Rockchip release bl31.elf file for armv8 SoCs like rk3399, rk3328, the elf have more than one section, we need to decode it first and packed them into u-boot.itb with its file. This script is to generate the its script. Need default bl31.elf in root directory of U-Boot source and dtb as parameter.
Signed-off-by: Kever Yang kever.yang@rock-chips.com ---
Changes in v3: - use python script - adapt for latest spl atf support
Changes in v2: None
arch/arm/mach-rockchip/make_fit_atf.py | 221 +++++++++++++++++++++++++++++++++ 1 file changed, 221 insertions(+) create mode 100755 arch/arm/mach-rockchip/make_fit_atf.py
diff --git a/arch/arm/mach-rockchip/make_fit_atf.py b/arch/arm/mach-rockchip/make_fit_atf.py new file mode 100755 index 0000000..7c6dd57 --- /dev/null +++ b/arch/arm/mach-rockchip/make_fit_atf.py @@ -0,0 +1,221 @@ +#!/usr/bin/env python2 +""" +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 +from elftools.elf.sections import SymbolTableSection +from elftools.elf.segments import Segment, InterpSegment, NoteSegment + +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="""/* + * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd + * + * Minimal dts for a SPL FIT image payload. + * + * SPDX-License-Identifier: GPL-2.0+ X11 + */ +/dts-v1/; + +/ { + description = "Configuration to load ATF before U-Boot"; + #address-cells = <1>; + + images { + uboot@1 { + 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): + """ + Append ATF DT node to input FIT dts file. + """ + data = 'bl31_0x%08x.bin' % phy_addr + print >> file, '\t\tatf@%d {' % atf_index + print >> file, '\t\t\tdescription = "ARM Trusted Firmware";' + print >> file, '\t\t\tdata = /incbin/("%s");' % data + print >> file, '\t\t\ttype = "firmware";' + print >> file, '\t\t\tarch = "arm64";' + print >> file, '\t\t\tos = "arm-trusted-firmware";' + print >> file, '\t\t\tcompression = "none";' + print >> file, '\t\t\tload = <0x%08x>;' % phy_addr + if atf_index == 1: + print >> file, '\t\t\tentry = <0x%08x>;' % phy_addr + print >> file, '\t\t};' + print >> file, '' + +def append_fdt_node(file, dtbs): + """ + Append FDT nodes. + """ + cnt = 1 + for dtb in dtbs: + dtname = os.path.basename(dtb) + print >> file, '\t\tfdt@%d {' % cnt + print >> file, '\t\t\tdescription = "%s";' % dtname + print >> file, '\t\t\tdata = /incbin/("%s");' % dtb + print >> file, '\t\t\ttype = "flat_dt";' + print >> file, '\t\t\tcompression = "none";' + print >> file, '\t\t};' + print >> file, '' + cnt = cnt + 1 + +def append_conf_section(file, cnt, dtname, atf_cnt): + print >> file, '\t\tconfig@%d {' % cnt + print >> file, '\t\t\tdescription = "%s";' % dtname + print >> file, '\t\t\tfirmware = "atf@1";' + print >> file, '\t\t\tloadables = "uboot@1",', + for i in range(1, atf_cnt): + print >> file, '"atf@%d"' % (i+1), + if i != (atf_cnt - 1): + print >> file, ',', + else: + print >> file, ';' + print >> file, '\t\t\tfdt = "fdt@1";' + print >> file, '\t\t};' + print >> file, '' + +def append_conf_node(file, dtbs, atf_cnt): + """ + Append configeration nodes. + """ + cnt = 1 + print >> file, '\tconfigurations {' + print >> file, '\t\tdefault = "config@1";' + for dtb in dtbs: + dtname = os.path.basename(dtb) + append_conf_section(file, cnt, dtname, atf_cnt) + cnt = cnt + 1 + print >> file, '\t};' + print >> file, '' + +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) 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) + + print >> fit_file, DT_HEADER % p_paddr + + with open(bl31_file_name) as bl31_file: + bl31 = ELFFile(bl31_file) + 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) + atf_cnt = i+1 + append_fdt_node(fit_file, dtbs_file_name) + print >> fit_file, '%s' % DT_IMAGES_NODE_END + append_conf_node(fit_file, dtbs_file_name, atf_cnt) + print >> fit_file, '%s' % DT_END + + if fit_file_name != sys.stdout: + fit_file.close() + +def generate_atf_binary(bl31_file_name): + with open(bl31_file_name) 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()