#!/usr/bin/env python2
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"""
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A script to generate FIT image source for rockchip boards
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with ARM Trusted Firmware
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and multiple device trees (given on the command line)
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usage: $0 <dt_name> [<dt_name> [<dt_name] ...]
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"""
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import os
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import sys
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import getopt
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# pip install pyelftools
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from elftools.elf.elffile import ELFFile
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from elftools.elf.sections import SymbolTableSection
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from elftools.elf.segments import Segment, InterpSegment, NoteSegment
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ELF_SEG_P_TYPE='p_type'
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ELF_SEG_P_PADDR='p_paddr'
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ELF_SEG_P_VADDR='p_vaddr'
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ELF_SEG_P_OFFSET='p_offset'
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ELF_SEG_P_FILESZ='p_filesz'
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ELF_SEG_P_MEMSZ='p_memsz'
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DT_HEADER="""/*
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* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
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*
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* Minimal dts for a SPL FIT image payload.
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*
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* SPDX-License-Identifier: GPL-2.0+ X11
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*/
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/dts-v1/;
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/ {
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description = "Configuration to load ATF before U-Boot";
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#address-cells = <1>;
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images {
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uboot {
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description = "U-Boot (64-bit)";
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data = /incbin/("u-boot-nodtb.bin");
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type = "standalone";
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os = "U-Boot";
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arch = "arm64";
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compression = "none";
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load = <0x%08x>;
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hash {
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algo = "sha256";
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};
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};
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"""
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DT_IMAGES_NODE_END="""
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};
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"""
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DT_END="""
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};
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"""
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def append_atf_node(file, atf_index, phy_addr):
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"""
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Append ATF DT node to input FIT dts file.
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"""
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data = 'bl31_0x%08x.bin' % phy_addr
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print >> file, '\t\tatf@%d {' % atf_index
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print >> file, '\t\t\tdescription = \"ARM Trusted Firmware\";'
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print >> file, '\t\t\tdata = /incbin/("%s");' % data
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print >> file, '\t\t\ttype = "firmware";'
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print >> file, '\t\t\tarch = "arm64";'
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print >> file, '\t\t\tos = "arm-trusted-firmware";'
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print >> file, '\t\t\tcompression = "none";'
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print >> file, '\t\t\tload = <0x%08x>;' % phy_addr
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if atf_index == 1:
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print >> file, '\t\t\tentry = <0x%08x>;' % phy_addr
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print >> file, '\t\t\thash {'
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print >> file, '\t\t\t\talgo = "sha256";'
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print >> file, '\t\t\t};'
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print >> file, '\t\t};'
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print >> file, ''
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def append_fdt_node(file, dtbs):
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"""
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Append FDT nodes.
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"""
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cnt = 1
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for dtb in dtbs:
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dtname = os.path.basename(dtb)
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print >> file, '\t\tfdt {'
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print >> file, '\t\t\tdescription = "U-Boot device tree blob";'
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print >> file, '\t\t\tdata = /incbin/("u-boot.dtb");'
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print >> file, '\t\t\ttype = "flat_dt";'
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print >> file, '\t\t\tarch = "arm64";'
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print >> file, '\t\t\tcompression = "none";'
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print >> file, '\t\t\thash {'
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print >> file, '\t\t\t\talgo = "sha256";'
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print >> file, '\t\t\t};'
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print >> file, '\t\t};'
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print >> file, ''
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cnt = cnt + 1
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def append_conf_section(file, cnt, dtname, atf_cnt):
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print >> file, '\t\tconfig {'
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print >> file, '\t\t\tdescription = "Rockchip armv8 with ATF";'
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print >> file, '\t\t\trollback-index = <0x0>;'
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print >> file, '\t\t\tfirmware = "atf@1";'
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print >> file, '\t\t\tloadables = "uboot",',
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for i in range(1, atf_cnt):
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print >> file, '"atf@%d"' % (i+1),
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if i != (atf_cnt - 1):
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print >> file, ',',
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else:
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print >> file, ';'
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print >> file, '\t\t\tfdt = "fdt";'
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print >> file, '\t\t\tsignature {'
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print >> file, '\t\t\t\talgo = "sha256,rsa2048";'
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print >> file, '\t\t\t\tpadding = "pss";'
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print >> file, '\t\t\t\tkey-name-hint = "dev";'
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print >> file, '\t\t\t\tsign-images = "fdt", "firmware", "loadables";'
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print >> file, '\t\t\t};'
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print >> file, '\t\t};'
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print >> file, ''
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def append_conf_node(file, dtbs, atf_cnt):
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"""
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Append configeration nodes.
