win32ss/drivers/miniport/xboxvmp/xboxvmp.c

   1 /*
   2  * PROJECT:     ReactOS Xbox miniport video driver
   3  * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
   4  * PURPOSE:     Simple framebuffer driver for NVIDIA NV2A XGPU
   5  * COPYRIGHT:   Copyright 2004 Gé van Geldorp
   6  *              Copyright 2004 Filip Navara
   7  *              Copyright 2019 Stanislav Motylkov (x86corez@gmail.com)
   8  *
   9  * TODO:
  10  * - Check input parameters everywhere.
  11  * - Call VideoPortVerifyAccessRanges to reserve the memory we're about
  12  *   to map.
  13  */
  14
  15 /* INCLUDES *******************************************************************/
  16
  17 #include "xboxvmp.h"
  18
  19 #include <debug.h>
  20 #include <dpfilter.h>
  21
  22 /* PUBLIC AND PRIVATE FUNCTIONS ***********************************************/
  23
  24 ULONG
  25 NTAPI
  26 DriverEntry(
  27     IN PVOID Context1,
  28     IN PVOID Context2)
  29 {
  30     VIDEO_HW_INITIALIZATION_DATA InitData;
  31
  32     VideoPortZeroMemory(&InitData, sizeof(InitData));
  33     InitData.AdapterInterfaceType = PCIBus;
  34     InitData.HwInitDataSize = sizeof(VIDEO_HW_INITIALIZATION_DATA);
  35     InitData.HwFindAdapter = XboxVmpFindAdapter;
  36     InitData.HwInitialize = XboxVmpInitialize;
  37     InitData.HwStartIO = XboxVmpStartIO;
  38     InitData.HwResetHw = XboxVmpResetHw;
  39     InitData.HwGetPowerState = XboxVmpGetPowerState;
  40     InitData.HwSetPowerState = XboxVmpSetPowerState;
  41     InitData.HwDeviceExtensionSize = sizeof(XBOXVMP_DEVICE_EXTENSION);
  42
  43     return VideoPortInitialize(Context1, Context2, &InitData, NULL);
  44 }
  45
  46 /*
  47  * XboxVmpFindAdapter
  48  *
  49  * Detects the Xbox Nvidia display adapter.
  50  */
  51
  52 VP_STATUS
  53 NTAPI
  54 XboxVmpFindAdapter(
  55     IN PVOID HwDeviceExtension,
  56     IN PVOID HwContext,
  57     IN PWSTR ArgumentString,
  58     IN OUT PVIDEO_PORT_CONFIG_INFO ConfigInfo,
  59     OUT PUCHAR Again)
  60 {
  61     PXBOXVMP_DEVICE_EXTENSION XboxVmpDeviceExtension;
  62     VIDEO_ACCESS_RANGE AccessRanges[3];
  63     VP_STATUS Status;
  64     USHORT VendorId = 0x10DE; /* NVIDIA Corporation */
  65     USHORT DeviceId = 0x02A0; /* NV2A XGPU */
  66
  67     TRACE_(IHVVIDEO, "XboxVmpFindAdapter\n");
  68
  69     XboxVmpDeviceExtension = (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension;
  70
  71     Status = VideoPortGetAccessRanges(HwDeviceExtension, 0, NULL, 3, AccessRanges,
  72                                       &VendorId, &DeviceId, NULL);
  73
  74     if (Status == NO_ERROR)
  75     {
  76         XboxVmpDeviceExtension->PhysControlStart = AccessRanges[0].RangeStart;
  77         XboxVmpDeviceExtension->ControlLength = AccessRanges[0].RangeLength;
  78         XboxVmpDeviceExtension->PhysFrameBufferStart = AccessRanges[1].RangeStart;
  79     }
  80
  81     return Status;
  82 }
  83
  84 /*
  85  * XboxVmpInitialize
  86  *
  87  * Performs the first initialization of the adapter, after the HAL has given
  88  * up control of the video hardware to the video port driver.
