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
16 from tools import ToHex, ToHexSize
21 our_path = os.path.dirname(os.path.realpath(__file__))
24 # An argument which can be passed to entries on the command line, in lieu of
25 # device-tree properties.
26 EntryArg = namedtuple('EntryArg', ['name', 'datatype'])
28 # Information about an entry for use when displaying summaries
29 EntryInfo = namedtuple('EntryInfo', ['indent', 'name', 'etype', 'size',
30 'image_pos', 'uncomp_size', 'offset',
34 """An Entry in the section
36 An entry corresponds to a single node in the device-tree description
37 of the section. Each entry ends up being a part of the final section.
38 Entries can be placed either right next to each other, or with padding
39 between them. The type of the entry determines the data that is in it.
41 This class is not used by itself. All entry objects are subclasses of
45 section: Section object containing this entry
46 node: The node that created this entry
47 offset: Offset of entry within the section, None if not known yet (in
48 which case it will be calculated by Pack())
49 size: Entry size in bytes, None if not known
50 uncomp_size: Size of uncompressed data in bytes, if the entry is
52 contents_size: Size of contents in bytes, 0 by default
53 align: Entry start offset alignment, or None
54 align_size: Entry size alignment, or None
55 align_end: Entry end offset alignment, or None
56 pad_before: Number of pad bytes before the contents, 0 if none
57 pad_after: Number of pad bytes after the contents, 0 if none
58 data: Contents of entry (string of bytes)
59 compress: Compression algoithm used (e.g. 'lz4'), 'none' if none
60 orig_offset: Original offset value read from node
61 orig_size: Original size value read from node
63 def __init__(self, section, etype, node, name_prefix=''):
64 # Put this here to allow entry-docs and help to work without libfdt
68 self.section = section
71 self.name = node and (name_prefix + node.name) or 'none'
74 self.uncomp_size = None
76 self.contents_size = 0
78 self.align_size = None
82 self.offset_unset = False
84 self._expand_size = False
85 self.compress = 'none'
88 def Lookup(node_path, etype):
89 """Look up the entry class for a node.
92 node_node: Path name of Node object containing information about
93 the entry to create (used for errors)
94 etype: Entry type to use
97 The entry class object if found, else None
99 # Convert something like 'u-boot@0' to 'u_boot' since we are only
100 # interested in the type.
101 module_name = etype.replace('-', '_')
102 if '@' in module_name:
103 module_name = module_name.split('@')[0]
104 module = modules.get(module_name)
106 # Also allow entry-type modules to be brought in from the etype directory.
108 # Import the module if we have not already done so.
111 sys.path.insert(0, os.path.join(our_path, 'etype'))
113 module = importlib.import_module(module_name)
114 except ImportError as e:
115 raise ValueError("Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
116 (etype, node_path, module_name, e))
119 modules[module_name] = module
121 # Look up the expected class name
122 return getattr(module, 'Entry_%s' % module_name)
125 def Create(section, node, etype=None):
126 """Create a new entry for a node.
129 section: Section object containing this node
130 node: Node object containing information about the entry to
132 etype: Entry type to use, or None to work it out (used for tests)
135 A new Entry object of the correct type (a subclass of Entry)
138 etype = fdt_util.GetString(node, 'type', node.name)
139 obj = Entry.Lookup(node.path, etype)
141 # Call its constructor to get the object we want.
142 return obj(section, etype, node)
145 """Read entry information from the node
147 This must be called as the first thing after the Entry is created.
149 This reads all the fields we recognise from the node, ready for use.
151 if 'pos' in self._node.props:
152 self.Raise("Please use 'offset' instead of 'pos'")
153 self.offset = fdt_util.GetInt(self._node, 'offset')
154 self.size = fdt_util.GetInt(self._node, 'size')
155 self.orig_offset = fdt_util.GetInt(self._node, 'orig-offset')
156 self.orig_size = fdt_util.GetInt(self._node, 'orig-size')
157 if self.GetImage().copy_to_orig:
158 self.orig_offset = self.offset
159 self.orig_size = self.size
161 # These should not be set in input files, but are set in an FDT map,
162 # which is also read by this code.
