microwatt
lxp32-cpu
| microwatt | lxp32-cpu | |
|---|---|---|
| 19 | 2 | |
| 644 | 55 | |
| - | - | |
| 6.7 | 0.0 | |
| 29 days ago | over 1 year ago | |
| Verilog | Assembly | |
| GNU General Public License v3.0 or later | MIT License |
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microwatt
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Microwatt: A tiny Open POWER ISA softcore written in VHDL 2008
My favorite part of this project is the pretty large battery of test cases. A lot of chip rtl releases don't bother with open sourcing the verification too, and that's arguably more useful than the rtl in the first place.
https://github.com/antonblanchard/microwatt/tree/master/test...
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Arm wants to charge dramatically more for chip licenses
MicroWatt is the only one I know of.
https://github.com/antonblanchard/microwatt
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RISC-V Pushes into the Mainstream
I have several OpenPOWER systems, including the POWER9 I use as my usual desktop. Besides IBM and other server manufacturers like Tyan and Wistron, you can get them as Raptor workstations and servers.
If you want an OpenPOWER design to play with, look at Microwatt ( https://github.com/antonblanchard/microwatt ) which is complete enough to boot Linux.
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How long until RISC gets adopted for the desktop?
Not true, as of 2019 the power ISA is able to be used without needing to pay any royalties to ibm under the openpower foundation. There's already a few projects that have taken advantage of it such as libreSOC and Microwatt. Source code for various firmware components are also freely available pertaining to the power platform.
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Build Open Silicon with Google
https://github.com/antonblanchard/microwatt is an example of a Linux-capable 64-bit core that has been submitted on multiple Open MPW shuttles:
- Any raw binary generic platform-agnostic test roms for PowerPC?
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What would you think if the Amiga line jumped from PowerPc to RISC-V CPUs?
GitHub https://github.com/openpower-cores https://github.com/antonblanchard/microwatt
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Keeping POWER relevant in the open source world
At the other end of the scale, if anyone wants to play you can run a little openpower CPU on a FPGA with completely open source. https://github.com/antonblanchard/microwatt
It's capable of running Linux, some example docs are https://shenki.github.io/boot-linux-on-microwatt/
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What is your take on ISA architectures for FPGAs (x86, arm, risc-v)?
Why dismiss POWER or SPARC ? :-)
lxp32-cpu
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Minix
If you're willing to go REAL slow, there's still FPGAs. Something like this perhaps. Adoption would be pretty damned limited though, so your point stands.
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What is a list of all softcores that were designed purely using VHDL?
I used this one https://github.com/lxp32/lxp32-cpu as base for building a RISC-V softcore.
What are some alternatives?
chiselwatt - A tiny POWER Open ISA soft processor written in Chisel
neorv32 - :rocket: A tiny, customizable and extensible MCU-class 32-bit RISC-V soft-core CPU and microcontroller-like SoC written in platform-independent VHDL.
midimonster - Multi-protocol control & translation software (ArtNet, MIDI, OSC, sACN, ...)
zipcpu - A small, light weight, RISC CPU soft core
Apollo-11 - Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.
RISC-V-Guide - RISC-V Guide. Learn all about the RISC-V computer architecture along with the Development Tools and Operating Systems to develop on RISC-V hardware.
OpenSkyStacker - Multi-platform stacker for deep-sky astrophotography.
riscv_vhdl - Portable RISC-V System-on-Chip implementation: RTL, debugger and simulators
VexRiscvBPluginGenerator
openpiton - The OpenPiton Platform
librealsense - Intel® RealSense™ SDK
VexRiscv - A FPGA friendly 32 bit RISC-V CPU implementation