I've go a newbie x86 BIOS question: is there a BIOS function that
can be called to reset a PCI device? (By "reset a device" I mean
raise the #RST PCI signal line to electrical high for 1.5 seconds).
I know that BIOS does this during a soft reboot, but I was wondering
if there's a stand-alone function for doing this while the system is up
and running.
This question ame up during conversations about kexec. When kexec is
used to get out from under a crashed system, the PCI devices are
typically in some unknown state, and need to be brought to heel.
It seems to me that a brute-force reset would be a particularly
straightforward way of doing this.
--linas
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