path: root/src/mesa/drivers/dri/r200/r200_screen.c

/* $XFree86: xc/lib/GL/mesa/src/drv/r200/r200_screen.c,v 1.4 2003/05/08 09:25:35 herrb Exp $ */
/*
Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.

The Weather Channel (TM) funded Tungsten Graphics to develop the
initial release of the Radeon 8500 driver under the XFree86 license.
This notice must be preserved.

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 (including the
next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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.

**************************************************************************/

/**
 * \file r200_screen.c
 * Screen initialization functions for the R200 driver.
 * 
 * \author Keith Whitwell <keith@tungstengraphics.com>
 */

#include <dlfcn.h>

#include "glheader.h"
#include "imports.h"
#include "context.h"

#include "r200_screen.h"
#include "r200_context.h"
#include "r200_ioctl.h"
#include "radeon_macros.h"
#include "radeon_reg.h"

#include "utils.h"
#include "vblank.h"
#ifndef _SOLO
#include "glxextensions.h"
#endif

/* R200 configuration
 */
#include "xmlpool.h"

const char __driConfigOptions[] =
DRI_CONF_BEGIN
    DRI_CONF_SECTION_PERFORMANCE
        DRI_CONF_TCL_MODE(DRI_CONF_TCL_CODEGEN)
        DRI_CONF_FTHROTTLE_MODE(DRI_CONF_FTHROTTLE_IRQS)
        DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
    DRI_CONF_SECTION_END
    DRI_CONF_SECTION_QUALITY
        DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
        DRI_CONF_DEF_MAX_ANISOTROPY(1.0,"1.0,2.0,4.0,8.0,16.0")
        DRI_CONF_NO_NEG_LOD_BIAS(false)
        DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
        DRI_CONF_ROUND_MODE(DRI_CONF_ROUND_TRUNC)
        DRI_CONF_DITHER_MODE(DRI_CONF_DITHER_XERRORDIFF)
    DRI_CONF_SECTION_END
    DRI_CONF_SECTION_DEBUG
        DRI_CONF_NO_RAST(false)
    DRI_CONF_SECTION_END
DRI_CONF_END;
static const GLuint __driNConfigOptions = 10;

#if 1
/* Including xf86PciInfo.h introduces a bunch of errors...
 */
#define PCI_CHIP_R200_QD	0x5144
#define PCI_CHIP_R200_QE	0x5145
#define PCI_CHIP_R200_QF	0x5146
#define PCI_CHIP_R200_QG	0x5147
#define PCI_CHIP_R200_QY	0x5159
#define PCI_CHIP_R200_QZ	0x515A
#define PCI_CHIP_R200_LW	0x4C57 
#define PCI_CHIP_R200_LY	0x4C59
#define PCI_CHIP_R200_LZ	0x4C5A
#define PCI_CHIP_RV200_QW	0x5157 /* Radeon 7500 - not an R200 at all */
#define PCI_CHIP_RS100_4136     0x4136 /* IGP RS100, RS200, RS250 are not R200 */
#define PCI_CHIP_RS200_4137     0x4137
#define PCI_CHIP_RS250_4237     0x4237
#define PCI_CHIP_RS100_4336     0x4336
#define PCI_CHIP_RS200_4337     0x4337
#define PCI_CHIP_RS250_4437     0x4437
#define PCI_CHIP_RS300_5834     0x5834 /* All RS300's are R200 */
#define PCI_CHIP_RS300_5835     0x5835
#define PCI_CHIP_RS300_5836     0x5836
#define PCI_CHIP_RS300_5837     0x5837
#endif

#ifdef USE_NEWINTERFACE
static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
#endif /* USE_NEWINTERFACE */

static r200ScreenPtr __r200Screen;

static int getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo );

