iokit/Kernel/IOMemoryDescriptor.cpp

195     memDesc = ref->dp.memory;
559 	// Auto-prepare if this is a kernel memory descriptor as very few
560 	// clients bother to prepare() kernel memory.
615 	// Only accept persistent memory descriptors with valid dataP data.
666          * An existing memory descriptor is being retargeted to point to
781 	// Initialize the memory descriptor
870         // Auto-prepare memory at creation time.
906 	reserved->dp.memory = 0;
1349 	// Physical address based memory descriptor
1386 	// Physical address based memory descriptor
1469 	// Check for direct device non-paged memory
1532     // support the unwired memory case in IOGeneralMemoryDescriptor, and hibernate_write_image() cannot use
1533     // map()->getVirtualAddress() to obtain the kernel pointer, since it must prevent the memory allocation
1589 	// dmaCommandOperation() does not distinguish between "mapped" and "unmapped" physical memory, even
2213 	    // that freed memory before the descriptor pointing at it
2425 	// Check for direct device non-paged memory
2440  * Prepare the memory for an I/O transfer.  This involves paging in
2441  * the memory, if necessary, and wiring it down for the duration of
2443  * the memory after the I/O transfer finishes.  This method needn't
2444  * called for non-pageable memory.
2483  * Complete processing of the memory after an I/O transfer finishes.
2486  * before and after an I/O transfer involving pageable memory.
2724 	    reserved->dp.memory      = this;
2907             // set memory entry cache
3466 // of a memory descriptors _mappings set.  This means that we
4040     // Copy the volatile data so we don't have to allocate memory