i.MX ProcessorsのトピックDebug port and cortex-A apps

Debug port and cortex-A apps

ravi_kohli — Tue, 04 Aug 2020 00:06:15 GMT

Hi,

I have SCU (CM4) debug port output from the UART and 2xCM4 UART serial access as well for the i.MX8QM EVK. Is there any serial output accessible from the AP cores (4xA53 and 2xA72) ? In other words, I don't see UART access for the AP cores. Is there some way for checking the start of any of the AP cores (A53 or A72) from the debug port or the SCU FW ?

Thanks in advance.

Re: Debug port and cortex-A apps

igorpadykov — Tue, 04 Aug 2020 04:27:16 GMT

Hi ravi.kohli

it is possible to create image with enabled Cortex-A and Cortex-M4 in

various combinations as described on

i.MX8 Boot process and creating a bootable image

For uart one can check:

imx8qm_mek.h\configs\include - uboot-imx - i.MX U-Boot

imx8qm_mek.c\imx8qm_mek\freescale\board - uboot-imx - i.MX U-Boot

cpu.c\imx8\mach-imx\arm\arch - uboot-imx - i.MX U-Boot

example of starting m4 from linux

m4ctrl - M4 Control Tool for i.MX platforms

Best regards
igor
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Re: Debug port and cortex-A apps

ravi_kohli — Tue, 04 Aug 2020 04:34:18 GMT

Thanks Igor.