ZYNQ 7000 using FreeRTOS with SMP architecture

[wyatt_ogden]

Hey everyone,

Here's what I'm trying to accomplish... I want to run one instance of FreeRTOS on both of the ARM cores. I can't seem to find anything about this. Yet I have found another solution, which is using AMP with two separate instances on both cores. I'm trying to avoid doing this.

I can't seem to find any answers online. Although I have found other RTOS's capable of SMP on the ZYNQ boards.

So is this possible? If so, what resources can I take a look at to help guide me? What is the amount of effort required to do this? Is it better to just workaround using AMP as a solution? Also, if not FreeRTOS, what RTOS's will allow me to do this easily?

Thanks and Cheers!

[sushmita25]

Hey,

I am trying to do the same.

As of now I am trying for SMP on Baremetal. But cpu1 is not waking up.

I have used Software Generated Interrupt to wake up CPU1. But cpu1 is not wakening up.

Is there I am missing something. I am doing it on Zedboard.

Do you have any example of SMP

[nisohack]

I would also like to know how to use SMP instead of AMP. I do not want to download a separate application for the other CPU. I want to download one application for both CPUs and have both CPUs start at the same entry point I specify in the linker file. Anyone know how to do this?

[ericv]

@nisohack 

FreeRTOS was designed / implemented for single core and getting it to operate as a SMP RTOS involves a fair amount of effort. With a bit of search, you'll find a few instances where it's reported as done successfuly and may consider to contact them. Fundamentally, a SMP RTOS needs to be designed / implemented from scratch as a multi-core RTOS and that alike a 180 degrees shift from the way a single core RTOS is implemented.

I am highly biased because our product is a SMP RTOS - I agree with you, a single binary makes more sense . You should be able to get what you want from our freeware page. 

https://code-time.com/smp_free.html

The uAbassi freeware version may have enough features to fulfill your needs.

Same for SMP bare-metal (a different web page) - link with the library and you get SMP bare-metal.

[nisohack]

Thanks @ericv. I actually figured it out... turns out the RTOS I'm using (not FreeRTOS) does it, just wasn't familiar enough with the tools.