mirror of
https://github.com/brain-hackers/u-boot-brain
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3fb397bba0
At present only the more complex entries are documented. It is useful to have documentation for all entries in one place. As a first step, add and expand the documentation to cover all entries. Signed-off-by: Simon Glass <sjg@chromium.org>
31 lines
1.1 KiB
Python
31 lines
1.1 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2016 Google, Inc
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# Written by Simon Glass <sjg@chromium.org>
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#
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# Entry-type module for the 16-bit x86 start-up code for U-Boot SPL
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#
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from entry import Entry
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from blob import Entry_blob
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class Entry_x86_start16_spl(Entry_blob):
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"""x86 16-bit start-up code for SPL
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Properties / Entry arguments:
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- filename: Filename of spl/u-boot-x86-16bit-spl.bin (default
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'spl/u-boot-x86-16bit-spl.bin')
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x86 CPUs start up in 16-bit mode, even if they are 64-bit CPUs. This code
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must be placed at a particular address. This entry holds that code. It is
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typically placed at offset CONFIG_SYS_X86_START16. The code is responsible
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for changing to 32-bit mode and starting SPL, which in turn changes to
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64-bit mode and jumps to U-Boot (for 64-bit U-Boot).
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For 32-bit U-Boot, the 'x86_start16' entry type is used instead.
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"""
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def __init__(self, section, etype, node):
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Entry_blob.__init__(self, section, etype, node)
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def GetDefaultFilename(self):
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return 'spl/u-boot-x86-16bit-spl.bin'
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