1 # SPDX-License-Identifier: GPL-2.0+
2 # Copyright (c) 2016 Google, Inc
4 # Base class for all entries
7 from collections import namedtuple
12 from dtoc import fdt_util
13 from patman import tools
14 from patman.tools import ToHex, ToHexSize
15 from patman import tout
20 # An argument which can be passed to entries on the command line, in lieu of
21 # device-tree properties.
22 EntryArg = namedtuple('EntryArg', ['name', 'datatype'])
24 # Information about an entry for use when displaying summaries
25 EntryInfo = namedtuple('EntryInfo', ['indent', 'name', 'etype', 'size',
26 'image_pos', 'uncomp_size', 'offset',
30 """An Entry in the section
32 An entry corresponds to a single node in the device-tree description
33 of the section. Each entry ends up being a part of the final section.
34 Entries can be placed either right next to each other, or with padding
35 between them. The type of the entry determines the data that is in it.
37 This class is not used by itself. All entry objects are subclasses of
41 section: Section object containing this entry
42 node: The node that created this entry
43 offset: Offset of entry within the section, None if not known yet (in
44 which case it will be calculated by Pack())
45 size: Entry size in bytes, None if not known
46 pre_reset_size: size as it was before ResetForPack(). This allows us to
47 keep track of the size we started with and detect size changes
48 uncomp_size: Size of uncompressed data in bytes, if the entry is
50 contents_size: Size of contents in bytes, 0 by default
51 align: Entry start offset alignment relative to the start of the
52 containing section, or None
53 align_size: Entry size alignment, or None
54 align_end: Entry end offset alignment relative to the start of the
55 containing section, or None
56 pad_before: Number of pad bytes before the contents when it is placed
57 in the containing section, 0 if none. The pad bytes become part of
59 pad_after: Number of pad bytes after the contents when it is placed in
60 the containing section, 0 if none. The pad bytes become part of
62 data: Contents of entry (string of bytes). This does not include
63 padding created by pad_before or pad_after. If the entry is
64 compressed, this contains the compressed data.
65 uncomp_data: Original uncompressed data, if this entry is compressed,
67 compress: Compression algoithm used (e.g. 'lz4'), 'none' if none
68 orig_offset: Original offset value read from node
69 orig_size: Original size value read from node
70 missing: True if this entry is missing its contents
71 allow_missing: Allow children of this entry to be missing (used by
72 subclasses such as Entry_section)
73 external: True if this entry contains an external binary blob
75 def __init__(self, section, etype, node, name_prefix=''):
76 # Put this here to allow entry-docs and help to work without libfdt
78 from binman import state
80 self.section = section
83 self.name = node and (name_prefix + node.name) or 'none'
86 self.pre_reset_size = None
87 self.uncomp_size = None
89 self.uncomp_data = None
90 self.contents_size = 0
92 self.align_size = None
96 self.offset_unset = False
98 self._expand_size = False
99 self.compress = 'none'
101 self.external = False
102 self.allow_missing = False
105 def Lookup(node_path, etype, expanded):
106 """Look up the entry class for a node.
109 node_node: Path name of Node object containing information about
110 the entry to create (used for errors)
111 etype: Entry type to use
112 expanded: Use the expanded version of etype
115 The entry class object if found, else None if not found and expanded
119 ValueError if expanded is False and the class is not found
121 # Convert something like 'u-boot@0' to 'u_boot' since we are only
122 # interested in the type.
123 module_name = etype.replace('-', '_')
125 if '@' in module_name:
126 module_name = module_name.split('@')[0]
128 module_name += '_expanded'
129 module = modules.get(module_name)
131 # Also allow entry-type modules to be brought in from the etype directory.
133 # Import the module if we have not already done so.
136 module = importlib.import_module('binman.etype.' + module_name)
137 except ImportError as e:
140 raise ValueError("Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
141 (etype, node_path, module_name, e))
142 modules[module_name] = module
144 # Look up the expected class name
145 return getattr(module, 'Entry_%s' % module_name)
148 def Create(section, node, etype=None, expanded=False):
149 """Create a new entry for a node.
