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/*
* 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.
*
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include "xf86.h"
#include "xf86Priv.h"
#include <sys/param.h>
#ifndef __NetBSD__
#include <sys/sysctl.h>
#endif
#include "xf86_OSlib.h"
#include "xf86OSpriv.h"
#if defined(__NetBSD__) && !defined(MAP_FILE)
#define MAP_FLAGS MAP_SHARED
#else
#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
#endif
#ifndef __NetBSD__
extern unsigned long dense_base(void);
#else /* __NetBSD__ */
static struct alpha_bus_window *abw;
static int abw_count = -1;
static void
init_abw(void)
{
if (abw_count < 0) {
abw_count = alpha_bus_getwindows(ALPHA_BUS_TYPE_PCI_MEM, &abw);
if (abw_count <= 0)
FatalError("init_abw: alpha_bus_getwindows failed\n");
}
}
static unsigned long
dense_base(void)
{
if (abw_count < 0)
init_abw();
/* XXX check abst_flags for ABST_DENSE just to be safe? */
xf86Msg(X_INFO, "dense base = %#lx\n", abw[0].abw_abst.abst_sys_start); /* XXXX */
return abw[0].abw_abst.abst_sys_start;
}
#endif /* __NetBSD__ */
#define BUS_BASE dense_base()
/***************************************************************************/
/* Video Memory Mapping section */
/***************************************************************************/
#ifdef __OpenBSD__
#define SYSCTL_MSG "\tCheck that you have set 'machdep.allowaperture=1'\n"\
"\tin /etc/sysctl.conf and reboot your machine\n" \
"\trefer to xf86(4) for details"
#endif
static int devMemFd = -1;
#ifdef HAS_APERTURE_DRV
#define DEV_APERTURE "/dev/xf86"
#endif
/*
* Check if /dev/mem can be mmap'd. If it can't print a warning when
* "warn" is TRUE.
*/
static void
checkDevMem(Bool warn)
{
static Bool devMemChecked = FALSE;
int fd;
void *base;
if (devMemChecked)
return;
devMemChecked = TRUE;
#ifdef HAS_APERTURE_DRV
/* Try the aperture driver first */
if ((fd = open(DEV_APERTURE, O_RDWR)) >= 0) {
/* Try to map a page at the VGA address */
base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t) 0xA0000 + BUS_BASE);
if (base != MAP_FAILED) {
munmap((caddr_t) base, 4096);
devMemFd = fd;
xf86Msg(X_INFO, "checkDevMem: using aperture driver %s\n",
DEV_APERTURE);
return;
}
else {
if (warn) {
xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
DEV_APERTURE, strerror(errno));
}
}
}
#endif
if ((fd = open(DEV_MEM, O_RDWR)) >= 0) {
/* Try to map a page at the VGA address */
base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t) 0xA0000 + BUS_BASE);
if (base != MAP_FAILED) {
munmap((caddr_t) base, 4096);
devMemFd = fd;
return;
}
else {
if (warn) {
xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
DEV_MEM, strerror(errno));
}
}
}
if (warn) {
#ifndef HAS_APERTURE_DRV
xf86Msg(X_WARNING, "checkDevMem: failed to open/mmap %s (%s)\n",
DEV_MEM, strerror(errno));
#else
#ifndef __OpenBSD__
xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n"
"\t(%s)\n", DEV_APERTURE, DEV_MEM, strerror(errno));
#else /* __OpenBSD__ */
xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n"
"\t(%s)\n%s", DEV_APERTURE, DEV_MEM, strerror(errno),
SYSCTL_MSG);
#endif /* __OpenBSD__ */
#endif
xf86ErrorF("\tlinear framebuffer access unavailable\n");
}
return;
}
void
xf86OSInitVidMem(VidMemInfoPtr pVidMem)
{
checkDevMem(TRUE);
pVidMem->initialised = TRUE;
}
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
extern int ioperm(unsigned long from, unsigned long num, int on);
Bool
xf86EnableIO()
{
if (!ioperm(0, 65536, TRUE))
return TRUE;
return FALSE;
}
void
xf86DisableIO()
{
return;
}
#endif /* __FreeBSD_kernel__ || __OpenBSD__ */
#ifdef USE_ALPHA_PIO
Bool
xf86EnableIO()
{
alpha_pci_io_enable(1);
return TRUE;
}
void
xf86DisableIO()
{
alpha_pci_io_enable(0);
}
#endif /* USE_ALPHA_PIO */
extern int readDense8(void *Base, register unsigned long Offset);
extern int readDense16(void *Base, register unsigned long Offset);
extern int readDense32(void *Base, register unsigned long Offset);
extern void
writeDense8(int Value, void *Base, register unsigned long Offset);
extern void
writeDense16(int Value, void *Base, register unsigned long Offset);
extern void
writeDense32(int Value, void *Base, register unsigned long Offset);
void (*xf86WriteMmio8) (int Value, void *Base, unsigned long Offset)
= writeDense8;
void (*xf86WriteMmio16) (int Value, void *Base, unsigned long Offset)
= writeDense16;
void (*xf86WriteMmio32) (int Value, void *Base, unsigned long Offset)
= writeDense32;
int (*xf86ReadMmio8) (void *Base, unsigned long Offset)
= readDense8;
int (*xf86ReadMmio16) (void *Base, unsigned long Offset)
= readDense16;
int (*xf86ReadMmio32) (void *Base, unsigned long Offset)
= readDense32;
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