Specifies the bit flags describing the target's memory in which the data resides. If no flags are present, the data is considered to be in virtual memory. One of the following flags may be present:
EXT_TDF_PHYSICAL_DEFAULT The typed data is in physical memory, and this physical memory uses the default memory caching.
EXT_TDF_PHYSICAL_CACHED The typed data is in physical memory, and this physical memory is cached.
EXT_TDF_PHYSICAL_UNCACHED The typed data is in physical memory, and this physical memory is uncached.
EXT_TDF_PHYSICAL_WRITE_COMBINED The typed data is in physical memory, and this physical memory is write-combined.