U-Boot for the Variscite VAR-SOM-MX8MN Symphony evaluation board

Quick Start

  • Build the ARM Trusted firmware binary

  • Get firmware-imx package

  • Build U-Boot

  • Boot

Get and Build the ARM Trusted firmware

Note: srctree is U-Boot source directory Get ATF from: tag: v2.5

$ make PLAT=imx8mn IMX_BOOT_UART_BASE=0x30a60000 bl31
$ cp build/imx8mn/release/bl31.bin $(srctree)

Get the ddr firmware

$ wget
$ chmod +x firmware-imx-8.9.bin
$ ./firmware-imx-8.9
$ cp firmware-imx-8.9/firmware/ddr/synopsys/ddr4*.bin $(srctree)

Build U-Boot

$ export CROSS_COMPILE=aarch64-linux-gnu-
$ make imx8mn_var_som_defconfig
$ make

Burn the flash.bin to MicroSD card offset 32KB:

$ dd if=flash.bin of=/dev/sd[x] bs=1024 seek=32 conv=notrunc


Set Boot switch to SD boot