Merge tag 'dm-pull-17dec21' of https://source.denx.de/u-boot/custodians/u-boot-dm into next

binman support for ATF FIP
fdtgrep fixes for empty devicetree

1 files changed, 653 insertions, 0 deletions

diff --git a/tools/binman/fip_util.py b/tools/binman/fip_util.py
new file mode 100755
index 0000000000..5f7dbc04d5
--- /dev/null
+++ b/tools/binman/fip_util.py
@@ -0,0 +1,653 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright 2021 Google LLC
+# Written by Simon Glass <sjg@chromium.org>
+
+"""Support for ARM's Firmware Image Package (FIP) format
+
+FIP is a format similar to FMAP[1] but with fewer features and an obscure UUID
+instead of the region name.
+
+It consists of a header and a table of entries, each pointing to a place in the
+firmware image where something can be found.
+
+[1] https://chromium.googlesource.com/chromiumos/third_party/flashmap/+/refs/heads/master/lib/fmap.h
+
+If ATF updates, run this program to update the FIT_TYPE_LIST.
+
+ARM Trusted Firmware is available at:
+
+https://github.com/ARM-software/arm-trusted-firmware.git
+"""
+
+from argparse import ArgumentParser
+import collections
+import io
+import os
+import re
+import struct
+import sys
+from uuid import UUID
+
+OUR_FILE = os.path.realpath(__file__)
+OUR_PATH = os.path.dirname(OUR_FILE)
+
+# Bring in the patman and dtoc libraries (but don't override the first path
+# in PYTHONPATH)
+sys.path.insert(2, os.path.join(OUR_PATH, '..'))
+
+# pylint: disable=C0413
+from patman import command
+from patman import tools
+
+# The TOC header, at the start of the FIP
+HEADER_FORMAT = '<IIQ'
+HEADER_LEN = 0x10
+HEADER_MAGIC = 0xaA640001
+HEADER_SERIAL = 0x12345678
+
+# The entry header (a table of these comes after the TOC header)
+UUID_LEN = 16
+ENTRY_FORMAT = f'<{UUID_LEN}sQQQ'
+ENTRY_SIZE = 0x28
+
+HEADER_NAMES = (
+    'name',
+    'serial',
+    'flags',
+)
+
+ENTRY_NAMES = (
+    'uuid',
+    'offset',
+    'size',
+    'flags',
+)
+
+# Set to True to enable output from running fiptool for debugging
+VERBOSE = False
+
+# Use a class so we can convert the bytes, making the table more readable
+# pylint: disable=R0903
+class FipType:
+    """A FIP entry type that we understand"""
+    def __init__(self, name, desc, uuid_bytes):
+        """Create up a new type
+
+        Args:
+            name (str): Short name for the type
+            desc (str): Longer description for the type
+            uuid_bytes (bytes): List of 16 bytes for the UUID
+        """
+        self.name = name
+        self.desc = desc
+        self.uuid = bytes(uuid_bytes)
+
+# This is taken from tbbr_config.c in ARM Trusted Firmware
+FIP_TYPE_LIST = [
+    # ToC Entry UUIDs
+    FipType('scp-fwu-cfg', 'SCP Firmware Updater Configuration FWU SCP_BL2U',
+            [0x65, 0x92, 0x27, 0x03, 0x2f, 0x74, 0xe6, 0x44,
+             0x8d, 0xff, 0x57, 0x9a, 0xc1, 0xff, 0x06, 0x10]),
+    FipType('ap-fwu-cfg', 'AP Firmware Updater Configuration BL2U',
