51e99de558
Toggle the RTC BUC control bit for Top Swap bootblock selection based on the "attempt_slot_b" flag CMOS option, allowing to select which of the BOOTBLOCK or TOP_SWAP regions to boot from. This means that after an update, the CMOS option can be set to boot from the newer TOP_SWAP bootblock. In case of failure, CMOS can be cleared to revert to the known-good base BOOTBLOCK. This is part of ongoing implementation of a redundancy feature proposed on the mailing list: https://mail.coreboot.org/archives/list/coreboot@coreboot.org/thread/C6JN2PB7K7D67EG7OIKB6BBERZU5YV35/ Switching between identical bootblocks doesn't impact further boot flow, i.e. selecting which FMAP region to load consecutive stages from. That is to be enabled in following patches. So far tested and enabled for the Alder Lake SoC. TEST=Boot VP6650, setting the attempt_slot_b flag to different values, observing that it resets/continues booting correctly. Change-Id: Ib183a1f72ee8585b2c4ad4376344de33ff54cbb9 Signed-off-by: Filip Lewiński <filip.lewinski@3mdeb.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/90042 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com> |
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| .. | ||
| alderlake | ||
| apollolake | ||
| baytrail | ||
| braswell | ||
| broadwell | ||
| cannonlake | ||
| common | ||
| denverton_ns | ||
| elkhartlake | ||
| jasperlake | ||
| meteorlake | ||
| pantherlake | ||
| skylake | ||
| snowridge | ||
| tigerlake | ||
| xeon_sp | ||
| Makefile.mk | ||