Mantle wont run without a hardware driver to support it. Are you saying consoles ship with Mantle drivers that MS and Sony wrote? I dont think so. Its time you let go of Mantle and consoles, its just not happening.
PhysX can run on CPU only, meaning no driver support needed.
So, you didnt find the proclaimed driver I assume. Time to leave it there then.
CPU physX still requires software to run - without that software, which has an independent installer and creates the following structure, CPU physX can't run.
PhysX needs to run in the consoles. It does run in the consoles despite Microsoft DX not supporting it. It has to go inside the console somehow. That somehow is via the game engine.
Again, AMD doesn't need to have mantle in the consoles because the consoles are already optimized for AMD hardware.
But if the developers wanted, they could strap the Mantle SDK to their games engine just like they do with PhysX SDK.
Mantle is about porting what allows direct access to the GCN hardware in the consoles to the PC.
The driver that exists in the consoles already work with AMD hardware - it is a GCN driver.
Normally in the PC one couldn't do that because the games are written for DX that has to interact with AMD driver/hardware, Intel driver/hardware and NVIDIA driver/hardware.
But console games are now written and optimized for AMD hardware so that code that interacts directly with the GCN driver and APi in the consoles already exist.