# lk

**Repository Path**: littlekernel/lk

## Basic Information

- **Project Name**: lk
- **Description**: The LK kernel is an SMP-aware kernel designed for small systems ported to a variety of platforms and cpu architectures.
- **Primary Language**: C
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 1
- **Created**: 2024-11-30
- **Last Updated**: 2025-11-12

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# The Little Kernel Embedded Operating System

The LK kernel is an SMP-aware kernel designed for small systems ported to a variety of platforms and cpu architectures.

See https://github.com/littlekernel/lk for the latest version.

### High Level Features

- Fully-reentrant multi-threaded preemptive kernel
- Portable to many 32 and 64 bit architectures
- Support for wide variety of embedded and larger platforms
- Powerful modular build system
- Large number of utility components selectable at build time

### Supported architectures

- ARM32
  - Cortex-M class cores (armv6m - armv8m)
  - ARMv7+ Cortex-A class cores
- ARM64
  - ARMv8 and ARMv9 cores
- RISC-V 32 and 64bit bit in machine and supervisor mode
- x86-32 and x86-64
- Motorola 68000
- Microblaze
- MIPS
- OpenRISC 1000
- VAX (experimental)

### [TODO](docs/todo.md)

### To build and test for ARM64 on linux

1. install or build qemu. v2.4 and above is recommended.
2. install gcc for arm64 (see note 1)
3. run scripts/do-qemuarm -6  (from the lk directory)
4. you should see 'welcome to lk/MP'

This will get you a interactive prompt into LK which is running in qemu
arm64 machine 'virt' emulation. type 'help' for commands.

Note: for ubuntu x86-64
sudo apt-get install gcc-aarch64-linux-gnu
or fetch a prebuilt toolchain from
https://newos.org/toolchains/aarch64-elf-14.1.0-Linux-x86_64.tar.xz