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/*
* Id: kmap.c,v 1.1 1999/11/02 03:54:46 keithp Exp $
*
* Copyright © 1999 Keith Packard
*
* 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 Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD 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.
*/
/* $XFree86: xc/programs/Xserver/hw/kdrive/kmap.c,v 1.7 2001/03/30 02:15:20 keithp Exp $ */
#include "kdrive.h"
#ifdef linux
#ifdef __i386__
#define HAS_MTRR
#endif
#endif
#include <errno.h>
#include <unistd.h>
#include <sys/mman.h>
#ifdef HAS_MTRR
#include <asm/mtrr.h>
#endif
#include <sys/ioctl.h>
void *
KdMapDevice (CARD32 addr, CARD32 size)
{
#ifdef WINDOWS
void *a;
void *d;
d = VirtualAlloc (NULL, size, MEM_RESERVE, PAGE_NOACCESS);
if (!d)
return NULL;
DRAW_DEBUG ((DEBUG_S3INIT, "Virtual address of 0x%x is 0x%x", addr, d));
a = VirtualCopyAddr (addr);
DRAW_DEBUG ((DEBUG_S3INIT, "Translated address is 0x%x", a));
if (!VirtualCopy (d, a, size,
PAGE_READWRITE|PAGE_NOCACHE|PAGE_PHYSICAL))
{
DRAW_DEBUG ((DEBUG_FAILURE, "VirtualCopy failed %d",
GetLastError ()));
return NULL;
}
DRAW_DEBUG ((DEBUG_S3INIT, "Device mapped successfully"));
return d;
#endif
#ifdef linux
void *a;
int fd;
fd = open ("/dev/mem", O_RDWR);
if (fd < 0)
FatalError ("KdMapDevice: failed to open /dev/mem (%s)\n",
strerror (errno));
a = mmap ((caddr_t) 0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, addr);
close (fd);
if ((long) a == -1)
FatalError ("KdMapDevice: failed to map frame buffer (%s)\n",
strerror (errno));
return a;
#endif
#ifdef VXWORKS
return (void *) addr;
#endif
}
void
KdUnmapDevice (void *addr, CARD32 size)
{
#ifdef WINDOWS
VirtualFree (addr, size, MEM_DECOMMIT);
VirtualFree (addr, 0, MEM_RELEASE);
#endif
#ifdef linux
munmap (addr, size);
#endif
#ifdef VXWORKS
;
#endif
}
#ifdef HAS_MTRR
static int mtrr;
#endif
void
KdSetMappedMode (CARD32 addr, CARD32 size, int mode)
{
#ifdef HAS_MTRR
struct mtrr_sentry sentry;
unsigned long base, bound;
unsigned int type;
if (addr < 0x100000)
return;
if (!mtrr)
mtrr = open ("/proc/mtrr", 2);
if (mtrr > 0)
{
base = addr & ~((1<22)-1);
bound = ((addr + size) + ((1<<22) - 1)) & ~((1<<22) - 1);
switch (mode) {
case KD_MAPPED_MODE_REGISTERS:
type = MTRR_TYPE_UNCACHABLE;
break;
case KD_MAPPED_MODE_FRAMEBUFFER:
type = MTRR_TYPE_WRCOMB;
break;
}
sentry.base = base;
sentry.size = bound - base;
sentry.type = type;
ioctl (mtrr, MTRRIOC_ADD_ENTRY, &sentry);
}
#endif
}
void
KdResetMappedMode (CARD32 addr, CARD32 size, int mode)
{
#ifdef HAS_MTRR
struct mtrr_sentry sentry;
unsigned long base, bound;
unsigned int type;
if (addr < 0x100000)
return;
if (!mtrr)
mtrr = open ("/proc/mtrr", 2);
if (mtrr > 0)
{
base = addr & ~((1<22)-1);
bound = ((addr + size) + ((1<<22) - 1)) & ~((1<<22) - 1);
switch (mode) {
case KD_MAPPED_MODE_REGISTERS:
type = MTRR_TYPE_UNCACHABLE;
break;
case KD_MAPPED_MODE_FRAMEBUFFER:
type = MTRR_TYPE_WRCOMB;
break;
}
sentry.base = base;
sentry.size = bound - base;
sentry.type = type;
ioctl (mtrr, MTRRIOC_DEL_ENTRY, &sentry);
}
#endif
}
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