I was reading this link. I am wondering to know how the WiFi could talk to CPU directly (and vice versa). I searched everywhere but no sign of such communication. AFAIK it's OS's job to handle this communication via WiFi driver, but is it a complete different way?
When you put both CPU and WiFi circuits on a single SoC, it's hard to understand how do they talk to each other without any OSes. Or there is some OS running on SoC?
One other question: Is it possible to implement TCP/IP stack with hardware? I mean some kind of direct access (or access through a hardware device) between CPU and WiFi.