Fatal trap 12 in kernel mode (amd64)

I'm tring to install FreeBSD 5.2.1-RELEASE/amd64 on my dual Opteron machine.

But it couldn't boot from miniinst-CD.( even 5.1-R, 5.2-R's )

After Memory check, I got error below.
(It flows so fast! Only I could see is last message like this)
----------------------------------------------------------------------
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 0 ()
trap number             = 12
panic: page fault
cpuid - 0;
Uptime: 1s

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x6c
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xffffffff80355331
stack pointer           = 0x10:0xffffffff807609c0
frame pointer           = 0x10:0xffffff000003df00
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 0 ()
trap number             = 12
panic: page fault
cpuid - 0;
Uptime: 1s
----------------------------------------------------------------------

Disabled ACPI( press 2 on boot menu ), I got another problem.

----------------------------------------------------------------------
Mounting root from ufs:/dev/md0
/stand/sysinstall runningas init on vty0
----------------------------------------------------------------------

After seeing this, nothing happen.(no blue installation screen.)


then..

I took off one CPU. It booted from miniinst-CD.
Installed 5.2.1/amd64 and I configured kernel as

#options	SMP

Now, I can boot FreeBSD with 2 CPU, vainly...


I just tried

options		DDB

----------------------------------------------------------------------
Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.2.1-RELEASE #1: Sat Feb 28 13:12:34 JST 2004
    satoshi_at_bianco.local:/usr/src/sys/amd64/compile/GENERIC
Preloaded elf kernel "/boot/kernel/kernel" at -0xfffffff8065f000.
ACPI APIC Table: <VIAK8  AWRDACPI>
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Opteron(tm) Processor 240 (1403.19-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0xf51  Stepping = 1
  Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
  AMD Features=0xe0500000<NX,MMX+,LM,3DNow!+,3DNow!>
real memory  = 1072627712 (1022 MB)
avail memory = 1011474432 (964 MB)
panic: AP #1 (PHY# 1) failed!
cpuid = 0;
Debugger("panic")
Stopped at      Debugger+0x4c:  xchgl   %ebx,0x22571e
db>
----------------------------------------------------------------------

Any suggestion?

It working fine FreeBSD 5.2/i386 and W2K.

----
Satoshi Sato