summaryrefslogtreecommitdiff
path: root/OvmfPkg/QemuVideoDxe/Driver.c
blob: cb3e34970dc0e1efe7f9d449230d150a1758ed8e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
/** @file
  This driver is a sample implementation of the Graphics Output Protocol for
  the QEMU (Cirrus Logic 5446) video controller.

  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>

  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution. The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include "Qemu.h"

EFI_DRIVER_BINDING_PROTOCOL gQemuVideoDriverBinding = {
  QemuVideoControllerDriverSupported,
  QemuVideoControllerDriverStart,
  QemuVideoControllerDriverStop,
  0x10,
  NULL,
  NULL
};

/**
  Check if this device is supported.

  @param  This                   The driver binding protocol.
  @param  Controller             The controller handle to check.
  @param  RemainingDevicePath    The remaining device path.

  @retval EFI_SUCCESS            The bus supports this controller.
  @retval EFI_UNSUPPORTED        This device isn't supported.

**/
EFI_STATUS
EFIAPI
QemuVideoControllerDriverSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     Controller,
  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  )
{
  EFI_STATUS          Status;
  EFI_PCI_IO_PROTOCOL *PciIo;
  PCI_TYPE00          Pci;
  EFI_DEV_PATH        *Node;

  //
  // Open the PCI I/O Protocol
  //
  Status = gBS->OpenProtocol (
                  Controller,
                  &gEfiPciIoProtocolGuid,
                  (VOID **) &PciIo,
                  This->DriverBindingHandle,
                  Controller,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Read the PCI Configuration Header from the PCI Device
  //
  Status = PciIo->Pci.Read (
                        PciIo,
                        EfiPciIoWidthUint32,
                        0,
                        sizeof (Pci) / sizeof (UINT32),
                        &Pci
                        );
  if (EFI_ERROR (Status)) {
    goto Done;
  }

  Status = EFI_UNSUPPORTED;
  //
  // See if the I/O enable is on.  Most systems only allow one VGA device to be turned on
  // at a time, so see if this is one that is turned on.
  //
  //  if (((Pci.Hdr.Command & 0x01) == 0x01)) {
  //
  // See if this is a Cirrus Logic PCI controller
  //
  if (Pci.Hdr.VendorId == CIRRUS_LOGIC_VENDOR_ID) {
    //
    // See if this is a 5430 or a 5446 PCI controller
    //
    if (Pci.Hdr.DeviceId == CIRRUS_LOGIC_5430_DEVICE_ID || 
        Pci.Hdr.DeviceId == CIRRUS_LOGIC_5430_ALTERNATE_DEVICE_ID ||
        Pci.Hdr.DeviceId == CIRRUS_LOGIC_5446_DEVICE_ID) {
        
      Status = EFI_SUCCESS;
      //
      // If this is an Intel 945 graphics controller,
      // go further check RemainingDevicePath validation
      //
      if (RemainingDevicePath != NULL) {
        Node = (EFI_DEV_PATH *) RemainingDevicePath;
        //
        // Check if RemainingDevicePath is the End of Device Path Node, 
        // if yes, return EFI_SUCCESS
        //
        if (!IsDevicePathEnd (Node)) {
          //
          // If RemainingDevicePath isn't the End of Device Path Node,
          // check its validation
          //
          if (Node->DevPath.Type != ACPI_DEVICE_PATH ||
              Node->DevPath.SubType != ACPI_ADR_DP ||
              DevicePathNodeLength(&Node->DevPath) != sizeof(ACPI_ADR_DEVICE_PATH)) {
            Status = EFI_UNSUPPORTED;
          }
        }
      }
    }
  }

Done:
  //
  // Close the PCI I/O Protocol
  //
  gBS->CloseProtocol (
        Controller,
        &gEfiPciIoProtocolGuid,
        This->DriverBindingHandle,
        Controller
        );

  return Status;
}

/**
  Start to process the controller.

  @param  This                   The USB bus driver binding instance.
  @param  Controller             The controller to check.
  @param  RemainingDevicePath    The remaining device patch.