152 section: Section object containing this node
153 node: Node object containing information about the entry to
155 etype: Entry type to use, or None to work it out (used for tests)
156 expanded: True to use expanded versions of entries, where available
159 A new Entry object of the correct type (a subclass of Entry)
162 etype = fdt_util.GetString(node, 'type', node.name)
163 obj = Entry.Lookup(node.path, etype, expanded)
165 # Check whether to use the expanded entry
166 new_etype = etype + '-expanded'
167 can_expand = not fdt_util.GetBool(node, 'no-expanded')
168 if can_expand and obj.UseExpanded(node, etype, new_etype):
173 obj = Entry.Lookup(node.path, etype, False)
175 # Call its constructor to get the object we want.
176 return obj(section, etype, node)
179 """Read entry information from the node
181 This must be called as the first thing after the Entry is created.
183 This reads all the fields we recognise from the node, ready for use.
185 if 'pos' in self._node.props:
186 self.Raise("Please use 'offset' instead of 'pos'")
187 self.offset = fdt_util.GetInt(self._node, 'offset')
188 self.size = fdt_util.GetInt(self._node, 'size')
189 self.orig_offset = fdt_util.GetInt(self._node, 'orig-offset')
190 self.orig_size = fdt_util.GetInt(self._node, 'orig-size')
191 if self.GetImage().copy_to_orig:
192 self.orig_offset = self.offset
193 self.orig_size = self.size
195 # These should not be set in input files, but are set in an FDT map,
196 # which is also read by this code.
197 self.image_pos = fdt_util.GetInt(self._node, 'image-pos')
198 self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size')
200 self.align = fdt_util.GetInt(self._node, 'align')
201 if tools.NotPowerOfTwo(self.align):
202 raise ValueError("Node '%s': Alignment %s must be a power of two" %
203 (self._node.path, self.align))
204 self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0)
205 self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0)
206 self.align_size = fdt_util.GetInt(self._node, 'align-size')
207 if tools.NotPowerOfTwo(self.align_size):
208 self.Raise("Alignment size %s must be a power of two" %
210 self.align_end = fdt_util.GetInt(self._node, 'align-end')
211 self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
212 self.expand_size = fdt_util.GetBool(self._node, 'expand-size')
213 self.missing_msg = fdt_util.GetString(self._node, 'missing-msg')
215 # This is only supported by blobs and sections at present
216 self.compress = fdt_util.GetString(self._node, 'compress', 'none')
218 def GetDefaultFilename(self):
222 """Get the device trees used by this entry
225 Empty dict, if this entry is not a .dtb, otherwise:
227 key: Filename from this entry (without the path)
229 Entry object for this dtb
230 Filename of file containing this dtb
234 def ExpandEntries(self):
235 """Expand out entries which produce other entries
237 Some entries generate subnodes automatically, from which sub-entries
238 are then created. This method allows those to be added to the binman
239 definition for the current image. An entry which implements this method
240 should call state.AddSubnode() to add a subnode and can add properties
241 with state.AddString(), etc.
