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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Linux/PA-RISC Project (http://www.parisc-linux.org/)
3 * Copyright (C) 1999,2003 Matthew Wilcox < willy at debian . org >
4 * portions from "linux/ioctl.h for Linux" by H.H. Bergman.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21
22#ifndef _ASM_PARISC_IOCTL_H
23#define _ASM_PARISC_IOCTL_H
24
25/* ioctl command encoding: 32 bits total, command in lower 16 bits,
26 * size of the parameter structure in the lower 14 bits of the
27 * upper 16 bits.
28 * Encoding the size of the parameter structure in the ioctl request
29 * is useful for catching programs compiled with old versions
30 * and to avoid overwriting user space outside the user buffer area.
31 * The highest 2 bits are reserved for indicating the ``access mode''.
32 * NOTE: This limits the max parameter size to 16kB -1 !
33 */
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035/*
36 * Direction bits.
37 */
38#define _IOC_NONE 0U
39#define _IOC_WRITE 2U
40#define _IOC_READ 1U
41
Robert P. J. Dayf54d8a12008-05-14 15:14:52 -040042#include <asm-generic/ioctl.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44#endif /* _ASM_PARISC_IOCTL_H */