2380848_en-US

imx95 M7 boot

Hello,

Can you please tell me how to boot the cortex M7 from uboot?

It seems that cortex a55/uboot have no access to the TCM of M7, so it is not possible to load the image. On the other hand, the M33 crashed when the M7 is released on 0x9000 0000.

It seems the the uboot commands (bootaux, prepaux, stopaux) have no effect at all, on uboot version 04.2025.

I tried to boot the M7 with the SM on M33, I can stop it, change the boot vector, but releasing it on DDR memory causes an error.

Can you give me some hints how to properly start the M7 with uboot or SM, or how to allow ddr access for the M7?

Thank you in advance!

Re: imx95 M7 boot

Hello,

I suggest you take a look in the next application note:

https://docs.nxp.com/bundle/AN14748/page/topics/introduction.html

Best regards.

Re: imx95 M7 boot

Hello,

thank you for your reply.

Unfortunately, the Application Note you mentioned, does not describe how to start the M7 core neither from Uboot, nor with SM on M33.

It also doesn't mention how to configure the platform to provide DDR access to the M7.

Can you help me with these topics? Do you have any suggestions? When will the booaux,prepaux and stopaux commands be fully implemented and usable in uboot?

Thanks in advance!

Re: imx95 M7 boot

Hello,

Please take a look in section 4.7.4.1.5 i.MX 95 of i.MX Linux User's Guide.

Best regards.