/*
* Copyright (C) 2014 Charles Manning <cdhmanning@gmail.com>
*
- * 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.
+ * Reference documents:
+ * Cyclone V SoC: https://www.altera.com/content/dam/altera-www/global/en_US/pdfs/literature/hb/cyclone-v/cv_5400a.pdf
+ * Arria V SoC: https://www.altera.com/content/dam/altera-www/global/en_US/pdfs/literature/hb/arria-v/av_5400a.pdf
+ * Arria 10 SoC: https://www.altera.com/content/dam/altera-www/global/en_US/pdfs/literature/hb/arria-10/a10_5400a.pdf
*
- * "Header" is a structure of the following format.
- * this is positioned at 0x40.
+ * Bootable SoCFPGA image requires a structure of the following format
+ * positioned at offset 0x40 of the bootable image. Endian is LSB.
*
- * Endian is LSB.
+ * There are two versions of the SoCFPGA header format, v0 and v1.
+ * The version 0 is used by Cyclone V SoC and Arria V SoC, while
+ * the version 1 is used by the Arria 10 SoC.
*
+ * Version 0:
* 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
+ * 0x40 4 Validation word (0x31305341)
+ * 0x44 1 Version (0x0)
+ * 0x45 1 Flags (unused, zero is fine)
+ * 0x46 2 Length (in units of u32, including the end checksum).
+ * 0x48 2 Zero (0x0)
* 0x4A 2 Checksum over the header. NB Not CRC32
*
+ * Version 1:
+ * Offset Length Usage
+ * -----------------------
+ * 0x40 4 Validation word (0x31305341)
+ * 0x44 1 Version (0x1)
+ * 0x45 1 Flags (unused, zero is fine)
+ * 0x46 2 Header length (in units of u8).
+ * 0x48 4 Length (in units of u8).
+ * 0x4C 4 Image entry offset from standard of header
+ * 0x50 2 Zero (0x0)
+ * 0x52 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 entry offset in version 1 image is relative the the start of
+ * the header, 0x40, and must not be a negative number. Therefore, it is
+ * only possible to make the SoCFPGA jump forward. The U-Boot bootloader
+ * places a trampoline instruction at offset 0x5c, 0x14 bytes from the
+ * start of the SoCFPGA header, which jumps to the reset vector.
+ *
* The image is padded out to 64k, because that is what is
* typically used to write the image to the boot medium.
*/
#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_v0[0x10000];
+static uint8_t buffer_v1[0x40000];
-static uint8_t buffer[PADDED_SIZE];
+struct socfpga_header_v0 {
+ uint32_t validation;
+ uint8_t version;
+ uint8_t flags;
+ uint16_t length_u32;
+ uint16_t zero;
+ uint16_t checksum;
+};
-struct socfpga_header {
- uint32_t validation;
- uint8_t version;
- uint8_t flags;
- uint16_t length_u32;
- uint16_t zero;
- uint16_t checksum;
+struct socfpga_header_v1 {
+ uint32_t validation;
+ uint8_t version;
+ uint8_t flags;
+ uint16_t header_u8;
+ uint32_t length_u8;
+ uint32_t entry_offset;
+ uint16_t zero;
+ uint16_t checksum;
};
+static unsigned int sfp_hdr_size(uint8_t ver)
+{
+ if (ver == 0)
+ return sizeof(struct socfpga_header_v0);
+ if (ver == 1)
+ return sizeof(struct socfpga_header_v1);
+ return 0;
+}
+
+static unsigned int sfp_pad_size(uint8_t ver)
+{
+ if (ver == 0)
+ return sizeof(buffer_v0);
+ if (ver == 1)
+ return sizeof(buffer_v1);
+ return 0;
+}
+
/*
* 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)
+static uint16_t sfp_hdr_checksum(uint8_t *buf, unsigned char ver)
{
- int len = sizeof(*header) - sizeof(header->checksum);
- uint8_t *buf = (uint8_t *)header;
uint16_t ret = 0;
+ int len = sfp_hdr_size(ver) - sizeof(ret);
while (--len)
ret += *buf++;
return ret;
}
-
-static void build_header(uint8_t *buf, uint8_t version, uint8_t flags,
- uint16_t length_bytes)
+static void sfp_build_header(uint8_t *buf, uint8_t ver, uint8_t flags,
+ uint32_t length_bytes)
{
- struct socfpga_header header;
-
- header.validation = cpu_to_le32(VALIDATION_WORD);
- header.version = version;
- header.flags = flags;
- header.length_u32 = cpu_to_le16(length_bytes/4);
- header.zero = 0;
- header.checksum = cpu_to_le16(hdr_checksum(&header));
-
- memcpy(buf, &header, sizeof(header));
+ struct socfpga_header_v0 header_v0 = {
+ .validation = cpu_to_le32(VALIDATION_WORD),
+ .version = 0,
+ .flags = flags,
+ .length_u32 = cpu_to_le16(length_bytes / 4),
+ .zero = 0,
+ };
+
+ struct socfpga_header_v1 header_v1 = {
+ .validation = cpu_to_le32(VALIDATION_WORD),
+ .version = 1,
+ .flags = flags,
+ .header_u8 = cpu_to_le16(sizeof(header_v1)),
+ .length_u8 = cpu_to_le32(length_bytes),
+ .entry_offset = cpu_to_le32(0x14), /* Trampoline offset */
+ .zero = 0,
+ };
+
+ uint16_t csum;
+
+ if (ver == 0) {
+ csum = sfp_hdr_checksum((uint8_t *)&header_v0, 0);
+ header_v0.checksum = cpu_to_le16(csum);
+ memcpy(buf, &header_v0, sizeof(header_v0));
+ } else {
+ csum = sfp_hdr_checksum((uint8_t *)&header_v1, 1);
+ header_v1.checksum = cpu_to_le16(csum);
+ memcpy(buf, &header_v1, sizeof(header_v1));
+ }
}
/*
* Perform a rudimentary verification of header and return
* size of image.
