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- # SPDX-License-Identifier: GPL-2.0+
- # Copyright 2021 Google LLC
- # Written by Simon Glass <sjg@chromium.org>
- #
- # Support for a collection of entries from other parts of an image
- from collections import OrderedDict
- import os
- from binman.entry import Entry
- from dtoc import fdt_util
- class Entry_collection(Entry):
- """An entry which contains a collection of other entries
- Properties / Entry arguments:
- - content: List of phandles to entries to include
- This allows reusing the contents of other entries. The contents of the
- listed entries are combined to form this entry. This serves as a useful
- base class for entry types which need to process data from elsewhere in
- the image, not necessarily child entries.
- """
- def __init__(self, section, etype, node):
- super().__init__(section, etype, node)
- self.content = fdt_util.GetPhandleList(self._node, 'content')
- if not self.content:
- self.Raise("Collection must have a 'content' property")
- def GetContents(self, required):
- """Get the contents of this entry
- Args:
- required: True if the data must be present, False if it is OK to
- return None
- Returns:
- bytes content of the entry
- """
- # Join up all the data
- self.Info('Getting contents, required=%s' % required)
- data = bytearray()
- for entry_phandle in self.content:
- entry_data = self.section.GetContentsByPhandle(entry_phandle, self,
- required)
- if not required and entry_data is None:
- self.Info('Contents not available yet')
- # Data not available yet
- return None
- data += entry_data
- self.Info('Returning contents size %x' % len(data))
- return data
- def ObtainContents(self):
- data = self.GetContents(False)
- if data is None:
- return False
- self.SetContents(data)
- return True
- def ProcessContents(self):
- # The blob may have changed due to WriteSymbols()
- data = self.GetContents(True)
- return self.ProcessContentsUpdate(data)
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