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aee6bd69fe
Add a new crossystem value "battery_cutoff_request" to indicate that
next reboot should cut-off battery and shutdown during firmware stage.
This request is primarily for factories to ship devices in an safe
state. Previously we have done same thing by running "ectool battery-cutoff"
but that creates a problem which "ectool" (and the one to request for
cut-off) must live in developer mode while the device must be shipped
in normal mode. The mode transition was solved by setting
"disable_dev_request=1", but that flag is may get lost on x86 systems
(having NV storage in CMOS) when the battery is cut-off .
From the experience from Ryu, such settings (dev mode transition and
battery cut-off) should be done together inside firmware execution so we
can create a new flag, battery_cutoff_request, to finalize device
properly.
BRANCH=none
BUG=chromium:601705
TEST=emerge-chell depthcharge vboot_reference chromeos-bootimage
crossystem battery_cutoff_request=1
# Unplug AC adapter
reboot
# See device rebooted and then shutdown immediately.
# Press power button and system won't boot.
# Attach AC adapter and now system boots.
CQ-DEPEND=CL:337596,CL:338193
Change-Id: I73ccae15b337cd65786106646546c67c155b8fa6
Reviewed-on: https://chromium-review.googlesource.com/337602
Commit-Ready: Hung-Te Lin <hungte@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/* Copyright 2015 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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* Non-volatile storage bitfields
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*/
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#ifndef VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_
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#define VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_
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/*
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* Constants for NV storage. We use this rather than structs and bitfields so
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* the data format is consistent across platforms and compilers. Total NV
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* storage size is VB2_NVDATA_SIZE = 16 bytes.
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*
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* These constants must match the equivalent constants in
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* lib/vboot_nvstorage.c. (We currently don't share a common header file
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* because we're tring to keep the two libs independent, and we hope to
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* deprecate that one.)
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*/
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enum vb2_nv_offset {
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VB2_NV_OFFS_HEADER = 0,
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VB2_NV_OFFS_BOOT = 1,
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VB2_NV_OFFS_RECOVERY = 2,
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VB2_NV_OFFS_LOCALIZATION = 3,
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VB2_NV_OFFS_DEV = 4,
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VB2_NV_OFFS_TPM = 5,
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VB2_NV_OFFS_RECOVERY_SUBCODE = 6,
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VB2_NV_OFFS_BOOT2 = 7,
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VB2_NV_OFFS_MISC = 8,
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/* Offsets 9-10 are currently unused */
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VB2_NV_OFFS_KERNEL = 11, /* 11-14; field is 32 bits */
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/* CRC must be last field */
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VB2_NV_OFFS_CRC = 15
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};
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/* Fields in VB2_NV_OFFS_HEADER (unused = 0x07) */
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#define VB2_NV_HEADER_WIPEOUT 0x08
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#define VB2_NV_HEADER_KERNEL_SETTINGS_RESET 0x10
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#define VB2_NV_HEADER_FW_SETTINGS_RESET 0x20
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#define VB2_NV_HEADER_SIGNATURE 0x40
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#define VB2_NV_HEADER_MASK 0xc0
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/* Fields in VB2_NV_OFFS_BOOT */
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#define VB2_NV_BOOT_TRY_COUNT_MASK 0x0f
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#define VB2_NV_BOOT_BACKUP_NVRAM 0x10
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#define VB2_NV_BOOT_OPROM_NEEDED 0x20
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#define VB2_NV_BOOT_DISABLE_DEV 0x40
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#define VB2_NV_BOOT_DEBUG_RESET 0x80
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/* Fields in VB2_NV_OFFS_BOOT2 (unused = 0x80) */
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#define VB2_NV_BOOT2_RESULT_MASK 0x03
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#define VB2_NV_BOOT2_TRIED 0x04
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#define VB2_NV_BOOT2_TRY_NEXT 0x08
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#define VB2_NV_BOOT2_PREV_RESULT_MASK 0x30
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#define VB2_NV_BOOT2_PREV_RESULT_SHIFT 4 /* Number of bits to shift result */
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#define VB2_NV_BOOT2_PREV_TRIED 0x40
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/* Fields in VB2_NV_OFFS_DEV (unused = 0xc0) */
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#define VB2_NV_DEV_FLAG_USB 0x01
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#define VB2_NV_DEV_FLAG_SIGNED_ONLY 0x02
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#define VB2_NV_DEV_FLAG_LEGACY 0x04
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#define VB2_NV_DEV_FLAG_FASTBOOT_FULL_CAP 0x08
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#define VB2_NV_DEV_FLAG_DEFAULT_BOOT 0x30
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#define VB2_NV_DEV_DEFAULT_BOOT_SHIFT 4 /* Number of bits to shift */
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/* Fields in VB2_NV_OFFS_TPM (unused = 0xf8) */
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#define VB2_NV_TPM_CLEAR_OWNER_REQUEST 0x01
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#define VB2_NV_TPM_CLEAR_OWNER_DONE 0x02
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#define VB2_NV_TPM_REBOOTED 0x04
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/* Fields in VB2_NV_OFFS_MISC (unused = 0xf0) */
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#define VB2_NV_MISC_UNLOCK_FASTBOOT 0x01
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#define VB2_NV_MISC_BOOT_ON_AC_DETECT 0x02
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#define VB2_NV_MISC_TRY_RO_SYNC 0x04
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#define VB2_NV_MISC_BATTERY_CUTOFF 0x08
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#endif /* VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_ */
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