61 lines
1.9 KiB
Python
61 lines
1.9 KiB
Python
# Autogen'ed file, don't edit. See stm32/sigheader.h for original
|
|
|
|
# (c) Copyright 2018 by Coinkite Inc. This file is covered by license found in COPYING-CC.
|
|
|
|
# Our simple firmware header.
|
|
# Although called a header, this data is placed into the middle of the binary.
|
|
# It is located at start of firmware + 16k - sizeof(heaer). This is a gap unused in normal
|
|
# micropython layout. Exactly the last 64 bytes (signature) should be left out of
|
|
# the checksum. We do checksum areas beyond the end of the last byte of firmware (up to length)
|
|
# and expect those regions to be unprogrammed flash (ones).
|
|
# - timestamp must increase with each upgrade (downgrade protection)
|
|
# - version_string is for humans only
|
|
# - pubkey_num indicates which pubkey was used for signature
|
|
# - firmware_length, must be:
|
|
# - bigger than minimum length, less than max
|
|
# - 512-byte aligned
|
|
# - bootloader assumes the flash filesystem (FAT FS) follows the firmware.
|
|
# - this C header file is somewhat parsed and used by python signature-adding code
|
|
# - timestamp is YYMMDDHHMMSS0000 in BCD
|
|
|
|
|
|
FW_HEADER_SIZE = 128
|
|
FW_HEADER_OFFSET = (0x4000-FW_HEADER_SIZE)
|
|
|
|
FW_HEADER_MAGIC = 0xCC001234
|
|
|
|
# Firmware Image Size
|
|
|
|
# arbitrary min size
|
|
FW_MIN_LENGTH = (256*1024)
|
|
|
|
# (mk1-3) absolute max size: 1MB flash - 32k for bootloader = 1,015,808
|
|
# - but practical limit for our-protocol USB upgrades: 786432 (or else settings damaged)
|
|
FW_MAX_LENGTH = (0x100000 - 0x8000)
|
|
|
|
# .. for Mk4: 2Mbytes, less bootrom of 128k.
|
|
FW_MAX_LENGTH_MK4 = (0x200000 - 0x20000)
|
|
|
|
# Arguments to be used w/ python's struct module.
|
|
FWH_PY_FORMAT = "<I8s8sIIII8s20s64s"
|
|
FWH_PY_VALUES = "magic_value timestamp version_string pubkey_num firmware_length install_flags hw_compat best_ts future signature"
|
|
FWH_NUM_FUTURE = 7
|
|
|
|
# offset of pubkey number
|
|
FWH_PK_NUM_OFFSET = 20
|
|
|
|
# Bits in install_flags
|
|
FWHIF_HIGH_WATER = 0x01
|
|
FWHIF_BEST_TS = 0x02
|
|
|
|
# Bits in hw_compat
|
|
MK_1_OK = 0x01
|
|
MK_2_OK = 0x02
|
|
MK_3_OK = 0x04
|
|
MK_4_OK = 0x08
|
|
MK_Q1_OK = 0x10
|
|
MK_5_OK = 0x20
|
|
|
|
|
|
# EOF
|