Re: [LinuxBIOS] flash issue with AMD Ref board

Wed, 11 May 2005 19:15:13 -0700

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
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:[EMAIL PROTECTED]
Sent: Wednesday, May 11, 2005 6:57 PM
To: [email protected]
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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