[LinuxBIOS] flash issue with AMD Ref board

YhLu YhLu at tyan.com
Thu May 12 04:27:17 CEST 2005

what is EEPROM in your BIOS socket?
How do you install your DIMM? 4x1G in CPU0?
What is your cpu version?


From: beneo [mailto:beneo at comcast.net] 
Sent: Wednesday, May 11, 2005 6:57 PM
To: linuxbios at 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.

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