rz-community-bsp

This repository provides a basic BSP that will build a simple, usable image for Renesas RZ reference platforms.

It is designed to allow users to use the latest upstream open source projects and is provided as-is with no support from Renesas.

For supported and fully functional software from Renesas please use the official BSPs provided on renesas.com.

Dependencies

Name	Layers	Repository	Branch	Revision
poky	meta meta-poky meta-yocto-bsp	https://git.yoctoproject.org/poky	kirkstone scarthgap	kirkstone-4.0.16 b5624ee5
meta-arm	meta-arm-toolchain meta-arm	https://git.yoctoproject.org/meta-arm	kirkstone master	yocto-4.0.3 aba92504

Note: Scarthgap has not yet been released upstream, so current support is experimental.

Optional Dependencies

The following layers are only required when certain options are selected:

Condition	Name	Layers	Repository	Branch	Revision
Mainline kernel is selected via kas/kernel/mainline.yml or KERNEL_MAINLINE=y in kas menu	meta-linux-mainline	meta-linux-mainline	https://github.com/betafive/meta-linux-mainline	main	HEAD

Supported Machines

SoC	Reference Platform	Machine Name
Renesas RZ/G2H	RZ/G2H HopeRun Evaluation Kit	hihope-rzg2h
Renesas RZ/G2L	RZ/G2L SMARC Evaluation Kit	smarc-rzg2l
Renesas RZ/G2LC	RZ/G2LC SMARC Evaluation Kit	smarc-rzg2lc
Renesas RZ/G2UL	RZ/G2UL SMARC Evaluation Kit	smarc-rzg2ul

Provided Images

Image Name	Description	Key Features
renesas-image-minimal	Provides a basic image based on Poky's core-image.	Linux kernel U-Boot Trusted-Firmware-A

Building

This project is set up to be built with Kas. The Kas tool provides an easy mechanism to setup bitbake based projects. Documentation for Kas is available on readthedocs.io.

kas-container

The easiest way to use Kas is to use kas-container. This script will run the Bitbake built in a pre-configured Docker container.

For ease of use a copy of the script has been included in this repository.

Kas Menu

Kas supports a Kconfig based menu system which can be accessed with the kas menu (or kas-container menu) command. This allows users to easily select between options without having to manually select the kas yaml files required for their build.

Follow the instuctions in the menu to select the build configuration and then either "Save & Build" to save the configuration to a .config.yaml file and kick off a build straight way, or "Save & Exit" to only store the configuration to a .config.yaml file for future use.

Example kas menu usage:

# Make sure we're inside rz-community-bsp (this repository)
cd rz-community-bsp

./kas-container menu

If you exit the kas menu screen without selecting "Save & Build" you can subsequently start a build:

./kas-container build

Alternitively you can start a shell within the kas build environment that has already been configured for use with bitbake, with all dependencies checked out:

./kas-container shell

Kas with Configuraiton Fragments

The build can also be configured using a number of options provided in different kas yaml files. They can be daisy chained onto each other so that multple options can be selected.

kas/base.yml
This file adds in the base configuration used by this project. It is automatically included by the yocto version yaml files (see below).

kas/yocto/*.yml
This includes the dependency configuration for building the rz-community-bsp based on specific versions of Yocto.

kas/machine/*.yml
A selection of files to use to specify which machine to build for.

kas/image/*.yml
A selection of files to use to specify which image to build.

kas/kernel/*.yml
A selection of files to use to specify which Linux kernel version to build.

kas/u-boot/*.yml
A selection of files to use to specify which U-Boot version to build.

kas/trusted-firmware-a/*.yml
A selection of files to use to specify which Trusted-Firmware-A version to build.

kas/opt/gitlab-ci-cache.yml
A special option that can be used to configure the sstate and downloads directory locations so that they can be used easily with GitLab CI/CD caching.

kas/opt/debug.yml
Add various features to the image to help with development and debugging.
Specifically, it enables the debug-tweaks image feature that allows users to
be able to login without a password. More information can be found
here.

Example usage:

# Make sure we're inside rz-community-bsp (this repository)
cd rz-community-bsp

# Yocto: kirkstone
# Image: renesas-image-minimal
# Machine: hihope-rzg2h
# Linux: linux-renesas v5.10
./kas-container build kas/yocto/kirkstone.yml:kas/opt/debug.yml:kas/image/renesas-image-minimal.yml:kas/machine/hihope-rzg2h.yml:kas/kernel/renesas-5.10.yml

# Yocto: kirkstone
# Image: renesas-image-minimal
# Machine: smarc-rzg2l
# Linux: linux-cip v6.1
./kas-container build kas/yocto/kirkstone.yml:kas/opt/debug.yml:kas/image/renesas-image-minimal.yml:kas/machine/smarc-rzg2l.yml:kas/kernel/cip-6.1.yml

# If you are re-building in the same directory as a previous build it may be
# prudent to use --update and --force-checkout to ensure that the dependency
# repositories are correct
./kas-container build --update --force-checkout kas/yocto/kirkstone.yml:kas/opt/debug.yml:kas/image/renesas-image-minimal.yml:kas/machine/hihope-rzg2h.yml:kas/kernel/cip-6.1.yml

Building the SDK

In order to (cross) compile applications to run on the flashed image an SDK is needed. Yocto provides a way to build this SDK and create a suitable installer for your build machine.

The architecture (e.g. x86_64, aarch64) of the machine where the SDK is to be used can be set in local.conf with the SDKMACHINE variable. It can also be configured in the kas menu.

To build the SDK installer package run the following, replacing renesas-image-minimal with the target image of your choice:

bitbake renesas-image-minimal -c populate_sdk

The SDK installer (the *.sh file) will be output to the standard deploy directory. Here is an example:

ls tmp/deploy/sdk
poky-glibc-x86_64-renesas-image-minimal-cortexa55-smarc-rzg2l-toolchain-4.0.16.host.manifest
poky-glibc-x86_64-renesas-image-minimal-cortexa55-smarc-rzg2l-toolchain-4.0.16.sh
poky-glibc-x86_64-renesas-image-minimal-cortexa55-smarc-rzg2l-toolchain-4.0.16.target.manifest
poky-glibc-x86_64-renesas-image-minimal-cortexa55-smarc-rzg2l-toolchain-4.0.16.testdata.json

Contributions

Contributions are very welcome! Please submit a pull request for review.

License

This repository and its contents is licensed under MIT. See COPYING.MIT for details.

Maintenance

This repository provided on a best-effort basis. There are no promises that everything will work!

Maintainer: Chris Paterson

• Email: [email protected]
• GitHub/GitLab username: patersonc
• IRC (Libera.Chat): patersonc