panic with hme

Updated an e450 to more recent 6.0 and it panicked with this:

panic: trap: fast data access mmu miss
cpuid = 2
KDB: enter: panic
[thread pid 32 tid 100025 ]
Stopped at      kdb_enter+0x3c: ta              %xcc, 1
db> wh
Tracing pid 32 tid 100025 td 0xfffff800ff132980
panic() at panic+0x16c
trap() at trap+0x45c
-- fast data access mmu miss tar=0 %o7=0xc00c9cfc --
hme_add_rxbuf() at hme_add_rxbuf+0x16c
hme_read() at hme_read+0x190
hme_rint() at hme_rint+0x1bc
hme_intr() at hme_intr+0xcc
psycho_intr_stub() at psycho_intr_stub+0x8
ithread_loop() at ithread_loop+0x23c
fork_exit() at fork_exit+0xcc
fork_trampoline() at fork_trampoline+0x8

I'm now attempting to obtain a dump.

Kris