#ifdef USE_NEWINTERFACE
static __GLcontextModes * fill_in_modes( __GLcontextModes * modes,
					 unsigned pixel_bits, 
					 unsigned depth_bits,
					 unsigned stencil_bits,
					 const GLenum * db_modes,
					 unsigned num_db_modes )
{
    static const uint8_t bits[2][4] = {
	{          5,          6,          5,          0 },
	{          8,          8,          8,          8 }
    };

    static const uint32_t masks[2][4] = {
	{ 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 },
	{ 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 }
    };

    unsigned   i;
    const unsigned index = (pixel_bits / 8) - 1;

    for ( i = 0 ; i < num_db_modes ; i++ ) {

	modes->redBits   = bits[index][0];
	modes->greenBits = bits[index][1];
	modes->blueBits  = bits[index][2];
	modes->alphaBits = bits[index][3];
	modes->redMask   = masks[index][0];
	modes->greenMask = masks[index][1];
	modes->blueMask  = masks[index][2];
	modes->alphaMask = masks[index][3];
	modes->rgbBits   = pixel_bits;

	modes->stencilBits = stencil_bits;
	modes->depthBits = depth_bits;
	
	if ( db_modes[i] == GLX_NONE ) {
	    modes->doubleBufferMode = GL_FALSE;
	}
	else {
	    modes->doubleBufferMode = GL_TRUE;
	    modes->swapMethod = db_modes[i];
	}
	
	modes = modes->next;
    }
    
    return modes;
}
#endif /* USE_NEWINTERFACE */


#ifdef USE_NEWINTERFACE
static __GLcontextModes *
r200FillInModes( unsigned pixel_bits, unsigned depth_bits,
		 unsigned stencil_bits, GLboolean have_back_buffer )
{
    __GLcontextModes * modes;
    __GLcontextModes * m;
    unsigned num_modes;
    unsigned depth_buffer_factor;
    unsigned back_buffer_factor;
    unsigned i;

    /* Right now GLX_SWAP_COPY_OML isn't supported, but it would be easy
     * enough to add support.  Basically, if a context is created with an
     * fbconfig where the swap method is GLX_SWAP_COPY_OML, pageflipping
     * will never be used.
     */
    static const GLenum back_buffer_modes[] = {
	GLX_NONE, GLX_SWAP_UNDEFINED_OML /*, GLX_SWAP_COPY_OML */
    };

    int depth_buffer_modes[2][2] = {
	{ 0, 0 },
	{ 0, 0 }
    };

    depth_buffer_modes[1][0] = depth_bits;
    depth_buffer_modes[1][1] = stencil_bits;

    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 2 : 1;
    back_buffer_factor  = (have_back_buffer) ? 2 : 1;

    num_modes = depth_buffer_factor * back_buffer_factor;

    modes = (*create_context_modes)( num_modes, sizeof( __GLcontextModes ) );
    m = modes;
    for ( i = 0 ; i < depth_buffer_factor ; i++ ) {
	m = fill_in_modes( m, pixel_bits, 
			   depth_buffer_modes[i][0], depth_buffer_modes[i][1],
			   back_buffer_modes, back_buffer_factor );
    }

    return modes;
}
#endif USE_NEWINTERFACE


/* Create the device specific screen private data struct.
 */
static r200ScreenPtr 
r200CreateScreen( __DRIscreenPrivate *sPriv )
{
   r200ScreenPtr screen;
   RADEONDRIPtr dri_priv = (RADEONDRIPtr)sPriv->pDevPriv;
   unsigned char *RADEONMMIO;

   if ( ! driCheckDriDdxDrmVersions( sPriv, "R200", 4, 0, 4, 0, 1, 5 ) )
      return NULL;

