1 files changed, 300 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/hw/xfree86/os-support/shared/vidmem.c b/nx-X11/programs/Xserver/hw/xfree86/os-support/shared/vidmem.c
new file mode 100644
index 000000000..237d47a4d
--- /dev/null
+++ b/nx-X11/programs/Xserver/hw/xfree86/os-support/shared/vidmem.c
@@ -0,0 +1,300 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/shared/vidmem.c,v 1.17 2003/08/24 17:37:06 dawes Exp $ */
+/*
+ * Copyright (c) 1993-2003 by The XFree86 Project, Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Except as contained in this notice, the name of the copyright holder(s)
+ * and author(s) shall not be used in advertising or otherwise to promote
+ * the sale, use or other dealings in this Software without prior written
+ * authorization from the copyright holder(s) and author(s).
+ */
+
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#ifdef __UNIXOS2__
+# define I_NEED_OS2_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"
+
+/*
+ * This file contains the common part of the video memory mapping functions
+ */
+
+/*
+ * Get a piece of the ScrnInfoRec.  At the moment, this is only used to hold
+ * the MTRR option information, but it is likely to be expanded if we do
+ * auto unmapping of memory at VT switch.
+ *
+ */
+
+typedef struct {
+	unsigned long 	physBase;
+	unsigned long 	size;
+	pointer		virtBase;
+	pointer 	mtrrInfo;
+	int		flags;
+} MappingRec, *MappingPtr;
+	
+typedef struct {
+	int		numMappings;
+	MappingPtr *	mappings;
+	Bool		mtrrEnabled;
+	MessageType	mtrrFrom;
+	Bool		mtrrOptChecked;
+	ScrnInfoPtr	pScrn;
+} VidMapRec, *VidMapPtr;
+
+static int vidMapIndex = -1;
+
+#define VIDMAPPTR(p) ((VidMapPtr)((p)->privates[vidMapIndex].ptr))
+
+static VidMemInfo vidMemInfo = {FALSE, };
+static VidMapRec  vidMapRec  = {0, NULL, TRUE, X_DEFAULT, FALSE, NULL};
+
+static VidMapPtr
+getVidMapRec(int scrnIndex)
+{
+	VidMapPtr vp;
+	ScrnInfoPtr pScrn;
+
+	if ((scrnIndex < 0) ||
+	    !(pScrn = xf86Screens[scrnIndex]))
+		return &vidMapRec;
+
+	if (vidMapIndex < 0)
+		vidMapIndex = xf86AllocateScrnInfoPrivateIndex();
+
+	if (VIDMAPPTR(pScrn) != NULL)
+		return VIDMAPPTR(pScrn);
+
+	vp = pScrn->privates[vidMapIndex].ptr = xnfcalloc(sizeof(VidMapRec), 1);
+	vp->mtrrEnabled = TRUE;	/* default to enabled */
+	vp->mtrrFrom = X_DEFAULT;
+	vp->mtrrOptChecked = FALSE;
+	vp->pScrn = pScrn;
+	return vp;
+}
+
+static MappingPtr
+newMapping(VidMapPtr vp)
+{
+	vp->mappings = xnfrealloc(vp->mappings, sizeof(MappingPtr) *
+				  (vp->numMappings + 1));
+	vp->mappings[vp->numMappings] = xnfcalloc(sizeof(MappingRec), 1);
+	return vp->mappings[vp->numMappings++];
+}
+
+static MappingPtr
+findMapping(VidMapPtr vp, pointer vbase, unsigned long size)
+{
+	int i;
+
+	for (i = 0; i < vp->numMappings; i++) {
+		if (vp->mappings[i]->virtBase == vbase &&
+		    vp->mappings[i]->size == size)
+			return vp->mappings[i];
+	}
+	return NULL;
+}
+
+static void
+removeMapping(VidMapPtr vp, MappingPtr mp)
+{
+	int i, found = 0;
+
+	for (i = 0; i < vp->numMappings; i++) {
+		if (vp->mappings[i] == mp) {
+			found = 1;
+			xfree(vp->mappings[i]);
+		} else if (found) {
+			vp->mappings[i - 1] = vp->mappings[i];
+		}
+	}
+	vp->numMappings--;
+	vp->mappings[vp->numMappings] = NULL;
+}
+
+enum { OPTION_MTRR };
+static const OptionInfoRec opts[] =
+{
+	{ OPTION_MTRR, "mtrr", OPTV_BOOLEAN, {0}, FALSE },
+	{ -1, NULL, OPTV_NONE, {0}, FALSE }
+};
+
