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coreboot-kgpe-d16/src/vboot/vbnv.h

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chromeos: Add vbnv wrapper for the different backends Add a wrapper around the vbnv implementations and call into the different backend functions from there. Also move some of the common functions to the common code and simplify the backend drivers. This will allow some of the code to be re-used so the CMOS backend can backup the data into the flash backend. One side effect of this is that the cache of VBNV was removed from CMOS and EC backends and moved into the VBNV wrapper, but the flash backend also still has a separate cache because it has more state and complexity in the implementation. The wrapper cached data is not used for normal vbnv_read/vbnv_write because some callers need the ability to force a write if the backend storage is cleared (i.e. CMOS clear). BUG=chrome-os-partner:47915 BRANCH=glados TEST=build and boot on chell Change-Id: I4d2e0e99af7e8a44aec77ad9991507401babcca6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: c30f60434a64f6c0eb9ede45d48ddafff19dd24f Original-Change-Id: Ia97f6607c5ad837b9aa10b45211137221ccb93a0 Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/324120 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/13597 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-01-26 02:13:27 +01:00
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Google Inc.
*
* 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.
*/
vboot: Separate vboot from chromeos 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>
2016-07-25 20:48:03 +02:00
#ifndef __VBOOT_VBNV_H__
#define __VBOOT_VBNV_H__
chromeos: Add vbnv wrapper for the different backends Add a wrapper around the vbnv implementations and call into the different backend functions from there. Also move some of the common functions to the common code and simplify the backend drivers. This will allow some of the code to be re-used so the CMOS backend can backup the data into the flash backend. One side effect of this is that the cache of VBNV was removed from CMOS and EC backends and moved into the VBNV wrapper, but the flash backend also still has a separate cache because it has more state and complexity in the implementation. The wrapper cached data is not used for normal vbnv_read/vbnv_write because some callers need the ability to force a write if the backend storage is cleared (i.e. CMOS clear). BUG=chrome-os-partner:47915 BRANCH=glados TEST=build and boot on chell Change-Id: I4d2e0e99af7e8a44aec77ad9991507401babcca6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: c30f60434a64f6c0eb9ede45d48ddafff19dd24f Original-Change-Id: Ia97f6607c5ad837b9aa10b45211137221ccb93a0 Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/324120 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/13597 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-01-26 02:13:27 +01:00
#include <types.h>
/* Generic functions */
vbnv: Do not initialize vbnv_copy in vbnv layer If read_vbnv finds that the vbnv_copy is not valid, it initializes it with the correct HEADER_SIGNATURE and other attributes. However, the vbnv copy is checked for validity and initialized at the vboot layer as well. Since, vboot is the owner of this data, it should be the one initializing it. Thus, if read_vbnv sees that the data is not valid, simply reset it to all 0s and let vboot layer take care of it. This also removes the need for additional checks to ensure that the dirty vbnv copy is properly updated on storage. Change-Id: I6101ac41f31f720a6e357c9c56e571d62e0f2f47 Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/15498 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Julius Werner <jwerner@chromium.org>
2016-06-29 20:26:27 +02:00
void read_vbnv(uint8_t *vbnv_copy);
chromeos: Add vbnv wrapper for the different backends Add a wrapper around the vbnv implementations and call into the different backend functions from there. Also move some of the common functions to the common code and simplify the backend drivers. This will allow some of the code to be re-used so the CMOS backend can backup the data into the flash backend. One side effect of this is that the cache of VBNV was removed from CMOS and EC backends and moved into the VBNV wrapper, but the flash backend also still has a separate cache because it has more state and complexity in the implementation. The wrapper cached data is not used for normal vbnv_read/vbnv_write because some callers need the ability to force a write if the backend storage is cleared (i.e. CMOS clear). BUG=chrome-os-partner:47915 BRANCH=glados TEST=build and boot on chell Change-Id: I4d2e0e99af7e8a44aec77ad9991507401babcca6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: c30f60434a64f6c0eb9ede45d48ddafff19dd24f Original-Change-Id: Ia97f6607c5ad837b9aa10b45211137221ccb93a0 Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/324120 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/13597 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-01-26 02:13:27 +01:00
void save_vbnv(const uint8_t *vbnv_copy);
int verify_vbnv(uint8_t *vbnv_copy);
vboot: Clear battery cutoff flags when vbnv_cmos loads backup VBNV. When CONFIG_VBOOT_VBNV_CMOS_BACKUP_TO_FLASH is set, vbnv_cmos will try to load VBNV from flash if the VBNV in CMOS is invalid. This is usually correct, except the case of battery cut-off. CMOS will always be invalid after battery cut-off if there is no RTC battery (or if that is dead). However, in current implementation the backup in flash is only updated in coreboot, while the real battery cutoff (and the clearing of cutoff flags in VBNV) is done in payload (Depthcharge) stage. This will create an endless reboot loop that: 1. crossystem sets battery cutoff flag in VBNV_CMOS then reboot. 2. coreboot backs-up VBNV_CMOS to VBNV_flash. 3. Depthcharge sees cutoff flag in VBNV_CMOS. 4. Depthcharge clears cutoff flag in VBNV_CMOS. 5. Depthcharge performs battery cutoff (CMOS data is lost). 6. (Plug AC adapter) Reboot. 7. Coreboot sees invalid VBNV_CMOS, load backup from VBNV_flash. 8. Jump to 3. As a result, we should always clear battery cutoff flags when loading backups from VBNV_flash. BRANCH=glados,reef BUG=chrome-os-partner:61365,chrome-os-partner:59615 TEST=emerge-reef coreboot bootimage; Change-Id: I3250a3a179a7b0de9c6e401e4a94dcd23920e473 Signed-off-by: Hung-Te Lin <hungte@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/423460 Reviewed-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: https://review.coreboot.org/18008 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-12-29 13:59:37 +01:00
void regen_vbnv_crc(uint8_t *vbnv_copy);
chromeos: Add vbnv wrapper for the different backends Add a wrapper around the vbnv implementations and call into the different backend functions from there. Also move some of the common functions to the common code and simplify the backend drivers. This will allow some of the code to be re-used so the CMOS backend can backup the data into the flash backend. One side effect of this is that the cache of VBNV was removed from CMOS and EC backends and moved into the VBNV wrapper, but the flash backend also still has a separate cache because it has more state and complexity in the implementation. The wrapper cached data is not used for normal vbnv_read/vbnv_write because some callers need the ability to force a write if the backend storage is cleared (i.e. CMOS clear). BUG=chrome-os-partner:47915 BRANCH=glados TEST=build and boot on chell Change-Id: I4d2e0e99af7e8a44aec77ad9991507401babcca6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: c30f60434a64f6c0eb9ede45d48ddafff19dd24f Original-Change-Id: Ia97f6607c5ad837b9aa10b45211137221ccb93a0 Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/324120 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/13597 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-01-26 02:13:27 +01:00
int get_recovery_mode_from_vbnv(void);
void set_recovery_mode_into_vbnv(int recovery_reason);
int vboot_wants_oprom(void);
/* CMOS backend */
void read_vbnv_cmos(uint8_t *vbnv_copy);
void save_vbnv_cmos(const uint8_t *vbnv_copy);
/* Flash backend */
void read_vbnv_flash(uint8_t *vbnv_copy);
void save_vbnv_flash(const uint8_t *vbnv_copy);
/* EC backend */
void read_vbnv_ec(uint8_t *vbnv_copy);
void save_vbnv_ec(const uint8_t *vbnv_copy);
vboot: Separate vboot from chromeos 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>
2016-07-25 20:48:03 +02:00
#endif /* __VBOOT_VBNV_H__ */