Re: [microblaze-uclinux] DDR + XUP problem

[Jonathan Jung <jwjung@xxxxxxxxxxxxx>]

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Hi Leo,

I have the same board and use the same version of the software.  Make  
sure that you are using the newest board libraries from Xilinx and  
that you have one of the DDR modules listed on the compatibility list.

Try using the built in self test (pre-programed on the board rom) to  
test the memory.  I could not get it to pass unless I used a  
qualified module from kingston.

Jonathan

On Feb 8, 2006, at 10:50 PM, leo han wrote:

> I am using the XUP board (virtexIIpro) with EDK 7.1. Actually, I  
> can not pass the memory_test generated by the BSB.  I heard that  
> there is a bug in the opb_ddr. But I am not sure whether this is  
> related.
> Thanks.
>
>
>
>
> > From: "Steve Spano" <steve@xxxxxxxxxxxxx>
> > Reply-To: microblaze-uclinux@xxxxxxxxxxxxxx
> > To: <microblaze-uclinux@xxxxxxxxxxxxxx>
> > Subject: RE: [microblaze-uclinux] DDR + XUP problem
> > Date: Wed, 8 Feb 2006 22:13:53 -0500
> >
> > Wen,
> >
> > What board are you using?
> >
> > Are you sure you can pass the low-level read/write pattern test  
> > (should
> > be automatically generated by EDK) on the DDR?
> >
> > Sounds like timing is not quite right on DDR bus. The linux kernel my
> > firm is using is now around 4MEG and runs from DDR (only when the  
> > timing
> > is right)
> >
> >
> >
> > Steve Spano
> > President, Finger Lakes Engineering
> > (V) 607-277-1614 x223
> > (F) 800-835-7164
> > (C) 607-342-1150
> > steve@xxxxxxxxxxxxx
> > www.fl-eng.com
> >
> > -----Original Message-----
> > From: owner-microblaze-uclinux@xxxxxxxxxxxxxx
> > [mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] On Behalf Of leo han
> > Sent: Wednesday, February 08, 2006 8:12 PM
> > To: microblaze-uclinux@xxxxxxxxxxxxxx
> > Subject: [microblaze-uclinux] DDR + XUP problem
> >
> > I have a big C program (800KB) which must use DDR memory. I tried  
> > to use
> > a
> > 256M ddr memory  with PPC and map all the sections to the DDR memory
> > space
> > except the boot and boot0.  However, the program can not start  
> > from DDR.
> > The
> > problem occurs for microblaze also.
> > It almost kills me:(
> > Could anyone have any solution? Thanks.
> >
> > _________________________________________________________________
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> >
> >
> >
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