+            [0x60, 0xb3, 0xeb, 0x37, 0xc1, 0xe5, 0xea, 0x41,
+             0x9d, 0xf3, 0x19, 0xed, 0xa1, 0x1f, 0x68, 0x01]),
+    FipType('fwu', 'Firmware Updater NS_BL2U',
+            [0x4f, 0x51, 0x1d, 0x11, 0x2b, 0xe5, 0x4e, 0x49,
+             0xb4, 0xc5, 0x83, 0xc2, 0xf7, 0x15, 0x84, 0x0a]),
+    FipType('fwu-cert', 'Non-Trusted Firmware Updater certificate',
+            [0x71, 0x40, 0x8a, 0xb2, 0x18, 0xd6, 0x87, 0x4c,
+             0x8b, 0x2e, 0xc6, 0xdc, 0xcd, 0x50, 0xf0, 0x96]),
+    FipType('tb-fw', 'Trusted Boot Firmware BL2',
+            [0x5f, 0xf9, 0xec, 0x0b, 0x4d, 0x22, 0x3e, 0x4d,
+             0xa5, 0x44, 0xc3, 0x9d, 0x81, 0xc7, 0x3f, 0x0a]),
+    FipType('scp-fw', 'SCP Firmware SCP_BL2',
+            [0x97, 0x66, 0xfd, 0x3d, 0x89, 0xbe, 0xe8, 0x49,
+             0xae, 0x5d, 0x78, 0xa1, 0x40, 0x60, 0x82, 0x13]),
+    FipType('soc-fw', 'EL3 Runtime Firmware BL31',
+            [0x47, 0xd4, 0x08, 0x6d, 0x4c, 0xfe, 0x98, 0x46,
+             0x9b, 0x95, 0x29, 0x50, 0xcb, 0xbd, 0x5a, 0x00]),
+    FipType('tos-fw', 'Secure Payload BL32 (Trusted OS)',
+            [0x05, 0xd0, 0xe1, 0x89, 0x53, 0xdc, 0x13, 0x47,
+             0x8d, 0x2b, 0x50, 0x0a, 0x4b, 0x7a, 0x3e, 0x38]),
+    FipType('tos-fw-extra1', 'Secure Payload BL32 Extra1 (Trusted OS Extra1)',
+            [0x0b, 0x70, 0xc2, 0x9b, 0x2a, 0x5a, 0x78, 0x40,
+             0x9f, 0x65, 0x0a, 0x56, 0x82, 0x73, 0x82, 0x88]),
+    FipType('tos-fw-extra2', 'Secure Payload BL32 Extra2 (Trusted OS Extra2)',
+            [0x8e, 0xa8, 0x7b, 0xb1, 0xcf, 0xa2, 0x3f, 0x4d,
+             0x85, 0xfd, 0xe7, 0xbb, 0xa5, 0x02, 0x20, 0xd9]),
+    FipType('nt-fw', 'Non-Trusted Firmware BL33',
+            [0xd6, 0xd0, 0xee, 0xa7, 0xfc, 0xea, 0xd5, 0x4b,
+             0x97, 0x82, 0x99, 0x34, 0xf2, 0x34, 0xb6, 0xe4]),
+    FipType('rmm-fw', 'Realm Monitor Management Firmware',
+            [0x6c, 0x07, 0x62, 0xa6, 0x12, 0xf2, 0x4b, 0x56,
+             0x92, 0xcb, 0xba, 0x8f, 0x63, 0x36, 0x06, 0xd9]),
+    # Key certificates
+    FipType('rot-cert', 'Root Of Trust key certificate',
+            [0x86, 0x2d, 0x1d, 0x72, 0xf8, 0x60, 0xe4, 0x11,
+             0x92, 0x0b, 0x8b, 0xe7, 0x62, 0x16, 0x0f, 0x24]),
+    FipType('trusted-key-cert', 'Trusted key certificate',
+            [0x82, 0x7e, 0xe8, 0x90, 0xf8, 0x60, 0xe4, 0x11,
+             0xa1, 0xb4, 0x77, 0x7a, 0x21, 0xb4, 0xf9, 0x4c]),
+    FipType('scp-fw-key-cert', 'SCP Firmware key certificate',
+            [0x02, 0x42, 0x21, 0xa1, 0xf8, 0x60, 0xe4, 0x11,
+             0x8d, 0x9b, 0xf3, 0x3c, 0x0e, 0x15, 0xa0, 0x14]),
+    FipType('soc-fw-key-cert', 'SoC Firmware key certificate',
+            [0x8a, 0xb8, 0xbe, 0xcc, 0xf9, 0x60, 0xe4, 0x11,
+             0x9a, 0xd0, 0xeb, 0x48, 0x22, 0xd8, 0xdc, 0xf8]),
+    FipType('tos-fw-key-cert', 'Trusted OS Firmware key certificate',
+            [0x94, 0x77, 0xd6, 0x03, 0xfb, 0x60, 0xe4, 0x11,
+             0x85, 0xdd, 0xb7, 0x10, 0x5b, 0x8c, 0xee, 0x04]),
