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This repository is no longer maintained !!

Please use my buildroot repository instead:

https://github.com/damien-lemoal/buildroot

To build a Kendryte K210 boot image with kernel 5.8, do:

> git clone https://github.com/damien-lemoal/buildroot
> cd buildroot
> make kendryte_k210_defconfig
> make

The bootable image will be output/images/loader.bin. Flash it to the board using kflash.py.

Buildroot for RISC-V 64 NOMMU

Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation.

The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html

To build and use the buildroot stuff, do the following:

  1. run 'make menuconfig'
  2. select the target architecture and the packages you wish to compile
  3. run 'make'
  4. wait while it compiles
  5. find the kernel, bootloader, root filesystem, etc. in output/images

You do not need to be root to build or run buildroot. Have fun!

Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations.

Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC.

If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches

For riscv64 nommu uClibc toolchain build

$ make riscv64_nommu_defconfig
$ make

The compiled toolchain is in output/host. Copy this somewhere:

$ sudo cp -r output/host /opt/riscv64-uclibc

To compile a minimal busybox suitable for low-memory nommu system, use this toolchain together with the minimal configuration file provided.

$ cd riscv64-uclibc-nommu/
$ git clone git://git.busybox.net/busybox.git
$ cd busybox
$ make buildroot/riscv64-uclibc-nommu/busybox-small.config
$ make SKIP_STRIP=y
$ make SKIP_STRIP=y install

The base files usable for an initramfs image can be found in the directory _install/.

For conveniance, a precompiled toolchain, a set of initramfs files and its cpio image file are present in the riscv64-uclibc-nommu directory.

For Kendryte K210 boards

The built (or precompiled) initramfs cpio image file can be used as the default k210.cpio initramfs builtin the kernel (as referenced by nommu_k210_defconfig).

For conveniance, the K210 kernel support patches can be found in riscv64-uclibc-nommu/kernel-patches directory. A precompiled bootable kernel image including these patches and the simple initramfs.cpio userspace can be found in the kernel-image directory.