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, or None
52 align_size: Entry size alignment, or None
53 align_end: Entry end offset alignment, or None
54 pad_before: Number of pad bytes before the contents, 0 if none
55 pad_after: Number of pad bytes after the contents, 0 if none
56 data: Contents of entry (string of bytes)
57 compress: Compression algoithm used (e.g. 'lz4'), 'none' if none
58 orig_offset: Original offset value read from node
59 orig_size: Original size value read from node
61 def __init__(self, section, etype, node, name_prefix=''):
62 # Put this here to allow entry-docs and help to work without libfdt
64 from binman import state
66 self.section = section
69 self.name = node and (name_prefix + node.name) or 'none'
72 self.pre_reset_size = None
73 self.uncomp_size = None
75 self.contents_size = 0
77 self.align_size = None
81 self.offset_unset = False
83 self._expand_size = False
84 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 module = importlib.import_module('binman.etype.' + module_name)
112 except ImportError as e:
113 raise ValueError("Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
114 (etype, node_path, module_name, e))
115 modules[module_name] = module
117 # Look up the expected class name
118 return getattr(module, 'Entry_%s' % module_name)
121 def Create(section, node, etype=None):
122 """Create a new entry for a node.
125 section: Section object containing this node
126 node: Node object containing information about the entry to
128 etype: Entry type to use, or None to work it out (used for tests)
131 A new Entry object of the correct type (a subclass of Entry)
134 etype = fdt_util.GetString(node, 'type', node.name)
135 obj = Entry.Lookup(node.path, etype)
137 # Call its constructor to get the object we want.
138 return obj(section, etype, node)
141 """Read entry information from the node
143 This must be called as the first thing after the Entry is created.
145 This reads all the fields we recognise from the node, ready for use.
147 if 'pos' in self._node.props:
148 self.Raise("Please use 'offset' instead of 'pos'")
149 self.offset = fdt_util.GetInt(self._node, 'offset')
150 self.size = fdt_util.GetInt(self._node, 'size')
151 self.orig_offset = fdt_util.GetInt(self._node, 'orig-offset')
152 self.orig_size = fdt_util.GetInt(self._node, 'orig-size')
153 if self.GetImage().copy_to_orig:
154 self.orig_offset = self.offset
155 self.orig_size = self.size
157 # These should not be set in input files, but are set in an FDT map,
158 # which is also read by this code.
159 self.image_pos = fdt_util.GetInt(self._node, 'image-pos')
160 self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size')
162 self.align = fdt_util.GetInt(self._node, 'align')
163 if tools.NotPowerOfTwo(self.align):
164 raise ValueError("Node '%s': Alignment %s must be a power of two" %
165 (self._node.path, self.align))
166 self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0)
167 self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0)
168 self.align_size = fdt_util.GetInt(self._node, 'align-size')
169 if tools.NotPowerOfTwo(self.align_size):
170 self.Raise("Alignment size %s must be a power of two" %
172 self.align_end = fdt_util.GetInt(self._node, 'align-end')
173 self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
174 self.expand_size = fdt_util.GetBool(self._node, 'expand-size')
176 def GetDefaultFilename(self):
180 """Get the device trees used by this entry
183 Empty dict, if this entry is not a .dtb, otherwise:
185 key: Filename from this entry (without the path)
187 Fdt object for this dtb, or None if not available
188 Filename of file containing this dtb
192 def ExpandEntries(self):
195 def AddMissingProperties(self):
196 """Add new properties to the device tree as needed for this entry"""
197 for prop in ['offset', 'size', 'image-pos']:
198 if not prop in self._node.props:
199 state.AddZeroProp(self._node, prop)
200 if self.GetImage().allow_repack:
201 if self.orig_offset is not None:
202 state.AddZeroProp(self._node, 'orig-offset', True)
203 if self.orig_size is not None:
204 state.AddZeroProp(self._node, 'orig-size', True)
206 if self.compress != 'none':
207 state.AddZeroProp(self._node, 'uncomp-size')
208 err = state.CheckAddHashProp(self._node)
212 def SetCalculatedProperties(self):
213 """Set the value of device-tree properties calculated by binman"""
214 state.SetInt(self._node, 'offset', self.offset)
215 state.SetInt(self._node, 'size', self.size)
216 base = self.section.GetRootSkipAtStart() if self.section else 0
217 state.SetInt(self._node, 'image-pos', self.image_pos - base)
218 if self.GetImage().allow_repack:
219 if self.orig_offset is not None:
220 state.SetInt(self._node, 'orig-offset', self.orig_offset, True)
221 if self.orig_size is not None:
222 state.SetInt(self._node, 'orig-size', self.orig_size, True)
223 if self.uncomp_size is not None:
224 state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
225 state.CheckSetHashValue(self._node, self.GetData)
227 def ProcessFdt(self, fdt):
228 """Allow entries to adjust the device tree
230 Some entries need to adjust the device tree for their purposes. This
231 may involve adding or deleting properties.
