Internal Boot ROM (Mk II)

The internal SoC Boot ROM is permanently set by the processor manufacturer (NXP), for verification purposes its initial 92KB can be dumped with a custom imx6ul_bootrom-dump utility.

The last 4KB section is a protected area and therefore not accessible.

$ gcc -o imx6ul_bootrom-dump imx6ul_bootrom-dump.c
$ sudo ./imx6ul_bootrom-dump 0x00000000 92 > imx6ul-bootrom-92K.bin

The resulting binary images can be verified by comparing their SHA256 hashes with the following ones:

Model	P/N	SHA256
i.MX6ULZ	MCIMX6Z0DVM09AB	1727a0f46dbde555b583e9a138ae359389974b7be4369ffd4a252a8730f7e59b
i.MX6ULL	MCIMX6Y2DVM09AB	1727a0f46dbde555b583e9a138ae359389974b7be4369ffd4a252a8730f7e59b
i.MX6UL	MCIMX6G3DVM05AB	1f7bb1207c378e9b3da051b6195151661522eeaec17d557ecd855fb56eb374e7
i.MX6UL	MCIMX6G2DVM05AB	ee21dac73ac185510b2d5cb5953db29cb2f20b95be8971a1b2f10b33d337b996