93 lines
2.8 KiB
Python
93 lines
2.8 KiB
Python
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#!/usr/bin/env python
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#
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# This file is part of the coreboot project.
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#
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# Copyright (c) 2015 MediaTek Inc.
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# Author: Tristan Shieh <tristan.shieh@mediatek.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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import struct
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import sys
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import hashlib
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def read(path):
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with open(path, "rb") as f:
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return f.read()
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def write(path, data):
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with open(path, "wb") as f:
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f.write(data)
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def padding(data, size, pattern = '\0'):
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return data + pattern * (size - len(data))
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def align(data, size, pattern = '\0'):
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return padding(data, (len(data) + (size - 1)) & ~(size - 1), pattern)
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gfh_infos = {
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'mt8173': struct.pack("44I",
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0x014d4d4d, 0x00000038, 0x454c4946, 0x464e495f,
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0x0000004f, 0x00000001, 0x01050001, 0x000C0f50,
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0xffffffff, 0x00020000, 0x000000a8, 0x00000020,
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0x000000B0, 0x00000001, 0x014d4d4d, 0x0001000c,
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0x00000001, 0x034d4d4d, 0x00070064, 0x00001182,
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0x00000000, 0x00000000, 0x00000000, 0x00000000,
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0x00000000, 0x00000000, 0x00000000, 0x00000000,
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0x00000000, 0x00000000, 0x00000000, 0x00000000,
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0x00000000, 0x00000000, 0x00000000, 0x00000000,
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0x00000000, 0x00000000, 0x00006400, 0x00001388,
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0x00000000, 0x00000000, 0x00000000, 0x00000000,
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)}
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def gen_emmc_header(data):
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header = (padding(struct.pack("<12sII", "EMMC_BOOT", 1, 512), 512, '\xff') +
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padding(struct.pack("<8sIIIIIIII", "BRLYT", 1, 2048, 2048 + len(data),
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0x42424242, 0x00010005, 2048, 2048 + len(data), 1) + '\0' * 140, 512, '\xff') +
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'\0' * 1024)
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return header
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def gen_sf_header(data):
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header = (padding(struct.pack("<12sII", "SF_BOOT", 1, 512), 512, '\xff') +
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padding(struct.pack("<8sIIIIIIII", "BRLYT", 1, 2048, 2048 + len(data),
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0x42424242, 0x00010007, 2048, 2048 + len(data), 1) + '\0' * 140, 512, '\xff') +
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'\0' * 1024)
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return header
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gen_dev_header = {
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"emmc": gen_emmc_header,
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"sf": gen_sf_header
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}
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def gen_preloader(chip_ver, flash_type, data):
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gfh_info = gfh_infos[chip_ver]
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gfh_info = gfh_info[0:32] + struct.pack("1I", len(data)+len(gfh_info)+32) + gfh_info[36:len(gfh_info)]
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gfh_hash = hashlib.sha256(gfh_info + data).digest()
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data = align(gfh_info + data + gfh_hash, 512, '\xff')
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header = gen_dev_header[flash_type](data)
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return header + data
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def main(argv):
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if len(argv) != 5:
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print "Usage: %s <chip> <flash_type> <input_file> <output_file>" % argv[0]
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print "\t flash_type: emmc/sf"
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print "\t chip : mt8173"
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exit(1)
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write(argv[4], gen_preloader(argv[1], argv[2], read(argv[3])))
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if __name__ == "__main__":
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main(sys.argv)
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