summaryrefslogtreecommitdiff
path: root/Nt32Pkg/CpuRuntimeDxe/Cpu.c
blob: d8d63d3da9408f7d813d7f16e96f2437e4f32a4f (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
/**@file

Copyright (c) 2006 - 2007, Intel Corporation
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.

Module Name:

  Cpu.c

Abstract:

  NT Emulation Architectural Protocol Driver as defined in Tiano.
  This CPU module abstracts the interrupt subsystem of a platform and
  the CPU-specific setjump/long pair.  Other services are not implemented
  in this driver.

**/


#include "CpuDriver.h"


CPU_ARCH_PROTOCOL_PRIVATE mCpuTemplate = {
  CPU_ARCH_PROT_PRIVATE_SIGNATURE,
  NULL,
  {
    WinNtFlushCpuDataCache,
    WinNtEnableInterrupt,
    WinNtDisableInterrupt,
    WinNtGetInterruptState,
    WinNtInit,
    WinNtRegisterInterruptHandler,
    WinNtGetTimerValue,
    WinNtSetMemoryAttributes,
    0,
    4
  },
  {
    CpuMemoryServiceRead,
    CpuMemoryServiceWrite,
    CpuIoServiceRead,
    CpuIoServiceWrite
  },
  0,
  TRUE
};

#define EFI_CPU_DATA_MAXIMUM_LENGTH 0x100



typedef union {
  EFI_CPU_DATA_RECORD *DataRecord;
  UINT8               *Raw;
} EFI_CPU_DATA_RECORD_BUFFER;

EFI_SUBCLASS_TYPE1_HEADER mCpuDataRecordHeader = {
  EFI_PROCESSOR_SUBCLASS_VERSION,       // Version
  sizeof (EFI_SUBCLASS_TYPE1_HEADER),   // Header Size
  0,                                    // Instance, Initialize later
  EFI_SUBCLASS_INSTANCE_NON_APPLICABLE, // SubInstance
  0                                     // RecordType, Initialize later
};

//
// Service routines for the driver
//
EFI_STATUS
EFIAPI
WinNtFlushCpuDataCache (
  IN EFI_CPU_ARCH_PROTOCOL  *This,
  IN EFI_PHYSICAL_ADDRESS   Start,
  IN UINT64                 Length,
  IN EFI_CPU_FLUSH_TYPE     FlushType
  )
/*++

Routine Description:

  This routine would provide support for flushing the CPU data cache.
  In the case of NT emulation environment, this flushing is not necessary and
  is thus not implemented.

Arguments:

  Pointer to CPU Architectural Protocol interface
  Start adddress in memory to flush
  Length of memory to flush
  Flush type

Returns:

  Status
    EFI_SUCCESS

--*/
// TODO:    This - add argument and description to function comment
// TODO:    FlushType - add argument and description to function comment
// TODO:    EFI_UNSUPPORTED - add return value to function comment
{
  if (FlushType == EfiCpuFlushTypeWriteBackInvalidate) {
    //
    // Only WB flush is supported. We actually need do nothing on NT emulator
    // environment. Classify this to follow EFI spec
    //
    return EFI_SUCCESS;
  }
  //
  // Other flush types are not supported by NT emulator
  //
  return EFI_UNSUPPORTED;
}


EFI_STATUS
EFIAPI
WinNtEnableInterrupt (
  IN EFI_CPU_ARCH_PROTOCOL  *This
  )
/*++

Routine Description:

  This routine provides support for emulation of the interrupt enable of the
  the system.  For our purposes, CPU enable is just a BOOLEAN that the Timer
  Architectural Protocol observes in order to defer behaviour while in its
  emulated interrupt, or timer tick.

Arguments:

  Pointer to CPU Architectural Protocol interface

Returns:

  Status
    EFI_SUCCESS

--*/
// TODO:    This - add argument and description to function comment
{
  CPU_ARCH_PROTOCOL_PRIVATE *Private;

  Private                 = CPU_ARCH_PROTOCOL_PRIVATE_DATA_FROM_THIS (This);
  Private->InterruptState = TRUE;
  return EFI_SUCCESS;
}


EFI_STATUS
EFIAPI
WinNtDisableInterrupt (
  IN EFI_CPU_ARCH_PROTOCOL  *This
  )
/*++

Routine Description:

  This routine provides support for emulation of the interrupt disable of the
  the system.  For our purposes, CPU enable is just a BOOLEAN that the Timer
  Architectural Protocol observes in order to defer behaviour while in its
  emulated interrupt, or timer tick.

