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author | Jeff Garzik <jgarzik@pobox.com> | 2005-09-02 00:02:01 +0200 |
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committer | Jeff Garzik <jgarzik@pobox.com> | 2005-09-02 00:02:01 +0200 |
commit | e3ee3b78f83688a0ae4315e8be71b2eac559904a (patch) | |
tree | deb03bcdd020262af450ed23382d7c921263f5cf /include/asm-powerpc/ioctl.h | |
parent | [PATCH] ieee80211: Fix debug comments ipw->ieee80211 (diff) | |
parent | Merge refs/heads/upstream from master.kernel.org:/pub/scm/linux/kernel/git/jg... (diff) | |
download | linux-e3ee3b78f83688a0ae4315e8be71b2eac559904a.tar.xz linux-e3ee3b78f83688a0ae4315e8be71b2eac559904a.zip |
/spare/repo/netdev-2.6 branch 'master'
Diffstat (limited to 'include/asm-powerpc/ioctl.h')
-rw-r--r-- | include/asm-powerpc/ioctl.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/asm-powerpc/ioctl.h b/include/asm-powerpc/ioctl.h new file mode 100644 index 000000000000..93c6acfdd0fd --- /dev/null +++ b/include/asm-powerpc/ioctl.h @@ -0,0 +1,69 @@ +#ifndef _PPC_IOCTL_H +#define _PPC_IOCTL_H + + +/* + * this was copied from the alpha as it's a bit cleaner there. + * -- Cort + */ + +#define _IOC_NRBITS 8 +#define _IOC_TYPEBITS 8 +#define _IOC_SIZEBITS 13 +#define _IOC_DIRBITS 3 + +#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 _IOC_NONE could be 0, but OSF/1 gives it a bit. + * And this turns out useful to catch old ioctl numbers in header + * files for us. + */ +#define _IOC_NONE 1U +#define _IOC_READ 2U +#define _IOC_WRITE 4U + +#define _IOC(dir,type,nr,size) \ + (((dir) << _IOC_DIRSHIFT) | \ + ((type) << _IOC_TYPESHIFT) | \ + ((nr) << _IOC_NRSHIFT) | \ + ((size) << _IOC_SIZESHIFT)) + +/* provoke compile error for invalid uses of size argument */ +extern unsigned int __invalid_size_argument_for_IOC; +#define _IOC_TYPECHECK(t) \ + ((sizeof(t) == sizeof(t[1]) && \ + sizeof(t) < (1 << _IOC_SIZEBITS)) ? \ + sizeof(t) : __invalid_size_argument_for_IOC) + +/* used to create numbers */ +#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0) +#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size))) +#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size))) +#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size))) +#define _IOR_BAD(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size)) +#define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size)) +#define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size)) + +/* used to decode them.. */ +#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) + +/* various drivers, such as the pcmcia stuff, need these... */ +#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 |