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9db2af6f75
This API sucks. Fortunately it's mostly unused at this point. geode, sis, and xgi need minor patches to use the corresponding pciaccess code, neomagic will (more explicitly) lose its non-PCI support, and newport will need to be ported to /dev/mem or the platform bus or something. This should also make it pretty clear that alpha's sparse memory support was basically not a thing anymore, very few tears shed. Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Adam Jackson <ajax@redhat.com>
143 lines
4 KiB
C
143 lines
4 KiB
C
/*
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* Copyright (c) 1993-2003 by The XFree86 Project, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the copyright holder(s)
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* and author(s) shall not be used in advertising or otherwise to promote
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* the sale, use or other dealings in this Software without prior written
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* authorization from the copyright holder(s) and author(s).
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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 <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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/*
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* This file contains the common part of the video memory mapping functions
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*/
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/*
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* Get a piece of the ScrnInfoRec. At the moment, this is only used to hold
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* the MTRR option information, but it is likely to be expanded if we do
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* auto unmapping of memory at VT switch.
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*
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*/
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typedef struct {
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Bool mtrrEnabled;
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MessageType mtrrFrom;
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Bool mtrrOptChecked;
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ScrnInfoPtr pScrn;
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} VidMapRec, *VidMapPtr;
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static int vidMapIndex = -1;
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#define VIDMAPPTR(p) ((VidMapPtr)((p)->privates[vidMapIndex].ptr))
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static VidMemInfo vidMemInfo = { FALSE, };
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static VidMapRec vidMapRec = { TRUE, X_DEFAULT, FALSE, NULL };
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static VidMapPtr
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getVidMapRec(int scrnIndex)
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{
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VidMapPtr vp;
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ScrnInfoPtr pScrn;
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if ((scrnIndex < 0) || !(pScrn = xf86Screens[scrnIndex]))
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return &vidMapRec;
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if (vidMapIndex < 0)
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vidMapIndex = xf86AllocateScrnInfoPrivateIndex();
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if (VIDMAPPTR(pScrn) != NULL)
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return VIDMAPPTR(pScrn);
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vp = pScrn->privates[vidMapIndex].ptr = xnfcalloc(sizeof(VidMapRec), 1);
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vp->mtrrEnabled = TRUE; /* default to enabled */
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vp->mtrrFrom = X_DEFAULT;
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vp->mtrrOptChecked = FALSE;
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vp->pScrn = pScrn;
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return vp;
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}
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enum { OPTION_MTRR };
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static const OptionInfoRec opts[] = {
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{OPTION_MTRR, "mtrr", OPTV_BOOLEAN, {0}, FALSE},
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{-1, NULL, OPTV_NONE, {0}, FALSE}
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};
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static void
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checkMtrrOption(VidMapPtr vp)
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{
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if (!vp->mtrrOptChecked && vp->pScrn && vp->pScrn->options != NULL) {
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OptionInfoPtr options;
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options = xnfalloc(sizeof(opts));
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(void) memcpy(options, opts, sizeof(opts));
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xf86ProcessOptions(vp->pScrn->scrnIndex, vp->pScrn->options, options);
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if (xf86GetOptValBool(options, OPTION_MTRR, &vp->mtrrEnabled))
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vp->mtrrFrom = X_CONFIG;
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free(options);
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vp->mtrrOptChecked = TRUE;
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}
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}
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void
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xf86InitVidMem(void)
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{
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if (!vidMemInfo.initialised) {
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memset(&vidMemInfo, 0, sizeof(VidMemInfo));
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xf86OSInitVidMem(&vidMemInfo);
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}
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}
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Bool
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xf86CheckMTRR(int ScreenNum)
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{
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VidMapPtr vp = getVidMapRec(ScreenNum);
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/*
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* Check the "mtrr" option even when MTRR isn't supported to avoid
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* warnings about unrecognised options.
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*/
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checkMtrrOption(vp);
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if (vp->mtrrEnabled && vidMemInfo.setWC)
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return TRUE;
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return FALSE;
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}
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Bool
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xf86LinearVidMem(void)
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{
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xf86InitVidMem();
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return vidMemInfo.linearSupported;
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}
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