| #ifndef _ASM_M32R_IOCTL_H |
| #define _ASM_M32R_IOCTL_H |
| |
| /* $Id$ */ |
| |
| /* orig : i386 2.4.18 */ |
| |
| /* |
| * linux/ioctl.h for Linux by H.H. Bergman. |
| */ |
| |
| /* ioctl command encoding: 32 bits total, command in lower 16 bits, |
| * size of the parameter structure in the lower 14 bits of the |
| * upper 16 bits. |
| * Encoding the size of the parameter structure in the ioctl request |
| * is useful for catching programs compiled with old versions |
| * and to avoid overwriting user space outside the user buffer area. |
| * The highest 2 bits are reserved for indicating the ``access mode''. |
| * NOTE: This limits the max parameter size to 16kB -1 ! |
| */ |
| |
| /* |
| * The following is for compatibility across the various Linux |
| * platforms. The i386 ioctl numbering scheme doesn't really enforce |
| * a type field. De facto, however, the top 8 bits of the lower 16 |
| * bits are indeed used as a type field, so we might just as well make |
| * this explicit here. Please be sure to use the decoding macros |
| * below from now on. |
| */ |
| #define _IOC_NRBITS 8 |
| #define _IOC_TYPEBITS 8 |
| #define _IOC_SIZEBITS 14 |
| #define _IOC_DIRBITS 2 |
| |
| #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) |
| #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) |
| #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-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) |
| |
| /* |
| * Direction bits. |
| */ |
| #define _IOC_NONE 0U |
| #define _IOC_WRITE 1U |
| #define _IOC_READ 2U |
| |
| #define _IOC(dir,type,nr,size) \ |
| (((dir) << _IOC_DIRSHIFT) | \ |
| ((type) << _IOC_TYPESHIFT) | \ |
| ((nr) << _IOC_NRSHIFT) | \ |
| ((size) << _IOC_SIZESHIFT)) |
| |
| /* used to create numbers */ |
| #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.. */ |
| #define _IOC_DIR(nr) (((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_SIZESHIFT) & _IOC_SIZEMASK) |
| |
| /* ...and for the drivers/sound files... */ |
| |
| #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_SIZEMASK << _IOC_SIZESHIFT) |
| #define IOCSIZE_SHIFT (_IOC_SIZESHIFT) |
| |
| #endif /* _ASM_M32R_IOCTL_H */ |
