60 lines
2.2 KiB
Bash
Executable File
60 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright 2017 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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#
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# This script provides tools to read or change GBB flags on a live system.
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SCRIPT_BASE="$(dirname "$0")"
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. "${SCRIPT_BASE}/common_minimal.sh"
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load_shflags || exit 1
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# Globals
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# ----------------------------------------------------------------------------
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# Values from vboot_reference/firmware/2lib/include/2gbb_flags.h
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GBBFLAGS_DESCRIPTION_PREFIX="
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Defined flags (some values may be not supported by all systems):
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"
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GBBFLAGS_LIST="
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VB2_GBB_FLAG_DEV_SCREEN_SHORT_DELAY 0x00000001
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VB2_GBB_FLAG_LOAD_OPTION_ROMS 0x00000002
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VB2_GBB_FLAG_ENABLE_ALTERNATE_OS 0x00000004
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VB2_GBB_FLAG_FORCE_DEV_SWITCH_ON 0x00000008
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VB2_GBB_FLAG_FORCE_DEV_BOOT_USB 0x00000010
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VB2_GBB_FLAG_DISABLE_FW_ROLLBACK_CHECK 0x00000020
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VB2_GBB_FLAG_ENTER_TRIGGERS_TONORM 0x00000040
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VB2_GBB_FLAG_FORCE_DEV_BOOT_LEGACY 0x00000080
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VB2_GBB_FLAG_RUNNING_FAFT 0x00000100
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VB2_GBB_FLAG_DISABLE_EC_SOFTWARE_SYNC 0x00000200
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VB2_GBB_FLAG_DEFAULT_DEV_BOOT_LEGACY 0x00000400
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VB2_GBB_FLAG_DISABLE_AUXFW_SOFTWARE_SYNC 0x00000800
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VB2_GBB_FLAG_DISABLE_LID_SHUTDOWN 0x00001000
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VB2_GBB_FLAG_FORCE_MANUAL_RECOVERY 0x00004000
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VB2_GBB_FLAG_DISABLE_FWMP 0x00008000
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VB2_GBB_FLAG_ENABLE_UDC 0x00010000
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"
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GBBFLAGS_DESCRIPTION_SUFFIX="
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To get a developer-friendly device, try 0x11 (short_delay + boot_usb).
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For factory-related tests (always DEV), try 0x39.
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For early development (disable EC/auxfw software sync), try 0xa39.
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"
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GBBFLAGS_DESCRIPTION="${GBBFLAGS_DESCRIPTION_PREFIX}${GBBFLAGS_LIST}"
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GBBFLAGS_DESCRIPTION="${GBBFLAGS_DESCRIPTION}${GBBFLAGS_DESCRIPTION_SUFFIX}"
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FLAGS_HELP="Manages Chrome OS Firmware GBB Flags value.
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Usage: $0 [option_flags] GBB_FLAGS_VALUE
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${GBBFLAGS_DESCRIPTION}"
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flashrom_read() {
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flashrom -p host -i GBB -r "$@"
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}
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flashrom_write() {
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flashrom -p host -i GBB --fast-verify -w "$@"
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}
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