mirror of
https://github.com/mpv-player/mpv
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6e9cbdc104
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@29305 b3059339-0415-0410-9bf9-f77b7e298cf2
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/*
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This file is based on:
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$XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
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Modified for readability by Nick Kurshev
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*/
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/*
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* Copyright 1995 by Robin Cutshaw <robin@XFree86.Org>
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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
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the names of the above listed copyright holder(s)
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* not be used in advertising or publicity pertaining to distribution of
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* the software without specific, written prior permission. The above listed
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* copyright holder(s) make(s) no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM(S) ALL WARRANTIES WITH REGARD
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* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE
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* LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
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* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#define INCL_DOSFILEMGR
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#include <os2.h>
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static USHORT callgate[3] = {0,0,0};
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static __inline__ int enable_os_io(void)
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{
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HFILE hfd;
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ULONG dlen,action;
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APIRET rc;
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static char *ioDrvPath = "/dev/fastio$";
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if (DosOpen((PSZ)ioDrvPath, (PHFILE)&hfd, (PULONG)&action,
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(ULONG)0, FILE_SYSTEM, FILE_OPEN,
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OPEN_SHARE_DENYNONE|OPEN_FLAGS_NOINHERIT|OPEN_ACCESS_READONLY,
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(ULONG)0) != 0) {
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fprintf(stderr,"Error opening fastio$ driver...\n");
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fprintf(stderr,"Please install xf86sup.sys in config.sys!\n");
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return 42;
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}
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callgate[0] = callgate[1] = 0;
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/* Get callgate from driver for fast io to ports and other stuff */
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rc = DosDevIOCtl(hfd, (ULONG)0x76, (ULONG)0x64,
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NULL, 0, NULL,
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(ULONG*)&callgate[2], sizeof(USHORT), &dlen);
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if (rc) {
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fprintf(stderr,"xf86-OS/2: EnableIOPorts failed, rc=%d, dlen=%d; emergency exit\n",
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rc,dlen);
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DosClose(hfd);
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return 42;
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}
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/* Calling callgate with function 13 sets IOPL for the program */
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__asm__ volatile ("movl $13,%%ebx;.byte 0xff,0x1d;.long _callgate"
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: /*no outputs */
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: /*no inputs */
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: "eax","ebx","ecx","edx","cc");
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DosClose(hfd);
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return 0;
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}
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static __inline__ int disable_os_io(void)
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{
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/* Nothing to do */
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return 0;
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}
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