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Re: port-atari/39965: "lock error" panic on install with Atari TT030
On Sun, Nov 30, 2008 at 09:12:13PM -0800, David Ross wrote:
> c) Same as b) but with BOOTX kernel. No networking set up.
> Result: mostly the same as b)... Different panic but consistent with the
> "lock error" panic in terms of when it occurred.
Ok, I think I've found the problem.
biodone() relies on cpu_intr_p() to determine whether to shunt to a
softint or plow straight ahead.
The atari cpu_intr_p() tests the "idepth" variable managed by
intr_dispatch() in atari/atari/intr.c. However, several of the
interrupts, including the 5380 one, are hardwired and don't go
anywhere near intr_dispatch().
One then ends up in biodone2() in an interrupt handler, which is not
supposed to happen, and everything goes downhill from there.
David A. Holland
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