This change introduces a new Kconfig option `VBOOT_EC_SYNC_ESOL`.
This config can be used to enable the display of early sign-of-life
(eSOL) during EC software sync whenever supported. When this config
is enabled, the EC sync must be performed later from the SoC code
(mainboard_romstage_entry() function) in order to display the eSOL
screen.
This change also adds a hook function vboot_show_ec_sync_esol()
to be run before performing the EC firmware image update during the EC
sync when `VBOOT_EARLY_EC_SYNC` is enabled. This function needs to be
implemented in SoC code when `VBOOT_EC_SYNC_ESOL` is enabled to display
the eSOL and notify the users about the firmware update.
AP log during EC firmware update in romstage:
```
[DEBUG] Google Chrome EC: version:
[DEBUG] ro: pujjo-15217.861.0
[DEBUG] rw: pujjo-15217.861.0
[DEBUG] running image: 1
[DEBUG] FMAP: area FW_MAIN_A found @ 3a2000 (2312128 bytes)
[INFO ] MMAP window: SPI flash base=0x3a0000, Host base=0xff3a0000, Size=0xc60000
[INFO ] CBFS: Found 'ecrw.hash' @0x7f8c0 size 0x20 in mcache @0xfef97708
[INFO ] VB2:vb2_digest_init() 32 bytes, hash algo 2, HW acceleration enabled
[INFO ] VB2:check_ec_hash() Hexp RW(active): 62d1d55d26f33bd01a3676656148bedacf44189c81b195ec5488499074fe9bb0
[INFO ] VB2:check_ec_hash() Hmir: 62d1d55d26f33bd01a3676656148bedacf44189c81b195ec5488499074fe9bb0
[INFO ] EC took 1124us to calculate image hash
[INFO ] VB2:check_ec_hash() Heff RW(active): 8d111297eb53ba2289d256a769409bcbba4cf5b488fea97e40edcc9342a0f77f
[INFO ] VB2:check_ec_hash() Heff != Hexp. Schedule update
[INFO ] VB2:sync_ec() select_rw=RW(active)
[INFO ] VB2:update_ec() Updating RW(active)...
[INFO ] CBFS: Found 'ecrw' @0x1a9f80 size 0x40000 in mcache @0xfef97a9c
[INFO ] VB2:vb2_digest_init() 262144 bytes, hash algo 2, HW acceleration enabled
[INFO ] CBFS: Found 'ecrw.hash' @0x7f8c0 size 0x20 in mcache @0xfef97708
[INFO ] VB2:vb2_digest_init() 32 bytes, hash algo 2, HW acceleration enabled
[INFO ] VB2:check_ec_hash() Hexp RW(active): 62d1d55d26f33bd01a3676656148bedacf44189c81b195ec5488499074fe9bb0
[INFO ] VB2:check_ec_hash() Hmir: 62d1d55d26f33bd01a3676656148bedacf44189c81b195ec5488499074fe9bb0
[WARN ] ec_hash_image: No valid hash (status=0 size=0). Computing...
[INFO ] EC took 482169us to calculate image hash
[INFO ] VB2:check_ec_hash() Heff RW(active): 62d1d55d26f33bd01a3676656148bedacf44189c81b195ec5488499074fe9bb0
[INFO ] VB2:update_ec() Updated RW(active) successfully
[INFO ] VB2:sync_ec() Rebooting to jump to new EC-RW
[INFO ] VB2:vb2api_ec_sync() ec_sync_phase2(ctx) returned 0x1004
[INFO ] EC Reboot requested. Doing cold reboot
```
BUG=b:412210635
TEST=Able to perform successful EC sync when `VBOOT_EARLY_EC_SYNC` is
selected.
Change-Id: Id853c73b54942ab35d4e3f019c1eddf4449c8d3c
Signed-off-by: Pranava Y N <pranavayn@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87668
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
ac4503d0dd