GPIO initialization

Hello TI Experts,

I want manipulate GPIO (using HAwkboard), following the basics steps:

1. Perform the neccesary device pin multiplexing setup
2. Program de power sleep controller
3. Program he direction pin

But I can't found detail information about "System Configuration Module" especially about the registers PINMUX0 - PINMUX19.

"OMAP-L1x Processor Peripherals Overview" only has general information and omapl138 data sheet only indicate the register address.

Are correct the steps? Where can I find more information?

Thanks.