RE: [microblaze-uclinux] Spartan 3E500 kits, REV C and REV D

[John Yin <email4jy@xxxxxxxxx>]

Leonid,

The problem I've had with working on both RevC and
RevD 500E boards is that the DDR SDRAM address for
RevC boards are mapped to an address (0x22000000) that
cannot be supported on the RevD boards.

The reason is that the address 0x22000000 falls on a
32Mbyte boundary.  This is fine for RevC boards that
has 16Mx16 DDR SDRAM (32Mbyte) chips.  However, on
RevD boards, the DDR SDRAM is 32Mx16 (64Mbytes).  This
means that the memory address for RevD boards must be
0x24000000 (or some other multiple of 64Mbyte).

john

--- Leonid <Leonid@xxxxxxxxx> wrote:

> If something wrong with SDRAM, you shall be able
> easily catch that in
> debugger. I had similar problem with Petalinux
> reference design for
> Spartan 3, rev C. Bits 5 and 21 of DDR controller
> didn't work and
> resulting image wasn't useful. I resolved the
> problem, switching to
> older version of memory controller.
> 
> Leonid.
> 
> -----Original Message-----
> From: owner-microblaze-uclinux@xxxxxxxxxxxxxx
> [mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] On
> Behalf Of e.stiebler
> Sent: Wednesday, June 20, 2007 6:48 AM
> To: microblaze-uclinux@xxxxxxxxxxxxxx
> Subject: Re: [microblaze-uclinux] Spartan 3E500
> kits, REV C and REV D
> 
> Jens Ravn Alsig wrote:
> > Hi,
> > 
> > What do you mean be "boot anything"?
> 
> I can boot the "first stage loader" which comes via
> JTAG.
> If I download U-Boot or linux kernel, the loader
> says the the download 
> was OK, but nothing else happens.
> I think, the u-boot prints as first message that the
> SDRAM is OK, that's
> why I'm thinking that soemthing is wrong with the
> SDRAM ...
> 
> > I also have a rev d kit and had some problems with
> downloading via
> jtag.
> 
> Did you change anything ?
> Are you using any of the "prebuilt" downloads from
> the last petalogix 
> distribution ?
>   The
> > download seemed ok but when I tried to execute the
> program failed. 
> 
> "somehow" the same behavior ;-0
> 
> > I fixed the problem by justing the configuration
> jumpers. 
> > They should be (M2:M1:M0) = 0:1:0
> 
> My JTAG is OK ...
> 
> Cheers
> > 
> > /Jens
> > 
> > 
> > 
> > On Tue Jun 19 23:30 , 'e.stiebler'
> <emu@xxxxxxxxxx> sent:
> > 
> >> Hi all,
> >> as it seems I'm the first one who has one of the
> REV D kits here ...
> >>
> >> The REV D has 64 MBytes of SDRAM instead of the
> 32 MBytes on the REV
> C.
> >>
> >> Hopefully that the reason, I can't boot anything
> but the first stage
> on 
> >> my board. I already found some occurrences of the
> SDRAM 16Mx16 IP,
> and 
> >> changed it to SDRAM_32Mx16 already, but it seems
> I didn't catch all
> of 
> >> them. BTW, it seems that it is the same DDR SDRAM
> as on the 
> >> Spartan3e1600 board.
> >>
> >> Cheers
> >> ___________________________
> >> microblaze-uclinux mailing list
> >> microblaze-uclinux@xxxxxxxxxxxxxx
> >> Project Home Page :
> http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
> >> Mailing List Archive :
>
http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
> >>
> >> )
> > 
> > 
> > 
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>
http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
> > 
> > 
> > 
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> 



       
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