Hi Alexei,

Thanks for your reply. I have not verified the RESET_TO_BL1 for imx8qm yet. I will try it out and confirm. And, thanks for this suggestion.

Regards Ravi

On Oct 7, 2020, at 12:12 PM, Alexei Fedorov Alexei.Fedorov@arm.com wrote:

Hi Ravi,

Have you tried to use RESET_TO_BL31 build option for your platform?

Regards. Alexei From: TF-A <tf-a-bounces@lists.trustedfirmware.org mailto:tf-a-bounces@lists.trustedfirmware.org> on behalf of rkohli2000 gmail via TF-A <tf-a@lists.trustedfirmware.org mailto:tf-a@lists.trustedfirmware.org> Sent: 07 October 2020 17:01 To: tf-a@lists.trustedfirmware.org mailto:tf-a@lists.trustedfirmware.org <tf-a@lists.trustedfirmware.org mailto:tf-a@lists.trustedfirmware.org> Subject: [TF-A] BL31 as bootloader Hi, I'm a new user and sorry for some basic TF-A questions. Any guidance is appreciated.

I'm am able boot the TF-A bl31.bin image itself on my i.MX8QM MEK platform without using u-boot. I can use the imx-mkimage tool to create a flash or eMMC bootable image (flash.bin). Here, I can specify this container image with both bl31.bin and a separate custom app at a give flash address. This is without any security requirements or dependencies.

Can I use the T-FA bl31.bin image to act as a first stage bootloader (without u-boot) and then launch a "custom" bare metal app for Cortex-A53 (for example) on the i.MX8QM at the given (BL33) entry point 0x80020000 address ?

Thanks in advance. Ravi

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