163 self.image_pos = fdt_util.GetInt(self._node, 'image-pos')
164 self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size')
166 self.align = fdt_util.GetInt(self._node, 'align')
167 if tools.NotPowerOfTwo(self.align):
168 raise ValueError("Node '%s': Alignment %s must be a power of two" %
169 (self._node.path, self.align))
170 self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0)
171 self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0)
172 self.align_size = fdt_util.GetInt(self._node, 'align-size')
173 if tools.NotPowerOfTwo(self.align_size):
174 self.Raise("Alignment size %s must be a power of two" %
176 self.align_end = fdt_util.GetInt(self._node, 'align-end')
177 self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
178 self.expand_size = fdt_util.GetBool(self._node, 'expand-size')
180 def GetDefaultFilename(self):
184 """Get the device trees used by this entry
187 Empty dict, if this entry is not a .dtb, otherwise:
189 key: Filename from this entry (without the path)
191 Fdt object for this dtb, or None if not available
192 Filename of file containing this dtb
196 def ExpandEntries(self):
199 def AddMissingProperties(self):
200 """Add new properties to the device tree as needed for this entry"""
201 for prop in ['offset', 'size', 'image-pos']:
202 if not prop in self._node.props:
203 state.AddZeroProp(self._node, prop)
204 if self.GetImage().allow_repack:
205 if self.orig_offset is not None:
206 state.AddZeroProp(self._node, 'orig-offset', True)
207 if self.orig_size is not None:
208 state.AddZeroProp(self._node, 'orig-size', True)
210 if self.compress != 'none':
211 state.AddZeroProp(self._node, 'uncomp-size')
212 err = state.CheckAddHashProp(self._node)
216 def SetCalculatedProperties(self):
217 """Set the value of device-tree properties calculated by binman"""
218 state.SetInt(self._node, 'offset', self.offset)
219 state.SetInt(self._node, 'size', self.size)
220 base = self.section.GetRootSkipAtStart() if self.section else 0
221 state.SetInt(self._node, 'image-pos', self.image_pos - base)
222 if self.GetImage().allow_repack:
223 if self.orig_offset is not None:
224 state.SetInt(self._node, 'orig-offset', self.orig_offset, True)
225 if self.orig_size is not None:
226 state.SetInt(self._node, 'orig-size', self.orig_size, True)
227 if self.uncomp_size is not None:
228 state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
229 state.CheckSetHashValue(self._node, self.GetData)
231 def ProcessFdt(self, fdt):
232 """Allow entries to adjust the device tree
234 Some entries need to adjust the device tree for their purposes. This
235 may involve adding or deleting properties.
238 True if processing is complete
239 False if processing could not be completed due to a dependency.
240 This will cause the entry to be retried after others have been
245 def SetPrefix(self, prefix):
246 """Set the name prefix for a node
249 prefix: Prefix to set, or '' to not use a prefix
252 self.name = prefix + self.name
254 def SetContents(self, data):
255 """Set the contents of an entry
257 This sets both the data and content_size properties
260 data: Data to set to the contents (bytes)
263 self.contents_size = len(self.data)
265 def ProcessContentsUpdate(self, data):
266 """Update the contents of an entry, after the size is fixed
268 This checks that the new data is the same size as the old. If the size
269 has changed, this triggers a re-run of the packing algorithm.