   /* Allocate the private area */
   screen = (r200ScreenPtr) CALLOC( sizeof(*screen) );
   if ( !screen ) {
      __driUtilMessage("%s: Could not allocate memory for screen structure",
		       __FUNCTION__);
      return NULL;
   }

   screen->chipset = 0;
   switch ( dri_priv->deviceID ) {
   case PCI_CHIP_R200_QD:
   case PCI_CHIP_R200_QE:
   case PCI_CHIP_R200_QF:
   case PCI_CHIP_R200_QG:
   case PCI_CHIP_R200_QY:
   case PCI_CHIP_R200_QZ:
   case PCI_CHIP_RV200_QW:
   case PCI_CHIP_R200_LW:
   case PCI_CHIP_R200_LY:
   case PCI_CHIP_R200_LZ:
   case PCI_CHIP_RS100_4136:
   case PCI_CHIP_RS200_4137:
   case PCI_CHIP_RS250_4237:
   case PCI_CHIP_RS100_4336:
   case PCI_CHIP_RS200_4337:
   case PCI_CHIP_RS250_4437:
      __driUtilMessage("r200CreateScreen(): Device isn't an r200!\n");
      FREE( screen );
      return NULL;

   case PCI_CHIP_RS300_5834:
   case PCI_CHIP_RS300_5835:
   case PCI_CHIP_RS300_5836:
   case PCI_CHIP_RS300_5837:
      break;

   default:
      screen->chipset |= R200_CHIPSET_TCL;
      break;
   }

   /* parse information in __driConfigOptions */
   driParseOptionInfo (&screen->optionCache,
		       __driConfigOptions, __driNConfigOptions);

   /* This is first since which regions we map depends on whether or
    * not we are using a PCI card.
    */
   screen->IsPCI = dri_priv->IsPCI;

   {
      int ret;
      drmRadeonGetParam gp;

      gp.param = RADEON_PARAM_GART_BUFFER_OFFSET;
      gp.value = &screen->gart_buffer_offset;

      ret = drmCommandWriteRead( sPriv->fd, DRM_RADEON_GETPARAM,
				 &gp, sizeof(gp));
      if (ret) {
	 FREE( screen );
	 fprintf(stderr, "drmRadeonGetParam (RADEON_PARAM_GART_BUFFER_OFFSET): %d\n", ret);
	 return NULL;
      }

      if (sPriv->drmMinor >= 6) {
	 gp.param = RADEON_PARAM_GART_BASE;
	 gp.value = &screen->gart_base;

	 ret = drmCommandWriteRead( sPriv->fd, DRM_RADEON_GETPARAM,
				    &gp, sizeof(gp));
	 if (ret) {
	    FREE( screen );
	    fprintf(stderr, "drmR200GetParam (RADEON_PARAM_GART_BASE): %d\n", ret);
	    return NULL;
	 }


	 gp.param = RADEON_PARAM_IRQ_NR;
	 gp.value = &screen->irq;

	 ret = drmCommandWriteRead( sPriv->fd, DRM_RADEON_GETPARAM,
				    &gp, sizeof(gp));
	 if (ret) {
	    FREE( screen );
	    fprintf(stderr, "drmRadeonGetParam (RADEON_PARAM_IRQ_NR): %d\n", ret);
	    return NULL;
	 }

	 /* Check if kernel module is new enough to support cube maps */
	 screen->drmSupportsCubeMaps = (sPriv->drmMinor >= 7);
      }
   }

   screen->mmio.handle = dri_priv->registerHandle;
   screen->mmio.size   = dri_priv->registerSize;
   if ( drmMap( sPriv->fd,
		screen->mmio.handle,
		screen->mmio.size,
		&screen->mmio.map ) ) {
      FREE( screen );
      __driUtilMessage("%s: drmMap failed\n", __FUNCTION__ );
      return NULL;
   }

   screen->status.handle = dri_priv->statusHandle;
   screen->status.size   = dri_priv->statusSize;
   if ( drmMap( sPriv->fd,
		screen->status.handle,
		screen->status.size,
		&screen->status.map ) ) {
      drmUnmap( screen->mmio.map, screen->mmio.size );
      FREE( screen );
      __driUtilMessage("%s: drmMap (2) failed\n", __FUNCTION__ );
      return NULL;
   }
   screen->scratch = (__volatile__ CARD32 *)
      ((GLubyte *)screen->status.map + RADEON_SCRATCH_REG_OFFSET);

   screen->buffers = drmMapBufs( sPriv->fd );
   if ( !screen->buffers ) {
      drmUnmap( screen->status.map, screen->status.size );
      drmUnmap( screen->mmio.map, screen->mmio.size );
      FREE( screen );
      __driUtilMessage("%s: drmMapBufs failed\n", __FUNCTION__ );
      return NULL;
   }

