CODEWITHSUNDEEP
riscv
geo przm
geo przm

Reputation: 41

RISC-V ISA Input and Output operations

I didn't see anything in ISA 2.0 that talks about IO. Is RISC-V IO memory mapped ? Are there any specification on how IO is suppose to be done ? Do I get to define my own method ? TIA.

Upvotes: 4

Views: 1694

Answers (1)

user2548418
user2548418

Reputation: 1571

Yes, it is memory mapped. The exact specifications are still being worked out, as there are attempts to factor things as cleanly as possible to promote reuse. It was even the topic of long conversation on the riscv-hw mailing list. Virtio is the direction things seem to be heading.

If you define your own now, you of course run the risk of needing to port things when it is standardized later on.

Upvotes: 1

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