169 lines
4.3 KiB
C
169 lines
4.3 KiB
C
/*
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* Copyright 1992 by Orest Zborowski <obz@Kodak.com>
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* Copyright 1993 by David Wexelblat <dwex@goblin.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 Orest Zborowski and David Wexelblat
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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. Orest Zborowski
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* and David Wexelblat make 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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* OREST ZBOROWSKI AND DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD
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* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL OREST ZBOROWSKI OR DAVID WEXELBLAT BE LIABLE
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* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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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 <errno.h>
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#include <string.h>
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#include <X11/X.h>
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#include "input.h"
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#include "scrnintstr.h"
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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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static Bool ExtendedEnabled = FALSE;
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#ifdef __ia64__
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#include "compiler.h"
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#include <sys/io.h>
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#elif !defined(__powerpc__) && \
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!defined(__mc68000__) && \
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!defined(__sparc__) && \
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!defined(__mips__) && \
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!defined(__nds32__) && \
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!defined(__arm__) && \
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!defined(__aarch64__) && \
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!defined(__arc__) && \
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!defined(__xtensa__)
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/*
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* Due to conflicts with "compiler.h", don't rely on <sys/io.h> to declare
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* these.
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*/
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extern int ioperm(unsigned long __from, unsigned long __num, int __turn_on);
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extern int iopl(int __level);
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#endif
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/***************************************************************************/
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/* Video Memory Mapping section */
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/***************************************************************************/
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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(__powerpc__)
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volatile unsigned char *ioBase = NULL;
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#ifndef __NR_pciconfig_iobase
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#define __NR_pciconfig_iobase 200
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#endif
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static Bool
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hwEnableIO(void)
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{
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int fd;
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unsigned int ioBase_phys = syscall(__NR_pciconfig_iobase, 2, 0, 0);
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fd = open("/dev/mem", O_RDWR);
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if (ioBase == NULL) {
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ioBase = (volatile unsigned char *) mmap(0, 0x20000,
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PROT_READ | PROT_WRITE,
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MAP_SHARED, fd, ioBase_phys);
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}
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close(fd);
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return ioBase != MAP_FAILED;
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}
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static void
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hwDisableIO(void)
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{
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munmap(ioBase, 0x20000);
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ioBase = NULL;
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}
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#elif defined(__i386__) || defined(__x86_64__) || defined(__ia64__) || \
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defined(__alpha__)
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static Bool
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hwEnableIO(void)
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{
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if (ioperm(0, 1024, 1) || iopl(3)) {
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ErrorF("xf86EnableIOPorts: failed to set IOPL for I/O (%s)\n",
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strerror(errno));
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return FALSE;
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}
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#if !defined(__alpha__)
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/* XXX: this is actually not trapping anything because of iopl(3)
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* above */
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ioperm(0x40, 4, 0); /* trap access to the timer chip */
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ioperm(0x60, 4, 0); /* trap access to the keyboard controller */
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#endif
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return TRUE;
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}
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static void
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hwDisableIO(void)
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{
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iopl(0);
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ioperm(0, 1024, 0);
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}
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#else /* non-IO architectures */
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#define hwEnableIO() TRUE
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#define hwDisableIO() do {} while (0)
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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 (ExtendedEnabled)
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return TRUE;
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ExtendedEnabled = hwEnableIO();
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return ExtendedEnabled;
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}
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void
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xf86DisableIO(void)
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{
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if (!ExtendedEnabled)
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return;
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hwDisableIO();
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ExtendedEnabled = FALSE;
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}
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