# 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-x86-16bit-tpl.bin (default
            'tpl/u-boot-x86-16bit-tpl.bin')

    x86 CPUs start up in 16-bit mode, even if they are 64-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 starting TPL, which in turn jumps to SPL.

    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-x86-16bit-tpl.bin'