/*
* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany
* Copyright 1993 by David Wexelblat <dwex@goblin.org>
* Copyright 1999 by David Holland <davidh@iquest.net>
*
* 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 the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
* SHALL THE COPYRIGHT HOLDERS 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.
*
*/
/* Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <sys/types.h> /* get __x86 definition if not set by compiler */
#if defined(__i386__) || defined(__i386) || defined(__x86)
#define _NEED_SYSI86
#endif
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#include "xf86OSpriv.h"
#include <sys/mman.h>
/***************************************************************************/
/* Video Memory Mapping section */
/***************************************************************************/
static char *apertureDevName = NULL;
static int apertureDevFD_ro = -1;
static int apertureDevFD_rw = -1;
static Bool
solOpenAperture(void)
{
if (apertureDevName == NULL) {
apertureDevName = "/dev/xsvc";
if ((apertureDevFD_rw = open(apertureDevName, O_RDWR)) < 0) {
xf86MsgVerb(X_WARNING, 0,
"solOpenAperture: failed to open %s (%s)\n",
apertureDevName, strerror(errno));
apertureDevName = "/dev/fbs/aperture";
apertureDevFD_rw = open(apertureDevName, O_RDWR);
}
apertureDevFD_ro = open(apertureDevName, O_RDONLY);
if ((apertureDevFD_rw < 0) || (apertureDevFD_ro < 0)) {
xf86MsgVerb(X_WARNING, 0,
"solOpenAperture: failed to open %s (%s)\n",
apertureDevName, strerror(errno));
xf86MsgVerb(X_WARNING, 0,
"solOpenAperture: either /dev/fbs/aperture"
" or /dev/xsvc required\n");
apertureDevName = NULL;
if (apertureDevFD_rw >= 0) {
close(apertureDevFD_rw);
}
apertureDevFD_rw = -1;
if (apertureDevFD_ro >= 0) {
close(apertureDevFD_ro);
}
apertureDevFD_ro = -1;
return FALSE;
}
}
return TRUE;
}
static pointer
solMapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int Flags)
{
pointer base;
int fd;
int prot;
if (Flags & VIDMEM_READONLY) {
fd = apertureDevFD_ro;
prot = PROT_READ;
}
else {
fd = apertureDevFD_rw;
prot = PROT_READ | PROT_WRITE;
}
if (fd < 0) {
xf86DrvMsg(ScreenNum, X_ERROR,
"solMapVidMem: failed to open %s (%s)\n",
apertureDevName, strerror(errno));
return NULL;
}
base = mmap(NULL, Size, prot, MAP_SHARED, fd, (off_t) Base);
if (base == MAP_FAILED) {
xf86DrvMsg(ScreenNum, X_ERROR,
"solMapVidMem: failed to mmap %s (0x%08lx,0x%lx) (%s)\n",
apertureDevName, Base, Size, strerror(errno));
return NULL;
}
return base;
}
/* ARGSUSED */
static void
solUnMapVidMem(int ScreenNum, pointer Base, unsigned long Size)
{
if (munmap(Base, Size) != 0) {
xf86DrvMsgVerb(ScreenNum, X_WARNING, 0,
"solUnMapVidMem: failed to unmap %s"
" (0x%p,0x%lx) (%s)\n",
apertureDevName, Base, Size, strerror(errno));
}
}
_X_HIDDEN void
xf86OSInitVidMem(VidMemInfoPtr pVidMem)
{
pVidMem->linearSupported = solOpenAperture();
if (pVidMem->linearSupported) {
pVidMem->mapMem = solMapVidMem;
pVidMem->unmapMem = solUnMapVidMem;
}
else {
xf86MsgVerb(X_WARNING, 0,
"xf86OSInitVidMem: linear memory access disabled\n");
}
pVidMem->initialised = TRUE;
}
/*
* Read BIOS via mmap()ing physical memory.
*/
int
xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
int Len)
{
unsigned char *ptr;
int psize;
int mlen;
psize = getpagesize();
Offset += Base & (psize - 1);
Base &= ~(psize - 1);
mlen = (Offset + Len + psize - 1) & ~(psize - 1);
if (solOpenAperture() == FALSE) {
xf86Msg(X_WARNING,
"xf86ReadBIOS: Failed to open aperture to read BIOS\n");
return -1;
}
ptr = (unsigned char *) mmap(NULL, mlen, PROT_READ,
MAP_SHARED, apertureDevFD_ro, (off_t) Base);
if (ptr == MAP_FAILED) {
xf86Msg(X_WARNING, "xf86ReadBIOS: %s mmap failed [0x%08lx, 0x%04x]\n",
apertureDevName, Base, mlen);
return -1;
}
(void) memcpy(Buf, (void *) (ptr + Offset), Len);
if (munmap((caddr_t) ptr, mlen) != 0) {
xf86MsgVerb(X_WARNING, 0,
"xf86ReadBIOS: failed to unmap %s (0x%p,0x%x) (%s)\n",
apertureDevName, ptr, mlen, strerror(errno));
}
return Len;
}
/***************************************************************************/
/* I/O Permissions section */
/***************************************************************************/
#if defined(__i386__) || defined(__i386) || defined(__x86)
static Bool ExtendedEnabled = FALSE;
#endif
Bool
xf86EnableIO(void)
{
#if defined(__i386__) || defined(__i386) || defined(__x86)
if (ExtendedEnabled)
return TRUE;
if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) < 0) {
xf86Msg(X_WARNING, "xf86EnableIOPorts: Failed to set IOPL for I/O\n");
return FALSE;
}
ExtendedEnabled = TRUE;
#endif /* i386 */
return TRUE;
}
void
xf86DisableIO(void)
{
#if defined(__i386__) || defined(__i386) || defined(__x86)
if (!ExtendedEnabled)
return;
sysi86(SI86V86, V86SC_IOPL, 0);
ExtendedEnabled = FALSE;
#endif /* i386 */
}