PRU TI C compiler documentation and control register access

Hello

I'm developing an application for use on the OMAP L138's PRU and am having some trouble finding the correct documentation.

I'm using  CCS Version: 6.1.1.00022 and have installed the PRU Compiler Tools Version 2.1.2.

I'm using the TI PRU compiler so I can write my application in C but I'm having a hard time finding documentation on compiler support for the intrinsic function - such as __delay_cycles. I found that one by simply googling online, but it would be nice to have a document that lays everything out.

Specifically, I'm looking to access the Cycle Count Register and am wondering if there is a macro defined somewhere that I can use, or if I have to access it via pointer; eg 

volatile uint32_t* cycleCount = (volatile uint32_t*)(SOME_ADDRESS);

I have read through the PRU Wiki but don't see much information about the C compiler.

Thanks!