path: root/hw/xfree86/common/xf86Init.c

/*
 * Loosely based on code bearing the following copyright:
 *
 *   Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
 */
/*
 * Copyright (c) 1992-2003 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

#include <stdlib.h>
#include <errno.h>

#undef HAS_UTSNAME
#if !defined(WIN32)
#define HAS_UTSNAME 1
#include <sys/utsname.h>
#endif

#define NEED_EVENTS
#include <X11/X.h>
#include <X11/Xmd.h>
#include <X11/Xproto.h>
#include <X11/Xatom.h>
#include "input.h"
#include "servermd.h"
#include "windowstr.h"
#include "scrnintstr.h"
#include "site.h"
#include "mi.h"

#include "compiler.h"

#include "loaderProcs.h"
#ifdef XFreeXDGA
#include "dgaproc.h"
#endif

#define XF86_OS_PRIVS
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86Config.h"
#include "xf86_OSlib.h"
#include "xorgVersion.h"
#include "xf86Date.h"
#include "xf86Build.h"
#include "mipointer.h"
#include <X11/extensions/XI.h>
#include <X11/extensions/XIproto.h>
#include "xf86DDC.h"
#include "xf86Xinput.h"
#include "xf86InPriv.h"
#ifdef RENDER
#include "picturestr.h"
#endif

#include "globals.h"

#ifdef DPMSExtension
#define DPMS_SERVER
#include <X11/extensions/dpms.h>
#include "dpmsproc.h"
#endif

#include <pciaccess.h>
#include "Pci.h"
#include "xf86Bus.h"

/* forward declarations */
static Bool probe_devices_from_device_sections(DriverPtr drvp);
static Bool add_matching_devices_to_configure_list(DriverPtr drvp);
static Bool check_for_matching_devices(DriverPtr drvp);

#ifdef XF86PM
void (*xf86OSPMClose)(void) = NULL;
#endif

/* Common pixmap formats */

static PixmapFormatRec formats[MAXFORMATS] = {
	{ 1,	1,	BITMAP_SCANLINE_PAD },
	{ 4,	8,	BITMAP_SCANLINE_PAD },
	{ 8,	8,	BITMAP_SCANLINE_PAD },
	{ 15,	16,	BITMAP_SCANLINE_PAD },
	{ 16,	16,	BITMAP_SCANLINE_PAD },
	{ 24,	32,	BITMAP_SCANLINE_PAD },
#ifdef RENDER
	{ 32,	32,	BITMAP_SCANLINE_PAD },
#endif
};
#ifdef RENDER
static int numFormats = 7;
#else
static int numFormats = 6;
#endif
static Bool formatsDone = FALSE;

#ifndef OSNAME
#define OSNAME " unknown"
#endif
#ifndef OSVENDOR
#define OSVENDOR ""
#endif
#ifndef PRE_RELEASE
#define PRE_RELEASE XORG_VERSION_SNAP
#endif

static void
xf86PrintBanner()
{
#if PRE_RELEASE
  ErrorF("\n"
    "This is a pre-release version of the X server from " XVENDORNAME ".\n"
    "It is not supported in any way.\n"
    "Bugs may be filed in the bugzilla at http://bugs.freedesktop.org/.\n"
    "Select the \"xorg\" product for bugs you find in this release.\n"
    "Before reporting bugs in pre-release versions please check the\n"
    "latest version in the X.Org Foundation git repository.\n"
    "See http://wiki.x.org/wiki/GitPage for git access instructions.\n");
#endif
  ErrorF("\nX.Org X Server %d.%d.%d",
	 XORG_VERSION_MAJOR,
	 XORG_VERSION_MINOR,
	 XORG_VERSION_PATCH);
#if XORG_VERSION_SNAP > 0
  ErrorF(".%d", XORG_VERSION_SNAP);
#endif

#if XORG_VERSION_SNAP >= 900
  /* When the minor number is 99, that signifies that the we are making
   * a release candidate for a major version.  (X.0.0)
   * When the patch number is 99, that signifies that the we are making
   * a release candidate for a minor version.  (X.Y.0)
   * When the patch number is < 99, then we are making a release
   * candidate for the next point release.  (X.Y.Z)
   */
#if XORG_VERSION_MINOR >= 99
  ErrorF(" (%d.0.0 RC %d)", XORG_VERSION_MAJOR+1, XORG_VERSION_SNAP - 900);
#elif XORG_VERSION_PATCH == 99
  ErrorF(" (%d.%d.0 RC %d)", XORG_VERSION_MAJOR, XORG_VERSION_MINOR + 1,
				XORG_VERSION_SNAP - 900);
#else
  ErrorF(" (%d.%d.%d RC %d)", XORG_VERSION_MAJOR, XORG_VERSION_MINOR,
 			 XORG_VERSION_PATCH + 1, XORG_VERSION_SNAP - 900);
#endif
#endif

#ifdef XORG_CUSTOM_VERSION
  ErrorF(" (%s)", XORG_CUSTOM_VERSION);
#endif
#ifndef XORG_DATE
#define XORG_DATE XF86_DATE
#endif
  ErrorF("\nRelease Date: %s\n", XORG_DATE);
  ErrorF("X Protocol Version %d, Revision %d\n",
         X_PROTOCOL, X_PROTOCOL_REVISION);
  ErrorF("Build Operating System: %s %s\n", OSNAME, OSVENDOR);
#ifdef HAS_UTSNAME
  {
    struct utsname name;

    /* Linux & BSD state that 0 is success, SysV (including Solaris, HP-UX,
       and Irix) and Single Unix Spec 3 just say that non-negative is success.
       All agree that failure is represented by a negative number.
     */
    if (uname(&name) >= 0) {
      ErrorF("Current Operating System: %s %s %s %s %s\n",
	name.sysname, name.nodename, name.release, name.version, name.machine);
    }
  }
#endif
#if defined(BUILD_DATE) && (BUILD_DATE > 19000000)
  {
    struct tm t;
    char buf[100];

    bzero(&t, sizeof(t));
    bzero(buf, sizeof(buf));
    t.tm_mday = BUILD_DATE % 100;
    t.tm_mon = (BUILD_DATE / 100) % 100 - 1;
    t.tm_year = BUILD_DATE / 10000 - 1900;
#if defined(BUILD_TIME)
    t.tm_sec = BUILD_TIME % 100;
    t.tm_min = (BUILD_TIME / 100) % 100;
    t.tm_hour = (BUILD_TIME / 10000) % 100;
    if (strftime(buf, sizeof(buf), "%d %B %Y  %I:%M:%S%p", &t))
       ErrorF("Build Date: %s\n", buf);
#else
    if (strftime(buf, sizeof(buf), "%d %B %Y", &t))
       ErrorF("Build Date: %s\n", buf);
#endif
  }
#endif
#if defined(CLOG_DATE) && (CLOG_DATE > 19000000)
  {
    struct tm t;
    char buf[100];

    bzero(&t, sizeof(t));
    bzero(buf, sizeof(buf));
    t.tm_mday = CLOG_DATE % 100;
    t.tm_mon = (CLOG_DATE / 100) % 100 - 1;
    t.tm_year = CLOG_DATE / 10000 - 1900;
    if (strftime(buf, sizeof(buf), "%d %B %Y", &t))
       ErrorF("Changelog Date: %s\n", buf);
  }
#endif
#if defined(BUILDERSTRING)
  ErrorF("%s \n",BUILDERSTRING);
#endif
  ErrorF("\tBefore reporting problems, check "__VENDORDWEBSUPPORT__"\n"
	 "\tto make sure that you have the latest version.\n");
  ErrorF("Module Loader present\n");
}

static void
xf86PrintMarkers()
{
  LogPrintMarkers();
}

static Bool
xf86CreateRootWindow(WindowPtr pWin)
{
  int ret = TRUE;
  int err = Success;
  ScreenPtr pScreen = pWin->drawable.pScreen;
  RootWinPropPtr pProp;
  CreateWindowProcPtr CreateWindow = (CreateWindowProcPtr)
      dixLookupPrivate(&pScreen->devPrivates, xf86CreateRootWindowKey);

