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 ExtractEntries(image_fname, output_fname, outdir, entry_paths,
123 """Extract the data from one or more entries and write it to files
126 image_fname: Image filename to process
127 output_fname: Single output filename to use if extracting one file, None
129 outdir: Output directory to use (for any number of files), else None
130 entry_paths: List of entry paths to extract
131 decomp: True to compress the entry data
134 List of EntryInfo records that were written
136 image = Image.FromFile(image_fname)
138 # Output an entry to a single file, as a special case
141 raise ValueError('Must specify an entry path to write with -o')
142 if len(entry_paths) != 1:
143 raise ValueError('Must specify exactly one entry path to write with -o')
144 entry = image.FindEntryPath(entry_paths[0])
145 data = entry.ReadData(decomp)
146 tools.WriteFile(output_fname, data)
147 tout.Notice("Wrote %#x bytes to file '%s'" % (len(data), output_fname))
150 # Otherwise we will output to a path given by the entry path of each entry.
151 # This means that entries will appear in subdirectories if they are part of
153 einfos = image.GetListEntries(entry_paths)[0]
154 tout.Notice('%d entries match and will be written' % len(einfos))
157 data = entry.ReadData(decomp)
158 path = entry.GetPath()[1:]
159 fname = os.path.join(outdir, path)
161 # If this entry has children, create a directory for it and put its
162 # data in a file called 'root' in that directory
163 if entry.GetEntries():
164 if not os.path.exists(fname):
166 fname = os.path.join(fname, 'root')
167 tout.Notice("Write entry '%s' to '%s'" % (entry.GetPath(), fname))
168 tools.WriteFile(fname, data)
172 def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt):
173 """Prepare the images to be processed and select the device tree
176 - reads in the device tree
177 - finds and scans the binman node to create all entries
178 - selects which images to build
179 - Updates the device tress with placeholder properties for offset,
183 dtb_fname: Filename of the device tree file to use (.dts or .dtb)
184 selected_images: List of images to output, or None for all
185 update_fdt: True to update the FDT wth entry offsets, etc.
187 # Import these here in case libfdt.py is not available, in which case
188 # the above help option still works.
193 # Get the device tree ready by compiling it and copying the compiled
194 # output into a file in our output directly. Then scan it for use
196 dtb_fname = fdt_util.EnsureCompiled(dtb_fname)
197 fname = tools.GetOutputFilename('u-boot.dtb.out')
198 tools.WriteFile(fname, tools.ReadFile(dtb_fname))
199 dtb = fdt.FdtScan(fname)
201 node = _FindBinmanNode(dtb)
203 raise ValueError("Device tree '%s' does not have a 'binman' "
206 images = _ReadImageDesc(node)
210 new_images = OrderedDict()
211 for name, image in images.items():
212 if name in select_images:
213 new_images[name] = image
217 tout.Notice('Skipping images: %s' % ', '.join(skip))
219 state.Prepare(images, dtb)
221 # Prepare the device tree by making sure that any missing
222 # properties are added (e.g. 'pos' and 'size'). The values of these
223 # may not be correct yet, but we add placeholders so that the
224 # size of the device tree is correct. Later, in
225 # SetCalculatedProperties() we will insert the correct values
226 # without changing the device-tree size, thus ensuring that our
227 # entry offsets remain the same.
228 for image in images.values():
229 image.ExpandEntries()
231 image.AddMissingProperties()
232 image.ProcessFdt(dtb)
234 for dtb_item in state.GetAllFdts():
235 dtb_item.Sync(auto_resize=True)
241 def ProcessImage(image, update_fdt, write_map):
242 """Perform all steps for this image, including checking and # writing it.
244 This means that errors found with a later image will be reported after
245 earlier images are already completed and written, but that does not seem
249 image: Image to process
250 update_fdt: True to update the FDT wth entry offsets, etc.
251 write_map: True to write a map file
253 image.GetEntryContents()
254 image.GetEntryOffsets()
256 # We need to pack the entries to figure out where everything
257 # should be placed. This sets the offset/size of each entry.
258 # However, after packing we call ProcessEntryContents() which
259 # may result in an entry changing size. In that case we need to
260 # do another pass. Since the device tree often contains the
261 # final offset/size information we try to make space for this in
262 # AddMissingProperties() above. However, if the device is
263 # compressed we cannot know this compressed size in advance,
264 # since changing an offset from 0x100 to 0x104 (for example) can
265 # alter the compressed size of the device tree. So we need a
266 # third pass for this.
268 for pack_pass in range(passes):
273 except Exception as e:
275 fname = image.WriteMap()
276 print("Wrote map file '%s' to show errors" % fname)
280 image.SetCalculatedProperties()
281 for dtb_item in state.GetAllFdts():
283 sizes_ok = image.ProcessEntryContents()
288 image.Raise('Entries expanded after packing (tried %s passes)' %
298 """The main control code for binman
300 This assumes that help and test options have already been dealt with. It
301 deals with the core task of building images.
304 args: Command line arguments Namespace object
307 pager = os.getenv('PAGER')
310 fname = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
312 command.Run(pager, fname)
316 ListEntries(args.image, args.paths)
319 if args.cmd == 'extract':
321 tools.PrepareOutputDir(None)
322 ExtractEntries(args.image, args.filename, args.outdir, args.paths,
323 not args.uncompressed)
325 tools.FinaliseOutputDir()
328 # Try to figure out which device tree contains our image description
334 raise ValueError('Must provide a board to process (use -b <board>)')
335 board_pathname = os.path.join(args.build_dir, board)
336 dtb_fname = os.path.join(board_pathname, 'u-boot.dtb')
339 args.indir.append(board_pathname)
342 tout.Init(args.verbosity)
343 elf.debug = args.debug
344 cbfs_util.VERBOSE = args.verbosity > 2
345 state.use_fake_dtb = args.fake_dtb
347 tools.SetInputDirs(args.indir)
348 tools.PrepareOutputDir(args.outdir, args.preserve)
349 tools.SetToolPaths(args.toolpath)
350 state.SetEntryArgs(args.entry_arg)
352 images = PrepareImagesAndDtbs(dtb_fname, args.image,
354 for image in images.values():
355 ProcessImage(image, args.update_fdt, args.map)
357 # Write the updated FDTs to our output files
358 for dtb_item in state.GetAllFdts():
359 tools.WriteFile(dtb_item._fname, dtb_item.GetContents())
362 tools.FinaliseOutputDir()