This configuration package configures Buildroot to produce a BSP image for the Jetson TX1, TX2, AGX Xavier, or Nano boards.
There are specific configurations for each board, see "Board Compatibility."
Currently tested on the TX2 and Nano. Issue reports welcome.
There are specific packages tuned to each model.
| Board | Config Package |
|---|---|
| Jetson Nano | jetson/nano |
| Jetson TX2 | jetson/tx2 |
See the readme for the individual board package.
The TX2 and recent boards boot from the internal eMMC, at mmcblk0p1. The Jetson Nano can boot to a SD card.
A "secure boot" process is used, with multiple bootloaders:
- BootROM -> MB1 (TrustZone)
- MB2/BPMP -> (Non-Trustzone)
- Cboot (uses Little Kernel)
- Uboot
- Kernel
Uboot is flashed to the mmcblk0p1 emmc partition, and searches for the "boot/extlinux/extlinux.conf" file in the persist partition.
The nvidia boards come with a Skiff Core configuration which installs the JetPack debs inside the container. This brings in support for the NVIDIA JetPack features, even inside the Core docker container, automatically.
The required partition layout is somewhat complex and does not provide an opportunity for separate "persist" and "boot" partitions as typically used by other Skiff boards:
- APP: at mmcblk0p1: contains the main system read-write filesystem.
- TBC: TegraBoot CPU-side binary.
- RP1: Bootloader DTB binary.
- EBT: CBoot, the final boot stage CPU bootloader binary.
- WB0: Warm boot binary.
- BPF: SC7 entry firmware.
- BPF-DTB: Reserved for future use by BPMP DTB binary; can't remove.
- FX: Reserved for fuse bypass; removeable.
- TOS: Required. Contains TOS binary.
- DTB: Contains kernel DTB binary.
- LNX: Contains U-Boot, which loads and launches the kernel.
- EKS: Contains "the encrypted keys".
- BMP: Contains BMP images for splash screen display during boot.
- RP4: Contains XUSB module’s firmware file, making XUSB a true USB 3.0 host.
- GPT: Contains secondary GPT of the sdcard device.
Unfortunately, the complex partition layout is unavoidable, but the Skiff install and OTA scripts are careful to handle it properly.
The NVIDIA Linux4Tegra packages are licensed under the NVIDIA Customer Software License. Skiff does not directly redistribute any parts of the toolkit, but will download it as a Buildroot package from the NVIDIA servers as part of the build process. The appropriate licenses can be viewed by triggering the Buildroot "legal" build step. It is the responsibility of the end user / developer to be aware of these terms and follow them accordingly.