Re: [LinuxBIOS] problem about dram init

[aaron lwe]

On Dec 20, 2007 11:42 PM, Corey Osgood  wrote:
> aaron lwe wrote:
> > On Thu, Dec 20, 2007 at 04:49:32PM +0800, aaron lwe wrote:
> > > / I've configured the via cn700 dram controller
> >
> > /..
> > > / Unexpected Exception: 6 @ 10:1bfee821 - Halting
> >
> > /..
> > > / can I say ram is initialized right?
> >
> > /
> > //No. ram_check() is a useless metric.
> > //Until you can successfully run memtest86 as a payload and it reports
> > //zero errors, RAM has not yet been configured correctly.
> >
> > OK, I get it. Thanks.
> > Memtest86 reports errors at memory address
> > 1MB, 5MB, 9MB, 13MB, 17MB, ... not sure what's wrong.
>
> Weird, I've never seen that problem. Do you have any other dram modules
> you can try? Can you send me the specs (or a link to the datasheet would
> be best) on the module you're currently using? I have some comments I
> need to put in about some important bits, but haven't had the time or
> ambition lately to do it. Eventually those bits should be set up
> automatically, but I'm running up against ROMCC's limitations.
>
> -Corey

Sorry for the lack of information. The module I'm using is Kingston
KVR533D2N4/512,
the datasheet I can find is at http://
www.valueram.com/datasheets/KVR533D2N4_512.pdf
but it doesn't give too much information.
internal bank is 4, external bank(or rank) is 1. row is 14, column is 10,
primary data width is 8bits
it's single sided.
following is the dump of spd info:
00: 80 08 08 0e 0a 60 40 00 05 3d 50 00 82 08 00 00
10: 0c 04 38 00 02 00 30 3d 50 50 60 3c 1e 3c 2d 80
20: 25 38 10 23 3c 1e 1e 00 00 3c 69 80 1e 28 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 e1
40: 7f 98 00 00 00 00 00 00 01 00 00 00 00 00 00 00
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 06 10 83
60: 2d 74 0f 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 39 39 30 35 32 36 30 2d 30 30 31 2e 43 30 31 4c

I'll try another ddr2 module once I find one.
Thank you all.