   RADEONMMIO = screen->mmio.map;

   if ( dri_priv->gartTexHandle && dri_priv->gartTexMapSize ) {

      screen->gartTextures.handle = dri_priv->gartTexHandle;
      screen->gartTextures.size   = dri_priv->gartTexMapSize;
      if ( drmMap( sPriv->fd,
		   screen->gartTextures.handle,
		   screen->gartTextures.size,
		   (drmAddressPtr)&screen->gartTextures.map ) ) {
	 drmUnmapBufs( screen->buffers );
	 drmUnmap( screen->status.map, screen->status.size );
	 drmUnmap( screen->mmio.map, screen->mmio.size );
	 FREE( screen );
	 __driUtilMessage("%s: drmMAP failed for GART texture area\n", __FUNCTION__);
	 return NULL;
      }

      screen->gart_texture_offset = dri_priv->gartTexOffset + ( screen->IsPCI
		? INREG( RADEON_AIC_LO_ADDR )
		: ( ( INREG( RADEON_MC_AGP_LOCATION ) & 0x0ffffU ) << 16 ) );
   }

   screen->cpp = dri_priv->bpp / 8;
   screen->AGPMode = dri_priv->AGPMode;

   screen->fbLocation	= ( INREG( RADEON_MC_FB_LOCATION ) & 0xffff ) << 16;

   if ( sPriv->drmMinor >= 10 ) {
      drmRadeonSetParam sp;

      sp.param = RADEON_SETPARAM_FB_LOCATION;
      sp.value = screen->fbLocation;

      drmCommandWrite( sPriv->fd, DRM_RADEON_SETPARAM,
		       &sp, sizeof( sp ) );
   }

   screen->frontOffset	= dri_priv->frontOffset;
   screen->frontPitch	= dri_priv->frontPitch;
   screen->backOffset	= dri_priv->backOffset;
   screen->backPitch	= dri_priv->backPitch;
   screen->depthOffset	= dri_priv->depthOffset;
   screen->depthPitch	= dri_priv->depthPitch;

   screen->texOffset[RADEON_CARD_HEAP] = dri_priv->textureOffset
				       + screen->fbLocation;
   screen->texSize[RADEON_CARD_HEAP] = dri_priv->textureSize;
   screen->logTexGranularity[RADEON_CARD_HEAP] =
      dri_priv->log2TexGran;

   if ( !screen->gartTextures.map ) {
      screen->numTexHeaps = RADEON_NR_TEX_HEAPS - 1;
      screen->texOffset[RADEON_GART_HEAP] = 0;
      screen->texSize[RADEON_GART_HEAP] = 0;
      screen->logTexGranularity[RADEON_GART_HEAP] = 0;
   } else {
      screen->numTexHeaps = RADEON_NR_TEX_HEAPS;
      screen->texOffset[RADEON_GART_HEAP] = screen->gart_texture_offset;
      screen->texSize[RADEON_GART_HEAP] = dri_priv->gartTexMapSize;
      screen->logTexGranularity[RADEON_GART_HEAP] =
	 dri_priv->log2GARTTexGran;
   }

   screen->driScreen = sPriv;
   screen->sarea_priv_offset = dri_priv->sarea_priv_offset;
#ifndef _SOLO
   if ( driCompareGLXAPIVersion( 20030813 ) >= 0 ) {
      PFNGLXSCRENABLEEXTENSIONPROC glx_enable_extension =
          (PFNGLXSCRENABLEEXTENSIONPROC) glXGetProcAddress( (const GLubyte *) "__glXScrEnableExtension" );
      void * const psc = sPriv->psc->screenConfigs;

      if ( glx_enable_extension != NULL ) {
	 if ( screen->irq != 0 ) {
	    (*glx_enable_extension)( psc, "GLX_SGI_swap_control" );
	    (*glx_enable_extension)( psc, "GLX_SGI_video_sync" );
	    (*glx_enable_extension)( psc, "GLX_MESA_swap_control" );
	 }

