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Even though the example shown here refers to an i.MX6 UltraLite board, the approach is substantially the same across all the i.MX6 family.
The test bed used in this example consists of an i.MX6 UltraLite board equipped with a 128MB 8-bit asynchronous 1-bit ECC SLC NAND memory which is connected to the EIM bus of the SoC. The boot firmware image is the U-Boot binary files (<code>desk-mx6ul-l-3.0.0_mx6uldesk_axelulite_devel_SPL0_mx6uldesk_axelulite_nand_SPL</code> and <code>desk-mx6ul-l-3.0.0_mx6uldesk_axelulite_devel_u0_mx6uldesk_axelulite_nand_u-boot.img</code>). Its size is about 44 kB and 592 kB. From the point of view of MTD partitions, the boot partition for SPL is <code>mtd0</code> is 2MB while the second stage partition <code>mtd1</code> is 6MB.
===Boot partition organization===
===How to burn the boot partition===
The burning of the boot partition is performed by the [https://github.com/NXPmicro/imx-kobs <code>kobs-ng</code> tool] and the standard [http://git.infradead.org/mtd-utils.git <code>flash_erase</code> and <code>nandwrite</code>] flash utilities.
<pre class="workstation-terminal">
root@desk-mx6ul-axelulite:~# kobs-ng -x -v -w desk-mx6ul-l-3.0.0_mx6uldesk_axelulite_devel_SPL0_mx6uldesk_axelulite_nand_SPL
MTD CONFIG:
chip_0_device_path = "/dev/mtd0"
root@desk-mx6ul-axelulite:~# flash_erase /dev/mtd1 0 0
Erasing 128 Kibyte @ 5e0000 -- 100 % complete
root@desk-mx6ul-axelulite:~# nandwrite -p /dev/mtd1 desk-mx6ul-l-3.0.0_mx6uldesk_axelulite_devel_u0_mx6uldesk_axelulite_nand_u-boot.img
Writing data to block 0 at offset 0x0
Writing data to block 1 at offset 0x20000