  89  */
  90
  91 BOOLEAN
  92 NTAPI
  93 XboxVmpInitialize(
  94     PVOID HwDeviceExtension)
  95 {
  96     PXBOXVMP_DEVICE_EXTENSION XboxVmpDeviceExtension;
  97     ULONG inIoSpace = VIDEO_MEMORY_SPACE_MEMORY;
  98     ULONG Length;
  99
 100     TRACE_(IHVVIDEO, "XboxVmpInitialize\n");
 101
 102     XboxVmpDeviceExtension = (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension;
 103
 104     Length = XboxVmpDeviceExtension->ControlLength;
 105     XboxVmpDeviceExtension->VirtControlStart = NULL;
 106
 107     if (VideoPortMapMemory(HwDeviceExtension,
 108                            XboxVmpDeviceExtension->PhysControlStart,
 109                            &Length,
 110                            &inIoSpace,
 111                            &XboxVmpDeviceExtension->VirtControlStart) != NO_ERROR)
 112     {
 113         ERR_(IHVVIDEO, "Failed to map control memory\n");
 114         return FALSE;
 115     }
 116
 117     INFO_(IHVVIDEO, "Mapped 0x%x bytes of control mem at 0x%x to virt addr 0x%x\n",
 118         XboxVmpDeviceExtension->ControlLength,
 119         XboxVmpDeviceExtension->PhysControlStart.u.LowPart,
 120         XboxVmpDeviceExtension->VirtControlStart);
 121
 122     return TRUE;
 123 }
 124
 125 /*
 126  * XboxVmpStartIO
 127  *
 128  * Processes the specified Video Request Packet.
 129  */
 130
 131 BOOLEAN
 132 NTAPI
 133 XboxVmpStartIO(
 134     PVOID HwDeviceExtension,
 135     PVIDEO_REQUEST_PACKET RequestPacket)
 136 {
 137     BOOLEAN Result;
 138
 139     RequestPacket->StatusBlock->Status = ERROR_INVALID_PARAMETER;
 140
 141     switch (RequestPacket->IoControlCode)
 142     {
 143         case IOCTL_VIDEO_SET_CURRENT_MODE:
 144         {
 145             TRACE_(IHVVIDEO, "XboxVmpStartIO IOCTL_VIDEO_SET_CURRENT_MODE\n");
 146
 147             if (RequestPacket->InputBufferLength < sizeof(VIDEO_MODE))
 148             {
 149                 RequestPacket->StatusBlock->Status = ERROR_INSUFFICIENT_BUFFER;
 150                 return TRUE;
 151             }
 152
 153             Result = XboxVmpSetCurrentMode(
 154                 (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension,
 155                 (PVIDEO_MODE)RequestPacket->InputBuffer,
 156                 RequestPacket->StatusBlock);
 157             break;
 158         }
 159
 160         case IOCTL_VIDEO_RESET_DEVICE:
 161         {
 162             TRACE_(IHVVIDEO, "XboxVmpStartIO IOCTL_VIDEO_RESET_DEVICE\n");
 163
 164             Result = XboxVmpResetDevice(
 165                 (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension,
 166                 RequestPacket->StatusBlock);
 167             break;
 168         }
 169
 170         case IOCTL_VIDEO_MAP_VIDEO_MEMORY:
 171         {
 172             TRACE_(IHVVIDEO, "XboxVmpStartIO IOCTL_VIDEO_MAP_VIDEO_MEMORY\n");
 173
 174             if (RequestPacket->OutputBufferLength < sizeof(VIDEO_MEMORY_INFORMATION) ||
 175                 RequestPacket->InputBufferLength < sizeof(VIDEO_MEMORY))
 176             {
 177                 RequestPacket->StatusBlock->Status = ERROR_INSUFFICIENT_BUFFER;
 178                 return TRUE;
 179             }
 180
 181             Result = XboxVmpMapVideoMemory(
 182                 (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension,
 183                 (PVIDEO_MEMORY)RequestPacket->InputBuffer,
 184                 (PVIDEO_MEMORY_INFORMATION)RequestPacket->OutputBuffer,
 185                 RequestPacket->StatusBlock);
 186             break;
 187         }
 188
 189         case IOCTL_VIDEO_UNMAP_VIDEO_MEMORY:
 190         {
 191             TRACE_(IHVVIDEO, "XboxVmpStartIO IOCTL_VIDEO_UNMAP_VIDEO_MEMORY\n");