#ifdef DEBUG
  ErrorF("xf86CreateRootWindow(%p)\n", pWin);
#endif

  if ( pScreen->CreateWindow != xf86CreateRootWindow ) {
    /* Can't find hook we are hung on */
	xf86DrvMsg(pScreen->myNum, X_WARNING /* X_ERROR */,
		  "xf86CreateRootWindow %p called when not in pScreen->CreateWindow %p n",
		   (void *)xf86CreateRootWindow,
		   (void *)pScreen->CreateWindow );
  }

  /* Unhook this function ... */
  pScreen->CreateWindow = CreateWindow;
  dixSetPrivate(&pScreen->devPrivates, xf86CreateRootWindowKey, NULL);

  /* ... and call the previous CreateWindow fuction, if any */
  if (NULL!=pScreen->CreateWindow) {
    ret = (*pScreen->CreateWindow)(pWin);
  }

  /* Now do our stuff */
  if (xf86RegisteredPropertiesTable != NULL) {
    if (pWin->parent == NULL && xf86RegisteredPropertiesTable != NULL) {
      for (pProp = xf86RegisteredPropertiesTable[pScreen->myNum];
	   pProp != NULL && err==Success;
	   pProp = pProp->next )
	{
	  Atom prop;

	  prop = MakeAtom(pProp->name, strlen(pProp->name), TRUE);
	  err = dixChangeWindowProperty(serverClient, pWin,
					prop, pProp->type,
					pProp->format, PropModeReplace,
					pProp->size, pProp->data,
					FALSE);
	}

      /* Look at err */
      ret &= (err==Success);

    } else {
      xf86Msg(X_ERROR, "xf86CreateRootWindow unexpectedly called with "
	      "non-root window %p (parent %p)\n",
	      (void *)pWin, (void *)pWin->parent);
      ret = FALSE;
    }
  }

#ifdef DEBUG
  ErrorF("xf86CreateRootWindow() returns %d\n", ret);
#endif
  return (ret);
}


static void
InstallSignalHandlers(void)
{
    /*
     * Install signal handler for unexpected signals
     */
    xf86Info.caughtSignal=FALSE;
    if (!xf86Info.notrapSignals) {
       signal(SIGSEGV,xf86SigHandler);
       signal(SIGILL,xf86SigHandler);
#ifdef SIGEMT
       signal(SIGEMT,xf86SigHandler);
#endif
       signal(SIGFPE,xf86SigHandler);
#ifdef SIGBUS
       signal(SIGBUS,xf86SigHandler);
#endif
#ifdef SIGSYS
       signal(SIGSYS,xf86SigHandler);
#endif
#ifdef SIGXCPU
       signal(SIGXCPU,xf86SigHandler);
#endif
#ifdef SIGXFSZ
       signal(SIGXFSZ,xf86SigHandler);
#endif
    }
}


#define END_OF_MATCHES(m) \
    (((m).vendor_id == 0) && ((m).device_id == 0) && ((m).subvendor_id == 0))

Bool
probe_devices_from_device_sections(DriverPtr drvp)
{
    int i, j;
    struct pci_device * pPci;
    Bool foundScreen = FALSE;
    const struct pci_id_match * const devices = drvp->supported_devices;
    GDevPtr *devList;
    const unsigned numDevs = xf86MatchDevice(drvp->driverName, & devList);


    for ( i = 0 ; i < numDevs ; i++ ) {
	struct pci_device_iterator *iter;
	unsigned device_id;


	/* Find the pciVideoRec associated with this device section.
	 */
	iter = pci_id_match_iterator_create(NULL);
	while ((pPci = pci_device_next(iter)) != NULL) {
	    if (devList[i]->busID && *devList[i]->busID) {
		if (xf86ComparePciBusString(devList[i]->busID,
					    ((pPci->domain << 8)
					     | pPci->bus),
					    pPci->dev,
					    pPci->func)) {
		    break;
		}
	    }
	    else if (xf86IsPrimaryPci(pPci)) {
		break;
	    }
	}

	pci_iterator_destroy(iter);

	if (pPci == NULL) {
	    continue;
	}

	device_id = (devList[i]->chipID > 0)
	  ? devList[i]->chipID : pPci->device_id;


	/* Once the pciVideoRec is found, determine if the device is supported
	 * by the driver.  If it is, probe it!
	 */
	for ( j = 0 ; ! END_OF_MATCHES( devices[j] ) ; j++ ) {
	    if ( PCI_ID_COMPARE( devices[j].vendor_id, pPci->vendor_id )
		 && PCI_ID_COMPARE( devices[j].device_id, device_id )
		 && ((devices[j].device_class_mask & pPci->device_class)
		      == devices[j].device_class) ) {
		int  entry;

		/* Allow the same entity to be used more than once for
		 * devices with multiple screens per entity.  This assumes
		 * implicitly that there will be a screen == 0 instance.
		 *
		 * FIXME Need to make sure that two different drivers don't
		 * FIXME claim the same screen > 0 instance.
		 */
		if ( (devList[i]->screen == 0) && !xf86CheckPciSlot( pPci ) )
		  continue;

#ifdef DEBUG
		ErrorF("%s: card at %d:%d:%d is claimed by a Device section\n",
		       drvp->driverName, pPci->bus, pPci->dev, pPci->func);
#endif

		/* Allocate an entry in the lists to be returned */
		entry = xf86ClaimPciSlot(pPci, drvp, device_id,
					  devList[i], devList[i]->active);

		if ((entry == -1) && (devList[i]->screen > 0)) {
		    unsigned k;

		    for ( k = 0; k < xf86NumEntities; k++ ) {
			EntityPtr pEnt = xf86Entities[k];
			if (pEnt->busType != BUS_PCI)
			  continue;

			if (pEnt->bus.id.pci == pPci) {
			    entry = k;
			    xf86AddDevToEntity(k, devList[i]);
			    break;
			}
		    }
		}

		if (entry != -1) {
		    if ((*drvp->PciProbe)(drvp, entry, pPci,
					  devices[j].match_data)) {
			foundScreen = TRUE;
		    }
		}

		break;
	    }
	}
    }


    return foundScreen;
}


Bool
add_matching_devices_to_configure_list(DriverPtr drvp)
{
    const struct pci_id_match * const devices = drvp->supported_devices;
    int j;
    struct pci_device *pPci;
    struct pci_device_iterator *iter;
    int numFound = 0;


    iter = pci_id_match_iterator_create(NULL);
    while ((pPci = pci_device_next(iter)) != NULL) {
	/* Determine if this device is supported by the driver.  If it is,
	 * add it to the list of devices to configure.
	 */
	for (j = 0 ; ! END_OF_MATCHES(devices[j]) ; j++) {
	    if ( PCI_ID_COMPARE( devices[j].vendor_id, pPci->vendor_id )
		 && PCI_ID_COMPARE( devices[j].device_id, pPci->device_id )
		 && ((devices[j].device_class_mask & pPci->device_class)
		     == devices[j].device_class) ) {
		if (xf86CheckPciSlot(pPci)) {
		    GDevPtr pGDev =
		      xf86AddDeviceToConfigure(drvp->driverName, pPci, -1);
		    if (pGDev != NULL) {
			/* After configure pass 1, chipID and chipRev are
			 * treated as over-rides, so clobber them here.
			 */
			pGDev->chipID = -1;
			pGDev->chipRev = -1;
		    }

