1 /** @file
2 PCD DXE driver manage all PCD entry initialized in PEI phase and DXE phase, and
3 produce the implementation of native PCD protocol and EFI_PCD_PROTOCOL defined in
4 PI 1.2 Vol3.
5
6 Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
7 This program and the accompanying materials
8 are licensed and made available under the terms and conditions of the BSD License
9 which accompanies this distribution. The full text of the license may be found at
10 http://opensource.org/licenses/bsd-license.php
11
12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
14
15 **/
16
17 #include "Service.h"
18
19 ///
20 /// PCD database lock.
21 ///
22 EFI_LOCK mPcdDatabaseLock = EFI_INITIALIZE_LOCK_VARIABLE(TPL_NOTIFY);
23
24 ///
25 /// PCD_PROTOCOL the EDKII native implementation which support dynamic
26 /// type and dynamicEx type PCDs.
27 ///
28 PCD_PROTOCOL mPcdInstance = {
29 DxePcdSetSku,
30
31 DxePcdGet8,
32 DxePcdGet16,
33 DxePcdGet32,
34 DxePcdGet64,
35 DxePcdGetPtr,
36 DxePcdGetBool,
37 DxePcdGetSize,
38
39 DxePcdGet8Ex,
40 DxePcdGet16Ex,
41 DxePcdGet32Ex,
42 DxePcdGet64Ex,
43 DxePcdGetPtrEx,
44 DxePcdGetBoolEx,
45 DxePcdGetSizeEx,
46
47 DxePcdSet8,
48 DxePcdSet16,
49 DxePcdSet32,
50 DxePcdSet64,
51 DxePcdSetPtr,
52 DxePcdSetBool,
53
54 DxePcdSet8Ex,
55 DxePcdSet16Ex,
56 DxePcdSet32Ex,
57 DxePcdSet64Ex,
58 DxePcdSetPtrEx,
59 DxePcdSetBoolEx,
60
61 DxeRegisterCallBackOnSet,
62 DxeUnRegisterCallBackOnSet,
63 DxePcdGetNextToken,
64 DxePcdGetNextTokenSpace
65 };
66
67 ///
68 /// EFI_PCD_PROTOCOL is defined in PI 1.2 Vol 3 which only support dynamicEx type
69 /// PCD.
70 ///
71 EFI_PCD_PROTOCOL mEfiPcdInstance = {
72 DxePcdSetSku,
73 DxePcdGet8Ex,
74 DxePcdGet16Ex,
75 DxePcdGet32Ex,
76 DxePcdGet64Ex,
77 DxePcdGetPtrEx,
78 DxePcdGetBoolEx,
79 DxePcdGetSizeEx,
80 DxePcdSet8Ex,
81 DxePcdSet16Ex,
82 DxePcdSet32Ex,
83 DxePcdSet64Ex,
84 DxePcdSetPtrEx,
85 DxePcdSetBoolEx,
86 (EFI_PCD_PROTOCOL_CALLBACK_ON_SET) DxeRegisterCallBackOnSet,
87 (EFI_PCD_PROTOCOL_CANCEL_CALLBACK) DxeUnRegisterCallBackOnSet,
88 DxePcdGetNextToken,
89 DxePcdGetNextTokenSpace
90 };
91
92 ///
93 /// Instance of GET_PCD_INFO_PROTOCOL protocol is EDKII native implementation.
94 /// This protocol instance support dynamic and dynamicEx type PCDs.
95 ///
96 GET_PCD_INFO_PROTOCOL mGetPcdInfoInstance = {
97 DxeGetPcdInfoGetInfo,
98 DxeGetPcdInfoGetInfoEx,
99 DxeGetPcdInfoGetSku
100 };
101
102 ///
103 /// Instance of EFI_GET_PCD_INFO_PROTOCOL which is defined in PI 1.2.1 Vol 3.
104 /// This PPI instance only support dyanmicEx type PCD.
105 ///
106 EFI_GET_PCD_INFO_PROTOCOL mEfiGetPcdInfoInstance = {
107 DxeGetPcdInfoGetInfoEx,
108 DxeGetPcdInfoGetSku
109 };
110
111 EFI_HANDLE mPcdHandle = NULL;
112
113 /**
114 Main entry for PCD DXE driver.
115
116 This routine initialize the PCD database and install PCD_PROTOCOL.
117
118 @param ImageHandle Image handle for PCD DXE driver.
119 @param SystemTable Pointer to SystemTable.
