GPIO-control via Linux mmap-interface?

WereCatf New Member Posts: 201
The Linux GPIO sysfs-interface is excruciatingly slow and limited, only useable for the most basic stuff, and even then just barely. On ARM-devices I use the Linux mmap-interface to directly access the various GPIO-registers to set them up as I like and to toggle them, reaching several tens of times faster I/O-speeds than one could ever achieve via the sysfs-interface. Alas, how does one operate the registers on Intel platform? I've never done anything like that on an Intel-device and it's difficult to even find any documentation on the registers, let alone how to manipulate them.