234 True if processing is complete
235 False if processing could not be completed due to a dependency.
236 This will cause the entry to be retried after others have been
241 def SetPrefix(self, prefix):
242 """Set the name prefix for a node
245 prefix: Prefix to set, or '' to not use a prefix
248 self.name = prefix + self.name
250 def SetContents(self, data):
251 """Set the contents of an entry
253 This sets both the data and content_size properties
256 data: Data to set to the contents (bytes)
259 self.contents_size = len(self.data)
261 def ProcessContentsUpdate(self, data):
262 """Update the contents of an entry, after the size is fixed
264 This checks that the new data is the same size as the old. If the size
265 has changed, this triggers a re-run of the packing algorithm.
268 data: Data to set to the contents (bytes)
271 ValueError if the new data size is not the same as the old
275 if state.AllowEntryExpansion() and new_size > self.contents_size:
276 # self.data will indicate the new size needed
278 elif state.AllowEntryContraction() and new_size < self.contents_size:
281 # If not allowed to change, try to deal with it or give up
283 if new_size > self.contents_size:
284 self.Raise('Cannot update entry size from %d to %d' %
285 (self.contents_size, new_size))
287 # Don't let the data shrink. Pad it if necessary
288 if size_ok and new_size < self.contents_size:
289 data += tools.GetBytes(0, self.contents_size - new_size)
292 tout.Debug("Entry '%s' size change from %s to %s" % (
293 self._node.path, ToHex(self.contents_size),
295 self.SetContents(data)
298 def ObtainContents(self):
299 """Figure out the contents of an entry.
302 True if the contents were found, False if another call is needed
303 after the other entries are processed.
305 # No contents by default: subclasses can implement this
308 def ResetForPack(self):
309 """Reset offset/size fields so that packing can be done again"""
310 self.Detail('ResetForPack: offset %s->%s, size %s->%s' %
311 (ToHex(self.offset), ToHex(self.orig_offset),
312 ToHex(self.size), ToHex(self.orig_size)))
313 self.pre_reset_size = self.size
314 self.offset = self.orig_offset
315 self.size = self.orig_size
317 def Pack(self, offset):
318 """Figure out how to pack the entry into the section
320 Most of the time the entries are not fully specified. There may be
321 an alignment but no size. In that case we take the size from the
322 contents of the entry.
324 If an entry has no hard-coded offset, it will be placed at @offset.
326 Once this function is complete, both the offset and size of the
330 Current section offset pointer
333 New section offset pointer (after this entry)
335 self.Detail('Packing: offset=%s, size=%s, content_size=%x' %
336 (ToHex(self.offset), ToHex(self.size),
338 if self.offset is None:
339 if self.offset_unset:
340 self.Raise('No offset set with offset-unset: should another '
341 'entry provide this correct offset?')
342 self.offset = tools.Align(offset, self.align)
343 needed = self.pad_before + self.contents_size + self.pad_after
344 needed = tools.Align(needed, self.align_size)
348 new_offset = self.offset + size
349 aligned_offset = tools.Align(new_offset, self.align_end)
350 if aligned_offset != new_offset:
351 size = aligned_offset - self.offset
352 new_offset = aligned_offset
357 if self.size < needed:
358 self.Raise("Entry contents size is %#x (%d) but entry size is "
359 "%#x (%d)" % (needed, needed, self.size, self.size))
360 # Check that the alignment is correct. It could be wrong if the
361 # and offset or size values were provided (i.e. not calculated), but
362 # conflict with the provided alignment values
363 if self.size != tools.Align(self.size, self.align_size):
364 self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
365 (self.size, self.size, self.align_size, self.align_size))
366 if self.offset != tools.Align(self.offset, self.align):
367 self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
368 (self.offset, self.offset, self.align, self.align))
369 self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' %
370 (self.offset, self.size, self.contents_size, new_offset))
374 def Raise(self, msg):
375 """Convenience function to raise an error referencing a node"""
376 raise ValueError("Node '%s': %s" % (self._node.path, msg))
378 def Detail(self, msg):
379 """Convenience function to log detail referencing a node"""
380 tag = "Node '%s'" % self._node.path
381 tout.Detail('%30s: %s' % (tag, msg))
383 def GetEntryArgsOrProps(self, props, required=False):
384 """Return the values of a set of properties
387 props: List of EntryArg objects
390 ValueError if a property is not found
395 python_prop = prop.name.replace('-', '_')
396 if hasattr(self, python_prop):
397 value = getattr(self, python_prop)
401 value = self.GetArg(prop.name, prop.datatype)
402 if value is None and required:
403 missing.append(prop.name)
406 self.Raise('Missing required properties/entry args: %s' %
407 (', '.join(missing)))
411 """Get the path of a node
414 Full path of the node for this entry
416 return self._node.path
419 self.Detail('GetData: size %s' % ToHexSize(self.data))
422 def GetOffsets(self):
423 """Get the offsets for siblings
425 Some entry types can contain information about the position or size of
426 other entries. An example of this is the Intel Flash Descriptor, which
427 knows where the Intel Management Engine section should go.
