1 # SPDX-License-Identifier: GPL-2.0+
2 # Copyright (c) 2016 Google, Inc
3 # Written by Simon Glass <sjg@chromium.org>
5 # Creates binary images from input files controlled by a description
8 from __future__ import print_function
10 from collections import OrderedDict
18 from image import Image
22 # List of images we plan to create
23 # Make this global so that it can be referenced from tests
24 images = OrderedDict()
26 def _ReadImageDesc(binman_node):
27 """Read the image descriptions from the /binman node
29 This normally produces a single Image object called 'image'. But if
30 multiple images are present, they will all be returned.
33 binman_node: Node object of the /binman node
35 OrderedDict of Image objects, each of which describes an image
37 images = OrderedDict()
38 if 'multiple-images' in binman_node.props:
39 for node in binman_node.subnodes:
40 images[node.name] = Image(node.name, node)
42 images['image'] = Image('image', binman_node)
45 def _FindBinmanNode(dtb):
46 """Find the 'binman' node in the device tree
49 dtb: Fdt object to scan
51 Node object of /binman node, or None if not found
53 for node in dtb.GetRoot().subnodes:
54 if node.name == 'binman':
58 def WriteEntryDocs(modules, test_missing=None):
59 """Write out documentation for all entries
62 modules: List of Module objects to get docs for
63 test_missing: Used for testing only, to force an entry's documeentation
64 to show as missing even if it is present. Should be set to None in
67 from entry import Entry
68 Entry.WriteDocs(modules, test_missing)
71 def ListEntries(image_fname, entry_paths):
72 """List the entries in an image
74 This decodes the supplied image and displays a table of entries from that
75 image, preceded by a header.
78 image_fname: Image filename to process
79 entry_paths: List of wildcarded paths (e.g. ['*dtb*', 'u-boot*',
82 image = Image.FromFile(image_fname)
84 entries, lines, widths = image.GetListEntries(entry_paths)
86 num_columns = len(widths)
87 for linenum, line in enumerate(lines):
90 print('-' * (sum(widths) + num_columns * 2))
92 for i, item in enumerate(line):
94 if item.startswith('>'):
97 txt = '%*s ' % (width, item)
102 def ReadEntry(image_fname, entry_path, decomp=True):
103 """Extract an entry from an image
105 This extracts the data from a particular entry in an image
108 image_fname: Image filename to process
109 entry_path: Path to entry to extract
110 decomp: True to return uncompressed data, if the data is compress
111 False to return the raw data
114 data extracted from the entry
116 image = Image.FromFile(image_fname)
117 entry = image.FindEntryPath(entry_path)
118 return entry.ReadData(decomp)
121 def WriteEntry(image_fname, entry_path, data, decomp=True, allow_resize=True):
122 """Replace an entry in an image
124 This replaces the data in a particular entry in an image. This size of the
125 new data must match the size of the old data unless allow_resize is True.
128 image_fname: Image filename to process
129 entry_path: Path to entry to extract
130 data: Data to replace with
131 decomp: True to compress the data if needed, False if data is
132 already compressed so should be used as is
133 allow_resize: True to allow entries to change size (this does a re-pack
134 of the entries), False to raise an exception
137 Image object that was updated
139 tout.Info("WriteEntry '%s', file '%s'" % (entry_path, image_fname))
140 image = Image.FromFile(image_fname)
141 entry = image.FindEntryPath(entry_path)
142 state.PrepareFromLoadedData(image)
145 # If repacking, drop the old offset/size values except for the original
146 # ones, so we are only left with the constraints.
149 tout.Info('Writing data to %s' % entry.GetPath())
150 if not entry.WriteData(data, decomp):
151 if not image.allow_repack:
152 entry.Raise('Entry data size does not match, but allow-repack is not present for this image')
154 entry.Raise('Entry data size does not match, but resize is disabled')
155 tout.Info('Processing image')
156 ProcessImage(image, update_fdt=True, write_map=False, get_contents=False,
157 allow_resize=allow_resize)
158 tout.Info('WriteEntry done')
162 def ExtractEntries(image_fname, output_fname, outdir, entry_paths,
164 """Extract the data from one or more entries and write it to files
167 image_fname: Image filename to process
168 output_fname: Single output filename to use if extracting one file, None
170 outdir: Output directory to use (for any number of files), else None
171 entry_paths: List of entry paths to extract
172 decomp: True to compress the entry data
175 List of EntryInfo records that were written
177 image = Image.FromFile(image_fname)
179 # Output an entry to a single file, as a special case
182 raise ValueError('Must specify an entry path to write with -o')
183 if len(entry_paths) != 1:
184 raise ValueError('Must specify exactly one entry path to write with -o')
185 entry = image.FindEntryPath(entry_paths[0])
186 data = entry.ReadData(decomp)
187 tools.WriteFile(output_fname, data)
188 tout.Notice("Wrote %#x bytes to file '%s'" % (len(data), output_fname))
191 # Otherwise we will output to a path given by the entry path of each entry.
