summaryrefslogtreecommitdiffstats
path: root/MdePkg/Library/DxeIoLibCpuIo2/IoLib.c
blob: 4182e299dab7c8adb6ff90afce8bae17d0f0ad43 (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
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
/** @file
  I/O Library instance based on EFI_CPU_IO2_PROTOCOL.
  
  Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
  Copyright (c) 2017, AMD Incorporated. 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 "DxeCpuIo2LibInternal.h"

//
// Globle varible to cache pointer to CpuIo2 protocol.
//
EFI_CPU_IO2_PROTOCOL  *mCpuIo = NULL;

/**
  The constructor function caches the pointer to CpuIo2 protocol.

  The constructor function locates CpuIo2 protocol from protocol database.
  It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.

  @param  ImageHandle   The firmware allocated handle for the EFI image.
  @param  SystemTable   A pointer to the EFI System Table.

  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.

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

  Status = gBS->LocateProtocol (&gEfiCpuIo2ProtocolGuid, NULL, (VOID **) &mCpuIo);
  ASSERT_EFI_ERROR (Status);

  return Status;
}

/**
  Reads registers in the EFI CPU I/O space.

  Reads the I/O port specified by Port with registers width specified by Width.
  The read value is returned.

  This function must guarantee that all I/O read and write operations are serialized.
  If such operations are not supported, then ASSERT().

  @param  Port          The base address of the I/O operation.
                        The caller is responsible for aligning the Address if required.
  @param  Width         The width of the I/O operation.

  @return Data read from registers in the EFI CPU I/O space.

**/
UINT64
EFIAPI
IoReadWorker (
  IN      UINTN                      Port,
  IN      EFI_CPU_IO_PROTOCOL_WIDTH  Width
  )
{
  EFI_STATUS  Status;
  UINT64      Data;

  Status = mCpuIo->Io.Read (mCpuIo, Width, Port, 1, &Data);
  ASSERT_EFI_ERROR (Status);

  return Data;
}

/**
  Writes registers in the EFI CPU I/O space.

  Writes the I/O port specified by Port with registers width and value specified by Width
  and Data respectively. Data is returned.

  This function must guarantee that all I/O read and write operations are serialized.
  If such operations are not supported, then ASSERT().

  @param  Port          The base address of the I/O operation.
                        The caller is responsible for aligning the Address if required.
  @param  Width         The width of the I/O operation.
  @param  Data          The value to write to the I/O port.

  @return The parameter of Data.

**/
UINT64
EFIAPI
IoWriteWorker (
  IN      UINTN                      Port,
  IN      EFI_CPU_IO_PROTOCOL_WIDTH  Width,
  IN      UINT64                     Data
  )
{
  EFI_STATUS  Status;

  Status = mCpuIo->Io.Write (mCpuIo, Width, Port, 1, &Data);
  ASSERT_EFI_ERROR (Status);

  return Data;
}

/**
  Reads registers in the EFI CPU I/O space.

  Reads the I/O port specified by Port with registers width specified by Width.
  The port is read Count times, and the read data is stored in the provided Buffer.

  This function must guarantee that all I/O read and write operations are serialized.
  If such operations are not supported, then ASSERT().

  @param  Port          The base address of the I/O operation.
                        The caller is responsible for aligning the Address if required.
  @param  Width         The width of the I/O operation.
  @param  Count         The number of times to read I/O port.
  @param  Buffer        The buffer to store the read data into.

**/
VOID
EFIAPI
IoReadFifoWorker (
  IN      UINTN                      Port,
  IN      EFI_CPU_IO_PROTOCOL_WIDTH  Width,
  IN      UINTN                      Count,
  IN      VOID                       *Buffer
  )
{
  EFI_STATUS  Status;

  Status = mCpuIo->Io.Read (mCpuIo, Width, Port, Count, Buffer);
  ASSERT_EFI_ERROR (Status);
}

/**
  Writes registers in the EFI CPU I/O space.

  Writes the I/O port specified by Port with registers width specified by Width.
  The port is written Count times, and the write data is retrieved from the provided Buffer.

  This function must guarantee that all I/O read and write operations are serialized.
  If such operations are not supported, then ASSERT().

  @param  Port          The base address of the I/O operation.
                        The caller is responsible for aligning the Address if required.
  @param  Width         The width of the I/O operation.
  @param  Count         The number of times to write I/O port.
  @param  Buffer        The buffer to store the read data into.