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"""
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cnt = 1
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print >> file, '\tconfigurations {'
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print >> file, '\t\tdefault = "config";'
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for dtb in dtbs:
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dtname = os.path.basename(dtb)
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append_conf_section(file, cnt, dtname, atf_cnt)
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cnt = cnt + 1
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print >> file, '\t};'
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print >> file, ''
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def generate_atf_fit_dts(fit_file_name, bl31_file_name, uboot_file_name, dtbs_file_name):
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"""
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Generate FIT script for ATF image.
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"""
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if fit_file_name != sys.stdout:
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fit_file = open(fit_file_name, "wb")
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else:
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fit_file = sys.stdout
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num_load_seg = 0
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p_paddr = 0xFFFFFFFF
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with open(uboot_file_name) as uboot_file:
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uboot = ELFFile(uboot_file)
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for i in range(uboot.num_segments()):
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seg = uboot.get_segment(i)
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if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
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p_paddr = seg.__getitem__(ELF_SEG_P_PADDR)
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num_load_seg = num_load_seg + 1
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assert (p_paddr != 0xFFFFFFFF and num_load_seg == 1)
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print >> fit_file, DT_HEADER % p_paddr
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with open(bl31_file_name) as bl31_file:
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bl31 = ELFFile(bl31_file)
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for i in range(bl31.num_segments()):
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seg = bl31.get_segment(i)
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if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
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paddr = seg.__getitem__(ELF_SEG_P_PADDR)
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p= seg.__getitem__(ELF_SEG_P_PADDR)
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append_atf_node(fit_file, i+1, paddr)
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atf_cnt = i+1
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append_fdt_node(fit_file, dtbs_file_name)
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print >> fit_file, '%s' % DT_IMAGES_NODE_END
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append_conf_node(fit_file, dtbs_file_name, atf_cnt)
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print >> fit_file, '%s' % DT_END
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if fit_file_name != sys.stdout:
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fit_file.close()
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def generate_atf_binary(bl31_file_name):
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with open(bl31_file_name) as bl31_file:
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bl31 = ELFFile(bl31_file)
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num = bl31.num_segments()
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for i in range(num):
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seg = bl31.get_segment(i)
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if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
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paddr = seg.__getitem__(ELF_SEG_P_PADDR)
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file_name = 'bl31_0x%08x.bin' % paddr
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with open(file_name, "wb") as atf:
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atf.write(seg.data());
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def get_bl31_segments_info(bl31_file_name):
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"""
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Get load offset, physical offset, file size
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from bl31 elf file program headers.
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"""
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with open(bl31_file_name) as bl31_file:
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bl31 = ELFFile(bl31_file)
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num = bl31.num_segments()
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print 'Number of Segments : %d' % bl31.num_segments()
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for i in range(num):
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print 'Segment %d' % i
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seg = bl31.get_segment(i)
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ptype = seg[ELF_SEG_P_TYPE]
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poffset = seg[ELF_SEG_P_OFFSET]
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pmemsz = seg[ELF_SEG_P_MEMSZ]
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pfilesz = seg[ELF_SEG_P_FILESZ]
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print 'type: %s\nfilesz: %08x\nmemsz: %08x\noffset: %08x' % (ptype, pfilesz, pmemsz, poffset)
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paddr = seg[ELF_SEG_P_PADDR]
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print 'paddr: %08x' % paddr
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def main():
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uboot_elf="./u-boot"
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bl31_elf="./bl31.elf"
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FIT_ITS=sys.stdout
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opts, args = getopt.getopt(sys.argv[1:], "o:u:b:h")
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for opt, val in opts:
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if opt == "-o":
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FIT_ITS=val
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elif opt == "-u":
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uboot_elf=val
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elif opt == "-b":
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bl31_elf=val
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elif opt == "-h":
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print __doc__
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sys.exit(2)
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dtbs = args
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#get_bl31_segments_info("u-boot")
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#get_bl31_segments_info("bl31.elf")
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generate_atf_fit_dts(FIT_ITS, bl31_elf, uboot_elf, dtbs)
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generate_atf_binary(bl31_elf);
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if __name__ == "__main__":
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main()
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