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
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, read_node=True, name_prefix=''):
73 self.section = section
76 self.name = node and (name_prefix + node.name) or 'none'
79 self.uncomp_size = None
81 self.contents_size = 0
83 self.align_size = None
87 self.offset_unset = False
89 self._expand_size = False
90 self.compress = 'none'
95 def Lookup(node_path, etype):
96 """Look up the entry class for a node.
99 node_node: Path name of Node object containing information about
100 the entry to create (used for errors)
101 etype: Entry type to use
104 The entry class object if found, else None
106 # Convert something like 'u-boot@0' to 'u_boot' since we are only
107 # interested in the type.
108 module_name = etype.replace('-', '_')
109 if '@' in module_name:
110 module_name = module_name.split('@')[0]
111 module = modules.get(module_name)
113 # Also allow entry-type modules to be brought in from the etype directory.
115 # Import the module if we have not already done so.
118 sys.path.insert(0, os.path.join(our_path, 'etype'))
121 module = importlib.import_module(module_name)
123 module = __import__(module_name)
124 except ImportError as e:
125 raise ValueError("Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
126 (etype, node_path, module_name, e))
129 modules[module_name] = module
131 # Look up the expected class name
132 return getattr(module, 'Entry_%s' % module_name)
135 def Create(section, node, etype=None):
136 """Create a new entry for a node.
139 section: Section object containing this node
140 node: Node object containing information about the entry to
142 etype: Entry type to use, or None to work it out (used for tests)
145 A new Entry object of the correct type (a subclass of Entry)
148 etype = fdt_util.GetString(node, 'type', node.name)
149 obj = Entry.Lookup(node.path, etype)
151 # Call its constructor to get the object we want.
152 return obj(section, etype, node)
155 """Read entry information from the node
157 This reads all the fields we recognise from the node, ready for use.
159 if 'pos' in self._node.props:
160 self.Raise("Please use 'offset' instead of 'pos'")
161 self.offset = fdt_util.GetInt(self._node, 'offset')
162 self.size = fdt_util.GetInt(self._node, 'size')
163 self.orig_offset = self.offset
164 self.orig_size = self.size
166 # These should not be set in input files, but are set in an FDT map,
167 # which is also read by this code.
168 self.image_pos = fdt_util.GetInt(self._node, 'image-pos')
169 self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size')
171 self.align = fdt_util.GetInt(self._node, 'align')
172 if tools.NotPowerOfTwo(self.align):
173 raise ValueError("Node '%s': Alignment %s must be a power of two" %
174 (self._node.path, self.align))
175 self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0)
176 self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0)
177 self.align_size = fdt_util.GetInt(self._node, 'align-size')
178 if tools.NotPowerOfTwo(self.align_size):
179 self.Raise("Alignment size %s must be a power of two" %
181 self.align_end = fdt_util.GetInt(self._node, 'align-end')
182 self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
183 self.expand_size = fdt_util.GetBool(self._node, 'expand-size')
185 def GetDefaultFilename(self):
189 """Get the set of device trees used by this entry
192 Set containing the filename from this entry, if it is a .dtb, else
197 def ExpandEntries(self):
200 def AddMissingProperties(self):
201 """Add new properties to the device tree as needed for this entry"""
202 for prop in ['offset', 'size', 'image-pos']:
203 if not prop in self._node.props:
204 state.AddZeroProp(self._node, prop)
205 if self.compress != 'none':
206 state.AddZeroProp(self._node, 'uncomp-size')
207 err = state.CheckAddHashProp(self._node)
211 def SetCalculatedProperties(self):
212 """Set the value of device-tree properties calculated by binman"""
213 state.SetInt(self._node, 'offset', self.offset)
214 state.SetInt(self._node, 'size', self.size)
215 base = self.section.GetRootSkipAtStart() if self.section else 0
216 state.SetInt(self._node, 'image-pos', self.image_pos - base)
217 if self.uncomp_size is not None:
218 state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
219 state.CheckSetHashValue(self._node, self.GetData)
221 def ProcessFdt(self, fdt):
222 """Allow entries to adjust the device tree
224 Some entries need to adjust the device tree for their purposes. This
225 may involve adding or deleting properties.
228 True if processing is complete
229 False if processing could not be completed due to a dependency.
230 This will cause the entry to be retried after others have been
235 def SetPrefix(self, prefix):
236 """Set the name prefix for a node
239 prefix: Prefix to set, or '' to not use a prefix
242 self.name = prefix + self.name
244 def SetContents(self, data):
245 """Set the contents of an entry
247 This sets both the data and content_size properties
250 data: Data to set to the contents (bytes)
253 self.contents_size = len(self.data)
255 def ProcessContentsUpdate(self, data):
256 """Update the contents of an entry, after the size is fixed
258 This checks that the new data is the same size as the old. If the size
259 has changed, this triggers a re-run of the packing algorithm.
