upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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176 lines
6.6 KiB
176 lines
6.6 KiB
#!/usr/bin/env python3
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#we can use binascii instead of zlib
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import os, getopt, sys, zlib
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from elftools.elf.elffile import ELFFile
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def usage(exit_code):
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print("typical usage:")
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print("AXS101:")
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print(sys.argv[0] + \
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" --header-type v1 --arc-id 0x434 --spi-flash-offset 0x0 --image u-boot.bin --elf u-boot")
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print("AXS103:")
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print(sys.argv[0] + \
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" --header-type v2 --arc-id 0x53 --spi-flash-offset 0x200000 --image u-boot.bin --elf u-boot")
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sys.exit(exit_code)
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def elf_get_entry(filename):
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with open(filename, 'rb') as f:
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elffile = ELFFile(f)
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return elffile.header['e_entry']
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def calc_check_sum(filename):
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# Calculate u-boot image check_sum: it is sum of all u-boot binary bytes
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with open(filename, "rb") as file:
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ba = bytearray(file.read())
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return sum(ba) & 0xFF
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def arg_verify(uboot_bin_filename, uboot_elf_filename, header_type):
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if not os.path.isfile(uboot_bin_filename):
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print("uboot bin file not exists: " + uboot_bin_filename)
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sys.exit(2)
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if not os.path.isfile(uboot_elf_filename):
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print("uboot elf file not exists: " + uboot_elf_filename)
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sys.exit(2)
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if header_type not in ("v1", "v2"):
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print("unknown header type: " + header_type)
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print("choose between 'v1' (most likely AXS101) and 'v2' (most likely AXS103)")
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sys.exit(2)
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def main():
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try:
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opts, args = getopt.getopt(sys.argv[1:],
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"ht:a:s:i:l:e:",
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["help", "header-type=", "arc-id=", "spi-flash-offset=", "image=", "elf="])
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except getopt.GetoptError as err:
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print(err)
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usage(2)
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# default filenames
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uboot_elf_filename = "u-boot"
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uboot_bin_filename = "u-boot.bin"
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headerised_filename = "u-boot.head"
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uboot_scrypt_file = "u-boot-update.txt"
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# default values
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spi_flash_offset = 0x200000
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header_type = "v2"
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arc_id = 0x53
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# initial header values: place where preloader will store u-boot binary,
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# should be equal to CONFIG_SYS_TEXT_BASE
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image_copy_adr = 0x81000000
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# initial constant header values, do not change these values
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magic1 = 0xdeadbeafaf # big endian byte order
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magic2 = [ # big endian byte order
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0x20202a2020202020202020202a20202020207c5c2e20202020202e2f7c20202020207c2d,
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0x2e5c2020202f2e2d7c20202020205c2020602d2d2d6020202f20202020202f205f202020,
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0x205f20205c20202020207c205f60712070205f207c2020202020272e5f3d2f205c3d5f2e,
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0x272020202020202020605c202f60202020202020202020202020206f2020202020202020]
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for opt, arg in opts:
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if opt in ('-h', "--help"): usage(0)
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if opt in ('-t', "--header-type"): header_type = arg
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if opt in ('-a', "--arc-id"): arc_id = int(arg, 16)
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if opt in ('-s', "--spi-flash-offset"): spi_flash_offset = int(arg, 16)
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if opt in ('-i', "--image"): uboot_bin_filename = arg
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if opt in ('-e', "--elf"): uboot_elf_filename = arg
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arg_verify(uboot_bin_filename, uboot_elf_filename, header_type)
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uboot_img_size = os.path.getsize(uboot_bin_filename)
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jump_address = elf_get_entry(uboot_elf_filename)
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check_sum = calc_check_sum(uboot_bin_filename)
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# Calculate header adresses depend on header type
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if header_type == "v2":
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image_copy_adr -= 0x4
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uboot_img_size += 0x4
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# we append image so we need to append checksum
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jmpchk_sum = sum(jump_address.to_bytes(4, byteorder='big'))
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check_sum = (check_sum + jmpchk_sum) & 0xFF
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imade_jump_append = True
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else:
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imade_jump_append = False
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# write header to file
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with open(headerised_filename, "wb") as file:
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file.write(arc_id.to_bytes(2, byteorder='little'))
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file.write(uboot_img_size.to_bytes(4, byteorder='little'))
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file.write(check_sum.to_bytes(1, byteorder='little'))
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file.write(image_copy_adr.to_bytes(4, byteorder='little'))
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file.write(magic1.to_bytes(5, byteorder='big'))
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for i in range(16): file.write(0x00.to_bytes(1, byteorder='little'))
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for byte in magic2: file.write(byte.to_bytes(36, byteorder='big'))
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for i in range(224 - len(magic2) * 36):
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file.write(0x00.to_bytes(1, byteorder='little'))
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if imade_jump_append:
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file.write(jump_address.to_bytes(4, byteorder='little'))
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# append u-boot image to header
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with open(headerised_filename, "ab") as fo:
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with open(uboot_bin_filename,'rb') as fi:
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fo.write(fi.read())
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# calc u-boot headerised image CRC32 (will be used by uboot update
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# command for check)
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headerised_image_crc = ""
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with open(headerised_filename, "rb") as fi:
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headerised_image_crc = hex(zlib.crc32(fi.read()) & 0xffffffff)
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load_addr = 0x81000000
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crc_store_adr = load_addr - 0x8
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crc_calc_adr = crc_store_adr - 0x4
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load_size = os.path.getsize(headerised_filename)
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crc_calc_cmd = \
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"crc32 " + hex(load_addr) + " " + hex(load_size) + " " + hex(crc_calc_adr)
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crc_check_cmd = \
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"mw.l " + hex(crc_store_adr) + " " + headerised_image_crc + " && " + \
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crc_calc_cmd + " && " + \
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"cmp.l " + hex(crc_store_adr) + " " + hex(crc_calc_adr) + " 1"
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# make errase size to be allighned by 64K
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if load_size & 0xFFFF == 0:
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errase_size = load_size
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else:
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errase_size = load_size - (load_size & 0xFFFF) + 0x10000
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# Hack to handle n25*** flash protect ops weirdness:
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# protect unlock return fail status is region is already unlock (entire or
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# partially). Same for lock ops.
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# As there is no possibility to check current flash status pretend
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# unlock & lock always success.
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sf_unlock_cmd = \
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"if sf protect unlock 0x0 0x4000000 ; then true ; else true ; fi"
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sf_lock_cmd = \
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"if sf protect lock 0x0 0x4000000 ; then true ; else true ; fi"
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# u-bood CMD to load u-bood with header to SPI flash
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sf_load_image_cmd = \
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"fatload mmc 0:1 " + hex(load_addr) + " " + headerised_filename + " && " + \
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"sf probe 0:0 && " + \
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sf_unlock_cmd + " && " + \
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"sf erase " + hex(spi_flash_offset) + " " + hex(errase_size) + " && " + \
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"sf write " + hex(load_addr) + " " + hex(spi_flash_offset) + " " + hex(load_size) + " && " + \
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sf_lock_cmd
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update_uboot_cmd = sf_load_image_cmd + " && echo \"u-boot update: OK\""
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with open(uboot_scrypt_file, "wb") as fo:
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fo.write(update_uboot_cmd.encode('ascii'))
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if __name__ == "__main__":
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try:
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main()
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except Exception as err:
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print(err)
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sys.exit(2)
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