Re: [partial-reconfig] Reg uclinux/microblaze and partial reconf.

["Lakshmi Narasimhan. S" <sulakshm@xxxxxxxxxxxxxxxxxxxx>]

Hello Team,

I gave up building a uclinux image for a microblaze until I hear
from you otherwise that I can build one with EDK 6.3 version.

For the time being, I was thinking of building a PPC version and
run linux on it. I cut down a lot of things and now my design
is very lean.
I have the following components 1 PPC, PLB DDR SDRAM (256MB external),
OPBHWICAP, OPB INTC, OPB UARTLITE, OPB SPI EEPROM and some BRAM.
Now with the above design my hardware is ready. But now I am wondering
how to program the device?

Since JTAG is not available, XMD wont work and neither would SYSACE
work. What other programming options do I have? Putting JTAG would
mean I would need to put the second processor too! Which I do not want
to!!!

I have a COMPACT FLASH on board, but one needs to provide
some bootup ROM code, before I could use FLASH. For that purpose
I put in SPI EEPROM, but I dont know how to program this either.
I suspect the EEPROM needs to be external to board and make my EEPROM
talk to the correct pins on the board using the UCF file and route
is accordingly. Is that so?

For accessing the flash do I need to use OPB EMC? Or is it possible
even otherwise?

Please advise. Where can I find more details on this setup?

Thanks
LN



On Sun, 14 Aug 2005, Lakshmi Narasimhan. S wrote:

> Hello John!
> Thanks for your reply.
> I have read your paper long back while digging for inputs on
> reconfiguration. It really is an interesting read.
>
> I have some experience with linux in general and I could visualize
> how things could be done. I would have written a char device driver
> and internally parse the inputs and call the ICAP APIs accordingly.
> I think it shouldnt be difficult.
>
> But currently I am way behind this. I have EDK 6.3 and I do not
> have an option to build uclinux under software settings for
> microblaze. So, is there anyway that one could build a uclinux
> for microblaze with EDK 6.3 version?
>
> Thanks
> LN
>
>
>
>
> On Sun, 14 Aug 2005, John Williams wrote:
>
> > Hi Lakshmi,
> >
> > Lakshmi Narasimhan. S wrote:
> > > Else the second choice would be to go for microblaze running uclinux.
> > > Now I havent run uclinux successfully yet and am just starting.
> > > Has anyone got a reference design with ml310 board running uclinux?
> > > I wasnt able to find anything with the microblaze-uclinux webpage
> > > for this board.
> >
> > It'
> > s easy to make your own system for running MicroBlaze uClinux - as long
> > as there are EDK BSB board descrption files for the ML310 (I'm pretty
> > sure there are).
> >
> > Follow these instructions - aimed at ML401 but same concept.
> >
> > http://www.itee.uq.edu.au/~wu/downloads/uClinux_ready_Microblaze_design.pdf
> >
> > > Thirdly, has anyone in this group had any success with reconfiguration
> > > under the control of a microprocessor? Because I am worried
> > > a bit as to whether there would be sufficient space after routing left
> > > for the reconfiguration to happen. Any remarks on this regard?
> > > For this  I was planning to use OPB-HWICAP provided by xilinx.
> >
> > Yes, it can be done - I did some simple experiments in this last year,
> > but never took it much further.  You can read about it here:
> >
> > http://eprint.uq.edu.au/archive/00001296/
> >
> > Full text PDF is available.  I am also happy to release the uClinux ICAP
> > device driver if you want it.
> >
> > Regards,
> >
> > John
> >
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