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Re: [microblaze-uclinux] RE: Linux kernel instructions->gates
Does your group have any more detailed documentation of your project?
Is the platform the PPC/FPGA from Xilinx + MB/uCL (or full/MMU Linux),
the "pure" FPGA MB/uCL, or something else? Where are you working on
this?
On Thu, 2005-08-18 at 09:42 -0700, Mike Parrish wrote:
> Hi Matt,
>
> This is exactly what our group is in the process of doing.
> Any OS service that bogs the processor can be removed from the SW build,
> replaced with a VHDL model and accessed through stub APIs that retain
> the original API calling conventions.
>
> Synchronization and pipleining are the big bugaboos to be worked out.
>
> This technique should vastly speed the processor and overall system
> performance by making large OS services concurrent and by reducing the
> CPU's executable instructions.
>
> Regards,
> Mike
>
>
> Matthew Rubenstein wrote:
>
> > That's an interesting resource. What I'm really looking for is an
> >example of factoring out an "instructions" feature of uCL, like the
> >ethernet kernel module, into a function implemented as gates in the
> >FPGA. Then removing that module from the uCL - leaving just its stub
> >that "calls" the gates.
> >
> > That *technique* could make something like MB/uCL a "migration
> >platform" for the OS, selectively optimizing parts of the OS, perhaps
> >even on an application demand basis. Start with "stock" uCL, factor a
> >driver to gates, drop the factored module from the kernel. While a
> >PPC/FPGA uCL is a good start, MB/uCL is ultimately even better, because
> >the interface between the uCL code and the FPGA can be expanded beyond
> >the bottleneck, just by adding registers etc to the MB config.
> >
> > It doesn't sound like anyone on this list has seen that technique yet.
> >I'll keep filtering the traffic until I think I see its glint
> >sometime :).
> >
> >
> >On Wed, 2005-08-17 at 07:27 -0700, David Banas wrote:
> >
> >
> >>There's a new TCP/IP stack co-processing IP core that Xilinx just released.
> >>Supposedly, it's capable of 900 Mbps throughput.
> >>
> >>David Banas
> >>Field Applications Engineer
> >>Nu Horizons Electronics Corp.
> >>2070 Ringwood Avenue
> >>San Jose, CA 95131
> >>(408)434-0800 - office
> >>(415)846-5837 - cell
> >>http://www.nuhorizons.com
> >>
> >>
> >>>-----Original Message-----
> >>>From: owner-microblaze-uclinux@itee.uq.edu.au [mailto:owner-microblaze-
> >>>uclinux@itee.uq.edu.au] On Behalf Of Matthew Rubenstein
> >>>Sent: Wednesday, August 17, 2005 6:37 AM
> >>>To: microblaze-uclinux@itee.uq.edu.au
> >>>Subject: Linux kernel instructions->gates (was: Re: [microblaze-
> >>>uclinux]Re: Welcome to microblaze-uclinux)
> >>>
> >>> Has anyone succeeded in converting any of the Linux kernel code that
> >>>runs on the PPC core into gates, then factoring that PPC code out of the
> >>>kernel (except for the stubs that interface to the gates)? Like an
> >>>ethernet, USB, keyboard or other driver? I'd like to see a model for how
> >>>to transform either uC/MB or full Linux into gates, where that can be
> >>>done.
> >>>
> >>>
> >>>On Wed, 2005-08-17 at 12:12 +1000, Alex Gibson wrote:
> >>>
> >>>
> >>>>Todd Harless wrote:
> >>>>
> >>>>
> >>>>>Hello again, I was wondering if anyone has heard oh porting uClinux to
> >>>>>the PowerPC cores yet? If anyone has please let me know. Thanks.
> >>>>>
> >>>>>Todd
> >>>>>
> >>>>>
> >>>>>
> >>>>Not on porting uclinux , but you can run full linux.
> >>>>
> >>>>Look for post on new digilentinc board on 29/4/2005 in the list
> >>>>archive
> >>>>
> >>>>A quick cut and paste of the posts below.
> >>>>
> >>>>Alex
> >>>>
> >>>>
> >>>>--------------------------------------------------------------
> >>>>Hi Aurash, hi John,
> >>>>
> >>>>We are working with the PPC on virtex2p. You do not need Monta Vista
> >>>>
> >>>>
> >>>Linux.
> >>>
> >>>
> >>>>All you need is denx eldk: http://www.denx.de/twiki/bin/view/DULG/ELDK
> >>>>And the penguin ppc linux distribution:
> >>>>
> >>>>
> >>>http://www.penguinppc.org/kernel/#developers
> >>>
> >>>
> >>>>(we are using the 2.4 Kernel)
> >>>>To get started: http://www.klingauf.de/v2p/index.phtml might be helpful.
> >>>>
> >>>>On the other hand we are also using uClinux on spartan3.
> >>>>It is really a question of what hardware you have and what you want to
> >>>>
> >>>>
> >>>do ;-)
> >>>
> >>>
> >>>>Have Fun
> >>>>Jan
> >>>>_--------------------------------------------------------------
> >>>>
> >>>>
> >>>>The PPC (ML300 board) is support in the standard kernel.org kernel
> >>>>since v2.6.10.
