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, have_image_pos):
217 """Add new properties to the device tree as needed for this entry
220 have_image_pos: True if this entry has an image position. This can
221 be False if its parent section is compressed, since compression
222 groups all entries together into a compressed block of data,
223 obscuring the start of each individual child entry
225 for prop in ['offset', 'size']:
226 if not prop in self._node.props:
227 state.AddZeroProp(self._node, prop)
228 if have_image_pos and 'image-pos' not in self._node.props:
229 state.AddZeroProp(self._node, 'image-pos')
230 if self.GetImage().allow_repack:
231 if self.orig_offset is not None:
232 state.AddZeroProp(self._node, 'orig-offset', True)
233 if self.orig_size is not None:
234 state.AddZeroProp(self._node, 'orig-size', True)
236 if self.compress != 'none':
237 state.AddZeroProp(self._node, 'uncomp-size')
238 err = state.CheckAddHashProp(self._node)
242 def SetCalculatedProperties(self):
243 """Set the value of device-tree properties calculated by binman"""
244 state.SetInt(self._node, 'offset', self.offset)
245 state.SetInt(self._node, 'size', self.size)
246 base = self.section.GetRootSkipAtStart() if self.section else 0
247 if self.image_pos is not None:
248 state.SetInt(self._node, 'image-pos', self.image_pos)
249 if self.GetImage().allow_repack:
250 if self.orig_offset is not None:
251 state.SetInt(self._node, 'orig-offset', self.orig_offset, True)
252 if self.orig_size is not None:
253 state.SetInt(self._node, 'orig-size', self.orig_size, True)
254 if self.uncomp_size is not None:
255 state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
256 state.CheckSetHashValue(self._node, self.GetData)
258 def ProcessFdt(self, fdt):
259 """Allow entries to adjust the device tree
261 Some entries need to adjust the device tree for their purposes. This
262 may involve adding or deleting properties.
265 True if processing is complete
266 False if processing could not be completed due to a dependency.
267 This will cause the entry to be retried after others have been
272 def SetPrefix(self, prefix):
273 """Set the name prefix for a node
276 prefix: Prefix to set, or '' to not use a prefix
279 self.name = prefix + self.name
281 def SetContents(self, data):
282 """Set the contents of an entry
284 This sets both the data and content_size properties
287 data: Data to set to the contents (bytes)
290 self.contents_size = len(self.data)
292 def ProcessContentsUpdate(self, data):
293 """Update the contents of an entry, after the size is fixed
295 This checks that the new data is the same size as the old. If the size
296 has changed, this triggers a re-run of the packing algorithm.
299 data: Data to set to the contents (bytes)
302 ValueError if the new data size is not the same as the old
306 if state.AllowEntryExpansion() and new_size > self.contents_size:
307 # self.data will indicate the new size needed
309 elif state.AllowEntryContraction() and new_size < self.contents_size:
312 # If not allowed to change, try to deal with it or give up
314 if new_size > self.contents_size:
315 self.Raise('Cannot update entry size from %d to %d' %
316 (self.contents_size, new_size))
318 # Don't let the data shrink. Pad it if necessary
319 if size_ok and new_size < self.contents_size:
320 data += tools.GetBytes(0, self.contents_size - new_size)
323 tout.Debug("Entry '%s' size change from %s to %s" % (
324 self._node.path, ToHex(self.contents_size),
326 self.SetContents(data)
329 def ObtainContents(self):
330 """Figure out the contents of an entry.
333 True if the contents were found, False if another call is needed
334 after the other entries are processed.
336 # No contents by default: subclasses can implement this
339 def ResetForPack(self):
340 """Reset offset/size fields so that packing can be done again"""
341 self.Detail('ResetForPack: offset %s->%s, size %s->%s' %
342 (ToHex(self.offset), ToHex(self.orig_offset),
343 ToHex(self.size), ToHex(self.orig_size)))
344 self.pre_reset_size = self.size
345 self.offset = self.orig_offset
346 self.size = self.orig_size
348 def Pack(self, offset):
349 """Figure out how to pack the entry into the section
351 Most of the time the entries are not fully specified. There may be
352 an alignment but no size. In that case we take the size from the
353 contents of the entry.
