typedef struct _DUMP_INITIALIZATION_CONTEXT
{
     ULONG Length;
     ULONG Reserved;
     PVOID MemoryBlock;
     VOID * CommonBuffer[2];
     LARGE_INTEGER PhysicalAddress[2];
     PVOID StallRoutine;
     UCHAR * OpenRoutine;
     LONG * WriteRoutine;
     PVOID FinishRoutine;
     _ADAPTER_OBJECT * AdapterObject;
     PVOID MappedRegisterBase;
     PVOID PortConfiguration;
     UCHAR CrashDump;
     ULONG MaximumTransferSize;
     ULONG CommonBufferSize;
     PVOID TargetAddress;
     LONG * WritePendingRoutine;
     ULONG PartitionStyle;
     ULONG DiskInfo;
} DUMP_INITIALIZATION_CONTEXT, *PDUMP_INITIALIZATION_CONTEXT;

Windows Vista Kernel Structures