120
121 @return Status of gBS->InstallProtocolInterface()
122
123 **/
124 EFI_STATUS
125 EFIAPI
PcdDxeInit(IN EFI_HANDLE ImageHandle,IN EFI_SYSTEM_TABLE * SystemTable)126 PcdDxeInit (
127 IN EFI_HANDLE ImageHandle,
128 IN EFI_SYSTEM_TABLE *SystemTable
129 )
130 {
131 EFI_STATUS Status;
132 VOID *Registration;
133
134 //
135 // Make sure the Pcd Protocol is not already installed in the system
136 //
137
138 ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gPcdProtocolGuid);
139
140 BuildPcdDxeDataBase ();
141
142 //
143 // Install PCD_PROTOCOL to handle dynamic type PCD
144 // Install EFI_PCD_PROTOCOL to handle dynamicEx type PCD
145 //
146 Status = gBS->InstallMultipleProtocolInterfaces (
147 &mPcdHandle,
148 &gPcdProtocolGuid, &mPcdInstance,
149 &gEfiPcdProtocolGuid, &mEfiPcdInstance,
150 NULL
151 );
152 ASSERT_EFI_ERROR (Status);
153
154 //
155 // Install GET_PCD_INFO_PROTOCOL to handle dynamic type PCD
156 // Install EFI_GET_PCD_INFO_PROTOCOL to handle dynamicEx type PCD
157 //
158 Status = gBS->InstallMultipleProtocolInterfaces (
159 &mPcdHandle,
160 &gGetPcdInfoProtocolGuid, &mGetPcdInfoInstance,
161 &gEfiGetPcdInfoProtocolGuid, &mEfiGetPcdInfoInstance,
162 NULL
163 );
164 ASSERT_EFI_ERROR (Status);
165
166 //
167 // Register callback function upon VariableLockProtocol
168 // to lock the variables referenced by DynamicHii PCDs with RO property set in *.dsc.
169 //
170 EfiCreateProtocolNotifyEvent (
171 &gEdkiiVariableLockProtocolGuid,
172 TPL_CALLBACK,
173 VariableLockCallBack,
174 NULL,
175 &Registration
176 );
177
178 return Status;
179 }
180
181 /**
182 Retrieve additional information associated with a PCD token in the default token space.
183
184 This includes information such as the type of value the TokenNumber is associated with as well as possible
185 human readable name that is associated with the token.
186
187 @param[in] TokenNumber The PCD token number.
188 @param[out] PcdInfo The returned information associated with the requested TokenNumber.
189 The caller is responsible for freeing the buffer that is allocated by callee for PcdInfo->PcdName.
190
191 @retval EFI_SUCCESS The PCD information was returned successfully.
192 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
193 **/
194 EFI_STATUS
195 EFIAPI
DxeGetPcdInfoGetInfo(IN UINTN TokenNumber,OUT EFI_PCD_INFO * PcdInfo)196 DxeGetPcdInfoGetInfo (
197 IN UINTN TokenNumber,
198 OUT EFI_PCD_INFO *PcdInfo
199 )
200 {
201 return DxeGetPcdInfo (NULL, TokenNumber, PcdInfo);
202 }
203
204 /**
205 Retrieve additional information associated with a PCD token.
206
207 This includes information such as the type of value the TokenNumber is associated with as well as possible
208 human readable name that is associated with the token.
209
210 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
211 @param[in] TokenNumber The PCD token number.
212 @param[out] PcdInfo The returned information associated with the requested TokenNumber.
213 The caller is responsible for freeing the buffer that is allocated by callee for PcdInfo->PcdName.
214
215 @retval EFI_SUCCESS The PCD information was returned successfully.
216 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
217 **/
218 EFI_STATUS
219 EFIAPI
DxeGetPcdInfoGetInfoEx(IN CONST EFI_GUID * Guid,IN UINTN TokenNumber,OUT EFI_PCD_INFO * PcdInfo)220 DxeGetPcdInfoGetInfoEx (
221 IN CONST EFI_GUID *Guid,
222 IN UINTN TokenNumber,
223 OUT EFI_PCD_INFO *PcdInfo
224 )
225 {
226 return DxeGetPcdInfo (Guid, TokenNumber, PcdInfo);
227 }
228
229 /**
230 Retrieve the currently set SKU Id.
231
232 @return The currently set SKU Id. If the platform has not set at a SKU Id, then the
233 default SKU Id value of 0 is returned. If the platform has set a SKU Id, then the currently set SKU
234 Id is returned.
235 **/
236 UINTN
237 EFIAPI
DxeGetPcdInfoGetSku(VOID)238 DxeGetPcdInfoGetSku (
239 VOID
240 )
241 {
242 return mPcdDatabase.DxeDb->SystemSkuId;
243 }
244
245 /**
246 Sets the SKU value for subsequent calls to set or get PCD token values.
247
248 SetSku() sets the SKU Id to be used for subsequent calls to set or get PCD values.
249 SetSku() is normally called only once by the system.
250
251 For each item (token), the database can hold a single value that applies to all SKUs,
252 or multiple values, where each value is associated with a specific SKU Id. Items with multiple,
253 SKU-specific values are called SKU enabled.
254
255 The SKU Id of zero is reserved as a default. The valid SkuId range is 1 to 255.
256 For tokens that are not SKU enabled, the system ignores any set SKU Id and works with the
257 single value for that token. For SKU-enabled tokens, the system will use the SKU Id set by the
258 last call to SetSku(). If no SKU Id is set or the currently set SKU Id isn't valid for the specified token,
259 the system uses the default SKU Id. If the system attempts to use the default SKU Id and no value has been
260 set for that Id, the results are unpredictable.