355 If an entry has no hard-coded offset, it will be placed at @offset.
357 Once this function is complete, both the offset and size of the
361 Current section offset pointer
364 New section offset pointer (after this entry)
366 self.Detail('Packing: offset=%s, size=%s, content_size=%x' %
367 (ToHex(self.offset), ToHex(self.size),
369 if self.offset is None:
370 if self.offset_unset:
371 self.Raise('No offset set with offset-unset: should another '
372 'entry provide this correct offset?')
373 self.offset = tools.Align(offset, self.align)
374 needed = self.pad_before + self.contents_size + self.pad_after
375 needed = tools.Align(needed, self.align_size)
379 new_offset = self.offset + size
380 aligned_offset = tools.Align(new_offset, self.align_end)
381 if aligned_offset != new_offset:
382 size = aligned_offset - self.offset
383 new_offset = aligned_offset
388 if self.size < needed:
389 self.Raise("Entry contents size is %#x (%d) but entry size is "
390 "%#x (%d)" % (needed, needed, self.size, self.size))
391 # Check that the alignment is correct. It could be wrong if the
392 # and offset or size values were provided (i.e. not calculated), but
393 # conflict with the provided alignment values
394 if self.size != tools.Align(self.size, self.align_size):
395 self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
396 (self.size, self.size, self.align_size, self.align_size))
397 if self.offset != tools.Align(self.offset, self.align):
398 self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
399 (self.offset, self.offset, self.align, self.align))
400 self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' %
401 (self.offset, self.size, self.contents_size, new_offset))
405 def Raise(self, msg):
406 """Convenience function to raise an error referencing a node"""
407 raise ValueError("Node '%s': %s" % (self._node.path, msg))
409 def Detail(self, msg):
410 """Convenience function to log detail referencing a node"""
411 tag = "Node '%s'" % self._node.path
412 tout.Detail('%30s: %s' % (tag, msg))
414 def GetEntryArgsOrProps(self, props, required=False):
415 """Return the values of a set of properties
418 props: List of EntryArg objects
421 ValueError if a property is not found
426 python_prop = prop.name.replace('-', '_')
427 if hasattr(self, python_prop):
428 value = getattr(self, python_prop)
432 value = self.GetArg(prop.name, prop.datatype)
433 if value is None and required:
434 missing.append(prop.name)
437 self.Raise('Missing required properties/entry args: %s' %
438 (', '.join(missing)))
442 """Get the path of a node
445 Full path of the node for this entry
447 return self._node.path
450 """Get the contents of an entry
453 bytes content of the entry, excluding any padding. If the entry is
454 compressed, the compressed data is returned
456 self.Detail('GetData: size %s' % ToHexSize(self.data))
459 def GetOffsets(self):
460 """Get the offsets for siblings
462 Some entry types can contain information about the position or size of
463 other entries. An example of this is the Intel Flash Descriptor, which
464 knows where the Intel Management Engine section should go.
466 If this entry knows about the position of other entries, it can specify
467 this by returning values here
472 value: List containing position and size of the given entry
473 type. Either can be None if not known
477 def SetOffsetSize(self, offset, size):
478 """Set the offset and/or size of an entry
481 offset: New offset, or None to leave alone
482 size: New size, or None to leave alone
484 if offset is not None:
489 def SetImagePos(self, image_pos):
490 """Set the position in the image
493 image_pos: Position of this entry in the image
495 self.image_pos = image_pos + self.offset
497 def ProcessContents(self):
498 """Do any post-packing updates of entry contents
500 This function should call ProcessContentsUpdate() to update the entry
501 contents, if necessary, returning its return value here.
