The MmUnmapIoSpace routine unmaps a specified range of physical addresses previously mapped by MmMapIoSpace.
void MmUnmapIoSpace( PVOID BaseAddress, SIZE_T NumberOfBytes );
Pointer to the base virtual address to which the physical pages were mapped.
Specifies the number of bytes that were mapped.
If a driver calls MmMapIoSpace during device start-up, it must call MmUnmapIoSpace when it receives a PnP stop-device or remove-device IRP for the same device object.
|Minimum supported client||Available starting with Windows 2000.|
|Header||wdm.h (include Wdm.h, Ntddk.h, Ntifs.h)|