[J-core] We have started!

[Joh-Tob Schäg]

Great to see thing moving again. This email chain however ended in my spam box.

On Mon, 16 Mar 2020 at 03:57, D. Jeff Dionne <jeff at coresemi.io> wrote:
>
> Forgot to attach this inital, quick and dirty synthesis report
>
> 2.52. Printing statistics.
>
> === cpu ===
>
>    Number of wires:              10384
>    Number of wire bits:          16211
>    Number of public wires:       10384
>    Number of public wire bits:   16211
>    Number of memories:               0
>    Number of memory bits:            0
>    Number of processes:              0
>    Number of cells:              11281
>      CCU2C                         199
>      L6MUX21                      1087
>      LUT4                         6745
>      MULT18X18D                      2
>      PFUMX                        2156
>      TRELLIS_DPR16X4                32
>      TRELLIS_FF                   1060
>
> J.
>
> On 月, 3月 16, 2020 at 11:56 午前, D. Jeff Dionne <jeff at coresemi.io> wrote:
>
> I did a quick feasibility check of the CPU with GHDL synth and yosys, it looks like the 45k gate device would be better for a full SMP system with DDR RAM.  The GHDL and Yosys tool flow is getting pretty good now, but we've still not managed to get a bitstream out of it and nextpnr for somehting meaningful... rapidly advancing though.
>
> The sticking point for this board is the SDRAM... J-Core memory controller only supports DDR, DDR2 and LPDDR.  There are a few boards with this issue that J-Core could support if we were to write a simple SDRAM controller, or I suppose we could bolt someone else's on.  Still a bit of work to teach the SoC generator how to connect the bus bridges and cache controllers.
>
> J.
>
> On 日, 3月 15, 2020 at 11:44 午後, Goran Mahovlić <goran.mahovlic at gmail.com> wrote:
>
> Hopefully someone will now port J-CORE to ULX3S
>
> https://www.crowdsupply.com/radiona/ulx3s
>
> 12F should be more then enough!
>
> We already have Litex linux and SaxonSoc linux samples
>
> https://twitter.com/lawriegriffiths/status/1238030666719207425
>
> Goran
>
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