RK3399 boot sequence
Rockchip RK3399 boot sequence
This is for the Pine64 ROCKPro64 single board computer, and the Pinebook Pro laptop boot sequence details. While some of this may also apply to other RK3399 computers, that is up to the reader to make any appropriate changes.
Description
There are 3 sections for the boot loader. They are in order, without gap, though their is no need to use all the space.
Here are the details:
| Start in sectors |
Size in sectors |
Name | Description |
|---|---|---|---|
| 64 | 16320 | IDBLoader | SoC initialization code |
| 16384 | 8192 | OS loader | Generally U-Boot |
| 24576 | 8192 | TrustedFirmware-A |
General maintenance
If a new U-Boot is supplied, it is generally installed similar to this;
# dd if=/boot/idbloader.img conv=notrunc seek=64 of=/dev/mmcblkX # dd if=/boot/u-boot.itb conv=notrunc seek=16384 of=/dev/mmcblkX
Different devices
The RK3399 boots to multiple devices. Boot device selection is done in the following order, it can not be changed.
If a device is blank / un-used, the SoC code moves on to the next device in the list.
- SPI
- eMMC
- SD card
However, whence the user boot code runs, it can then give priority to other devices, if available.