diff options
Diffstat (limited to 'include/asm-h8300/ioctl.h')
| -rw-r--r-- | include/asm-h8300/ioctl.h | 81 |
1 files changed, 1 insertions, 80 deletions
diff --git a/include/asm-h8300/ioctl.h b/include/asm-h8300/ioctl.h index 031c623478b3..b279fe06dfe5 100644 --- a/include/asm-h8300/ioctl.h +++ b/include/asm-h8300/ioctl.h | |||
| @@ -1,80 +1 @@ | |||
| 1 | /* $Id: ioctl.h,v 1.1 2002/11/19 02:09:26 gerg Exp $ | #include <asm-generic/ioctl.h> | |
| 2 | * | ||
| 3 | * linux/ioctl.h for Linux by H.H. Bergman. | ||
| 4 | */ | ||
| 5 | |||
| 6 | #ifndef _H8300_IOCTL_H | ||
| 7 | #define _H8300_IOCTL_H | ||
| 8 | |||
| 9 | /* ioctl command encoding: 32 bits total, command in lower 16 bits, | ||
| 10 | * size of the parameter structure in the lower 14 bits of the | ||
| 11 | * upper 16 bits. | ||
| 12 | * Encoding the size of the parameter structure in the ioctl request | ||
| 13 | * is useful for catching programs compiled with old versions | ||
| 14 | * and to avoid overwriting user space outside the user buffer area. | ||
| 15 | * The highest 2 bits are reserved for indicating the ``access mode''. | ||
| 16 | * NOTE: This limits the max parameter size to 16kB -1 ! | ||
| 17 | */ | ||
| 18 | |||
| 19 | /* | ||
| 20 | * I don't really have any idea about what this should look like, so | ||
| 21 | * for the time being, this is heavily based on the PC definitions. | ||
| 22 | */ | ||
| 23 | |||
| 24 | /* | ||
| 25 | * The following is for compatibility across the various Linux | ||
| 26 | * platforms. The i386 ioctl numbering scheme doesn't really enforce | ||
| 27 | * a type field. De facto, however, the top 8 bits of the lower 16 | ||
| 28 | * bits are indeed used as a type field, so we might just as well make | ||
| 29 | * this explicit here. Please be sure to use the decoding macros | ||
| 30 | * below from now on. | ||
| 31 | */ | ||
| 32 | #define _IOC_NRBITS 8 | ||
| 33 | #define _IOC_TYPEBITS 8 | ||
| 34 | #define _IOC_SIZEBITS 14 | ||
| 35 | #define _IOC_DIRBITS 2 | ||
| 36 | |||
| 37 | #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) | ||
| 38 | #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) | ||
| 39 | #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1) | ||
| 40 | #define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1) | ||
| 41 | |||
| 42 | #define _IOC_NRSHIFT 0 | ||
| 43 | #define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS) | ||
| 44 | #define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS) | ||
| 45 | #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) | ||
| 46 | |||
| 47 | /* | ||
| 48 | * Direction bits. | ||
| 49 | */ | ||
| 50 | #define _IOC_NONE 0U | ||
| 51 | #define _IOC_WRITE 1U | ||
| 52 | #define _IOC_READ 2U | ||
| 53 | |||
| 54 | #define _IOC(dir,type,nr,size) \ | ||
| 55 | (((dir) << _IOC_DIRSHIFT) | \ | ||
| 56 | ((type) << _IOC_TYPESHIFT) | \ | ||
| 57 | ((nr) << _IOC_NRSHIFT) | \ | ||
| 58 | ((size) << _IOC_SIZESHIFT)) | ||
| 59 | |||
| 60 | /* used to create numbers */ | ||
| 61 | #define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0) | ||
| 62 | #define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size)) | ||
| 63 | #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size)) | ||
| 64 | #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size)) | ||
| 65 | |||
| 66 | /* used to decode ioctl numbers.. */ | ||
| 67 | #define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) | ||
| 68 | #define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK) | ||
| 69 | #define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK) | ||
| 70 | #define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK) | ||
| 71 | |||
| 72 | /* ...and for the drivers/sound files... */ | ||
| 73 | |||
| 74 | #define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT) | ||
| 75 | #define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT) | ||
| 76 | #define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT) | ||
| 77 | #define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT) | ||
| 78 | #define IOCSIZE_SHIFT (_IOC_SIZESHIFT) | ||
| 79 | |||
| 80 | #endif /* _H8300_IOCTL_H */ | ||
