summaryrefslogtreecommitdiffstats
path: root/MdePkg/Library/DxeHobLib/HobLib.c
blob: ed38674466ad2704517f82e5d4b6805acfd70b45 (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
/** @file
  HOB Library implementation for Dxe Phase.

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include <PiDxe.h>

#include <Guid/HobList.h>

#include <Library/HobLib.h>
#include <Library/UefiLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>

VOID  *mHobList = NULL;

/**
  Returns the pointer to the HOB list.

  This function returns the pointer to first HOB in the list.
  For PEI phase, the PEI service GetHobList() can be used to retrieve the pointer
  to the HOB list.  For the DXE phase, the HOB list pointer can be retrieved through
  the EFI System Table by looking up theHOB list GUID in the System Configuration Table.
  Since the System Configuration Table does not exist that the time the DXE Core is
  launched, the DXE Core uses a global variable from the DXE Core Entry Point Library
  to manage the pointer to the HOB list.

  If the pointer to the HOB list is NULL, then ASSERT().

  This function also caches the pointer to the HOB list retrieved.

  @return The pointer to the HOB list.

**/
VOID *
EFIAPI
GetHobList (
  VOID
  )
{
  EFI_STATUS  Status;

  if (mHobList == NULL) {
    Status = EfiGetSystemConfigurationTable (&gEfiHobListGuid, &mHobList);
    ASSERT_EFI_ERROR (Status);
    ASSERT (mHobList != NULL);
  }

  return mHobList;
}

/**
  The constructor function caches the pointer to HOB list by calling GetHobList()
  and 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 successfully gets HobList.

**/
EFI_STATUS
EFIAPI
HobLibConstructor (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  GetHobList ();

  return EFI_SUCCESS;
}

/**
  Returns the next instance of a HOB type from the starting HOB.

  This function searches the first instance of a HOB type from the starting HOB pointer.
  If there does not exist such HOB type from the starting HOB pointer, it will return NULL.
  In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer
  unconditionally: it returns HobStart back if HobStart itself meets the requirement;
  caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.

  If HobStart is NULL, then ASSERT().

  @param  Type          The HOB type to return.
  @param  HobStart      The starting HOB pointer to search from.

  @return The next instance of a HOB type from the starting HOB.

**/
VOID *
EFIAPI
GetNextHob (
  IN UINT16      Type,
  IN CONST VOID  *HobStart
  )
{
  EFI_PEI_HOB_POINTERS  Hob;

  ASSERT (HobStart != NULL);

  Hob.Raw = (UINT8 *)HobStart;
  //
  // Parse the HOB list until end of list or matching type is found.
  //
  while (!END_OF_HOB_LIST (Hob)) {
    if (Hob.Header->HobType == Type) {
      return Hob.Raw;
    }

    Hob.Raw = GET_NEXT_HOB (Hob);
  }

  return NULL;
}

/**
  Returns the first instance of a HOB type among the whole HOB list.

  This function searches the first instance of a HOB type among the whole HOB list.
  If there does not exist such HOB type in the HOB list, it will return NULL.

  If the pointer to the HOB list is NULL, then ASSERT().

  @param  Type          The HOB type to return.

  @return The next instance of a HOB type from the starting HOB.

**/
VOID *
EFIAPI
GetFirstHob (
  IN UINT16  Type
  )
{
  VOID  *HobList;

  HobList = GetHobList ();
  return GetNextHob (Type, HobList);
}

/**
  Returns the next instance of the matched GUID HOB from the starting HOB.

  This function searches the first instance of a HOB from the starting HOB pointer.
  Such HOB should satisfy two conditions:
  its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.
  If there does not exist such HOB from the starting HOB pointer, it will return NULL.
  Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()
  to extract the data section and its size information, respectively.
  In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer
  unconditionally: it returns HobStart back if HobStart itself meets the requirement;
  caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.

  If Guid is NULL, then ASSERT().
  If HobStart is NULL, then ASSERT().

  @param  Guid          The GUID to match with in the HOB list.
  @param  HobStart      A pointer to a Guid.

  @return The next instance of the matched GUID HOB from the starting HOB.

**/
VOID *
EFIAPI
GetNextGuidHob (
  IN CONST EFI_GUID  *Guid,
  IN CONST VOID      *HobStart
  )
{
  EFI_PEI_HOB_POINTERS  GuidHob;

  GuidHob.Raw = (UINT8 *)HobStart;
  while ((GuidHob.Raw = GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION, GuidHob.Raw)) != NULL) {
    if (CompareGuid (Guid, &GuidHob.Guid->Name)) {
      break;
    }

    GuidHob.Raw = GET_NEXT_HOB (GuidHob);
  }

  return GuidHob.Raw;
}

/**
  Returns the first instance of the matched GUID HOB among the whole HOB list.

  This function searches the first instance of a HOB among the whole HOB list.
  Such HOB should satisfy two conditions:
  its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.
  If there does not exist such HOB from the starting HOB pointer, it will return NULL.
  Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()
  to extract the data section and its size information, respectively.

  If the pointer to the HOB list is NULL, then ASSERT().
  If Guid is NULL, then ASSERT().

