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https://github.com/brain-hackers/u-boot-brain
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2090f1e3d0
At present we only support symbols inside binaries which are at the top level of an image. This restrictions seems unreasonable since more complex images may want to group binaries within different sections. Relax the restriction, adding a new _SetupTplElf() helper function. Also fix a typo in the comment for testTpl(). Signed-off-by: Simon Glass <sjg@chromium.org>
44 lines
1.4 KiB
Python
44 lines
1.4 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 tpl/u-boot-tpl.bin
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#
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import elf
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from entry import Entry
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from blob import Entry_blob
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class Entry_u_boot_tpl(Entry_blob):
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"""U-Boot TPL binary
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Properties / Entry arguments:
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- filename: Filename of u-boot-tpl.bin (default 'tpl/u-boot-tpl.bin')
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This is the U-Boot TPL (Tertiary Program Loader) binary. This is a small
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binary which loads before SPL, typically into on-chip SRAM. It is
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responsible for locating, loading and jumping to SPL, the next-stage
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loader. Note that SPL is not relocatable so must be loaded to the correct
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address in SRAM, or written to run from the correct address if direct
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flash execution is possible (e.g. on x86 devices).
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SPL can access binman symbols at runtime. See:
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'Access to binman entry offsets at run time (symbols)'
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in the binman README for more information.
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The ELF file 'tpl/u-boot-tpl' must also be available for this to work, since
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binman uses that to look up symbols to write into the TPL binary.
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"""
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def __init__(self, section, etype, node):
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Entry_blob.__init__(self, section, etype, node)
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self.elf_fname = 'tpl/u-boot-tpl'
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def GetDefaultFilename(self):
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return 'tpl/u-boot-tpl.bin'
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def WriteSymbols(self, section):
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elf.LookupAndWriteSymbols(self.elf_fname, self, section.GetImage())
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