c5aee47861
I think it's more Xous-y to punt to userland in the case that no consecutive memory is found, rather than trying to implement an evictor in the kernel itself. For now, the blunt hammer we use is to simply request some blocks be freed and we retry; this works well enough to find blocks of a few pages in sequence. If we needed larger blocks, we may want to consider modifying the swapper userland algorithm to have some API for finding consecutive runs of non-wired memory to swap out. |
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| .. | ||
| bin | ||
| src | ||
| assemble.ps1 | ||
| assemble.sh | ||
| build.rs | ||
| Cargo.toml | ||
| link.x | ||
| 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.
- 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 useriscv32imac-unknown-none-elf. - Get Rust. Go to https://rustup.rs/ and follow its instructions.
- Install the proper toolchain:
rustup target add ${target_arch} - 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
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.