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):
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
114 The entry class object if found, else None
116 # Convert something like 'u-boot@0' to 'u_boot' since we are only
117 # interested in the type.
118 module_name = etype.replace('-', '_')
119 if '@' in module_name:
120 module_name = module_name.split('@')[0]
121 module = modules.get(module_name)
123 # Also allow entry-type modules to be brought in from the etype directory.
125 # Import the module if we have not already done so.
128 module = importlib.import_module('binman.etype.' + module_name)
129 except ImportError as e:
130 raise ValueError("Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
131 (etype, node_path, module_name, e))
132 modules[module_name] = module
134 # Look up the expected class name
135 return getattr(module, 'Entry_%s' % module_name)
138 def Create(section, node, etype=None):
139 """Create a new entry for a node.
142 section: Section object containing this node
143 node: Node object containing information about the entry to
145 etype: Entry type to use, or None to work it out (used for tests)
148 A new Entry object of the correct type (a subclass of Entry)
151 etype = fdt_util.GetString(node, 'type', node.name)
152 obj = Entry.Lookup(node.path, etype)
154 # Call its constructor to get the object we want.
155 return obj(section, etype, node)
158 """Read entry information from the node
160 This must be called as the first thing after the Entry is created.
162 This reads all the fields we recognise from the node, ready for use.
164 if 'pos' in self._node.props:
165 self.Raise("Please use 'offset' instead of 'pos'")
166 self.offset = fdt_util.GetInt(self._node, 'offset')
167 self.size = fdt_util.GetInt(self._node, 'size')
168 self.orig_offset = fdt_util.GetInt(self._node, 'orig-offset')
169 self.orig_size = fdt_util.GetInt(self._node, 'orig-size')
170 if self.GetImage().copy_to_orig:
171 self.orig_offset = self.offset
172 self.orig_size = self.size
174 # These should not be set in input files, but are set in an FDT map,
175 # which is also read by this code.
176 self.image_pos = fdt_util.GetInt(self._node, 'image-pos')
177 self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size')
179 self.align = fdt_util.GetInt(self._node, 'align')
180 if tools.NotPowerOfTwo(self.align):
181 raise ValueError("Node '%s': Alignment %s must be a power of two" %
182 (self._node.path, self.align))
183 self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0)
184 self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0)
185 self.align_size = fdt_util.GetInt(self._node, 'align-size')
186 if tools.NotPowerOfTwo(self.align_size):
187 self.Raise("Alignment size %s must be a power of two" %
189 self.align_end = fdt_util.GetInt(self._node, 'align-end')
190 self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
191 self.expand_size = fdt_util.GetBool(self._node, 'expand-size')
192 self.missing_msg = fdt_util.GetString(self._node, 'missing-msg')
194 # This is only supported by blobs and sections at present
195 self.compress = fdt_util.GetString(self._node, 'compress', 'none')
197 def GetDefaultFilename(self):
201 """Get the device trees used by this entry
204 Empty dict, if this entry is not a .dtb, otherwise:
206 key: Filename from this entry (without the path)
208 Fdt object for this dtb, or None if not available
209 Filename of file containing this dtb
213 def ExpandEntries(self):
216 def AddMissingProperties(self):
217 """Add new properties to the device tree as needed for this entry"""
218 for prop in ['offset', 'size', 'image-pos']:
219 if not prop in self._node.props:
220 state.AddZeroProp(self._node, prop)
221 if self.GetImage().allow_repack:
222 if self.orig_offset is not None:
223 state.AddZeroProp(self._node, 'orig-offset', True)
224 if self.orig_size is not None:
225 state.AddZeroProp(self._node, 'orig-size', True)
227 if self.compress != 'none':
228 state.AddZeroProp(self._node, 'uncomp-size')
229 err = state.CheckAddHashProp(self._node)
233 def SetCalculatedProperties(self):
234 """Set the value of device-tree properties calculated by binman"""
235 state.SetInt(self._node, 'offset', self.offset)
236 state.SetInt(self._node, 'size', self.size)
237 base = self.section.GetRootSkipAtStart() if self.section else 0
238 state.SetInt(self._node, 'image-pos', self.image_pos - base)
239 if self.GetImage().allow_repack:
240 if self.orig_offset is not None:
241 state.SetInt(self._node, 'orig-offset', self.orig_offset, True)
242 if self.orig_size is not None:
243 state.SetInt(self._node, 'orig-size', self.orig_size, True)
244 if self.uncomp_size is not None:
245 state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
246 state.CheckSetHashValue(self._node, self.GetData)
248 def ProcessFdt(self, fdt):
249 """Allow entries to adjust the device tree
251 Some entries need to adjust the device tree for their purposes. This
252 may involve adding or deleting properties.