+    FipType('nt-fw-key-cert', 'Non-Trusted Firmware key certificate',
+            [0x8a, 0xd5, 0x83, 0x2a, 0xfb, 0x60, 0xe4, 0x11,
+             0x8a, 0xaf, 0xdf, 0x30, 0xbb, 0xc4, 0x98, 0x59]),
+    # Content certificates
+    FipType('tb-fw-cert', 'Trusted Boot Firmware BL2 certificate',
+            [0xd6, 0xe2, 0x69, 0xea, 0x5d, 0x63, 0xe4, 0x11,
+             0x8d, 0x8c, 0x9f, 0xba, 0xbe, 0x99, 0x56, 0xa5]),
+    FipType('scp-fw-cert', 'SCP Firmware content certificate',
+            [0x44, 0xbe, 0x6f, 0x04, 0x5e, 0x63, 0xe4, 0x11,
+             0xb2, 0x8b, 0x73, 0xd8, 0xea, 0xae, 0x96, 0x56]),
+    FipType('soc-fw-cert', 'SoC Firmware content certificate',
+            [0xe2, 0xb2, 0x0c, 0x20, 0x5e, 0x63, 0xe4, 0x11,
+             0x9c, 0xe8, 0xab, 0xcc, 0xf9, 0x2b, 0xb6, 0x66]),
+    FipType('tos-fw-cert', 'Trusted OS Firmware content certificate',
+            [0xa4, 0x9f, 0x44, 0x11, 0x5e, 0x63, 0xe4, 0x11,
+             0x87, 0x28, 0x3f, 0x05, 0x72, 0x2a, 0xf3, 0x3d]),
+    FipType('nt-fw-cert', 'Non-Trusted Firmware content certificate',
+            [0x8e, 0xc4, 0xc1, 0xf3, 0x5d, 0x63, 0xe4, 0x11,
+             0xa7, 0xa9, 0x87, 0xee, 0x40, 0xb2, 0x3f, 0xa7]),
+    FipType('sip-sp-cert', 'SiP owned Secure Partition content certificate',
+            [0x77, 0x6d, 0xfd, 0x44, 0x86, 0x97, 0x4c, 0x3b,
+             0x91, 0xeb, 0xc1, 0x3e, 0x02, 0x5a, 0x2a, 0x6f]),
+    FipType('plat-sp-cert', 'Platform owned Secure Partition content certificate',
+            [0xdd, 0xcb, 0xbf, 0x4a, 0xca, 0xd6, 0x11, 0xea,
+             0x87, 0xd0, 0x02, 0x42, 0xac, 0x13, 0x00, 0x03]),
+    # Dynamic configs
+    FipType('hw-config', 'HW_CONFIG',
+            [0x08, 0xb8, 0xf1, 0xd9, 0xc9, 0xcf, 0x93, 0x49,
+             0xa9, 0x62, 0x6f, 0xbc, 0x6b, 0x72, 0x65, 0xcc]),
+    FipType('tb-fw-config', 'TB_FW_CONFIG',
+            [0x6c, 0x04, 0x58, 0xff, 0xaf, 0x6b, 0x7d, 0x4f,
+             0x82, 0xed, 0xaa, 0x27, 0xbc, 0x69, 0xbf, 0xd2]),
+    FipType('soc-fw-config', 'SOC_FW_CONFIG',
+            [0x99, 0x79, 0x81, 0x4b, 0x03, 0x76, 0xfb, 0x46,
+             0x8c, 0x8e, 0x8d, 0x26, 0x7f, 0x78, 0x59, 0xe0]),
+    FipType('tos-fw-config', 'TOS_FW_CONFIG',
+            [0x26, 0x25, 0x7c, 0x1a, 0xdb, 0xc6, 0x7f, 0x47,
+             0x8d, 0x96, 0xc4, 0xc4, 0xb0, 0x24, 0x80, 0x21]),
+    FipType('nt-fw-config', 'NT_FW_CONFIG',
+            [0x28, 0xda, 0x98, 0x15, 0x93, 0xe8, 0x7e, 0x44,
+             0xac, 0x66, 0x1a, 0xaf, 0x80, 0x15, 0x50, 0xf9]),
+    FipType('fw-config', 'FW_CONFIG',
+            [0x58, 0x07, 0xe1, 0x6a, 0x84, 0x59, 0x47, 0xbe,
+             0x8e, 0xd5, 0x64, 0x8e, 0x8d, 0xdd, 0xab, 0x0e]),
+    ] # end
+
+FIP_TYPES = {ftype.name: ftype for ftype in FIP_TYPE_LIST}
+
+
+def get_type_uuid(fip_type_or_uuid):
+    """get_type_uuid() - Convert a type or uuid into both
+
+    This always returns a UUID, but may not return a type since it does not do
+    the reverse lookup.