**/
VOID
EFIAPI
IoWriteFifoWorker (
  IN      UINTN                      Port,
  IN      EFI_CPU_IO_PROTOCOL_WIDTH  Width,
  IN      UINTN                      Count,
  IN      VOID                       *Buffer
  )
{
  EFI_STATUS  Status;

  Status = mCpuIo->Io.Write (mCpuIo, Width, Port, Count, Buffer);
  ASSERT_EFI_ERROR (Status);
}

/**
  Reads memory-mapped registers in the EFI system memory space.

  Reads the MMIO registers specified by Address with registers width specified by Width.
  The read value is returned. If such operations are not supported, then ASSERT().
  This function must guarantee that all MMIO read and write operations are serialized.

  @param  Address       The MMIO register to read.
                        The caller is responsible for aligning the Address if required.
  @param  Width         The width of the I/O operation.

  @return Data read from registers in the EFI system memory space.

**/
UINT64
EFIAPI
MmioReadWorker (
  IN      UINTN                      Address,
  IN      EFI_CPU_IO_PROTOCOL_WIDTH  Width
  )
{
  EFI_STATUS  Status;
  UINT64      Data;

  Status = mCpuIo->Mem.Read (mCpuIo, Width, Address, 1, &Data);
  ASSERT_EFI_ERROR (Status);

  return Data;
}

/**
  Writes memory-mapped registers in the EFI system memory space.

  Writes the MMIO registers specified by Address with registers width and value specified by Width
  and Data respectively. Data is returned. If such operations are not supported, then ASSERT().
  This function must guarantee that all MMIO read and write operations are serialized.

  @param  Address       The MMIO register to read.
                        The caller is responsible for aligning the Address if required.
  @param  Width         The width of the I/O operation.
  @param  Data          The value to write to the I/O port.
  
  @return Data read from registers in the EFI system memory space.

**/
UINT64
EFIAPI
MmioWriteWorker (
  IN      UINTN                      Address,
  IN      EFI_CPU_IO_PROTOCOL_WIDTH  Width,
  IN      UINT64                     Data
  )
{
  EFI_STATUS  Status;

  Status = mCpuIo->Mem.Write (mCpuIo, Width, Address, 1, &Data);
  ASSERT_EFI_ERROR (Status);

  return Data;
}

/**
  Reads an 8-bit I/O port.

  Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.
  This function must guarantee that all I/O read and write operations are
  serialized.

  If 8-bit I/O port operations are not supported, then ASSERT().

  @param  Port  The I/O port to read.

  @return The value read.

**/
UINT8
EFIAPI
IoRead8 (
  IN      UINTN                     Port
  )
{
  return (UINT8)IoReadWorker (Port, EfiCpuIoWidthUint8);
}

/**
  Writes an 8-bit I/O port.

  Writes the 8-bit I/O port specified by Port with the value specified by Value
  and returns Value. This function must guarantee that all I/O read and write
  operations are serialized.

  If 8-bit I/O port operations are not supported, then ASSERT().

  @param  Port  The I/O port to write.
  @param  Value The value to write to the I/O port.

  @return The value written the I/O port.

**/
UINT8
EFIAPI
IoWrite8 (
  IN      UINTN                     Port,
  IN      UINT8                     Value
  )
{
  return (UINT8)IoWriteWorker (Port, EfiCpuIoWidthUint8, Value);
}

/**
  Reads a 16-bit I/O port.

  Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.
  This function must guarantee that all I/O read and write operations are
  serialized.

  If Port is not aligned on a 16-bit boundary, then ASSERT().
 
  If 16-bit I/O port operations are not supported, then ASSERT().

  @param  Port  The I/O port to read.

  @return The value read.

**/
UINT16
EFIAPI
IoRead16 (
  IN      UINTN                     Port
  )
{
  //
  // Make sure Port is aligned on a 16-bit boundary.
  //
  ASSERT ((Port & 1) == 0);
  return (UINT16)IoReadWorker (Port, EfiCpuIoWidthUint16);
}

/**
  Writes a 16-bit I/O port.

  Writes the 16-bit I/O port specified by Port with the value specified by Value
  and returns Value. This function must guarantee that all I/O read and write
  operations are serialized.

  If Port is not aligned on a 16-bit boundary, then ASSERT().

  If 16-bit I/O port operations are not supported, then ASSERT().

  @param  Port  The I/O port to write.
  @param  Value The value to write to the I/O port.

  @return The value written the I/O port.

