Xous security focused open source on 22nm custom silicon

For those unfamiliar with this project:

Baochip is a license-free RISCV implementation with MMU. It is custom CPU logic hitchhiked on another company's SOC. The SOC is dual CPU like the rp2340, but with the other CPU fused off.

Xous is a an operating system that runs on the Baochip and an FPGA version of it.

Precursor is a prototype mobile hardware secrets device. It has an FPGA that runs Xous and costs around $600. One of the core goals of the project is to make inspectable hardware.

This baochip is the next step is to make prototype devices cheaper by running xous on the baochip instead of FPGA. The baochip is inspectable using a technique called IRIS.

Bunnie is leading this project.

https://youtu.be/DaWkfSmIgRs

This talk from 3c explains the hardware and operating system side of the project.

Interesting: https://baochip.com/.

I didn't know the concept of "Warrant Canary". [0]

[0]: https://en.wikipedia.org/wiki/Warrant_canary

https://archive.is/YSfin

This is a really interesting project IMO, especially the BIO programmable IO system (similar to RPi's PIO but open).

Two cores and 22nm doesn't scream performance if this is a general purpose CPU.