1#ifndef _PPC64_IOCTL_H 2#define _PPC64_IOCTL_H 3 4 5/* 6 * This was copied from the alpha as it's a bit cleaner there. 7 * -- Cort 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 */ 14 15#define _IOC_NRBITS 8 16#define _IOC_TYPEBITS 8 17#define _IOC_SIZEBITS 13 18#define _IOC_DIRBITS 3 19 20#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) 21#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) 22#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1) 23#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1) 24 25#define _IOC_NRSHIFT 0 26#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS) 27#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS) 28#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) 29 30/* 31 * Direction bits _IOC_NONE could be 0, but OSF/1 gives it a bit. 32 * And this turns out useful to catch old ioctl numbers in header 33 * files for us. 34 */ 35#define _IOC_NONE 1U 36#define _IOC_READ 2U 37#define _IOC_WRITE 4U 38 39#define _IOC(dir,type,nr,size) \ 40 (((dir) << _IOC_DIRSHIFT) | \ 41 ((type) << _IOC_TYPESHIFT) | \ 42 ((nr) << _IOC_NRSHIFT) | \ 43 ((size) << _IOC_SIZESHIFT)) 44 45/* used to create numbers */ 46#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0) 47#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size)) 48#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size)) 49#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size)) 50 51/* used to decode them.. */ 52#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) 53#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK) 54#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK) 55#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK) 56 57/* various drivers, such as the pcmcia stuff, need these... */ 58#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT) 59#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT) 60#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT) 61#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT) 62#define IOCSIZE_SHIFT (_IOC_SIZESHIFT) 63 64#endif /* _PPC64_IOCTL_H */ 65