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To ensure that boot flags (legacy, usb, signed-only) are properly restored from CMOS and used in the first boot after a battery removal or RTC reset then the VbNv region needs to be preserved around the cmos_init call. When using vboot firmware selection and VbNv is stored in CMOS then that region of CMOS will have been re-initialized by the time we call cmos_init and reset CMOS if the chipset flag was set indicating a problem. BUG=chrome-os-partner:35240 BRANCH=broadwell TEST=manual testing on samus: 1) boot in dev mode, enable dev_boot_legacy and ensure it works 2) on EC console pulse PCH_RTCRST_L low for a second 3) ensure first boot after RTC reset will still boot legacy mode 4) remove battery for a time 5) ensure first boot after battery is re-inserted will still boot legacy mode Change-Id: Ica256bbdcba6d4616957ff38e63914dd15f645c6 Signed-off-by: Stefan Reinauer <reinauer@chromium.org> Original-Commit-Id: 881c7841c95dec392a66eef38a7112c1f385fdfa Original-Change-Id: I4c33f183ba4b301d68ae31c41fc6663f3be857b0 Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/241529 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/9495 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com> |
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| arch | ||
| console | ||
| cpu | ||
| device | ||
| drivers | ||
| ec | ||
| include | ||
| lib | ||
| mainboard | ||
| northbridge | ||
| soc | ||
| southbridge | ||
| superio | ||
| vendorcode | ||
| Kconfig | ||