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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 the 16-bit x86 start-up code for U-Boot
#
from entry import Entry
from blob import Entry_blob
class Entry_x86_start16(Entry_blob):
"""x86 16-bit start-up code for U-Boot
Properties / Entry arguments:
- filename: Filename of u-boot-x86-16bit.bin (default
'u-boot-x86-16bit.bin')
x86 CPUs start up in 16-bit mode, even if they are 32-bit CPUs. This code
must be placed at a particular address. This entry holds that code. It is
typically placed at offset CONFIG_SYS_X86_START16. The code is responsible
for changing to 32-bit mode and jumping to U-Boot's entry point, which
requires 32-bit mode (for 32-bit U-Boot).
For 64-bit U-Boot, the 'x86_start16_spl' entry type is used instead.
"""
def __init__(self, section, etype, node):
Entry_blob.__init__(self, section, etype, node)
def GetDefaultFilename(self):
return 'u-boot-x86-16bit.bin'
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