255 True if processing is complete
256 False if processing could not be completed due to a dependency.
257 This will cause the entry to be retried after others have been
262 def SetPrefix(self, prefix):
263 """Set the name prefix for a node
266 prefix: Prefix to set, or '' to not use a prefix
269 self.name = prefix + self.name
271 def SetContents(self, data):
272 """Set the contents of an entry
274 This sets both the data and content_size properties
277 data: Data to set to the contents (bytes)
280 self.contents_size = len(self.data)
282 def ProcessContentsUpdate(self, data):
283 """Update the contents of an entry, after the size is fixed
285 This checks that the new data is the same size as the old. If the size
286 has changed, this triggers a re-run of the packing algorithm.
289 data: Data to set to the contents (bytes)
292 ValueError if the new data size is not the same as the old
296 if state.AllowEntryExpansion() and new_size > self.contents_size:
297 # self.data will indicate the new size needed
299 elif state.AllowEntryContraction() and new_size < self.contents_size:
302 # If not allowed to change, try to deal with it or give up
304 if new_size > self.contents_size:
305 self.Raise('Cannot update entry size from %d to %d' %
306 (self.contents_size, new_size))
308 # Don't let the data shrink. Pad it if necessary
309 if size_ok and new_size < self.contents_size:
310 data += tools.GetBytes(0, self.contents_size - new_size)
313 tout.Debug("Entry '%s' size change from %s to %s" % (
314 self._node.path, ToHex(self.contents_size),
316 self.SetContents(data)
319 def ObtainContents(self):
320 """Figure out the contents of an entry.
323 True if the contents were found, False if another call is needed
324 after the other entries are processed.
326 # No contents by default: subclasses can implement this
329 def ResetForPack(self):
330 """Reset offset/size fields so that packing can be done again"""
331 self.Detail('ResetForPack: offset %s->%s, size %s->%s' %
332 (ToHex(self.offset), ToHex(self.orig_offset),
333 ToHex(self.size), ToHex(self.orig_size)))
334 self.pre_reset_size = self.size
335 self.offset = self.orig_offset
336 self.size = self.orig_size
338 def Pack(self, offset):
339 """Figure out how to pack the entry into the section
341 Most of the time the entries are not fully specified. There may be
342 an alignment but no size. In that case we take the size from the
343 contents of the entry.
345 If an entry has no hard-coded offset, it will be placed at @offset.
347 Once this function is complete, both the offset and size of the
351 Current section offset pointer
354 New section offset pointer (after this entry)
356 self.Detail('Packing: offset=%s, size=%s, content_size=%x' %
357 (ToHex(self.offset), ToHex(self.size),
359 if self.offset is None:
360 if self.offset_unset:
361 self.Raise('No offset set with offset-unset: should another '
362 'entry provide this correct offset?')
363 self.offset = tools.Align(offset, self.align)
364 needed = self.pad_before + self.contents_size + self.pad_after
365 needed = tools.Align(needed, self.align_size)
369 new_offset = self.offset + size
370 aligned_offset = tools.Align(new_offset, self.align_end)
371 if aligned_offset != new_offset:
372 size = aligned_offset - self.offset
373 new_offset = aligned_offset
378 if self.size < needed:
379 self.Raise("Entry contents size is %#x (%d) but entry size is "
380 "%#x (%d)" % (needed, needed, self.size, self.size))
381 # Check that the alignment is correct. It could be wrong if the
382 # and offset or size values were provided (i.e. not calculated), but
383 # conflict with the provided alignment values
384 if self.size != tools.Align(self.size, self.align_size):
385 self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
386 (self.size, self.size, self.align_size, self.align_size))
387 if self.offset != tools.Align(self.offset, self.align):
388 self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
389 (self.offset, self.offset, self.align, self.align))
390 self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' %
391 (self.offset, self.size, self.contents_size, new_offset))
395 def Raise(self, msg):
396 """Convenience function to raise an error referencing a node"""
397 raise ValueError("Node '%s': %s" % (self._node.path, msg))
399 def Detail(self, msg):
400 """Convenience function to log detail referencing a node"""
401 tag = "Node '%s'" % self._node.path
402 tout.Detail('%30s: %s' % (tag, msg))
404 def GetEntryArgsOrProps(self, props, required=False):
405 """Return the values of a set of properties
408 props: List of EntryArg objects
411 ValueError if a property is not found
416 python_prop = prop.name.replace('-', '_')
417 if hasattr(self, python_prop):
418 value = getattr(self, python_prop)
422 value = self.GetArg(prop.name, prop.datatype)
423 if value is None and required:
424 missing.append(prop.name)
427 self.Raise('Missing required properties/entry args: %s' %
428 (', '.join(missing)))
432 """Get the path of a node
435 Full path of the node for this entry
437 return self._node.path
440 self.Detail('GetData: size %s' % ToHexSize(self.data))
443 def GetOffsets(self):
444 """Get the offsets for siblings
446 Some entry types can contain information about the position or size of
447 other entries. An example of this is the Intel Flash Descriptor, which
448 knows where the Intel Management Engine section should go.