 192
 193             if (RequestPacket->InputBufferLength < sizeof(VIDEO_MEMORY))
 194             {
 195                 RequestPacket->StatusBlock->Status = ERROR_INSUFFICIENT_BUFFER;
 196                 return TRUE;
 197             }
 198
 199             Result = XboxVmpUnmapVideoMemory(
 200                 (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension,
 201                 (PVIDEO_MEMORY)RequestPacket->InputBuffer,
 202                 RequestPacket->StatusBlock);
 203             break;
 204         }
 205
 206         case IOCTL_VIDEO_QUERY_NUM_AVAIL_MODES:
 207         {
 208             TRACE_(IHVVIDEO, "XboxVmpStartIO IOCTL_VIDEO_QUERY_NUM_AVAIL_MODES\n");
 209
 210             if (RequestPacket->OutputBufferLength < sizeof(VIDEO_NUM_MODES))
 211             {
 212                 RequestPacket->StatusBlock->Status = ERROR_INSUFFICIENT_BUFFER;
 213                 return TRUE;
 214             }
 215
 216             Result = XboxVmpQueryNumAvailModes(
 217                 (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension,
 218                 (PVIDEO_NUM_MODES)RequestPacket->OutputBuffer,
 219                 RequestPacket->StatusBlock);
 220             break;
 221         }
 222
 223         case IOCTL_VIDEO_QUERY_AVAIL_MODES:
 224         {
 225             TRACE_(IHVVIDEO, "XboxVmpStartIO IOCTL_VIDEO_QUERY_AVAIL_MODES\n");
 226
 227             if (RequestPacket->OutputBufferLength < sizeof(VIDEO_MODE_INFORMATION))
 228             {
 229                 RequestPacket->StatusBlock->Status = ERROR_INSUFFICIENT_BUFFER;
 230                 return TRUE;
 231             }
 232
 233             Result = XboxVmpQueryAvailModes(
 234                 (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension,
 235                 (PVIDEO_MODE_INFORMATION)RequestPacket->OutputBuffer,
 236                 RequestPacket->StatusBlock);
 237             break;
 238         }
 239
 240         case IOCTL_VIDEO_QUERY_CURRENT_MODE:
 241         {
 242             TRACE_(IHVVIDEO, "XboxVmpStartIO IOCTL_VIDEO_QUERY_CURRENT_MODE\n");
 243
 244             if (RequestPacket->OutputBufferLength < sizeof(VIDEO_MODE_INFORMATION))
 245             {
 246                 RequestPacket->StatusBlock->Status = ERROR_INSUFFICIENT_BUFFER;
 247                 return TRUE;
 248             }
 249
 250             Result = XboxVmpQueryCurrentMode(
 251                 (PXBOXVMP_DEVICE_EXTENSION)HwDeviceExtension,
 252                 (PVIDEO_MODE_INFORMATION)RequestPacket->OutputBuffer,
 253                 RequestPacket->StatusBlock);
 254             break;
 255         }
 256
 257         default:
 258         {
 259             WARN_(IHVVIDEO, "XboxVmpStartIO 0x%x not implemented\n", RequestPacket->IoControlCode);
 260
 261             RequestPacket->StatusBlock->Status = ERROR_INVALID_FUNCTION;
 262             return FALSE;
 263         }
 264     }
 265
 266     if (Result)
 267     {
 268         RequestPacket->StatusBlock->Status = NO_ERROR;
 269     }
 270
 271     return TRUE;
 272 }
 273
 274 /*
 275  * XboxVmpResetHw
 276  *
 277  * This function is called to reset the hardware to a known state.
 278  */
 279
 280 BOOLEAN
 281 NTAPI
 282 XboxVmpResetHw(
 283     PVOID DeviceExtension,
 284     ULONG Columns,
 285     ULONG Rows)
 286 {
 287     TRACE_(IHVVIDEO, "XboxVmpResetHw\n");
 288
 289     if (!XboxVmpResetDevice((PXBOXVMP_DEVICE_EXTENSION)DeviceExtension, NULL))
 290     {
 291         return FALSE;
 292     }
 293
 294     return TRUE;
 295 }
 296
 297 /*
 298  * XboxVmpGetPowerState
 299  *
 300  * Queries whether the device can support the requested power state.