*/
-static int verify_header(const uint8_t *buf)
+static int sfp_verify_header(const uint8_t *buf, uint8_t *ver)
{
- struct socfpga_header header;
+ struct socfpga_header_v0 header_v0;
+ struct socfpga_header_v1 header_v1;
+ uint16_t hdr_csum, sfp_csum;
+ uint32_t img_len;
- memcpy(&header, buf, sizeof(header));
+ /*
+ * Header v0 is always smaller than Header v1 and the validation
+ * word and version field is at the same place, so use Header v0
+ * to check for version during verifiction and upgrade to Header
+ * v1 if needed.
+ */
+ memcpy(&header_v0, buf, sizeof(header_v0));
- if (le32_to_cpu(header.validation) != VALIDATION_WORD)
- return -1;
- if (le16_to_cpu(header.checksum) != hdr_checksum(&header))
+ if (le32_to_cpu(header_v0.validation) != VALIDATION_WORD)
return -1;
- return le16_to_cpu(header.length_u32) * 4;
+ if (header_v0.version == 0) {
+ hdr_csum = le16_to_cpu(header_v0.checksum);
+ sfp_csum = sfp_hdr_checksum((uint8_t *)&header_v0, 0);
+ img_len = le16_to_cpu(header_v0.length_u32) * 4;
+ } else if (header_v0.version == 1) {
+ memcpy(&header_v1, buf, sizeof(header_v1));
+ hdr_csum = le16_to_cpu(header_v1.checksum);
+ sfp_csum = sfp_hdr_checksum((uint8_t *)&header_v1, 1);
+ img_len = le32_to_cpu(header_v1.length_u8);
+ } else { /* Invalid version */
+ return -EINVAL;
+ }
+
+ /* Verify checksum */
+ if (hdr_csum != sfp_csum)
+ return -EINVAL;
+
+ return img_len;
}
/* 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)
+static int sfp_sign_buffer(uint8_t *buf, uint8_t ver, uint8_t flags,
+ int len, int pad_64k)
{
uint32_t calc_crc;
/* Align the length up */
- len = (len + 3) & (~3);
+ len = (len + 3) & ~3;
/* Build header, adding 4 bytes to length to hold the CRC32. */
- build_header(buf + HEADER_OFFSET, version, flags, len + 4);
+ sfp_build_header(buf + HEADER_OFFSET, ver, flags, len + 4);
/* Calculate and apply the CRC */
calc_crc = ~pbl_crc32(0, (char *)buf, len);
if (!pad_64k)
return len + 4;
- return PADDED_SIZE;
+ return sfp_pad_size(ver);
}
/* Verify that the buffer looks sane */
-static int verify_buffer(const uint8_t *buf)
+static int sfp_verify_buffer(const uint8_t *buf)
{
int len; /* Including 32bit CRC */
uint32_t calc_crc;
uint32_t buf_crc;
+ uint8_t ver = 0;
- len = verify_header(buf + HEADER_OFFSET);
+ len = sfp_verify_header(buf + HEADER_OFFSET, &ver);
if (len < 0) {
debug("Invalid header\n");
return -1;
}
- if (len < HEADER_OFFSET || len > PADDED_SIZE) {
+ if (len < HEADER_OFFSET || len > sfp_pad_size(ver)) {
debug("Invalid header length (%i)\n", len);
return -1;
}
/* mkimage glue functions */
static int socfpgaimage_verify_header(unsigned char *ptr, int image_size,
- struct image_tool_params *params)
+ struct image_tool_params *params)
{
- if (image_size != PADDED_SIZE)
+ if (image_size < 0x80)
return -1;
- return verify_buffer(ptr);
+ return sfp_verify_buffer(ptr);
}
static void socfpgaimage_print_header(const void *ptr)
{
- if (verify_buffer(ptr) == 0)
+ if (sfp_verify_buffer(ptr) == 0)
printf("Looks like a sane SOCFPGA preloader\n");
else
printf("Not a sane SOCFPGA preloader\n");
(params->lflag && (params->dflag || params->fflag));
}
-static int socfpgaimage_check_image_types(uint8_t type)
+static int socfpgaimage_check_image_types_v0(uint8_t type)
{
if (type == IH_TYPE_SOCFPGAIMAGE)
return EXIT_SUCCESS;
return EXIT_FAILURE;
}
+static int socfpgaimage_check_image_types_v1(uint8_t type)
+{
+ if (type == IH_TYPE_SOCFPGAIMAGE_V1)
+ 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.