450 If this entry knows about the position of other entries, it can specify
451 this by returning values here
456 value: List containing position and size of the given entry
457 type. Either can be None if not known
461 def SetOffsetSize(self, offset, size):
462 """Set the offset and/or size of an entry
465 offset: New offset, or None to leave alone
466 size: New size, or None to leave alone
468 if offset is not None:
473 def SetImagePos(self, image_pos):
474 """Set the position in the image
477 image_pos: Position of this entry in the image
479 self.image_pos = image_pos + self.offset
481 def ProcessContents(self):
482 """Do any post-packing updates of entry contents
484 This function should call ProcessContentsUpdate() to update the entry
485 contents, if necessary, returning its return value here.
488 data: Data to set to the contents (bytes)
491 True if the new data size is OK, False if expansion is needed
494 ValueError if the new data size is not the same as the old and
495 state.AllowEntryExpansion() is False
499 def WriteSymbols(self, section):
500 """Write symbol values into binary files for access at run time
503 section: Section containing the entry
507 def CheckOffset(self):
508 """Check that the entry offsets are correct
510 This is used for entries which have extra offset requirements (other
511 than having to be fully inside their section). Sub-classes can implement
512 this function and raise if there is a problem.
520 return '%08x' % value
523 def WriteMapLine(fd, indent, name, offset, size, image_pos):
524 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
525 Entry.GetStr(offset), Entry.GetStr(size),
528 def WriteMap(self, fd, indent):
529 """Write a map of the entry to a .map file
532 fd: File to write the map to
533 indent: Curent indent level of map (0=none, 1=one level, etc.)
535 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
538 def GetEntries(self):
539 """Return a list of entries contained by this entry
542 List of entries, or None if none. A normal entry has no entries
543 within it so will return None
547 def GetArg(self, name, datatype=str):
548 """Get the value of an entry argument or device-tree-node property
550 Some node properties can be provided as arguments to binman. First check
551 the entry arguments, and fall back to the device tree if not found
555 datatype: Data type (str or int)
558 Value of argument as a string or int, or None if no value
561 ValueError if the argument cannot be converted to in
563 value = state.GetEntryArg(name)
564 if value is not None:
569 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
571 elif datatype == str:
574 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
577 value = fdt_util.GetDatatype(self._node, name, datatype)
581 def WriteDocs(modules, test_missing=None):
582 """Write out documentation about the various entry types to stdout
585 modules: List of modules to include
586 test_missing: Used for testing. This is a module to report
589 print('''Binman Entry Documentation
590 ===========================
592 This file describes the entry types supported by binman. These entry types can
593 be placed in an image one by one to build up a final firmware image. It is
594 fairly easy to create new entry types. Just add a new file to the 'etype'
595 directory. You can use the existing entries as examples.
597 Note that some entries are subclasses of others, using and extending their
598 features to produce new behaviours.
602 modules = sorted(modules)
604 # Don't show the test entry
605 if '_testing' in modules:
606 modules.remove('_testing')
609 module = Entry.Lookup('WriteDocs', name)
610 docs = getattr(module, '__doc__')
611 if test_missing == name:
614 lines = docs.splitlines()
615 first_line = lines[0]
616 rest = [line[4:] for line in lines[1:]]
617 hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
619 print('-' * len(hdr))
620 print('\n'.join(rest))
627 raise ValueError('Documentation is missing for modules: %s' %
630 def GetUniqueName(self):
631 """Get a unique name for a node
634 String containing a unique name for a node, consisting of the name
635 of all ancestors (starting from within the 'binman' node) separated
636 by a dot ('.'). This can be useful for generating unique filesnames
637 in the output directory.
643 if node.name == 'binman':
645 name = '%s.%s' % (node.name, name)
648 def ExpandToLimit(self, limit):
649 """Expand an entry so that it ends at the given offset limit"""
650 if self.offset + self.size < limit:
651 self.size = limit - self.offset
652 # Request the contents again, since changing the size requires that
653 # the data grows. This should not fail, but check it to be sure.
