Nicolas Borla / Mbed OS BBR_1Ebene

BBR 1 Ebene

mbed-os/tools/targets/REALTEK_RTL8195AM.py@0:fbdae7e6d805, 2018-05-14 (annotated)

Committer:
borlanic
Date:
Mon May 14 11:29:06 2018 +0000
Revision:
0:fbdae7e6d805
BBR

Who changed what in which revision?

UserRevisionLine numberNew contents of line
borlanic 0:fbdae7e6d805 1 """
borlanic 0:fbdae7e6d805 2 Realtek Semiconductor Corp.
borlanic 0:fbdae7e6d805 3
borlanic 0:fbdae7e6d805 4 RTL8195A elf2bin script
borlanic 0:fbdae7e6d805 5 """
borlanic 0:fbdae7e6d805 6
borlanic 0:fbdae7e6d805 7 import sys, array, struct, os, re, subprocess
borlanic 0:fbdae7e6d805 8 import hashlib
borlanic 0:fbdae7e6d805 9 import shutil
borlanic 0:fbdae7e6d805 10 import time
borlanic 0:fbdae7e6d805 11 import binascii
borlanic 0:fbdae7e6d805 12 import elftools
borlanic 0:fbdae7e6d805 13
borlanic 0:fbdae7e6d805 14 from tools.paths import TOOLS_BOOTLOADERS
borlanic 0:fbdae7e6d805 15 from tools.toolchains import TOOLCHAIN_PATHS
borlanic 0:fbdae7e6d805 16
borlanic 0:fbdae7e6d805 17 # Constant Variables
borlanic 0:fbdae7e6d805 18 TAG = 0x81950001
borlanic 0:fbdae7e6d805 19 VER = 0x81950001
borlanic 0:fbdae7e6d805 20 CAMPAIGN = binascii.hexlify('FFFFFFFFFFFFFFFF')
borlanic 0:fbdae7e6d805 21
borlanic 0:fbdae7e6d805 22 RAM2_HEADER = {
borlanic 0:fbdae7e6d805 23 'tag': 0,
borlanic 0:fbdae7e6d805 24 'ver': 0,
borlanic 0:fbdae7e6d805 25 'timestamp': 0,
borlanic 0:fbdae7e6d805 26 'size': 72,
borlanic 0:fbdae7e6d805 27 'hash': 'FF',
borlanic 0:fbdae7e6d805 28 'campaign': 'FF',
borlanic 0:fbdae7e6d805 29 'crc32': 0xFFFFFFFF,
borlanic 0:fbdae7e6d805 30 }
borlanic 0:fbdae7e6d805 31
borlanic 0:fbdae7e6d805 32 def format_number(number, width):
borlanic 0:fbdae7e6d805 33 # convert to string
borlanic 0:fbdae7e6d805 34 line = format(number, '0%dx' % (width))
borlanic 0:fbdae7e6d805 35 if len(line) > width:
borlanic 0:fbdae7e6d805 36 print "[ERROR] 0x%s cannot fit in width %d" % (line, width)
borlanic 0:fbdae7e6d805 37 sys.exit(-1)
borlanic 0:fbdae7e6d805 38 # cut string to list & reverse
borlanic 0:fbdae7e6d805 39 line = [line[i:i+2] for i in range(0, len(line), 2)]
borlanic 0:fbdae7e6d805 40 line.reverse()
borlanic 0:fbdae7e6d805 41 return binascii.a2b_hex("".join(line))
borlanic 0:fbdae7e6d805 42
borlanic 0:fbdae7e6d805 43 def format_string(string):
borlanic 0:fbdae7e6d805 44 return binascii.a2b_hex(string)
borlanic 0:fbdae7e6d805 45
borlanic 0:fbdae7e6d805 46 def write_number(value, width, output):
borlanic 0:fbdae7e6d805 47 output.write(format_number(value, width))
borlanic 0:fbdae7e6d805 48
borlanic 0:fbdae7e6d805 49 def write_string(value, width, output):
borlanic 0:fbdae7e6d805 50 output.write(format_string(value))
borlanic 0:fbdae7e6d805 51
borlanic 0:fbdae7e6d805 52 def append_image_file(image, output):
borlanic 0:fbdae7e6d805 53 input = open(image, "rb")
borlanic 0:fbdae7e6d805 54 output.write(input.read())
borlanic 0:fbdae7e6d805 55 input.close()
borlanic 0:fbdae7e6d805 56
borlanic 0:fbdae7e6d805 57 def write_padding_bytes(output_name, size):
borlanic 0:fbdae7e6d805 58 current_size = os.stat(output_name).st_size
borlanic 0:fbdae7e6d805 59 padcount = size - current_size
borlanic 0:fbdae7e6d805 60 if padcount < 0:
borlanic 0:fbdae7e6d805 61 print "[ERROR] image is larger than expected size"
borlanic 0:fbdae7e6d805 62 sys.exit(-1)
borlanic 0:fbdae7e6d805 63 output = open(output_name, "ab")
borlanic 0:fbdae7e6d805 64 output.write('\377' * padcount)
