#define FILE_DEVICE_KRNLDRVR 0x80ff

#define NT_DEVICE_NAME	    L"\\Device\\IRQGEN0"
#define DOS_DEVICE_NAME     L"\\DosDevices\\IRQGEN"
#define ERROR_MESSAGE	    L"IRQGen: Error Message Test"

#define IOCTL_IRQGEN_INIT_GEN_DRIVER	CTL_CODE(FILE_DEVICE_KRNLDRVR, 0x801, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_IRQGEN_DETECT_IRQ			CTL_CODE(FILE_DEVICE_KRNLDRVR, 0x802, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_IRQGEN_SEND_EOI			CTL_CODE(FILE_DEVICE_KRNLDRVR, 0x803, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_IRQGEN_ABORT				CTL_CODE(FILE_DEVICE_KRNLDRVR, 0x804, METHOD_BUFFERED, FILE_ANY_ACCESS)

#define WRITE_TO_CLEAR		0
#define READ_TO_CLEAR		1

typedef struct _IRQGEN_DEVICE_EXTENSION {
    PDEVICE_OBJECT DeviceObject;
    PKINTERRUPT	InterruptObject;
	BOOLEAN InterruptOccurred;
	BOOLEAN InterruptRequested;
	BOOLEAN InterruptConnected;
	UCHAR IRQ;
	PIRP PendingIrp;
	BOOLEAN HasPendingIrp;
	ULONG BaseAddress;
	UCHAR Operation;
	USHORT ClearOffset;

} IRQGEN_DEVICE_EXTENSION, *PIRQGEN_DEVICE_EXTENSION;

#pragma pack(push)
#pragma pack(2)
typedef struct _IRQGEN_INIT_DATA {
	unsigned long BaseAddress;
	unsigned short IRQ;
	short BusType;
	unsigned short BusNumber;
	unsigned short ClearOffset;
	unsigned short Operation;
	unsigned long Reserved1;
	unsigned long Reserved2;
} IRQGEN_INIT_DATA, *PIRQGEN_INIT_DATA;
#pragma pack(pop)

BOOLEAN
IRQGenInterruptServiceRoutine(
    IN PKINTERRUPT Interrupt,
    IN OUT PVOID Context
    );

VOID
IRQGenDpcForIsrRoutine(
    IN PKDPC Dpc,
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp,
    IN PVOID Context
    );

NTSTATUS
IRQGenOpenClose(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp
    );

VOID
IRQGenUnload(
    IN PDRIVER_OBJECT DriverObject
    );

NTSTATUS
IRQGenDeviceControl(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp
    );

VOID
IRQGenCancelIrp(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp
    );