  @retval EFI_SUCCESS            The controller is controlled by the usb bus.
  @retval EFI_ALREADY_STARTED    The controller is already controlled by the usb
                                 bus.
  @retval EFI_OUT_OF_RESOURCES   Failed to allocate resources.

**/
EFI_STATUS
EFIAPI
QemuVideoControllerDriverStart (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     Controller,
  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  )
{
  EFI_STATUS                      Status;
  QEMU_VIDEO_PRIVATE_DATA  *Private;
  BOOLEAN                         PciAttributesSaved;
  EFI_DEVICE_PATH_PROTOCOL        *ParentDevicePath;
  ACPI_ADR_DEVICE_PATH            AcpiDeviceNode;

  PciAttributesSaved = FALSE;
  //
  // Allocate Private context data for GOP inteface.
  //
  Private = AllocateZeroPool (sizeof (QEMU_VIDEO_PRIVATE_DATA));
  if (Private == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto Error;
  }

  //
  // Set up context record
  //
  Private->Signature  = QEMU_VIDEO_PRIVATE_DATA_SIGNATURE;
  Private->Handle     = NULL;

  //
  // Open PCI I/O Protocol
  //
  Status = gBS->OpenProtocol (
                  Controller,
                  &gEfiPciIoProtocolGuid,
                  (VOID **) &Private->PciIo,
                  This->DriverBindingHandle,
                  Controller,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );
  if (EFI_ERROR (Status)) {
    goto Error;
  }

  //
  // Save original PCI attributes
  //
  Status = Private->PciIo->Attributes (
                    Private->PciIo,
                    EfiPciIoAttributeOperationGet,
                    0,
                    &Private->OriginalPciAttributes
                    );

  if (EFI_ERROR (Status)) {
    goto Error;
  }
  PciAttributesSaved = TRUE;

  Status = Private->PciIo->Attributes (
                            Private->PciIo,
                            EfiPciIoAttributeOperationEnable,
                            EFI_PCI_DEVICE_ENABLE | EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY | EFI_PCI_IO_ATTRIBUTE_VGA_IO,
                            NULL
                            );
  if (EFI_ERROR (Status)) {
    goto Error;
  }

  //
  // Get ParentDevicePath
  //
  Status = gBS->HandleProtocol (
                  Controller,
                  &gEfiDevicePathProtocolGuid,
                  (VOID **) &ParentDevicePath
                  );
  if (EFI_ERROR (Status)) {
    goto Error;
  }

  //
  // Set Gop Device Path
  //
  if (RemainingDevicePath == NULL) {
    ZeroMem (&AcpiDeviceNode, sizeof (ACPI_ADR_DEVICE_PATH));
    AcpiDeviceNode.Header.Type = ACPI_DEVICE_PATH;
    AcpiDeviceNode.Header.SubType = ACPI_ADR_DP;
    AcpiDeviceNode.ADR = ACPI_DISPLAY_ADR (1, 0, 0, 1, 0, ACPI_ADR_DISPLAY_TYPE_VGA, 0, 0);
    SetDevicePathNodeLength (&AcpiDeviceNode.Header, sizeof (ACPI_ADR_DEVICE_PATH));

    Private->GopDevicePath = AppendDevicePathNode (
                                        ParentDevicePath,
                                        (EFI_DEVICE_PATH_PROTOCOL *) &AcpiDeviceNode
                                        );
  } else if (!IsDevicePathEnd (RemainingDevicePath)) {
    //
    // If RemainingDevicePath isn't the End of Device Path Node, 
    // only scan the specified device by RemainingDevicePath
    //
    Private->GopDevicePath = AppendDevicePathNode (ParentDevicePath, RemainingDevicePath);
  } else {
    //
    // If RemainingDevicePath is the End of Device Path Node, 
    // don't create child device and return EFI_SUCCESS
    //
    Private->GopDevicePath = NULL;
  }
    
  if (Private->GopDevicePath != NULL) {
    //
    // Creat child handle and device path protocol firstly
    //
    Private->Handle = NULL;
    Status = gBS->InstallMultipleProtocolInterfaces (
                    &Private->Handle,
                    &gEfiDevicePathProtocolGuid,
                    Private->GopDevicePath,
                    NULL
                    );
  }

