#!/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 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@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()