+# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2016 Google, Inc
# Written by Simon Glass <sjg@chromium.org>
#
-# SPDX-License-Identifier: GPL-2.0+
-#
# Entry-type module for spl/u-boot-spl.bin
#
+import elf
+
from entry import Entry
from blob import Entry_blob
class Entry_u_boot_spl(Entry_blob):
- def __init__(self, image, etype, node):
- Entry_blob.__init__(self, image, etype, node)
+ """U-Boot SPL binary
+
+ Properties / Entry arguments:
+ - filename: Filename of u-boot-spl.bin (default 'spl/u-boot-spl.bin')
+
+ This is the U-Boot SPL (Secondary Program Loader) binary. This is a small
+ binary which loads before U-Boot proper, typically into on-chip SRAM. It is
+ responsible for locating, loading and jumping to U-Boot. 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 'spl/u-boot-spl' must also be available for this to work, since
+ binman uses that to look up symbols to write into the SPL binary.
+ """
+ def __init__(self, section, etype, node):
+ Entry_blob.__init__(self, section, etype, node)
+ self.elf_fname = 'spl/u-boot-spl'
def GetDefaultFilename(self):
return 'spl/u-boot-spl.bin'
+
+ def WriteSymbols(self, section):
+ elf.LookupAndWriteSymbols(self.elf_fname, self, section)