+
+    Args:
+        fip_type_or_uuid (str or bytes): Either a string containing the name of
+            an entry (e.g. 'soc-fw') or a bytes(16) containing the UUID
+
+    Returns:
+        tuple:
+            str: fip type (None if not known)
+            bytes(16): uuid
+
+    Raises:
+        ValueError: An unknown type was requested
+    """
+    if isinstance(fip_type_or_uuid, str):
+        fip_type = fip_type_or_uuid
+        lookup = FIP_TYPES.get(fip_type)
+        if not lookup:
+            raise ValueError(f"Unknown FIP entry type '{fip_type}'")
+        uuid = lookup.uuid
+    else:
+        fip_type = None
+        uuid = fip_type_or_uuid
+    return fip_type, uuid
+
+
+# pylint: disable=R0903
+class FipHeader:
+    """Class to represent a FIP header"""
+    def __init__(self, name, serial, flags):
+        """Set up a new header object
+
+        Args:
+            name (str): Name, i.e. HEADER_MAGIC
+            serial (str): Serial value, i.e. HEADER_SERIAL
+            flags (int64): Flags value
+        """
+        self.name = name
+        self.serial = serial
+        self.flags = flags
+
+
+# pylint: disable=R0903
+class FipEntry:
+    """Class to represent a single FIP entry
+
+    This is used to hold the information about an entry, including its contents.
+    Use the get_data() method to obtain the raw output for writing to the FIP
+    file.
+    """
+    def __init__(self, uuid, offset, size, flags):
+        self.uuid = uuid
+        self.offset = offset
+        self.size = size
+        self.flags = flags
+        self.fip_type = None
+        self.data = None
+        self.valid = uuid != tools.GetBytes(0, UUID_LEN)
+        if self.valid:
+            # Look up the friendly name
+            matches = {val for (key, val) in FIP_TYPES.items()
+                       if val.uuid == uuid}
+            if len(matches) == 1:
+                self.fip_type = matches.pop().name
+
+    @classmethod
+    def from_type(cls, fip_type_or_uuid, data, flags):
+        """Create a FipEntry from a type name
+
+        Args:
+            cls (class): This class
+            fip_type_or_uuid (str or bytes): Name of the type to create, or
+                bytes(16) uuid
+            data (bytes): Contents of entry
+            flags (int64): Flags value
+
+        Returns:
+            FipEntry: Created 241
+        """
+        fip_type, uuid = get_type_uuid(fip_type_or_uuid)
+        fent = FipEntry(uuid, None, len(data), flags)
+        fent.fip_type = fip_type
+        fent.data = data
+        return fent
+
+
+def decode_fip(data):
+    """Decode a FIP into a header and list of FIP entries
+
+    Args:
+        data (bytes): Data block containing the FMAP
+
+    Returns:
+        Tuple:
+            header: FipHeader object
+            List of FipArea objects
+    """
+    fields = list(struct.unpack(HEADER_FORMAT, data[:HEADER_LEN]))
+    header = FipHeader(*fields)
+    fents = []
+    pos = HEADER_LEN
+    while True:
+        fields = list(struct.unpack(ENTRY_FORMAT, data[pos:pos + ENTRY_SIZE]))
+        fent = FipEntry(*fields)
+        if not fent.valid:
+            break
+        fent.data = data[fent.offset:fent.offset + fent.size]
+        fents.append(fent)
+        pos += ENTRY_SIZE
+    return header, fents
+
+
+class FipWriter:
+    """Class to handle writing a ARM Trusted Firmware's Firmware Image Package
+
+    Usage is something like:
+
+        fip = FipWriter(size)
+        fip.add_entry('scp-fwu-cfg', tools.ReadFile('something.bin'))
+        ...
