Bootloader barebox

• https://source.mnt.re/reform/mnt-reform-barebox
• barebox 2026.08.0-dirty documentation
• README-mnt.md

Installation

Always check if and of paths are correct. Use lsblk to verify.

Setup SD card

sudo dd if=pocket-reform-system-rk3588.img of=/dev/mmcblk0 bs=1M oflag=direct status=progress
sudo dd if=barebox-mnt-pocket-reform-rk3588.img of=/dev/mmcblk0 seek=64 oflag=direct status=progress

Test bootloader from SD card

1. Boot from SD card
2. Make backup of MMC bootloader:
   

   sudo dd if=/dev/mmcblk0 bs=1M count=10 of=emmc-backup.bin

    

3. Erase MMC bootloader first stage to force boot form SD card bootloader:
   

   sudo dd if=/dev/zero bs=512 seek=64 of=/dev/mmcblk0 count=2 oflag=direct

   
   
4. Turn off and on again.

5. Press m to get barebox boot menu

6.  Press 2 Detect bootsources and test if you can boot your normal OS.

From main OS install new bootloader to MMC

sudo dd if=/dev/mmcblk1 of=/dev/mmcblk0 bs=1M count=10 oflag=direct

1. Turn it off.
2. Take out SD card.
3. Boot again - it should boot your normal OS using barebox.