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