Variscite IMX8M Mini Secure Boot || lock and close commands

[Sudharsun]

Hi,

I am currently working on the Variscite DART-MX8M-MINI platform and have successfully generated the HAB-related commands and programmed the required eFuses.

However, I am still looking for the correct commands and procedures for device closing, device locking, and additional security configurations (such as disabling JTAG) that can be executed through U-Boot for enhanced security.

I have gone through the available documentation, but most of the references I found are for i.MX5, i.MX6, and i.MX7 series devices. I was unable to locate clear and updated official documentation specifically for the i.MX8M Mini platform.

AN4581 Documentation

Could you please confirm whether the existing documentation for earlier i.MX series applies to i.MX8M Mini as well, or if there are updated/official documents specifically covering these security-related commands for this platform?

[Rita_Wang]

Hi @Sudharsun ,

For document you can refer to is the AN4581, and in my side I found the i.MX8M-specific secure boot guides also can do help for you:

uboot-imx/doc/imx/habv4/guides/mx8m_secure_boot.txt at maaxboard_v2020.04_5.4.24_2.1.0 · Avnet/uboot...

mx8m_spl_secure_boot.txt - doc/imx/habv4/guides/mx8m_spl_secure_boot.txt - U-boot source code v2026....

doc/imx/habv4/guides/mx8m_mx8mm_secure_boot.txt - uboot-imx - Git at Google

In the i.MX8M Mini Reference Manual you can see the section for JTAG.

For JTAG disable and fuse definition.

Hope this can do help for you

Wish you have a nice day

Best Regards

Rita