+        data = cbw.get_data()
+
+    Attributes:
+    """
+    def __init__(self, flags, align):
+        self._fip_entries = []
+        self._flags = flags
+        self._align = align
+
+    def add_entry(self, fip_type, data, flags):
+        """Add a new entry to the FIP
+
+        Args:
+            fip_type (str): Type to add, e.g. 'tos-fw-config'
+            data (bytes): Contents of entry
+            flags (int64): Entry flags
+
+        Returns:
+            FipEntry: entry that was added
+        """
+        fent = FipEntry.from_type(fip_type, data, flags)
+        self._fip_entries.append(fent)
+        return fent
+
+    def get_data(self):
+        """Obtain the full contents of the FIP
+
+        Thhis builds the FIP with headers and all required FIP entries.
+
+        Returns:
+            bytes: data resulting from building the FIP
+        """
+        buf = io.BytesIO()
+        hdr = struct.pack(HEADER_FORMAT, HEADER_MAGIC, HEADER_SERIAL,
+                          self._flags)
+        buf.write(hdr)
+
+        # Calculate the position fo the first entry
+        offset = len(hdr)
+        offset += len(self._fip_entries) * ENTRY_SIZE
+        offset += ENTRY_SIZE   # terminating entry
+
+        for fent in self._fip_entries:
+            offset = tools.Align(offset, self._align)
+            fent.offset = offset
+            offset += fent.size
+
+        # Write out the TOC
+        for fent in self._fip_entries:
+            hdr = struct.pack(ENTRY_FORMAT, fent.uuid, fent.offset, fent.size,
+                              fent.flags)
+            buf.write(hdr)
+
+        # Write out the entries
+        for fent in self._fip_entries:
+            buf.seek(fent.offset)
+            buf.write(fent.data)
+
+        return buf.getvalue()
+
+
+class FipReader():
+    """Class to handle reading a Firmware Image Package (FIP)
+
+    Usage is something like:
+        fip = fip_util.FipReader(data)
+        fent = fip.get_entry('fwu')
+        self.WriteFile('ufwu.bin', fent.data)
+        blob = fip.get_entry(
+            bytes([0xe3, 0xb7, 0x8d, 0x9e, 0x4a, 0x64, 0x11, 0xec,
+                   0xb4, 0x5c, 0xfb, 0xa2, 0xb9, 0xb4, 0x97, 0x88]))
+        self.WriteFile('blob.bin', blob.data)
+    """
+    def __init__(self, data, read=True):
+        """Set up a new FitReader
+
+        Args:
+            data (bytes): data to read
+            read (bool): True to read the data now
+        """
+        self.fents = collections.OrderedDict()
+        self.data = data
+        if read:
+            self.read()
+
+    def read(self):
+        """Read all the files in the FIP and add them to self.files"""
+        self.header, self.fents = decode_fip(self.data)
+
+    def get_entry(self, fip_type_or_uuid):
+        """get_entry() - Find an entry by type or UUID
+
+        Args:
+            fip_type_or_uuid (str or bytes): Name of the type to create, or
+                    bytes(16) uuid
+
+        Returns:
+            FipEntry: if found
+
+        Raises:
+            ValueError: entry type not found
+        """
+        fip_type, uuid = get_type_uuid(fip_type_or_uuid)
+        for fent in self.fents:
+            if fent.uuid == uuid:
+                return fent
+        label = fip_type
+        if not label:
+            label = UUID(bytes=uuid)
+        raise ValueError(f"Cannot find FIP entry '{label}'")
+
+
+def parse_macros(srcdir):
+    """parse_macros: Parse the firmware_image_package.h file
+
+    Args:
+        srcdir (str): 'arm-trusted-firmware' source directory
+
+    Returns:
+        dict:
