Also, I just tried setting mips_L2CachePresent = 0 as a test without L2 cache
enabled, and I ended up with...

root device (default fd0a): sn0
dump device: 
file system (default nfs): 
root on sn0
nfs_boot: trying RARP (and RPC/bootparam)
sonic: no heartbeat
panic: TLB out of universe: ksp 0xc2063f78 epc 0x8022bbc8 vaddr 0xd3f5f000
Stopped at      0x802da5c0:     jr      ra
                bdslot: nop
db> t
802da5bc+4 (be00,16de58,d,0) ra 8022bc5c sz 0
8022bbb8+a4 (802ff874,16de5b,30,0) ra 80293f40 sz 48
80293b5c+3e4 (802ff874,16de5b,30,0) ra 0 sz 48
User-level: curproc NULL
db> ps
 PID             PPID       PGRP        UID S   FLAGS          COMMAND    WAIT
 1                  0          0          0 3     0x4             init initexe
 0                 -1          0          0 3 0x20204          swapper  nfsbif
db> 

Anyone have any clues???

-Mark