504 data: Data to set to the contents (bytes)
507 True if the new data size is OK, False if expansion is needed
510 ValueError if the new data size is not the same as the old and
511 state.AllowEntryExpansion() is False
515 def WriteSymbols(self, section):
516 """Write symbol values into binary files for access at run time
519 section: Section containing the entry
523 def CheckOffset(self):
524 """Check that the entry offsets are correct
526 This is used for entries which have extra offset requirements (other
527 than having to be fully inside their section). Sub-classes can implement
528 this function and raise if there is a problem.
536 return '%08x' % value
539 def WriteMapLine(fd, indent, name, offset, size, image_pos):
540 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
541 Entry.GetStr(offset), Entry.GetStr(size),
544 def WriteMap(self, fd, indent):
545 """Write a map of the entry to a .map file
548 fd: File to write the map to
549 indent: Curent indent level of map (0=none, 1=one level, etc.)
551 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
554 def GetEntries(self):
555 """Return a list of entries contained by this entry
558 List of entries, or None if none. A normal entry has no entries
559 within it so will return None
563 def GetArg(self, name, datatype=str):
564 """Get the value of an entry argument or device-tree-node property
566 Some node properties can be provided as arguments to binman. First check
567 the entry arguments, and fall back to the device tree if not found
571 datatype: Data type (str or int)
574 Value of argument as a string or int, or None if no value
577 ValueError if the argument cannot be converted to in
579 value = state.GetEntryArg(name)
580 if value is not None:
585 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
587 elif datatype == str:
590 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
593 value = fdt_util.GetDatatype(self._node, name, datatype)
597 def WriteDocs(modules, test_missing=None):
598 """Write out documentation about the various entry types to stdout
601 modules: List of modules to include
602 test_missing: Used for testing. This is a module to report
605 print('''Binman Entry Documentation
606 ===========================
608 This file describes the entry types supported by binman. These entry types can
609 be placed in an image one by one to build up a final firmware image. It is
610 fairly easy to create new entry types. Just add a new file to the 'etype'
611 directory. You can use the existing entries as examples.
613 Note that some entries are subclasses of others, using and extending their
614 features to produce new behaviours.
618 modules = sorted(modules)
620 # Don't show the test entry
621 if '_testing' in modules:
622 modules.remove('_testing')
625 module = Entry.Lookup('WriteDocs', name)
626 docs = getattr(module, '__doc__')
627 if test_missing == name:
630 lines = docs.splitlines()
631 first_line = lines[0]
632 rest = [line[4:] for line in lines[1:]]
633 hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
635 print('-' * len(hdr))
636 print('\n'.join(rest))
643 raise ValueError('Documentation is missing for modules: %s' %
646 def GetUniqueName(self):
647 """Get a unique name for a node
650 String containing a unique name for a node, consisting of the name
651 of all ancestors (starting from within the 'binman' node) separated
652 by a dot ('.'). This can be useful for generating unique filesnames
653 in the output directory.
659 if node.name == 'binman':
661 name = '%s.%s' % (node.name, name)
664 def ExpandToLimit(self, limit):
665 """Expand an entry so that it ends at the given offset limit"""
666 if self.offset + self.size < limit:
667 self.size = limit - self.offset
668 # Request the contents again, since changing the size requires that
669 # the data grows. This should not fail, but check it to be sure.
670 if not self.ObtainContents():
671 self.Raise('Cannot obtain contents when expanding entry')
673 def HasSibling(self, name):
674 """Check if there is a sibling of a given name
677 True if there is an entry with this name in the the same section,
680 return name in self.section.GetEntries()
682 def GetSiblingImagePos(self, name):
683 """Return the image position of the given sibling
686 Image position of sibling, or None if the sibling has no position,
687 or False if there is no such sibling
689 if not self.HasSibling(name):
691 return self.section.GetEntries()[name].image_pos
694 def AddEntryInfo(entries, indent, name, etype, size, image_pos,
695 uncomp_size, offset, entry):
696 """Add a new entry to the entries list
699 entries: List (of EntryInfo objects) to add to
700 indent: Current indent level to add to list
701 name: Entry name (string)
702 etype: Entry type (string)
703 size: Entry size in bytes (int)
704 image_pos: Position within image in bytes (int)
705 uncomp_size: Uncompressed size if the entry uses compression, else
707 offset: Entry offset within parent in bytes (int)
710 entries.append(EntryInfo(indent, name, etype, size, image_pos,
711 uncomp_size, offset, entry))
713 def ListEntries(self, entries, indent):