 301  */
 302
 303 VP_STATUS
 304 NTAPI
 305 XboxVmpGetPowerState(
 306     PVOID HwDeviceExtension,
 307     ULONG HwId,
 308     PVIDEO_POWER_MANAGEMENT VideoPowerControl)
 309 {
 310     ERR_(IHVVIDEO, "XboxVmpGetPowerState is not supported\n");
 311
 312     return ERROR_INVALID_FUNCTION;
 313 }
 314
 315 /*
 316  * XboxVmpSetPowerState
 317  *
 318  * Sets the power state of the specified device
 319  */
 320
 321 VP_STATUS
 322 NTAPI
 323 XboxVmpSetPowerState(
 324     PVOID HwDeviceExtension,
 325     ULONG HwId,
 326     PVIDEO_POWER_MANAGEMENT VideoPowerControl)
 327 {
 328     ERR_(IHVVIDEO, "XboxVmpSetPowerState not supported\n");
 329
 330     return ERROR_INVALID_FUNCTION;
 331 }
 332
 333 /*
 334  * VBESetCurrentMode
 335  *
 336  * Sets the adapter to the specified operating mode.
 337  */
 338
 339 BOOLEAN
 340 FASTCALL
 341 XboxVmpSetCurrentMode(
 342     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 343     PVIDEO_MODE RequestedMode,
 344     PSTATUS_BLOCK StatusBlock)
 345 {
 346     if (RequestedMode->RequestedMode != 0)
 347     {
 348         return FALSE;
 349     }
 350
 351     /* Nothing to do, really. We only support a single mode and we're already
 352      * in that mode
 353      */
 354     return TRUE;
 355 }
 356
 357 /*
 358  * XboxVmpResetDevice
 359  *
 360  * Resets the video hardware to the default mode, to which it was initialized
 361  * at system boot.
 362  */
 363
 364 BOOLEAN
 365 FASTCALL
 366 XboxVmpResetDevice(
 367     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 368     PSTATUS_BLOCK StatusBlock)
 369 {
 370     /* There is nothing to be done here */
 371
 372     return TRUE;
 373 }
 374
 375 /*
 376  * XboxVmpMapVideoMemory
 377  *
 378  * Maps the video hardware frame buffer and video RAM into the virtual address
 379  * space of the requestor.
 380  */
 381
 382 BOOLEAN
 383 FASTCALL
 384 XboxVmpMapVideoMemory(
 385     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 386     PVIDEO_MEMORY RequestedAddress,
 387     PVIDEO_MEMORY_INFORMATION MapInformation,
 388     PSTATUS_BLOCK StatusBlock)
 389 {
 390     PHYSICAL_ADDRESS FrameBuffer;
 391     ULONG inIoSpace = VIDEO_MEMORY_SPACE_MEMORY;
 392
 393     StatusBlock->Information = sizeof(VIDEO_MEMORY_INFORMATION);
 394
 395     /* Reuse framebuffer that was set up by firmware */
 396     FrameBuffer.QuadPart = *((PULONG)((ULONG_PTR)DeviceExtension->VirtControlStart + NV2A_CONTROL_FRAMEBUFFER_ADDRESS_OFFSET));
 397     if (FrameBuffer.QuadPart != 0x3C00000 && FrameBuffer.QuadPart != 0x7C00000)
 398     {
 399         /* Check framebuffer address (high 4 MB of either 64 or 128 MB RAM) */
 400         WARN_(IHVVIDEO, "Non-standard framebuffer address 0x%p\n", FrameBuffer.QuadPart);
 401     }
 402     /* Verify that framebuffer address is page-aligned */
 403     ASSERT(FrameBuffer.QuadPart % PAGE_SIZE == 0);
 404
 405     FrameBuffer.QuadPart += DeviceExtension->PhysFrameBufferStart.QuadPart;
 406     MapInformation->VideoRamBase = RequestedAddress->RequestedVirtualAddress;
 407     /* FIXME: obtain fb size from firmware somehow (Cromwell reserves high 4 MB of RAM) */
 408     MapInformation->VideoRamLength = NV2A_VIDEO_MEMORY_SIZE;
 409
 410     VideoPortMapMemory(
 411         DeviceExtension,
 412         FrameBuffer,
 413         &MapInformation->VideoRamLength,
 414         &inIoSpace,
 415         &MapInformation->VideoRamBase);