		    numFound++;
		}

		break;
	    }
	}
    }

    pci_iterator_destroy(iter);


    return (numFound != 0);
}


Bool
check_for_matching_devices(DriverPtr drvp)
{
    const struct pci_id_match * const devices = drvp->supported_devices;
    int j;


    for (j = 0; ! END_OF_MATCHES(devices[j]); j++) {
	struct pci_device_iterator *iter;
	struct pci_device *dev;

	iter = pci_id_match_iterator_create(& devices[j]);
	dev = pci_device_next(iter);
	pci_iterator_destroy(iter);

	if (dev != NULL) {
	    return TRUE;
	}
    }


    return FALSE;
}


/**
 * Call the driver's correct probe function.
 *
 * If the driver implements the \c DriverRec::PciProbe entry-point and an
 * appropriate PCI device (with matching Device section in the xorg.conf file)
 * is found, it is called.  If \c DriverRec::PciProbe or no devices can be
 * successfully probed with it (e.g., only non-PCI devices are available),
 * the driver's \c DriverRec::Probe function is called.
 *
 * \param drv   Driver to probe
 *
 * \return
 * If a device can be successfully probed by the driver, \c TRUE is
 * returned.  Otherwise, \c FALSE is returned.
 */
Bool
xf86CallDriverProbe( DriverPtr drv, Bool detect_only )
{
    Bool     foundScreen = FALSE;

    if ( drv->PciProbe != NULL ) {
	if ( xf86DoProbe ) {
	    assert( detect_only );
	    foundScreen = check_for_matching_devices( drv );
	}
	else if ( xf86DoConfigure && xf86DoConfigurePass1 ) {
	    assert( detect_only );
	    foundScreen = add_matching_devices_to_configure_list( drv );
	}
	else {
	    assert( ! detect_only );
	    foundScreen = probe_devices_from_device_sections( drv );
	}
    }

    if ( ! foundScreen && (drv->Probe != NULL) ) {
	xf86Msg( X_WARNING, "Falling back to old probe method for %s\n",
		 drv->driverName );
	foundScreen = (*drv->Probe)( drv, (detect_only) ? PROBE_DETECT
				     : PROBE_DEFAULT );
    }

    return foundScreen;
}


/*
 * InitOutput --
 *	Initialize screenInfo for all actually accessible framebuffers.
 *      That includes vt-manager setup, querying all possible devices and
 *      collecting the pixmap formats.
 */
void
InitOutput(ScreenInfo *pScreenInfo, int argc, char **argv)
{
  int                    i, j, k, scr_index;
  char                   **modulelist;
  pointer                *optionlist;
  screenLayoutPtr	 layout;
  Pix24Flags		 screenpix24, pix24;
  MessageType		 pix24From = X_DEFAULT;
  Bool			 pix24Fail = FALSE;
  Bool			 autoconfig = FALSE;
  GDevPtr		 configured_device;

  xf86Initialising = TRUE;

  if (serverGeneration == 1) {

    pScreenInfo->numScreens = 0;

    if ((xf86ServerName = strrchr(argv[0], '/')) != 0)
      xf86ServerName++;
    else
      xf86ServerName = argv[0];

    xf86PrintBanner();
    xf86PrintMarkers();
    if (xf86LogFile)  {
	time_t t;
	const char *ct;
	t = time(NULL);
	ct = ctime(&t);
	xf86MsgVerb(xf86LogFileFrom, 0, "Log file: \"%s\", Time: %s",
		    xf86LogFile, ct);
    }

    /* Read and parse the config file */
    if (!xf86DoProbe && !xf86DoConfigure) {
      switch (xf86HandleConfigFile(FALSE)) {
      case CONFIG_OK:
	break;
      case CONFIG_PARSE_ERROR:
	xf86Msg(X_ERROR, "Error parsing the config file\n");
	return;
      case CONFIG_NOFILE:
	autoconfig = TRUE;
	break;
      }
    }

    InstallSignalHandlers();

    /* Initialise the loader */
    LoaderInit();

    /* Tell the loader the default module search path */
    LoaderSetPath(xf86ModulePath);

    if (xf86Info.ignoreABI) {
        LoaderSetOptions(LDR_OPT_ABI_MISMATCH_NONFATAL);
    }

    xf86OpenConsole();

    /* Do a general bus probe.  This will be a PCI probe for x86 platforms */
    xf86BusProbe();

    if (xf86DoProbe)
	DoProbe();

    if (xf86DoConfigure)
	DoConfigure();

    if (autoconfig) {
	if (!xf86AutoConfig()) {
	    xf86Msg(X_ERROR, "Auto configuration failed\n");
	    return;
	}
    }

#ifdef XF86PM
    xf86OSPMClose = xf86OSPMOpen();
#endif

    /* Initialise the resource broker */
    xf86ResourceBrokerInit();

    /* Load all modules specified explicitly in the config file */
    if ((modulelist = xf86ModulelistFromConfig(&optionlist))) {
      xf86LoadModules(modulelist, optionlist);
      xfree(modulelist);
      xfree(optionlist);
    }

    /* Load all driver modules specified in the config file */
    /* If there aren't any specified in the config file, autoconfig them */
    /* FIXME: Does not handle multiple active screen sections, but I'm not
     * sure if we really want to handle that case*/
    configured_device = xf86ConfigLayout.screens->screen->device;
    if ((!configured_device) || (!configured_device->driver)) {
        if (!autoConfigDevice(configured_device)) {
            xf86Msg(X_ERROR, "Automatic driver configuration failed\n");
            return ;
        }
    }
    if ((modulelist = xf86DriverlistFromConfig())) {
      xf86LoadModules(modulelist, NULL);
      xfree(modulelist);
    }

    /* Load all input driver modules specified in the config file. */
    if ((modulelist = xf86InputDriverlistFromConfig())) {
      xf86LoadModules(modulelist, NULL);
      xfree(modulelist);
    }

    /*
     * It is expected that xf86AddDriver()/xf86AddInputDriver will be
     * called for each driver as it is loaded.  Those functions save the
     * module pointers for drivers.
     * XXX Nothing keeps track of them for other modules.
     */
    /* XXX What do we do if not all of these could be loaded? */

    /*
     * At this point, xf86DriverList[] is all filled in with entries for
     * each of the drivers to try and xf86NumDrivers has the number of
     * drivers.  If there are none, return now.
     */

    if (xf86NumDrivers == 0) {
      xf86Msg(X_ERROR, "No drivers available.\n");
      return;
    }

    /*
     * Call each of the Identify functions and call the driverFunc to check
     * if HW access is required.  The Identify functions print out some
     * identifying information, and anything else that might be
     * needed at this early stage.
     */

    for (i = 0; i < xf86NumDrivers; i++) {
	xorgHWFlags flags;

	if (xf86DriverList[i]->Identify != NULL)
	    xf86DriverList[i]->Identify(0);

	if (!xorgHWAccess
	    && (!xf86DriverList[i]->driverFunc
		|| !xf86DriverList[i]->driverFunc(NULL,
						  GET_REQUIRED_HW_INTERFACES,
						  &flags)
		|| NEED_IO_ENABLED(flags)))
	    xorgHWAccess = TRUE;
    }