+            key: UUID macro name, e.g. 'UUID_TRUSTED_FWU_CERT'
+            value: list:
+                file comment, e.g. 'ToC Entry UUIDs'
+                macro name, e.g. 'UUID_TRUSTED_FWU_CERT'
+                uuid as bytes(16)
+
+    Raises:
+        ValueError: a line cannot be parsed
+    """
+    re_uuid = re.compile('0x[0-9a-fA-F]{2}')
+    re_comment = re.compile(r'^/\* (.*) \*/$')
+    fname = os.path.join(srcdir, 'include/tools_share/firmware_image_package.h')
+    data = tools.ReadFile(fname, binary=False)
+    macros = collections.OrderedDict()
+    comment = None
+    for linenum, line in enumerate(data.splitlines()):
+        if line.startswith('/*'):
+            mat = re_comment.match(line)
+            if mat:
+                comment = mat.group(1)
+        else:
+            # Example: #define UUID_TOS_FW_CONFIG \
+            if 'UUID' in line:
+                macro = line.split()[1]
+            elif '{{' in line:
+                mat = re_uuid.findall(line)
+                if not mat or len(mat) != 16:
+                    raise ValueError(
+                        f'{fname}: Cannot parse UUID line {linenum + 1}: Got matches: {mat}')
+
+                uuid = bytes([int(val, 16) for val in mat])
+                macros[macro] = comment, macro, uuid
+    if not macros:
+        raise ValueError(f'{fname}: Cannot parse file')
+    return macros
+
+
+def parse_names(srcdir):
+    """parse_names: Parse the tbbr_config.c file
+
+    Args:
+        srcdir (str): 'arm-trusted-firmware' source directory
+
+    Returns:
+        tuple: dict of entries:
+            key: UUID macro, e.g. 'UUID_NON_TRUSTED_FIRMWARE_BL33'
+            tuple: entry information
+                Description of entry, e.g. 'Non-Trusted Firmware BL33'
+                UUID macro, e.g. 'UUID_NON_TRUSTED_FIRMWARE_BL33'
+                Name of entry, e.g. 'nt-fw'
+
+    Raises:
+        ValueError: the file cannot be parsed
+    """
+    # Extract the .name, .uuid and .cmdline_name values
+    re_data = re.compile(r'\.name = "([^"]*)",\s*\.uuid = (UUID_\w*),\s*\.cmdline_name = "([^"]+)"',
+                         re.S)
+    fname = os.path.join(srcdir, 'tools/fiptool/tbbr_config.c')
+    data = tools.ReadFile(fname, binary=False)
+
+    # Example entry:
+    #   {
+    #       .name = "Secure Payload BL32 Extra2 (Trusted OS Extra2)",
+    #       .uuid = UUID_SECURE_PAYLOAD_BL32_EXTRA2,
+    #       .cmdline_name = "tos-fw-extra2"
+    #   },
+    mat = re_data.findall(data)
+    if not mat:
+        raise ValueError(f'{fname}: Cannot parse file')
+    names = {uuid: (desc, uuid, name) for desc, uuid, name in mat}
+    return names
+
+
+def create_code_output(macros, names):
+    """create_code_output() - Create the new version of this Python file
+
+    Args:
+        macros (dict):
+            key (str): UUID macro name, e.g. 'UUID_TRUSTED_FWU_CERT'
+            value: list:
+                file comment, e.g. 'ToC Entry UUIDs'
+                macro name, e.g. 'UUID_TRUSTED_FWU_CERT'
+                uuid as bytes(16)
+
+        names (dict): list of entries, each
+            tuple: entry information
+                Description of entry, e.g. 'Non-Trusted Firmware BL33'
+                UUID macro, e.g. 'UUID_NON_TRUSTED_FIRMWARE_BL33'
+                Name of entry, e.g. 'nt-fw'
+
+    Returns:
+        str: Table of FipType() entries
+    """
+    def _to_hex_list(data):
+        """Convert bytes into C code
+
+        Args:
+            bytes to convert
+
+        Returns:
+            str: in the format '0x12, 0x34, 0x56...'
