summaryrefslogtreecommitdiff
path: root/MdePkg/Library/BaseIoLibIntrinsic/IoLibIpf.c
blob: 23ca5c68ed3d83c44a5ab74f6e61c355f318ae9d (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
/** @file
  Common I/O Library routines.

  Copyright (c) 2006 - 2007, Intel Corporation<BR>
  All rights reserved. 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 common header file for this module.
//
#include "BaseIoLibIntrinsicInternal.h"

#define MAP_PORT_BASE_TO_MEM(_Port) \
    ((((_Port) & 0xfffc) << 10) | ((_Port) & 0x0fff))

/**
  Translates I/O port address to memory address.

  This function translates I/O port address to memory address by adding the 64MB
  aligned I/O Port space to the I/O address.
  If I/O Port space base is not 64MB aligned, then ASSERT ().  

  @param  Port  The I/O port to read.

  @return The memory address.

**/
UINTN
InternalGetMemoryMapAddress (
  IN UINTN                  Port
  )
{
  UINTN                     Address;
  UINTN                     IoBlockBaseAddress;

  Address            = MAP_PORT_BASE_TO_MEM (Port);
  IoBlockBaseAddress = PcdGet64(PcdIoBlockBaseAddressForIpf);

  //
  // Make sure that the I/O Port space base is 64MB aligned.
  // 
  ASSERT ((IoBlockBaseAddress & 0x3ffffff) == 0);
  Address += IoBlockBaseAddress;

  return Address;
}

/**
  Reads a 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.

  @param  Port  The I/O port to read.

  @return The value read.

**/
UINT8
EFIAPI
IoRead8 (
  IN  UINT64                 Port
  )
{
  return MmioRead8 (InternalGetMemoryMapAddress (Port));
}

/**
  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.

  @param  Port  The I/O port to read.

  @return The value read.

**/
UINT16
EFIAPI
IoRead16 (
  IN  UINT64                 Port
  )
{
  return MmioRead16 (InternalGetMemoryMapAddress (Port));
}

/**
  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.

  @param  Port  The I/O port to read.

  @return The value read.

**/
UINT32
EFIAPI
IoRead32 (
  IN  UINT64                 Port
  )
{
  return MmioRead32 (InternalGetMemoryMapAddress (Port));
}

/**
  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 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
  )
{
  ASSERT (FALSE);
  return 0;
}

/**
  Writes a 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.

  @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  UINT64                 Port,
  IN  UINT8                  Data
  )
{
  return MmioWrite8 (InternalGetMemoryMapAddress (Port), Data);
}

/**
  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.

  @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  UINT64                 Port,
  IN  UINT16                 Data
  )
{
  return MmioWrite16 (InternalGetMemoryMapAddress (Port), Data);
}

/**
  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.

  @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  UINT64                 Port,
  IN  UINT32                 Data
  )
{
  return MmioWrite32 (InternalGetMemoryMapAddress (Port), Data);
}

/**
  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 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
  )
{
  ASSERT (FALSE);
  return 0;
}

/**
  Reads a 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.

  @param  Address The MMIO register to read.

  @return The value read.

**/
UINT8
EFIAPI
MmioRead8 (
  IN  UINT64                 Address
  )
{
  UINT8            Data;

  Address |= BIT63;

  MemoryFence ();
  Data = *((volatile UINT8 *) Address);
  MemoryFence ();

  return Data;
}

/**
  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.

  @param  Address The MMIO register to read.

  @return The value read.

**/
UINT16
EFIAPI
MmioRead16 (
  IN  UINT64                 Address
  )
{
  UINT16           Data;

  //
  // Make sure that Address is 16-bit aligned.
  // 
  ASSERT ((Address & 1) == 0);

  Address |= BIT63;

  MemoryFence ();
  Data = *((volatile UINT16 *) Address);
  MemoryFence ();

  return Data;
}

/**
  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.

  @param  Address The MMIO register to read.

  @return The value read.

**/
UINT32
EFIAPI
MmioRead32 (
  IN  UINT64                 Address
  )
{
  UINT32           Data;

  //
  // Make sure that Address is 32-bit aligned.
  // 
  ASSERT ((Address & 3) == 0);

  Address |= BIT63;

  MemoryFence ();
  Data = *((volatile UINT32 *) Address);
  MemoryFence ();

  return Data;
}

/**
  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.

  @param  Address The MMIO register to read.

  @return The value read.

**/
UINT64
EFIAPI
MmioRead64 (
  IN  UINT64                 Address
  )
{
  UINT64           Data;

  //
  // Make sure that Address is 64-bit aligned.
  // 
  ASSERT ((Address & 7) == 0);

  Address |= BIT63;

  MemoryFence ();
  Data = *((volatile UINT64 *) Address);
  MemoryFence ();

  return Data;

}

/**
  Writes a 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.

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

  @return The value written the memory address.

**/
UINT8
EFIAPI
MmioWrite8 (
  IN  UINT64                 Address,
  IN  UINT8                  Data
  )
{
  Address |= BIT63;

  MemoryFence ();
  *((volatile UINT8 *) Address) = Data;
  MemoryFence ();

  return Data;
}

/**
  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.

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

  @return The value written the memory address.

**/
UINT16
EFIAPI
MmioWrite16 (
  IN  UINT64                 Address,
  IN  UINT16                 Data
  )
{
  //
  // Make sure that Address is 16-bit aligned.
  // 
  ASSERT ((Address & 1) == 0);

  Address |= BIT63;

  MemoryFence ();
  *((volatile UINT16 *) Address) = Data;
  MemoryFence ();

  return Data;
}

/**
  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.

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

  @return The value written the memory address.

**/
UINT32
EFIAPI
MmioWrite32 (
  IN  UINT64                 Address,
  IN  UINT32                 Data
  )
{
  //
  // Make sure that Address is 32-bit aligned.
  // 
  ASSERT ((Address & 3) == 0);

  Address |= BIT63;

  MemoryFence ();
  *((volatile UINT32 *) Address) = Data;
  MemoryFence ();

  return Data;
}

/**
  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.

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

  @return The value written the memory address.

**/
UINT64
EFIAPI
MmioWrite64 (
  IN  UINT64                 Address,
  IN  UINT64                 Data
  )
{
  //
  // Make sure that Address is 64-bit aligned.
  // 
  ASSERT ((Address & 7) == 0);

  Address |= BIT63;

  MemoryFence ();
  *((volatile UINT64 *) Address) = Data;
  MemoryFence ();

  return Data;
}