On Wed, Jul 27, 2022 at 10:24 PM Ben Dooks <q...@ben.fluff.org> wrote: > > Is anyone working on adding a sifive-u74 core to the list of supported > CPU types? I was looking at full emulation of the Unmatched but at the > moment the best we have is sifive-u54 and I think that misses at least > two CSRs the sifive-u74 has. > > Does anyone have plans to add the sifive-u74, and if not, would a plan > to add gradual support for it like adding CSRs 0x7c1 and 0x7c2 so we > can run an Unmatched U-boot SPL against it.
Adding 0x7c1/7c2 would be a vendor-specific CSR approach? > > If not, is there a definitive U54->U74 set of public differnces around > we could use to start from? I'd like to be able to run a full Unmatched > image using qemu at some point to add to the current real-board testing > we're doing. > > (I have a basic addition of the type and the two CSRs as a couple of > patches if that would help as a start) > I am not aware of anyone doing U74 modeling in QEMU, but SiFive folks (+Frank) may have one downstream as I see they posted several bug fixes in the existing U54 model. Regards, Bin
