1# SPDX-License-Identifier: GPL-2.0+
2# Copyright (c) 2016 Google, Inc
3# Written by Simon Glass <sjg@chromium.org>
4#
5# Entry-type module for spl/u-boot-spl.bin
6#
7
8from binman import elf
9from binman.entry import Entry
10from binman.etype.blob import Entry_blob
11
12class Entry_u_boot_spl(Entry_blob):
13    """U-Boot SPL binary
14
15    Properties / Entry arguments:
16        - filename: Filename of u-boot-spl.bin (default 'spl/u-boot-spl.bin')
17
18    This is the U-Boot SPL (Secondary Program Loader) binary. This is a small
19    binary which loads before U-Boot proper, typically into on-chip SRAM. It is
20    responsible for locating, loading and jumping to U-Boot. Note that SPL is
21    not relocatable so must be loaded to the correct address in SRAM, or written
22    to run from the correct address if direct flash execution is possible (e.g.
23    on x86 devices).
24
25    SPL can access binman symbols at runtime. See:
26
27        'Access to binman entry offsets at run time (symbols)'
28
29    in the binman README for more information.
30
31    The ELF file 'spl/u-boot-spl' must also be available for this to work, since
32    binman uses that to look up symbols to write into the SPL binary.
33
34    Note that this entry is automatically replaced with u-boot-spl-expanded
35    unless --no-expanded is used or the node has a 'no-expanded' property.
36    """
37    def __init__(self, section, etype, node):
38        super().__init__(section, etype, node)
39        self.elf_fname = 'spl/u-boot-spl'
40
41    def GetDefaultFilename(self):
42        return 'spl/u-boot-spl.bin'
43
44    def WriteSymbols(self, section):
45        elf.LookupAndWriteSymbols(self.elf_fname, self, section.GetImage())
46