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