diff options
Diffstat (limited to 'nx-X11/programs/Xserver/hw/xfree86/os-support/os2/os2_ioperm.c')
| -rw-r--r-- | nx-X11/programs/Xserver/hw/xfree86/os-support/os2/os2_ioperm.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/hw/xfree86/os-support/os2/os2_ioperm.c b/nx-X11/programs/Xserver/hw/xfree86/os-support/os2/os2_ioperm.c new file mode 100644 index 000000000..c03bb96af --- /dev/null +++ b/nx-X11/programs/Xserver/hw/xfree86/os-support/os2/os2_ioperm.c @@ -0,0 +1,140 @@ +/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/os2/os2_ioperm.c,v 3.5 1997/08/26 10:01:38 hohndel Exp $ */ +/* + * Copyright 1993 by David Wexelblat <dwex@goblin.org> + * Modified 1996 by Sebastien Marineau <marineau@genie.uottawa.ca> + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of David Wexelblat not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. David Wexelblat makes no representations + * about the suitability of this software for any purpose. It is provided + * "as is" without express or implied warranty. + * + * DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL DAVID WEXELBLAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + * + */ +/* $XConsortium: os2_ioperm.c /main/4 1996/04/18 16:50:01 kaleb $ */ + + + +#define I_NEED_OS2_H +#define INCL_32 +#define INCL_DOS +#define INCL_DOSFILEMGR +#ifdef HAVE_XORG_CONFIG_H +#include <xorg-config.h> +#endif + +#include "xf86.h" +#include "xf86Priv.h" +#include "xf86_OSlib.h" + +/* + * To access I/O ports under OS/2, we use the xf86sup.sys driver. + * For the moment, we use a function which basically grants IO priviledge + * to the whole server. NOTE: Once the server is running, we should + * change this to use inline IO functions through the callgate returned by + * the fastio$ driver. + */ + +int ioEnabled=FALSE; +ULONG action; +char *ioDrvPath = "/dev/fastio$"; +USHORT callgate[3]={0,0,0}; + + +Bool xf86EnableIO() +{ + +HFILE hfd; + ULONG dlen; + APIRET rc; + + /* no need to call multiple times */ + if (ioEnabled) return TRUE; + + if (DosOpen((PSZ)ioDrvPath, (PHFILE)&hfd, (PULONG)&action, + (ULONG)0, FILE_SYSTEM, FILE_OPEN, + OPEN_SHARE_DENYNONE|OPEN_FLAGS_NOINHERIT|OPEN_ACCESS_READONLY, + (ULONG)0) != 0) { + xf86Msg(X_ERROR,"Error opening fastio$ driver...\n"); + xf86Msg(X_ERROR,"Please install xf86sup.sys in config.sys!\n"); + return FALSE; + } + callgate[0] = callgate[1] = 0; + +/* Get callgate from driver for fast io to ports and other stuff */ + + rc = DosDevIOCtl(hfd, (ULONG)0x76, (ULONG)0x64, + NULL, 0, NULL, + (ULONG*)&callgate[2], sizeof(USHORT), &dlen); + if (rc) { + xf86Msg(X_ERROR, + "EnableIOPorts failed, rc=%d, dlen=%d; emergency exit\n", + rc,dlen); + DosClose(hfd); + return FALSE; + } + +/* Calling callgate with function 13 sets IOPL for the program */ + + asm volatile ("movl $13,%%ebx;.byte 0xff,0x1d;.long _callgate" + : /*no outputs */ + : /*no inputs */ + : "eax","ebx","ecx","edx","cc"); + + ioEnabled = TRUE; + DosClose(hfd); + return TRUE; +} + +void xf86DisableIO() +{ +HFILE hfd; + ULONG dlen; + APIRET rc; + + /* no need to call multiple times */ + if (!ioEnabled) return; + + if (DosOpen((PSZ)ioDrvPath, (PHFILE)&hfd, (PULONG)&action, + (ULONG)0, FILE_SYSTEM, FILE_OPEN, + OPEN_SHARE_DENYNONE|OPEN_FLAGS_NOINHERIT|OPEN_ACCESS_READONLY, + (ULONG)0) != 0) { + xf86Msg(X_ERROR,"Error opening fastio$ driver...\n"); + xf86Msg(X_ERROR,"Please install xf86sup.sys in config.sys!\n"); + return; + } + callgate[0] = callgate[1] = 0; + + rc = DosDevIOCtl(hfd, (ULONG)0x76, (ULONG)0x64, + NULL, 0, NULL, + (ULONG*)&callgate[2], sizeof(USHORT), &dlen); + if (rc) { + xf86Msg(X_ERROR,"DisableIOPorts failed, rc=%d, dlen=%d\n", + rc,dlen); + DosClose(hfd); + return; + } + +/* Function 14 of callgate brings program back to ring 3 */ + + asm volatile ("movl $14,%%ebx;.byte 0xff,0x1d;.long _callgate" + : /*no outputs */ + : /*no inputs */ + : "eax","ebx","ecx","edx","cc"); + ioEnabled=FALSE; + DosClose(hfd); + return; + +} + |