//The below defines are from Linux kernel ioctl.h.

#define _IOC_NRBITS	8
#define _IOC_TYPEBITS	8
#define _IOC_SIZEBITS	14
#define _IOC_DIRBITS	2

#define _IOC_NRMASK	((1 << _IOC_NRBITS)-1)
#define _IOC_TYPEMASK	((1 << _IOC_TYPEBITS)-1)
#define _IOC_SIZEMASK	((1 << _IOC_SIZEBITS)-1)
#define _IOC_DIRMASK	((1 << _IOC_DIRBITS)-1)

#define _IOC_NRSHIFT	0
#define _IOC_TYPESHIFT	(_IOC_NRSHIFT+_IOC_NRBITS)
#define _IOC_SIZESHIFT	(_IOC_TYPESHIFT+_IOC_TYPEBITS)
#define _IOC_DIRSHIFT	(_IOC_SIZESHIFT+_IOC_SIZEBITS)

/*
 * Direction bits.
 */
#define _IOC_NONE	0U
#define _IOC_WRITE	1U
#define _IOC_READ	2U

#define _IOC(dir,type,nr,size) \
	(((dir)  << _IOC_DIRSHIFT) | \
	 ((type) << _IOC_TYPESHIFT) | \
	 ((nr)   << _IOC_NRSHIFT) | \
	 ((size) << _IOC_SIZESHIFT))

/* used to decode ioctl numbers.. */

#define _IOC_SIZE(nr)		(((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)

typedef enum {
	NVSERVTYPE_Default = -1,
	NVSERVTYPE_Application = 0,
	NVSERVTYPE_Applet = 1,
	NVSERVTYPE_Sysmodule = 2,
	NVSERVTYPE_T = 3,
} nvServiceType;

Result nvInitialize(nvServiceType servicetype, size_t sharedmem_size);
void nvExit(void);

Result nvOpen(u32 *fd, const char *devicepath);
Result nvIoctl(u32 fd, u32 request, void* argp);
Result nvClose(u32 fd);