2018-05-07 06:58:06 +09:00
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# SPDX-License-Identifier: GPL-2.0+
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2016-11-26 12:15:55 +09:00
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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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2020-04-18 09:09:03 +09:00
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from binman.entry import Entry
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from binman.etype.blob import Entry_blob
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2016-11-26 12:15:55 +09:00
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class Entry_x86_start16_spl(Entry_blob):
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2018-07-18 04:25:35 +09:00
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"""x86 16-bit start-up code for SPL
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Properties / Entry arguments:
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2019-08-24 22:22:49 +09:00
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- filename: Filename of spl/u-boot-x86-start16-spl.bin (default
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'spl/u-boot-x86-start16-spl.bin')
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2018-07-18 04:25:35 +09:00
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2019-08-24 22:22:49 +09:00
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x86 CPUs start up in 16-bit mode, even if they are 32-bit CPUs. This code
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must be placed in the top 64KB of the ROM. The reset code jumps to it. This
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entry holds that code. It is typically placed at offset
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CONFIG_SYS_X86_START16. The code is responsible for changing to 32-bit mode
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and jumping to U-Boot's entry point, which requires 32-bit mode (for 32-bit
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U-Boot).
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2018-07-18 04:25:35 +09:00
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2019-08-24 22:22:49 +09:00
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For 32-bit U-Boot, the 'x86-start16' entry type is used instead.
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2018-07-18 04:25:35 +09:00
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"""
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2018-06-02 00:38:14 +09:00
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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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2016-11-26 12:15:55 +09:00
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def GetDefaultFilename(self):
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2019-08-24 22:22:49 +09:00
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return 'spl/u-boot-x86-start16-spl.bin'
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