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
64 compress: Compression algoithm used (e.g. 'lz4'), 'none' if none
65 orig_offset: Original offset value read from node
66 orig_size: Original size value read from node
67 missing: True if this entry is missing its contents
68 allow_missing: Allow children of this entry to be missing (used by
69 subclasses such as Entry_section)
70 external: True if this entry contains an external binary blob
72 def __init__(self, section, etype, node, name_prefix=''):
73 # Put this here to allow entry-docs and help to work without libfdt
75 from binman import state
77 self.section = section
80 self.name = node and (name_prefix + node.name) or 'none'
83 self.pre_reset_size = None
84 self.uncomp_size = None
86 self.contents_size = 0
88 self.align_size = None
92 self.offset_unset = False
94 self._expand_size = False
95 self.compress = 'none'
98 self.allow_missing = False
101 def Lookup(node_path, etype):
102 """Look up the entry class for a node.
105 node_node: Path name of Node object containing information about
106 the entry to create (used for errors)
107 etype: Entry type to use
110 The entry class object if found, else None
112 # Convert something like 'u-boot@0' to 'u_boot' since we are only
113 # interested in the type.
114 module_name = etype.replace('-', '_')
115 if '@' in module_name:
116 module_name = module_name.split('@')[0]
117 module = modules.get(module_name)
119 # Also allow entry-type modules to be brought in from the etype directory.
121 # Import the module if we have not already done so.
124 module = importlib.import_module('binman.etype.' + module_name)
125 except ImportError as e:
126 raise ValueError("Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
127 (etype, node_path, module_name, e))
128 modules[module_name] = module
130 # Look up the expected class name
131 return getattr(module, 'Entry_%s' % module_name)
134 def Create(section, node, etype=None):
135 """Create a new entry for a node.
138 section: Section object containing this node
139 node: Node object containing information about the entry to
141 etype: Entry type to use, or None to work it out (used for tests)
144 A new Entry object of the correct type (a subclass of Entry)
147 etype = fdt_util.GetString(node, 'type', node.name)
148 obj = Entry.Lookup(node.path, etype)
150 # Call its constructor to get the object we want.
151 return obj(section, etype, node)
154 """Read entry information from the node
156 This must be called as the first thing after the Entry is created.
158 This reads all the fields we recognise from the node, ready for use.
160 if 'pos' in self._node.props:
161 self.Raise("Please use 'offset' instead of 'pos'")
162 self.offset = fdt_util.GetInt(self._node, 'offset')
163 self.size = fdt_util.GetInt(self._node, 'size')
164 self.orig_offset = fdt_util.GetInt(self._node, 'orig-offset')
165 self.orig_size = fdt_util.GetInt(self._node, 'orig-size')
166 if self.GetImage().copy_to_orig:
167 self.orig_offset = self.offset
168 self.orig_size = self.size
170 # These should not be set in input files, but are set in an FDT map,
171 # which is also read by this code.
