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# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2018 Google, Inc
# Written by Simon Glass <sjg@chromium.org>
#
# Entry-type module for the 16-bit x86 start-up code for U-Boot TPL
#
from entry import Entry
from blob import Entry_blob
class Entry_x86_start16_tpl(Entry_blob):
"""x86 16-bit start-up code for TPL
Properties / Entry arguments:
- filename: Filename of tpl/u-boot-x86-start16-tpl.bin (default
'tpl/u-boot-x86-start16-tpl.bin')
x86 CPUs start up in 16-bit mode, even if they are 32-bit CPUs. This code
must be placed in the top 64KB of the ROM. The reset code jumps to it. 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).
If TPL is not being used, the 'x86-start16-spl or 'x86-start16' entry types
may be used instead.
"""
def __init__(self, section, etype, node):
Entry_blob.__init__(self, section, etype, node)
def GetDefaultFilename(self):
return 'tpl/u-boot-x86-start16-tpl.bin'
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