654 if not self.ObtainContents():
655 self.Raise('Cannot obtain contents when expanding entry')
657 def HasSibling(self, name):
658 """Check if there is a sibling of a given name
661 True if there is an entry with this name in the the same section,
664 return name in self.section.GetEntries()
666 def GetSiblingImagePos(self, name):
667 """Return the image position of the given sibling
670 Image position of sibling, or None if the sibling has no position,
671 or False if there is no such sibling
673 if not self.HasSibling(name):
675 return self.section.GetEntries()[name].image_pos
678 def AddEntryInfo(entries, indent, name, etype, size, image_pos,
679 uncomp_size, offset, entry):
680 """Add a new entry to the entries list
683 entries: List (of EntryInfo objects) to add to
684 indent: Current indent level to add to list
685 name: Entry name (string)
686 etype: Entry type (string)
687 size: Entry size in bytes (int)
688 image_pos: Position within image in bytes (int)
689 uncomp_size: Uncompressed size if the entry uses compression, else
691 offset: Entry offset within parent in bytes (int)
694 entries.append(EntryInfo(indent, name, etype, size, image_pos,
695 uncomp_size, offset, entry))
697 def ListEntries(self, entries, indent):
698 """Add files in this entry to the list of entries
700 This can be overridden by subclasses which need different behaviour.
703 entries: List (of EntryInfo objects) to add to
704 indent: Current indent level to add to list
706 self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
707 self.image_pos, self.uncomp_size, self.offset, self)
709 def ReadData(self, decomp=True):
710 """Read the data for an entry from the image
712 This is used when the image has been read in and we want to extract the
713 data for a particular entry from that image.
716 decomp: True to decompress any compressed data before returning it;
717 False to return the raw, uncompressed data
722 # Use True here so that we get an uncompressed section to work from,
723 # although compressed sections are currently not supported
724 tout.Debug("ReadChildData section '%s', entry '%s'" %
725 (self.section.GetPath(), self.GetPath()))
726 data = self.section.ReadChildData(self, decomp)
729 def ReadChildData(self, child, decomp=True):
730 """Read the data for a particular child entry
732 This reads data from the parent and extracts the piece that relates to
736 child: Child entry to read data for (must be valid)
737 decomp: True to decompress any compressed data before returning it;
738 False to return the raw, uncompressed data
741 Data for the child (bytes)
745 def LoadData(self, decomp=True):
746 data = self.ReadData(decomp)
747 self.contents_size = len(data)
748 self.ProcessContentsUpdate(data)
749 self.Detail('Loaded data size %x' % len(data))
752 """Get the image containing this entry
755 Image object containing this entry
757 return self.section.GetImage()
759 def WriteData(self, data, decomp=True):
760 """Write the data to an entry in the image
762 This is used when the image has been read in and we want to replace the
763 data for a particular entry in that image.
765 The image must be re-packed and written out afterwards.
768 data: Data to replace it with
769 decomp: True to compress the data if needed, False if data is
770 already compressed so should be used as is
773 True if the data did not result in a resize of this entry, False if
774 the entry must be resized
776 if self.size is not None:
777 self.contents_size = self.size
779 self.contents_size = self.pre_reset_size
780 ok = self.ProcessContentsUpdate(data)
781 self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
782 section_ok = self.section.WriteChildData(self)
783 return ok and section_ok
785 def WriteChildData(self, child):
786 """Handle writing the data in a child entry
788 This should be called on the child's parent section after the child's
789 data has been updated. It
791 This base-class implementation does nothing, since the base Entry object
792 does not have any children.
795 child: Child Entry that was written
798 True if the section could be updated successfully, False if the
799 data is such that the section could not updat
803 def GetSiblingOrder(self):
804 """Get the relative order of an entry amoung its siblings
807 'start' if this entry is first among siblings, 'end' if last,
810 entries = list(self.section.GetEntries().values())
812 if self == entries[0]:
814 elif self == entries[-1]:
818 def SetAllowMissing(self, allow_missing):
819 """Set whether a section allows missing external blobs
822 allow_missing: True if allowed, False if not allowed
824 # This is meaningless for anything other than sections
827 def CheckMissing(self, missing_list):
828 """Check if any entries in this section have missing external blobs
830 If there are missing blobs, the entries are added to the list
833 missing_list: List of Entry objects to be added to
836 missing_list.append(self)
838 def GetAllowMissing(self):
839 """Get whether a section allows missing external blobs
842 True if allowed, False if not allowed
844 return self.allow_missing
846 def GetHelpTags(self):
847 """Get the tags use for missing-blob help
850 list of possible tags, most desirable first
852 return list(filter(None, [self.missing_msg, self.name, self.etype]))
854 def CompressData(self, indata):
855 """Compress data according to the entry's compression method
858 indata: Data to compress
861 Compressed data (first word is the compressed size)
863 self.uncomp_data = indata
864 if self.compress != 'none':
865 self.uncomp_size = len(indata)
866 data = tools.Compress(indata, self.compress)