1 # SPDX-License-Identifier: GPL-2.0+
2 # Copyright (c) 2016 Google, Inc
4 # Base class for all entries
7 from __future__ import print_function
9 from collections import namedtuple
11 # importlib was introduced in Python 2.7 but there was a report of it not
12 # working in 2.7.12, so we work around this:
13 # http://lists.denx.de/pipermail/u-boot/2016-October/269729.html
18 have_importlib = False
25 from tools import ToHex, ToHexSize
30 our_path = os.path.dirname(os.path.realpath(__file__))
33 # An argument which can be passed to entries on the command line, in lieu of
34 # device-tree properties.
35 EntryArg = namedtuple('EntryArg', ['name', 'datatype'])
37 # Information about an entry for use when displaying summaries
38 EntryInfo = namedtuple('EntryInfo', ['indent', 'name', 'etype', 'size',
39 'image_pos', 'uncomp_size', 'offset',
43 """An Entry in the section
45 An entry corresponds to a single node in the device-tree description
46 of the section. Each entry ends up being a part of the final section.
47 Entries can be placed either right next to each other, or with padding
48 between them. The type of the entry determines the data that is in it.
50 This class is not used by itself. All entry objects are subclasses of
54 section: Section object containing this entry
55 node: The node that created this entry
56 offset: Offset of entry within the section, None if not known yet (in
57 which case it will be calculated by Pack())
58 size: Entry size in bytes, None if not known
59 uncomp_size: Size of uncompressed data in bytes, if the entry is
61 contents_size: Size of contents in bytes, 0 by default
62 align: Entry start offset alignment, or None
63 align_size: Entry size alignment, or None
64 align_end: Entry end offset alignment, or None
65 pad_before: Number of pad bytes before the contents, 0 if none
66 pad_after: Number of pad bytes after the contents, 0 if none
67 data: Contents of entry (string of bytes)
68 compress: Compression algoithm used (e.g. 'lz4'), 'none' if none
69 orig_offset: Original offset value read from node
70 orig_size: Original size value read from node
72 def __init__(self, section, etype, node, name_prefix=''):
73 # Put this here to allow entry-docs and help to work without libfdt
77 self.section = section
80 self.name = node and (name_prefix + node.name) or 'none'
83 self.uncomp_size = None
85 self.contents_size = 0
87 self.align_size = None
91 self.offset_unset = False
93 self._expand_size = False
94 self.compress = 'none'
97 def Lookup(node_path, etype):
98 """Look up the entry class for a node.
101 node_node: Path name of Node object containing information about
102 the entry to create (used for errors)
103 etype: Entry type to use
106 The entry class object if found, else None
108 # Convert something like 'u-boot@0' to 'u_boot' since we are only
109 # interested in the type.
110 module_name = etype.replace('-', '_')
111 if '@' in module_name:
112 module_name = module_name.split('@')[0]
113 module = modules.get(module_name)
115 # Also allow entry-type modules to be brought in from the etype directory.
117 # Import the module if we have not already done so.
120 sys.path.insert(0, os.path.join(our_path, 'etype'))
123 module = importlib.import_module(module_name)
125 module = __import__(module_name)
126 except ImportError as e:
127 raise ValueError("Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
128 (etype, node_path, module_name, e))
131 modules[module_name] = module
133 # Look up the expected class name
134 return getattr(module, 'Entry_%s' % module_name)
137 def Create(section, node, etype=None):
138 """Create a new entry for a node.
141 section: Section object containing this node
142 node: Node object containing information about the entry to
144 etype: Entry type to use, or None to work it out (used for tests)
147 A new Entry object of the correct type (a subclass of Entry)
150 etype = fdt_util.GetString(node, 'type', node.name)
151 obj = Entry.Lookup(node.path, etype)
153 # Call its constructor to get the object we want.
