1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef _SPARC_IOCTL_H 3*4882a593Smuzhiyun #define _SPARC_IOCTL_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * Our DIR and SIZE overlap in order to simulteneously provide 7*4882a593Smuzhiyun * a non-zero _IOC_NONE (for binary compatibility) and 8*4882a593Smuzhiyun * 14 bits of size as on i386. Here's the layout: 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * 0xE0000000 DIR 11*4882a593Smuzhiyun * 0x80000000 DIR = WRITE 12*4882a593Smuzhiyun * 0x40000000 DIR = READ 13*4882a593Smuzhiyun * 0x20000000 DIR = NONE 14*4882a593Smuzhiyun * 0x3FFF0000 SIZE (overlaps NONE bit) 15*4882a593Smuzhiyun * 0x0000FF00 TYPE 16*4882a593Smuzhiyun * 0x000000FF NR (CMD) 17*4882a593Smuzhiyun */ 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun #define _IOC_NRBITS 8 20*4882a593Smuzhiyun #define _IOC_TYPEBITS 8 21*4882a593Smuzhiyun #define _IOC_SIZEBITS 13 /* Actually 14, see below. */ 22*4882a593Smuzhiyun #define _IOC_DIRBITS 3 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) 25*4882a593Smuzhiyun #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) 26*4882a593Smuzhiyun #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1) 27*4882a593Smuzhiyun #define _IOC_XSIZEMASK ((1 << (_IOC_SIZEBITS+1))-1) 28*4882a593Smuzhiyun #define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1) 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun #define _IOC_NRSHIFT 0 31*4882a593Smuzhiyun #define _IOC_TYPESHIFT (_IOC_NRSHIFT + _IOC_NRBITS) 32*4882a593Smuzhiyun #define _IOC_SIZESHIFT (_IOC_TYPESHIFT + _IOC_TYPEBITS) 33*4882a593Smuzhiyun #define _IOC_DIRSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS) 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #define _IOC_NONE 1U 36*4882a593Smuzhiyun #define _IOC_READ 2U 37*4882a593Smuzhiyun #define _IOC_WRITE 4U 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun #define _IOC(dir,type,nr,size) \ 40*4882a593Smuzhiyun (((dir) << _IOC_DIRSHIFT) | \ 41*4882a593Smuzhiyun ((type) << _IOC_TYPESHIFT) | \ 42*4882a593Smuzhiyun ((nr) << _IOC_NRSHIFT) | \ 43*4882a593Smuzhiyun ((size) << _IOC_SIZESHIFT)) 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun #define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0) 46*4882a593Smuzhiyun #define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size)) 47*4882a593Smuzhiyun #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size)) 48*4882a593Smuzhiyun #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size)) 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun /* Used to decode ioctl numbers in drivers despite the leading underscore... */ 51*4882a593Smuzhiyun #define _IOC_DIR(nr) \ 52*4882a593Smuzhiyun ( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)? \ 53*4882a593Smuzhiyun (((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)): \ 54*4882a593Smuzhiyun (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) ) 55*4882a593Smuzhiyun #define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK) 56*4882a593Smuzhiyun #define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK) 57*4882a593Smuzhiyun #define _IOC_SIZE(nr) \ 58*4882a593Smuzhiyun ((((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) == 0)? \ 59*4882a593Smuzhiyun 0: (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK)) 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun /* ...and for the PCMCIA and sound. */ 62*4882a593Smuzhiyun #define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT) 63*4882a593Smuzhiyun #define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT) 64*4882a593Smuzhiyun #define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT) 65*4882a593Smuzhiyun #define IOCSIZE_MASK (_IOC_XSIZEMASK << _IOC_SIZESHIFT) 66*4882a593Smuzhiyun #define IOCSIZE_SHIFT (_IOC_SIZESHIFT) 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun #endif /* !(_SPARC_IOCTL_H) */ 69