    /* Enable full I/O access */
    if (xorgHWAccess)
	xorgHWAccess = xf86EnableIO();

    /*
     * Locate bus slot that had register IO enabled at server startup
     */
    if (xorgHWAccess) {
        xf86AccessInit();
        xf86FindPrimaryDevice();
    }
    /*
     * Now call each of the Probe functions.  Each successful probe will
     * result in an extra entry added to the xf86Screens[] list for each
     * instance of the hardware found.
     */

    for (i = 0; i < xf86NumDrivers; i++) {
	xorgHWFlags flags;
	if (!xorgHWAccess) {
	    if (!xf86DriverList[i]->driverFunc
		|| !xf86DriverList[i]->driverFunc(NULL,
						 GET_REQUIRED_HW_INTERFACES,
						  &flags)
		|| NEED_IO_ENABLED(flags))
		continue;
	}

	xf86CallDriverProbe( xf86DriverList[i], FALSE );
    }

    /*
     * If nothing was detected, return now.
     */

    if (xf86NumScreens == 0) {
      xf86Msg(X_ERROR, "No devices detected.\n");
      return;
    }

    /*
     * Match up the screens found by the probes against those specified
     * in the config file.  Remove the ones that won't be used.  Sort
     * them in the order specified.
     */

    /*
     * What is the best way to do this?
     *
     * For now, go through the screens allocated by the probes, and
     * look for screen config entry which refers to the same device
     * section as picked out by the probe.
     *
     */

    for (i = 0; i < xf86NumScreens; i++) {
      for (layout = xf86ConfigLayout.screens; layout->screen != NULL;
	   layout++) {
	  Bool found = FALSE;
	  for (j = 0; j < xf86Screens[i]->numEntities; j++) {

	      GDevPtr dev =
		xf86GetDevFromEntity(xf86Screens[i]->entityList[j],
				     xf86Screens[i]->entityInstanceList[j]);

	      if (dev == layout->screen->device) {
		  /* A match has been found */
		  xf86Screens[i]->confScreen = layout->screen;
		  found = TRUE;
		  break;
	      }
	  }
	  if (found) break;
      }
      if (layout->screen == NULL) {
	/* No match found */
	xf86Msg(X_ERROR,
	    "Screen %d deleted because of no matching config section.\n", i);
        xf86DeleteScreen(i--, 0);
      }
    }

    /*
     * If no screens left, return now.
     */

    if (xf86NumScreens == 0) {
      xf86Msg(X_ERROR,
	      "Device(s) detected, but none match those in the config file.\n");
      return;
    }

    xf86PostProbe();
    xf86EntityInit();

    /*
     * Sort the drivers to match the requested ording.  Using a slow
     * bubble sort.
     */
    for (j = 0; j < xf86NumScreens - 1; j++) {
	for (i = 0; i < xf86NumScreens - j - 1; i++) {
	    if (xf86Screens[i + 1]->confScreen->screennum <
		xf86Screens[i]->confScreen->screennum) {
		ScrnInfoPtr tmpScrn = xf86Screens[i + 1];
		xf86Screens[i + 1] = xf86Screens[i];
		xf86Screens[i] = tmpScrn;
	    }
	}
    }
    /* Fix up the indexes */
    for (i = 0; i < xf86NumScreens; i++) {
	xf86Screens[i]->scrnIndex = i;
    }

    /*
     * Call the driver's PreInit()'s to complete initialisation for the first
     * generation.
     */

    for (i = 0; i < xf86NumScreens; i++) {
	xf86EnableAccess(xf86Screens[i]);
	if (xf86Screens[i]->PreInit &&
	    xf86Screens[i]->PreInit(xf86Screens[i], 0))
	    xf86Screens[i]->configured = TRUE;
    }
    for (i = 0; i < xf86NumScreens; i++)
	if (!xf86Screens[i]->configured)
	    xf86DeleteScreen(i--, 0);

    /*
     * If no screens left, return now.
     */

    if (xf86NumScreens == 0) {
      xf86Msg(X_ERROR,
	      "Screen(s) found, but none have a usable configuration.\n");
      return;
    }

    for (i = 0; i < xf86NumScreens; i++) {
      if (xf86Screens[i]->name == NULL) {
	xf86Screens[i]->name = xnfalloc(strlen("screen") + 10 + 1);
	sprintf(xf86Screens[i]->name, "screen%d", i);
	xf86MsgVerb(X_WARNING, 0,
		    "Screen driver %d has no name set, using `%s'.\n",
		    i, xf86Screens[i]->name);
      }
    }

    /* XXX Should this be before or after loading dependent modules? */
    if (xf86ProbeOnly)
    {
      OsCleanup(TRUE);
      AbortDDX();
      fflush(stderr);
      exit(0);
    }

    /* Remove (unload) drivers that are not required */
    for (i = 0; i < xf86NumDrivers; i++)
	if (xf86DriverList[i] && xf86DriverList[i]->refCount <= 0)
	    xf86DeleteDriver(i);

    /*
     * At this stage we know how many screens there are.
     */

    for (i = 0; i < xf86NumScreens; i++)
      xf86InitViewport(xf86Screens[i]);

    /*
     * Collect all pixmap formats and check for conflicts at the display
     * level.  Should we die here?  Or just delete the offending screens?
     * Also, should this be done for -probeonly?
     */
    screenpix24 = Pix24DontCare;
    for (i = 0; i < xf86NumScreens; i++) {
	if (xf86Screens[i]->imageByteOrder !=
	    xf86Screens[0]->imageByteOrder)
	    FatalError("Inconsistent display bitmapBitOrder.  Exiting\n");
	if (xf86Screens[i]->bitmapScanlinePad !=
	    xf86Screens[0]->bitmapScanlinePad)
	    FatalError("Inconsistent display bitmapScanlinePad.  Exiting\n");
	if (xf86Screens[i]->bitmapScanlineUnit !=
	    xf86Screens[0]->bitmapScanlineUnit)
	    FatalError("Inconsistent display bitmapScanlineUnit.  Exiting\n");
	if (xf86Screens[i]->bitmapBitOrder !=
	    xf86Screens[0]->bitmapBitOrder)
	    FatalError("Inconsistent display bitmapBitOrder.  Exiting\n");

	/* Determine the depth 24 pixmap format the screens would like */
	if (xf86Screens[i]->pixmap24 != Pix24DontCare) {
	    if (screenpix24 == Pix24DontCare)
		screenpix24 = xf86Screens[i]->pixmap24;
	    else if (screenpix24 != xf86Screens[i]->pixmap24)
		FatalError("Inconsistent depth 24 pixmap format.  Exiting\n");
	}
    }
    /* check if screenpix24 is consistent with the config/cmdline */
    if (xf86Info.pixmap24 != Pix24DontCare) {
	pix24 = xf86Info.pixmap24;
	pix24From = xf86Info.pix24From;
	if (screenpix24 != Pix24DontCare && screenpix24 != xf86Info.pixmap24)
	    pix24Fail = TRUE;
    } else if (screenpix24 != Pix24DontCare) {
	pix24 = screenpix24;
	pix24From = X_PROBED;
    } else
	pix24 = Pix24Use32;

    if (pix24Fail)
	FatalError("Screen(s) can't use the required depth 24 pixmap format"
		   " (%d).  Exiting\n", PIX24TOBPP(pix24));

    /* Initialise the depth 24 format */
    for (j = 0; j < numFormats && formats[j].depth != 24; j++)
	;
    formats[j].bitsPerPixel = PIX24TOBPP(pix24);