 416
 417     MapInformation->FrameBufferBase = MapInformation->VideoRamBase;
 418     MapInformation->FrameBufferLength = MapInformation->VideoRamLength;
 419
 420     /* Tell the nVidia controller about the framebuffer */
 421     *((PULONG)((ULONG_PTR)DeviceExtension->VirtControlStart + NV2A_CONTROL_FRAMEBUFFER_ADDRESS_OFFSET)) = FrameBuffer.u.LowPart;
 422
 423     INFO_(IHVVIDEO, "Mapped 0x%x bytes of phys mem at 0x%lx to virt addr 0x%p\n",
 424         MapInformation->VideoRamLength, FrameBuffer.u.LowPart, MapInformation->VideoRamBase);
 425
 426     return TRUE;
 427 }
 428
 429 /*
 430  * VBEUnmapVideoMemory
 431  *
 432  * Releases a mapping between the virtual address space and the adapter's
 433  * frame buffer and video RAM.
 434  */
 435
 436 BOOLEAN
 437 FASTCALL
 438 XboxVmpUnmapVideoMemory(
 439     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 440     PVIDEO_MEMORY VideoMemory,
 441     PSTATUS_BLOCK StatusBlock)
 442 {
 443     VideoPortUnmapMemory(
 444         DeviceExtension,
 445         VideoMemory->RequestedVirtualAddress,
 446         NULL);
 447
 448     return TRUE;
 449 }
 450
 451 /*
 452  * XboxVmpQueryNumAvailModes
 453  *
 454  * Returns the number of video modes supported by the adapter and the size
 455  * in bytes of the video mode information, which can be used to allocate a
 456  * buffer for an IOCTL_VIDEO_QUERY_AVAIL_MODES request.
 457  */
 458
 459 BOOLEAN
 460 FASTCALL
 461 XboxVmpQueryNumAvailModes(
 462     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 463     PVIDEO_NUM_MODES Modes,
 464     PSTATUS_BLOCK StatusBlock)
 465 {
 466     Modes->NumModes = 1;
 467     Modes->ModeInformationLength = sizeof(VIDEO_MODE_INFORMATION);
 468     StatusBlock->Information = sizeof(VIDEO_NUM_MODES);
 469     return TRUE;
 470 }
 471
 472 /*
 473  * XboxVmpQueryAvailModes
 474  *
 475  * Returns information about each video mode supported by the adapter.
 476  */
 477
 478 BOOLEAN
 479 FASTCALL
 480 XboxVmpQueryAvailModes(
 481     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 482     PVIDEO_MODE_INFORMATION VideoMode,
 483     PSTATUS_BLOCK StatusBlock)
 484 {
 485     return XboxVmpQueryCurrentMode(DeviceExtension, VideoMode, StatusBlock);
 486 }
 487
 488 UCHAR
 489 NvGetCrtc(
 490     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 491     UCHAR Index)
 492 {
 493     *((PUCHAR)((ULONG_PTR)DeviceExtension->VirtControlStart + NV2A_CRTC_REGISTER_INDEX)) = Index;
 494     return *((PUCHAR)((ULONG_PTR)DeviceExtension->VirtControlStart + NV2A_CRTC_REGISTER_VALUE));
 495 }
 496
 497 UCHAR
 498 NvGetBytesPerPixel(
 499     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 500     ULONG ScreenWidth)
 501 {
 502     UCHAR BytesPerPixel;
 503
 504     /* Get BPP directly from NV2A CRTC (magic constants are from Cromwell) */
 505     BytesPerPixel = 8 * (((NvGetCrtc(DeviceExtension, 0x19) & 0xE0) << 3) | (NvGetCrtc(DeviceExtension, 0x13) & 0xFF)) / ScreenWidth;
 506
 507     if (BytesPerPixel == 4)
 508     {
 509         ASSERT((NvGetCrtc(DeviceExtension, 0x28) & 0xF) == BytesPerPixel - 1);
 510     }
 511     else
 512     {
 513         ASSERT((NvGetCrtc(DeviceExtension, 0x28) & 0xF) == BytesPerPixel);
 514     }
 515
 516     return BytesPerPixel;
 517 }
 518
 519 /*
 520  * VBEQueryCurrentMode
 521  *
 522  * Returns information about current video mode.