**/
UINT16
EFIAPI
IoWrite16 (
  IN      UINTN                     Port,
  IN      UINT16                    Value
  )
{
  //
  // Make sure Port is aligned on a 16-bit boundary.
  //
  ASSERT ((Port & 1) == 0);
  return (UINT16)IoWriteWorker (Port, EfiCpuIoWidthUint16, Value);
}

/**
  Reads a 32-bit I/O port.

  Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.
  This function must guarantee that all I/O read and write operations are
  serialized.
 
  If Port is not aligned on a 32-bit boundary, then ASSERT().

  If 32-bit I/O port operations are not supported, then ASSERT().

  @param  Port  The I/O port to read.

  @return The value read.

**/
UINT32
EFIAPI
IoRead32 (
  IN      UINTN                     Port
  )
{
  //
  // Make sure Port is aligned on a 32-bit boundary.
  //
  ASSERT ((Port & 3) == 0);
  return (UINT32)IoReadWorker (Port, EfiCpuIoWidthUint32);
}

/**
  Writes a 32-bit I/O port.

  Writes the 32-bit I/O port specified by Port with the value specified by Value
  and returns Value. This function must guarantee that all I/O read and write
  operations are serialized.

  If Port is not aligned on a 32-bit boundary, then ASSERT().

  If 32-bit I/O port operations are not supported, then ASSERT().

  @param  Port  The I/O port to write.
  @param  Value The value to write to the I/O port.

  @return The value written the I/O port.

**/
UINT32
EFIAPI
IoWrite32 (
  IN      UINTN                     Port,
  IN      UINT32                    Value
  )
{
  //
  // Make sure Port is aligned on a 32-bit boundary.
  //
  ASSERT ((Port & 3) == 0);
  return (UINT32)IoWriteWorker (Port, EfiCpuIoWidthUint32, Value);
}

/**
  Reads a 64-bit I/O port.

  Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.
  This function must guarantee that all I/O read and write operations are
  serialized.

  If Port is not aligned on a 64-bit boundary, then ASSERT().

  If 64-bit I/O port operations are not supported, then ASSERT().

  @param  Port  The I/O port to read.

  @return The value read.

**/
UINT64
EFIAPI
IoRead64 (
  IN      UINTN                     Port
  )
{
  //
  // Make sure Port is aligned on a 64-bit boundary.
  //
  ASSERT ((Port & 7) == 0);
  return IoReadWorker (Port, EfiCpuIoWidthUint64);
}

/**
  Writes a 64-bit I/O port.

  Writes the 64-bit I/O port specified by Port with the value specified by Value
  and returns Value. This function must guarantee that all I/O read and write
  operations are serialized.

  If Port is not aligned on a 64-bit boundary, then ASSERT().
 
  If 64-bit I/O port operations are not supported, then ASSERT().

  @param  Port  The I/O port to write.
  @param  Value The value to write to the I/O port.

  @return The value written the I/O port.

**/
UINT64
EFIAPI
IoWrite64 (
  IN      UINTN                     Port,
  IN      UINT64                    Value
  )
{
  //
  // Make sure Port is aligned on a 64-bit boundary.
  //
  ASSERT ((Port & 7) == 0);
  return IoWriteWorker (Port, EfiCpuIoWidthUint64, Value);
}

/**
  Reads an 8-bit I/O port fifo into a block of memory.

  Reads the 8-bit I/O fifo port specified by Port.
  The port is read Count times, and the read data is
  stored in the provided Buffer.

  This function must guarantee that all I/O read and write operations are
  serialized.

  If 8-bit I/O port operations are not supported, then ASSERT().

  @param  Port    The I/O port to read.
  @param  Count   The number of times to read I/O port.
  @param  Buffer  The buffer to store the read data into.

**/
VOID
EFIAPI
IoReadFifo8 (
  IN      UINTN                     Port,
  IN      UINTN                     Count,
  OUT     VOID                      *Buffer
  )
{
  IoReadFifoWorker (Port, EfiCpuIoWidthFifoUint8, Count, Buffer);
}

/**
  Writes a block of memory into an 8-bit I/O port fifo.

  Writes the 8-bit I/O fifo port specified by Port.
  The port is written Count times, and the write data is
  retrieved from the provided Buffer.

  This function must guarantee that all I/O write and write operations are
  serialized.

  If 8-bit I/O port operations are not supported, then ASSERT().

  @param  Port    The I/O port to write.
  @param  Count   The number of times to write I/O port.
  @param  Buffer  The buffer to retrieve the write data from.