272 data: Data to set to the contents (bytes)
275 ValueError if the new data size is not the same as the old
279 if state.AllowEntryExpansion() and new_size > self.contents_size:
280 # self.data will indicate the new size needed
282 elif state.AllowEntryContraction() and new_size < self.contents_size:
285 # If not allowed to change, try to deal with it or give up
287 if new_size > self.contents_size:
288 self.Raise('Cannot update entry size from %d to %d' %
289 (self.contents_size, new_size))
291 # Don't let the data shrink. Pad it if necessary
292 if size_ok and new_size < self.contents_size:
293 data += tools.GetBytes(0, self.contents_size - new_size)
296 tout.Debug("Entry '%s' size change from %s to %s" % (
297 self._node.path, ToHex(self.contents_size),
299 self.SetContents(data)
302 def ObtainContents(self):
303 """Figure out the contents of an entry.
306 True if the contents were found, False if another call is needed
307 after the other entries are processed.
309 # No contents by default: subclasses can implement this
312 def ResetForPack(self):
313 """Reset offset/size fields so that packing can be done again"""
314 self.Detail('ResetForPack: offset %s->%s, size %s->%s' %
315 (ToHex(self.offset), ToHex(self.orig_offset),
316 ToHex(self.size), ToHex(self.orig_size)))
317 self.offset = self.orig_offset
318 self.size = self.orig_size
320 def Pack(self, offset):
321 """Figure out how to pack the entry into the section
323 Most of the time the entries are not fully specified. There may be
324 an alignment but no size. In that case we take the size from the
325 contents of the entry.
327 If an entry has no hard-coded offset, it will be placed at @offset.
329 Once this function is complete, both the offset and size of the
333 Current section offset pointer
336 New section offset pointer (after this entry)
338 self.Detail('Packing: offset=%s, size=%s, content_size=%x' %
339 (ToHex(self.offset), ToHex(self.size),
341 if self.offset is None:
342 if self.offset_unset:
343 self.Raise('No offset set with offset-unset: should another '
344 'entry provide this correct offset?')
345 self.offset = tools.Align(offset, self.align)
346 needed = self.pad_before + self.contents_size + self.pad_after
347 needed = tools.Align(needed, self.align_size)
351 new_offset = self.offset + size
352 aligned_offset = tools.Align(new_offset, self.align_end)
353 if aligned_offset != new_offset:
354 size = aligned_offset - self.offset
355 new_offset = aligned_offset
360 if self.size < needed:
361 self.Raise("Entry contents size is %#x (%d) but entry size is "
362 "%#x (%d)" % (needed, needed, self.size, self.size))
363 # Check that the alignment is correct. It could be wrong if the
364 # and offset or size values were provided (i.e. not calculated), but
365 # conflict with the provided alignment values
366 if self.size != tools.Align(self.size, self.align_size):
367 self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
368 (self.size, self.size, self.align_size, self.align_size))
369 if self.offset != tools.Align(self.offset, self.align):
370 self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
371 (self.offset, self.offset, self.align, self.align))
372 self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' %
373 (self.offset, self.size, self.contents_size, new_offset))
377 def Raise(self, msg):
378 """Convenience function to raise an error referencing a node"""
379 raise ValueError("Node '%s': %s" % (self._node.path, msg))
381 def Detail(self, msg):
382 """Convenience function to log detail referencing a node"""
383 tag = "Node '%s'" % self._node.path
384 tout.Detail('%30s: %s' % (tag, msg))
386 def GetEntryArgsOrProps(self, props, required=False):
387 """Return the values of a set of properties
390 props: List of EntryArg objects
393 ValueError if a property is not found
398 python_prop = prop.name.replace('-', '_')
399 if hasattr(self, python_prop):
400 value = getattr(self, python_prop)
404 value = self.GetArg(prop.name, prop.datatype)
405 if value is None and required:
406 missing.append(prop.name)
409 self.Raise('Missing required properties/entry args: %s' %
410 (', '.join(missing)))
414 """Get the path of a node
417 Full path of the node for this entry
419 return self._node.path
422 self.Detail('GetData: size %s' % ToHexSize(self.data))
425 def GetOffsets(self):
426 """Get the offsets for siblings
428 Some entry types can contain information about the position or size of
429 other entries. An example of this is the Intel Flash Descriptor, which
430 knows where the Intel Management Engine section should go.
