iokit/Kernel/IOMemoryDescriptor.cpp

156     addr64_t    fMappedBase;
1205 		remap = ((dataP->fMappedBase + _length) > (1ULL << dataP->fDMAMapNumAddressBits));
1213 	    if (remap || !dataP->fMappedBase)
1215 //		if (dataP->fMappedBase) OSReportWithBacktrace("kIOMDDMAMap whole %d remap %d params %d\n", whole, remap, params);
1217 		if ((kIOReturnSuccess == err) && whole && !dataP->fMappedBase)
1219 		    dataP->fMappedBase = data->fAlloc;
1225 	    	data->fAlloc = dataP->fMappedBase;
1313 	&& (!_memoryEntries || !getDataP(_memoryEntries)->fMappedBase))
1314 //	&& (_memoryEntries && !getDataP(_memoryEntries)->fMappedBase))
1326 	    err = md->dmaMap(dataP->fMapper, &mapSpec, 0, _length, &dataP->fMappedBase, NULL);
1364 		&& (dataP = getDataP(_memoryEntries)) && dataP->fMappedBase)
1366 	    address = dataP->fMappedBase + offset;
1401 		&& (dataP = getDataP(_memoryEntries)) && dataP->fMappedBase)
1403 	    address = dataP->fMappedBase + offset;
1452 	if (mapped && dataP->fMappedBase) {
1454 	    address = trunc_page_64(dataP->fMappedBase) + ptoa_64(ioplInfo.fMappedPage) + offset;
2076     dataP->fMappedBase = 0;
2297     dataP->fMappedBase           = 0;
2520 	    if (dataP->fMappedBase) {
2521 		dataP->fMapper->iovmFree(atop_64(dataP->fMappedBase), _pages);
2522 	        dataP->fMappedBase = 0;