/* * This is the structure for Skeleton device info */typedef struct {    PVOID FrameBase;		/* Frame buffer address in system memory */    ULONG FrameMemType;		/* Address space: 0x0 = mem, 0x1 = I/O */    PKINTERRUPT KIntrObj;	/* Interrrupt object from IoConnectInterrupt */    ULONG KIntrVector;		/* Mapped system interrupt vector */    KIRQL KIrql;    KAFFINITY KIntrAffinity;	/* The processor set this interrupt affects */    FAST_MUTEX IrpMutex;	/* Ensure 1 dispatch entry at a time */    KSPIN_LOCK DeviceSpinLock;	/*  */    ULONG BusId;    ULONG SlotId;    PHYSICAL_ADDRESS MemStart;    ULONG MemLength;    ULONG IntrLevel;    ULONG IntrVector;    ULONG IntrAffinity;    /* StartIo subroutine fields.  Used by QueryVideo() */    KDPC StartIoDpc;		/* Used by the query video routine */    KTIMER StartIoTimer;	/* Timer used in StartIo subroutine */    ULONG StartIoState;		/* Current state of StartIo subroutine */    PVOID StartIoBuffer;	/* Current buffer we are using */    /* Some DMA related fields */    PADAPTER_OBJECT AdaptorObj;	/* Pointer to DMA adaptor object */    ULONG DmaMapRegisters;	/* Number of DMA map registers */    PVOID MapRegisterBase;	/* DMA map register base */    PVOID VirtualAddress;	/* Virtual address of MDL for DMA transfer */    KTIMER DeviceCheckTimer;	/* Timer to check that DMA hasn't failed */    BOOLEAN TimerStarted;	/* Has the timer been started */    KDPC TimerDpc;		/* The DPC to run on timer trigger */    BOOLEAN TransferDone;	/* When the timeout occurs, find out if				 * the tranfer was already done */    PVOID IrpSystemBuffer;	/* System buffer for the current IRP */    ULONG IrpBufLen;		/* Buffer length for the current IRP */    NTSTATUS IrpStatus;		/* The status of the transfer */    ULONG IrpBytesTransferred;	/* Number of bytes that were transfered */    CCHAR OperationType;        /* current command (ie IRP_MJ_READ) */    ULONG TotalTransferLength;	/* length of current transfer */    BOOLEAN RequestDpc;		/* Set this if the routine wishes to  */    BOOLEAN DpcRequested;    ULONG RestoreChannel;	/* Channel was in use and needs restoring */    ULONG syncParam1;		/* Parameters for the synch routine */    ULONG syncParam2;    ULONG syncParam3;    union {			/* Return value if needed */	ULONG ULong;	int Int;	long Long;    } syncResult;} SKELETON_DEVICE, *PSKELETON_DEVICE;#define offsetof(type, field) ((ULONG) ((char *) &((type *) 0)->field))#ifdef LITTLE_ENDIAN#  define LITTLE_ENDIAN_16(x) (x)#  define LITTLE_ENDIAN_32(x) (x)static __inline unsigned short BIG_ENDIAN_16(unsigned short x){    return (((x & 0x00FF) << 8) + ((x & 0xFF00) >> 8));}static __inline unsigned int BIG_ENDIAN_32(unsigned int x){    return (((x & 0x000000FF) << 24) + ((x & 0x0000FF00) << 8) +	    ((x & 0x00FF0000) >> 8) + ((x & 0xFF000000) >> 24));}#else#  define BIG_ENDIAN_16(x) (x)#  define BIG_ENDIAN_32(x) (x)static __inline unsigned short LITTLE_ENDIAN_16(unsigned short n){   return (((n & 0x00FF) << 8) + ((n & 0xFF00) >> 8));}static __inline unsigned int LITTLE_ENDIAN_32(unsigned int n){    return (((n & 0x000000FF) << 24) + ((n & 0x0000FF00) << 8) +	    ((n & 0x00FF0000) >> 8) + ((n & 0xFF000000) >> 24));}#endif