262 data: Data to set to the contents (bytes)
265 ValueError if the new data size is not the same as the old
269 if state.AllowEntryExpansion():
270 if new_size > self.contents_size:
271 tout.Debug("Entry '%s' size change from %#x to %#x" % (
272 self._node.path, self.contents_size, new_size))
273 # self.data will indicate the new size needed
275 elif new_size != self.contents_size:
276 self.Raise('Cannot update entry size from %d to %d' %
277 (self.contents_size, new_size))
278 self.SetContents(data)
281 def ObtainContents(self):
282 """Figure out the contents of an entry.
285 True if the contents were found, False if another call is needed
286 after the other entries are processed.
288 # No contents by default: subclasses can implement this
291 def ResetForPack(self):
292 """Reset offset/size fields so that packing can be done again"""
293 self.offset = self.orig_offset
294 self.size = self.orig_size
296 def Pack(self, offset):
297 """Figure out how to pack the entry into the section
299 Most of the time the entries are not fully specified. There may be
300 an alignment but no size. In that case we take the size from the
301 contents of the entry.
303 If an entry has no hard-coded offset, it will be placed at @offset.
305 Once this function is complete, both the offset and size of the
309 Current section offset pointer
312 New section offset pointer (after this entry)
314 if self.offset is None:
315 if self.offset_unset:
316 self.Raise('No offset set with offset-unset: should another '
317 'entry provide this correct offset?')
318 self.offset = tools.Align(offset, self.align)
319 needed = self.pad_before + self.contents_size + self.pad_after
320 needed = tools.Align(needed, self.align_size)
324 new_offset = self.offset + size
325 aligned_offset = tools.Align(new_offset, self.align_end)
326 if aligned_offset != new_offset:
327 size = aligned_offset - self.offset
328 new_offset = aligned_offset
333 if self.size < needed:
334 self.Raise("Entry contents size is %#x (%d) but entry size is "
335 "%#x (%d)" % (needed, needed, self.size, self.size))
336 # Check that the alignment is correct. It could be wrong if the
337 # and offset or size values were provided (i.e. not calculated), but
338 # conflict with the provided alignment values
339 if self.size != tools.Align(self.size, self.align_size):
340 self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
341 (self.size, self.size, self.align_size, self.align_size))
342 if self.offset != tools.Align(self.offset, self.align):
343 self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
344 (self.offset, self.offset, self.align, self.align))
348 def Raise(self, msg):
349 """Convenience function to raise an error referencing a node"""
350 raise ValueError("Node '%s': %s" % (self._node.path, msg))
352 def GetEntryArgsOrProps(self, props, required=False):
353 """Return the values of a set of properties
356 props: List of EntryArg objects
359 ValueError if a property is not found
364 python_prop = prop.name.replace('-', '_')
365 if hasattr(self, python_prop):
366 value = getattr(self, python_prop)
370 value = self.GetArg(prop.name, prop.datatype)
371 if value is None and required:
372 missing.append(prop.name)
375 self.Raise('Missing required properties/entry args: %s' %
376 (', '.join(missing)))
380 """Get the path of a node
383 Full path of the node for this entry
385 return self._node.path
390 def GetOffsets(self):
391 """Get the offsets for siblings
393 Some entry types can contain information about the position or size of
394 other entries. An example of this is the Intel Flash Descriptor, which
395 knows where the Intel Management Engine section should go.
397 If this entry knows about the position of other entries, it can specify
398 this by returning values here
403 value: List containing position and size of the given entry
404 type. Either can be None if not known
408 def SetOffsetSize(self, offset, size):
409 """Set the offset and/or size of an entry
412 offset: New offset, or None to leave alone
413 size: New size, or None to leave alone
415 if offset is not None:
420 def SetImagePos(self, image_pos):
421 """Set the position in the image
424 image_pos: Position of this entry in the image
426 self.image_pos = image_pos + self.offset
428 def ProcessContents(self):
429 """Do any post-packing updates of entry contents
431 This function should call ProcessContentsUpdate() to update the entry
432 contents, if necessary, returning its return value here.
435 data: Data to set to the contents (bytes)
438 True if the new data size is OK, False if expansion is needed
441 ValueError if the new data size is not the same as the old and
442 state.AllowEntryExpansion() is False
446 def WriteSymbols(self, section):
447 """Write symbol values into binary files for access at run time
450 section: Section containing the entry
454 def CheckOffset(self):
455 """Check that the entry offsets are correct
457 This is used for entries which have extra offset requirements (other
458 than having to be fully inside their section). Sub-classes can implement
459 this function and raise if there is a problem.
