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))
442 """Convenience function to log info referencing a node"""
443 tag = "Info '%s'" % self._node.path
444 tout.Detail('%30s: %s' % (tag, msg))
446 def Detail(self, msg):
447 """Convenience function to log detail referencing a node"""
448 tag = "Node '%s'" % self._node.path
449 tout.Detail('%30s: %s' % (tag, msg))
451 def GetEntryArgsOrProps(self, props, required=False):
452 """Return the values of a set of properties
455 props: List of EntryArg objects
458 ValueError if a property is not found
463 python_prop = prop.name.replace('-', '_')
464 if hasattr(self, python_prop):
465 value = getattr(self, python_prop)
469 value = self.GetArg(prop.name, prop.datatype)
470 if value is None and required:
471 missing.append(prop.name)
474 self.GetImage().MissingArgs(self, missing)
478 """Get the path of a node
481 Full path of the node for this entry
483 return self._node.path
485 def GetData(self, required=True):
486 """Get the contents of an entry
489 required: True if the data must be present, False if it is OK to
493 bytes content of the entry, excluding any padding. If the entry is
494 compressed, the compressed data is returned
496 self.Detail('GetData: size %s' % ToHexSize(self.data))
499 def GetPaddedData(self, data=None):
500 """Get the data for an entry including any padding
502 Gets the entry data and uses its section's pad-byte value to add padding
503 before and after as defined by the pad-before and pad-after properties.
505 This does not consider alignment.
508 Contents of the entry along with any pad bytes before and
512 data = self.GetData()
513 return self.section.GetPaddedDataForEntry(self, data)
515 def GetOffsets(self):
516 """Get the offsets for siblings
518 Some entry types can contain information about the position or size of
519 other entries. An example of this is the Intel Flash Descriptor, which
520 knows where the Intel Management Engine section should go.
522 If this entry knows about the position of other entries, it can specify
523 this by returning values here
528 value: List containing position and size of the given entry
529 type. Either can be None if not known
533 def SetOffsetSize(self, offset, size):
534 """Set the offset and/or size of an entry
537 offset: New offset, or None to leave alone
538 size: New size, or None to leave alone
540 if offset is not None:
545 def SetImagePos(self, image_pos):
546 """Set the position in the image
549 image_pos: Position of this entry in the image
551 self.image_pos = image_pos + self.offset
553 def ProcessContents(self):
554 """Do any post-packing updates of entry contents
556 This function should call ProcessContentsUpdate() to update the entry
557 contents, if necessary, returning its return value here.
560 data: Data to set to the contents (bytes)
563 True if the new data size is OK, False if expansion is needed
566 ValueError if the new data size is not the same as the old and
567 state.AllowEntryExpansion() is False
571 def WriteSymbols(self, section):
572 """Write symbol values into binary files for access at run time
575 section: Section containing the entry
579 def CheckEntries(self):
580 """Check that the entry offsets are correct
582 This is used for entries which have extra offset requirements (other
583 than having to be fully inside their section). Sub-classes can implement
584 this function and raise if there is a problem.
592 return '%08x' % value
595 def WriteMapLine(fd, indent, name, offset, size, image_pos):
596 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
597 Entry.GetStr(offset), Entry.GetStr(size),
600 def WriteMap(self, fd, indent):
601 """Write a map of the entry to a .map file
604 fd: File to write the map to
605 indent: Curent indent level of map (0=none, 1=one level, etc.)
607 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
610 def GetEntries(self):
611 """Return a list of entries contained by this entry
614 List of entries, or None if none. A normal entry has no entries
615 within it so will return None
619 def GetArg(self, name, datatype=str):
620 """Get the value of an entry argument or device-tree-node property
622 Some node properties can be provided as arguments to binman. First check
623 the entry arguments, and fall back to the device tree if not found
627 datatype: Data type (str or int)
630 Value of argument as a string or int, or None if no value
633 ValueError if the argument cannot be converted to in
635 value = state.GetEntryArg(name)
636 if value is not None:
641 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
643 elif datatype == str:
646 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
649 value = fdt_util.GetDatatype(self._node, name, datatype)
653 def WriteDocs(modules, test_missing=None):
654 """Write out documentation about the various entry types to stdout
657 modules: List of modules to include
658 test_missing: Used for testing. This is a module to report
661 print('''Binman Entry Documentation
662 ===========================
664 This file describes the entry types supported by binman. These entry types can
665 be placed in an image one by one to build up a final firmware image. It is
666 fairly easy to create new entry types. Just add a new file to the 'etype'
667 directory. You can use the existing entries as examples.
669 Note that some entries are subclasses of others, using and extending their
670 features to produce new behaviours.
674 modules = sorted(modules)
676 # Don't show the test entry
677 if '_testing' in modules:
678 modules.remove('_testing')
681 module = Entry.Lookup('WriteDocs', name, False)
682 docs = getattr(module, '__doc__')
683 if test_missing == name:
686 lines = docs.splitlines()
687 first_line = lines[0]
688 rest = [line[4:] for line in lines[1:]]
689 hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
691 print('-' * len(hdr))
692 print('\n'.join(rest))
699 raise ValueError('Documentation is missing for modules: %s' %
702 def GetUniqueName(self):
703 """Get a unique name for a node
706 String containing a unique name for a node, consisting of the name
707 of all ancestors (starting from within the 'binman' node) separated
708 by a dot ('.'). This can be useful for generating unique filesnames
709 in the output directory.
715 if node.name == 'binman':
717 name = '%s.%s' % (node.name, name)
720 def ExpandToLimit(self, limit):
721 """Expand an entry so that it ends at the given offset limit"""
722 if self.offset + self.size < limit:
723 self.size = limit - self.offset
724 # Request the contents again, since changing the size requires that
725 # the data grows. This should not fail, but check it to be sure.