	 (*glx_enable_extension)( psc, "GLX_MESA_swap_frame_usage" );

	 if ( driCompareGLXAPIVersion( 20030818 ) >= 0 ) {
	    sPriv->psc->allocateMemory = (void *) r200AllocateMemoryMESA;
	    sPriv->psc->freeMemory     = (void *) r200FreeMemoryMESA;
	    sPriv->psc->memoryOffset   = (void *) r200GetMemoryOffsetMESA;

	    (*glx_enable_extension)( psc, "GLX_MESA_allocate_memory" );
	 }
	  
	 if ( driCompareGLXAPIVersion( 20030915 ) >= 0 ) {
	    (*glx_enable_extension)( psc, "GLX_SGIX_fbconfig" );
	    (*glx_enable_extension)( psc, "GLX_OML_swap_method" );
	 }
      }
   }
#endif
   return screen;
}

/* Destroy the device specific screen private data struct.
 */
static void 
r200DestroyScreen( __DRIscreenPrivate *sPriv )
{
   r200ScreenPtr screen = (r200ScreenPtr)sPriv->private;

   if (!screen)
      return;

   if ( screen->gartTextures.map ) {
      drmUnmap( screen->gartTextures.map, screen->gartTextures.size );
   }
   drmUnmapBufs( screen->buffers );
   drmUnmap( screen->status.map, screen->status.size );
   drmUnmap( screen->mmio.map, screen->mmio.size );

   /* free all option information */
   driDestroyOptionInfo (&screen->optionCache);

   FREE( screen );
   sPriv->private = NULL;
}


/* Initialize the driver specific screen private data.
 */
static GLboolean
r200InitDriver( __DRIscreenPrivate *sPriv )
{
   __r200Screen = r200CreateScreen( sPriv );

   sPriv->private = (void *) __r200Screen;

   return sPriv->private ? GL_TRUE : GL_FALSE;
}



/**
 * Create and initialize the Mesa and driver specific pixmap buffer
 * data.
 * 
 * \todo This function (and its interface) will need to be updated to support
 * pbuffers.
 */
static GLboolean
r200CreateBuffer( __DRIscreenPrivate *driScrnPriv,
                  __DRIdrawablePrivate *driDrawPriv,
                  const __GLcontextModes *mesaVis,
                  GLboolean isPixmap )
{
   if (isPixmap) {
      return GL_FALSE; /* not implemented */
   }
   else {
      const GLboolean swDepth = GL_FALSE;
      const GLboolean swAlpha = GL_FALSE;
      const GLboolean swAccum = mesaVis->accumRedBits > 0;
      const GLboolean swStencil = mesaVis->stencilBits > 0 &&
         mesaVis->depthBits != 24;
      driDrawPriv->driverPrivate = (void *)
         _mesa_create_framebuffer( mesaVis,
                                   swDepth,
                                   swStencil,
                                   swAccum,
                                   swAlpha );
      return (driDrawPriv->driverPrivate != NULL);
   }
}


static void
r200DestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
{
   _mesa_destroy_framebuffer((GLframebuffer *) (driDrawPriv->driverPrivate));
}




static const struct __DriverAPIRec r200API = {
   .InitDriver      = r200InitDriver,
   .DestroyScreen   = r200DestroyScreen,
   .CreateContext   = r200CreateContext,
   .DestroyContext  = r200DestroyContext,
   .CreateBuffer    = r200CreateBuffer,
   .DestroyBuffer   = r200DestroyBuffer,
   .SwapBuffers     = r200SwapBuffers,
   .MakeCurrent     = r200MakeCurrent,
   .UnbindContext   = r200UnbindContext,
   .OpenFullScreen  = NULL,
   .CloseFullScreen = NULL,
   .GetSwapInfo     = getSwapInfo,
   .GetMSC          = driGetMSC32,
   .WaitForMSC      = driWaitForMSC32,
   .WaitForSBC      = NULL,
   .SwapBuffersMSC  = NULL
};


