al1img / meta-xt-prod-devel-rcar-gen4

Renesas R-Car Gen4 development product

meta-xt-rcar-gen4

This repository contains Renesas R-Car Gen4-specific Yocto layers for Xen Troops distro. Some layers in this repository are product-independent. They provide common facilities that may be used by any xt-based product that runs on Renesas Gen4-based platforms.

Those layers may be added and used manually, but they were written with Moulin build system, as Moulin-based project files provide correct entries in local.conf

Status

This is a release 0.5.2 of the Xen-based development product for the S4 Spider board.

This release provides the following features:

• Xen build compatible with S4 SoC
• Thin Dom0
• Driver domain (DomD), which has access to all available hardware
• Optional generic domain (DomU)
• Support for OP-TEE in virtualization mode
• ICCOM partitioning demo (proprietary components are required to test the feature)

The following HW modules were tested and are confirmed to work:

• Serial console (HSCIF)
• IPMMUs
• R-Switch (tsn0 interface only)
• eMMC
• PCIe with ITS

External dependencies

At least IPL 0.5.0 is required for normal operation. Release was tested with IPL 0.7.0. User is required to flash ARM TF (bl31-spider.srec) and OP-TEE (tee-spider.srec) provided by the build to ensure that Xen and DomD/DomU will work correctly.

Building

Requirements

1. Ubuntu 18.0+ or any other Linux distribution which is supported by Poky/OE
2. Development packages for Yocto. Refer to Yocto manual.
3. You need Moulin installed in your PC. Recommended way is to install it for your user only: pip3 install --user git+https://github.com/xen-troops/moulin. Make sure that your PATH environment variable includes ${HOME}/.local/bin.
4. Ninja build system: sudo apt install ninja-build on Ubuntu

Fetching

You can fetch/clone this whole repository, but you actually only need one file from it: prod-devel-rcar-s4.yaml. During the build moulin will fetch this repository again into yocto/ directory. So, to reduce possible confuse, we recommend to download only prod-devel-rcar-s4.yaml:

# curl -O https://raw.githubusercontent.com/xen-troops/meta-xt-prod-devel-rcar-gen4/spider-0.5.2/prod-devel-rcar-s4.yaml

Building

Moulin is used to generate Ninja build file: moulin prod-devel-rcar-s4.yaml. This project provides number of additional parameters. You can check them with --help-config command line option:

# moulin prod-devel-rcar-s4.yaml --help-config
usage: moulin prod-devel-rcar-s4.yaml [--ENABLE_DOMU {no,yes}]

Config file description: Xen-Troops development setup for Renesas RCAR Gen4
hardware

optional arguments:
  --ENABLE_DOMU {no,yes}
                        Build generic Yocto-based DomU

Only one machine is supported as of now: spider. You can enable or disable DomU build with --ENABLE_DOMU=yes option. Be default it is disabled.

So, to build with DomU (generic Yocto-based virtual machine) use the following command line: moulin prod-devel-rcar-s4.yaml --ENABLE_DOMU=yes.

Moulin will generate build.ninja file. After that run ninja to build the images. This will take some time and disk space as it builds 3 separate Yocto images.

Creating SD card image

Using Ninja

Latest versions of moulin will generate additional ninja targets for creating images. In case of this product please use

# ninja image-full

To generate SD/eMMC image full.img. You can use dd tool to write this image file to a SD card:

# dd if=full.img of=/dev/sdX conv=sparse

If you want to write image directly to a SD card (e.g. without creating full.img file), you will need to use manual mode, which is described in the next subsection.

Manually, using rouge

Image file can be created with rouge tool. This is a companion application for moulin.

Right now it works only in standalone mode, so manual invocation is required. It accepts the same parameters: --ENABLE_DOMU.

This XT product provides only one image: full.

You can prepare the image by running

# rouge prod-devel-rcar-s4.yaml --ENABLE_DOMU=yes -i full

This will create file full.img in your current directory.

Also you can write image directly to an SD card by running

# sudo rouge prod-devel-rcar.yaml --ENABLE_DOMU=yes -i full -so /dev/sdX

BE SURE TO PROVIDE CORRECT DEVICE NAME. rouge has no interactive prompts and will overwrite your device right away. ALL DATA WILL BE LOST.

It is also possible to flash the image to the internal eMMC. For that you may want booting the board via TFTP and sharing DomD's root file system via NFS. Once booted it is possible to flash the image:

# dd if=/full.img of=/dev/mmcblk0 bs=1M

For more information about rouge check its manual.

U-boot environment

Please make sure 'bootargs' variable is unset while running with Xen:

unset bootargs

It is possible to run the build from TFTP+NFS and eMMC. With NFS boot is is possible to configure board IP, server IP and NFS path for DomD and DomU. Please set the following environment for that:

setenv set_pcie 'i2c dev 0; i2c mw 0x6c 0x26 5; i2c mw 0x6c 0x254.2 0x1e; i2c mw 0x6c 0x258.2 0x1e'

setenv bootcmd 'run set_pcie; bootcmd_tftp'
setenv bootcmd_mmc0 'run mmc0_xen_load; run mmc0_dtb_load; run mmc0_kernel_load; run mmc0_xenpolicy_load; run mmc0_initramfs_load; bootm 0x48080000 0x84000000 0x48000000'
setenv bootcmd_tftp 'run tftp_xen_load; run tftp_dtb_load; run tftp_kernel_load; run tftp_xenpolicy_load; run tftp_initramfs_load; bootm 0x48080000 0x84000000 0x48000000'

setenv mmc0_dtb_load 'ext2load mmc 0:1 0x48000000 xen.dtb; fdt addr 0x48000000; fdt resize; fdt mknode / boot_dev; fdt set /boot_dev device mmcblk0'
setenv mmc0_initramfs_load 'ext2load mmc 0:1 0x84000000 uInitramfs'
setenv mmc0_kernel_load 'ext2load mmc 0:1 0x7a000000 Image'
setenv mmc0_xen_load 'ext2load mmc 0:1 0x48080000 xen'
setenv mmc0_xenpolicy_load 'ext2load mmc 0:1 0x7c000000 xenpolicy'

setenv tftp_configure_nfs 'fdt set /boot_dev device nfs; fdt set /boot_dev my_ip 192.168.1.2; fdt set /boot_dev nfs_server_ip 192.168.1.100; fdt set /boot_dev nfs_dir "/srv/domd"; fdt set /boot_dev domu_nfs_dir "/srv/domu"'
setenv tftp_dtb_load 'tftp 0x48000000 r8a779f0-spider-xen.dtb; fdt addr 0x48000000; fdt resize; fdt mknode / boot_dev; run tftp_configure_nfs; '
setenv tftp_initramfs_load 'tftp 0x84000000 uInitramfs'
setenv tftp_kernel_load 'tftp 0x7a000000 Image'
setenv tftp_xen_load 'tftp 0x48080000 xen-uImage'
setenv tftp_xenpolicy_load 'tftp 0x7c000000 xenpolicy-spider'