| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 */ |