714 """Add files in this entry to the list of entries
716 This can be overridden by subclasses which need different behaviour.
719 entries: List (of EntryInfo objects) to add to
720 indent: Current indent level to add to list
722 self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
723 self.image_pos, self.uncomp_size, self.offset, self)
725 def ReadData(self, decomp=True):
726 """Read the data for an entry from the image
728 This is used when the image has been read in and we want to extract the
729 data for a particular entry from that image.
732 decomp: True to decompress any compressed data before returning it;
733 False to return the raw, uncompressed data
738 # Use True here so that we get an uncompressed section to work from,
739 # although compressed sections are currently not supported
740 tout.Debug("ReadChildData section '%s', entry '%s'" %
741 (self.section.GetPath(), self.GetPath()))
742 data = self.section.ReadChildData(self, decomp)
745 def ReadChildData(self, child, decomp=True):
746 """Read the data for a particular child entry
748 This reads data from the parent and extracts the piece that relates to
752 child: Child entry to read data for (must be valid)
753 decomp: True to decompress any compressed data before returning it;
754 False to return the raw, uncompressed data
757 Data for the child (bytes)
761 def LoadData(self, decomp=True):
762 data = self.ReadData(decomp)
763 self.contents_size = len(data)
764 self.ProcessContentsUpdate(data)
765 self.Detail('Loaded data size %x' % len(data))
768 """Get the image containing this entry
771 Image object containing this entry
773 return self.section.GetImage()
775 def WriteData(self, data, decomp=True):
776 """Write the data to an entry in the image
778 This is used when the image has been read in and we want to replace the
779 data for a particular entry in that image.
781 The image must be re-packed and written out afterwards.
784 data: Data to replace it with
785 decomp: True to compress the data if needed, False if data is
786 already compressed so should be used as is
789 True if the data did not result in a resize of this entry, False if
790 the entry must be resized
792 if self.size is not None:
793 self.contents_size = self.size
795 self.contents_size = self.pre_reset_size
796 ok = self.ProcessContentsUpdate(data)
797 self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
798 section_ok = self.section.WriteChildData(self)
799 return ok and section_ok
801 def WriteChildData(self, child):
802 """Handle writing the data in a child entry
804 This should be called on the child's parent section after the child's
805 data has been updated. It
807 This base-class implementation does nothing, since the base Entry object
808 does not have any children.
811 child: Child Entry that was written
814 True if the section could be updated successfully, False if the
815 data is such that the section could not updat
819 def GetSiblingOrder(self):
820 """Get the relative order of an entry amoung its siblings
823 'start' if this entry is first among siblings, 'end' if last,
826 entries = list(self.section.GetEntries().values())
828 if self == entries[0]:
830 elif self == entries[-1]:
834 def SetAllowMissing(self, allow_missing):
835 """Set whether a section allows missing external blobs
838 allow_missing: True if allowed, False if not allowed
840 # This is meaningless for anything other than sections
843 def CheckMissing(self, missing_list):
844 """Check if any entries in this section have missing external blobs
846 If there are missing blobs, the entries are added to the list
849 missing_list: List of Entry objects to be added to
852 missing_list.append(self)
854 def GetAllowMissing(self):
855 """Get whether a section allows missing external blobs
858 True if allowed, False if not allowed
860 return self.allow_missing
862 def GetHelpTags(self):
863 """Get the tags use for missing-blob help
866 list of possible tags, most desirable first
868 return list(filter(None, [self.missing_msg, self.name, self.etype]))
870 def CompressData(self, indata):
871 """Compress data according to the entry's compression method
874 indata: Data to compress
877 Compressed data (first word is the compressed size)
879 self.uncomp_data = indata
880 if self.compress != 'none':
881 self.uncomp_size = len(indata)
882 data = tools.Compress(indata, self.compress)