mirror of https://gitee.com/openkylin/linux.git
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
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/*
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* Linux/PA-RISC Project (http://www.parisc-linux.org/)
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* Copyright (C) 1999,2003 Matthew Wilcox < willy at debian . org >
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* portions from "linux/ioctl.h for Linux" by H.H. Bergman.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _ASM_PARISC_IOCTL_H
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#define _ASM_PARISC_IOCTL_H
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/* ioctl command encoding: 32 bits total, command in lower 16 bits,
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* size of the parameter structure in the lower 14 bits of the
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* upper 16 bits.
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* Encoding the size of the parameter structure in the ioctl request
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* is useful for catching programs compiled with old versions
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* and to avoid overwriting user space outside the user buffer area.
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* The highest 2 bits are reserved for indicating the ``access mode''.
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* NOTE: This limits the max parameter size to 16kB -1 !
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*/
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/*
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* Direction bits.
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*/
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#define _IOC_NONE 0U
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#define _IOC_WRITE 2U
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#define _IOC_READ 1U
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#include <asm-generic/ioctl.h>
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#endif /* _ASM_PARISC_IOCTL_H */
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