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Once binman has packed the image, the position and size of each entry is known. It is then possible for binman to update the device tree with these positions. Since placeholder values have been added, this does not affect the size of the device tree and therefore the packing does not need to be performed again. Add a new SetCalculatedProperties method to handle this. Signed-off-by: Simon Glass <sjg@chromium.org>
125 lines
4.1 KiB
Python
125 lines
4.1 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2016 Google, Inc
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# Written by Simon Glass <sjg@chromium.org>
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#
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# Class for an image, the output of binman
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#
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from __future__ import print_function
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from collections import OrderedDict
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from operator import attrgetter
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import re
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import sys
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import fdt_util
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import bsection
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import tools
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class Image:
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"""A Image, representing an output from binman
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An image is comprised of a collection of entries each containing binary
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data. The image size must be large enough to hold all of this data.
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This class implements the various operations needed for images.
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Atrtributes:
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_node: Node object that contains the image definition in device tree
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_name: Image name
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_size: Image size in bytes, or None if not known yet
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_filename: Output filename for image
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_sections: Sections present in this image (may be one or more)
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Args:
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test: True if this is being called from a test of Images. This this case
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there is no device tree defining the structure of the section, so
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we create a section manually.
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"""
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def __init__(self, name, node, test=False):
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self._node = node
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self._name = name
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self._size = None
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self._filename = '%s.bin' % self._name
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if test:
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self._section = bsection.Section('main-section', self._node, True)
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else:
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self._ReadNode()
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def _ReadNode(self):
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"""Read properties from the image node"""
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self._size = fdt_util.GetInt(self._node, 'size')
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filename = fdt_util.GetString(self._node, 'filename')
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if filename:
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self._filename = filename
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self._section = bsection.Section('main-section', self._node)
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def AddMissingProperties(self):
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"""Add properties that are not present in the device tree
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When binman has completed packing the entries the position and size of
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each entry are known. But before this the device tree may not specify
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these. Add any missing properties, with a dummy value, so that the
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size of the entry is correct. That way we can insert the correct values
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later.
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"""
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self._section.AddMissingProperties()
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def ProcessFdt(self, fdt):
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return self._section.ProcessFdt(fdt)
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def GetEntryContents(self):
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"""Call ObtainContents() for the section
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"""
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self._section.GetEntryContents()
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def GetEntryPositions(self):
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"""Handle entries that want to set the position/size of other entries
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This calls each entry's GetPositions() method. If it returns a list
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of entries to update, it updates them.
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"""
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self._section.GetEntryPositions()
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def PackEntries(self):
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"""Pack all entries into the image"""
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self._section.PackEntries()
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def CheckSize(self):
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"""Check that the image contents does not exceed its size, etc."""
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self._size = self._section.CheckSize()
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def CheckEntries(self):
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"""Check that entries do not overlap or extend outside the image"""
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self._section.CheckEntries()
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def SetCalculatedProperties(self):
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self._section.SetCalculatedProperties()
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def ProcessEntryContents(self):
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"""Call the ProcessContents() method for each entry
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This is intended to adjust the contents as needed by the entry type.
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"""
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self._section.ProcessEntryContents()
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def WriteSymbols(self):
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"""Write symbol values into binary files for access at run time"""
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self._section.WriteSymbols()
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def BuildImage(self):
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"""Write the image to a file"""
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fname = tools.GetOutputFilename(self._filename)
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with open(fname, 'wb') as fd:
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self._section.BuildSection(fd, 0)
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def GetEntries(self):
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return self._section.GetEntries()
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def WriteMap(self):
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"""Write a map of the image to a .map file"""
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filename = '%s.map' % self._name
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fname = tools.GetOutputFilename(filename)
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with open(fname, 'w') as fd:
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print('%8s %8s %s' % ('Position', 'Size', 'Name'), file=fd)
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self._section.WriteMap(fd, 0)
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