172 self.image_pos = fdt_util.GetInt(self._node, 'image-pos')
173 self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size')
175 self.align = fdt_util.GetInt(self._node, 'align')
176 if tools.NotPowerOfTwo(self.align):
177 raise ValueError("Node '%s': Alignment %s must be a power of two" %
178 (self._node.path, self.align))
179 self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0)
180 self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0)
181 self.align_size = fdt_util.GetInt(self._node, 'align-size')
182 if tools.NotPowerOfTwo(self.align_size):
183 self.Raise("Alignment size %s must be a power of two" %
185 self.align_end = fdt_util.GetInt(self._node, 'align-end')
186 self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
187 self.expand_size = fdt_util.GetBool(self._node, 'expand-size')
188 self.missing_msg = fdt_util.GetString(self._node, 'missing-msg')
190 # This is only supported by blobs and sections at present
191 self.compress = fdt_util.GetString(self._node, 'compress', 'none')
193 def GetDefaultFilename(self):
197 """Get the device trees used by this entry
200 Empty dict, if this entry is not a .dtb, otherwise:
202 key: Filename from this entry (without the path)
204 Fdt object for this dtb, or None if not available
205 Filename of file containing this dtb
209 def ExpandEntries(self):
212 def AddMissingProperties(self):
213 """Add new properties to the device tree as needed for this entry"""
214 for prop in ['offset', 'size', 'image-pos']:
215 if not prop in self._node.props:
216 state.AddZeroProp(self._node, prop)
217 if self.GetImage().allow_repack:
218 if self.orig_offset is not None:
219 state.AddZeroProp(self._node, 'orig-offset', True)
220 if self.orig_size is not None:
221 state.AddZeroProp(self._node, 'orig-size', True)
223 if self.compress != 'none':
224 state.AddZeroProp(self._node, 'uncomp-size')
225 err = state.CheckAddHashProp(self._node)
229 def SetCalculatedProperties(self):
230 """Set the value of device-tree properties calculated by binman"""
231 state.SetInt(self._node, 'offset', self.offset)
232 state.SetInt(self._node, 'size', self.size)
233 base = self.section.GetRootSkipAtStart() if self.section else 0
234 state.SetInt(self._node, 'image-pos', self.image_pos - base)
235 if self.GetImage().allow_repack:
236 if self.orig_offset is not None:
237 state.SetInt(self._node, 'orig-offset', self.orig_offset, True)
238 if self.orig_size is not None:
239 state.SetInt(self._node, 'orig-size', self.orig_size, True)
240 if self.uncomp_size is not None:
241 state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
242 state.CheckSetHashValue(self._node, self.GetData)
244 def ProcessFdt(self, fdt):
245 """Allow entries to adjust the device tree
247 Some entries need to adjust the device tree for their purposes. This
248 may involve adding or deleting properties.
251 True if processing is complete
252 False if processing could not be completed due to a dependency.
253 This will cause the entry to be retried after others have been
258 def SetPrefix(self, prefix):
259 """Set the name prefix for a node
262 prefix: Prefix to set, or '' to not use a prefix
265 self.name = prefix + self.name
267 def SetContents(self, data):
268 """Set the contents of an entry
270 This sets both the data and content_size properties
273 data: Data to set to the contents (bytes)
276 self.contents_size = len(self.data)
278 def ProcessContentsUpdate(self, data):
279 """Update the contents of an entry, after the size is fixed
281 This checks that the new data is the same size as the old. If the size
282 has changed, this triggers a re-run of the packing algorithm.
285 data: Data to set to the contents (bytes)
288 ValueError if the new data size is not the same as the old
292 if state.AllowEntryExpansion() and new_size > self.contents_size:
293 # self.data will indicate the new size needed
295 elif state.AllowEntryContraction() and new_size < self.contents_size:
298 # If not allowed to change, try to deal with it or give up
300 if new_size > self.contents_size:
301 self.Raise('Cannot update entry size from %d to %d' %
302 (self.contents_size, new_size))
304 # Don't let the data shrink. Pad it if necessary
305 if size_ok and new_size < self.contents_size:
306 data += tools.GetBytes(0, self.contents_size - new_size)
309 tout.Debug("Entry '%s' size change from %s to %s" % (
310 self._node.path, ToHex(self.contents_size),
312 self.SetContents(data)
315 def ObtainContents(self):
316 """Figure out the contents of an entry.
319 True if the contents were found, False if another call is needed
320 after the other entries are processed.
322 # No contents by default: subclasses can implement this
325 def ResetForPack(self):
326 """Reset offset/size fields so that packing can be done again"""
327 self.Detail('ResetForPack: offset %s->%s, size %s->%s' %
328 (ToHex(self.offset), ToHex(self.orig_offset),
329 ToHex(self.size), ToHex(self.orig_size)))
330 self.pre_reset_size = self.size
331 self.offset = self.orig_offset
332 self.size = self.orig_size
334 def Pack(self, offset):
335 """Figure out how to pack the entry into the section
337 Most of the time the entries are not fully specified. There may be
338 an alignment but no size. In that case we take the size from the
339 contents of the entry.