    /* Collect additional formats */
    for (i = 0; i < xf86NumScreens; i++) {
	for (j = 0; j < xf86Screens[i]->numFormats; j++) {
	    for (k = 0; ; k++) {
		if (k >= numFormats) {
		    if (k >= MAXFORMATS)
			FatalError("Too many pixmap formats!  Exiting\n");
		    formats[k] = xf86Screens[i]->formats[j];
		    numFormats++;
		    break;
		}
		if (formats[k].depth == xf86Screens[i]->formats[j].depth) {
		    if ((formats[k].bitsPerPixel ==
			 xf86Screens[i]->formats[j].bitsPerPixel) &&
		        (formats[k].scanlinePad ==
			 xf86Screens[i]->formats[j].scanlinePad))
			break;
		    FatalError("Inconsistent pixmap format for depth %d."
			       "  Exiting\n", formats[k].depth);
		}
	    }
	}
    }
    formatsDone = TRUE;

    if (xf86Info.vtno >= 0 ) {
#define VT_ATOM_NAME         "XFree86_VT"
      Atom VTAtom=-1;
      CARD32  *VT = NULL;
      int  ret;

      /* This memory needs to stay available until the screen has been
	 initialized, and we can create the property for real.
      */
      if ( (VT = xalloc(sizeof(CARD32)))==NULL ) {
	FatalError("Unable to make VT property - out of memory. Exiting...\n");
      }
      *VT = xf86Info.vtno;

      VTAtom = MakeAtom(VT_ATOM_NAME, sizeof(VT_ATOM_NAME) - 1, TRUE);

      for (i = 0, ret = Success; i < xf86NumScreens && ret == Success; i++) {
	ret = xf86RegisterRootWindowProperty(xf86Screens[i]->scrnIndex,
					     VTAtom, XA_INTEGER, 32,
					     1, VT );
	if (ret != Success)
	  xf86DrvMsg(xf86Screens[i]->scrnIndex, X_WARNING,
		     "Failed to register VT property\n");
      }
    }

    /* If a screen uses depth 24, show what the pixmap format is */
    for (i = 0; i < xf86NumScreens; i++) {
	if (xf86Screens[i]->depth == 24) {
	    xf86Msg(pix24From, "Depth 24 pixmap format is %d bpp\n",
		    PIX24TOBPP(pix24));
	    break;
	}
    }

    /* set up the proper access funcs */
    xf86PostPreInit();

  } else {
    /*
     * serverGeneration != 1; some OSs have to do things here, too.
     */
    xf86OpenConsole();

#ifdef XF86PM
    /*
      should we reopen it here? We need to deal with an already opened
      device. We could leave this to the OS layer. For now we simply
      close it here
    */
    if (xf86OSPMClose)
        xf86OSPMClose();
    if ((xf86OSPMClose = xf86OSPMOpen()) != NULL)
	xf86MsgVerb(X_INFO, 3, "APM registered successfully\n");
#endif

    /* Make sure full I/O access is enabled */
    if (xorgHWAccess)
	xf86EnableIO();
  }

  /*
   * Use the previously collected parts to setup pScreenInfo
   */

  pScreenInfo->imageByteOrder = xf86Screens[0]->imageByteOrder;
  pScreenInfo->bitmapScanlinePad = xf86Screens[0]->bitmapScanlinePad;
  pScreenInfo->bitmapScanlineUnit = xf86Screens[0]->bitmapScanlineUnit;
  pScreenInfo->bitmapBitOrder = xf86Screens[0]->bitmapBitOrder;
  pScreenInfo->numPixmapFormats = numFormats;
  for (i = 0; i < numFormats; i++)
    pScreenInfo->formats[i] = formats[i];

  /* Make sure the server's VT is active */

  if (serverGeneration != 1) {
    xf86Resetting = TRUE;
    /* All screens are in the same state, so just check the first */
    if (!xf86Screens[0]->vtSema) {
#ifdef HAS_USL_VTS
      ioctl(xf86Info.consoleFd, VT_RELDISP, VT_ACKACQ);
#endif
      xf86AccessEnter();
      xf86EnterServerState(SETUP);
    }
  }
#ifdef SCO325
  else {
    /*
     * Under SCO we must ack that we got the console at startup,
     * I think this is the safest way to assure it.
     */
    static int once = 1;
    if (once) {
      once = 0;
      if (ioctl(xf86Info.consoleFd, VT_RELDISP, VT_ACKACQ) < 0)
        xf86Msg(X_WARNING, "VT_ACKACQ failed");
    }
  }
#endif /* SCO325 */

  for (i = 0; i < xf86NumScreens; i++) {
	xf86EnableAccess(xf86Screens[i]);
	/*
	 * Almost everything uses these defaults, and many of those that
	 * don't, will wrap them.
	 */
	xf86Screens[i]->EnableDisableFBAccess = xf86EnableDisableFBAccess;
	xf86Screens[i]->SetDGAMode = xf86SetDGAMode;
	xf86Screens[i]->DPMSSet = NULL;
	xf86Screens[i]->LoadPalette = NULL;
	xf86Screens[i]->SetOverscan = NULL;
	xf86Screens[i]->DriverFunc = NULL;
	xf86Screens[i]->pScreen = NULL;
	scr_index = AddScreen(xf86Screens[i]->ScreenInit, argc, argv);
      if (scr_index == i) {
	/*
	 * Hook in our ScrnInfoRec, and initialise some other pScreen
	 * fields.
	 */
	dixSetPrivate(&screenInfo.screens[scr_index]->devPrivates,
		      xf86ScreenKey, xf86Screens[i]);
	xf86Screens[i]->pScreen = screenInfo.screens[scr_index];
	/* The driver should set this, but make sure it is set anyway */
	xf86Screens[i]->vtSema = TRUE;
      } else {
	/* This shouldn't normally happen */
	FatalError("AddScreen/ScreenInit failed for driver %d\n", i);
      }

#ifdef DEBUG
      ErrorF("InitOutput - xf86Screens[%d]->pScreen = %p\n",
	     i, xf86Screens[i]->pScreen );
      ErrorF("xf86Screens[%d]->pScreen->CreateWindow = %p\n",
	     i, xf86Screens[i]->pScreen->CreateWindow );
#endif

      dixSetPrivate(&screenInfo.screens[scr_index]->devPrivates,
		    xf86CreateRootWindowKey,
		    xf86Screens[i]->pScreen->CreateWindow);
      xf86Screens[i]->pScreen->CreateWindow = xf86CreateRootWindow;

#ifdef RENDER
    if (PictureGetSubpixelOrder (xf86Screens[i]->pScreen) == SubPixelUnknown)
    {
	xf86MonPtr DDC = (xf86MonPtr)(xf86Screens[i]->monitor->DDC);
	PictureSetSubpixelOrder (xf86Screens[i]->pScreen,
				 DDC ?
				 (DDC->features.input_type ?
				  SubPixelHorizontalRGB : SubPixelNone) :
				 SubPixelUnknown);
    }
#endif
#ifdef RANDR
    if (!xf86Info.disableRandR)
	xf86RandRInit (screenInfo.screens[scr_index]);
    xf86Msg(xf86Info.randRFrom, "RandR %s\n",
	    xf86Info.disableRandR ? "disabled" : "enabled");
#endif
  }

  xf86PostScreenInit();

  xf86InitOrigins();

  xf86Resetting = FALSE;
  xf86Initialising = FALSE;

  RegisterBlockAndWakeupHandlers((BlockHandlerProcPtr)NoopDDA, xf86Wakeup,
				 NULL);
}

