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#!/usr/bin/env python
"""
A script to generate FIT image source for rockchip boards
with ARM Trusted Firmware
and multiple device trees (given on the command line)
usage: $0 <dt_name> [<dt_name> [<dt_name] ...]
"""
import os
import sys
import getopt
# pip install pyelftools
from elftools.elf.elffile import ELFFile
ELF_SEG_P_TYPE='p_type'
ELF_SEG_P_PADDR='p_paddr'
ELF_SEG_P_VADDR='p_vaddr'
ELF_SEG_P_OFFSET='p_offset'
ELF_SEG_P_FILESZ='p_filesz'
ELF_SEG_P_MEMSZ='p_memsz'
DT_HEADER="""// SPDX-License-Identifier: GPL-2.0+ OR X11
/*
* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
*
* Minimal dts for a SPL FIT image payload.
*/
/dts-v1/;
/ {
description = "Configuration to load ATF before U-Boot";
#address-cells = <1>;
images {
uboot {
description = "U-Boot (64-bit)";
data = /incbin/("u-boot-nodtb.bin");
type = "standalone";
os = "U-Boot";
arch = "arm64";
compression = "none";
load = <0x%08x>;
};
"""
DT_IMAGES_NODE_END="""
};
"""
DT_END="""
};
"""
def append_atf_node(file, atf_index, phy_addr, elf_entry):
"""
Append ATF DT node to input FIT dts file.
"""
data = 'bl31_0x%08x.bin' % phy_addr
file.write('\t\tatf_%d {\n' % atf_index)
file.write('\t\t\tdescription = \"ARM Trusted Firmware\";\n')
file.write('\t\t\tdata = /incbin/("%s");\n' % data)
file.write('\t\t\ttype = "firmware";\n')
file.write('\t\t\tarch = "arm64";\n')
file.write('\t\t\tos = "arm-trusted-firmware";\n')
file.write('\t\t\tcompression = "none";\n')
file.write('\t\t\tload = <0x%08x>;\n' % phy_addr)
if atf_index == 1:
file.write('\t\t\tentry = <0x%08x>;\n' % elf_entry)
file.write('\t\t};\n')
file.write('\n')
def append_fdt_node(file, dtbs):
"""
Append FDT nodes.
"""
cnt = 1
for dtb in dtbs:
dtname = os.path.basename(dtb)
file.write('\t\tfdt_%d {\n' % cnt)
file.write('\t\t\tdescription = "%s";\n' % dtname)
file.write('\t\t\tdata = /incbin/("%s");\n' % dtb)
file.write('\t\t\ttype = "flat_dt";\n')
file.write('\t\t\tcompression = "none";\n')
file.write('\t\t};\n')
file.write('\n')
cnt = cnt + 1
def append_conf_section(file, cnt, dtname, atf_cnt):
file.write('\t\tconfig_%d {\n' % cnt)
file.write('\t\t\tdescription = "%s";\n' % dtname)
file.write('\t\t\tfirmware = "atf_1";\n')
file.write('\t\t\tloadables = "uboot",')
for i in range(1, atf_cnt):
file.write('"atf_%d"' % (i+1))
if i != (atf_cnt - 1):
file.write(',')
else:
file.write(';\n')
file.write('\t\t\tfdt = "fdt_1";\n')
file.write('\t\t};\n')
file.write('\n')
def append_conf_node(file, dtbs, atf_cnt):
"""
Append configeration nodes.
"""
cnt = 1
file.write('\tconfigurations {\n')
file.write('\t\tdefault = "config_1";\n')
for dtb in dtbs:
dtname = os.path.basename(dtb)
append_conf_section(file, cnt, dtname, atf_cnt)
cnt = cnt + 1
file.write('\t};\n')
file.write('\n')
def generate_atf_fit_dts(fit_file_name, bl31_file_name, uboot_file_name, dtbs_file_name):
"""
Generate FIT script for ATF image.
"""
if fit_file_name != sys.stdout:
fit_file = open(fit_file_name, "wb")
else:
fit_file = sys.stdout
num_load_seg = 0
p_paddr = 0xFFFFFFFF
with open(uboot_file_name, 'rb') as uboot_file:
uboot = ELFFile(uboot_file)
for i in range(uboot.num_segments()):
seg = uboot.get_segment(i)
if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
p_paddr = seg.__getitem__(ELF_SEG_P_PADDR)
num_load_seg = num_load_seg + 1
assert (p_paddr != 0xFFFFFFFF and num_load_seg == 1)
fit_file.write(DT_HEADER % p_paddr)
with open(bl31_file_name, 'rb') as bl31_file:
bl31 = ELFFile(bl31_file)
elf_entry = bl31.header['e_entry']
for i in range(bl31.num_segments()):
seg = bl31.get_segment(i)
if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
paddr = seg.__getitem__(ELF_SEG_P_PADDR)
p= seg.__getitem__(ELF_SEG_P_PADDR)
append_atf_node(fit_file, i+1, paddr, elf_entry)
atf_cnt = i+1
append_fdt_node(fit_file, dtbs_file_name)
fit_file.write('%s\n' % DT_IMAGES_NODE_END)
append_conf_node(fit_file, dtbs_file_name, atf_cnt)
fit_file.write('%s\n' % DT_END)
if fit_file_name != sys.stdout:
fit_file.close()
def generate_atf_binary(bl31_file_name):
with open(bl31_file_name, 'rb') as bl31_file:
bl31 = ELFFile(bl31_file)
num = bl31.num_segments()
for i in range(num):
seg = bl31.get_segment(i)
if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
paddr = seg.__getitem__(ELF_SEG_P_PADDR)
file_name = 'bl31_0x%08x.bin' % paddr
with open(file_name, "wb") as atf:
atf.write(seg.data());
def get_bl31_segments_info(bl31_file_name):
"""
Get load offset, physical offset, file size
from bl31 elf file program headers.
"""
with open(bl31_file_name) as bl31_file:
bl31 = ELFFile(bl31_file)
num = bl31.num_segments()
print('Number of Segments : %d' % bl31.num_segments())
for i in range(num):
print('Segment %d' % i)
seg = bl31.get_segment(i)
ptype = seg[ELF_SEG_P_TYPE]
poffset = seg[ELF_SEG_P_OFFSET]
pmemsz = seg[ELF_SEG_P_MEMSZ]
pfilesz = seg[ELF_SEG_P_FILESZ]
print('type: %s\nfilesz: %08x\nmemsz: %08x\noffset: %08x' % (ptype, pfilesz, pmemsz, poffset))
paddr = seg[ELF_SEG_P_PADDR]
print('paddr: %08x' % paddr)
def main():
uboot_elf="./u-boot"
bl31_elf="./bl31.elf"
FIT_ITS=sys.stdout
opts, args = getopt.getopt(sys.argv[1:], "o:u:b:h")
for opt, val in opts:
if opt == "-o":
FIT_ITS=val
elif opt == "-u":
uboot_elf=val
elif opt == "-b":
bl31_elf=val
elif opt == "-h":
print(__doc__)
sys.exit(2)
dtbs = args
#get_bl31_segments_info("u-boot")
#get_bl31_segments_info("bl31.elf")
generate_atf_fit_dts(FIT_ITS, bl31_elf, uboot_elf, dtbs)
generate_atf_binary(bl31_elf);
if __name__ == "__main__":
main()
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