Re: CPUs with EVA support

[Serge Semin <fancer.lancer@gmail.com>]

Hello YunQiang,

On Mon, Dec 21, 2020 at 03:37:08PM +0800, YunQiang Su wrote:
> Serge Semin <fancer.lancer@gmail.com> 于2020年12月21日周一 下午3:05写道：
> >
> > Hello Thomas, Jiaxun
> >
> > On Mon, Dec 21, 2020 at 08:38:00AM +0800, Jiaxun Yang wrote:
> > > 在 2020/12/21 上午3:32, Thomas Bogendoerfer 写道:
> > > > Hi;
> > > >
> > > > I've started looking how to get rid of get_fs/set_fs for MIPS and
> > > > my current obstacle is EVA support.
> > > >
> > > > Looking for CPUs supporting EVA I only found P5600, are there more ?
> > >
> > > Hi Thomas,
> > >
> > > It is a optional feature for M14k but nobody enabled it :-(
> > >
> > > >
> > > > Does someone sell boards with an EVA enabled CPU ?
> > >
> > > Baikal-T1 supports EVA.
> >
> > Yeap, Baikal-T1 SoC does support EVA since based on P5600 does.
> > Moreover the feature is enabled in my CSP code by default, but
> > the segments mapping is initialized to fully match the legacy
> > MIPS address space layout.
> >
> > Regarding the boards with Baikal-T1 to purchase. It's available and
> > demonstrated on the company site:
> > https://www.baikalelectronics.com/products/339/
> >
> > Currently a single retailer selling the item is Russian-based:
> > https://www.chipdip.ru/product/bfk3.1?from=suggest_product
> > (Alas the site doesn't have an English version, so please use the
> > Goog-xlate.)
> > If for some reason you still won't be able to purchase it from there
> > please send me an email directly.
> >
> > (Today I've got a suspicious message on my corporate inbox from a guy
> > - Yunqiang Su with email domain @cipunited.com, who stated that CIP
> 

> Yes. It is me.
> CIP is holding the business of MIPS in China (including HK, Macao).
> And now I have a budget for MIPS eco-system: for team and devices.

Oh, sorry for being suspicious. Then I'll give you an answer to
the question here. First you can try to purchase the boards on the
site:
https://www.chipdip.ru/product/bfk3.1?from=suggest_product

If for some reason you won't be able to do that, please reach me one
more time and we'll try to figure out what to do then.

(I've added my managers in CC so they would be aware of the issue.)

-Sergey

> 
> > United wants to purchase one or more of them for you and requested to
> > give them the company sells contacts. I didn't response, because the
> > message structure looked more like a spam, than an official request.
> > It was also strange not to see you in CC.)
> >
> > Regarding the Baikal-T1 boards being finally supported in the kernel.
> > I am still working on it. There are several more SoC-device drivers
> > to fix and I'll be ready to submit the CSP/BSP code to the MIPS arch
> > subsystem.
> >
> > -Sergey
> >
> > >
> > > >
> > > > How good is EVA support in qemu ?
> > >
> > > EVA is functional in QEMU.
> > > I had tested it with P5600 malta system.
> > >
> > > - Jiaxun
> > >
> > > >
> > > > Thomas.
> > > >
> > >
> 
> 
> 
> -- 
> YunQiang Su