3 A script to generate FIT image source for rockchip boards
4 with ARM Trusted Firmware
5 and multiple device trees (given on the command line)
7 usage: $0 <dt_name> [<dt_name> [<dt_name] ...]
14 # pip install pyelftools
15 from elftools.elf.elffile import ELFFile
17 ELF_SEG_P_TYPE='p_type'
18 ELF_SEG_P_PADDR='p_paddr'
19 ELF_SEG_P_VADDR='p_vaddr'
20 ELF_SEG_P_OFFSET='p_offset'
21 ELF_SEG_P_FILESZ='p_filesz'
22 ELF_SEG_P_MEMSZ='p_memsz'
24 DT_HEADER="""// SPDX-License-Identifier: GPL-2.0+ OR X11
26 * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
28 * Minimal dts for a SPL FIT image payload.
33 description = "Configuration to load ATF before U-Boot";
38 description = "U-Boot (64-bit)";
39 data = /incbin/("u-boot-nodtb.bin");
49 DT_IMAGES_NODE_END="""
57 def append_atf_node(file, atf_index, phy_addr, elf_entry):
59 Append ATF DT node to input FIT dts file.
61 data = 'bl31_0x%08x.bin' % phy_addr
62 file.write('\t\tatf_%d {\n' % atf_index)
63 file.write('\t\t\tdescription = \"ARM Trusted Firmware\";\n')
64 file.write('\t\t\tdata = /incbin/("%s");\n' % data)
65 file.write('\t\t\ttype = "firmware";\n')
66 file.write('\t\t\tarch = "arm64";\n')
67 file.write('\t\t\tos = "arm-trusted-firmware";\n')
68 file.write('\t\t\tcompression = "none";\n')
69 file.write('\t\t\tload = <0x%08x>;\n' % phy_addr)
71 file.write('\t\t\tentry = <0x%08x>;\n' % elf_entry)
72 file.write('\t\t};\n')
75 def append_fdt_node(file, dtbs):
81 dtname = os.path.basename(dtb)
82 file.write('\t\tfdt_%d {\n' % cnt)
83 file.write('\t\t\tdescription = "%s";\n' % dtname)
84 file.write('\t\t\tdata = /incbin/("%s");\n' % dtb)
85 file.write('\t\t\ttype = "flat_dt";\n')
86 file.write('\t\t\tcompression = "none";\n')
87 file.write('\t\t};\n')
91 def append_conf_section(file, cnt, dtname, atf_cnt):
92 file.write('\t\tconfig_%d {\n' % cnt)
93 file.write('\t\t\tdescription = "%s";\n' % dtname)
94 file.write('\t\t\tfirmware = "atf_1";\n')
95 file.write('\t\t\tloadables = "uboot",')
96 for i in range(1, atf_cnt):
97 file.write('"atf_%d"' % (i+1))
98 if i != (atf_cnt - 1):
102 file.write('\t\t\tfdt = "fdt_1";\n')
103 file.write('\t\t};\n')
106 def append_conf_node(file, dtbs, atf_cnt):
108 Append configeration nodes.
111 file.write('\tconfigurations {\n')
112 file.write('\t\tdefault = "config_1";\n')
114 dtname = os.path.basename(dtb)
115 append_conf_section(file, cnt, dtname, atf_cnt)
120 def generate_atf_fit_dts(fit_file_name, bl31_file_name, uboot_file_name, dtbs_file_name):
122 Generate FIT script for ATF image.
124 if fit_file_name != sys.stdout:
125 fit_file = open(fit_file_name, "wb")
127 fit_file = sys.stdout
131 with open(uboot_file_name, 'rb') as uboot_file:
132 uboot = ELFFile(uboot_file)
133 for i in range(uboot.num_segments()):
134 seg = uboot.get_segment(i)
135 if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
136 p_paddr = seg.__getitem__(ELF_SEG_P_PADDR)
137 num_load_seg = num_load_seg + 1
139 assert (p_paddr != 0xFFFFFFFF and num_load_seg == 1)
141 fit_file.write(DT_HEADER % p_paddr)
143 with open(bl31_file_name, 'rb') as bl31_file:
144 bl31 = ELFFile(bl31_file)
145 elf_entry = bl31.header['e_entry']
146 for i in range(bl31.num_segments()):
147 seg = bl31.get_segment(i)
148 if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
149 paddr = seg.__getitem__(ELF_SEG_P_PADDR)
150 p= seg.__getitem__(ELF_SEG_P_PADDR)
151 append_atf_node(fit_file, i+1, paddr, elf_entry)
153 append_fdt_node(fit_file, dtbs_file_name)
154 fit_file.write('%s\n' % DT_IMAGES_NODE_END)
155 append_conf_node(fit_file, dtbs_file_name, atf_cnt)
156 fit_file.write('%s\n' % DT_END)
158 if fit_file_name != sys.stdout:
161 def generate_atf_binary(bl31_file_name):
162 with open(bl31_file_name, 'rb') as bl31_file:
163 bl31 = ELFFile(bl31_file)
165 num = bl31.num_segments()
167 seg = bl31.get_segment(i)
168 if ('PT_LOAD' == seg.__getitem__(ELF_SEG_P_TYPE)):
169 paddr = seg.__getitem__(ELF_SEG_P_PADDR)
170 file_name = 'bl31_0x%08x.bin' % paddr
171 with open(file_name, "wb") as atf:
172 atf.write(seg.data());
174 def get_bl31_segments_info(bl31_file_name):
176 Get load offset, physical offset, file size
177 from bl31 elf file program headers.
179 with open(bl31_file_name) as bl31_file:
180 bl31 = ELFFile(bl31_file)
182 num = bl31.num_segments()
183 print('Number of Segments : %d' % bl31.num_segments())
185 print('Segment %d' % i)
186 seg = bl31.get_segment(i)
187 ptype = seg[ELF_SEG_P_TYPE]
188 poffset = seg[ELF_SEG_P_OFFSET]
189 pmemsz = seg[ELF_SEG_P_MEMSZ]
190 pfilesz = seg[ELF_SEG_P_FILESZ]
191 print('type: %s\nfilesz: %08x\nmemsz: %08x\noffset: %08x' % (ptype, pfilesz, pmemsz, poffset))
192 paddr = seg[ELF_SEG_P_PADDR]
193 print('paddr: %08x' % paddr)
197 bl31_elf="./bl31.elf"
200 opts, args = getopt.getopt(sys.argv[1:], "o:u:b:h")
201 for opt, val in opts:
213 #get_bl31_segments_info("u-boot")
214 #get_bl31_segments_info("bl31.elf")
216 generate_atf_fit_dts(FIT_ITS, bl31_elf, uboot_elf, dtbs)
217 generate_atf_binary(bl31_elf);
219 if __name__ == "__main__":