diff --git a/tools/Makefile b/tools/Makefile
index 90e966d..2b05b20 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -87,6 +87,7 @@
 			os_support.o \
 			pblimage.o \
 			pbl_crc32.o \
+			socfpgaimage.o \
 			lib/sha1.o \
 			lib/sha256.o \
 			ublimage.o \
diff --git a/tools/imagetool.c b/tools/imagetool.c
index 32d6278..98717bd 100644
--- a/tools/imagetool.c
+++ b/tools/imagetool.c
@@ -47,6 +47,8 @@
 	init_ubl_image_type();
 	/* Init Davinci AIS support */
 	init_ais_image_type();
+	/* Init Altera SOCFPGA support */
+	init_socfpga_image_type();
 	/* Init TI Keystone boot image generation/list support */
 	init_gpimage_type();
 }
diff --git a/tools/imagetool.h b/tools/imagetool.h
index c8af0e8..8bce059 100644
--- a/tools/imagetool.h
+++ b/tools/imagetool.h
@@ -168,6 +168,7 @@
 void init_fit_image_type(void);
 void init_ubl_image_type(void);
 void init_omap_image_type(void);
+void init_socfpga_image_type(void);
 void init_gpimage_type(void);
 
 void pbl_load_uboot(int fd, struct image_tool_params *mparams);
diff --git a/tools/socfpgaimage.c b/tools/socfpgaimage.c
new file mode 100644
index 0000000..396d8a5
--- /dev/null
+++ b/tools/socfpgaimage.c
@@ -0,0 +1,259 @@
+/*
+ * Copyright (C) 2014 Charles Manning <cdhmanning@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * Reference doc http://www.altera.com.cn/literature/hb/cyclone-v/cv_5400A.pdf
+ * Note this doc is not entirely accurate. Of particular interest to us is the
+ * "header" length field being in U32s and not bytes.
+ *
+ * "Header" is a structure of the following format.
+ * this is positioned at 0x40.
+ *
+ * Endian is LSB.
+ *
+ * Offset   Length   Usage
+ * -----------------------
+ *   0x40        4   Validation word 0x31305341
+ *   0x44        1   Version (whatever, zero is fine)
+ *   0x45        1   Flags   (unused, zero is fine)
+ *   0x46        2   Length  (in units of u32, including the end checksum).
+ *   0x48        2   Zero
+ *   0x4A        2   Checksum over the header. NB Not CRC32
+ *
+ * At the end of the code we have a 32-bit CRC checksum over whole binary
+ * excluding the CRC.
+ *
+ * Note that the CRC used here is **not** the zlib/Adler crc32. It is the
+ * CRC-32 used in bzip2, ethernet and elsewhere.
+ *
+ * The image is padded out to 64k, because that is what is
+ * typically used to write the image to the boot medium.
+ */
+
+#include "pbl_crc32.h"
+#include "imagetool.h"
+#include <image.h>
+
+#define HEADER_OFFSET	0x40
+#define VALIDATION_WORD	0x31305341
+#define PADDED_SIZE	0x10000
+
+/* To allow for adding CRC, the max input size is a bit smaller. */
+#define MAX_INPUT_SIZE	(PADDED_SIZE - sizeof(uint32_t))
+
+static uint8_t buffer[PADDED_SIZE];
+
+static struct socfpga_header {
+	uint32_t validation;
+	uint8_t  version;
+	uint8_t  flags;
+	uint16_t length_u32;
+	uint16_t zero;
+	uint16_t checksum;
+} header;
+
+/*
+ * The header checksum is just a very simple checksum over
+ * the header area.
+ * There is still a crc32 over the whole lot.
+ */
+static uint16_t hdr_checksum(struct socfpga_header *header)
+{
+	int len = sizeof(*header) - sizeof(header->checksum);
+	uint8_t *buf = (uint8_t *)header;
+	uint16_t ret = 0;
+
+	while (--len)
+		ret += *buf++;
+
+	return ret;
+}
+
+
+static void build_header(uint8_t *buf, uint8_t version, uint8_t flags,
+			 uint16_t length_bytes)
+{
+	header.validation = htole32(VALIDATION_WORD);
+	header.version = version;
+	header.flags = flags;
+	header.length_u32 = htole16(length_bytes/4);
+	header.zero = 0;
+	header.checksum = htole16(hdr_checksum(&header));
+
+	memcpy(buf, &header, sizeof(header));
+}
+
+/*
+ * Perform a rudimentary verification of header and return
+ * size of image.
