cd49cce7b7
This patch is a raw application of find src/ -type f | xargs sed -i -e 's/IS_ENABLED\s*(CONFIG_/CONFIG(/g' Change-Id: I6262d6d5c23cabe23c242b4f38d446b74fe16b88 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31774 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
|
|
*
|
|
* 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 <console/console.h>
|
|
#include <types.h>
|
|
#include <pc80/mc146818rtc.h>
|
|
#include <security/vboot/vbnv.h>
|
|
#include <security/vboot/vbnv_layout.h>
|
|
|
|
static void clear_vbnv_battery_cutoff_flag(uint8_t *vbnv_copy)
|
|
{
|
|
/*
|
|
* Currently battery cutoff is done in payload stage, which does not
|
|
* update backup VBNV. And doing battery cutoff will invalidate CMOS.
|
|
* This means for every reboot after cutoff, read_vbnv_cmos will reload
|
|
* backup VBNV and try to cutoff again, causing endless reboot loop.
|
|
* So we should always clear battery cutoff flag from loaded backup.
|
|
*/
|
|
if (vbnv_copy[MISC_FLAGS_OFFSET] & MISC_FLAGS_BATTERY_CUTOFF_MASK) {
|
|
printk(BIOS_INFO, "VBNV: Remove battery cut-off request.\n");
|
|
vbnv_copy[MISC_FLAGS_OFFSET] &= ~MISC_FLAGS_BATTERY_CUTOFF_MASK;
|
|
regen_vbnv_crc(vbnv_copy);
|
|
}
|
|
}
|
|
|
|
/* Return non-zero if backup was used. */
|
|
static int restore_from_backup(uint8_t *vbnv_copy)
|
|
{
|
|
if (!CONFIG(VBOOT_VBNV_CMOS_BACKUP_TO_FLASH))
|
|
return 0;
|
|
|
|
printk(BIOS_INFO, "VBNV: CMOS invalid, restoring from flash\n");
|
|
read_vbnv_flash(vbnv_copy);
|
|
|
|
if (verify_vbnv(vbnv_copy)) {
|
|
clear_vbnv_battery_cutoff_flag(vbnv_copy);
|
|
save_vbnv_cmos(vbnv_copy);
|
|
printk(BIOS_INFO, "VBNV: Flash backup restored\n");
|
|
return 1;
|
|
}
|
|
|
|
printk(BIOS_INFO, "VBNV: Restore from flash failed\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
void read_vbnv_cmos(uint8_t *vbnv_copy)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < VBOOT_VBNV_BLOCK_SIZE; i++)
|
|
vbnv_copy[i] = cmos_read(CONFIG_VBOOT_VBNV_OFFSET + 14 + i);
|
|
|
|
/* Verify contents before attempting a restore from backup storage. */
|
|
if (verify_vbnv(vbnv_copy))
|
|
return;
|
|
|
|
restore_from_backup(vbnv_copy);
|
|
}
|
|
|
|
void save_vbnv_cmos(const uint8_t *vbnv_copy)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < VBOOT_VBNV_BLOCK_SIZE; i++)
|
|
cmos_write(vbnv_copy[i], CONFIG_VBOOT_VBNV_OFFSET + 14 + i);
|
|
}
|
|
|
|
void vbnv_init_cmos(uint8_t *vbnv_copy)
|
|
{
|
|
/* If no cmos failure just defer to the normal read path for checking
|
|
vbnv contents' integrity. */
|
|
if (!vbnv_cmos_failed())
|
|
return;
|
|
|
|
/* In the case of cmos failure force the backup. If backup wasn't used
|
|
force the vbnv cmos to be reset. */
|
|
if (!restore_from_backup(vbnv_copy)) {
|
|
vbnv_reset(vbnv_copy);
|
|
/* This parallels the vboot_reference implementation. */
|
|
vbnv_copy[HEADER_OFFSET] = HEADER_SIGNATURE |
|
|
HEADER_FIRMWARE_SETTINGS_RESET |
|
|
HEADER_KERNEL_SETTINGS_RESET;
|
|
regen_vbnv_crc(vbnv_copy);
|
|
save_vbnv_cmos(vbnv_copy);
|
|
}
|
|
}
|
|
|
|
#if CONFIG(VBOOT_VBNV_CMOS_BACKUP_TO_FLASH)
|
|
static void back_up_vbnv_cmos(void *unused)
|
|
{
|
|
uint8_t vbnv_cmos[VBOOT_VBNV_BLOCK_SIZE];
|
|
|
|
/* Read current VBNV from CMOS. */
|
|
read_vbnv_cmos(vbnv_cmos);
|
|
|
|
/* Save to flash, will only be saved if different. */
|
|
save_vbnv_flash(vbnv_cmos);
|
|
}
|
|
BOOT_STATE_INIT_ENTRY(BS_POST_DEVICE, BS_ON_EXIT, back_up_vbnv_cmos, NULL);
|
|
#endif
|