467 return '%08x' % value
470 def WriteMapLine(fd, indent, name, offset, size, image_pos):
471 print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
472 Entry.GetStr(offset), Entry.GetStr(size),
475 def WriteMap(self, fd, indent):
476 """Write a map of the entry to a .map file
479 fd: File to write the map to
480 indent: Curent indent level of map (0=none, 1=one level, etc.)
482 self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
485 def GetEntries(self):
486 """Return a list of entries contained by this entry
489 List of entries, or None if none. A normal entry has no entries
490 within it so will return None
494 def GetArg(self, name, datatype=str):
495 """Get the value of an entry argument or device-tree-node property
497 Some node properties can be provided as arguments to binman. First check
498 the entry arguments, and fall back to the device tree if not found
502 datatype: Data type (str or int)
505 Value of argument as a string or int, or None if no value
508 ValueError if the argument cannot be converted to in
510 value = state.GetEntryArg(name)
511 if value is not None:
516 self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
518 elif datatype == str:
521 raise ValueError("GetArg() internal error: Unknown data type '%s'" %
524 value = fdt_util.GetDatatype(self._node, name, datatype)
528 def WriteDocs(modules, test_missing=None):
529 """Write out documentation about the various entry types to stdout
532 modules: List of modules to include
533 test_missing: Used for testing. This is a module to report
536 print('''Binman Entry Documentation
537 ===========================
539 This file describes the entry types supported by binman. These entry types can
540 be placed in an image one by one to build up a final firmware image. It is
541 fairly easy to create new entry types. Just add a new file to the 'etype'
542 directory. You can use the existing entries as examples.
544 Note that some entries are subclasses of others, using and extending their
545 features to produce new behaviours.
549 modules = sorted(modules)
551 # Don't show the test entry
552 if '_testing' in modules:
553 modules.remove('_testing')
556 if name.startswith('__'):
558 module = Entry.Lookup(name, name)
559 docs = getattr(module, '__doc__')
560 if test_missing == name:
563 lines = docs.splitlines()
564 first_line = lines[0]
565 rest = [line[4:] for line in lines[1:]]
566 hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
568 print('-' * len(hdr))
569 print('\n'.join(rest))
576 raise ValueError('Documentation is missing for modules: %s' %
579 def GetUniqueName(self):
580 """Get a unique name for a node
583 String containing a unique name for a node, consisting of the name
584 of all ancestors (starting from within the 'binman' node) separated
585 by a dot ('.'). This can be useful for generating unique filesnames
586 in the output directory.
592 if node.name == 'binman':
594 name = '%s.%s' % (node.name, name)
597 def ExpandToLimit(self, limit):
598 """Expand an entry so that it ends at the given offset limit"""
599 if self.offset + self.size < limit:
600 self.size = limit - self.offset
601 # Request the contents again, since changing the size requires that
602 # the data grows. This should not fail, but check it to be sure.
603 if not self.ObtainContents():
604 self.Raise('Cannot obtain contents when expanding entry')
606 def HasSibling(self, name):
607 """Check if there is a sibling of a given name
610 True if there is an entry with this name in the the same section,
613 return name in self.section.GetEntries()
615 def GetSiblingImagePos(self, name):
616 """Return the image position of the given sibling
619 Image position of sibling, or None if the sibling has no position,
620 or False if there is no such sibling
622 if not self.HasSibling(name):
624 return self.section.GetEntries()[name].image_pos
627 def AddEntryInfo(entries, indent, name, etype, size, image_pos,
628 uncomp_size, offset, entry):
629 """Add a new entry to the entries list
632 entries: List (of EntryInfo objects) to add to
633 indent: Current indent level to add to list
634 name: Entry name (string)
635 etype: Entry type (string)
636 size: Entry size in bytes (int)
637 image_pos: Position within image in bytes (int)
638 uncomp_size: Uncompressed size if the entry uses compression, else
640 offset: Entry offset within parent in bytes (int)
643 entries.append(EntryInfo(indent, name, etype, size, image_pos,
644 uncomp_size, offset, entry))
646 def ListEntries(self, entries, indent):
647 """Add files in this entry to the list of entries
649 This can be overridden by subclasses which need different behaviour.
652 entries: List (of EntryInfo objects) to add to
653 indent: Current indent level to add to list
655 self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
656 self.image_pos, self.uncomp_size, self.offset, self)
658 def ReadData(self, decomp=True):
659 """Read the data for an entry from the image
661 This is used when the image has been read in and we want to extract the
662 data for a particular entry from that image.
665 decomp: True to decompress any compressed data before returning it;
666 False to return the raw, uncompressed data
671 # Use True here so that we get an uncompressed section to work from,
672 # although compressed sections are currently not supported
673 data = self.section.ReadData(True)
674 tout.Info('%s: Reading data from offset %#x-%#x, size %#x (avail %#x)' %
675 (self.GetPath(), self.offset, self.offset + self.size,
676 self.size, len(data)))
677 return data[self.offset:self.offset + self.size]