Arguments:

  Pointer to CPU Architectural Protocol interface

Returns:

  Status
    EFI_SUCCESS

--*/
// TODO:    This - add argument and description to function comment
{
  CPU_ARCH_PROTOCOL_PRIVATE *Private;

  Private                 = CPU_ARCH_PROTOCOL_PRIVATE_DATA_FROM_THIS (This);
  Private->InterruptState = FALSE;
  return EFI_SUCCESS;
}


EFI_STATUS
EFIAPI
WinNtGetInterruptState (
  IN EFI_CPU_ARCH_PROTOCOL  *This,
  OUT BOOLEAN               *State
  )
/*++

Routine Description:

  This routine provides support for emulation of the interrupt disable of the
  the system.  For our purposes, CPU enable is just a BOOLEAN that the Timer
  Architectural Protocol observes in order to defer behaviour while in its
  emulated interrupt, or timer tick.

Arguments:

  Pointer to CPU Architectural Protocol interface

Returns:

  Status
    EFI_SUCCESS

--*/
// TODO:    This - add argument and description to function comment
// TODO:    State - add argument and description to function comment
// TODO:    EFI_INVALID_PARAMETER - add return value to function comment
{
  CPU_ARCH_PROTOCOL_PRIVATE *Private;

  if (State == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  Private = CPU_ARCH_PROTOCOL_PRIVATE_DATA_FROM_THIS (This);
  *State  = Private->InterruptState;
  return EFI_SUCCESS;
}


EFI_STATUS
EFIAPI
WinNtInit (
  IN EFI_CPU_ARCH_PROTOCOL  *This,
  IN EFI_CPU_INIT_TYPE      InitType
  )
/*++

Routine Description:

  This routine would support generation of a CPU INIT.  At
  present, this code does not provide emulation.

Arguments:

  Pointer to CPU Architectural Protocol interface
  INIT Type

Returns:

  Status
    EFI_UNSUPPORTED - not yet implemented

--*/
// TODO:    This - add argument and description to function comment
// TODO:    InitType - add argument and description to function comment
{
  return EFI_UNSUPPORTED;
}


EFI_STATUS
EFIAPI
WinNtRegisterInterruptHandler (
  IN EFI_CPU_ARCH_PROTOCOL      *This,
  IN EFI_EXCEPTION_TYPE         InterruptType,
  IN EFI_CPU_INTERRUPT_HANDLER  InterruptHandler
  )
/*++

Routine Description:

  This routine would support registration of an interrupt handler.  At
  present, this code does not provide emulation.

Arguments:

  Pointer to CPU Architectural Protocol interface
  Pointer to interrupt handlers
  Interrupt type

Returns:

  Status
    EFI_UNSUPPORTED - not yet implemented

--*/
// TODO:    This - add argument and description to function comment
// TODO:    InterruptType - add argument and description to function comment
// TODO:    InterruptHandler - add argument and description to function comment
{

  //
  // Do parameter checking for EFI spec conformance
  //
  if (InterruptType < 0 || InterruptType > 0xff) {
    return EFI_UNSUPPORTED;
  }
  //
  // Do nothing for Nt32 emulation
  //
  return EFI_UNSUPPORTED;
}


EFI_STATUS
EFIAPI
WinNtGetTimerValue (
  IN  EFI_CPU_ARCH_PROTOCOL *This,
  IN  UINT32                TimerIndex,
  OUT UINT64                *TimerValue,
  OUT UINT64                *TimerPeriod OPTIONAL
  )
/*++

Routine Description:

  This routine would support querying of an on-CPU timer.  At present,
  this code does not provide timer emulation.

Arguments:

  This        - Pointer to CPU Architectural Protocol interface
  TimerIndex  - Index of given CPU timer
  TimerValue  - Output of the timer
  TimerPeriod - Output of the timer period

Returns:

  EFI_UNSUPPORTED       - not yet implemented
  EFI_INVALID_PARAMETER - TimeValue is NULL

--*/
{
  if (TimerValue == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // No timer supported
  //
  return EFI_UNSUPPORTED;
}


EFI_STATUS
EFIAPI
WinNtSetMemoryAttributes (
  IN EFI_CPU_ARCH_PROTOCOL  *This,
  IN EFI_PHYSICAL_ADDRESS   BaseAddress,
  IN UINT64                 Length,
  IN UINT64                 Attributes
  )
/*++

Routine Description:

  This routine would support querying of an on-CPU timer.  At present,
  this code does not provide timer emulation.

