BlackParrot aims to be the default Linux-capable, cache-coherent, RV64GC multicore used by the world.
The next release of BlackParrot, v 1.0, is coming in January 2020, and will contain support for 1 to 24-way cache coherent multicore, and include baseline user and privilege mode functionality and run Linux.
A 14-nm BlackParrot multicore chip was taped out in July 2019.
- bp_fe/ contains the front-end (FE) of BlackParrot, responsible for speculative fetching of instructions.
- bp_be/ contains the back-end (BE) of BlackParrot, responsible for atomically executing instructions, as well as logically controlling the FE.
- bp_me/ contains the memory-end (ME) of BlackParrot, responsible for servicing memory/IO requests as well as maintaining cache coherence between BlackParrot cores.
- bp_top/ contains configurations of FE, BE, and ME components. For instance, tile components and NOC assemblies.
- bp_common/ contains the interface components which connect FE, BE and ME. FE, BE, ME may depend on bp_common, but not each other.
- external/ contains submodules corresponding to tooling that BlackParrot depends upon, such as the riscv-gnu-toolchain and Verilator.
Working document is here: https://docs.google.com/document/d/11kXYtJNYU8KpUl5uo1vKjAUDdxn5DxK5cAOT29KwN7Y/edit#
BlackParrot is an aggresively modular design: communication between the components is performed over a set of narrow interfaces. The interfaces are designed to allow implementations of the FE, BE or ME to change independently of one another.
Coming soon!
- Be TINY
- When deliberating between two options, consider the one with least hardware cost/complexity.
- Be Modular
- Prevent tight coupling between modules by designing latency insenstive interfaces.
- Be Friendly
- Combat NIH, welcome external contributions and strive for infrastructure agnosticism.
Below is the current status of BlackParrot CI builds. Upon commit to the listed branch, a Verilator-based regression consisting of full-system riscv-tests and module level tests is run and checked for correctness.
NOTE: Work is in progress to continuously verify synthesizability and PPA.
master:
dev:
