topic Re: IMx7 Solo M4 boot in i.MX Processors

IMx7 Solo M4 boot

makrist — Mon, 26 Sep 2016 00:10:30 GMT

Hello all,

Is it possible on IMx7 Solo to run application only for M4 core and not boot linux on A7 core?

Re: IMx7 Solo M4 boot

igorpadykov — Mon, 26 Sep 2016 06:04:07 GMT

Hi Lukaz

processor boot options are given in sect.6.6 System Boot i.MX7D Reference Manual

http://cache.nxp.com/files/32bit/doc/ref_manual/IMX7DRM.pdf

there is no option to boot directly M4, so some code should be run from

A7 to load code to M4 and run it. One can check AN5317

Loading Code on Cortex-M4 from Linux for the i.MX 6SoloX and i.MX 7Dual/7Solo Application Processors

cache.nxp.com/files/soft_dev_tools/doc/app_note/AN5317.pdf

In general one can develop custom code for such purpose and

run M4 from Uboot in similar way as in sect.4.7.6 Running the ARM

Cortex-M4 image attached Linux Guide.

Best regards
igor
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Re: IMx7 Solo M4 boot

erikfriedel — Mon, 20 Aug 2018 06:51:27 GMT

I have a few problems with loading the code for the M4 from Linux. how exactly can you move the code to a specific address in memory? This part isn't mentioned in the AN5317.pdf

Setting single bits is possible with devmem, so the rest of the procedure is fine.

Do I need to write a script or is there a super convenient command for this purpose I am unable to find?

"Load the code for the Cortex-M4 processor into the TCM_L memory." - But how?

Erik