341 If an entry has no hard-coded offset, it will be placed at @offset.
343 Once this function is complete, both the offset and size of the
347 Current section offset pointer
350 New section offset pointer (after this entry)
352 self.Detail('Packing: offset=%s, size=%s, content_size=%x' %
353 (ToHex(self.offset), ToHex(self.size),
355 if self.offset is None:
356 if self.offset_unset:
357 self.Raise('No offset set with offset-unset: should another '
358 'entry provide this correct offset?')
359 self.offset = tools.Align(offset, self.align)
360 needed = self.pad_before + self.contents_size + self.pad_after
361 needed = tools.Align(needed, self.align_size)
365 new_offset = self.offset + size
366 aligned_offset = tools.Align(new_offset, self.align_end)
367 if aligned_offset != new_offset:
368 size = aligned_offset - self.offset
369 new_offset = aligned_offset
374 if self.size < needed:
375 self.Raise("Entry contents size is %#x (%d) but entry size is "
376 "%#x (%d)" % (needed, needed, self.size, self.size))
377 # Check that the alignment is correct. It could be wrong if the
378 # and offset or size values were provided (i.e. not calculated), but
379 # conflict with the provided alignment values
380 if self.size != tools.Align(self.size, self.align_size):
381 self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
382 (self.size, self.size, self.align_size, self.align_size))
383 if self.offset != tools.Align(self.offset, self.align):
384 self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
385 (self.offset, self.offset, self.align, self.align))
386 self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' %
387 (self.offset, self.size, self.contents_size, new_offset))
391 def Raise(self, msg):
392 """Convenience function to raise an error referencing a node"""
393 raise ValueError("Node '%s': %s" % (self._node.path, msg))
395 def Detail(self, msg):
396 """Convenience function to log detail referencing a node"""
397 tag = "Node '%s'" % self._node.path
398 tout.Detail('%30s: %s' % (tag, msg))
400 def GetEntryArgsOrProps(self, props, required=False):
401 """Return the values of a set of properties
404 props: List of EntryArg objects
407 ValueError if a property is not found
412 python_prop = prop.name.replace('-', '_')
413 if hasattr(self, python_prop):
414 value = getattr(self, python_prop)
418 value = self.GetArg(prop.name, prop.datatype)
419 if value is None and required:
420 missing.append(prop.name)
423 self.Raise('Missing required properties/entry args: %s' %
424 (', '.join(missing)))
428 """Get the path of a node
431 Full path of the node for this entry
433 return self._node.path
436 self.Detail('GetData: size %s' % ToHexSize(self.data))
439 def GetOffsets(self):
440 """Get the offsets for siblings
442 Some entry types can contain information about the position or size of
443 other entries. An example of this is the Intel Flash Descriptor, which
444 knows where the Intel Management Engine section should go.
446 If this entry knows about the position of other entries, it can specify
447 this by returning values here
452 value: List containing position and size of the given entry
453 type. Either can be None if not known
457 def SetOffsetSize(self, offset, size):
458 """Set the offset and/or size of an entry
461 offset: New offset, or None to leave alone
462 size: New size, or None to leave alone
464 if offset is not None:
469 def SetImagePos(self, image_pos):
470 """Set the position in the image
473 image_pos: Position of this entry in the image
475 self.image_pos = image_pos + self.offset
477 def ProcessContents(self):
478 """Do any post-packing updates of entry contents
480 This function should call ProcessContentsUpdate() to update the entry
481 contents, if necessary, returning its return value here.
484 data: Data to set to the contents (bytes)
487 True if the new data size is OK, False if expansion is needed
490 ValueError if the new data size is not the same as the old and
491 state.AllowEntryExpansion() is False
495 def WriteSymbols(self, section):
496 """Write symbol values into binary files for access at run time
499 section: Section containing the entry
503 def CheckOffset(self):
504 """Check that the entry offsets are correct
506 This is used for entries which have extra offset requirements (other
507 than having to be fully inside their section). Sub-classes can implement
508 this function and raise if there is a problem.
