kernel panic on IP32 R12000

[Luc Pernot <lpernot%magma.ca@localhost>]

> hinv
                  System: IP32
               Processor: 300 Mhz R12000, with FPU
    Primary I-cache size: 32 Kbytes
    Primary D-cache size: 32 Kbytes
    Secondary cache size: 1024 Kbytes
             Memory size: 256 Mbytes
                Graphics: CRM, Rev C
                   Audio: A3 version 1
               SCSI Disk: scsi(0)disk(2)
              SCSI CDROM: scsi(0)cdrom(4)
> printenv
AutoLoad=Yes
console=g
diskless=0
dbaud=9600
volume=80
sgilogo=y
monitor=h
TimeZone=PST8PDT
netaddr=192.168.0.120
crt_option=1
SystemPartition=pci(0)scsi(0)disk(2)rdisk(0)partition(8)
OSLoadPartition=pci(0)scsi(0)disk(2)rdisk(0)partition(0)
OSLoader=boot
OSLoadFilename=netbsd
keybd=US
cpufreq=300
eaddr=08:00:69:0e:85:21
NoAutoLoad=CONSOLE OPEN FAILED.
ConsoleOut=serial(0)
ConsoleIn=serial(0)
videostatus=illegal_env_var

here how it's boot: on the internal scsi disk
> boot
50624+1376 entry: 0x80002000

NetBSD/sgimips 4.99.49 Bootstrap, Revision 1.2
(builds@wb30, Mon Jan 21 21:48:00 PST 2008)

devopen: pci(0)scsi(0)disk(2)rdisk(0)partition(0) type scsi file netbsd
3479680+198212 [208432+200818]=0x3e624c
[ Kernel symbol table missing! ]
panic: can't handle primary cache on impl 0xe

Exception: <vector=Normal>
Status register: 0x20000002<CU1,IPL=8,MODE=KERNEL>
Cause register: 0x8024<CE=0,IP8,EXC=BREAK>
Exception PC: 0x882e1420, Exception RA: 0x8824fad8
Breakpoint exception at address 0x938
 Saved user regs in hex (&gpda 0x810612c8, &_regs 0x810614c8):
 arg: 81070000 428 0 1
 tmp: 81070000 100 883e0000 883a0000 1400 883e0000 10000 0
 sve: 81070000 4113d68b 0 46093c3f 0 411254be 0 3f69bc7c
 t8 81070000 t9 0 at 0 v0 410d527f v1 0 k1 1
 gp 81070000 fp 0 sp 0 ra 0

PANIC: Unexpected exception

[Press reset or ENTER to restart.]