oil pump

I have 2008 Lamborghini Gallardo Spyder. I want to know what drives the shaft that drives the oil pump. I lifted the car, noticing a rough sound from the engine (like the pistons were grinding) and a oil light :(, I saw that the shaft was not moving, so no oil being circulated. I messed with it...

Rather technical inquiry as to how the Gallardo ECU pulls the engine oil can up on the instrument cluster. It currently is coming on at idle, after the car is up to operating temperature. Car is a 2007, motor was recently rebuilt. Firstly, what are everyone's oil pressure readings with the...