154 return obj(section, etype, node)
157 """Read entry information from the node
159 This must be called as the first thing after the Entry is created.
161 This reads all the fields we recognise from the node, ready for use.
163 if 'pos' in self._node.props:
164 self.Raise("Please use 'offset' instead of 'pos'")
165 self.offset = fdt_util.GetInt(self._node, 'offset')
166 self.size = fdt_util.GetInt(self._node, 'size')
167 self.orig_offset = fdt_util.GetInt(self._node, 'orig-offset')
168 self.orig_size = fdt_util.GetInt(self._node, 'orig-size')
169 if self.GetImage().copy_to_orig:
170 self.orig_offset = self.offset
171 self.orig_size = self.size
173 # These should not be set in input files, but are set in an FDT map,
174 # which is also read by this code.
175 self.image_pos = fdt_util.GetInt(self._node, 'image-pos')
176 self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size')
178 self.align = fdt_util.GetInt(self._node, 'align')
179 if tools.NotPowerOfTwo(self.align):
180 raise ValueError("Node '%s': Alignment %s must be a power of two" %
181 (self._node.path, self.align))
182 self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0)
183 self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0)
184 self.align_size = fdt_util.GetInt(self._node, 'align-size')
185 if tools.NotPowerOfTwo(self.align_size):
186 self.Raise("Alignment size %s must be a power of two" %
188 self.align_end = fdt_util.GetInt(self._node, 'align-end')
189 self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
190 self.expand_size = fdt_util.GetBool(self._node, 'expand-size')
192 def GetDefaultFilename(self):
196 """Get the device trees used by this entry
199 Empty dict, if this entry is not a .dtb, otherwise:
201 key: Filename from this entry (without the path)
203 Fdt object for this dtb, or None if not available
204 Filename of file containing this dtb
208 def ExpandEntries(self):
211 def AddMissingProperties(self):
212 """Add new properties to the device tree as needed for this entry"""
213 for prop in ['offset', 'size', 'image-pos']:
214 if not prop in self._node.props:
215 state.AddZeroProp(self._node, prop)
216 if self.GetImage().allow_repack:
217 if self.orig_offset is not None:
218 state.AddZeroProp(self._node, 'orig-offset', True)
219 if self.orig_size is not None:
220 state.AddZeroProp(self._node, 'orig-size', True)
222 if self.compress != 'none':
223 state.AddZeroProp(self._node, 'uncomp-size')
224 err = state.CheckAddHashProp(self._node)
228 def SetCalculatedProperties(self):
229 """Set the value of device-tree properties calculated by binman"""
230 state.SetInt(self._node, 'offset', self.offset)
231 state.SetInt(self._node, 'size', self.size)
232 base = self.section.GetRootSkipAtStart() if self.section else 0
233 state.SetInt(self._node, 'image-pos', self.image_pos - base)
234 if self.GetImage().allow_repack:
235 if self.orig_offset is not None:
236 state.SetInt(self._node, 'orig-offset', self.orig_offset, True)
237 if self.orig_size is not None:
238 state.SetInt(self._node, 'orig-size', self.orig_size, True)
239 if self.uncomp_size is not None:
240 state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
241 state.CheckSetHashValue(self._node, self.GetData)
243 def ProcessFdt(self, fdt):
244 """Allow entries to adjust the device tree
246 Some entries need to adjust the device tree for their purposes. This
247 may involve adding or deleting properties.
250 True if processing is complete
251 False if processing could not be completed due to a dependency.
252 This will cause the entry to be retried after others have been
257 def SetPrefix(self, prefix):
258 """Set the name prefix for a node
261 prefix: Prefix to set, or '' to not use a prefix
264 self.name = prefix + self.name
266 def SetContents(self, data):
267 """Set the contents of an entry
269 This sets both the data and content_size properties
272 data: Data to set to the contents (bytes)
275 self.contents_size = len(self.data)
277 def ProcessContentsUpdate(self, data):
278 """Update the contents of an entry, after the size is fixed
280 This checks that the new data is the same size as the old. If the size
281 has changed, this triggers a re-run of the packing algorithm.
