From iMXwiki

U-Boot is a bootloader, which supports some i.MX SoCs.

Configuring U-Boot

Creating a uImage to U-Boot using LTIB

i.MX25 PDK

Splash Screen on u-boot for i.MX25

Boot Linux from SD Card using u-boot

i.MX27 ADS Board

Compiling U-Boot for iMX27ADS

Installing U-Boot on iMX27ADS

i.MX31 ADS Board

Compiling U-Boot for iMX31ADS

Installing U-Boot on iMX31ADS

i.MX31 PDK Board

i.MX51 EVK Board

Working with mainline U-Boot

Compiling U-Boot (from Freescale BSP) using LTIB

Changing environment variables storage on U-Boot

Installing U-Boot on i.MX51EVK