192 # This means that entries will appear in subdirectories if they are part of
194 einfos = image.GetListEntries(entry_paths)[0]
195 tout.Notice('%d entries match and will be written' % len(einfos))
198 data = entry.ReadData(decomp)
199 path = entry.GetPath()[1:]
200 fname = os.path.join(outdir, path)
202 # If this entry has children, create a directory for it and put its
203 # data in a file called 'root' in that directory
204 if entry.GetEntries():
205 if not os.path.exists(fname):
207 fname = os.path.join(fname, 'root')
208 tout.Notice("Write entry '%s' to '%s'" % (entry.GetPath(), fname))
209 tools.WriteFile(fname, data)
213 def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt):
214 """Prepare the images to be processed and select the device tree
217 - reads in the device tree
218 - finds and scans the binman node to create all entries
219 - selects which images to build
220 - Updates the device tress with placeholder properties for offset,
224 dtb_fname: Filename of the device tree file to use (.dts or .dtb)
225 selected_images: List of images to output, or None for all
226 update_fdt: True to update the FDT wth entry offsets, etc.
228 # Import these here in case libfdt.py is not available, in which case
229 # the above help option still works.
234 # Get the device tree ready by compiling it and copying the compiled
235 # output into a file in our output directly. Then scan it for use
237 dtb_fname = fdt_util.EnsureCompiled(dtb_fname)
238 fname = tools.GetOutputFilename('u-boot.dtb.out')
239 tools.WriteFile(fname, tools.ReadFile(dtb_fname))
240 dtb = fdt.FdtScan(fname)
242 node = _FindBinmanNode(dtb)
244 raise ValueError("Device tree '%s' does not have a 'binman' "
247 images = _ReadImageDesc(node)
251 new_images = OrderedDict()
252 for name, image in images.items():
253 if name in select_images:
254 new_images[name] = image
258 tout.Notice('Skipping images: %s' % ', '.join(skip))
260 state.Prepare(images, dtb)
262 # Prepare the device tree by making sure that any missing
263 # properties are added (e.g. 'pos' and 'size'). The values of these
264 # may not be correct yet, but we add placeholders so that the
265 # size of the device tree is correct. Later, in
266 # SetCalculatedProperties() we will insert the correct values
267 # without changing the device-tree size, thus ensuring that our
268 # entry offsets remain the same.
269 for image in images.values():
270 image.ExpandEntries()
272 image.AddMissingProperties()
273 image.ProcessFdt(dtb)
275 for dtb_item in state.GetAllFdts():
276 dtb_item.Sync(auto_resize=True)
282 def ProcessImage(image, update_fdt, write_map, get_contents=True,
284 """Perform all steps for this image, including checking and # writing it.
286 This means that errors found with a later image will be reported after
287 earlier images are already completed and written, but that does not seem
291 image: Image to process
292 update_fdt: True to update the FDT wth entry offsets, etc.
293 write_map: True to write a map file
294 get_contents: True to get the image contents from files, etc., False if
295 the contents is already present
296 allow_resize: True to allow entries to change size (this does a re-pack
297 of the entries), False to raise an exception
300 image.GetEntryContents()
301 image.GetEntryOffsets()
303 # We need to pack the entries to figure out where everything
304 # should be placed. This sets the offset/size of each entry.
305 # However, after packing we call ProcessEntryContents() which
306 # may result in an entry changing size. In that case we need to
307 # do another pass. Since the device tree often contains the
308 # final offset/size information we try to make space for this in
309 # AddMissingProperties() above. However, if the device is
310 # compressed we cannot know this compressed size in advance,
311 # since changing an offset from 0x100 to 0x104 (for example) can
312 # alter the compressed size of the device tree. So we need a
313 # third pass for this.
315 for pack_pass in range(passes):
320 except Exception as e:
322 fname = image.WriteMap()
323 print("Wrote map file '%s' to show errors" % fname)
327 image.SetCalculatedProperties()
328 for dtb_item in state.GetAllFdts():
331 sizes_ok = image.ProcessEntryContents()
336 image.Raise('Entries changed size after packing (tried %s passes)' %
346 """The main control code for binman
348 This assumes that help and test options have already been dealt with. It
349 deals with the core task of building images.
352 args: Command line arguments Namespace object
355 pager = os.getenv('PAGER')
358 fname = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
360 command.Run(pager, fname)
365 tools.PrepareOutputDir(None)
366 ListEntries(args.image, args.paths)
368 tools.FinaliseOutputDir()
371 if args.cmd == 'extract':
373 tools.PrepareOutputDir(None)
374 ExtractEntries(args.image, args.filename, args.outdir, args.paths,
375 not args.uncompressed)
377 tools.FinaliseOutputDir()
380 # Try to figure out which device tree contains our image description
386 raise ValueError('Must provide a board to process (use -b <board>)')
387 board_pathname = os.path.join(args.build_dir, board)
388 dtb_fname = os.path.join(board_pathname, 'u-boot.dtb')
391 args.indir.append(board_pathname)
394 tout.Init(args.verbosity)
395 elf.debug = args.debug
396 cbfs_util.VERBOSE = args.verbosity > 2
397 state.use_fake_dtb = args.fake_dtb
399 tools.SetInputDirs(args.indir)
400 tools.PrepareOutputDir(args.outdir, args.preserve)
401 tools.SetToolPaths(args.toolpath)
402 state.SetEntryArgs(args.entry_arg)
404 images = PrepareImagesAndDtbs(dtb_fname, args.image,
406 for image in images.values():
407 ProcessImage(image, args.update_fdt, args.map)
409 # Write the updated FDTs to our output files
410 for dtb_item in state.GetAllFdts():
411 tools.WriteFile(dtb_item._fname, dtb_item.GetContents())
414 tools.FinaliseOutputDir()