Content Comparison

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This will generate SPL and u-boot.img to be used when booting from eMMC. To target other boot media, set one of the following options in configs/mx6cuboxi_defconfig or through menuconfig:

• eMMC data partition (default)

  Code Block
  CONFIG_SPL_BOOT_DEVICE_MMC=y

• eMMC boot0 partition

  Code Block
  CONFIG_SYS_MMC_ENV_PART=1

• eMMC boot1 partition

  Code Block
  CONFIG_SYS_MMC_ENV_PART=2

• SD-Card

  Code Block
  CONFIG_SPL_BOOT_DEVICE_SDHC=y

• mSATA SSD

  Code Block
  CONFIG_SPL_BOOT_DEVICE_SATA=y CONFIG_SCSI_AHCI=y CONFIG_SPL_SATA_RAW_U_BOOT_USE_SECTOR=y CONFIG_SPL_SATA_RAW_U_BOOT_SECTOR=0x8a CONFIG_ENV_IS_NOWHERE=y

• SPI

  Code Block
  CONFIG_SPL_BOOT_DEVICE_SPI_FLASH=y

Note: The resulting binaries are SPL and u-boot.img.

eMMC Tips

Size matters: The production line burns the image to emmc. the process runs at 5.6 MB/sec, which means that burning 8GB image of which 80% is free space is very wasteful. The best way to optimize for production is to create a single partition (as small as possible to contain all the data), and a “firstboot” script that will complete the image creation.

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