Arguments:

  Pointer to CPU Architectural Protocol interface
  Start address of memory region
  The size in bytes of the memory region
  The bit mask of attributes to set for the memory region

Returns:

  Status
    EFI_UNSUPPORTED - not yet implemented

--*/
// TODO:    This - add argument and description to function comment
// TODO:    BaseAddress - add argument and description to function comment
// TODO:    Length - add argument and description to function comment
// TODO:    Attributes - add argument and description to function comment
// TODO:    EFI_INVALID_PARAMETER - add return value to function comment
{
  //
  // Check for invalid parameter for Spec conformance
  //
  if (Length == 0) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Do nothing for Nt32 emulation
  //
  return EFI_UNSUPPORTED;
}


VOID
CpuUpdateDataHub (
  VOID
  )
/*++

Routine Description:
  This function will log processor version and frequency data to data hub.

Arguments:
  Event        - Event whose notification function is being invoked.
  Context      - Pointer to the notification function's context.

Returns:
  None.

--*/
{
  EFI_STATUS                  Status;
  EFI_CPU_DATA_RECORD_BUFFER  RecordBuffer;
  UINT32                      HeaderSize;
  UINT32                      TotalSize;
  EFI_DATA_HUB_PROTOCOL       *DataHub;
  EFI_HII_HANDLE              HiiHandle;

  //
  // Locate DataHub protocol.
  //
  Status = gBS->LocateProtocol (&gEfiDataHubProtocolGuid, NULL, (VOID**)&DataHub);
  if (EFI_ERROR (Status)) {
    return;
  }

  //
  // Initialize data record header
  //
  mCpuDataRecordHeader.Instance = 1;
  HeaderSize                    = sizeof (EFI_SUBCLASS_TYPE1_HEADER);

  RecordBuffer.Raw              = AllocatePool (HeaderSize + EFI_CPU_DATA_MAXIMUM_LENGTH);
  if (RecordBuffer.Raw == NULL) {
    return ;
  }

  //
  // Initialize strings to HII database
  //
  HiiHandle = HiiAddPackages (
                &gEfiProcessorProducerGuid,
                NULL,
                CpuStrings,
                NULL
                );
  ASSERT (HiiHandle != NULL);

  CopyMem (RecordBuffer.Raw, &mCpuDataRecordHeader, HeaderSize);


  RecordBuffer.DataRecord->DataRecordHeader.RecordType      = ProcessorVersionRecordType;
  RecordBuffer.DataRecord->VariableRecord.ProcessorVersion  = STRING_TOKEN (STR_PROCESSOR_VERSION);
  TotalSize = HeaderSize + sizeof (EFI_PROCESSOR_VERSION_DATA);

  Status = DataHub->LogData (
                      DataHub,
                      &gEfiProcessorSubClassGuid,
                      &gEfiProcessorProducerGuid,
                      EFI_DATA_RECORD_CLASS_DATA,
                      RecordBuffer.Raw,
                      TotalSize
                      );

  //
  // Store CPU frequency data record to data hub - It's an emulator so make up a value
  //
  RecordBuffer.DataRecord->DataRecordHeader.RecordType                    = ProcessorCoreFrequencyRecordType;
  RecordBuffer.DataRecord->VariableRecord.ProcessorCoreFrequency.Value    = 1234;
  RecordBuffer.DataRecord->VariableRecord.ProcessorCoreFrequency.Exponent = 6;
  TotalSize = HeaderSize + sizeof (EFI_PROCESSOR_CORE_FREQUENCY_DATA);

  Status = DataHub->LogData (
                      DataHub,
                      &gEfiProcessorSubClassGuid,
                      &gEfiProcessorProducerGuid,
                      EFI_DATA_RECORD_CLASS_DATA,
                      RecordBuffer.Raw,
                      TotalSize
                      );

  FreePool (RecordBuffer.Raw);
}



EFI_STATUS
EFIAPI
InitializeCpu (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
/*++

Routine Description:

  Initialize the state information for the CPU Architectural Protocol

Arguments:

  ImageHandle of the loaded driver
  Pointer to the System Table

Returns:

  Status

  EFI_SUCCESS           - protocol instance can be published
  EFI_OUT_OF_RESOURCES  - cannot allocate protocol data structure
  EFI_DEVICE_ERROR      - cannot create the thread

--*/
{
  EFI_STATUS                Status;

  CpuUpdateDataHub ();

  Status = gBS->InstallMultipleProtocolInterfaces (
                  &mCpuTemplate.Handle,
                  &gEfiCpuArchProtocolGuid,   &mCpuTemplate.Cpu,
                  &gEfiCpuIoProtocolGuid,     &mCpuTemplate.CpuIo,
                  NULL
                  );
  ASSERT_EFI_ERROR (Status);

  return Status;
}