def ProcessImage(image,
update_fdt,
write_map,
get_contents=True,
allow_resize=True):
"""Perform all steps for this image, including checking and # writing it.
This means that errors found with a later image will be reported after
earlier images are already completed and written, but that does not seem
important.
Args:
image: Image to process
update_fdt: True to update the FDT wth entry offsets, etc.
write_map: True to write a map file
get_contents: True to get the image contents from files, etc., False if
the contents is already present
allow_resize: True to allow entries to change size (this does a re-pack
of the entries), False to raise an exception
"""
if get_contents:
image.GetEntryContents()
image.GetEntryOffsets()
# We need to pack the entries to figure out where everything
# should be placed. This sets the offset/size of each entry.
# However, after packing we call ProcessEntryContents() which
# may result in an entry changing size. In that case we need to
# do another pass. Since the device tree often contains the
# final offset/size information we try to make space for this in
# AddMissingProperties() above. However, if the device is
# compressed we cannot know this compressed size in advance,
# since changing an offset from 0x100 to 0x104 (for example) can
# alter the compressed size of the device tree. So we need a
# third pass for this.
passes = 5
for pack_pass in range(passes):
try:
image.PackEntries()
image.CheckSize()
image.CheckEntries()
except Exception as e:
if write_map:
fname = image.WriteMap()
print("Wrote map file '%s' to show errors" % fname)
raise
image.SetImagePos()
if update_fdt:
image.SetCalculatedProperties()
for dtb_item in state.GetAllFdts():
dtb_item.Sync()
dtb_item.Flush()
sizes_ok = image.ProcessEntryContents()
if sizes_ok:
break
image.ResetForPack()
if not sizes_ok:
image.Raise('Entries changed size after packing (tried %s passes)' %
passes)
image.WriteSymbols()
image.BuildImage()
if write_map:
image.WriteMap()
def Binman(args):
"""The main control code for binman
This assumes that help and test options have already been dealt with. It
deals with the core task of building images.
Args:
args: Command line arguments Namespace object
"""
if args.full_help:
pager = os.getenv('PAGER')
if not pager:
pager = 'more'
fname = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
'README')
command.Run(pager, fname)
return 0
if args.cmd == 'ls':
try:
tools.PrepareOutputDir(None)
ListEntries(args.image, args.paths)
finally:
tools.FinaliseOutputDir()
return 0
if args.cmd == 'extract':
try:
tools.PrepareOutputDir(None)
ExtractEntries(args.image, args.filename, args.outdir, args.paths,
not args.uncompressed)
finally:
tools.FinaliseOutputDir()
return 0
if args.cmd == 'replace':
try:
tools.PrepareOutputDir(None)
ReplaceEntries(args.image,
args.filename,
args.indir,
args.paths,
do_compress=not args.compressed,
allow_resize=not args.fix_size,
write_map=args.map)
finally:
tools.FinaliseOutputDir()
return 0
# Try to figure out which device tree contains our image description
if args.dt:
dtb_fname = args.dt
else:
board = args.board
if not board:
raise ValueError(
'Must provide a board to process (use -b <board>)')
board_pathname = os.path.join(args.build_dir, board)
dtb_fname = os.path.join(board_pathname, 'u-boot.dtb')
if not args.indir:
args.indir = ['.']
args.indir.append(board_pathname)
try:
tout.Init(args.verbosity)
elf.debug = args.debug
cbfs_util.VERBOSE = args.verbosity > 2
state.use_fake_dtb = args.fake_dtb
try:
tools.SetInputDirs(args.indir)
tools.PrepareOutputDir(args.outdir, args.preserve)
tools.SetToolPaths(args.toolpath)
state.SetEntryArgs(args.entry_arg)
images = PrepareImagesAndDtbs(dtb_fname, args.image,
args.update_fdt)
for image in images.values():
ProcessImage(image, args.update_fdt, args.map)
# Write the updated FDTs to our output files
for dtb_item in state.GetAllFdts():
tools.WriteFile(dtb_item._fname, dtb_item.GetContents())
finally:
tools.FinaliseOutputDir()
finally:
tout.Uninit()
return 0
def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt):
"""Prepare the images to be processed and select the device tree
This function:
- reads in the device tree
- finds and scans the binman node to create all entries
- selects which images to build
- Updates the device tress with placeholder properties for offset,
image-pos, etc.
Args:
dtb_fname: Filename of the device tree file to use (.dts or .dtb)
selected_images: List of images to output, or None for all
update_fdt: True to update the FDT wth entry offsets, etc.
"""
# Import these here in case libfdt.py is not available, in which case
# the above help option still works.
import fdt
import fdt_util
global images
# Get the device tree ready by compiling it and copying the compiled
# output into a file in our output directly. Then scan it for use
# in binman.
dtb_fname = fdt_util.EnsureCompiled(dtb_fname)
fname = tools.GetOutputFilename('u-boot.dtb.out')
tools.WriteFile(fname, tools.ReadFile(dtb_fname))
dtb = fdt.FdtScan(fname)
node = _FindBinmanNode(dtb)
if not node:
raise ValueError("Device tree '%s' does not have a 'binman' "
"node" % dtb_fname)
images = _ReadImageDesc(node)
if select_images:
skip = []
new_images = OrderedDict()
for name, image in images.items():
if name in select_images:
new_images[name] = image
else:
skip.append(name)
images = new_images
tout.Notice('Skipping images: %s' % ', '.join(skip))
state.Prepare(images, dtb)
# Prepare the device tree by making sure that any missing
# properties are added (e.g. 'pos' and 'size'). The values of these
# may not be correct yet, but we add placeholders so that the
# size of the device tree is correct. Later, in
# SetCalculatedProperties() we will insert the correct values
# without changing the device-tree size, thus ensuring that our
# entry offsets remain the same.
for image in images.values():
image.ExpandEntries()
if update_fdt:
image.AddMissingProperties()
image.ProcessFdt(dtb)
for dtb_item in state.GetAllFdts():
dtb_item.Sync(auto_resize=True)
dtb_item.Pack()
dtb_item.Flush()
return images