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/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/bsdi/bsdi_video.c,v 3.10 2003/03/14 13:46:05 tsi Exp $ */
/*
* Copyright 1992 by Rich Murphey <Rich@Rice.edu>
* Copyright 1993 by David Wexelblat <dwex@goblin.org>
*
* 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 names of Rich Murphey and David Wexelblat
* not be used in advertising or publicity pertaining to distribution of
* the software without specific, written prior permission. Rich Murphey and
* David Wexelblat make no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL RICH MURPHEY OR 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: bsdi_video.c /main/4 1996/02/21 17:51:22 kaleb $ */
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include "input.h"
#include "scrnintstr.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#include "xf86OSpriv.h"
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
/***************************************************************************/
/* Video Memory Mapping section */
/***************************************************************************/
pointer
xf86MapVidMem(int ScreenNum, int Flags, unsigned long Base, unsigned long Size)
{
pointer base;
/* just try the mapping, and either it will work, or not */
base = mmap(0, Size,
(Flags & VIDMEM_READONLY) ?
PROT_READ : (PROT_READ | PROT_WRITE),
MAP_FILE, xf86Info.screenFd, Base - 0xA0000);
if (base == MAP_FAILED)
{
FatalError("xf86MapVidMem: Could not mmap /dev/vga (%s) at 0x%x\n",
strerror(errno), Base);
}
return(base);
}
void
xf86UnMapVidMem(int ScreenNum, pointer Base, unsigned long Size)
{
munmap((caddr_t)Base, Size);
}
Bool
xf86LinearVidMem()
{
return(TRUE);
}
/***************************************************************************/
/* I/O Permissions section */
/***************************************************************************/
/*
* BSDI has a single system-wide TSS I/O bitmap that covers ports up to
* 0xFFFF. By default, the TSS has ports 0x3B0-0x3DF enabled.
*
* It also allows the IOPL to be enabled or disabled on a per-process
* basis. Here, we use the IOPL only.
*/
static Bool ExtendedEnabled = FALSE;
Bool
xf86EnableIO()
{
if (ExtendedEnabled)
return TRUE;
if (ioctl(xf86Info.consoleFd, PCCONENABIOPL, 0) < 0)
{
xf86Msg(X_WARNING,"%s: Failed to set IOPL for extended I/O\n",
"xf86EnableIOPorts");
return FALSE;
}
ExtendedEnabled = TRUE;
return TRUE;
}
void
xf86DisableIO()
{
if (!ExtendedEnabled)
return;
ioctl(xf86Info.consoleFd, PCCONDISABIOPL, 0);
ExtendedEnabled = FALSE;
}
/***************************************************************************/
/* Interrupt Handling section */
/***************************************************************************/
Bool
xf86DisableInterrupts()
{
if (!ExtendedEnabled)
{
if (ioctl(xf86Info.consoleFd, PCCONENABIOPL, 0) < 0)
{
return(FALSE);
}
}
#ifdef __GNUC__
__asm__ __volatile__("cli");
#else
asm("cli");
#endif /* __GNUC__ */
if (!ExtendedEnabled)
{
ioctl(xf86Info.consoleFd, PCCONDISABIOPL, 0);
}
return(TRUE);
}
void
xf86EnableInterrupts()
{
if (!ExtendedEnabled)
{
ioctl(xf86Info.consoleFd, PCCONENABIOPL, 0);
}
#ifdef __GNUC__
__asm__ __volatile__("sti");
#else
asm("sti");
#endif /* __GNUC__ */
if (!ExtendedEnabled)
{
ioctl(xf86Info.consoleFd, PCCONDISABIOPL, 0);
}
return;
}
void
xf86MapReadSideEffects(int ScreenNum, int Flags, pointer Base,
unsigned long Size)
{
}
Bool
xf86CheckMTRR(int ScreenNum)
{
return FALSE;
}
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