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