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android-review.linaro.org / kernel / lk / b0b2665cead5da9efdc6f376c13ab756b7a77e38
commitb0b2665cead5da9efdc6f376c13ab756b7a77e38[log] [tgz]
authorMatt Schulte <matsch@google.com>Tue Nov 07 11:03:59 2023 -0800
committerTravis Geiselbrecht <travisg@gmail.com>Mon Dec 04 00:53:01 2023 -0800
tree05ae040ab7b6f13e3a3f3aec50eb32b880d80280
parent94a15119b2fe50a076f73e502566895e357b77ff [diff]
[make] Add ability to deny modules from being used

Certain projects may want to prevent the usage of certain modules from
being used. Here are two examples of when this may occur:

1. The Project has it's own fdt library and does not want developer's
   using the version of libfdt included with LK

2. The project does not want developers using mincrypt.

`DENY_MODULES` is a list which developers can set in their own project
makefiles which is checked on each module inclusion. If that module is
on the deny list, it causes a build failure.
2 files changed
tree: 05ae040ab7b6f13e3a3f3aec50eb32b880d80280
  1. .github/
  2. app/
  3. arch/
  4. dev/
  5. docs/
  6. external/
  7. kernel/
  8. lib/
  9. make/
  10. platform/
  11. project/
  12. scripts/
  13. target/
  14. tools/
  15. top/
  16. .gitignore
  17. engine.mk
  18. LICENSE
  19. lk_inc.mk.example
  20. makefile
  21. README.md
README.md

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
  • RISC-V 32 and 64bit bit in machine and supervisor mode
  • x86-32 and x86-64 386 up through modern cores
  • microblaze
  • MIPS
  • OpenRISC 1000

TODO

To build and test for ARM on linux

  1. install or build qemu. v2.4 and above is recommended.
  2. install gcc for embedded arm (see note 1)
  3. run scripts/do-qemuarm (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 arm machine 'virt' emulation. type 'help' for commands.

Note: for ubuntu x86-64: sudo apt-get install gcc-arm-none-eabi or fetch a prebuilt toolchain from https://newos.org/toolchains/x86_64-elf-10.2.0-Linux-x86_64.tar.xz