+        """
+        # Use 0x instead of %# since the latter ignores the 0 modifier in
+        # Python 3.8.10
+        return ', '.join(['0x%02x' % byte for byte in data])
+
+    out = ''
+    last_comment = None
+    for comment, macro, uuid in macros.values():
+        name_entry = names.get(macro)
+        if not name_entry:
+            print(f"Warning: UUID '{macro}' is not mentioned in tbbr_config.c file")
+            continue
+        desc, _, name = name_entry
+        if last_comment != comment:
+            out += f'    # {comment}\n'
+            last_comment = comment
+        out += """    FipType('%s', '%s',
+            [%s,
+             %s]),
+""" % (name, desc, _to_hex_list(uuid[:8]), _to_hex_list(uuid[8:]))
+    return out
+
+
+def parse_atf_source(srcdir, dstfile, oldfile):
+    """parse_atf_source(): Parse the ATF source tree and update this file
+
+    Args:
+        srcdir (str): Path to 'arm-trusted-firmware' directory. Get this from:
+            https://github.com/ARM-software/arm-trusted-firmware.git
+        dstfile (str): File to write new code to, if an update is needed
+        oldfile (str): Python source file to compare against
+
+    Raises:
+        ValueError: srcdir readme.rst is missing or the first line does not
+            match what is expected
+    """
+    # We expect a readme file
+    readme_fname = os.path.join(srcdir, 'readme.rst')
+    if not os.path.exists(readme_fname):
+        raise ValueError(
+            f"Expected file '{readme_fname}' - try using -s to specify the "
+            'arm-trusted-firmware directory')
+    readme = tools.ReadFile(readme_fname, binary=False)
+    first_line = 'Trusted Firmware-A'
+    if readme.splitlines()[0] != first_line:
+        raise ValueError(f"'{readme_fname}' does not start with '{first_line}'")
+    macros = parse_macros(srcdir)
+    names = parse_names(srcdir)
+    output = create_code_output(macros, names)
+    orig = tools.ReadFile(oldfile, binary=False)
+    re_fip_list = re.compile(r'(.*FIP_TYPE_LIST = \[).*?(    ] # end.*)', re.S)
+    mat = re_fip_list.match(orig)
+    new_code = mat.group(1) + '\n' + output + mat.group(2) if mat else output
+    if new_code == orig:
+        print(f"Existing code in '{oldfile}' is up-to-date")
+    else:
+        tools.WriteFile(dstfile, new_code, binary=False)
+        print(f'Needs update, try:\n\tmeld {dstfile} {oldfile}')
+
+
+def main(argv, oldfile):
+    """Main program for this tool
+
+    Args:
+        argv (list): List of str command-line arguments
+        oldfile (str): Python source file to compare against
+
+    Returns:
+        int: 0 (exit code)
+    """
+    parser = ArgumentParser(epilog='''Creates an updated version of this code,
+with a table of FIP-entry types parsed from the arm-trusted-firmware source
+directory''')
+    parser.add_argument(
+        '-D', '--debug', action='store_true',
+        help='Enabling debugging (provides a full traceback on error)')
+    parser.add_argument(
+        '-o', '--outfile', type=str, default='fip_util.py.out',
+        help='Output file to write new fip_util.py file to')
+    parser.add_argument(
+        '-s', '--src', type=str, default='.',
+        help='Directory containing the arm-trusted-firmware source')
+    args = parser.parse_args(argv)
+
+    if not args.debug:
+        sys.tracebacklimit = 0
+
+    parse_atf_source(args.src, args.outfile, oldfile)
+    return 0
+
+
+def fiptool(fname, *fip_args):
+    """Run fiptool with provided arguments
+
+    If the tool fails then this function raises an exception and prints out the
+    output and stderr.
+
+    Args:
+        fname (str): Filename of FIP
+        *fip_args: List of arguments to pass to fiptool
+
+    Returns:
+        CommandResult: object containing the results
+
+    Raises:
+        ValueError: the tool failed to run
+    """
+    args = ['fiptool', fname] + list(fip_args)
+    result = command.RunPipe([args], capture=not VERBOSE,
+                             capture_stderr=not VERBOSE, raise_on_error=False)
+    if result.return_code:
+        print(result.stderr, file=sys.stderr)
+        raise ValueError("Failed to run (error %d): '%s'" %
+                         (result.return_code, ' '.join(args)))
+    return result
+
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv[1:], OUR_FILE))  # pragma: no cover