**/
VOID
EFIAPI
IoWriteFifo8 (
  IN      UINTN                     Port,
  IN      UINTN                     Count,
  IN      VOID                      *Buffer
  )
{
  IoWriteFifoWorker (Port, EfiCpuIoWidthFifoUint8, Count, Buffer);
}

/**
  Reads a 16-bit I/O port fifo into a block of memory.

  Reads the 16-bit I/O fifo port specified by Port.
  The port is read Count times, and the read data is
  stored in the provided Buffer.

  This function must guarantee that all I/O read and write operations are
  serialized.

  If 16-bit I/O port operations are not supported, then ASSERT().

  @param  Port    The I/O port to read.
  @param  Count   The number of times to read I/O port.
  @param  Buffer  The buffer to store the read data into.

**/
VOID
EFIAPI
IoReadFifo16 (
  IN      UINTN                     Port,
  IN      UINTN                     Count,
  OUT     VOID                      *Buffer
  )
{
  //
  // Make sure Port is aligned on a 16-bit boundary.
  //
  ASSERT ((Port & 1) == 0);
  IoReadFifoWorker (Port, EfiCpuIoWidthFifoUint16, Count, Buffer);
}

/**
  Writes a block of memory into a 16-bit I/O port fifo.

  Writes the 16-bit I/O fifo port specified by Port.
  The port is written Count times, and the write data is
  retrieved from the provided Buffer.

  This function must guarantee that all I/O write and write operations are
  serialized.

  If 16-bit I/O port operations are not supported, then ASSERT().

  @param  Port    The I/O port to write.
  @param  Count   The number of times to write I/O port.
  @param  Buffer  The buffer to retrieve the write data from.

**/
VOID
EFIAPI
IoWriteFifo16 (
  IN      UINTN                     Port,
  IN      UINTN                     Count,
  IN      VOID                      *Buffer
  )
{
  //
  // Make sure Port is aligned on a 16-bit boundary.
  //
  ASSERT ((Port & 1) == 0);
  IoWriteFifoWorker (Port, EfiCpuIoWidthFifoUint16, Count, Buffer);
}

/**
  Reads a 32-bit I/O port fifo into a block of memory.

  Reads the 32-bit I/O fifo port specified by Port.
  The port is read Count times, and the read data is
  stored in the provided Buffer.

  This function must guarantee that all I/O read and write operations are
  serialized.

  If 32-bit I/O port operations are not supported, then ASSERT().

  @param  Port    The I/O port to read.
  @param  Count   The number of times to read I/O port.
  @param  Buffer  The buffer to store the read data into.

**/
VOID
EFIAPI
IoReadFifo32 (
  IN      UINTN                     Port,
  IN      UINTN                     Count,
  OUT     VOID                      *Buffer
  )
{
  //
  // Make sure Port is aligned on a 32-bit boundary.
  //
  ASSERT ((Port & 3) == 0);
  IoReadFifoWorker (Port, EfiCpuIoWidthFifoUint32, Count, Buffer);
}

/**
  Writes a block of memory into a 32-bit I/O port fifo.

  Writes the 32-bit I/O fifo port specified by Port.
  The port is written Count times, and the write data is
  retrieved from the provided Buffer.

  This function must guarantee that all I/O write and write operations are
  serialized.

  If 32-bit I/O port operations are not supported, then ASSERT().

  @param  Port    The I/O port to write.
  @param  Count   The number of times to write I/O port.
  @param  Buffer  The buffer to retrieve the write data from.

**/
VOID
EFIAPI
IoWriteFifo32 (
  IN      UINTN                     Port,
  IN      UINTN                     Count,
  IN      VOID                      *Buffer
  )
{
  //
  // Make sure Port is aligned on a 32-bit boundary.
  //
  ASSERT ((Port & 3) == 0);
  IoWriteFifoWorker (Port, EfiCpuIoWidthFifoUint32, Count, Buffer);
}

/**
  Reads an 8-bit MMIO register.

  Reads the 8-bit MMIO register specified by Address. The 8-bit read value is
  returned. This function must guarantee that all MMIO read and write
  operations are serialized.

  If 8-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to read.

  @return The value read.

**/
UINT8
EFIAPI
MmioRead8 (
  IN      UINTN                     Address
  )
{
  return (UINT8)MmioReadWorker (Address, EfiCpuIoWidthUint8);
}

/**
  Writes an 8-bit MMIO register.