/*
 * InitInput --
 *      Initialize all supported input devices.
 */

void
InitInput(argc, argv)
     int	  argc;
     char	  **argv;
{
    IDevPtr* pDev;
    InputDriverPtr pDrv;
    InputInfoPtr pInfo;

    xf86Info.vtRequestsPending = FALSE;

    /* Call the PreInit function for each input device instance. */
    for (pDev = xf86ConfigLayout.inputs; pDev && *pDev; pDev++) {
        /* Replace obsolete keyboard driver with kbd */
        if (!xf86NameCmp((*pDev)->driver, "keyboard")) {
            strcpy((*pDev)->driver, "kbd");
        }

        if ((pDrv = xf86LookupInputDriver((*pDev)->driver)) == NULL) {
            xf86Msg(X_ERROR, "No Input driver matching `%s'\n", (*pDev)->driver);
            /* XXX For now, just continue. */
            continue;
        }
        if (!pDrv->PreInit) {
            xf86MsgVerb(X_WARNING, 0,
                    "Input driver `%s' has no PreInit function (ignoring)\n",
                    pDrv->driverName);
            continue;
        }
        pInfo = pDrv->PreInit(pDrv, *pDev, 0);
        if (!pInfo) {
            xf86Msg(X_ERROR, "PreInit returned NULL for \"%s\"\n",
                    (*pDev)->identifier);
            continue;
        } else if (!(pInfo->flags & XI86_CONFIGURED)) {
            xf86Msg(X_ERROR, "PreInit failed for input device \"%s\"\n",
                    (*pDev)->identifier);
            xf86DeleteInput(pInfo, 0);
            continue;
        }
    }

    /* Initialise all input devices. */
    pInfo = xf86InputDevs;
    while (pInfo) {
        xf86Msg(X_INFO, "evaluating device (%s)\n", pInfo->name);
	xf86ActivateDevice(pInfo);
	pInfo = pInfo->next;
    }

    mieqInit();
}

/*
 * OsVendorInit --
 *      OS/Vendor-specific initialisations.  Called from OsInit(), which
 *      is called by dix before establishing the well known sockets.
 */

void
OsVendorInit()
{
  static Bool beenHere = FALSE;

#ifdef SIGCHLD
  signal(SIGCHLD, SIG_DFL);	/* Need to wait for child processes */
#endif

  if (!beenHere)
    xf86LogInit();

        /* Set stderr to non-blocking. */
#ifndef O_NONBLOCK
#if defined(FNDELAY)
#define O_NONBLOCK FNDELAY
#elif defined(O_NDELAY)
#define O_NONBLOCK O_NDELAY
#endif

#ifdef O_NONBLOCK
  if (!beenHere) {
    if (geteuid() == 0 && getuid() != geteuid())
    {
      int status;

      status = fcntl(fileno(stderr), F_GETFL, 0);
      if (status != -1) {
	fcntl(fileno(stderr), F_SETFL, status | O_NONBLOCK);
      }
    }
  }
#endif
#endif

  beenHere = TRUE;
}

/*
 * ddxGiveUp --
 *      Device dependent cleanup. Called by by dix before normal server death.
 *      For SYSV386 we must switch the terminal back to normal mode. No error-
 *      checking here, since there should be restored as much as possible.
 */

void
ddxGiveUp()
{
    int i;

#ifdef XF86PM
    if (xf86OSPMClose)
	xf86OSPMClose();
    xf86OSPMClose = NULL;
#endif

    xf86AccessLeaveState();

    for (i = 0; i < xf86NumScreens; i++) {
	/*
	 * zero all access functions to
	 * trap calls when switched away.
	 */
	xf86Screens[i]->vtSema = FALSE;
	xf86Screens[i]->access = NULL;
	xf86Screens[i]->busAccess = NULL;
    }

#ifdef XFreeXDGA
    DGAShutdown();
#endif

    xf86CloseConsole();

    xf86CloseLog();

    /* If an unexpected signal was caught, dump a core for debugging */
    if (xf86Info.caughtSignal)
	abort();
}



/*
 * AbortDDX --
 *      DDX - specific abort routine.  Called by AbortServer(). The attempt is
 *      made to restore all original setting of the displays. Also all devices
 *      are closed.
 */

void
AbortDDX()
{
  int i;

  /*
   * try to restore the original video state
   */
#ifdef DPMSExtension /* Turn screens back on */
  if (DPMSPowerLevel != DPMSModeOn)
      DPMSSet(serverClient, DPMSModeOn);
#endif
  if (xf86Screens) {
      if (xf86Screens[0]->vtSema)
	  xf86EnterServerState(SETUP);
      for (i = 0; i < xf86NumScreens; i++)
	  if (xf86Screens[i]->vtSema) {
	      /*
	       * if we are aborting before ScreenInit() has finished
	       * we might not have been wrapped yet. Therefore enable
	       * screen explicitely.
	       */
	      xf86EnableAccess(xf86Screens[i]);
	      (xf86Screens[i]->LeaveVT)(i, 0);
	  }
  }

  xf86AccessLeave();

  /*
   * This is needed for an abnormal server exit, since the normal exit stuff
   * MUST also be performed (i.e. the vt must be left in a defined state)
   */
  ddxGiveUp();
}

void
OsVendorFatalError()
{
#ifdef VENDORSUPPORT
    ErrorF("\nPlease refer to your Operating System Vendor support pages\n"
	   "at %s for support on this crash.\n",VENDORSUPPORT);
#else
    ErrorF("\nPlease consult the "XVENDORNAME" support \n"
	   "\t at "__VENDORDWEBSUPPORT__"\n for help. \n");
#endif
    if (xf86LogFile && xf86LogFileWasOpened)
	ErrorF("Please also check the log file at \"%s\" for additional "
              "information.\n", xf86LogFile);
    ErrorF("\n");
}

int
xf86SetVerbosity(int verb)
{
    int save = xf86Verbose;

    xf86Verbose = verb;
    LogSetParameter(XLOG_VERBOSITY, verb);
    return save;
}

int
xf86SetLogVerbosity(int verb)
{
    int save = xf86LogVerbose;

    xf86LogVerbose = verb;
    LogSetParameter(XLOG_FILE_VERBOSITY, verb);
    return save;
}

static void
xf86PrintDefaultModulePath(void)
{
  ErrorF("%s\n", DEFAULT_MODULE_PATH);
}

static void
xf86PrintDefaultLibraryPath(void)
{
  ErrorF("%s\n", DEFAULT_LIBRARY_PATH);
}

/*
 * ddxProcessArgument --
 *	Process device-dependent command line args. Returns 0 if argument is
 *      not device dependent, otherwise Count of number of elements of argv
 *      that are part of a device dependent commandline option.
 *
 */

/* ARGSUSED */
int
ddxProcessArgument(int argc, char **argv, int i)
{
  /*
   * Note: can't use xalloc/xfree here because OsInit() hasn't been called
   * yet.  Use malloc/free instead.
   */

#define CHECK_FOR_REQUIRED_ARGUMENT() \
    if (((i + 1) >= argc) || (!argv[i + 1])) { 				\
      ErrorF("Required argument to %s not specified\n", argv[i]); 	\
      UseMsg(); 							\
      FatalError("Required argument to %s not specified\n", argv[i]);	\
    }

