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I have ported RISC-V rocket-chip generated cores (RV64IMA @ 50 MHz and RV64IMAFD @ 25 MHz) on Parallella for my GSoC project.
A bitstream with either of them can boot RISC-V Linux (with RISC-V poky root image) on your Parallella.
You also won't lose any original Parallella functionality since I included everything the original bitstreams provide (E-Link, I2C, GPIO).
The default core without FPU (RV64IMA) boots on all Parallella versions, while the bigger one which contains the FPU (RV64IMAFD) can only fit on the Kickstarter and Embedded versions that have the bigger Zynq device.
You can find the parallella-riscv repo here:
I will soon update with more content the blog where I describe my project:
It would be great if you can test things out (master branch) and if possible report me of any problems you encountered.
Cheers,
Elias
Statistics: Posted by eliaskousk — Thu Aug 04, 2016 4:47 pm
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I even have a better dream if possible: a pilchard-like card. Pilchard was an FPGA you were inserting in a memory slot, that was space odyssey - I mean, in 2001.
You'd then get the better of both worlds: my 32 Gb DDR4 RAM would be as near as it could from my beloved Epiphany de la Parallella
I agree ; any code with (very low RAM needs and) lots of branchs should behave very well with Epiphany (penalty is only 0 or 3 cycles), much better than with GPU or heavy pipelined x86 CPU.
I've tried both ; GPU was a failure (same experiment from another guy) ; whereas Paralle2 - a simple backtracker for Eternity II-like puzzles - works great for Epiphany.
Epiphany does the same job as two thirds of a high end CPU single core (core i7 Haswell 5820k, turbo mode 3.6 GHz) - with low power 4.7 W instead of 72 W O_O
You should have few data and much computation ; I currently code a simple OCR (Optical Character Recognition), maybe it could fit too.
Statistics: Posted by DonQuichotte — Mon Jun 06, 2016 11:13 am
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