PVOID MmAllocateNonCachedMemory( IN SIZE_T NumberOfBytes ); Routine Description: This function allocates a range of noncached memory in the non-paged portion of the system address space. This routine is designed to be used by a driver's initialization routine to allocate a noncached block of virtual memory for various device specific buffers. Arguments: NumberOfBytes - Supplies the number of bytes to allocate. Return Value: NON-NULL - Returns a pointer (virtual address in the nonpaged portion of the system) to the allocated physically contiguous memory. NULL - The specified request could not be satisfied. Environment: Kernel mode, IRQL of APC_LEVEL or below.