patm / NATM system freeze with CPUTYPE?=opteron

[Clemens Zauner]

(For details, please see the posting in comp.unix.bsd.freebsd.misc
 Message-ID: <f29tq0$2g09$1 at geiz-ist-geil.priv.at> )

Im facing complete system freezes when compiling the kernel with
CPUTYPE?=opteron immediately *after* issuing an ifconfig on 
the patm0 - interface (trying to set an IP address).

System is 6.2-p4; i386; kernconf nearly untampered (stuff like scsi,
raid an the like => out, and the atm-stuff (NATM) <= in).

Card is an ProSUM ProATM 155; idt77252 Rev. F; Suni/Lite (PMC-5346) PHY

I guess the most of the gory details in my posting ar not of any 
interest - but one thing shows up in dmesg:

patm0: <NICStAR (77222/77252) ATM adapter> port 0xe800-0xe8ff mem 0xfcfff000-
0xfcffffff,0xfac00000-0xfaffffff irq 16 at device 8.0 on pci2
patm0: carrier detected
patm0: ProATM 155 interface; idt77252 Rev. F; Suni/Lite (PMC-5346) PHY
patm0: 512K x 32 SRAM; 16384 connections
bus_dmamem_alloc failed to align memory properly.
patm0: [GIANT-LOCKED]

The "bus_dmamem_alloc" is somehow irritating me ...

cu
	Clemens.