  //
  // Construct video mode buffer
  //
  Status = QemuVideoVideoModeSetup (Private);
  if (EFI_ERROR (Status)) {
    goto Error;
  }

  if (Private->GopDevicePath == NULL) {
    //
    // If RemainingDevicePath is the End of Device Path Node, 
    // don't create child device and return EFI_SUCCESS
    //
    Status = EFI_SUCCESS;
  } else {

    //
    // Start the GOP software stack.
    //
    Status = QemuVideoGraphicsOutputConstructor (Private);
    ASSERT_EFI_ERROR (Status);

    Status = gBS->InstallMultipleProtocolInterfaces (
                    &Private->Handle,
                    &gEfiGraphicsOutputProtocolGuid,
                    &Private->GraphicsOutput,
                    NULL
                    );
  }

Error:
  if (EFI_ERROR (Status)) {
    if (Private) {
      if (Private->PciIo) {
        if (PciAttributesSaved == TRUE) {
          //
          // Restore original PCI attributes
          //
          Private->PciIo->Attributes (
                          Private->PciIo,
                          EfiPciIoAttributeOperationSet,
                          Private->OriginalPciAttributes,
                          NULL
                          );
        }
        //
        // Close the PCI I/O Protocol
        //
        gBS->CloseProtocol (
              Private->Handle,
              &gEfiPciIoProtocolGuid,
              This->DriverBindingHandle,
              Private->Handle
              );
      }

      gBS->FreePool (Private);
    }
  }

  return Status;
}

/**
  Stop this device

  @param  This                   The USB bus driver binding protocol.
  @param  Controller             The controller to release.
  @param  NumberOfChildren       The number of children of this device that
                                 opened the controller BY_CHILD.
  @param  ChildHandleBuffer      The array of child handle.

  @retval EFI_SUCCESS            The controller or children are stopped.
  @retval EFI_DEVICE_ERROR       Failed to stop the driver.

**/
EFI_STATUS
EFIAPI
QemuVideoControllerDriverStop (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     Controller,
  IN UINTN                          NumberOfChildren,
  IN EFI_HANDLE                     *ChildHandleBuffer
  )
{
  EFI_GRAPHICS_OUTPUT_PROTOCOL    *GraphicsOutput;

  EFI_STATUS                      Status;
  QEMU_VIDEO_PRIVATE_DATA  *Private;

  Status = gBS->OpenProtocol (
                  Controller,
                  &gEfiGraphicsOutputProtocolGuid,
                  (VOID **) &GraphicsOutput,
                  This->DriverBindingHandle,
                  Controller,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Get our private context information
  //
  Private = QEMU_VIDEO_PRIVATE_DATA_FROM_GRAPHICS_OUTPUT_THIS (GraphicsOutput);

  QemuVideoGraphicsOutputDestructor (Private);
  //
  // Remove the GOP protocol interface from the system
  //
  Status = gBS->UninstallMultipleProtocolInterfaces (
                  Private->Handle,
                  &gEfiGraphicsOutputProtocolGuid,
                  &Private->GraphicsOutput,
                  NULL
                  );

  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Restore original PCI attributes
  //
  Private->PciIo->Attributes (
                  Private->PciIo,
                  EfiPciIoAttributeOperationSet,
                  Private->OriginalPciAttributes,
                  NULL
                  );

  //
  // Close the PCI I/O Protocol
  //
  gBS->CloseProtocol (
        Controller,
        &gEfiPciIoProtocolGuid,
        This->DriverBindingHandle,
        Controller
        );

  //
  // Free our instance data
  //
  gBS->FreePool (Private);

  return EFI_SUCCESS;
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description
  @param  Address TODO: add argument description
  @param  Data TODO: add argument description