borlanic 0:fbdae7e6d805 65 output.close()
borlanic 0:fbdae7e6d805 66
borlanic 0:fbdae7e6d805 67 def crc32_checksum(string):
borlanic 0:fbdae7e6d805 68 return binascii.crc32(string) & 0xFFFFFFFF
borlanic 0:fbdae7e6d805 69
borlanic 0:fbdae7e6d805 70 def sha256_checksum(filename, block_size=65536):
borlanic 0:fbdae7e6d805 71 sha256 = hashlib.sha256()
borlanic 0:fbdae7e6d805 72 with open(filename, 'rb') as f:
borlanic 0:fbdae7e6d805 73 for block in iter(lambda: f.read(block_size), b''):
borlanic 0:fbdae7e6d805 74 sha256.update(block)
borlanic 0:fbdae7e6d805 75 return sha256.hexdigest()
borlanic 0:fbdae7e6d805 76
borlanic 0:fbdae7e6d805 77 def epoch_timestamp():
borlanic 0:fbdae7e6d805 78 epoch = int(time.time())
borlanic 0:fbdae7e6d805 79 return epoch
borlanic 0:fbdae7e6d805 80
borlanic 0:fbdae7e6d805 81 def find_symbol(toolchain, mapfile, symbol):
borlanic 0:fbdae7e6d805 82 ret = None
borlanic 0:fbdae7e6d805 83
borlanic 0:fbdae7e6d805 84 HEX = '0x0{,8}(?P<addr>[0-9A-Fa-f]{8})'
borlanic 0:fbdae7e6d805 85 if toolchain == "GCC_ARM":
borlanic 0:fbdae7e6d805 86 SYM = re.compile(r'^\s+' + HEX + r'\s+' + symbol + '\r?$')
borlanic 0:fbdae7e6d805 87 elif toolchain in ["ARM_STD", "ARM", "ARM_MICRO"]:
borlanic 0:fbdae7e6d805 88 SYM = re.compile(r'^\s+' + HEX + r'\s+0x[0-9A-Fa-f]{8}\s+Code.*\s+i\.' + symbol + r'\s+.*$')
borlanic 0:fbdae7e6d805 89 elif toolchain == "IAR":
borlanic 0:fbdae7e6d805 90 SYM = re.compile(r'^' + symbol + r'\s+' + HEX + '\s+.*$')
borlanic 0:fbdae7e6d805 91
borlanic 0:fbdae7e6d805 92 with open(mapfile, 'r') as infile:
borlanic 0:fbdae7e6d805 93 for line in infile:
borlanic 0:fbdae7e6d805 94 match = re.match(SYM, line)
borlanic 0:fbdae7e6d805 95 if match:
borlanic 0:fbdae7e6d805 96 ret = match.group("addr")
borlanic 0:fbdae7e6d805 97
borlanic 0:fbdae7e6d805 98 if not ret:
borlanic 0:fbdae7e6d805 99 print "[ERROR] cannot find the address of symbol " + symbol
borlanic 0:fbdae7e6d805 100 return 0
borlanic 0:fbdae7e6d805 101
borlanic 0:fbdae7e6d805 102 return int(ret,16) | 1
borlanic 0:fbdae7e6d805 103
borlanic 0:fbdae7e6d805 104 def _parse_load_segment_inner(image_elf):
borlanic 0:fbdae7e6d805 105 with open(image_elf, "rb") as fd:
borlanic 0:fbdae7e6d805 106 elffile = elftools.elf.elffile.ELFFile(fd)
borlanic 0:fbdae7e6d805 107 for segment in elffile.iter_segments():
borlanic 0:fbdae7e6d805 108 offset = segment['p_offset']
borlanic 0:fbdae7e6d805 109 addr = segment['p_vaddr']
borlanic 0:fbdae7e6d805 110 size = segment['p_filesz']
borlanic 0:fbdae7e6d805 111 if (addr != 0 and size != 0 and segment['p_type'] == 'PT_LOAD'):
borlanic 0:fbdae7e6d805 112 yield offset, addr, size
borlanic 0:fbdae7e6d805 113
borlanic 0:fbdae7e6d805 114 def parse_load_segment(toolchain, image_elf):
borlanic 0:fbdae7e6d805 115 return list(_parse_load_segment_inner(image_elf))
borlanic 0:fbdae7e6d805 116
borlanic 0:fbdae7e6d805 117 def create_payload(image_elf, ram2_bin, entry, segment):
borlanic 0:fbdae7e6d805 118 file_elf = open(image_elf, "rb")
borlanic 0:fbdae7e6d805 119 file_bin = open(ram2_bin, "wb")
borlanic 0:fbdae7e6d805 120
borlanic 0:fbdae7e6d805 121 write_number(int(entry), 8, file_bin)
borlanic 0:fbdae7e6d805 122 write_number(int(len(segment)), 8, file_bin)
borlanic 0:fbdae7e6d805 123 write_number(0xFFFFFFFF, 8, file_bin)
borlanic 0:fbdae7e6d805 124 write_number(0xFFFFFFFF, 8, file_bin)
borlanic 0:fbdae7e6d805 125
borlanic 0:fbdae7e6d805 126 for (offset, addr, size) in segment:
