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rust-embedded / riscv

Low level access to RISC-V processors
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riscv: add `mcounteren` in-memory update functions #217

Closed rmsyn closed 3 months ago

rmsyn commented 3 months ago

Adds functions for updating the in-memory Mcounteren structure without touching the CSR.

Allows manipulating all bitfields in-memory, and writing the entire value back to the CSR at once.

rmsyn commented 3 months ago

It would be interesting if we are able to update all the registers using brand new macros that follow this fashion.

I can work on something. Would probably want at least two versions of the macro, read_only_csr and read_write_csr (or whatever naming scheme).

Might also be good to export the macros for downstream users with custom CSRs on their SoC.