 523  */
 524
 525 BOOLEAN
 526 FASTCALL
 527 XboxVmpQueryCurrentMode(
 528     PXBOXVMP_DEVICE_EXTENSION DeviceExtension,
 529     PVIDEO_MODE_INFORMATION VideoMode,
 530     PSTATUS_BLOCK StatusBlock)
 531 {
 532     UCHAR BytesPerPixel;
 533
 534     VideoMode->Length = sizeof(VIDEO_MODE_INFORMATION);
 535     VideoMode->ModeIndex = 0;
 536
 537     VideoMode->VisScreenWidth = *((PULONG)((ULONG_PTR)DeviceExtension->VirtControlStart + NV2A_RAMDAC_FP_HVALID_END)) + 1;
 538     VideoMode->VisScreenHeight = *((PULONG)((ULONG_PTR)DeviceExtension->VirtControlStart + NV2A_RAMDAC_FP_VVALID_END)) + 1;
 539
 540     if (VideoMode->VisScreenWidth <= 1 || VideoMode->VisScreenHeight <= 1)
 541     {
 542         ERR_(IHVVIDEO, "Cannot obtain current screen resolution!\n");
 543         return FALSE;
 544     }
 545
 546     BytesPerPixel = NvGetBytesPerPixel(DeviceExtension, VideoMode->VisScreenWidth);
 547     ASSERT(BytesPerPixel >= 1 && BytesPerPixel <= 4);
 548
 549     VideoMode->ScreenStride = VideoMode->VisScreenWidth * BytesPerPixel;
 550     VideoMode->NumberOfPlanes = 1;
 551     VideoMode->BitsPerPlane = BytesPerPixel * 8;
 552     VideoMode->Frequency = 1;
 553     VideoMode->XMillimeter = 0; /* FIXME */
 554     VideoMode->YMillimeter = 0; /* FIXME */
 555     if (BytesPerPixel >= 3)
 556     {
 557         VideoMode->NumberRedBits = 8;
 558         VideoMode->NumberGreenBits = 8;
 559         VideoMode->NumberBlueBits = 8;
 560         VideoMode->RedMask = 0xFF0000;
 561         VideoMode->GreenMask = 0x00FF00;
 562         VideoMode->BlueMask = 0x0000FF;
 563     }
 564     else
 565     {
 566         /* FIXME: not implemented */
 567         WARN_(IHVVIDEO, "BytesPerPixel %d - not implemented\n", BytesPerPixel);
 568     }
 569     VideoMode->VideoMemoryBitmapWidth = VideoMode->VisScreenWidth;
 570     VideoMode->VideoMemoryBitmapHeight = VideoMode->VisScreenHeight;
 571     VideoMode->AttributeFlags = VIDEO_MODE_GRAPHICS | VIDEO_MODE_COLOR |
 572         VIDEO_MODE_NO_OFF_SCREEN;
 573     VideoMode->DriverSpecificAttributeFlags = 0;
 574
 575     StatusBlock->Information = sizeof(VIDEO_MODE_INFORMATION);
 576
 577     /* Verify that screen fits framebuffer size */
 578     if (VideoMode->VisScreenWidth * VideoMode->VisScreenHeight * (VideoMode->BitsPerPlane / 8) > NV2A_VIDEO_MEMORY_SIZE)
 579     {
 580         ERR_(IHVVIDEO, "Current screen resolution exceeds video memory bounds!\n");
 581         return FALSE;
 582     }
 583
 584     return TRUE;
 585 }
 586
 587 /* EOF */