borlanic 0:fbdae7e6d805 127 file_elf.seek(offset)
borlanic 0:fbdae7e6d805 128 # write image header - size & addr
borlanic 0:fbdae7e6d805 129 write_number(addr, 8, file_bin)
borlanic 0:fbdae7e6d805 130 write_number(size, 8, file_bin)
borlanic 0:fbdae7e6d805 131 # write load segment
borlanic 0:fbdae7e6d805 132 file_bin.write(file_elf.read(size))
borlanic 0:fbdae7e6d805 133 delta = size % 4
borlanic 0:fbdae7e6d805 134 if delta != 0:
borlanic 0:fbdae7e6d805 135 padding = 4 - delta
borlanic 0:fbdae7e6d805 136 write_number(0x0, padding * 2, file_bin)
borlanic 0:fbdae7e6d805 137 file_bin.close()
borlanic 0:fbdae7e6d805 138 file_elf.close()
borlanic 0:fbdae7e6d805 139
borlanic 0:fbdae7e6d805 140 def create_daplink(image_bin, ram1_bin, ram2_bin):
borlanic 0:fbdae7e6d805 141
borlanic 0:fbdae7e6d805 142 # remove target binary file/path
borlanic 0:fbdae7e6d805 143 if os.path.isfile(image_bin):
borlanic 0:fbdae7e6d805 144 os.remove(image_bin)
borlanic 0:fbdae7e6d805 145 else:
borlanic 0:fbdae7e6d805 146 shutil.rmtree(image_bin)
borlanic 0:fbdae7e6d805 147
borlanic 0:fbdae7e6d805 148 RAM2_HEADER['tag'] = format_number(TAG, 8)
borlanic 0:fbdae7e6d805 149 RAM2_HEADER['ver'] = format_number(VER, 8)
borlanic 0:fbdae7e6d805 150 RAM2_HEADER['timestamp'] = format_number(epoch_timestamp(), 16)
borlanic 0:fbdae7e6d805 151 RAM2_HEADER['size'] = format_number(os.stat(ram2_bin).st_size + 72, 8)
borlanic 0:fbdae7e6d805 152 RAM2_HEADER['hash'] = format_string(sha256_checksum(ram2_bin))
borlanic 0:fbdae7e6d805 153 RAM2_HEADER['campaign'] = format_string(CAMPAIGN)
borlanic 0:fbdae7e6d805 154
borlanic 0:fbdae7e6d805 155 output = open(image_bin, "wb")
borlanic 0:fbdae7e6d805 156 append_image_file(ram1_bin, output)
borlanic 0:fbdae7e6d805 157 append_image_file(ram2_bin, output)
borlanic 0:fbdae7e6d805 158
borlanic 0:fbdae7e6d805 159 output.seek(0xb000)
borlanic 0:fbdae7e6d805 160 line = ""
borlanic 0:fbdae7e6d805 161 for key in ['tag', 'ver', 'timestamp', 'size', 'hash', 'campaign']:
borlanic 0:fbdae7e6d805 162 line += RAM2_HEADER[key]
borlanic 0:fbdae7e6d805 163 output.write(RAM2_HEADER[key])
borlanic 0:fbdae7e6d805 164
borlanic 0:fbdae7e6d805 165 RAM2_HEADER['crc32'] = format_number(crc32_checksum(line), 8)
borlanic 0:fbdae7e6d805 166
borlanic 0:fbdae7e6d805 167 output.write(RAM2_HEADER['crc32'])
borlanic 0:fbdae7e6d805 168 output.close()
borlanic 0:fbdae7e6d805 169
borlanic 0:fbdae7e6d805 170 # ----------------------------
borlanic 0:fbdae7e6d805 171 # main function
borlanic 0:fbdae7e6d805 172 # ----------------------------
borlanic 0:fbdae7e6d805 173 def rtl8195a_elf2bin(t_self, image_elf, image_bin):
borlanic 0:fbdae7e6d805 174
borlanic 0:fbdae7e6d805 175 image_name = list(os.path.splitext(image_elf))[:-1]
borlanic 0:fbdae7e6d805 176 image_map = ".".join(image_name + ['map'])
borlanic 0:fbdae7e6d805 177
borlanic 0:fbdae7e6d805 178 ram1_bin = os.path.join(TOOLS_BOOTLOADERS, "REALTEK_RTL8195AM", "ram_1.bin")
borlanic 0:fbdae7e6d805 179 ram2_bin = ".".join(image_name) + '-payload.bin'
borlanic 0:fbdae7e6d805 180
borlanic 0:fbdae7e6d805 181 entry = find_symbol(t_self.name, image_map, "PLAT_Start")
borlanic 0:fbdae7e6d805 182 segment = parse_load_segment(t_self.name, image_elf)
borlanic 0:fbdae7e6d805 183
borlanic 0:fbdae7e6d805 184 create_payload(image_elf, ram2_bin, entry, segment)
borlanic 0:fbdae7e6d805 185 create_daplink(image_bin, ram1_bin, ram2_bin)