+static void
+checkMtrrOption(VidMapPtr vp)
+{
+	if (!vp->mtrrOptChecked && vp->pScrn && vp->pScrn->options != NULL) {
+		OptionInfoPtr options;
+
+		options = xnfalloc(sizeof(opts));
+		(void)memcpy(options, opts, sizeof(opts));
+		xf86ProcessOptions(vp->pScrn->scrnIndex, vp->pScrn->options,
+					options);
+		if (xf86GetOptValBool(options, OPTION_MTRR, &vp->mtrrEnabled))
+			vp->mtrrFrom = X_CONFIG;
+		xfree(options);
+		vp->mtrrOptChecked = TRUE;
+	}
+}
+
+void
+xf86MakeNewMapping(int ScreenNum, int Flags, unsigned long Base, unsigned long Size, pointer Vbase)
+{
+	VidMapPtr vp;
+	MappingPtr mp;
+
+	vp = getVidMapRec(ScreenNum);
+	mp = newMapping(vp);
+	mp->physBase = Base;
+	mp->size = Size;
+	mp->virtBase = Vbase;
+	mp->flags = Flags;
+}
+
+void
+xf86InitVidMem(void)
+{
+	if (!vidMemInfo.initialised) {
+		memset(&vidMemInfo, 0, sizeof(VidMemInfo));
+		xf86OSInitVidMem(&vidMemInfo);
+	}
+}
+
+pointer
+xf86MapVidMem(int ScreenNum, int Flags, unsigned long Base, unsigned long Size)
+{
+	pointer vbase = NULL;
+	VidMapPtr vp;
+	MappingPtr mp;
+
+	if (((Flags & VIDMEM_FRAMEBUFFER) &&
+	     (Flags & (VIDMEM_MMIO | VIDMEM_MMIO_32BIT))))
+	    FatalError("Mapping memory with more than one type\n");
+	    
+	xf86InitVidMem();
+	if (!vidMemInfo.initialised || !vidMemInfo.mapMem)
+		return NULL;
+
+	vbase = vidMemInfo.mapMem(ScreenNum, Base, Size, Flags);
+
+	if (!vbase || vbase == (pointer)-1)
+		return NULL;
+
+	vp = getVidMapRec(ScreenNum);
+	mp = newMapping(vp);
+	mp->physBase = Base;
+	mp->size = Size;
+	mp->virtBase = vbase;
+	mp->flags = Flags;
+
+	/*
+	 * Check the "mtrr" option even when MTRR isn't supported to avoid
+	 * warnings about unrecognised options.
+	 */
+	checkMtrrOption(vp);
+
+	if (vp->mtrrEnabled && vidMemInfo.setWC) {
+		if (Flags & (VIDMEM_MMIO | VIDMEM_MMIO_32BIT))
+			mp->mtrrInfo =
+				vidMemInfo.setWC(ScreenNum, Base, Size, FALSE,
+						 vp->mtrrFrom);
+		else if (Flags & VIDMEM_FRAMEBUFFER)
+			mp->mtrrInfo =
+				vidMemInfo.setWC(ScreenNum, Base, Size, TRUE,
+						 vp->mtrrFrom);
+	}
+	return vbase;
+}
+
+void
+xf86UnMapVidMem(int ScreenNum, pointer Base, unsigned long Size)
+{
+	VidMapPtr vp;
+	MappingPtr mp;
+
+	if (!vidMemInfo.initialised || !vidMemInfo.unmapMem) {
+		xf86DrvMsg(ScreenNum, X_WARNING,
+		  "xf86UnMapVidMem() called before xf86MapVidMem()\n");
+		return;
+	}
+
+	vp = getVidMapRec(ScreenNum);
+	mp = findMapping(vp, Base, Size);
+	if (!mp) {
+		xf86DrvMsg(ScreenNum, X_WARNING,
+		  "xf86UnMapVidMem: cannot find region for [%p,0x%lx]\n",
+		  Base, Size);
+		return;
+	}
+	if (vp->mtrrEnabled && vidMemInfo.undoWC && mp)
+		vidMemInfo.undoWC(ScreenNum, mp->mtrrInfo);
+
+	vidMemInfo.unmapMem(ScreenNum, Base, Size);
+	removeMapping(vp, mp);
+}
+
+Bool
+xf86CheckMTRR(int ScreenNum)
+{
+	VidMapPtr vp = getVidMapRec(ScreenNum);
+
+	/*
+	 * Check the "mtrr" option even when MTRR isn't supported to avoid
+	 * warnings about unrecognised options.
+	 */
+	checkMtrrOption(vp);
+
+	if (vp->mtrrEnabled && vidMemInfo.setWC)
+		return TRUE;
+		
+	return FALSE;
+}
+
+Bool
+xf86LinearVidMem()
+{
+	xf86InitVidMem();
+	return vidMemInfo.linearSupported;
+}
+
+void
+xf86MapReadSideEffects(int ScreenNum, int Flags, pointer base,
+			unsigned long Size)
+{
+	if (!(Flags & VIDMEM_READSIDEEFFECT))
+		return;
+
+	if (!vidMemInfo.initialised || !vidMemInfo.readSideEffects)
+		return;
+
+	vidMemInfo.readSideEffects(ScreenNum, base, Size);
+}
+