2a12e2e8da
VBOOT_VERIFY_FIRMWARE should be independent of CHROMEOS. This allows use of verified boot library without having to stick to CHROMEOS. BUG=chrome-os-partner:55639 Change-Id: Ia2c328712caedd230ab295b8a613e3c1ed1532d9 Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/15867 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
79 lines
2 KiB
C
79 lines
2 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
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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 <console/console.h>
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#include <types.h>
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#include <pc80/mc146818rtc.h>
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#include <vboot/vbnv.h>
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#include <vboot/vbnv_layout.h>
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void read_vbnv_cmos(uint8_t *vbnv_copy)
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{
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int i;
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for (i = 0; i < VBOOT_VBNV_BLOCK_SIZE; i++)
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vbnv_copy[i] = cmos_read(CONFIG_VBOOT_VBNV_OFFSET + 14 + i);
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if (IS_ENABLED(CONFIG_VBOOT_VBNV_CMOS_BACKUP_TO_FLASH)) {
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if (verify_vbnv(vbnv_copy))
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return;
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printk(BIOS_INFO, "VBNV: CMOS invalid, restoring from flash\n");
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read_vbnv_flash(vbnv_copy);
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if (verify_vbnv(vbnv_copy)) {
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save_vbnv_cmos(vbnv_copy);
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printk(BIOS_INFO, "VBNV: Flash backup restored\n");
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} else {
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printk(BIOS_INFO, "VBNV: Restore from flash failed\n");
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}
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}
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}
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void save_vbnv_cmos(const uint8_t *vbnv_copy)
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{
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int i;
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for (i = 0; i < VBOOT_VBNV_BLOCK_SIZE; i++)
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cmos_write(vbnv_copy[i], CONFIG_VBOOT_VBNV_OFFSET + 14 + i);
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}
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void init_vbnv_cmos(int rtc_fail)
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{
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uint8_t vbnv[VBOOT_VBNV_BLOCK_SIZE];
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if (rtc_fail)
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read_vbnv_cmos(vbnv);
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cmos_init(rtc_fail);
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if (rtc_fail)
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save_vbnv_cmos(vbnv);
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}
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#if IS_ENABLED(CONFIG_VBOOT_VBNV_CMOS_BACKUP_TO_FLASH)
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static void back_up_vbnv_cmos(void *unused)
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{
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uint8_t vbnv_cmos[VBOOT_VBNV_BLOCK_SIZE];
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/* Read current VBNV from CMOS. */
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read_vbnv_cmos(vbnv_cmos);
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/* Save to flash, will only be saved if different. */
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save_vbnv_flash(vbnv_cmos);
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}
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BOOT_STATE_INIT_ENTRY(BS_POST_DEVICE, BS_ON_EXIT, back_up_vbnv_cmos, NULL);
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#endif
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