  @param  Guid          The GUID to match with in the HOB list.

  @return The first instance of the matched GUID HOB among the whole HOB list.

**/
VOID *
EFIAPI
GetFirstGuidHob (
  IN CONST EFI_GUID  *Guid
  )
{
  VOID  *HobList;

  HobList = GetHobList ();
  return GetNextGuidHob (Guid, HobList);
}

/**
  Get the system boot mode from the HOB list.

  This function returns the system boot mode information from the
  PHIT HOB in HOB list.

  If the pointer to the HOB list is NULL, then ASSERT().

  @param  VOID

  @return The Boot Mode.

**/
EFI_BOOT_MODE
EFIAPI
GetBootModeHob (
  VOID
  )
{
  EFI_HOB_HANDOFF_INFO_TABLE  *HandOffHob;

  HandOffHob = (EFI_HOB_HANDOFF_INFO_TABLE *)GetHobList ();

  return HandOffHob->BootMode;
}

/**
  Builds a HOB for a loaded PE32 module.

  This function builds a HOB for a loaded PE32 module.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If ModuleName is NULL, then ASSERT().
  If there is no additional space for HOB creation, then ASSERT().

  @param  ModuleName              The GUID File Name of the module.
  @param  MemoryAllocationModule  The 64 bit physical address of the module.
  @param  ModuleLength            The length of the module in bytes.
  @param  EntryPoint              The 64 bit physical address of the module entry point.

**/
VOID
EFIAPI
BuildModuleHob (
  IN CONST EFI_GUID        *ModuleName,
  IN EFI_PHYSICAL_ADDRESS  MemoryAllocationModule,
  IN UINT64                ModuleLength,
  IN EFI_PHYSICAL_ADDRESS  EntryPoint
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}

/**
  Builds a HOB that describes a chunk of system memory with Owner GUID.

  This function builds a HOB that describes a chunk of system memory.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().

  @param  ResourceType        The type of resource described by this HOB.
  @param  ResourceAttribute   The resource attributes of the memory described by this HOB.
  @param  PhysicalStart       The 64 bit physical address of memory described by this HOB.
  @param  NumberOfBytes       The length of the memory described by this HOB in bytes.
  @param  OwnerGUID           GUID for the owner of this resource.

**/
VOID
EFIAPI
BuildResourceDescriptorWithOwnerHob (
  IN EFI_RESOURCE_TYPE            ResourceType,
  IN EFI_RESOURCE_ATTRIBUTE_TYPE  ResourceAttribute,
  IN EFI_PHYSICAL_ADDRESS         PhysicalStart,
  IN UINT64                       NumberOfBytes,
  IN EFI_GUID                     *OwnerGUID
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}

/**
  Builds a HOB that describes a chunk of system memory.

  This function builds a HOB that describes a chunk of system memory.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().

  @param  ResourceType        The type of resource described by this HOB.
  @param  ResourceAttribute   The resource attributes of the memory described by this HOB.
  @param  PhysicalStart       The 64 bit physical address of memory described by this HOB.
  @param  NumberOfBytes       The length of the memory described by this HOB in bytes.

**/
VOID
EFIAPI
BuildResourceDescriptorHob (
  IN EFI_RESOURCE_TYPE            ResourceType,
  IN EFI_RESOURCE_ATTRIBUTE_TYPE  ResourceAttribute,
  IN EFI_PHYSICAL_ADDRESS         PhysicalStart,
  IN UINT64                       NumberOfBytes
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}

/**
  Builds a customized HOB tagged with a GUID for identification and returns
  the start address of GUID HOB data.

  This function builds a customized HOB tagged with a GUID for identification
  and returns the start address of GUID HOB data so that caller can fill the customized data.
  The HOB Header and Name field is already stripped.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If Guid is NULL, then ASSERT().
  If there is no additional space for HOB creation, then ASSERT().
  If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
  HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.

  @param  Guid          The GUID to tag the customized HOB.
  @param  DataLength    The size of the data payload for the GUID HOB.

  @retval  NULL         The GUID HOB could not be allocated.
  @retval  others       The start address of GUID HOB data.

**/
VOID *
EFIAPI
BuildGuidHob (
  IN CONST EFI_GUID  *Guid,
  IN UINTN           DataLength
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
  return NULL;
}

/**
  Builds a customized HOB tagged with a GUID for identification, copies the input data to the HOB
  data field, and returns the start address of the GUID HOB data.

  This function builds a customized HOB tagged with a GUID for identification and copies the input
  data to the HOB data field and returns the start address of the GUID HOB data.  It can only be
  invoked during PEI phase; for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
  The HOB Header and Name field is already stripped.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If Guid is NULL, then ASSERT().
  If Data is NULL and DataLength > 0, then ASSERT().
  If there is no additional space for HOB creation, then ASSERT().
  If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
  HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.

  @param  Guid          The GUID to tag the customized HOB.
  @param  Data          The data to be copied into the data field of the GUID HOB.
  @param  DataLength    The size of the data payload for the GUID HOB.

  @retval  NULL         The GUID HOB could not be allocated.
  @retval  others       The start address of GUID HOB data.

