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Priviledged instruction set #25

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BrunoLevy opened this issue Jan 12, 2021 · 1 comment

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BrunoLevy commented Jan 12, 2021

fully implement instructions to manipulate the CSRs
two levels of privilege, ECALL and EBREAK, implement FEMTOS syscalls, SDCard file access and terminal.
three levels of privilege
MMU
run Linux
Links:
https://github.com/BrunoLevy/learn-fpga/blob/master/FemtoRV/TUTORIALS/priviledged.md

BrunoLevy added the enhancement label

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BrunoLevy commented Jan 17, 2021

Let us start with a very minimalistic implementation, that would fit in the miniRV32 as an option, with:

fixed exception handler address
only mepc
Then implement RV32M and RV32C with it.

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