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https://github.com/brain-hackers/u-boot-brain
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bf776679a7
At present patman sets the python path on startup so that it can access the libraries it needs. If we convert to use absolute imports this is not necessary. Move patman to use absolute imports. This requires changes in tools which use the patman libraries (which is most of them). Signed-off-by: Simon Glass <sjg@chromium.org>
69 lines
2.5 KiB
Python
69 lines
2.5 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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# Entry-type module for blobs, which are binary objects read from files
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#
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from binman.entry import Entry
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from dtoc import fdt_util
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from patman import tools
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from patman import tout
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class Entry_blob(Entry):
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"""Entry containing an arbitrary binary blob
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Note: This should not be used by itself. It is normally used as a parent
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class by other entry types.
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Properties / Entry arguments:
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- filename: Filename of file to read into entry
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- compress: Compression algorithm to use:
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none: No compression
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lz4: Use lz4 compression (via 'lz4' command-line utility)
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This entry reads data from a file and places it in the entry. The
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default filename is often specified specified by the subclass. See for
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example the 'u_boot' entry which provides the filename 'u-boot.bin'.
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If compression is enabled, an extra 'uncomp-size' property is written to
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the node (if enabled with -u) which provides the uncompressed size of the
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data.
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"""
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def __init__(self, section, etype, node):
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Entry.__init__(self, section, etype, node)
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self._filename = fdt_util.GetString(self._node, 'filename', self.etype)
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self.compress = fdt_util.GetString(self._node, 'compress', 'none')
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def ObtainContents(self):
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self._filename = self.GetDefaultFilename()
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self._pathname = tools.GetInputFilename(self._filename)
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self.ReadBlobContents()
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return True
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def CompressData(self, indata):
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if self.compress != 'none':
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self.uncomp_size = len(indata)
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data = tools.Compress(indata, self.compress)
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return data
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def ReadBlobContents(self):
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"""Read blob contents into memory
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This function compresses the data before storing if needed.
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We assume the data is small enough to fit into memory. If this
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is used for large filesystem image that might not be true.
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In that case, Image.BuildImage() could be adjusted to use a
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new Entry method which can read in chunks. Then we could copy
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the data in chunks and avoid reading it all at once. For now
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this seems like an unnecessary complication.
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"""
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indata = tools.ReadFile(self._pathname)
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data = self.CompressData(indata)
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self.SetContents(data)
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return True
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def GetDefaultFilename(self):
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return self._filename
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