In many of the posts, there are references to the OMAP-L1x, AM1x, and C674x System Reference Guides as well as individual User's Guides for Peripherals that are shared across the three families of devices.
TI has consolidated these resources (System Reference Guides, EDMA User's Guide, and various Peripheral User Guides) into a unified Technical Reference Manual for each of the above devices. The Technical Reference Manual is now available as a single download below the Datasheet download for each of the devices.