  TODO: add return values

**/
VOID
outb (
  QEMU_VIDEO_PRIVATE_DATA  *Private,
  UINTN                           Address,
  UINT8                           Data
  )
{
  Private->PciIo->Io.Write (
                      Private->PciIo,
                      EfiPciIoWidthUint8,
                      EFI_PCI_IO_PASS_THROUGH_BAR,
                      Address,
                      1,
                      &Data
                      );
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description
  @param  Address TODO: add argument description
  @param  Data TODO: add argument description

  TODO: add return values

**/
VOID
outw (
  QEMU_VIDEO_PRIVATE_DATA  *Private,
  UINTN                           Address,
  UINT16                          Data
  )
{
  Private->PciIo->Io.Write (
                      Private->PciIo,
                      EfiPciIoWidthUint16,
                      EFI_PCI_IO_PASS_THROUGH_BAR,
                      Address,
                      1,
                      &Data
                      );
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description
  @param  Address TODO: add argument description

  TODO: add return values

**/
UINT8
inb (
  QEMU_VIDEO_PRIVATE_DATA  *Private,
  UINTN                           Address
  )
{
  UINT8 Data;

  Private->PciIo->Io.Read (
                      Private->PciIo,
                      EfiPciIoWidthUint8,
                      EFI_PCI_IO_PASS_THROUGH_BAR,
                      Address,
                      1,
                      &Data
                      );
  return Data;
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description
  @param  Address TODO: add argument description

  TODO: add return values

**/
UINT16
inw (
  QEMU_VIDEO_PRIVATE_DATA  *Private,
  UINTN                           Address
  )
{
  UINT16  Data;

  Private->PciIo->Io.Read (
                      Private->PciIo,
                      EfiPciIoWidthUint16,
                      EFI_PCI_IO_PASS_THROUGH_BAR,
                      Address,
                      1,
                      &Data
                      );
  return Data;
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description
  @param  Index TODO: add argument description
  @param  Red TODO: add argument description
  @param  Green TODO: add argument description
  @param  Blue TODO: add argument description

  TODO: add return values

**/
VOID
SetPaletteColor (
  QEMU_VIDEO_PRIVATE_DATA  *Private,
  UINTN                           Index,
  UINT8                           Red,
  UINT8                           Green,
  UINT8                           Blue
  )
{
  outb (Private, PALETTE_INDEX_REGISTER, (UINT8) Index);
  outb (Private, PALETTE_DATA_REGISTER, (UINT8) (Red >> 2));
  outb (Private, PALETTE_DATA_REGISTER, (UINT8) (Green >> 2));
  outb (Private, PALETTE_DATA_REGISTER, (UINT8) (Blue >> 2));
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description

  TODO: add return values

**/
VOID
SetDefaultPalette (
  QEMU_VIDEO_PRIVATE_DATA  *Private
  )
{
  UINTN Index;
  UINTN RedIndex;
  UINTN GreenIndex;
  UINTN BlueIndex;

  Index = 0;
  for (RedIndex = 0; RedIndex < 8; RedIndex++) {
    for (GreenIndex = 0; GreenIndex < 8; GreenIndex++) {
      for (BlueIndex = 0; BlueIndex < 4; BlueIndex++) {
        SetPaletteColor (Private, Index, (UINT8) (RedIndex << 5), (UINT8) (GreenIndex << 5), (UINT8) (BlueIndex << 6));
        Index++;
      }
    }
  }
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description

  TODO: add return values

**/
VOID
ClearScreen (
  QEMU_VIDEO_PRIVATE_DATA  *Private
  )
{
  UINT32  Color;

  Color = 0;
  Private->PciIo->Mem.Write (
                        Private->PciIo,
                        EfiPciIoWidthFillUint32,
                        0,
                        0,
                        0x400000 >> 2,
                        &Color
                        );
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description

  TODO: add return values

**/
VOID
DrawLogo (
  QEMU_VIDEO_PRIVATE_DATA  *Private,
  UINTN                           ScreenWidth,
  UINTN                           ScreenHeight
  )
{
}