243 An example is 'files', which produces a section containing a list of
248 def AddMissingProperties(self, have_image_pos):
249 """Add new properties to the device tree as needed for this entry
252 have_image_pos: True if this entry has an image position. This can
253 be False if its parent section is compressed, since compression
254 groups all entries together into a compressed block of data,
255 obscuring the start of each individual child entry
257 for prop in ['offset', 'size']:
258 if not prop in self._node.props:
259 state.AddZeroProp(self._node, prop)
260 if have_image_pos and 'image-pos' not in self._node.props:
261 state.AddZeroProp(self._node, 'image-pos')
262 if self.GetImage().allow_repack:
263 if self.orig_offset is not None:
264 state.AddZeroProp(self._node, 'orig-offset', True)
265 if self.orig_size is not None:
266 state.AddZeroProp(self._node, 'orig-size', True)
268 if self.compress != 'none':
269 state.AddZeroProp(self._node, 'uncomp-size')
270 err = state.CheckAddHashProp(self._node)
274 def SetCalculatedProperties(self):
275 """Set the value of device-tree properties calculated by binman"""
276 state.SetInt(self._node, 'offset', self.offset)
277 state.SetInt(self._node, 'size', self.size)
278 base = self.section.GetRootSkipAtStart() if self.section else 0
279 if self.image_pos is not None:
280 state.SetInt(self._node, 'image-pos', self.image_pos - base)
281 if self.GetImage().allow_repack:
282 if self.orig_offset is not None:
283 state.SetInt(self._node, 'orig-offset', self.orig_offset, True)
284 if self.orig_size is not None:
285 state.SetInt(self._node, 'orig-size', self.orig_size, True)
286 if self.uncomp_size is not None:
287 state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
288 state.CheckSetHashValue(self._node, self.GetData)
290 def ProcessFdt(self, fdt):
291 """Allow entries to adjust the device tree
293 Some entries need to adjust the device tree for their purposes. This
294 may involve adding or deleting properties.
297 True if processing is complete
298 False if processing could not be completed due to a dependency.
299 This will cause the entry to be retried after others have been
304 def SetPrefix(self, prefix):
305 """Set the name prefix for a node
308 prefix: Prefix to set, or '' to not use a prefix
311 self.name = prefix + self.name
313 def SetContents(self, data):
314 """Set the contents of an entry
316 This sets both the data and content_size properties
319 data: Data to set to the contents (bytes)
322 self.contents_size = len(self.data)
324 def ProcessContentsUpdate(self, data):
325 """Update the contents of an entry, after the size is fixed
327 This checks that the new data is the same size as the old. If the size
328 has changed, this triggers a re-run of the packing algorithm.
331 data: Data to set to the contents (bytes)
334 ValueError if the new data size is not the same as the old
338 if state.AllowEntryExpansion() and new_size > self.contents_size:
339 # self.data will indicate the new size needed
341 elif state.AllowEntryContraction() and new_size < self.contents_size:
344 # If not allowed to change, try to deal with it or give up
346 if new_size > self.contents_size:
347 self.Raise('Cannot update entry size from %d to %d' %
348 (self.contents_size, new_size))
350 # Don't let the data shrink. Pad it if necessary
351 if size_ok and new_size < self.contents_size:
352 data += tools.GetBytes(0, self.contents_size - new_size)
355 tout.Debug("Entry '%s' size change from %s to %s" % (
356 self._node.path, ToHex(self.contents_size),
358 self.SetContents(data)
361 def ObtainContents(self):
362 """Figure out the contents of an entry.
365 True if the contents were found, False if another call is needed
366 after the other entries are processed.
368 # No contents by default: subclasses can implement this
371 def ResetForPack(self):
372 """Reset offset/size fields so that packing can be done again"""
373 self.Detail('ResetForPack: offset %s->%s, size %s->%s' %
374 (ToHex(self.offset), ToHex(self.orig_offset),
375 ToHex(self.size), ToHex(self.orig_size)))
376 self.pre_reset_size = self.size
377 self.offset = self.orig_offset
378 self.size = self.orig_size
380 def Pack(self, offset):
381 """Figure out how to pack the entry into the section
383 Most of the time the entries are not fully specified. There may be
384 an alignment but no size. In that case we take the size from the
385 contents of the entry.
387 If an entry has no hard-coded offset, it will be placed at @offset.
389 Once this function is complete, both the offset and size of the
393 Current section offset pointer
396 New section offset pointer (after this entry)
398 self.Detail('Packing: offset=%s, size=%s, content_size=%x' %
399 (ToHex(self.offset), ToHex(self.size),
401 if self.offset is None:
402 if self.offset_unset:
403 self.Raise('No offset set with offset-unset: should another '
404 'entry provide this correct offset?')