284 data: Data to set to the contents (bytes)
287 ValueError if the new data size is not the same as the old
291 if state.AllowEntryExpansion() and new_size > self.contents_size:
292 # self.data will indicate the new size needed
294 elif state.AllowEntryContraction() and new_size < self.contents_size:
297 # If not allowed to change, try to deal with it or give up
299 if new_size > self.contents_size:
300 self.Raise('Cannot update entry size from %d to %d' %
301 (self.contents_size, new_size))
303 # Don't let the data shrink. Pad it if necessary
304 if size_ok and new_size < self.contents_size:
305 data += tools.GetBytes(0, self.contents_size - new_size)
308 tout.Debug("Entry '%s' size change from %s to %s" % (
309 self._node.path, ToHex(self.contents_size),
311 self.SetContents(data)
314 def ObtainContents(self):
315 """Figure out the contents of an entry.
318 True if the contents were found, False if another call is needed
319 after the other entries are processed.
321 # No contents by default: subclasses can implement this
324 def ResetForPack(self):
325 """Reset offset/size fields so that packing can be done again"""
326 self.Detail('ResetForPack: offset %s->%s, size %s->%s' %
327 (ToHex(self.offset), ToHex(self.orig_offset),
328 ToHex(self.size), ToHex(self.orig_size)))
329 self.offset = self.orig_offset
330 self.size = self.orig_size
332 def Pack(self, offset):
333 """Figure out how to pack the entry into the section
335 Most of the time the entries are not fully specified. There may be
336 an alignment but no size. In that case we take the size from the
337 contents of the entry.
339 If an entry has no hard-coded offset, it will be placed at @offset.
341 Once this function is complete, both the offset and size of the
345 Current section offset pointer
348 New section offset pointer (after this entry)
350 self.Detail('Packing: offset=%s, size=%s, content_size=%x' %
351 (ToHex(self.offset), ToHex(self.size),
353 if self.offset is None:
354 if self.offset_unset:
355 self.Raise('No offset set with offset-unset: should another '
356 'entry provide this correct offset?')
357 self.offset = tools.Align(offset, self.align)
358 needed = self.pad_before + self.contents_size + self.pad_after
359 needed = tools.Align(needed, self.align_size)
363 new_offset = self.offset + size
364 aligned_offset = tools.Align(new_offset, self.align_end)
365 if aligned_offset != new_offset:
366 size = aligned_offset - self.offset
367 new_offset = aligned_offset
372 if self.size < needed:
373 self.Raise("Entry contents size is %#x (%d) but entry size is "
374 "%#x (%d)" % (needed, needed, self.size, self.size))
375 # Check that the alignment is correct. It could be wrong if the
376 # and offset or size values were provided (i.e. not calculated), but
377 # conflict with the provided alignment values
378 if self.size != tools.Align(self.size, self.align_size):
379 self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
380 (self.size, self.size, self.align_size, self.align_size))
381 if self.offset != tools.Align(self.offset, self.align):
382 self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
383 (self.offset, self.offset, self.align, self.align))
384 self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' %
385 (self.offset, self.size, self.contents_size, new_offset))
389 def Raise(self, msg):
390 """Convenience function to raise an error referencing a node"""
391 raise ValueError("Node '%s': %s" % (self._node.path, msg))
393 def Detail(self, msg):
394 """Convenience function to log detail referencing a node"""
395 tag = "Node '%s'" % self._node.path
396 tout.Detail('%30s: %s' % (tag, msg))
398 def GetEntryArgsOrProps(self, props, required=False):
399 """Return the values of a set of properties
402 props: List of EntryArg objects
405 ValueError if a property is not found
410 python_prop = prop.name.replace('-', '_')
411 if hasattr(self, python_prop):
412 value = getattr(self, python_prop)
416 value = self.GetArg(prop.name, prop.datatype)
417 if value is None and required:
418 missing.append(prop.name)
421 self.Raise('Missing required properties/entry args: %s' %
422 (', '.join(missing)))
426 """Get the path of a node
429 Full path of the node for this entry
431 return self._node.path
434 self.Detail('GetData: size %s' % ToHexSize(self.data))
437 def GetOffsets(self):
438 """Get the offsets for siblings
440 Some entry types can contain information about the position or size of
441 other entries. An example of this is the Intel Flash Descriptor, which
442 knows where the Intel Management Engine section should go.
