103 lines
2.8 KiB
Python
Executable File
103 lines
2.8 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
#
|
|
# SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
import os
|
|
import struct
|
|
import sys
|
|
|
|
PROG_NAME = os.path.basename(sys.argv[0])
|
|
|
|
def create_header(base, size):
|
|
"""Returns a packed MBN header image with the specified base and size.
|
|
|
|
@arg base: integer, specifies the image load address in RAM
|
|
@arg size: integer, specifies the size of the image
|
|
@returns: string, the MBN header
|
|
"""
|
|
|
|
# SBLs require size to be 4 bytes aligned.
|
|
size = (size + 3) & 0xfffffffc
|
|
|
|
# We currently do not support appending certificates. Signing GPL
|
|
# code might violate the GPL. So U-Boot will never be signed. So
|
|
# this is not required for U-Boot.
|
|
|
|
header = [
|
|
0x5, # Type: APPSBL
|
|
0x3, # Version: 3
|
|
0x0, # Image source pointer
|
|
base, # Image destination pointer
|
|
size, # Code Size + Cert Size + Signature Size
|
|
size, # Code Size
|
|
base + size, # Destination + Code Size
|
|
0x0, # Signature Size
|
|
base + size, # Destination + Code Size + Signature Size
|
|
0x0, # Cert Size
|
|
]
|
|
|
|
header_packed = struct.pack('<10I', *header)
|
|
return header_packed
|
|
|
|
def mkheader(base_addr, infname, outfname):
|
|
"""Prepends the image with the MBN header.
|
|
|
|
@arg base_addr: integer, specifies the image load address in RAM
|
|
@arg infname: string, image filename
|
|
@arg outfname: string, output image with header prepended
|
|
@raises IOError: if reading/writing input/output file fails
|
|
"""
|
|
with open(infname, "rb") as infp:
|
|
image = infp.read()
|
|
insize = len(image)
|
|
|
|
if base_addr > 0xFFFFFFFF:
|
|
raise ValueError("invalid base address")
|
|
|
|
if base_addr + insize > 0xFFFFFFFF:
|
|
raise ValueError("invalid destination range")
|
|
|
|
header = create_header(base_addr, insize)
|
|
with open(outfname, "wb") as outfp:
|
|
outfp.write(header)
|
|
outfp.write(image)
|
|
|
|
def usage(msg=None):
|
|
"""Print command usage.
|
|
|
|
@arg msg: string, error message if any (default: None)
|
|
"""
|
|
if msg != None:
|
|
sys.stderr.write("%s: %s\n" % (PROG_NAME, msg))
|
|
|
|
print("Usage: %s <base-addr> <input-file> <output-file>" % PROG_NAME)
|
|
|
|
if msg != None:
|
|
exit(1)
|
|
|
|
def main():
|
|
"""Main entry function"""
|
|
|
|
if len(sys.argv) != 4:
|
|
usage("incorrect number of arguments")
|
|
|
|
try:
|
|
base_addr = int(sys.argv[1], 0)
|
|
infname = sys.argv[2]
|
|
outfname = sys.argv[3]
|
|
except ValueError as e:
|
|
sys.stderr.write("mkheader: invalid base address '%s'\n" % sys.argv[1])
|
|
exit(1)
|
|
|
|
try:
|
|
mkheader(base_addr, infname, outfname)
|
|
except IOError as e:
|
|
sys.stderr.write("%s: %s\n" % (PROG_NAME, e))
|
|
exit(1)
|
|
except ValueError as e:
|
|
sys.stderr.write("%s: %s\n" % (PROG_NAME, e))
|
|
exit(1)
|
|
|
|
if __name__ == "__main__":
|
|
main()
|