405 self.offset = tools.Align(offset, self.align)
406 needed = self.pad_before + self.contents_size + self.pad_after
407 needed = tools.Align(needed, self.align_size)
411 new_offset = self.offset + size
412 aligned_offset = tools.Align(new_offset, self.align_end)
413 if aligned_offset != new_offset:
414 size = aligned_offset - self.offset
415 new_offset = aligned_offset
420 if self.size < needed:
421 self.Raise("Entry contents size is %#x (%d) but entry size is "
422 "%#x (%d)" % (needed, needed, self.size, self.size))
423 # Check that the alignment is correct. It could be wrong if the
424 # and offset or size values were provided (i.e. not calculated), but
425 # conflict with the provided alignment values
426 if self.size != tools.Align(self.size, self.align_size):
427 self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
428 (self.size, self.size, self.align_size, self.align_size))
429 if self.offset != tools.Align(self.offset, self.align):
430 self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
431 (self.offset, self.offset, self.align, self.align))
432 self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' %
433 (self.offset, self.size, self.contents_size, new_offset))
437 def Raise(self, msg):
438 """Convenience function to raise an error referencing a node"""
439 raise ValueError("Node '%s': %s" % (self._node.path, msg))
441 def Detail(self, msg):
442 """Convenience function to log detail referencing a node"""
443 tag = "Node '%s'" % self._node.path
444 tout.Detail('%30s: %s' % (tag, msg))
446 def GetEntryArgsOrProps(self, props, required=False):
447 """Return the values of a set of properties
450 props: List of EntryArg objects
453 ValueError if a property is not found
458 python_prop = prop.name.replace('-', '_')
459 if hasattr(self, python_prop):
460 value = getattr(self, python_prop)
464 value = self.GetArg(prop.name, prop.datatype)
465 if value is None and required:
466 missing.append(prop.name)
469 self.GetImage().MissingArgs(self, missing)
473 """Get the path of a node
476 Full path of the node for this entry
478 return self._node.path
481 """Get the contents of an entry
484 bytes content of the entry, excluding any padding. If the entry is
485 compressed, the compressed data is returned
487 self.Detail('GetData: size %s' % ToHexSize(self.data))
490 def GetPaddedData(self, data=None):
491 """Get the data for an entry including any padding
493 Gets the entry data and uses its section's pad-byte value to add padding
494 before and after as defined by the pad-before and pad-after properties.
496 This does not consider alignment.
499 Contents of the entry along with any pad bytes before and
503 data = self.GetData()
504 return self.section.GetPaddedDataForEntry(self, data)
506 def GetOffsets(self):
507 """Get the offsets for siblings
509 Some entry types can contain information about the position or size of
510 other entries. An example of this is the Intel Flash Descriptor, which
511 knows where the Intel Management Engine section should go.
513 If this entry knows about the position of other entries, it can specify
514 this by returning values here
519 value: List containing position and size of the given entry
520 type. Either can be None if not known
524 def SetOffsetSize(self, offset, size):
525 """Set the offset and/or size of an entry
528 offset: New offset, or None to leave alone
529 size: New size, or None to leave alone
531 if offset is not None:
536 def SetImagePos(self, image_pos):
537 """Set the position in the image
540 image_pos: Position of this entry in the image
542 self.image_pos = image_pos + self.offset
544 def ProcessContents(self):
545 """Do any post-packing updates of entry contents
547 This function should call ProcessContentsUpdate() to update the entry
548 contents, if necessary, returning its return value here.
551 data: Data to set to the contents (bytes)
554 True if the new data size is OK, False if expansion is needed
557 ValueError if the new data size is not the same as the old and
558 state.AllowEntryExpansion() is False
562 def WriteSymbols(self, section):
563 """Write symbol values into binary files for access at run time
566 section: Section containing the entry
570 def CheckEntries(self):
571 """Check that the entry offsets are correct
573 This is used for entries which have extra offset requirements (other
574 than having to be fully inside their section). Sub-classes can implement
575 this function and raise if there is a problem.
583 return '%08x' % value
586 def WriteMapLine(fd, indent, name, offset, size, image_pos):
587 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
588 Entry.GetStr(offset), Entry.GetStr(size),
591 def WriteMap(self, fd, indent):
592 """Write a map of the entry to a .map file
595 fd: File to write the map to
596 indent: Curent indent level of map (0=none, 1=one level, etc.)
