63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2015 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <bootstate.h>
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#include <vendorcode/google/chromeos/vboot_handoff.h>
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static int is_recovery; /* flag to identify recovery mode */
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/*
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* coreboot used to clear recovery status towards romstage end after FSP
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* memory init. Later inside FSP silicon init due to HSIO CRC mismatch
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* or other silicon related programming may request for an additional
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* reset. Thus on the next boot the system resumed in normal mode rather than
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* recovery because it lost its original state due to FSP silicon init reset.
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* Hence it needs an addition reset to get into old state and continue
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* booting into recovery mode. This function will set recovery reason
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* during Silicon init, in case of recovery mode booting,
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* so, system will not lose its original context.
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*/
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static void set_recovery_request(void *unused)
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{
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is_recovery = recovery_mode_enabled();
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/*
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* Set recovery flag during Recovery Mode Silicon Init
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* & store recovery request into VBNV
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*/
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if (is_recovery)
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set_recovery_mode_into_vbnv(vboot_recovery_reason());
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}
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static void clear_recovery_request(void *unused)
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{
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/*
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* Done with Silicon Init, it's safe to clear
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* reset request now with assumption that no reset occurs hereafter
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* so we will not miss original data.
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*/
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if (is_recovery)
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set_recovery_mode_into_vbnv(0);
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}
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/*
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* On Recovery Path Set Recovery Request during early RAMSTAGE
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* before initiated Silicon Init
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*/
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BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, set_recovery_request, NULL);
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/*
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* On Recovery Path Clear Recovery Request during early RAMSTAGE
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* end of Silicon Init
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*/
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BOOT_STATE_INIT_ENTRY(BS_DEV_INIT_CHIPS, BS_ON_EXIT, clear_recovery_request, NULL);
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