+ */
+static int verify_header(const uint8_t *buf)
+{
+	memcpy(&header, buf, sizeof(header));
+
+	if (le32toh(header.validation) != VALIDATION_WORD)
+		return -1;
+	if (le16toh(header.checksum) != hdr_checksum(&header))
+		return -1;
+
+	return le16toh(header.length_u32) * 4;
+}
+
+/* Sign the buffer and return the signed buffer size */
+static int sign_buffer(uint8_t *buf,
+			uint8_t version, uint8_t flags,
+			int len, int pad_64k)
+{
+	uint32_t calc_crc;
+
+	/* Align the length up */
+	len = (len + 3) & (~3);
+
+	/* Build header, adding 4 bytes to length to hold the CRC32. */
+	build_header(buf + HEADER_OFFSET,  version, flags, len + 4);
+
+	/* Calculate and apply the CRC */
+	calc_crc = ~pbl_crc32(0, (char *)buf, len);
+
+	*((uint32_t *)(buf + len)) = htole32(calc_crc);
+
+	if (!pad_64k)
+		return len + 4;
+
+	return PADDED_SIZE;
+}
+
+/* Verify that the buffer looks sane */
+static int verify_buffer(const uint8_t *buf)
+{
+	int len; /* Including 32bit CRC */
+	uint32_t calc_crc;
+	uint32_t buf_crc;
+
+	len = verify_header(buf + HEADER_OFFSET);
+	if (len < 0) {
+		fprintf(stderr, "Invalid header\n");
+		return -1;
+	}
+
+	if (len < HEADER_OFFSET || len > PADDED_SIZE) {
+		fprintf(stderr, "Invalid header length (%i)\n", len);
+		return -1;
+	}
+
+	/*
+	 * Adjust length to the base of the CRC.
+	 * Check the CRC.
+	*/
+	len -= 4;
+
+	calc_crc = ~pbl_crc32(0, (const char *)buf, len);
+
+	buf_crc = le32toh(*((uint32_t *)(buf + len)));
+
+	if (buf_crc != calc_crc) {
+		fprintf(stderr, "CRC32 does not match (%08x != %08x)\n",
+			buf_crc, calc_crc);
+		return -1;
+	}
+
+	return 0;
+}
+
+/* mkimage glue functions */
+static int socfpgaimage_verify_header(unsigned char *ptr, int image_size,
+			struct image_tool_params *params)
+{
+	if (image_size != PADDED_SIZE)
+		return -1;
+
+	return verify_buffer(ptr);
+}
+
+static void socfpgaimage_print_header(const void *ptr)
+{
+	if (verify_buffer(ptr) == 0)
+		printf("Looks like a sane SOCFPGA preloader\n");
+	else
+		printf("Not a sane SOCFPGA preloader\n");
+}
+
+static int socfpgaimage_check_params(struct image_tool_params *params)
+{
+	/* Not sure if we should be accepting fflags */
+	return	(params->dflag && (params->fflag || params->lflag)) ||
+		(params->fflag && (params->dflag || params->lflag)) ||
+		(params->lflag && (params->dflag || params->fflag));
+}
+
+static int socfpgaimage_check_image_types(uint8_t type)
+{
+	if (type == IH_TYPE_SOCFPGAIMAGE)
+		return EXIT_SUCCESS;
+	return EXIT_FAILURE;
+}
+
+/*
+ * To work in with the mkimage framework, we do some ugly stuff...
+ *
+ * First, socfpgaimage_vrec_header() is called.
+ * We prepend a fake header big enough to make the file PADDED_SIZE.
+ * This gives us enough space to do what we want later.
+ *
+ * Next, socfpgaimage_set_header() is called.
+ * We fix up the buffer by moving the image to the start of the buffer.
+ * We now have some room to do what we need (add CRC and padding).
+ */
+
+static int data_size;
+#define FAKE_HEADER_SIZE (PADDED_SIZE - data_size)
+
+static int socfpgaimage_vrec_header(struct image_tool_params *params,
+				struct image_type_params *tparams)
+{
+	struct stat sbuf;
+
+	if (params->datafile &&
+	    stat(params->datafile, &sbuf) == 0 &&
+	    sbuf.st_size <= MAX_INPUT_SIZE) {
+		data_size = sbuf.st_size;
+		tparams->header_size = FAKE_HEADER_SIZE;
+	}
+	return 0;
+}
+
+static void socfpgaimage_set_header(void *ptr, struct stat *sbuf, int ifd,
+				struct image_tool_params *params)
+{
+	uint8_t *buf = (uint8_t *)ptr;
+
+	/*
+	 * This function is called after vrec_header() has been called.
+	 * At this stage we have the FAKE_HEADER_SIZE dummy bytes followed by
+	 * data_size image bytes. Total = PADDED_SIZE.
+	 * We need to fix the buffer by moving the image bytes back to
+	 * the beginning of the buffer, then actually do the signing stuff...
+	 */
+	memmove(buf, buf + FAKE_HEADER_SIZE, data_size);
+	memset(buf + data_size, 0, FAKE_HEADER_SIZE);
+
+	sign_buffer(buf, 0, 0, data_size, 0);
+}
+
+static struct image_type_params socfpgaimage_params = {
+	.name		= "Altera SOCFPGA preloader support",
+	.vrec_header	= socfpgaimage_vrec_header,
+	.header_size	= 0, /* This will be modified by vrec_header() */
+	.hdr		= (void *)buffer,
+	.check_image_type = socfpgaimage_check_image_types,
+	.verify_header	= socfpgaimage_verify_header,
+	.print_header	= socfpgaimage_print_header,
+	.set_header	= socfpgaimage_set_header,
+	.check_params	= socfpgaimage_check_params,
+};
+
+void init_socfpga_image_type(void)
+{
+	register_image_type(&socfpgaimage_params);
+}