/*
 * This is the bootstrap function for the driver.
 * The __driCreateScreen name is the symbol that libGL.so fetches.
 * Return:  pointer to a __DRIscreenPrivate.
 *
 */
#ifndef _SOLO 
void *__driCreateScreen(Display *dpy, int scrn, __DRIscreen *psc,
                        int numConfigs, __GLXvisualConfig *config)
{
   __DRIscreenPrivate *psp;
   psp = __driUtilCreateScreen(dpy, scrn, psc, numConfigs, config, &r200API);
   return (void *) psp;
}
#else
void *__driCreateScreen(struct DRIDriverRec *driver,
                        struct DRIDriverContextRec *driverContext)
{
   __DRIscreenPrivate *psp;
   psp = __driUtilCreateScreen(driver, driverContext, &r200API);
   return (void *) psp;
}
#endif


/**
 * This is the bootstrap function for the driver.  libGL supplies all of the
 * requisite information about the system, and the driver initializes itself.
 * This routine also fills in the linked list pointed to by \c driver_modes
 * with the \c __GLcontextModes that the driver can support for windows or
 * pbuffers.
 * 
 * \return A pointer to a \c __DRIscreenPrivate on success, or \c NULL on 
 *         failure.
 */
#ifdef USE_NEWINTERFACE
void * __driCreateNewScreen( Display *dpy, int scrn, __DRIscreen *psc,
			     const __GLcontextModes * modes,
			     const __DRIversion * ddx_version,
			     const __DRIversion * dri_version,
			     const __DRIversion * drm_version,
			     const __DRIframebuffer * frame_buffer,
			     drmAddress pSAREA, int fd, 
			     int internal_api_version,
			     __GLcontextModes ** driver_modes )
			     
{
   __DRIscreenPrivate *psp;

   psp = __driUtilCreateNewScreen(dpy, scrn, psc, modes,
				  ddx_version, dri_version, drm_version,
				  frame_buffer, pSAREA, fd,
				  internal_api_version, &r200API);


   create_context_modes = 
       (PFNGLXCREATECONTEXTMODES) glXGetProcAddress( (const GLubyte *) "__glXCreateContextModes" );
   if ( create_context_modes != NULL ) {
      RADEONDRIPtr dri_priv = (RADEONDRIPtr) psp->pDevPriv;
      *driver_modes = r200FillInModes( dri_priv->bpp,
				       (dri_priv->bpp == 16) ? 16 : 24,
				       (dri_priv->bpp == 16) ? 0  : 8,
				       (dri_priv->backOffset != dri_priv->depthOffset) );
   }

   return (void *) psp;
}
#endif /* USE_NEWINTERFACE */


/**
 * Get information about previous buffer swaps.
 */
static int
getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
{
   r200ContextPtr  rmesa;

   if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
	|| (dPriv->driContextPriv->driverPrivate == NULL)
	|| (sInfo == NULL) ) {
      return -1;
   }

   rmesa = (r200ContextPtr) dPriv->driContextPriv->driverPrivate;
   sInfo->swap_count = rmesa->swap_count;
   sInfo->swap_ust = rmesa->swap_ust;
   sInfo->swap_missed_count = rmesa->swap_missed_count;

   sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
       ? driCalculateSwapUsage( dPriv, 0, rmesa->swap_missed_ust )
       : 0.0;

   return 0;
}