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Purism in their Librem 5 separated that memory training into a separate (proprietary) chip and achieved blob-free software running on the CPU: https://puri.sm/posts/librem5-solving-the-first-fsf-ryf-hurd....


Which is meaningless philosophical exercise, as you still have the blob running anyway. (and now you cannot update it because it is in write protected memory, uh)


AFAIK it's not running. At least it's not running on the CPU.


It's not running on main core either way. It's blob which is loaded into DDR controller, and for some reason FSF thinks it is wrong to memcpy that blob using main cpu, but it is fine if you memcpy it using secondary core.




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