| #!/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() |
