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rust-embedded / aarch64-cpu

Low level access to processors using the AArch64 execution state.
Apache License 2.0
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Runtime crate #13

Closed rmsyn closed 3 weeks ago

rmsyn commented 1 year ago

Similar to cortex-m-rt, I'd like to help develop a runtime library for aarch64-cpus.

I've looked into some of the differences in how vector tables are setup, seems some people just use trampolines to actual interrupt/exception handlers. Not sure how to generalize that in a safe rust macro.

Is a runtime crate currently being worked on, and/or talked about?

berkus commented 1 month ago

@rmsyn that is probably a task for a crate like aarch64-rt, this crate merely gives access to various ARM registers.

rmsyn commented 1 month ago

Right, we discussed working on something like aarch64-rt in the Matrix room, but I've since had focus shifted to other work.

Would you be interested in using/working on an aarch64-rt crate?

If I remember correctly, one of the main blockers was the lack of consistency on aarch64 SoCs (interrupts, bring-up, peripherals, etc.), and a lack of interest/time from knowledgable people.

berkus commented 1 month ago

@rmsyn aarch64-rt crate would be of little use for me, as you said the init sequences are usually specific, the interrupt vector tables I set up via a simple linker script, so there isn't much reusable pieces to land in an RT crate.

berkus commented 3 weeks ago

Hi, @rmsyn, I'm closing this one, if the rt crate idea is still viable I recommend we start a separate repository for it.