From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 References: <16b84db8d961285c9000bca1d2d20f04@hamnavoe.com> In-Reply-To: From: =?UTF-8?B?0J7Qu9C10LMg0JHQsNGF0LDRgNC10LI=?= Date: Sat, 17 Aug 2019 08:57:28 +0300 Message-ID: To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: multipart/alternative; boundary="000000000000de9289059049c873" Subject: Re: [9fans] RISC-V (was: Plan9 on radpberry pi zero ?) Topicbox-Message-UUID: 053d420c-eada-11e9-9d60-3106f5b1d025 --000000000000de9289059049c873 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable By the way, I meant kendryte k210. and the board, for example, maix bit, is very cheap (you can get a stock from Bangood.com) =D1=81=D0=B1, 17 =D0=B0=D0=B2=D0=B3. 2019 =D0=B3., 1:56 minux : > On Fri, Aug 16, 2019 at 9:56 AM Richard Miller <9fans@hamnavoe.com> wrote= : > > > Do you mean something like BlackIce II (I'm under RV32I)? > > > > Yes, I have tried various soft cores on BlackIce (including > > one of my own design, for fun); also real silicon HiFive-1. > > So far none of these has had an MMU, which is required for > > Plan 9 (though not for Inferno). > > Speaking of RISC-V with MMU for Plan 9, Kendryte K210 is a 28nm MCU > with dual core RV64GC and Linux capable MMU (!). It has 8MB onchip > SRAM and also NN, FFT accelerators. > I think that makes a good platform for Plan 9 on RISC-V, on a real silico= n. > It also has a lot of really cheap evaluation board options available. > (The only other currently available RV64GC w/ MMU silicon is the > Hifive unleashed, which is very expensive.) > > The only major problem of K210 is that its IO capabilities are fairly > limited and you need external Ethernet/Wifi solutions on SPI bus, > which is likely slow. > > --000000000000de9289059049c873 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
By the way, I meant kendryte k210. and the board, for example, maix bit= , is very cheap (you can get a stock from Bangood.com)

=D1=81=D0=B1, = 17 =D0=B0=D0=B2=D0=B3. 2019 =D0=B3., 1:56 minux <minux.ma@gmail.com>:
On Fri, Aug 16, 2019 at 9:56 AM Richard Miller <9fans@hamnavoe.c= om> wrote:
> > Do you mean something like BlackIce II (I'm under RV32I)?
>
> Yes, I have tried various soft cores on BlackIce (including
> one of my own design, for fun); also real silicon HiFive-1.
> So far none of these has had an MMU, which is required for
> Plan 9 (though not for Inferno).

Speaking of RISC-V with MMU for Plan 9, Kendryte K210 is a 28nm MCU
with dual core RV64GC and Linux capable MMU (!). It has 8MB onchip
SRAM and also NN, FFT accelerators.
I think that makes a good platform for Plan 9 on RISC-V, on a real silicon.=
It also has a lot of really cheap evaluation board options available.
(The only other currently available RV64GC w/ MMU silicon is the
Hifive unleashed, which is very expensive.)

The only major problem of K210 is that its IO capabilities are fairly
limited and you need external Ethernet/Wifi solutions on SPI bus,
which is likely slow.

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