Re: RE: [microblaze-uclinux] DDR + XUP problem

[<elynum@xxxxxxx>]

Check out xilinx's app note xapp806 and do exactly what they say and also check out this solution record which says you have to issue a reset in xmd.

http://www.xilinx.com/xlnx/xil_ans_display.jsp?iLanguageID=1&iCountryID=1&getPagePath=19668
> 
> From: "leo han" <wenwenti@xxxxxxxxxxx>
> Date: 2006/02/09 Thu AM 01:50:53 EST
> To: microblaze-uclinux@xxxxxxxxxxxxxx
> Subject: RE: [microblaze-uclinux] DDR + XUP problem
> 
> 
> 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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