429 If this entry knows about the position of other entries, it can specify
430 this by returning values here
435 value: List containing position and size of the given entry
436 type. Either can be None if not known
440 def SetOffsetSize(self, offset, size):
441 """Set the offset and/or size of an entry
444 offset: New offset, or None to leave alone
445 size: New size, or None to leave alone
447 if offset is not None:
452 def SetImagePos(self, image_pos):
453 """Set the position in the image
456 image_pos: Position of this entry in the image
458 self.image_pos = image_pos + self.offset
460 def ProcessContents(self):
461 """Do any post-packing updates of entry contents
463 This function should call ProcessContentsUpdate() to update the entry
464 contents, if necessary, returning its return value here.
467 data: Data to set to the contents (bytes)
470 True if the new data size is OK, False if expansion is needed
473 ValueError if the new data size is not the same as the old and
474 state.AllowEntryExpansion() is False
478 def WriteSymbols(self, section):
479 """Write symbol values into binary files for access at run time
482 section: Section containing the entry
486 def CheckOffset(self):
487 """Check that the entry offsets are correct
489 This is used for entries which have extra offset requirements (other
490 than having to be fully inside their section). Sub-classes can implement
491 this function and raise if there is a problem.
499 return '%08x' % value
502 def WriteMapLine(fd, indent, name, offset, size, image_pos):
503 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
504 Entry.GetStr(offset), Entry.GetStr(size),
507 def WriteMap(self, fd, indent):
508 """Write a map of the entry to a .map file
511 fd: File to write the map to
512 indent: Curent indent level of map (0=none, 1=one level, etc.)
514 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
517 def GetEntries(self):
518 """Return a list of entries contained by this entry
521 List of entries, or None if none. A normal entry has no entries
522 within it so will return None
526 def GetArg(self, name, datatype=str):
527 """Get the value of an entry argument or device-tree-node property
529 Some node properties can be provided as arguments to binman. First check
530 the entry arguments, and fall back to the device tree if not found
534 datatype: Data type (str or int)
537 Value of argument as a string or int, or None if no value
540 ValueError if the argument cannot be converted to in
542 value = state.GetEntryArg(name)
543 if value is not None:
548 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
550 elif datatype == str:
553 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
556 value = fdt_util.GetDatatype(self._node, name, datatype)
560 def WriteDocs(modules, test_missing=None):
561 """Write out documentation about the various entry types to stdout
564 modules: List of modules to include
565 test_missing: Used for testing. This is a module to report
568 print('''Binman Entry Documentation
569 ===========================
571 This file describes the entry types supported by binman. These entry types can
572 be placed in an image one by one to build up a final firmware image. It is
573 fairly easy to create new entry types. Just add a new file to the 'etype'
574 directory. You can use the existing entries as examples.
576 Note that some entries are subclasses of others, using and extending their
577 features to produce new behaviours.
581 modules = sorted(modules)
583 # Don't show the test entry
584 if '_testing' in modules:
585 modules.remove('_testing')
588 module = Entry.Lookup('WriteDocs', name)
589 docs = getattr(module, '__doc__')
590 if test_missing == name:
593 lines = docs.splitlines()
594 first_line = lines[0]
595 rest = [line[4:] for line in lines[1:]]
596 hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
598 print('-' * len(hdr))
599 print('\n'.join(rest))
606 raise ValueError('Documentation is missing for modules: %s' %
609 def GetUniqueName(self):
610 """Get a unique name for a node
613 String containing a unique name for a node, consisting of the name
614 of all ancestors (starting from within the 'binman' node) separated
615 by a dot ('.'). This can be useful for generating unique filesnames
616 in the output directory.
