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
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