iokit/Kernel/IOMemoryDescriptor.cpp

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146     uint32_t fIOMDOffset;	    // The offset of this iopl in descriptor
147     ppnum_t fMappedPage;	    // Page number of first page in this iopl
148     unsigned int fPageOffset;	    // Offset within first page of iopl
345  * Create a new IOMemoryDescriptor. The buffer is made up of several
399 IOMemoryDescriptor::withSubRange(IOMemoryDescriptor *	of,
404     return (IOSubMemoryDescriptor::withSubRange(of, offset, length, direction | kIOMemoryThreadSafe));
575  *  IOMemoryDescriptor. The buffer is made up of several virtual address ranges,
844 	// Find starting address within the vector of ranges
969  * Get the direction of the transfer.
983  * Get the length of the transfer (over all ranges).
1479 	// Compute the starting address of this segment
1487 	// length is currently set to the length of the remainider of the iopl.
1488 	// We need to check that the remainder of the iopl is contiguous.
1534     // due to IOMemoryMap, so _kIOMemorySourceSegment is a necessary evil until all of this gets cleaned up
1542 	// Find starting address within the vector of ranges
1660 	panic("getPhysicalSegment() out of 32b range 0x%qx, len 0x%lx, class %s",
2116     // Iterate over the vector of virtual ranges
2128 	// Get the startPage address and length of vec[range]
2441  * the memory, if necessary, and wiring it down for the duration of
2442  * the transfer.  The complete() method completes the processing of
2483  * Complete processing of the memory after an I/O transfer finishes.
2632                 // Find starting address within the vector of ranges
3219 	// in the middle of the loop only map whole pages
3264 	// of the mappings created above for kernel mappings, since
3466 // of a memory descriptors _mappings set.  This means that we
3467 // always have 2 references on a mapping.  When either of these mappings