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=0A=0ARealtek is very strange company.=0A=0ARTL8197D -- Lexra base=0ARTL8= 197F -- MIPS 24K base=0A=0AI think we must not support Lexra type soc.=0ABe= cause of that instruction is very old.=0A=0ABut Realtek make new MIPS 24K b= ase soc.=0AThat support is good.=0A=0ARegards=0A=0AHiroki Mori=0A=0A=0A----= - Original Message -----=0A> From: Michael Zhilin <mizhka@gmail.com>=0A> To= : Vishal Gupta <vishalgupta7972@gmail.com>=0A> Cc: "freebsd-arm@freebsd.org= " <freebsd-arm@freebsd.org>; "freebsd-embedded@freebsd.org" <freebsd-embedd= ed@freebsd.org>; freebsd-mips@freebsd.org=0A> Date: 2018/3/14, Wed 15:39=0A= > Subject: Re: GSOC 2018 ARM Cortex Processor=0A> =0A> Added freebsd-mips@= =0A> =0A> Regarding MIPS, I would like to see support for retail Realtek MI= PS chips=0A> for instance (RTL8196, RTL8197). There are new brand router mo= dels:=0A> https://wikidevi.com/wiki/Tenda_AC6_V2 or=0A> https://wikidevi.co= m/wiki/Realtek#bgn_2=0A> =0A> Thanks!=0A> =0A> On Tue, Mar 13, 2018 at 4:49= PM, Vishal Gupta <vishalgupta7972@gmail.com>=0A> wrote:=0A> =0A>> Thank y= ou for the reply.=0A>> Which new processor would you suggest between Power= PC, ARM, and MIPS=0A>> which i can port during the summer period and will = also be useful for the=0A>> community.=0A>> =0A>> Vishal Gupta=0A>> =0A>>= On Tue, Mar 13, 2018 at 11:52 AM, Warner Losh <imp@bsdimp.com> wrote:=0A>= > =0A>>> There's not currently any other FreeBSD port that works on a syst= em=0A>>> without a MMU. The buffer cache assumes that we can fault in page= s as=0A>>> needed based on virtual address access. The TEXT sharing betwee= n =0A> programs=0A>>> assumes we can map the same page into multiple proce= sses. The shared=0A>>> libraries we have assume something similar, and in = some cases copy on =0A> write=0A>>> on top of that (though that's no diffe= rent from a HW perspective =0A> than these=0A>>> first few cases).=0A>>> = =0A>>> So, if you're willing to live without these features, or find some = =0A> other=0A>>> way to accomplish the same sorts of things, a cortex M/R = port would be=0A>>> tricky. Also, FreeBSD's kernel size may present some o= bstacles. =0A> We're=0A>>> optimized for a rich memory environment, so we = trade extra copies of =0A> code=0A>>> to speed up execution of code, which= matches the x86 market, as well as =0A> the=0A>>> high-end of embedded qu= ite well.=0A>>> =0A>>> If you are looking for a BSD to port to these proce= ssors, you might=0A>>> consider looking at what www.retrobsd.org has done = with their 2.11BSD=0A>>> port to the MIPS processor in the PIC32 core with= the MIPS M4K=0A>>> architecture. It runs in as little as 128k of RAM, whi= le FreeBSD these =0A> days=0A>>> needs at least 128MB of RAM without caref= ul tuning...=0A>>> =0A>>> Warner=0A>>> =0A>>> On Tue, Mar 13, 2018 at 12:= 07 AM, Michael Zhilin =0A> <mizhka@gmail.com>=0A>>> wrote:=0A>>> =0A>>>> = Hi,=0A>>>> =0A>>>> Disclaimer: I'm neither ARM expect nor GSoC person.=0A>= >>> =0A>>>> I may be wrong, but FreeBSD (or Linux, doesn't matter) require= s =0A> MMU which=0A>>>> is my tossing in Cortex M/R family of ARM processo= rs. So it's =0A> technically=0A>>>> difficult/impossible to port it on non= -MMU processor.=0A>>>> =0A>>>> Added freebsd-arm@ for wide audience.=0A>>>= > =0A>>>> Thank you!=0A>>>> =0A>>>> =0A>>>> =0A>>>> On Tue, Mar 13, 2018 = at 1:12 PM, Vishal Gupta =0A> <vishalgupta7972@gmail.com=0A>>>> >=0A>>>> = wrote:=0A>>>> =0A>>>> > Hi,=0A>>>> > I am interested in working on the pr= oject to port FreeBSD to =0A> ARM=0A>>>> Cortex M=0A>>>> > or R series mi= croprocessor. Some queries related to the =0A> project are :-=0A>>>> > 1) = What are the expected deliverable for the project.=0A>>>> > 2) Where to pu= t my draft proposal for review so that it can be=0A>>>> improved.=0A>>>> = >=0A>>>> > An early reply is awaited.=0A>>>> >=0A>>>> > Thanks and regar= ds,=0A>>>> > Vishal Gupta=0A>>>> > ______________________________________= _________=0A>>>> > freebsd-embedded@freebsd.org mailing list=0A>>>> > htt= ps://lists.freebsd.org/mailman/listinfo/freebsd-embedded=0A>>>> > To unsub= scribe, send any mail to =0A> "freebsd-embedded-unsubscribe@=0A>>>> freebs= d.org=0A>>>> > "=0A>>>> >=0A>>>> _______________________________________= ________=0A>>>> freebsd-embedded@freebsd.org mailing list=0A>>>> https://= lists.freebsd.org/mailman/listinfo/freebsd-embedded=0A>>>> To unsubscribe,= send any mail to =0A> "freebsd-embedded-unsubscribe@=0A>>>> freebsd.org"= =0A>>>> =0A>>> =0A>>> =0A>> =0A> __________________________________________= _____=0A> freebsd-arm@freebsd.org mailing list=0A> https://lists.freebsd.or= g/mailman/listinfo/freebsd-arm=0A> To unsubscribe, send any mail to "freebs= d-arm-unsubscribe@freebsd.org"=0A>
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