ARM Cortex directories naming

[RICCIARDI-Adrien]

Hi,

In the Trampoline machines directory, there is the cortex directory that seems to be dedicated to microcontroller Cortex-M versions, then there is the cortex-a directory for the Cortex-A7, and there is also the arm directory for the pre-Cortex architectures, like ARM9.

Maybe it would make more sense to rename the cortex directory to cortex-m, so it is easier understand ?

A second question : if someone wants to add a Cortex-R port, are you OK to create a dedicated cortex-r directory or do you prefer to share an existing directory ?

[jlbirccyn]

Hello Adrien,

cortex could be rename cortex-m provided templates are changed accordingly.

For Cortex-R (that I know little about) It depends if the sc_handler and interrupt routine code are (or would be) different or not. I see that the -R supports both ARM and thumb, and I assume cross-calls. Therefore, it depends on whether the sc_handler is written in thumb or ARM. To be discussed.

[RICCIARDI-Adrien]

Hello Jean-Luc,

Thanks for the quick reply.

What is the simple machine ? It seems to provide the same Cortex-M architectures than the current cortex directory ?

[jlbirccyn]

simple was used in a lab where students implemented a simple context switch (if you look, the sc_handler is missing). As of last year, the lab has been ported to the Raspberry Pi Pico and simple is no longer used, nor will it be in the future. It will therefore be removed. simple has not been put on a branch to make it easier for students who are not very familiar with Git to set up the lab.

[RICCIARDI-Adrien]

OK, do you want to remove the simple machine and examples yourself or do you prefer a pull request ? And same question for the cortex directories, do you want to rename them or do you prefer a pull request ?

[RICCIARDI-Adrien]

I have now the answer for the simple architecture ! Are the following directories also part of the simple architecture ?

• examples/simple/
• goil/templates/linker/gnu_ld/simple/
• goil/templates/config/simple/

[jlbirccyn]

Yes,

I just pushed the removing of these directories

For the name change of cortex to cortex-m, I welcome a pull-request.

[RICCIARDI-Adrien]

Got it for the cortex-m.

Do you want to keep the examples/simple/ directory ?

[jlbirccyn]

I just deleted it.

[RICCIARDI-Adrien]

The pull request renaming cortex into cortex-m is here : https://github.com/TrampolineRTOS/trampoline/pull/145.

[RICCIARDI-Adrien]

The pull request renaming cortex-a into cortex-a-r is here : https://github.com/TrampolineRTOS/trampoline/pull/147.