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- # SPDX-License-Identifier: GPL-2.0+
- # Copyright (c) 2016 Google, Inc
- # Written by Simon Glass <sjg@chromium.org>
- #
- # Entry-type module for tpl/u-boot-tpl.bin
- #
- import elf
- from entry import Entry
- from blob import Entry_blob
- class Entry_u_boot_tpl(Entry_blob):
- """U-Boot TPL binary
- Properties / Entry arguments:
- - filename: Filename of u-boot-tpl.bin (default 'tpl/u-boot-tpl.bin')
- This is the U-Boot TPL (Tertiary Program Loader) binary. This is a small
- binary which loads before SPL, typically into on-chip SRAM. It is
- responsible for locating, loading and jumping to SPL, the next-stage
- loader. Note that SPL is not relocatable so must be loaded to the correct
- address in SRAM, or written to run from the correct address if direct
- flash execution is possible (e.g. on x86 devices).
- SPL can access binman symbols at runtime. See:
- 'Access to binman entry offsets at run time (symbols)'
- in the binman README for more information.
- The ELF file 'tpl/u-boot-tpl' must also be available for this to work, since
- binman uses that to look up symbols to write into the TPL binary.
- """
- def __init__(self, section, etype, node):
- Entry_blob.__init__(self, section, etype, node)
- self.elf_fname = 'tpl/u-boot-tpl'
- def GetDefaultFilename(self):
- return 'tpl/u-boot-tpl.bin'
- def WriteSymbols(self, section):
- elf.LookupAndWriteSymbols(self.elf_fname, self, section.GetImage())
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