  /* First the options that are only allowed for root */
  if (getuid() == 0 || geteuid() != 0)
  {
    if (!strcmp(argv[i], "-modulepath"))
    {
      char *mp;
      CHECK_FOR_REQUIRED_ARGUMENT();
      mp = malloc(strlen(argv[i + 1]) + 1);
      if (!mp)
	FatalError("Can't allocate memory for ModulePath\n");
      strcpy(mp, argv[i + 1]);
      xf86ModulePath = mp;
      xf86ModPathFrom = X_CMDLINE;
      return 2;
    }
    else if (!strcmp(argv[i], "-logfile"))
    {
      char *lf;
      CHECK_FOR_REQUIRED_ARGUMENT();
      lf = malloc(strlen(argv[i + 1]) + 1);
      if (!lf)
	FatalError("Can't allocate memory for LogFile\n");
      strcpy(lf, argv[i + 1]);
      xf86LogFile = lf;
      xf86LogFileFrom = X_CMDLINE;
      return 2;
    }
  } else if (!strcmp(argv[i], "-modulepath") || !strcmp(argv[i], "-logfile")) {
    FatalError("The '%s' option can only be used by root.\n", argv[i]);
  }
  if (!strcmp(argv[i], "-config") || !strcmp(argv[i], "-xf86config"))
  {
    CHECK_FOR_REQUIRED_ARGUMENT();
    if (getuid() != 0 && !xf86PathIsSafe(argv[i + 1])) {
      FatalError("\nInvalid argument for %s\n"
	  "\tFor non-root users, the file specified with %s must be\n"
	  "\ta relative path and must not contain any \"..\" elements.\n"
	  "\tUsing default "__XCONFIGFILE__" search path.\n\n",
	  argv[i], argv[i]);
    }
    xf86ConfigFile = argv[i + 1];
    return 2;
  }
  if (!strcmp(argv[i],"-probeonly"))
  {
    xf86ProbeOnly = TRUE;
    return 1;
  }
  if (!strcmp(argv[i],"-flipPixels"))
  {
    xf86FlipPixels = TRUE;
    return 1;
  }
#ifdef XF86VIDMODE
  if (!strcmp(argv[i],"-disableVidMode"))
  {
    xf86VidModeDisabled = TRUE;
    return 1;
  }
  if (!strcmp(argv[i],"-allowNonLocalXvidtune"))
  {
    xf86VidModeAllowNonLocal = TRUE;
    return 1;
  }
#endif
  if (!strcmp(argv[i],"-allowMouseOpenFail"))
  {
    xf86AllowMouseOpenFail = TRUE;
    return 1;
  }
  if (!strcmp(argv[i],"-ignoreABI"))
  {
    LoaderSetOptions(LDR_OPT_ABI_MISMATCH_NONFATAL);
    return 1;
  }
  if (!strcmp(argv[i],"-verbose"))
  {
    if (++i < argc && argv[i])
    {
      char *end;
      long val;
      val = strtol(argv[i], &end, 0);
      if (*end == '\0')
      {
	xf86SetVerbosity(val);
	return 2;
      }
    }
    xf86SetVerbosity(++xf86Verbose);
    return 1;
  }
  if (!strcmp(argv[i],"-logverbose"))
  {
    if (++i < argc && argv[i])
    {
      char *end;
      long val;
      val = strtol(argv[i], &end, 0);
      if (*end == '\0')
      {
	xf86SetLogVerbosity(val);
	return 2;
      }
    }
    xf86SetLogVerbosity(++xf86LogVerbose);
    return 1;
  }
  if (!strcmp(argv[i],"-quiet"))
  {
    xf86SetVerbosity(0);
    return 1;
  }
  if (!strcmp(argv[i],"-showconfig") || !strcmp(argv[i],"-version"))
  {
    xf86PrintBanner();
    exit(0);
  }
  if (!strcmp(argv[i],"-showDefaultModulePath"))
  {
    xf86PrintDefaultModulePath();
    exit(0);
  }
  if (!strcmp(argv[i],"-showDefaultLibPath"))
  {
    xf86PrintDefaultLibraryPath();
    exit(0);
  }
  /* Notice the -fp flag, but allow it to pass to the dix layer */
  if (!strcmp(argv[i], "-fp"))
  {
    xf86fpFlag = TRUE;
    return 0;
  }
  /* Notice the -bs flag, but allow it to pass to the dix layer */
  if (!strcmp(argv[i], "-bs"))
  {
    xf86bsDisableFlag = TRUE;
    return 0;
  }
  /* Notice the +bs flag, but allow it to pass to the dix layer */
  if (!strcmp(argv[i], "+bs"))
  {
    xf86bsEnableFlag = TRUE;
    return 0;
  }
  /* Notice the -s flag, but allow it to pass to the dix layer */
  if (!strcmp(argv[i], "-s"))
  {
    xf86sFlag = TRUE;
    return 0;
  }
  if (!strcmp(argv[i], "-pixmap24"))
  {
    xf86Pix24 = Pix24Use24;
    return 1;
  }
  if (!strcmp(argv[i], "-pixmap32"))
  {
    xf86Pix24 = Pix24Use32;
    return 1;
  }
  if (!strcmp(argv[i], "-fbbpp"))
  {
    int bpp;
    CHECK_FOR_REQUIRED_ARGUMENT();
    if (sscanf(argv[++i], "%d", &bpp) == 1)
    {
      xf86FbBpp = bpp;
      return 2;
    }
    else
    {
      ErrorF("Invalid fbbpp\n");
      return 0;
    }
  }
  if (!strcmp(argv[i], "-depth"))
  {
    int depth;
    CHECK_FOR_REQUIRED_ARGUMENT();
    if (sscanf(argv[++i], "%d", &depth) == 1)
    {
      xf86Depth = depth;
      return 2;
    }
    else
    {
      ErrorF("Invalid depth\n");
      return 0;
    }
  }
  if (!strcmp(argv[i], "-weight"))
  {
    int red, green, blue;
    CHECK_FOR_REQUIRED_ARGUMENT();
    if (sscanf(argv[++i], "%1d%1d%1d", &red, &green, &blue) == 3)
    {
      xf86Weight.red = red;
      xf86Weight.green = green;
      xf86Weight.blue = blue;
      return 2;
    }
    else
    {
      ErrorF("Invalid weighting\n");
      return 0;
    }
  }
  if (!strcmp(argv[i], "-gamma")  || !strcmp(argv[i], "-rgamma") ||
      !strcmp(argv[i], "-ggamma") || !strcmp(argv[i], "-bgamma"))
  {
    double gamma;
    CHECK_FOR_REQUIRED_ARGUMENT();
    if (sscanf(argv[++i], "%lf", &gamma) == 1) {
       if (gamma < GAMMA_MIN || gamma > GAMMA_MAX) {
	  ErrorF("gamma out of range, only  %.2f <= gamma_value <= %.1f"
		 " is valid\n", GAMMA_MIN, GAMMA_MAX);
	  return 0;
       }
       if (!strcmp(argv[i-1], "-gamma"))
	  xf86Gamma.red = xf86Gamma.green = xf86Gamma.blue = gamma;
       else if (!strcmp(argv[i-1], "-rgamma")) xf86Gamma.red = gamma;
       else if (!strcmp(argv[i-1], "-ggamma")) xf86Gamma.green = gamma;
       else if (!strcmp(argv[i-1], "-bgamma")) xf86Gamma.blue = gamma;
       return 2;
    }
  }
  if (!strcmp(argv[i], "-layout"))
  {
    CHECK_FOR_REQUIRED_ARGUMENT();
    xf86LayoutName = argv[++i];
    return 2;
  }
  if (!strcmp(argv[i], "-screen"))
  {
    CHECK_FOR_REQUIRED_ARGUMENT();
    xf86ScreenName = argv[++i];
    return 2;
  }
  if (!strcmp(argv[i], "-pointer"))
  {
    CHECK_FOR_REQUIRED_ARGUMENT();
    xf86PointerName = argv[++i];
    return 2;
  }
  if (!strcmp(argv[i], "-keyboard"))
  {
    CHECK_FOR_REQUIRED_ARGUMENT();
    xf86KeyboardName = argv[++i];
    return 2;
  }
  if (!strcmp(argv[i], "-nosilk"))
  {
    xf86silkenMouseDisableFlag = TRUE;
    return 1;
  }
#ifdef HAVE_ACPI
  if (!strcmp(argv[i], "-noacpi"))
  {
    xf86acpiDisableFlag = TRUE;
    return 1;
  }
#endif
  if (!strcmp(argv[i], "-probe"))
  {
    xf86DoProbe = TRUE;
    return 1;
  }
  if (!strcmp(argv[i], "-configure"))
  {
    if (getuid() != 0 && geteuid() == 0) {
	ErrorF("The '-configure' option can only be used by root.\n");
	exit(1);
    }
    xf86DoConfigure = TRUE;
    xf86AllowMouseOpenFail = TRUE;
    return 1;
  }
  if (!strcmp(argv[i], "-isolateDevice"))
  {
    int bus, device, func;
    CHECK_FOR_REQUIRED_ARGUMENT();
    if (strncmp(argv[++i], "PCI:", 4)) {
       FatalError("Bus types other than PCI not yet isolable\n");
    }
    if (sscanf(argv[i], "PCI:%d:%d:%d", &bus, &device, &func) == 3) {
       xf86IsolateDevice.domain = PCI_DOM_FROM_BUS(bus);
       xf86IsolateDevice.bus = PCI_BUS_NO_DOMAIN(bus);
       xf86IsolateDevice.dev = device;
       xf86IsolateDevice.func = func;
       return 2;
    } else {
       FatalError("Invalid isolated device specification\n");
    }
  }
  /* OS-specific processing */
  return xf86ProcessArgument(argc, argv, i);
}

