[coreboot] Dualbios on GA-MA770-UD3
stepan at coresystems.de
Sat Apr 24 20:49:01 CEST 2010
On 4/24/10 8:26 PM, Patrick Georgi wrote:
> They might just use a watchdog:
> - BIOS 1 sets a flag
> - BIOS 1 configures the watchdog to trigger when it's not touched within
> 2 seconds (or whatever). watchdog would reboot the system then
> - BIOS 1 jumps in BIOS 2
> - BIOS 2 does whatever it needs to do to consider itself "safe"
> - Meanwhile, BIOS 2 touches the watchdog every so often
> - BIOS 2 deactivates the watchdog
> In this scenario, coreboot would have to know how to tell the watchdog
> to reset its countdown, and how to disable the watchdog, to safely use
> the Dual BIOS feature.
And the way to find out would be SerialICE:
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