1.6 PIO

MmProbeAndLockPages 

Probes the pages specified in an MDL for a particular kind of access, makes the pages resident, and locks them in memory; returns the MDL updated with corresponding physical addresses.

MmGetSystemAddressForMdl 

Returns a system-space virtual address that maps the physical pages described by a given MDL for drivers whose devices must use PIO.

KeFlushIoBuffers 

Flushes the memory region described by a given MDL from all processors’ caches into memory.

MmUnlockPages 

Unlocks the previously probed and locked pages specified in an MDL.

MmMapIoSpace 

Maps a physical address range to a cached or noncached virtual address range in nonpaged system space.

MmUnmapIoSpace 

Unmaps a virtual address range from a physical address range.