Add RISC-V performance CSR support

AdaCore / Ada_Drivers_Library

Ada source code and complete sample GNAT projects for selected bare-board platforms supported by GNAT.

BSD 3-Clause "New" or "Revised" License

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Add RISC-V performance CSR support #363

Closed Fabien-Chouteau closed 3 years ago

Fabien-Chouteau commented 3 years ago

@rod-chapman le me know if that works on your board.

rod-chapman commented 3 years ago

See comments above.

rod-chapman commented 3 years ago

OK... I have re-built my test program with the head of this branch, and all seems well. I have checked the generated code for RISCV.CSR.Mcycle.Read by hand at -O0, O1, O2 and O3 and it looks good.

I am now happy to merge this if you are...