/*
 * ddxUseMsg --
 *	Print out correct use of device dependent commandline options.
 *      Maybe the user now knows what really to do ...
 */

void
ddxUseMsg()
{
  ErrorF("\n");
  ErrorF("\n");
  ErrorF("Device Dependent Usage\n");
  if (getuid() == 0 || geteuid() != 0)
  {
    ErrorF("-modulepath paths      specify the module search path\n");
    ErrorF("-logfile file          specify a log file name\n");
    ErrorF("-configure             probe for devices and write an "__XCONFIGFILE__"\n");
  }
  ErrorF("-config file           specify a configuration file, relative to the\n");
  ErrorF("                       "__XCONFIGFILE__" search path, only root can use absolute\n");
  ErrorF("-probeonly             probe for devices, then exit\n");
  ErrorF("-verbose [n]           verbose startup messages\n");
  ErrorF("-logverbose [n]        verbose log messages\n");
  ErrorF("-quiet                 minimal startup messages\n");
  ErrorF("-pixmap24              use 24bpp pixmaps for depth 24\n");
  ErrorF("-pixmap32              use 32bpp pixmaps for depth 24\n");
  ErrorF("-fbbpp n               set bpp for the framebuffer. Default: 8\n");
  ErrorF("-depth n               set colour depth. Default: 8\n");
  ErrorF("-gamma f               set gamma value (0.1 < f < 10.0) Default: 1.0\n");
  ErrorF("-rgamma f              set gamma value for red phase\n");
  ErrorF("-ggamma f              set gamma value for green phase\n");
  ErrorF("-bgamma f              set gamma value for blue phase\n");
  ErrorF("-weight nnn            set RGB weighting at 16 bpp.  Default: 565\n");
  ErrorF("-layout name           specify the ServerLayout section name\n");
  ErrorF("-screen name           specify the Screen section name\n");
  ErrorF("-keyboard name         specify the core keyboard InputDevice name\n");
  ErrorF("-pointer name          specify the core pointer InputDevice name\n");
  ErrorF("-nosilk                disable Silken Mouse\n");
  ErrorF("-flipPixels            swap default black/white Pixel values\n");
#ifdef XF86VIDMODE
  ErrorF("-disableVidMode        disable mode adjustments with xvidtune\n");
  ErrorF("-allowNonLocalXvidtune allow xvidtune to be run as a non-local client\n");
#endif
  ErrorF("-allowMouseOpenFail    start server even if the mouse can't be initialized\n");
  ErrorF("-ignoreABI             make module ABI mismatches non-fatal\n");
  ErrorF("-isolateDevice bus_id  restrict device resets to bus_id (PCI only)\n");
  ErrorF("-version               show the server version\n");
  ErrorF("-showDefaultModulePath show the server default module path\n");
  ErrorF("-showDefaultLibPath    show the server default library path\n");
  /* OS-specific usage */
  xf86UseMsg();
  ErrorF("\n");
}


/*
 * xf86LoadModules iterates over a list that is being passed in.
 */
Bool
xf86LoadModules(char **list, pointer *optlist)
{
    int errmaj, errmin;
    pointer opt;
    int i;
    char *name;
    Bool failed = FALSE;

    if (!list)
	return TRUE;

    for (i = 0; list[i] != NULL; i++) {

	/* Normalise the module name */
	name = xf86NormalizeName(list[i]);

	/* Skip empty names */
	if (name == NULL || *name == '\0')
	    continue;

	/* Replace obsolete keyboard driver with kbd */
	if (!xf86NameCmp(name, "keyboard")) {
	    strcpy(name, "kbd");
	}

	if (optlist)
	    opt = optlist[i];
	else
	    opt = NULL;

        if (!LoadModule(name, NULL, NULL, NULL, opt, NULL, &errmaj, &errmin)) {
	    LoaderErrorMsg(NULL, name, errmaj, errmin);
	    failed = TRUE;
	}
	xfree(name);
    }
    return !failed;
}

/* Pixmap format stuff */

_X_EXPORT PixmapFormatPtr
xf86GetPixFormat(ScrnInfoPtr pScrn, int depth)
{
    int i;
    static PixmapFormatRec format;	/* XXX not reentrant */

    /*
     * When the formats[] list initialisation isn't complete, check the
     * depth 24 pixmap config/cmdline options and screen-specified formats.
     */

    if (!formatsDone) {
	if (depth == 24) {
	    Pix24Flags pix24 = Pix24DontCare;

	    format.depth = 24;
	    format.scanlinePad = BITMAP_SCANLINE_PAD;
	    if (xf86Info.pixmap24 != Pix24DontCare)
		pix24 = xf86Info.pixmap24;
	    else if (pScrn->pixmap24 != Pix24DontCare)
		pix24 = pScrn->pixmap24;
	    if (pix24 == Pix24Use24)
		format.bitsPerPixel = 24;
	    else
		format.bitsPerPixel = 32;
	    return &format;
	}
    }

    for (i = 0; i < numFormats; i++)
	if (formats[i].depth == depth)
	   break;
    if (i != numFormats)
	return &formats[i];
    else if (!formatsDone) {
	/* Check for screen-specified formats */
	for (i = 0; i < pScrn->numFormats; i++)
	    if (pScrn->formats[i].depth == depth)
		break;
	if (i != pScrn->numFormats)
	    return &pScrn->formats[i];
    }
    return NULL;
}

_X_EXPORT int
xf86GetBppFromDepth(ScrnInfoPtr pScrn, int depth)
{
    PixmapFormatPtr format;


    format = xf86GetPixFormat(pScrn, depth);
    if (format)
	return format->bitsPerPixel;
    else
	return 0;
}