  Writes the 8-bit MMIO register specified by Address with the value specified
  by Value and returns Value. This function must guarantee that all MMIO read
  and write operations are serialized.

  If 8-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to write.
  @param  Value   The value to write to the MMIO register.

**/
UINT8
EFIAPI
MmioWrite8 (
  IN      UINTN                     Address,
  IN      UINT8                     Value
  )
{
  return (UINT8)MmioWriteWorker (Address, EfiCpuIoWidthUint8, Value);
}

/**
  Reads a 16-bit MMIO register.

  Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
  returned. This function must guarantee that all MMIO read and write
  operations are serialized.

  If Address is not aligned on a 16-bit boundary, then ASSERT().
 
  If 16-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to read.

  @return The value read.

**/
UINT16
EFIAPI
MmioRead16 (
  IN      UINTN                     Address
  )
{
  //
  // Make sure Address is aligned on a 16-bit boundary.
  //
  ASSERT ((Address & 1) == 0);
  return (UINT16)MmioReadWorker (Address, EfiCpuIoWidthUint16);
}

/**
  Writes a 16-bit MMIO register.

  Writes the 16-bit MMIO register specified by Address with the value specified
  by Value and returns Value. This function must guarantee that all MMIO read
  and write operations are serialized.

  If Address is not aligned on a 16-bit boundary, then ASSERT().
 
  If 16-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to write.
  @param  Value   The value to write to the MMIO register.

**/
UINT16
EFIAPI
MmioWrite16 (
  IN      UINTN                     Address,
  IN      UINT16                    Value
  )
{
  //
  // Make sure Address is aligned on a 16-bit boundary.
  //
  ASSERT ((Address & 1) == 0);
  return (UINT16)MmioWriteWorker (Address, EfiCpuIoWidthUint16, Value);
}

/**
  Reads a 32-bit MMIO register.

  Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
  returned. This function must guarantee that all MMIO read and write
  operations are serialized.

  If Address is not aligned on a 32-bit boundary, then ASSERT().
  
  If 32-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to read.

  @return The value read.

**/
UINT32
EFIAPI
MmioRead32 (
  IN      UINTN                     Address
  )
{
  //
  // Make sure Address is aligned on a 32-bit boundary.
  //
  ASSERT ((Address & 3) == 0);
  return (UINT32)MmioReadWorker (Address, EfiCpuIoWidthUint32);
}

/**
  Writes a 32-bit MMIO register.

  Writes the 32-bit MMIO register specified by Address with the value specified
  by Value and returns Value. This function must guarantee that all MMIO read
  and write operations are serialized.

  If Address is not aligned on a 32-bit boundary, then ASSERT().
 
  If 32-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to write.
  @param  Value   The value to write to the MMIO register.

**/
UINT32
EFIAPI
MmioWrite32 (
  IN      UINTN                     Address,
  IN      UINT32                    Value
  )
{
  //
  // Make sure Address is aligned on a 32-bit boundary.
  //
  ASSERT ((Address & 3) == 0);
  return (UINT32)MmioWriteWorker (Address, EfiCpuIoWidthUint32, Value);
}

/**
  Reads a 64-bit MMIO register.

  Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
  returned. This function must guarantee that all MMIO read and write
  operations are serialized.

  If Address is not aligned on a 64-bit boundary, then ASSERT().
 
  If 64-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to read.

  @return The value read.

**/
UINT64
EFIAPI
MmioRead64 (
  IN      UINTN                     Address
  )
{
  //
  // Make sure Address is aligned on a 64-bit boundary.
  //
  ASSERT ((Address & 7) == 0);
  return (UINT64)MmioReadWorker (Address, EfiCpuIoWidthUint64);
}

/**
  Writes a 64-bit MMIO register.

  Writes the 64-bit MMIO register specified by Address with the value specified
  by Value and returns Value. This function must guarantee that all MMIO read
  and write operations are serialized.

  If Address is not aligned on a 64-bit boundary, then ASSERT().
 
  If 64-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to write.
  @param  Value   The value to write to the MMIO register.

**/
UINT64
EFIAPI
MmioWrite64 (
  IN      UINTN                     Address,
  IN      UINT64                    Value
  )
{
  //
  // Make sure Address is aligned on a 64-bit boundary.
  //
  ASSERT ((Address & 7) == 0);
  return (UINT64)MmioWriteWorker (Address, EfiCpuIoWidthUint64, Value);
}