> >>>>
> >>>>--
> >>>>Bye, Peter Korsgaard
> >>>>---------------------------------------------------------------
> >>>>Hi Aurash,
> >>>>
> >>>>
> >>>>>Aurash wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>>Alex,
> >>>>>>>that board is more prepared for Linux rather than uC-linux (2 x
> >>>>>>>PowerPC processors)
> >>>>>>>it's a waste to use uC-Linux in my opinion when the processors can
> >>>>>>>run with 300Mhz and they have MMU
> >>>>>>>
> >>>>>>>
> >>>>>
> >>>>>Given the origins and objectives of this board - (hint XUP = Xilinx
> >>>>>University Program) I think that uClinux on this thing makes as much
> >>>>>sense, if not more, than on any other .edu oriented board. Showing
> >>>>>students a spectrum of embedded Linux, from small soft-CPU (microblaze
> >>>>>+ uClinux) to PPC + regular linux is potentially a very valuable
> >>>>>teaching exercise.
> >>>>>
> >>>>>
> >>>>>
> >>>>First off, John, Yashi and others I love the work you've been doing I've
> >>>>been lurking for a long time and I'm waiting for the proper opportunity
> >>>>to jump in. I'm an embedded sw/firmware guy.
> >>>>
> >>>>Many of those things are very valuable teaching and learning excercies.
> >>>>
> >>>>
> >>>:)
> >>>
> >>>
> >>>>>>Of course, maybe I'm just biased :) I'm also not inclined to
> >>>>>>
> >>>>>>
> >>>think it
> >>>
> >>>
> >>>>>>reasonable for educational groups to pay the licensing fees demanded
> >>>>>>by Montavista for an open-source linux kernel distro. I noticed
> >>>>>>
> >>>>>>
> >>>that
> >>>
> >>>
> >>>>>>Mind have an eval CD in the latest EDK package - let's hope they
> >>>>>>
> >>>>>>
> >>>are
> >>>
> >>>
> >>>>>>more willing to work with universities than MontaVista...
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>Properly biased :)
> >>>>
> >>>>I've been a core dev working with an open-source community that has
> >>>>built an entire embedded distro, from the ground up utilizing
> >>>>OpenEmbedded. Our build system creates 3rd-party firmware flashable
> >>>>images for the Linksys NSLU2 network attached storage device. The
> >>>>hardware is an IXP420. The wiki is at http://www.nslu2-linux.org.
> >>>>
> >>>>Another group is attempting to create OpenJTAG tool to be used for
> >>>>debugging. We've been sytmied with Xilinx Spartan 3 development board
> >>>>and our lack of FPGA experience. We need some really simple stuff, but
> >>>>lack the FPGA skills.
> >>>>
> >>>>Please let me know what you want as far as a PPC development cross-build
> >>>>environment. It propablly pretty easy for me to setup.
> >>>>
> >>>>
> >>>>
> >>>>>>OK, that's enough opinion for now :P
> >>>>>>
> >>>>>>John
> >>>>>>
> >>>>>>
> >>>>Tommy B
> >>>>------------------------------------------------------------------------
> >>>>
> >>>>
> >>>-----------------------------
> >>>
> >>>
> >>>>Or http://www.crhc.uiuc.edu/IMPACT/gsrc/hardwarelab/docs/kernel-
> >>>>
> >>>>
> >>>HOWTO.html
> >>>
> >>>
> >>>>I've already used these helpful references to get a Linux kernel running
> >>>>
> >>>>
> >>>on
> >>>
> >>>
> >>>>the PowerPC405 on the Digilent XUP-V2Pro board. I'm new to ucLinux but
> >>>>
> >>>>
> >>>it
> >>>
> >>>
> >>>>doesn't appear to be much more complicated than the ucLinux steps.
> >>>>
> >>>>Paul
> >>>>------------------------------------------------------------------------
> >>>>
> >>>>
> >>>---------------------------------
> >>>
> >>>
> >>>>X running on the ML300 w/PPC? Yes - it was quite a painful build
> >>>>process, but I got it running. Obviously MontaVista has, too.
> >>>>
> >>>>Steve
> >>>>------------------------------------------------------------------------
> >>>>
> >>>>
> >>>----------
> >>>
> >>>
> >>>>--- Alex Gibson <alxx@tpg.com.au> wrote:
> >>>>
> >>>>
> >>>>>That all looks pretty good.
> >>>>>
> >>>>>Thanks for the links.
> >>>>>Any of you , have got X running ?
> >>>>>
> >>>>>Alex
> >>>>>
> >>>>>
> >>>--
> >>>
> >>>
> >>>(C) Matthew Rubenstein
> >>>
> >>>___________________________
> >>>microblaze-uclinux mailing list
> >>>microblaze-uclinux@itee.uq.edu.au
> >>>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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> >>
> >>
> >>
> >>
>
>
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>
--
(C) Matthew Rubenstein
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