444 If this entry knows about the position of other entries, it can specify
445 this by returning values here
450 value: List containing position and size of the given entry
451 type. Either can be None if not known
455 def SetOffsetSize(self, offset, size):
456 """Set the offset and/or size of an entry
459 offset: New offset, or None to leave alone
460 size: New size, or None to leave alone
462 if offset is not None:
467 def SetImagePos(self, image_pos):
468 """Set the position in the image
471 image_pos: Position of this entry in the image
473 self.image_pos = image_pos + self.offset
475 def ProcessContents(self):
476 """Do any post-packing updates of entry contents
478 This function should call ProcessContentsUpdate() to update the entry
479 contents, if necessary, returning its return value here.
482 data: Data to set to the contents (bytes)
485 True if the new data size is OK, False if expansion is needed
488 ValueError if the new data size is not the same as the old and
489 state.AllowEntryExpansion() is False
493 def WriteSymbols(self, section):
494 """Write symbol values into binary files for access at run time
497 section: Section containing the entry
501 def CheckOffset(self):
502 """Check that the entry offsets are correct
504 This is used for entries which have extra offset requirements (other
505 than having to be fully inside their section). Sub-classes can implement
506 this function and raise if there is a problem.
514 return '%08x' % value
517 def WriteMapLine(fd, indent, name, offset, size, image_pos):
518 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
519 Entry.GetStr(offset), Entry.GetStr(size),
522 def WriteMap(self, fd, indent):
523 """Write a map of the entry to a .map file
526 fd: File to write the map to
527 indent: Curent indent level of map (0=none, 1=one level, etc.)
529 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
532 def GetEntries(self):
533 """Return a list of entries contained by this entry
536 List of entries, or None if none. A normal entry has no entries
537 within it so will return None
541 def GetArg(self, name, datatype=str):
542 """Get the value of an entry argument or device-tree-node property
544 Some node properties can be provided as arguments to binman. First check
545 the entry arguments, and fall back to the device tree if not found
549 datatype: Data type (str or int)
552 Value of argument as a string or int, or None if no value
555 ValueError if the argument cannot be converted to in
557 value = state.GetEntryArg(name)
558 if value is not None:
563 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
565 elif datatype == str:
568 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
571 value = fdt_util.GetDatatype(self._node, name, datatype)
575 def WriteDocs(modules, test_missing=None):
576 """Write out documentation about the various entry types to stdout
579 modules: List of modules to include
580 test_missing: Used for testing. This is a module to report
583 print('''Binman Entry Documentation
584 ===========================
586 This file describes the entry types supported by binman. These entry types can
587 be placed in an image one by one to build up a final firmware image. It is
588 fairly easy to create new entry types. Just add a new file to the 'etype'
589 directory. You can use the existing entries as examples.
591 Note that some entries are subclasses of others, using and extending their
592 features to produce new behaviours.
596 modules = sorted(modules)
598 # Don't show the test entry
599 if '_testing' in modules:
600 modules.remove('_testing')
603 if name.startswith('__'):
605 module = Entry.Lookup(name, name)
606 docs = getattr(module, '__doc__')
607 if test_missing == name:
610 lines = docs.splitlines()
611 first_line = lines[0]
612 rest = [line[4:] for line in lines[1:]]
613 hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
615 print('-' * len(hdr))
616 print('\n'.join(rest))
623 raise ValueError('Documentation is missing for modules: %s' %
626 def GetUniqueName(self):
627 """Get a unique name for a node
630 String containing a unique name for a node, consisting of the name
631 of all ancestors (starting from within the 'binman' node) separated
632 by a dot ('.'). This can be useful for generating unique filesnames
633 in the output directory.
639 if node.name == 'binman':
641 name = '%s.%s' % (node.name, name)
644 def ExpandToLimit(self, limit):
645 """Expand an entry so that it ends at the given offset limit"""
646 if self.offset + self.size < limit:
647 self.size = limit - self.offset
648 # Request the contents again, since changing the size requires that
649 # the data grows. This should not fail, but check it to be sure.
