| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| #ifndef _SPARC_IOCTL_H |
| #define _SPARC_IOCTL_H |
| |
| /* |
| * Our DIR and SIZE overlap in order to simulteneously provide |
| * a non-zero _IOC_NONE (for binary compatibility) and |
| * 14 bits of size as on i386. Here's the layout: |
| * |
| * 0xE0000000 DIR |
| * 0x80000000 DIR = WRITE |
| * 0x40000000 DIR = READ |
| * 0x20000000 DIR = NONE |
| * 0x3FFF0000 SIZE (overlaps NONE bit) |
| * 0x0000FF00 TYPE |
| * 0x000000FF NR (CMD) |
| */ |
| |
| #define _IOC_NRBITS 8 |
| #define _IOC_TYPEBITS 8 |
| #define _IOC_SIZEBITS 13 /* Actually 14, see below. */ |
| #define _IOC_DIRBITS 3 |
| |
| #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) |
| #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) |
| #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1) |
| #define _IOC_XSIZEMASK ((1 << (_IOC_SIZEBITS+1))-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) |
| |
| #define _IOC_NONE 1U |
| #define _IOC_READ 2U |
| #define _IOC_WRITE 4U |
| |
| #define _IOC(dir,type,nr,size) \ |
| (((dir) << _IOC_DIRSHIFT) | \ |
| ((type) << _IOC_TYPESHIFT) | \ |
| ((nr) << _IOC_NRSHIFT) | \ |
| ((size) << _IOC_SIZESHIFT)) |
| |
| #define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0) |
| #define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size)) |
| #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size)) |
| #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size)) |
| |
| /* Used to decode ioctl numbers in drivers despite the leading underscore... */ |
| #define _IOC_DIR(nr) \ |
| ( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)? \ |
| (((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)): \ |
| (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) ) |
| #define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK) |
| #define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK) |
| #define _IOC_SIZE(nr) \ |
| ((((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) == 0)? \ |
| 0: (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK)) |
| |
| /* ...and for the PCMCIA and sound. */ |
| #define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT) |
| #define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT) |
| #define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT) |
| #define IOCSIZE_MASK (_IOC_XSIZEMASK << _IOC_SIZESHIFT) |
| #define IOCSIZE_SHIFT (_IOC_SIZESHIFT) |
| |
| #endif /* !(_SPARC_IOCTL_H) */ |
