Date: Wed, 14 Mar 2018 16:35:33 +0900 (JST) From: Mori Hiroki <yamori813@yahoo.co.jp> To: Michael Zhilin <mizhka@gmail.com>, Vishal Gupta <vishalgupta7972@gmail.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>, "freebsd-embedded@freebsd.org" <freebsd-embedded@freebsd.org>, "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org> Subject: Re: GSOC 2018 ARM Cortex Processor Message-ID: <661126.97758.qm@web101706.mail.ssk.yahoo.co.jp> In-Reply-To: <CAF19XBLCu9hC3_anw=WVOxN1KngeKXp%2B_wC914i9TrnAOyd=WA@mail.gmail.com> References: <CAKJMsQruOFPFOEbxEJnWajrnBucT_WHGiT9wQAy4v19PMcVxWQ@mail.gmail.com> <CAF19XBJeioko7S9AEr5=L%2B83FEowhPQyPKANd2TMHJAqSK_W0Q@mail.gmail.com> <CANCZdfqUwoNO33PwftJJZ=f907jiCKDtY8Di7HFcD4Lqxi44_Q@mail.gmail.com> <CAKJMsQq4d-guaxr4-m6Md8OPQjSWJGBo6z2iPDiFu2ghmTZPgg@mail.gmail.com> <CAF19XBLCu9hC3_anw=WVOxN1KngeKXp%2B_wC914i9TrnAOyd=WA@mail.gmail.com>
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Hi Realtek is very strange company. RTL8197D -- Lexra base RTL8197F -- MIPS 24K base I think we must not support Lexra type soc. Because of that instruction is very old. But Realtek make new MIPS 24K base soc. That support is good. Regards Hiroki Mori ----- Original Message ----- > From: Michael Zhilin <mizhka@gmail.com> > To: Vishal Gupta <vishalgupta7972@gmail.com> > Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>; "freebsd-embedded@freebsd.org" <freebsd-embedded@freebsd.org>; freebsd-mips@freebsd.org > Date: 2018/3/14, Wed 15:39 > Subject: Re: GSOC 2018 ARM Cortex Processor > > Added freebsd-mips@ > > Regarding MIPS, I would like to see support for retail Realtek MIPS chips > for instance (RTL8196, RTL8197). There are new brand router models: > https://wikidevi.com/wiki/Tenda_AC6_V2 or > https://wikidevi.com/wiki/Realtek#bgn_2 > > Thanks! > > On Tue, Mar 13, 2018 at 4:49 PM, Vishal Gupta <vishalgupta7972@gmail.com> > wrote: > >> Thank you for the reply. >> Which new processor would you suggest between PowerPC, ARM, and MIPS >> which i can port during the summer period and will also be useful for the >> community. >> >> Vishal Gupta >> >> On Tue, Mar 13, 2018 at 11:52 AM, Warner Losh <imp@bsdimp.com> wrote: >> >>> There's not currently any other FreeBSD port that works on a system >>> without a MMU. The buffer cache assumes that we can fault in pages as >>> needed based on virtual address access. The TEXT sharing between > programs >>> assumes we can map the same page into multiple processes. The shared >>> libraries we have assume something similar, and in some cases copy on > write >>> on top of that (though that's no different from a HW perspective > than these >>> first few cases). >>> >>> So, if you're willing to live without these features, or find some > other >>> way to accomplish the same sorts of things, a cortex M/R port would be >>> tricky. Also, FreeBSD's kernel size may present some obstacles. > We're >>> optimized for a rich memory environment, so we trade extra copies of > code >>> to speed up execution of code, which matches the x86 market, as well as > the >>> high-end of embedded quite well. >>> >>> If you are looking for a BSD to port to these processors, you might >>> consider looking at what www.retrobsd.org has done with their 2.11BSD >>> port to the MIPS processor in the PIC32 core with the MIPS M4K >>> architecture. It runs in as little as 128k of RAM, while FreeBSD these > days >>> needs at least 128MB of RAM without careful tuning... >>> >>> Warner >>> >>> On Tue, Mar 13, 2018 at 12:07 AM, Michael Zhilin > <mizhka@gmail.com> >>> wrote: >>> >>>> Hi, >>>> >>>> Disclaimer: I'm neither ARM expect nor GSoC person. >>>> >>>> I may be wrong, but FreeBSD (or Linux, doesn't matter) requires > MMU which >>>> is my tossing in Cortex M/R family of ARM processors. So it's > technically >>>> difficult/impossible to port it on non-MMU processor. >>>> >>>> Added freebsd-arm@ for wide audience. >>>> >>>> Thank you! >>>> >>>> >>>> >>>> On Tue, Mar 13, 2018 at 1:12 PM, Vishal Gupta > <vishalgupta7972@gmail.com >>>> > >>>> wrote: >>>> >>>> > Hi, >>>> > I am interested in working on the project to port FreeBSD to > ARM >>>> Cortex M >>>> > or R series microprocessor. Some queries related to the > project are :- >>>> > 1) What are the expected deliverable for the project. >>>> > 2) Where to put my draft proposal for review so that it can be >>>> improved. >>>> > >>>> > An early reply is awaited. >>>> > >>>> > Thanks and regards, >>>> > Vishal Gupta >>>> > _______________________________________________ >>>> > freebsd-embedded@freebsd.org mailing list >>>> > https://lists.freebsd.org/mailman/listinfo/freebsd-embedded >>>> > To unsubscribe, send any mail to > "freebsd-embedded-unsubscribe@ >>>> freebsd.org >>>> > " >>>> > >>>> _______________________________________________ >>>> freebsd-embedded@freebsd.org mailing list >>>> https://lists.freebsd.org/mailman/listinfo/freebsd-embedded >>>> To unsubscribe, send any mail to > "freebsd-embedded-unsubscribe@ >>>> freebsd.org" >>>> >>> >>> >> > _______________________________________________ > freebsd-arm@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" >help
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