bad mp table would be my guess.
I think the I/O APICs are incorrectly assigned to buses. From the kernel messages, devices on bus 0 are transformed to high IRQs.
Can anyone one confirm that the mptable.c under src/tyan/s2735 is a good one to boot SMP linux kernel? I might need to manually construct the MP table for my board according to a good one.
Thanks, gin