516 return '%08x' % value
519 def WriteMapLine(fd, indent, name, offset, size, image_pos):
520 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
521 Entry.GetStr(offset), Entry.GetStr(size),
524 def WriteMap(self, fd, indent):
525 """Write a map of the entry to a .map file
528 fd: File to write the map to
529 indent: Curent indent level of map (0=none, 1=one level, etc.)
531 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
534 def GetEntries(self):
535 """Return a list of entries contained by this entry
538 List of entries, or None if none. A normal entry has no entries
539 within it so will return None
543 def GetArg(self, name, datatype=str):
544 """Get the value of an entry argument or device-tree-node property
546 Some node properties can be provided as arguments to binman. First check
547 the entry arguments, and fall back to the device tree if not found
551 datatype: Data type (str or int)
554 Value of argument as a string or int, or None if no value
557 ValueError if the argument cannot be converted to in
559 value = state.GetEntryArg(name)
560 if value is not None:
565 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
567 elif datatype == str:
570 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
573 value = fdt_util.GetDatatype(self._node, name, datatype)
577 def WriteDocs(modules, test_missing=None):
578 """Write out documentation about the various entry types to stdout
581 modules: List of modules to include
582 test_missing: Used for testing. This is a module to report
585 print('''Binman Entry Documentation
586 ===========================
588 This file describes the entry types supported by binman. These entry types can
589 be placed in an image one by one to build up a final firmware image. It is
590 fairly easy to create new entry types. Just add a new file to the 'etype'
591 directory. You can use the existing entries as examples.
593 Note that some entries are subclasses of others, using and extending their
594 features to produce new behaviours.
598 modules = sorted(modules)
600 # Don't show the test entry
601 if '_testing' in modules:
602 modules.remove('_testing')
605 module = Entry.Lookup('WriteDocs', 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 if self.size is not None:
773 self.contents_size = self.size
775 self.contents_size = self.pre_reset_size
776 ok = self.ProcessContentsUpdate(data)
777 self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
778 section_ok = self.section.WriteChildData(self)
779 return ok and section_ok
781 def WriteChildData(self, child):
782 """Handle writing the data in a child entry
784 This should be called on the child's parent section after the child's
785 data has been updated. It
787 This base-class implementation does nothing, since the base Entry object
788 does not have any children.
791 child: Child Entry that was written
794 True if the section could be updated successfully, False if the
795 data is such that the section could not updat
799 def GetSiblingOrder(self):
800 """Get the relative order of an entry amoung its siblings
803 'start' if this entry is first among siblings, 'end' if last,
806 entries = list(self.section.GetEntries().values())
808 if self == entries[0]:
810 elif self == entries[-1]:
814 def SetAllowMissing(self, allow_missing):
815 """Set whether a section allows missing external blobs
818 allow_missing: True if allowed, False if not allowed
820 # This is meaningless for anything other than sections
823 def CheckMissing(self, missing_list):
824 """Check if any entries in this section have missing external blobs
826 If there are missing blobs, the entries are added to the list
829 missing_list: List of Entry objects to be added to
832 missing_list.append(self)
834 def GetAllowMissing(self):
835 """Get whether a section allows missing external blobs
838 True if allowed, False if not allowed
840 return self.allow_missing
842 def GetHelpTags(self):
843 """Get the tags use for missing-blob help
846 list of possible tags, most desirable first
848 return list(filter(None, [self.missing_msg, self.name, self.etype]))
850 def CompressData(self, indata):
851 """Compress data according to the entry's compression method
854 indata: Data to compress
857 Compressed data (first word is the compressed size)
859 if self.compress != 'none':
860 self.uncomp_size = len(indata)
861 data = tools.Compress(indata, self.compress)