i.MX ProcessorsのトピックRe: Cortex-M4 Core1 is not working in IMX8QM CPU

Cortex-M4 Core1 is not working in IMX8QM CPU

pranav_vaze — Tue, 26 Feb 2019 08:35:27 GMT

Hi,

We are testing M4 cores in IMX8QM with pre-build and compiled binaries, in this M4 Core0 is working without any issues.

The M4 Core1 is not working with both the pre-build and compiled binaries. We are able to access the M4 Core0 and Core1 UARTs pin as GPIO in U-boot. We are using 4.14.78-GA BSP release SCFW.

Regards,
Pranav

Re: Cortex-M4 Core1 is not working in IMX8QM CPU

art — Tue, 26 Feb 2019 09:47:15 GMT

Please refer to the attached document, especially, to its Section 4.7.6 "Running the Arm Cortex-M4 image" for the information on how to build images and run the code on the M4 core(s) on various asymmetric multicore i.MX processors, including the i.MX8QM one.

Re: Cortex-M4 Core1 is not working in IMX8QM CPU

pranav_vaze — Tue, 26 Feb 2019 13:17:45 GMT

Hi Artur,

   We are following same commands for creating M4 binaries for booting from u-boot and booting from ROM options.
   The M4 Core0 is booting with both the boot options (We are getting output messages in M4-Core0 UART).
   The M4 Core1 is not booting with both the boot options.

Regards,

Pranav

Re: Cortex-M4 Core1 is not working in IMX8QM CPU

art — Mon, 04 Mar 2019 04:43:09 GMT

How do you define that the M4 Core1 does not boot? By absence of the UART output from it? Which UART do you assign to M4 Core1?

Artur