EEPROM is SST 48LF004.

I install 2GB to CPU0 and 2GB to CPU1. I use 512MB DIMM, 4 DIMM per CPU, so total should be 4GB. But linux command cat /proc/meminfo report one 2 GB when using LinuxBIOS.

I have two opteron CPU, I'm not sure the version though.

thanks

beneo

----- Original Message -----

From: YhLu

To: beneo ; linuxbios@openbios.org

Sent: Wednesday, May 11, 2005 7:27 PM

Subject: RE: [LinuxBIOS] flash issue with AMD Ref board

what is EEPROM in your BIOS socket?

How do you install your DIMM? 4x1G in CPU0?

What is your cpu version?

YH

From: beneo [mailto:beneo@comcast.net]
Sent: Wednesday, May 11, 2005 6:57 PM
To: linuxbios@openbios.org
Subject: [LinuxBIOS] flash issue with AMD Ref board

I'm playing with the AMD seranede board. The flash_and_burn utility can not program linuxBIOS to the flash. but I can read the linuxbios and save to a file correctly.

If I boot from AMI BIOS, using same utility, I can program a linuxBIOS into the flash. That made me believe some setting by linuxBIOS on the AMD Ref board is not right. I just don't know what.

I used gdb to trace the code, Flash_and_burn utility enables flash by program two AMD Southbridge 8111 registers, One for enable 4MB window to flash (DevB, 0x43), one for enable write to the flash (DevB, 0x40). I checked the AMD datasheet, it seems all it need. But if I boot with LinuxBIOS, the flash erase command has no effect. with AMI BIOS, I can sucessfully erase a sector.

could anybody give me some pointer on what to check?

I should add, the linuxBIOS only reports 2GB memory when I really have 4GB in the system. I don't know if this have something to do with my issue.

Thanks

Beneo

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