432 If this entry knows about the position of other entries, it can specify
433 this by returning values here
438 value: List containing position and size of the given entry
439 type. Either can be None if not known
443 def SetOffsetSize(self, offset, size):
444 """Set the offset and/or size of an entry
447 offset: New offset, or None to leave alone
448 size: New size, or None to leave alone
450 if offset is not None:
455 def SetImagePos(self, image_pos):
456 """Set the position in the image
459 image_pos: Position of this entry in the image
461 self.image_pos = image_pos + self.offset
463 def ProcessContents(self):
464 """Do any post-packing updates of entry contents
466 This function should call ProcessContentsUpdate() to update the entry
467 contents, if necessary, returning its return value here.
470 data: Data to set to the contents (bytes)
473 True if the new data size is OK, False if expansion is needed
476 ValueError if the new data size is not the same as the old and
477 state.AllowEntryExpansion() is False
481 def WriteSymbols(self, section):
482 """Write symbol values into binary files for access at run time
485 section: Section containing the entry
489 def CheckOffset(self):
490 """Check that the entry offsets are correct
492 This is used for entries which have extra offset requirements (other
493 than having to be fully inside their section). Sub-classes can implement
494 this function and raise if there is a problem.
502 return '%08x' % value
505 def WriteMapLine(fd, indent, name, offset, size, image_pos):
506 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
507 Entry.GetStr(offset), Entry.GetStr(size),
510 def WriteMap(self, fd, indent):
511 """Write a map of the entry to a .map file
514 fd: File to write the map to
515 indent: Curent indent level of map (0=none, 1=one level, etc.)
517 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
520 def GetEntries(self):
521 """Return a list of entries contained by this entry
524 List of entries, or None if none. A normal entry has no entries
525 within it so will return None
529 def GetArg(self, name, datatype=str):
530 """Get the value of an entry argument or device-tree-node property
532 Some node properties can be provided as arguments to binman. First check
533 the entry arguments, and fall back to the device tree if not found
537 datatype: Data type (str or int)
540 Value of argument as a string or int, or None if no value
543 ValueError if the argument cannot be converted to in
545 value = state.GetEntryArg(name)
546 if value is not None:
551 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
553 elif datatype == str:
556 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
559 value = fdt_util.GetDatatype(self._node, name, datatype)
563 def WriteDocs(modules, test_missing=None):
564 """Write out documentation about the various entry types to stdout
567 modules: List of modules to include
568 test_missing: Used for testing. This is a module to report
571 print('''Binman Entry Documentation
572 ===========================
574 This file describes the entry types supported by binman. These entry types can
575 be placed in an image one by one to build up a final firmware image. It is
576 fairly easy to create new entry types. Just add a new file to the 'etype'
577 directory. You can use the existing entries as examples.
579 Note that some entries are subclasses of others, using and extending their
580 features to produce new behaviours.
584 modules = sorted(modules)
586 # Don't show the test entry
587 if '_testing' in modules:
588 modules.remove('_testing')
591 if name.startswith('__'):
593 module = Entry.Lookup(name, name)
594 docs = getattr(module, '__doc__')
595 if test_missing == name:
598 lines = docs.splitlines()
599 first_line = lines[0]
600 rest = [line[4:] for line in lines[1:]]
601 hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
603 print('-' * len(hdr))
604 print('\n'.join(rest))
611 raise ValueError('Documentation is missing for modules: %s' %
614 def GetUniqueName(self):
615 """Get a unique name for a node
618 String containing a unique name for a node, consisting of the name
619 of all ancestors (starting from within the 'binman' node) separated
620 by a dot ('.'). This can be useful for generating unique filesnames
621 in the output directory.
627 if node.name == 'binman':
629 name = '%s.%s' % (node.name, name)
632 def ExpandToLimit(self, limit):
633 """Expand an entry so that it ends at the given offset limit"""
634 if self.offset + self.size < limit:
635 self.size = limit - self.offset
636 # Request the contents again, since changing the size requires that
637 # the data grows. This should not fail, but check it to be sure.
