108 lines
4.0 KiB
C
108 lines
4.0 KiB
C
/*
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* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany
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* Copyright 1993 by David Wexelblat <dwex@goblin.org>
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* Copyright 1999 by David Holland <davidh@iquest.net>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the names of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
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* SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*
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*/
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/* Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <sys/types.h> /* get __x86 definition if not set by compiler */
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#if defined(__i386__) || defined(__i386) || defined(__x86)
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#define _NEED_SYSI86
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#endif
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "xf86_OSlib.h"
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#include "xf86OSpriv.h"
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#include <sys/mman.h>
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/***************************************************************************/
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/* Video Memory Mapping section */
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/***************************************************************************/
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_X_HIDDEN void
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xf86OSInitVidMem(VidMemInfoPtr pVidMem)
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{
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pVidMem->initialised = TRUE;
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}
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/***************************************************************************/
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/* I/O Permissions section */
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/***************************************************************************/
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#if defined(__i386__) || defined(__i386) || defined(__x86)
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static Bool ExtendedEnabled = FALSE;
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#endif
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Bool
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xf86EnableIO(void)
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{
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#if defined(__i386__) || defined(__i386) || defined(__x86)
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if (ExtendedEnabled)
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return TRUE;
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if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) < 0) {
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xf86Msg(X_WARNING, "xf86EnableIOPorts: Failed to set IOPL for I/O\n");
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return FALSE;
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}
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ExtendedEnabled = TRUE;
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#endif /* i386 */
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return TRUE;
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}
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void
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xf86DisableIO(void)
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{
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#if defined(__i386__) || defined(__i386) || defined(__x86)
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if (!ExtendedEnabled)
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return;
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sysi86(SI86V86, V86SC_IOPL, 0);
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ExtendedEnabled = FALSE;
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#endif /* i386 */
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}
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