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):
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
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
134 tout.Info("WriteEntry '%s', file '%s'" % (entry_path, image_fname))
135 image = Image.FromFile(image_fname)
136 entry = image.FindEntryPath(entry_path)
137 state.PrepareFromLoadedData(image)
139 tout.Info('Writing data to %s' % entry.GetPath())
140 if not entry.WriteData(data, decomp):
141 entry.Raise('Entry data size does not match, but resize is disabled')
142 tout.Info('Processing image')
143 ProcessImage(image, update_fdt=True, write_map=False, get_contents=False)
144 tout.Info('WriteEntry done')
147 def ExtractEntries(image_fname, output_fname, outdir, entry_paths,
149 """Extract the data from one or more entries and write it to files
152 image_fname: Image filename to process
153 output_fname: Single output filename to use if extracting one file, None
155 outdir: Output directory to use (for any number of files), else None
156 entry_paths: List of entry paths to extract
157 decomp: True to compress the entry data
160 List of EntryInfo records that were written
162 image = Image.FromFile(image_fname)
164 # Output an entry to a single file, as a special case
167 raise ValueError('Must specify an entry path to write with -o')
168 if len(entry_paths) != 1:
169 raise ValueError('Must specify exactly one entry path to write with -o')
170 entry = image.FindEntryPath(entry_paths[0])
171 data = entry.ReadData(decomp)
172 tools.WriteFile(output_fname, data)
173 tout.Notice("Wrote %#x bytes to file '%s'" % (len(data), output_fname))
176 # Otherwise we will output to a path given by the entry path of each entry.
177 # This means that entries will appear in subdirectories if they are part of
179 einfos = image.GetListEntries(entry_paths)[0]
180 tout.Notice('%d entries match and will be written' % len(einfos))
183 data = entry.ReadData(decomp)
184 path = entry.GetPath()[1:]
185 fname = os.path.join(outdir, path)
187 # If this entry has children, create a directory for it and put its
188 # data in a file called 'root' in that directory
189 if entry.GetEntries():
190 if not os.path.exists(fname):
192 fname = os.path.join(fname, 'root')
193 tout.Notice("Write entry '%s' to '%s'" % (entry.GetPath(), fname))
194 tools.WriteFile(fname, data)
198 def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt):
199 """Prepare the images to be processed and select the device tree
202 - reads in the device tree
203 - finds and scans the binman node to create all entries
204 - selects which images to build
205 - Updates the device tress with placeholder properties for offset,
209 dtb_fname: Filename of the device tree file to use (.dts or .dtb)
210 selected_images: List of images to output, or None for all
211 update_fdt: True to update the FDT wth entry offsets, etc.
213 # Import these here in case libfdt.py is not available, in which case
214 # the above help option still works.
219 # Get the device tree ready by compiling it and copying the compiled
220 # output into a file in our output directly. Then scan it for use
222 dtb_fname = fdt_util.EnsureCompiled(dtb_fname)
223 fname = tools.GetOutputFilename('u-boot.dtb.out')
224 tools.WriteFile(fname, tools.ReadFile(dtb_fname))
225 dtb = fdt.FdtScan(fname)
227 node = _FindBinmanNode(dtb)
229 raise ValueError("Device tree '%s' does not have a 'binman' "
232 images = _ReadImageDesc(node)
236 new_images = OrderedDict()
237 for name, image in images.items():
238 if name in select_images:
239 new_images[name] = image
243 tout.Notice('Skipping images: %s' % ', '.join(skip))
245 state.Prepare(images, dtb)
247 # Prepare the device tree by making sure that any missing
248 # properties are added (e.g. 'pos' and 'size'). The values of these
249 # may not be correct yet, but we add placeholders so that the
250 # size of the device tree is correct. Later, in
251 # SetCalculatedProperties() we will insert the correct values
252 # without changing the device-tree size, thus ensuring that our
253 # entry offsets remain the same.
254 for image in images.values():
255 image.ExpandEntries()
257 image.AddMissingProperties()
258 image.ProcessFdt(dtb)
260 for dtb_item in state.GetAllFdts():
261 dtb_item.Sync(auto_resize=True)
267 def ProcessImage(image, update_fdt, write_map, get_contents=True):
268 """Perform all steps for this image, including checking and # writing it.
270 This means that errors found with a later image will be reported after
271 earlier images are already completed and written, but that does not seem
275 image: Image to process
276 update_fdt: True to update the FDT wth entry offsets, etc.
277 write_map: True to write a map file
278 get_contents: True to get the image contents from files, etc., False if
279 the contents is already present
282 image.GetEntryContents()
283 image.GetEntryOffsets()
285 # We need to pack the entries to figure out where everything
286 # should be placed. This sets the offset/size of each entry.
287 # However, after packing we call ProcessEntryContents() which
288 # may result in an entry changing size. In that case we need to
289 # do another pass. Since the device tree often contains the
290 # final offset/size information we try to make space for this in
291 # AddMissingProperties() above. However, if the device is
292 # compressed we cannot know this compressed size in advance,
293 # since changing an offset from 0x100 to 0x104 (for example) can
294 # alter the compressed size of the device tree. So we need a
295 # third pass for this.
297 for pack_pass in range(passes):
302 except Exception as e:
304 fname = image.WriteMap()
305 print("Wrote map file '%s' to show errors" % fname)
309 image.SetCalculatedProperties()
310 for dtb_item in state.GetAllFdts():
312 sizes_ok = image.ProcessEntryContents()
317 image.Raise('Entries expanded after packing (tried %s passes)' %
327 """The main control code for binman
329 This assumes that help and test options have already been dealt with. It
330 deals with the core task of building images.
333 args: Command line arguments Namespace object
336 pager = os.getenv('PAGER')
339 fname = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
341 command.Run(pager, fname)
345 ListEntries(args.image, args.paths)
348 if args.cmd == 'extract':
350 tools.PrepareOutputDir(None)
351 ExtractEntries(args.image, args.filename, args.outdir, args.paths,
352 not args.uncompressed)
354 tools.FinaliseOutputDir()
357 # Try to figure out which device tree contains our image description
363 raise ValueError('Must provide a board to process (use -b <board>)')
364 board_pathname = os.path.join(args.build_dir, board)
365 dtb_fname = os.path.join(board_pathname, 'u-boot.dtb')
368 args.indir.append(board_pathname)
371 tout.Init(args.verbosity)
372 elf.debug = args.debug
373 cbfs_util.VERBOSE = args.verbosity > 2
374 state.use_fake_dtb = args.fake_dtb
376 tools.SetInputDirs(args.indir)
377 tools.PrepareOutputDir(args.outdir, args.preserve)
378 tools.SetToolPaths(args.toolpath)
379 state.SetEntryArgs(args.entry_arg)
381 images = PrepareImagesAndDtbs(dtb_fname, args.image,
383 for image in images.values():
384 ProcessImage(image, args.update_fdt, args.map)
386 # Write the updated FDTs to our output files
387 for dtb_item in state.GetAllFdts():
388 tools.WriteFile(dtb_item._fname, dtb_item.GetContents())
391 tools.FinaliseOutputDir()