May 26, 2018


U-Boot loader for Gumstix Duovero.

To install this bootloader, copy the files MLO and u-boot.img to the FAT partition on an SD card. Normally this is partition 1, but different partitions can be set with U-Boot environment variables.

This version is patched so that

  • ELF and API features are enabled.
  • The default environment is trimmed to just what’s needed to boot.
  • The saveenv command writes to the file uboot.env on the FAT partition.
  • The DTB file name is passed to ubldr using the fdtfile env variable. The default is omap4-duovero-parlor.dtb for a Parlor expansion board. ubldr loads the DTB from /boot/dtb/ on the FreeBSD partition. Not tested
  • By default, it loads ELF ubldr from file ubldr on the FAT partition to address 0x88000000, and launches it.

For information about running FreeBSD on Duovero, see https//

For general information about U-Boot see WWW http//