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#!/usr/bin/env python
"""
# SPDX-License-Identifier: GPL-2.0+
#
# 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
import logging
import struct
DT_HEADER = """
/*
* This is a generated file.
*/
/dts-v1/;
/ {
description = "FIT image for U-Boot with bl31 (TF-A)";
#address-cells = <1>;
images {
"""
DT_UBOOT = """
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_bl31_node(file, atf_index, phy_addr, elf_entry):
# Append BL31 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, segments):
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"')
if segments > 1:
file.write(',')
for i in range(1, segments):
file.write('"atf_%d"' % (i + 1))
if i != (segments - 1):
file.write(',')
else:
file.write(';\n')
if segments <= 1:
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, segments):
# 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, segments)
cnt = cnt + 1
file.write('\t};\n')
file.write('\n')
def generate_atf_fit_dts_uboot(fit_file, uboot_file_name):
segments = unpack_elf(uboot_file_name)
if len(segments) != 1:
raise ValueError("Invalid u-boot ELF image '%s'" % uboot_file_name)
index, entry, p_paddr, data = segments[0]
fit_file.write(DT_UBOOT % p_paddr)
def generate_atf_fit_dts_bl31(fit_file, bl31_file_name, dtbs_file_name):
segments = unpack_elf(bl31_file_name)
for index, entry, paddr, data in segments:
append_bl31_node(fit_file, index + 1, paddr, entry)
append_fdt_node(fit_file, dtbs_file_name)
fit_file.write(DT_IMAGES_NODE_END)
append_conf_node(fit_file, dtbs_file_name, len(segments))
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
fit_file.write(DT_HEADER)
generate_atf_fit_dts_uboot(fit_file, uboot_file_name)
generate_atf_fit_dts_bl31(fit_file, bl31_file_name, dtbs_file_name)
fit_file.write(DT_END)
if fit_file_name != sys.stdout:
fit_file.close()
def generate_atf_binary(bl31_file_name):
for index, entry, paddr, data in unpack_elf(bl31_file_name):
file_name = 'bl31_0x%08x.bin' % paddr
with open(file_name, "wb") as atf:
atf.write(data)
def unpack_elf(filename):
with open(filename, 'rb') as file:
elf = file.read()
if elf[0:7] != b'\x7fELF\x02\x01\x01' or elf[18:20] != b'\xb7\x00':
raise ValueError("Invalid arm64 ELF file '%s'" % filename)
e_entry, e_phoff = struct.unpack_from('<2Q', elf, 0x18)
e_phentsize, e_phnum = struct.unpack_from('<2H', elf, 0x36)
segments = []
for index in range(e_phnum):
offset = e_phoff + e_phentsize * index
p_type, p_flags, p_offset = struct.unpack_from('<LLQ', elf, offset)
if p_type == 1: # PT_LOAD
p_paddr, p_filesz = struct.unpack_from('<2Q', elf, offset + 0x18)
p_data = elf[p_offset:p_offset + p_filesz]
segments.append((index, e_entry, p_paddr, p_data))
return segments
def main():
uboot_elf = "./u-boot"
fit_its = sys.stdout
if "BL31" in os.environ:
bl31_elf=os.getenv("BL31");
elif os.path.isfile("./bl31.elf"):
bl31_elf = "./bl31.elf"
else:
os.system("echo 'int main(){}' > bl31.c")
os.system("${CROSS_COMPILE}gcc -c bl31.c -o bl31.elf")
bl31_elf = "./bl31.elf"
logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.DEBUG)
logging.warning(' BL31 file bl31.elf NOT found, resulting binary is non-functional')
logging.warning(' Please read Building section in doc/README.rockchip')
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
generate_atf_fit_dts(fit_its, bl31_elf, uboot_elf, dtbs)
generate_atf_binary(bl31_elf)
if __name__ == "__main__":
main()
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