598 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
601 def GetEntries(self):
602 """Return a list of entries contained by this entry
605 List of entries, or None if none. A normal entry has no entries
606 within it so will return None
610 def GetArg(self, name, datatype=str):
611 """Get the value of an entry argument or device-tree-node property
613 Some node properties can be provided as arguments to binman. First check
614 the entry arguments, and fall back to the device tree if not found
618 datatype: Data type (str or int)
621 Value of argument as a string or int, or None if no value
624 ValueError if the argument cannot be converted to in
626 value = state.GetEntryArg(name)
627 if value is not None:
632 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
634 elif datatype == str:
637 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
640 value = fdt_util.GetDatatype(self._node, name, datatype)
644 def WriteDocs(modules, test_missing=None):
645 """Write out documentation about the various entry types to stdout
648 modules: List of modules to include
649 test_missing: Used for testing. This is a module to report
652 print('''Binman Entry Documentation
653 ===========================
655 This file describes the entry types supported by binman. These entry types can
656 be placed in an image one by one to build up a final firmware image. It is
657 fairly easy to create new entry types. Just add a new file to the 'etype'
658 directory. You can use the existing entries as examples.
660 Note that some entries are subclasses of others, using and extending their
661 features to produce new behaviours.
665 modules = sorted(modules)
667 # Don't show the test entry
668 if '_testing' in modules:
669 modules.remove('_testing')
672 module = Entry.Lookup('WriteDocs', name, False)
673 docs = getattr(module, '__doc__')
674 if test_missing == name:
677 lines = docs.splitlines()
678 first_line = lines[0]
679 rest = [line[4:] for line in lines[1:]]
680 hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
682 print('-' * len(hdr))
683 print('\n'.join(rest))
690 raise ValueError('Documentation is missing for modules: %s' %
693 def GetUniqueName(self):
694 """Get a unique name for a node
697 String containing a unique name for a node, consisting of the name
698 of all ancestors (starting from within the 'binman' node) separated
699 by a dot ('.'). This can be useful for generating unique filesnames
700 in the output directory.
706 if node.name == 'binman':
708 name = '%s.%s' % (node.name, name)
711 def ExpandToLimit(self, limit):
712 """Expand an entry so that it ends at the given offset limit"""
713 if self.offset + self.size < limit:
714 self.size = limit - self.offset
715 # Request the contents again, since changing the size requires that
716 # the data grows. This should not fail, but check it to be sure.
717 if not self.ObtainContents():
718 self.Raise('Cannot obtain contents when expanding entry')
720 def HasSibling(self, name):
721 """Check if there is a sibling of a given name
724 True if there is an entry with this name in the the same section,
727 return name in self.section.GetEntries()
729 def GetSiblingImagePos(self, name):
730 """Return the image position of the given sibling
733 Image position of sibling, or None if the sibling has no position,
734 or False if there is no such sibling
736 if not self.HasSibling(name):
738 return self.section.GetEntries()[name].image_pos
741 def AddEntryInfo(entries, indent, name, etype, size, image_pos,
742 uncomp_size, offset, entry):
743 """Add a new entry to the entries list
746 entries: List (of EntryInfo objects) to add to
747 indent: Current indent level to add to list
748 name: Entry name (string)
749 etype: Entry type (string)
750 size: Entry size in bytes (int)
751 image_pos: Position within image in bytes (int)
752 uncomp_size: Uncompressed size if the entry uses compression, else
754 offset: Entry offset within parent in bytes (int)
757 entries.append(EntryInfo(indent, name, etype, size, image_pos,
758 uncomp_size, offset, entry))
760 def ListEntries(self, entries, indent):
761 """Add files in this entry to the list of entries
763 This can be overridden by subclasses which need different behaviour.
766 entries: List (of EntryInfo objects) to add to
767 indent: Current indent level to add to list
769 self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
770 self.image_pos, self.uncomp_size, self.offset, self)
772 def ReadData(self, decomp=True):
773 """Read the data for an entry from the image
775 This is used when the image has been read in and we want to extract the
776 data for a particular entry from that image.