638 if not self.ObtainContents():
639 self.Raise('Cannot obtain contents when expanding entry')
641 def HasSibling(self, name):
642 """Check if there is a sibling of a given name
645 True if there is an entry with this name in the the same section,
648 return name in self.section.GetEntries()
650 def GetSiblingImagePos(self, name):
651 """Return the image position of the given sibling
654 Image position of sibling, or None if the sibling has no position,
655 or False if there is no such sibling
657 if not self.HasSibling(name):
659 return self.section.GetEntries()[name].image_pos
662 def AddEntryInfo(entries, indent, name, etype, size, image_pos,
663 uncomp_size, offset, entry):
664 """Add a new entry to the entries list
667 entries: List (of EntryInfo objects) to add to
668 indent: Current indent level to add to list
669 name: Entry name (string)
670 etype: Entry type (string)
671 size: Entry size in bytes (int)
672 image_pos: Position within image in bytes (int)
673 uncomp_size: Uncompressed size if the entry uses compression, else
675 offset: Entry offset within parent in bytes (int)
678 entries.append(EntryInfo(indent, name, etype, size, image_pos,
679 uncomp_size, offset, entry))
681 def ListEntries(self, entries, indent):
682 """Add files in this entry to the list of entries
684 This can be overridden by subclasses which need different behaviour.
687 entries: List (of EntryInfo objects) to add to
688 indent: Current indent level to add to list
690 self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
691 self.image_pos, self.uncomp_size, self.offset, self)
693 def ReadData(self, decomp=True):
694 """Read the data for an entry from the image
696 This is used when the image has been read in and we want to extract the
697 data for a particular entry from that image.
700 decomp: True to decompress any compressed data before returning it;
701 False to return the raw, uncompressed data
706 # Use True here so that we get an uncompressed section to work from,
707 # although compressed sections are currently not supported
708 tout.Debug("ReadChildData section '%s', entry '%s'" %
709 (self.section.GetPath(), self.GetPath()))
710 data = self.section.ReadChildData(self, decomp)
713 def ReadChildData(self, child, decomp=True):
714 """Read the data for a particular child entry
716 This reads data from the parent and extracts the piece that relates to
720 child: Child entry to read data for (must be valid)
721 decomp: True to decompress any compressed data before returning it;
722 False to return the raw, uncompressed data
725 Data for the child (bytes)
729 def LoadData(self, decomp=True):
730 data = self.ReadData(decomp)
731 self.contents_size = len(data)
732 self.ProcessContentsUpdate(data)
733 self.Detail('Loaded data size %x' % len(data))
736 """Get the image containing this entry
739 Image object containing this entry
741 return self.section.GetImage()
743 def WriteData(self, data, decomp=True):
744 """Write the data to an entry in the image
746 This is used when the image has been read in and we want to replace the
747 data for a particular entry in that image.
749 The image must be re-packed and written out afterwards.
752 data: Data to replace it with
753 decomp: True to compress the data if needed, False if data is
754 already compressed so should be used as is
757 True if the data did not result in a resize of this entry, False if
758 the entry must be resized
760 self.contents_size = self.size
761 ok = self.ProcessContentsUpdate(data)
762 self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
763 section_ok = self.section.WriteChildData(self)
764 return ok and section_ok
766 def WriteChildData(self, child):
767 """Handle writing the data in a child entry
769 This should be called on the child's parent section after the child's
770 data has been updated. It
772 This base-class implementation does nothing, since the base Entry object
773 does not have any children.
776 child: Child Entry that was written
779 True if the section could be updated successfully, False if the
780 data is such that the section could not updat
784 def GetSiblingOrder(self):
785 """Get the relative order of an entry amoung its siblings
788 'start' if this entry is first among siblings, 'end' if last,
791 entries = list(self.section.GetEntries().values())
793 if self == entries[0]:
795 elif self == entries[-1]: