mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 00:48:52 +09:00
![Eugeniy Paltsev](/assets/img/avatar_default.png)
HSDK board has preloader that reads SPI flash pages and searches for a special image header to fetch and load binary. Add tool, make target (bsp-generate) to generate update script and u-boot binary image with header for preloader. Also add script to default environment to apply updates. Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
150 lines
5.5 KiB
Python
150 lines
5.5 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
|
|
#
|
|
# Copyright (C) 2018 Synopsys, Inc. All rights reserved.
|
|
# Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
|
|
|
|
import os, getopt, sys, zlib
|
|
from elftools.elf.elffile import ELFFile
|
|
|
|
|
|
def usage(exit_code):
|
|
print("usage:")
|
|
print(sys.argv[0] + " --arc-id 0x52 --image u-boot.bin --elf u-boot")
|
|
sys.exit(exit_code)
|
|
|
|
|
|
def elf_get_entry(filename):
|
|
with open(filename, 'rb') as f:
|
|
elffile = ELFFile(f)
|
|
return elffile.header['e_entry']
|
|
|
|
|
|
def calc_check_sum(filename):
|
|
# u-boot.head check_sum for preloader - it is sum of all u-boot binary bytes
|
|
with open(filename, "rb") as file:
|
|
ba = bytearray(file.read())
|
|
return sum(ba) & 0xFF
|
|
|
|
|
|
def arg_verify(uboot_bin_filename, uboot_elf_filename, arc_id):
|
|
if arc_id not in [0x52, 0x53]:
|
|
print("unknown ARC ID: " + hex(arc_id))
|
|
sys.exit(2)
|
|
|
|
if not os.path.isfile(uboot_bin_filename):
|
|
print("uboot bin file not exists: " + uboot_bin_filename)
|
|
sys.exit(2)
|
|
|
|
if not os.path.isfile(uboot_elf_filename):
|
|
print("uboot elf file not exists: " + uboot_elf_filename)
|
|
sys.exit(2)
|
|
|
|
|
|
def main():
|
|
try:
|
|
opts, args = getopt.getopt(sys.argv[1:],
|
|
"ha:i:l:e:", ["help", "arc-id=", "image=", "elf="])
|
|
except getopt.GetoptError as err:
|
|
print(err)
|
|
usage(2)
|
|
|
|
# default filenames
|
|
uboot_elf_filename = "u-boot"
|
|
uboot_bin_filename = "u-boot.bin"
|
|
headerised_filename = "u-boot.head"
|
|
uboot_scrypt_file = "u-boot-update.txt"
|
|
|
|
# initial header values: place where preloader will store u-boot binary,
|
|
# should be equal to CONFIG_SYS_TEXT_BASE
|
|
image_copy_adr = 0x81000000
|
|
|
|
# initial constant header values, do not change these values
|
|
arc_id = 0x52 # 0x52 for 1st HSDK release (hardcoded in RTL)
|
|
magic1 = 0xdeadbeafaf # big endian byte order
|
|
flash_address = 0x0
|
|
flash_type = 0x0 # 0 - SPI flash, 1 - NOR flash
|
|
magic2 = [ # big endian byte order
|
|
0x20202a2020202020202020202a20202020207c5c2e20202020202e2f7c20202020207c2d,
|
|
0x2e5c2020202f2e2d7c20202020205c2020602d2d2d6020202f20202020202f205f202020,
|
|
0x205f20205c20202020207c205f60712070205f207c2020202020272e5f3d2f205c3d5f2e,
|
|
0x272020202020202020605c202f60202020202020202020202020206f2020202020202020]
|
|
|
|
for opt, arg in opts:
|
|
if opt in ('-h', "--help"): usage(0)
|
|
if opt in ('-a', "--arc-id"): arc_id = int(arg, 16)
|
|
if opt in ('-i', "--image"): uboot_bin_filename = arg
|
|
if opt in ('-e', "--elf"): uboot_elf_filename = arg
|
|
|
|
arg_verify(uboot_bin_filename, uboot_elf_filename, arc_id)
|
|
|
|
uboot_img_size = os.path.getsize(uboot_bin_filename)
|
|
jump_address = elf_get_entry(uboot_elf_filename)
|
|
check_sum = calc_check_sum(uboot_bin_filename)
|
|
|
|
# write header to file
|
|
with open(headerised_filename, "wb") as file:
|
|
file.write(arc_id.to_bytes(2, byteorder='little'))
|
|
file.write(uboot_img_size.to_bytes(4, byteorder='little'))
|
|
file.write(check_sum.to_bytes(1, byteorder='little'))
|
|
file.write(image_copy_adr.to_bytes(4, byteorder='little'))
|
|
file.write(magic1.to_bytes(5, byteorder='big'))
|
|
file.write(jump_address.to_bytes(4, byteorder='little'))
|
|
for i in range(12): file.write(0xFF.to_bytes(1, byteorder='little'))
|
|
for byte in magic2: file.write(byte.to_bytes(36, byteorder='big'))
|
|
for i in range(208 - len(magic2) * 36):
|
|
file.write(0xFF.to_bytes(1, byteorder='little'))
|
|
file.write(flash_address.to_bytes(4, byteorder='little'))
|
|
for i in range(11): file.write(0xFF.to_bytes(1, byteorder='little'))
|
|
file.write(flash_type.to_bytes(1, byteorder='little'))
|
|
|
|
# append u-boot image to header
|
|
with open(headerised_filename, "ab") as fo:
|
|
with open(uboot_bin_filename,'rb') as fi:
|
|
fo.write(fi.read())
|
|
|
|
# calc u-boot headerized image CRC32 (will be used by uboot update
|
|
# command for check)
|
|
headerised_image_crc = ""
|
|
with open(headerised_filename, "rb") as fi:
|
|
headerised_image_crc = hex(zlib.crc32(fi.read()) & 0xffffffff)
|
|
|
|
load_addr = 0x81000000
|
|
crc_store_adr = load_addr - 0x8
|
|
crc_calc_adr = crc_store_adr - 0x4
|
|
load_size = os.path.getsize(headerised_filename)
|
|
crc_calc_cmd = \
|
|
"crc32 " + hex(load_addr) + " " + hex(load_size) + " " + hex(crc_calc_adr)
|
|
crc_check_cmd = \
|
|
"mw.l " + hex(crc_store_adr) + " " + headerised_image_crc + " && " + \
|
|
crc_calc_cmd + " && " + \
|
|
"cmp.l " + hex(crc_store_adr) + " " + hex(crc_calc_adr) + " 1"
|
|
|
|
# make errase size to be allighned by 64K
|
|
if load_size & 0xFFFF == 0:
|
|
errase_size = load_size
|
|
else:
|
|
errase_size = load_size - (load_size & 0xFFFF) + 0x10000
|
|
|
|
# u-bood CMD to load u-bood with header to SPI flash
|
|
sf_load_image_cmd = \
|
|
"fatload mmc 0:1 " + hex(load_addr) + " " + headerised_filename + " && " + \
|
|
"sf probe 0:0 && " + \
|
|
crc_check_cmd + " && " + \
|
|
"sf protect unlock 0x0 " + hex(errase_size) + " && " + \
|
|
"sf erase 0x0 " + hex(errase_size) + " && " + \
|
|
"sf write " + hex(load_addr) + " 0x0 " + hex(load_size) + " && " + \
|
|
"sf protect lock 0x0 " + hex(errase_size)
|
|
|
|
update_uboot_cmd = sf_load_image_cmd + " && echo \"u-boot update: OK\""
|
|
|
|
with open(uboot_scrypt_file, "wb") as fo:
|
|
fo.write(update_uboot_cmd.encode('ascii'))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
try:
|
|
main()
|
|
except Exception as err:
|
|
print(err)
|
|
sys.exit(2)
|