**/
VOID *
EFIAPI
BuildGuidDataHob (
  IN CONST EFI_GUID  *Guid,
  IN VOID            *Data,
  IN UINTN           DataLength
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
  return NULL;
}

/**
  Builds a Firmware Volume HOB.

  This function builds a Firmware Volume HOB.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().
  If the FvImage buffer is not at its required alignment, then ASSERT().

  @param  BaseAddress   The base address of the Firmware Volume.
  @param  Length        The size of the Firmware Volume in bytes.

**/
VOID
EFIAPI
BuildFvHob (
  IN EFI_PHYSICAL_ADDRESS  BaseAddress,
  IN UINT64                Length
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}

/**
  Builds a EFI_HOB_TYPE_FV2 HOB.

  This function builds a EFI_HOB_TYPE_FV2 HOB.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().
  If the FvImage buffer is not at its required alignment, then ASSERT().

  @param  BaseAddress   The base address of the Firmware Volume.
  @param  Length        The size of the Firmware Volume in bytes.
  @param  FvName        The name of the Firmware Volume.
  @param  FileName      The name of the file.

**/
VOID
EFIAPI
BuildFv2Hob (
  IN          EFI_PHYSICAL_ADDRESS  BaseAddress,
  IN          UINT64                Length,
  IN CONST    EFI_GUID              *FvName,
  IN CONST    EFI_GUID              *FileName
  )
{
  ASSERT (FALSE);
}

/**
  Builds a EFI_HOB_TYPE_FV3 HOB.

  This function builds a EFI_HOB_TYPE_FV3 HOB.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().
  If the FvImage buffer is not at its required alignment, then ASSERT().

  @param BaseAddress            The base address of the Firmware Volume.
  @param Length                 The size of the Firmware Volume in bytes.
  @param AuthenticationStatus   The authentication status.
  @param ExtractedFv            TRUE if the FV was extracted as a file within
                                another firmware volume. FALSE otherwise.
  @param FvName                 The name of the Firmware Volume.
                                Valid only if IsExtractedFv is TRUE.
  @param FileName               The name of the file.
                                Valid only if IsExtractedFv is TRUE.

**/
VOID
EFIAPI
BuildFv3Hob (
  IN          EFI_PHYSICAL_ADDRESS  BaseAddress,
  IN          UINT64                Length,
  IN          UINT32                AuthenticationStatus,
  IN          BOOLEAN               ExtractedFv,
  IN CONST    EFI_GUID              *FvName  OPTIONAL,
  IN CONST    EFI_GUID              *FileName OPTIONAL
  )
{
  ASSERT (FALSE);
}

/**
  Builds a Capsule Volume HOB.

  This function builds a Capsule Volume HOB.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If the platform does not support Capsule Volume HOBs, then ASSERT().
  If there is no additional space for HOB creation, then ASSERT().

  @param  BaseAddress   The base address of the Capsule Volume.
  @param  Length        The size of the Capsule Volume in bytes.

**/
VOID
EFIAPI
BuildCvHob (
  IN EFI_PHYSICAL_ADDRESS  BaseAddress,
  IN UINT64                Length
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}

/**
  Builds a HOB for the CPU.

  This function builds a HOB for the CPU.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().

  @param  SizeOfMemorySpace   The maximum physical memory addressability of the processor.
  @param  SizeOfIoSpace       The maximum physical I/O addressability of the processor.

**/
VOID
EFIAPI
BuildCpuHob (
  IN UINT8  SizeOfMemorySpace,
  IN UINT8  SizeOfIoSpace
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}

/**
  Builds a HOB for the Stack.

  This function builds a HOB for the stack.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().

  @param  BaseAddress   The 64 bit physical address of the Stack.
  @param  Length        The length of the stack in bytes.

**/
VOID
EFIAPI
BuildStackHob (
  IN EFI_PHYSICAL_ADDRESS  BaseAddress,
  IN UINT64                Length
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}

/**
  Builds a HOB for the BSP store.

  This function builds a HOB for BSP store.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().

  @param  BaseAddress   The 64 bit physical address of the BSP.
  @param  Length        The length of the BSP store in bytes.
  @param  MemoryType    Type of memory allocated by this HOB.

**/
VOID
EFIAPI
BuildBspStoreHob (
  IN EFI_PHYSICAL_ADDRESS  BaseAddress,
  IN UINT64                Length,
  IN EFI_MEMORY_TYPE       MemoryType
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}

/**
  Builds a HOB for the memory allocation.

  This function builds a HOB for the memory allocation.
  It can only be invoked during PEI phase;
  for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.

  If there is no additional space for HOB creation, then ASSERT().

  @param  BaseAddress   The 64 bit physical address of the memory.
  @param  Length        The length of the memory allocation in bytes.
  @param  MemoryType    Type of memory allocated by this HOB.

**/
VOID
EFIAPI
BuildMemoryAllocationHob (
  IN EFI_PHYSICAL_ADDRESS  BaseAddress,
  IN UINT64                Length,
  IN EFI_MEMORY_TYPE       MemoryType
  )
{
  //
  // PEI HOB is read only for DXE phase
  //
  ASSERT (FALSE);
}