@ typedef struct tag_second_loader_hdr {
 
 void usage(const char *prog)
 {
-	fprintf(stderr, "Usage: %s [--pack|--unpack] [--uboot|--trustos]\
+	fprintf(stderr, "Usage: %s [--pack|--unpack] [--uboot|--trustos|--kernel]\
 		file_in "
 	        "file_out [load_addr]  [--size] [size number]\
 		[--version] "
@@ -112,6 +123,17 @@ unsigned int str2hex(char *str)
 	return value;
 }
 
+static uint32_t js_hash(uint8_t *buf, uint32_t len)
+{
+	uint32_t hash = 0x47C6A7E6;
+	uint32_t i;
+
+	for (i = 0; i < len; i++)
+		hash ^= ((hash << 5) + buf[i] + (hash >> 2));
+
+	return hash;
+}
+
 int main(int argc, char *argv[])
 {
 	int mode = -1, image = -1;
@@ -152,6 +174,13 @@ int main(int argc, char *argv[])
 			/* detect whether loader address is delivered */
 			if ((argv[i + 1]) && (strncmp(argv[i + 1], "--", 2)))
 				in_loader_addr = str2hex(argv[++i]);
+		} else if (!strcmp(argv[i], OPT_KERNEL)) {
+			image = IMAGE_KERNEL;
+			file_in = argv[++i];
+			file_out = argv[++i];
+			/* detect whether loader address is delivered */
+			if ((argv[i + 1]) && (strncmp(argv[i + 1], "--", 2)))
+				in_loader_addr = str2hex(argv[++i]);
 		} else if (!strcmp(argv[i], OPT_SIZE)) {
 			in_size = strtoul(argv[++i], NULL, 10);
 			/*
@@ -198,6 +227,15 @@ int main(int argc, char *argv[])
 		max_num = in_num ? in_num : TRUST_NUM;
 		loader_addr =
 		        (in_loader_addr == -1) ? RK_TRUST_RUNNING_ADDR : in_loader_addr;
+	} else if (image == IMAGE_KERNEL) {
+		name = KERNEL_NAME;
+		magic = RK_KERNEL_MAGIC;
+		version = KERNEL_VERSION_STRING;
+		max_size = in_size ? in_size : KERNEL_MAX_SIZE;
+		max_num = in_num ? in_num : KERNEL_NUM;
+		loader_addr =
+		        (in_loader_addr == -1) ? RK_KERNEL_RUNNING_ADDR : in_loader_addr;
+
 	} else if (mode == MODE_INFO) {
 
 	} else {
@@ -261,7 +299,7 @@ int main(int argc, char *argv[])
 		hdr.crc32 = crc32_rk(
 		                    0, (const unsigned char *)buf + sizeof(second_loader_hdr), size);
 		printf("crc = 0x%08x\n", hdr.crc32);
-
+		hdr.js_hash = js_hash((uint8_t *)buf + sizeof(second_loader_hdr), size);
 #ifndef CONFIG_SECUREBOOT_SHA256
 		SHA_CTX ctx;
 		uint8_t *sha;
@@ -300,8 +338,11 @@ int main(int argc, char *argv[])
 
 		printf("%s version: %s\n", name, version);
 		memcpy(buf, &hdr, sizeof(second_loader_hdr));
-		for (i = 0; i < max_num; i++)
-			fwrite(buf, max_size, 1, fo);
+		if (image == IMAGE_KERNEL)
+			fwrite(buf, size + sizeof(second_loader_hdr), 1, fo);
+		else
+			for (i = 0; i < max_num; i++)
+				fwrite(buf, max_size, 1, fo);
 
 		printf("pack %s success! \n", file_out);
 		fclose(fi);