amd64 does not see all 4 GB RAM on tyan GT24

Norberto Meijome freebsd at
Mon Nov 7 12:23:26 PST 2005

Claus Guttesen wrote:
>>>Just received a Tyan GT24 with a S2891 board. In the
>>>bios-setup-utility the board has 4 GB RAM, but when FreeBSD 6.0
>>>release boot it only recognizes 3 GB. Dmesg:
>>Please send the verbose boot output, specifically the lines that
>>mention 'SMAP'.
> Did a verbose boot but no lines mentioning SMAP. Verbose dmes is attached.

Hi there, same board/server (different opteron), 4 GB, only 3 GB too 
(havent got access to BIOS atm to check what it sees, but pretty sure it 
was more than 3 GB). Running first version of BIOS code, will be 
updating it soon and will let u know if that makes any difference.

normal dmesg:

Copyright (c) 1992-2005 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 6.0-STABLE #0: Mon Nov  7 23:25:15 EST 2005
     root at cerberus.xxxxxxxxxxx:/usr/obj/usr/src/sys/CERBERUS
module_register: module g_mirror already exists!
Module g_mirror failed to register: 17
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Opteron(tm) Processor 250 (2411.12-MHz K8-class CPU)
   Origin = "AuthenticAMD"  Id = 0xf5a  Stepping = 10
   AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow+,3DNow>
real memory  = 3488743424 (3327 MB)
avail memory = 3366961152 (3210 MB)
ACPI APIC Table: <PTLTD          APIC  >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
  cpu0 (BSP): APIC ID:  0
  cpu1 (AP): APIC ID:  1
ioapic0 <Version 1.1> irqs 0-23 on motherboard
ioapic1 <Version 1.1> irqs 24-27 on motherboard
ioapic2 <Version 1.1> irqs 28-31 on motherboard
acpi0: <PTLTD   RSDT> on motherboard
acpi0: Power Button (fixed)

hw.physmem: 3480248320
hw.usermem: 3373248512
hw.realmem: 3488743424


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