+ * We prepend a fake header big enough to make the file sfp_pad_size().
* This gives us enough space to do what we want later.
*
* Next, socfpgaimage_set_header() is called.
*/
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)
+static int sfp_fake_header_size(unsigned int size, uint8_t ver)
+{
+ return sfp_pad_size(ver) - size;
+}
+
+static int sfp_vrec_header(struct image_tool_params *params,
+ struct image_type_params *tparams, uint8_t ver)
{
struct stat sbuf;
if (params->datafile &&
stat(params->datafile, &sbuf) == 0 &&
- sbuf.st_size <= MAX_INPUT_SIZE) {
+ sbuf.st_size <= (sfp_pad_size(ver) - sizeof(uint32_t))) {
data_size = sbuf.st_size;
- tparams->header_size = FAKE_HEADER_SIZE;
+ tparams->header_size = sfp_fake_header_size(data_size, ver);
}
return 0;
+
}
-static void socfpgaimage_set_header(void *ptr, struct stat *sbuf, int ifd,
- struct image_tool_params *params)
+static int socfpgaimage_vrec_header_v0(struct image_tool_params *params,
+ struct image_type_params *tparams)
+{
+ return sfp_vrec_header(params, tparams, 0);
+}
+
+static int socfpgaimage_vrec_header_v1(struct image_tool_params *params,
+ struct image_type_params *tparams)
+{
+ return sfp_vrec_header(params, tparams, 1);
+}
+
+static void sfp_set_header(void *ptr, unsigned char ver)
{
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.
+ * At this stage we have the sfp_fake_header_size() dummy bytes
+ * followed by data_size image bytes. Total = sfp_pad_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);
+ memmove(buf, buf + sfp_fake_header_size(data_size, ver), data_size);
+ memset(buf + data_size, 0, sfp_fake_header_size(data_size, ver));
+
+ sfp_sign_buffer(buf, ver, 0, data_size, 0);
+}
- sign_buffer(buf, 0, 0, data_size, 0);
+static void socfpgaimage_set_header_v0(void *ptr, struct stat *sbuf, int ifd,
+ struct image_tool_params *params)
+{
+ sfp_set_header(ptr, 0);
+}
+
+static void socfpgaimage_set_header_v1(void *ptr, struct stat *sbuf, int ifd,
+ struct image_tool_params *params)
+{
+ sfp_set_header(ptr, 1);
}
U_BOOT_IMAGE_TYPE(
socfpgaimage,
- "Altera SOCFPGA preloader support",
+ "Altera SoCFPGA Cyclone V / Arria V image support",
+ 0, /* This will be modified by vrec_header() */
+ (void *)buffer_v0,
+ socfpgaimage_check_params,
+ socfpgaimage_verify_header,
+ socfpgaimage_print_header,
+ socfpgaimage_set_header_v0,
+ NULL,
+ socfpgaimage_check_image_types_v0,
+ NULL,
+ socfpgaimage_vrec_header_v0
+);
+
+U_BOOT_IMAGE_TYPE(
+ socfpgaimage_v1,
+ "Altera SoCFPGA Arria10 image support",
0, /* This will be modified by vrec_header() */
- (void *)buffer,
+ (void *)buffer_v1,
socfpgaimage_check_params,
socfpgaimage_verify_header,
socfpgaimage_print_header,
- socfpgaimage_set_header,
+ socfpgaimage_set_header_v1,
NULL,
- socfpgaimage_check_image_types,
+ socfpgaimage_check_image_types_v1,
NULL,
- socfpgaimage_vrec_header
+ socfpgaimage_vrec_header_v1
);
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