779 decomp: True to decompress any compressed data before returning it;
780 False to return the raw, uncompressed data
785 # Use True here so that we get an uncompressed section to work from,
786 # although compressed sections are currently not supported
787 tout.Debug("ReadChildData section '%s', entry '%s'" %
788 (self.section.GetPath(), self.GetPath()))
789 data = self.section.ReadChildData(self, decomp)
792 def ReadChildData(self, child, decomp=True):
793 """Read the data for a particular child entry
795 This reads data from the parent and extracts the piece that relates to
799 child: Child entry to read data for (must be valid)
800 decomp: True to decompress any compressed data before returning it;
801 False to return the raw, uncompressed data
804 Data for the child (bytes)
808 def LoadData(self, decomp=True):
809 data = self.ReadData(decomp)
810 self.contents_size = len(data)
811 self.ProcessContentsUpdate(data)
812 self.Detail('Loaded data size %x' % len(data))
815 """Get the image containing this entry
818 Image object containing this entry
820 return self.section.GetImage()
822 def WriteData(self, data, decomp=True):
823 """Write the data to an entry in the image
825 This is used when the image has been read in and we want to replace the
826 data for a particular entry in that image.
828 The image must be re-packed and written out afterwards.
831 data: Data to replace it with
832 decomp: True to compress the data if needed, False if data is
833 already compressed so should be used as is
836 True if the data did not result in a resize of this entry, False if
837 the entry must be resized
839 if self.size is not None:
840 self.contents_size = self.size
842 self.contents_size = self.pre_reset_size
843 ok = self.ProcessContentsUpdate(data)
844 self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
845 section_ok = self.section.WriteChildData(self)
846 return ok and section_ok
848 def WriteChildData(self, child):
849 """Handle writing the data in a child entry
851 This should be called on the child's parent section after the child's
852 data has been updated. It
854 This base-class implementation does nothing, since the base Entry object
855 does not have any children.
858 child: Child Entry that was written
861 True if the section could be updated successfully, False if the
862 data is such that the section could not updat
866 def GetSiblingOrder(self):
867 """Get the relative order of an entry amoung its siblings
870 'start' if this entry is first among siblings, 'end' if last,
873 entries = list(self.section.GetEntries().values())
875 if self == entries[0]:
877 elif self == entries[-1]:
881 def SetAllowMissing(self, allow_missing):
882 """Set whether a section allows missing external blobs
885 allow_missing: True if allowed, False if not allowed
887 # This is meaningless for anything other than sections
890 def CheckMissing(self, missing_list):
891 """Check if any entries in this section have missing external blobs
893 If there are missing blobs, the entries are added to the list
896 missing_list: List of Entry objects to be added to
899 missing_list.append(self)
901 def GetAllowMissing(self):
902 """Get whether a section allows missing external blobs
905 True if allowed, False if not allowed
907 return self.allow_missing
909 def GetHelpTags(self):
910 """Get the tags use for missing-blob help
913 list of possible tags, most desirable first
915 return list(filter(None, [self.missing_msg, self.name, self.etype]))
917 def CompressData(self, indata):
918 """Compress data according to the entry's compression method
921 indata: Data to compress
924 Compressed data (first word is the compressed size)
926 self.uncomp_data = indata
927 if self.compress != 'none':
928 self.uncomp_size = len(indata)
929 data = tools.Compress(indata, self.compress)
933 def UseExpanded(cls, node, etype, new_etype):
934 """Check whether to use an expanded entry type
936 This is called by Entry.Create() when it finds an expanded version of
937 an entry type (e.g. 'u-boot-expanded'). If this method returns True then
938 it will be used (e.g. in place of 'u-boot'). If it returns False, it is
942 node: Node object containing information about the entry to
944 etype: Original entry type being used
945 new_etype: New entry type proposed
948 True to use this entry type, False to use the original one
950 tout.Info("Node '%s': etype '%s': %s selected" %
951 (node.path, etype, new_etype))