1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * Linux/PA-RISC Project (http://www.parisc-linux.org/) 4 * Copyright (C) 1999,2003 Matthew Wilcox < willy at debian . org > 5 * portions from "linux/ioctl.h for Linux" by H.H. Bergman. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 23 #ifndef _ASM_PARISC_IOCTL_H 24 #define _ASM_PARISC_IOCTL_H 25 26 /* ioctl command encoding: 32 bits total, command in lower 16 bits, 27 * size of the parameter structure in the lower 14 bits of the 28 * upper 16 bits. 29 * Encoding the size of the parameter structure in the ioctl request 30 * is useful for catching programs compiled with old versions 31 * and to avoid overwriting user space outside the user buffer area. 32 * The highest 2 bits are reserved for indicating the ``access mode''. 33 * NOTE: This limits the max parameter size to 16kB -1 ! 34 */ 35 36 /* 37 * Direction bits. 38 */ 39 #define _IOC_NONE 0U 40 #define _IOC_WRITE 2U 41 #define _IOC_READ 1U 42 43 #include <asm-generic/ioctl.h> 44 45 #endif /* _ASM_PARISC_IOCTL_H */ 46