PowerQUICC ProcessorsのトピックRe: What can cause a code running on cpu 0 does not on cpu 1 ?

What can cause a code running on cpu 0 does not on cpu 1 ?

yasetoliva — Thu, 18 Jan 2018 16:20:41 GMT

The code is the FreeRTOS that I've built/run on the cpu0 of a twr-ls1021a board. I'm able to copy the code into ram and launch it from u-boot prompt. It works fine.

Then I run another code with cpu 0 to wake up the cpu 1 and put it running the FreeRTOS code. I can trace the execution of cpu 1 until the moment where the first task is to be started. Then I don't know what's happening but the cpu 1 doesn't jump to the right address.

What can cause this bug? It's possible that it comes from the mmu, caches, etc enabled by u-boot on cpu 0 but NOT enabled on cpu 1?

Regards,

Yaset

Re: What can cause a code running on cpu 0 does not on cpu 1 ?

Pavel — Fri, 26 Jan 2018 09:33:22 GMT

Do you use an SMP version of FreeRTOS? See the following page:

https://sourceforge.net/p/freertos/discussion/382005/thread/b74e2952/

Re: What can cause a code running on cpu 0 does not on cpu 1 ?

yasetoliva — Mon, 29 Jan 2018 08:31:37 GMT

Thanks Pavel.

The problem was the timer that generate the ticks. We think, the timer is initialized during u-boot which is not executed by the cpu1. We have extracted the initialization code from the u-boot (u-boot-fslc/arch/arm/cpu/armv7/ls102xa/cpu.c) and included it in our code and it works now.

Thanks a lot for your answer.

Regards,

Yaset