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xous-core/kernel
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bunnie 1effeab858 add legacy_int handler to the kernel, handle vexii init case 
The "main" product line is affected here in that the UART
init is hosted above the trng init. This should have no impact
on security or boot time, but allows us to more easily debug
TRNG init issues. This is necessary because in the vexii test
version the XADC interface is broken by the slower clocking
and I'm not taking the time to trace down that issue as it
does nothing to further the goal of testing the vex-ii core
in a non-production config.

legacy_int handler allows vex-ii to emulate/behave like the vex-i
in terms of interrupt handling.

eventually this will be replaced with/augmeted by a PLIC.
2025-07-21 17:11:23 +08:00
..
bin add the .a artifacts to the tree for the asm.S 2024-01-06 16:41:40 +08:00
src add legacy_int handler to the kernel, handle vexii init case 2025-07-21 17:11:23 +08:00
test add a target for the kernel specifically on the boards 2025-05-06 19:09:37 +08:00
assemble.ps1 kernel: asm: align kernel stack to 16 bytes 2023-12-29 18:15:48 +08:00
assemble.sh kernel: asm: align kernel stack to 16 bytes 2023-12-29 18:15:48 +08:00
build.rs ok, format the kernel now that all in-line assembly has been checked 2024-01-14 19:27:14 +08:00
Cargo.toml add legacy_int handler to the kernel, handle vexii init case 2025-07-21 17:11:23 +08:00
link.x add an "endcap" to the kernel region 2023-01-17 23:07:05 +08:00
README.md

README.md

Xous Kernel

This contains the core kernel for Xous. It requires a stage 1 loader in order to start up, as it assumes the system is already running in Supervisor mode.

Building

To build the kernel, you will need a riscv32 target for Rust. Possible targets include riscv32i-unknown-none-elf, riscv32imac-unknown-none-elf, or riscv32imac-unknown-xous-elf.

  1. Decide what target you want. For simple, embedded systems this could be riscv32i-unknown-none-elf, and for more complex systems with compressed instructions you could use riscv32imac-unknown-none-elf.
  2. Get Rust. Go to https://rustup.rs/ and follow its instructions.
  3. Install the proper toolchain: rustup target add ${target_arch}
  4. Build the kernel: cargo build --release --target ${target_arch}

Using

To use the kernel, you must package it up into an arguments binary with xous-tools.

Testing

TBD

Contribution Guidelines

Contributor Covenant

Please see CONTRIBUTING for details on how to make a contribution.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide its terms.

License

Copyright © 2020

This project is licensed under the Apache License 2.0 LICENSE. For accurate information, please check individual files.