650 if not self.ObtainContents():
651 self.Raise('Cannot obtain contents when expanding entry')
653 def HasSibling(self, name):
654 """Check if there is a sibling of a given name
657 True if there is an entry with this name in the the same section,
660 return name in self.section.GetEntries()
662 def GetSiblingImagePos(self, name):
663 """Return the image position of the given sibling
666 Image position of sibling, or None if the sibling has no position,
667 or False if there is no such sibling
669 if not self.HasSibling(name):
671 return self.section.GetEntries()[name].image_pos
674 def AddEntryInfo(entries, indent, name, etype, size, image_pos,
675 uncomp_size, offset, entry):
676 """Add a new entry to the entries list
679 entries: List (of EntryInfo objects) to add to
680 indent: Current indent level to add to list
681 name: Entry name (string)
682 etype: Entry type (string)
683 size: Entry size in bytes (int)
684 image_pos: Position within image in bytes (int)
685 uncomp_size: Uncompressed size if the entry uses compression, else
687 offset: Entry offset within parent in bytes (int)
690 entries.append(EntryInfo(indent, name, etype, size, image_pos,
691 uncomp_size, offset, entry))
693 def ListEntries(self, entries, indent):
694 """Add files in this entry to the list of entries
696 This can be overridden by subclasses which need different behaviour.
699 entries: List (of EntryInfo objects) to add to
700 indent: Current indent level to add to list
702 self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
703 self.image_pos, self.uncomp_size, self.offset, self)
705 def ReadData(self, decomp=True):
706 """Read the data for an entry from the image
708 This is used when the image has been read in and we want to extract the
709 data for a particular entry from that image.
712 decomp: True to decompress any compressed data before returning it;
713 False to return the raw, uncompressed data
718 # Use True here so that we get an uncompressed section to work from,
719 # although compressed sections are currently not supported
720 tout.Debug("ReadChildData section '%s', entry '%s'" %
721 (self.section.GetPath(), self.GetPath()))
722 data = self.section.ReadChildData(self, decomp)
725 def ReadChildData(self, child, decomp=True):
726 """Read the data for a particular child entry
728 This reads data from the parent and extracts the piece that relates to
732 child: Child entry to read data for (must be valid)
733 decomp: True to decompress any compressed data before returning it;
734 False to return the raw, uncompressed data
737 Data for the child (bytes)
741 def LoadData(self, decomp=True):
742 data = self.ReadData(decomp)
743 self.contents_size = len(data)
744 self.ProcessContentsUpdate(data)
745 self.Detail('Loaded data size %x' % len(data))
748 """Get the image containing this entry
751 Image object containing this entry
753 return self.section.GetImage()
755 def WriteData(self, data, decomp=True):
756 """Write the data to an entry in the image
758 This is used when the image has been read in and we want to replace the
759 data for a particular entry in that image.
761 The image must be re-packed and written out afterwards.
764 data: Data to replace it with
765 decomp: True to compress the data if needed, False if data is
766 already compressed so should be used as is
769 True if the data did not result in a resize of this entry, False if
770 the entry must be resized
772 self.contents_size = self.size
773 ok = self.ProcessContentsUpdate(data)
774 self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
775 section_ok = self.section.WriteChildData(self)
776 return ok and section_ok
778 def WriteChildData(self, child):
779 """Handle writing the data in a child entry
781 This should be called on the child's parent section after the child's
782 data has been updated. It
784 This base-class implementation does nothing, since the base Entry object
785 does not have any children.
788 child: Child Entry that was written
791 True if the section could be updated successfully, False if the
792 data is such that the section could not updat
796 def GetSiblingOrder(self):
797 """Get the relative order of an entry amoung its siblings
800 'start' if this entry is first among siblings, 'end' if last,
803 entries = list(self.section.GetEntries().values())
805 if self == entries[0]:
807 elif self == entries[-1]: