3 ms·
2015 and July 2019, though the HiFive Unleashed shown in late 2017 and shipped in February or March 2018 ended up being compatible with the privileged ISA ratif
by brucehoult 4y ago
2015 and July 2019, though the HiFive Unleashed shown in late 2017 and shipped in February or March 2018 ended up being compatible with the privileged ISA ratified in 2019.
> How many CPUs with a home grown memory protection designs were sold between those two dates?
Zero that I'm aware of. Want to inform us?
The Canaan Kendryte K210 dual core 400 MHz 64 bit microcontroller shipped with an incompatible MMU, but it wasn't home grown — it's unmodified Berkeley Rocket implementing the current version (Priv 1.9.1) as at the time Canaan took the core snapshot for their SoC.
If that chip was a serious Linux target then priv 1.9.1 support could be put BACK in the Linux kernel (it wasn't upstreamed but it existed and was published). But with only 8 MB of non-expandable on chip SRAM there is no point anyway.