mirror of
https://github.com/brain-hackers/u-boot-brain
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adc59eaff7
Several entries currently use an underscore in the entry-type name, but in fact a hyphen is used. Update the docs to fix this as it might be confusing. Also simplify the 'filename' comment and fix the 'operation' typo. Signed-off-by: Simon Glass <sjg@chromium.org>
93 lines
3.5 KiB
Python
93 lines
3.5 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 U-Boot device tree with the microcode removed
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#
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from binman.entry import Entry
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from binman.etype.blob_dtb import Entry_blob_dtb
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from patman import tools
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class Entry_u_boot_dtb_with_ucode(Entry_blob_dtb):
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"""A U-Boot device tree file, with the microcode removed
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Properties / Entry arguments:
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- filename: Filename of u-boot.dtb (default 'u-boot.dtb')
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See Entry_u_boot_ucode for full details of the three entries involved in
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this process. This entry provides the U-Boot device-tree file, which
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contains the microcode. If the microcode is not being collated into one
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place then the offset and size of the microcode is recorded by this entry,
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for use by u-boot-with-ucode_ptr. If it is being collated, then this
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entry deletes the microcode from the device tree (to save space) and makes
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it available to u-boot-ucode.
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"""
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def __init__(self, section, etype, node):
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# Put this here to allow entry-docs and help to work without libfdt
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global state
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from binman import state
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super().__init__(section, etype, node)
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self.ucode_data = b''
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self.collate = False
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self.ucode_offset = None
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self.ucode_size = None
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self.ucode = None
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self.ready = False
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def GetDefaultFilename(self):
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return 'u-boot.dtb'
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def GetFdtEtype(self):
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return 'u-boot-dtb'
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def ProcessFdt(self, fdt):
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# So the module can be loaded without it
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from dtoc import fdt
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# If the section does not need microcode, there is nothing to do
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ucode_dest_entry = self.section.FindEntryType(
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'u-boot-spl-with-ucode-ptr')
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if not ucode_dest_entry or not ucode_dest_entry.target_offset:
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ucode_dest_entry = self.section.FindEntryType(
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'u-boot-tpl-with-ucode-ptr')
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if not ucode_dest_entry or not ucode_dest_entry.target_offset:
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ucode_dest_entry = self.section.FindEntryType(
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'u-boot-with-ucode-ptr')
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if not ucode_dest_entry or not ucode_dest_entry.target_offset:
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return True
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# Remove the microcode
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etype = self.GetFdtEtype()
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fdt = state.GetFdtForEtype(etype)
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self.ucode = fdt.GetNode('/microcode')
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if not self.ucode:
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raise self.Raise("No /microcode node found in '%s'" % etype)
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# There's no need to collate it (move all microcode into one place)
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# if we only have one chunk of microcode.
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self.collate = len(self.ucode.subnodes) > 1
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for node in self.ucode.subnodes:
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data_prop = node.props.get('data')
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if data_prop:
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self.ucode_data += data_prop.bytes
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if self.collate:
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node.DeleteProp('data')
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return True
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def ObtainContents(self):
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# Call the base class just in case it does something important.
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super().ObtainContents()
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if self.ucode and not self.collate:
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for node in self.ucode.subnodes:
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data_prop = node.props.get('data')
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if data_prop:
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# Find the offset in the device tree of the ucode data
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self.ucode_offset = data_prop.GetOffset() + 12
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self.ucode_size = len(data_prop.bytes)
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self.ready = True
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else:
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self.ready = True
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return self.ready
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