726 if not self.ObtainContents():
727 self.Raise('Cannot obtain contents when expanding entry')
729 def HasSibling(self, name):
730 """Check if there is a sibling of a given name
733 True if there is an entry with this name in the the same section,
736 return name in self.section.GetEntries()
738 def GetSiblingImagePos(self, name):
739 """Return the image position of the given sibling
742 Image position of sibling, or None if the sibling has no position,
743 or False if there is no such sibling
745 if not self.HasSibling(name):
747 return self.section.GetEntries()[name].image_pos
750 def AddEntryInfo(entries, indent, name, etype, size, image_pos,
751 uncomp_size, offset, entry):
752 """Add a new entry to the entries list
755 entries: List (of EntryInfo objects) to add to
756 indent: Current indent level to add to list
757 name: Entry name (string)
758 etype: Entry type (string)
759 size: Entry size in bytes (int)
760 image_pos: Position within image in bytes (int)
761 uncomp_size: Uncompressed size if the entry uses compression, else
763 offset: Entry offset within parent in bytes (int)
766 entries.append(EntryInfo(indent, name, etype, size, image_pos,
767 uncomp_size, offset, entry))
769 def ListEntries(self, entries, indent):
770 """Add files in this entry to the list of entries
772 This can be overridden by subclasses which need different behaviour.
775 entries: List (of EntryInfo objects) to add to
776 indent: Current indent level to add to list
778 self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
779 self.image_pos, self.uncomp_size, self.offset, self)
781 def ReadData(self, decomp=True):
782 """Read the data for an entry from the image
784 This is used when the image has been read in and we want to extract the
785 data for a particular entry from that image.
788 decomp: True to decompress any compressed data before returning it;
789 False to return the raw, uncompressed data
794 # Use True here so that we get an uncompressed section to work from,
795 # although compressed sections are currently not supported
796 tout.Debug("ReadChildData section '%s', entry '%s'" %
797 (self.section.GetPath(), self.GetPath()))
798 data = self.section.ReadChildData(self, decomp)
801 def ReadChildData(self, child, decomp=True):
802 """Read the data for a particular child entry
804 This reads data from the parent and extracts the piece that relates to
808 child: Child entry to read data for (must be valid)
809 decomp: True to decompress any compressed data before returning it;
810 False to return the raw, uncompressed data
813 Data for the child (bytes)
817 def LoadData(self, decomp=True):
818 data = self.ReadData(decomp)
819 self.contents_size = len(data)
820 self.ProcessContentsUpdate(data)
821 self.Detail('Loaded data size %x' % len(data))
824 """Get the image containing this entry
827 Image object containing this entry
829 return self.section.GetImage()
831 def WriteData(self, data, decomp=True):
832 """Write the data to an entry in the image
834 This is used when the image has been read in and we want to replace the
835 data for a particular entry in that image.
837 The image must be re-packed and written out afterwards.
840 data: Data to replace it with
841 decomp: True to compress the data if needed, False if data is
842 already compressed so should be used as is
845 True if the data did not result in a resize of this entry, False if
846 the entry must be resized
848 if self.size is not None:
849 self.contents_size = self.size
851 self.contents_size = self.pre_reset_size
852 ok = self.ProcessContentsUpdate(data)
853 self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
854 section_ok = self.section.WriteChildData(self)
855 return ok and section_ok
857 def WriteChildData(self, child):
858 """Handle writing the data in a child entry
860 This should be called on the child's parent section after the child's
861 data has been updated. It
863 This base-class implementation does nothing, since the base Entry object
864 does not have any children.
867 child: Child Entry that was written
870 True if the section could be updated successfully, False if the
871 data is such that the section could not updat
875 def GetSiblingOrder(self):
876 """Get the relative order of an entry amoung its siblings
879 'start' if this entry is first among siblings, 'end' if last,
882 entries = list(self.section.GetEntries().values())
884 if self == entries[0]:
886 elif self == entries[-1]:
890 def SetAllowMissing(self, allow_missing):
891 """Set whether a section allows missing external blobs
894 allow_missing: True if allowed, False if not allowed
896 # This is meaningless for anything other than sections
899 def CheckMissing(self, missing_list):
900 """Check if any entries in this section have missing external blobs
902 If there are missing blobs, the entries are added to the list
905 missing_list: List of Entry objects to be added to
908 missing_list.append(self)
910 def GetAllowMissing(self):
911 """Get whether a section allows missing external blobs
914 True if allowed, False if not allowed
916 return self.allow_missing
918 def GetHelpTags(self):
919 """Get the tags use for missing-blob help
922 list of possible tags, most desirable first
924 return list(filter(None, [self.missing_msg, self.name, self.etype]))
926 def CompressData(self, indata):
927 """Compress data according to the entry's compression method
930 indata: Data to compress
933 Compressed data (first word is the compressed size)
935 self.uncomp_data = indata
936 if self.compress != 'none':
937 self.uncomp_size = len(indata)
938 data = tools.Compress(indata, self.compress)
942 def UseExpanded(cls, node, etype, new_etype):
943 """Check whether to use an expanded entry type
945 This is called by Entry.Create() when it finds an expanded version of
946 an entry type (e.g. 'u-boot-expanded'). If this method returns True then
947 it will be used (e.g. in place of 'u-boot'). If it returns False, it is
951 node: Node object containing information about the entry to
953 etype: Original entry type being used
954 new_etype: New entry type proposed
957 True to use this entry type, False to use the original one
959 tout.Info("Node '%s': etype '%s': %s selected" %
960 (node.path, etype, new_etype))