/**
  TODO: Add function description

  @param  Private TODO: add argument description
  @param  ModeData TODO: add argument description

  TODO: add return values

**/
VOID
InitializeGraphicsMode (
  QEMU_VIDEO_PRIVATE_DATA  *Private,
  QEMU_VIDEO_VIDEO_MODES   *ModeData
  )
{
  UINT8 Byte;
  UINTN Index;
  UINT16 DeviceId;
  EFI_STATUS Status;

  Status = Private->PciIo->Pci.Read (
             Private->PciIo,
             EfiPciIoWidthUint16,
             PCI_DEVICE_ID_OFFSET,
             1,
             &DeviceId
             );
  //
  // Read the PCI Configuration Header from the PCI Device
  //
  ASSERT_EFI_ERROR (Status);

  outw (Private, SEQ_ADDRESS_REGISTER, 0x1206);
  outw (Private, SEQ_ADDRESS_REGISTER, 0x0012);

  for (Index = 0; Index < 15; Index++) {
    outw (Private, SEQ_ADDRESS_REGISTER, ModeData->SeqSettings[Index]);
  }

  if (DeviceId != CIRRUS_LOGIC_5446_DEVICE_ID) {
    outb (Private, SEQ_ADDRESS_REGISTER, 0x0f);
    Byte = (UINT8) ((inb (Private, SEQ_DATA_REGISTER) & 0xc7) ^ 0x30);
    outb (Private, SEQ_DATA_REGISTER, Byte);
  }

  outb (Private, MISC_OUTPUT_REGISTER, ModeData->MiscSetting);
  outw (Private, GRAPH_ADDRESS_REGISTER, 0x0506);
  outw (Private, SEQ_ADDRESS_REGISTER, 0x0300);
  outw (Private, CRTC_ADDRESS_REGISTER, 0x2011);

  for (Index = 0; Index < 28; Index++) {
    outw (Private, CRTC_ADDRESS_REGISTER, (UINT16) ((ModeData->CrtcSettings[Index] << 8) | Index));
  }

  for (Index = 0; Index < 9; Index++) {
    outw (Private, GRAPH_ADDRESS_REGISTER, (UINT16) ((GraphicsController[Index] << 8) | Index));
  }

  inb (Private, INPUT_STATUS_1_REGISTER);

  for (Index = 0; Index < 21; Index++) {
    outb (Private, ATT_ADDRESS_REGISTER, (UINT8) Index);
    outb (Private, ATT_ADDRESS_REGISTER, AttributeController[Index]);
  }

  outb (Private, ATT_ADDRESS_REGISTER, 0x20);

  outw (Private, GRAPH_ADDRESS_REGISTER, 0x0009);
  outw (Private, GRAPH_ADDRESS_REGISTER, 0x000a);
  outw (Private, GRAPH_ADDRESS_REGISTER, 0x000b);
  outb (Private, DAC_PIXEL_MASK_REGISTER, 0xff);

  SetDefaultPalette (Private);
  ClearScreen (Private);
}

EFI_STATUS
EFIAPI
InitializeQemuVideo (
  IN EFI_HANDLE           ImageHandle,
  IN EFI_SYSTEM_TABLE     *SystemTable
  )
{
  EFI_STATUS              Status;

  Status = EfiLibInstallDriverBindingComponentName2 (
             ImageHandle,
             SystemTable,
             &gQemuVideoDriverBinding,
             ImageHandle,
             &gQemuVideoComponentName,
             &gQemuVideoComponentName2
             );
  ASSERT_EFI_ERROR (Status);

  //
  // Install EFI Driver Supported EFI Version Protocol required for
  // EFI drivers that are on PCI and other plug in cards.
  //
  gQemuVideoDriverSupportedEfiVersion.FirmwareVersion = PcdGet32 (PcdDriverSupportedEfiVersion);
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &ImageHandle,
                  &gEfiDriverSupportedEfiVersionProtocolGuid,
                  &gQemuVideoDriverSupportedEfiVersion,
                  NULL
                  );
  ASSERT_EFI_ERROR (Status);

  return Status;
}