622 if node.name == 'binman':
624 name = '%s.%s' % (node.name, name)
627 def ExpandToLimit(self, limit):
628 """Expand an entry so that it ends at the given offset limit"""
629 if self.offset + self.size < limit:
630 self.size = limit - self.offset
631 # Request the contents again, since changing the size requires that
632 # the data grows. This should not fail, but check it to be sure.
633 if not self.ObtainContents():
634 self.Raise('Cannot obtain contents when expanding entry')
636 def HasSibling(self, name):
637 """Check if there is a sibling of a given name
640 True if there is an entry with this name in the the same section,
643 return name in self.section.GetEntries()
645 def GetSiblingImagePos(self, name):
646 """Return the image position of the given sibling
649 Image position of sibling, or None if the sibling has no position,
650 or False if there is no such sibling
652 if not self.HasSibling(name):
654 return self.section.GetEntries()[name].image_pos
657 def AddEntryInfo(entries, indent, name, etype, size, image_pos,
658 uncomp_size, offset, entry):
659 """Add a new entry to the entries list
662 entries: List (of EntryInfo objects) to add to
663 indent: Current indent level to add to list
664 name: Entry name (string)
665 etype: Entry type (string)
666 size: Entry size in bytes (int)
667 image_pos: Position within image in bytes (int)
668 uncomp_size: Uncompressed size if the entry uses compression, else
670 offset: Entry offset within parent in bytes (int)
673 entries.append(EntryInfo(indent, name, etype, size, image_pos,
674 uncomp_size, offset, entry))
676 def ListEntries(self, entries, indent):
677 """Add files in this entry to the list of entries
679 This can be overridden by subclasses which need different behaviour.
682 entries: List (of EntryInfo objects) to add to
683 indent: Current indent level to add to list
685 self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
686 self.image_pos, self.uncomp_size, self.offset, self)
688 def ReadData(self, decomp=True):
689 """Read the data for an entry from the image
691 This is used when the image has been read in and we want to extract the
692 data for a particular entry from that image.
695 decomp: True to decompress any compressed data before returning it;
696 False to return the raw, uncompressed data
701 # Use True here so that we get an uncompressed section to work from,
702 # although compressed sections are currently not supported
703 tout.Debug("ReadChildData section '%s', entry '%s'" %
704 (self.section.GetPath(), self.GetPath()))
705 data = self.section.ReadChildData(self, decomp)
708 def ReadChildData(self, child, decomp=True):
709 """Read the data for a particular child entry
711 This reads data from the parent and extracts the piece that relates to
715 child: Child entry to read data for (must be valid)
716 decomp: True to decompress any compressed data before returning it;
717 False to return the raw, uncompressed data
720 Data for the child (bytes)
724 def LoadData(self, decomp=True):
725 data = self.ReadData(decomp)
726 self.contents_size = len(data)
727 self.ProcessContentsUpdate(data)
728 self.Detail('Loaded data size %x' % len(data))
731 """Get the image containing this entry
734 Image object containing this entry
736 return self.section.GetImage()
738 def WriteData(self, data, decomp=True):
739 """Write the data to an entry in the image
741 This is used when the image has been read in and we want to replace the
742 data for a particular entry in that image.
744 The image must be re-packed and written out afterwards.
747 data: Data to replace it with
748 decomp: True to compress the data if needed, False if data is
749 already compressed so should be used as is
752 True if the data did not result in a resize of this entry, False if
753 the entry must be resized
755 if self.size is not None:
756 self.contents_size = self.size
758 self.contents_size = self.pre_reset_size
759 ok = self.ProcessContentsUpdate(data)
760 self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
761 section_ok = self.section.WriteChildData(self)
762 return ok and section_ok
764 def WriteChildData(self, child):
765 """Handle writing the data in a child entry
767 This should be called on the child's parent section after the child's
768 data has been updated. It
770 This base-class implementation does nothing, since the base Entry object
771 does not have any children.
774 child: Child Entry that was written
777 True if the section could be updated successfully, False if the
778 data is such that the section could not updat
782 def GetSiblingOrder(self):
783 """Get the relative order of an entry amoung its siblings
786 'start' if this entry is first among siblings, 'end' if last,
789 entries = list(self.section.GetEntries().values())
791 if self == entries[0]:
793 elif self == entries[-1]:
797 def SetAllowMissing(self, allow_missing):
798 """Set whether a section allows missing external blobs
801 allow_missing: True if allowed, False if not allowed
803 # This is meaningless for anything other than sections
806 def CheckMissing(self, missing_list):
807 """Check if any entries in this section have missing external blobs
809 If there are missing blobs, the entries are added to the list
812 missing_list: List of Entry objects to be added to
815 missing_list.append(self)