> I'd like to mention that due to popular demand (Some commercial
> embedded projects just didn't choose Linux/MIPS because there was no
> "stable" release 2.0 available) I'm working on backporting most of
> the MIPS stuff implemented for 2.1.x back to 2.0.30+. I hope to get
> it stable this week, at least that is the deadline I'm imposing on
> myself ... That should also give you DECstation people some slowly
> moving source base to start from.
> Could you guys tell me, in which routine the kernel actually died?
> It might be that I can fix things very easily.
Well, yesterday evening I spent a few hours hacking my new 240
DECstation (39.85 "real BogoMIPS"(tm) BTW). This $§%&/§(/ Box can't
boot via tftp, so I had to choose the hard way: boot ultrix, download
new kernel, shutdown, boot new kernel via Ultrixboot, turn DECstation
off, turn DECstation on, boot ultrix ...
To make a long story short, I don't have the exact output at hand
here at work but the first debug output tells someting about:
[swapper 0] Illegal instruction at Address <somewhere>.
The instruction that causes this exception is:
>#endif /* CONF_DEBUG_TLB */
> /* Load missing pair of entries from the pgd and return. */
> mfc0 k1,CP0_CONTEXT
> lw k0,(k1) #Never causes nested exception
> mfc0 k1,CP0_EPC # get the return PC
Hope this helps