XBURST SIMD

Andrés Calderón andres.calderon at emqbit.com
Thu Aug 20 23:47:00 EDT 2009


On Thu, Aug 20, 2009 at 9:41 PM, Wolfgang
Spraul<wolfgang at qi-hardware.com> wrote:
> Maurus,
>
>> I think there's no way Ingenic is going to publicly release their
>> documentation regarding the MXU instruction set..
>
> Why not? Are you talking to them? :-)
> I have met with the CEO of Ingenic numerous times and we have a good
> relationship. I have also started talking about SIMD with him.
> The thing is that I don't always want to demand new things without
> delivering anything.
> So my strategy is this:
>
> First get them to be more open about the regular Linux BSP.
> They have since, upon our request, released a formerly closed driver,
> mtdblock-jz. I think it's useless and will disappear as part of our
> kernel cleanup, but nonetheless. Then they have released new 2.6.27
> patches (all of this is up on downloads.qi-hardware.com).
> I am hoping they will publicly release the Programmer's Manual for
> all their SoCs. Right now only the datasheets are open, an old version
> of the 4740 PM got leaked, see
> http://www.mediafire.com/?djnnnmnojzd

These documents are very useful! thanks


> However, Ingenic has a new version of the PM (which they also worked on
> upon our request thankfully), but we got it confidentially so I
> don't want to leak it. I hope Ingenic publishes the PM, it would be
> a good next step.
>
> Then my goal is to show them that the Linux community is real by doing
> some work on their Linux BSP. They need help, we are all not perfect.
> Ingenic does not employ the kind of kernel hacker that could get their
> source quality to where you could even try to send patches upstream.
> Luckily it seems some of the Qi activities pick up steam and Mirko Vogt
> and Lars are starting to do kernel hacking. It would be very important
> if others could join, maybe Ignacio Garcia from dingux.com when he's back
> from vacation, or others.
> Please join!
> http://github.com/lindnermarek/openwrt-x-burst/tree/x-burst
>
> If we can show a clean up-leveled (2.6.3x) kernel development to them,
> I can guarantee you they will open up more.
>
> Sure they consider SIMD to be their 'crown jewels', but it's also clear
> when other semiconductors add SIMD extensions (Intel SSE, AMD 3DNow!),
> of course they publicly and professionally document them. I cannot see
> why Ingenic would not want to do this, it's just a matter of doing all
> the work and doing it right.
> They are working on new things, SIMD2, 3D (opengl), GPS, etc.
> In all of this we (Qi Hardware) will want 'open documentation', but we
> can only really make the case if that 'open documentation' leads to
> something, namely software development. Perfectly reasonable to me.
>
> Next step is a great Linux kernel. After that I will go back to SIMD.
> Hope this makes sense, feedback welcome, and most importantly anybody
> who can join kernel hacking, please do so...
> Wolfgang
>
> P.S.: Worst case, if Ingenic remains closed for good in some areas, we
> at Qi Hardware will eventually have to look for alternatives, really open
> chips, maybe even 100% GPL'ed chips like www.opensparc.net. But right now
> Ingenic seems to be responsive, and I feel the ball is on our side to
> get some work done...

For our team it's easy to share your vision,

Best Regards,

    Andrés Calderón
    Email: andres.calderon at emqbit.com
    Web:    www.emqbit.com


>
> On Fri, Aug 21, 2009 at 01:27:18AM +0200, Maurus Cuelenaere wrote:
>> Andrés Calderón schreef:
>> > Hi,
>> >
>> > Where can I find information on the XBurst SIMD and XBurst SIMD2 instructions?
>> >
>> I think there's no way Ingenic is going to publicly release their
>> documentation regarding the MXU instruction set..
>>
>> And what's this SIMD2 instructions? I've only heard of the MXU ones..
>>
>> Regards,
>> Maurus Cuelenaere
>>
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