261
262 @param[in] SkuId The SKU value that will be used when the PCD service will retrieve and
263 set values associated with a PCD token.
264
265 **/
266 VOID
267 EFIAPI
DxePcdSetSku(IN UINTN SkuId)268 DxePcdSetSku (
269 IN UINTN SkuId
270 )
271 {
272 SKU_ID *SkuIdTable;
273 UINTN Index;
274
275 SkuIdTable = (SKU_ID *) ((UINT8 *) mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->SkuIdTableOffset);
276 for (Index = 0; Index < SkuIdTable[0]; Index++) {
277 if (SkuId == SkuIdTable[Index + 1]) {
278 mPcdDatabase.DxeDb->SystemSkuId = (SKU_ID) SkuId;
279 return;
280 }
281 }
282
283 //
284 // Invalid input SkuId, the default SKU Id will be used for the system.
285 //
286 DEBUG ((EFI_D_INFO, "PcdDxe - Invalid input SkuId, the default SKU Id will be used.\n"));
287 mPcdDatabase.DxeDb->SystemSkuId = (SKU_ID) 0;
288 return;
289 }
290
291 /**
292 Retrieves an 8-bit value for a given PCD token.
293
294 Retrieves the current byte-sized value for a PCD token number.
295 If the TokenNumber is invalid, the results are unpredictable.
296
297 @param[in] TokenNumber The PCD token number.
298
299 @return The UINT8 value.
300
301 **/
302 UINT8
303 EFIAPI
DxePcdGet8(IN UINTN TokenNumber)304 DxePcdGet8 (
305 IN UINTN TokenNumber
306 )
307 {
308 return *((UINT8 *) GetWorker (TokenNumber, sizeof (UINT8)));
309 }
310
311 /**
312 Retrieves an 16-bit value for a given PCD token.
313
314 Retrieves the current 16-bits value for a PCD token number.
315 If the TokenNumber is invalid, the results are unpredictable.
316
317 @param[in] TokenNumber The PCD token number.
318
319 @return The UINT16 value.
320
321 **/
322 UINT16
323 EFIAPI
DxePcdGet16(IN UINTN TokenNumber)324 DxePcdGet16 (
325 IN UINTN TokenNumber
326 )
327 {
328 return ReadUnaligned16 (GetWorker (TokenNumber, sizeof (UINT16)));
329 }
330
331 /**
332 Retrieves an 32-bit value for a given PCD token.
333
334 Retrieves the current 32-bits value for a PCD token number.
335 If the TokenNumber is invalid, the results are unpredictable.
336
337 @param[in] TokenNumber The PCD token number.
338
339 @return The UINT32 value.
340
341 **/
342 UINT32
343 EFIAPI
DxePcdGet32(IN UINTN TokenNumber)344 DxePcdGet32 (
345 IN UINTN TokenNumber
346 )
347 {
348 return ReadUnaligned32 (GetWorker (TokenNumber, sizeof (UINT32)));
349 }
350
351 /**
352 Retrieves an 64-bit value for a given PCD token.
353
354 Retrieves the current 64-bits value for a PCD token number.
355 If the TokenNumber is invalid, the results are unpredictable.
356
357 @param[in] TokenNumber The PCD token number.
358
359 @return The UINT64 value.
360
361 **/
362 UINT64
363 EFIAPI
DxePcdGet64(IN UINTN TokenNumber)364 DxePcdGet64 (
365 IN UINTN TokenNumber
366 )
367 {
368 return ReadUnaligned64(GetWorker (TokenNumber, sizeof (UINT64)));
369 }
370
371 /**
372 Retrieves a pointer to a value for a given PCD token.
373
374 Retrieves the current pointer to the buffer for a PCD token number.
375 Do not make any assumptions about the alignment of the pointer that
376 is returned by this function call. If the TokenNumber is invalid,
377 the results are unpredictable.
378
379 @param[in] TokenNumber The PCD token number.
380
381 @return The pointer to the buffer to be retrived.
382
383 **/
384 VOID *
385 EFIAPI
DxePcdGetPtr(IN UINTN TokenNumber)386 DxePcdGetPtr (
387 IN UINTN TokenNumber
388 )
389 {
390 return GetWorker (TokenNumber, 0);
391 }
392
393 /**
394 Retrieves a Boolean value for a given PCD token.
395
396 Retrieves the current boolean value for a PCD token number.
397 Do not make any assumptions about the alignment of the pointer that
398 is returned by this function call. If the TokenNumber is invalid,
399 the results are unpredictable.
400
401 @param[in] TokenNumber The PCD token number.
402
403 @return The Boolean value.
404
405 **/
406 BOOLEAN
407 EFIAPI
DxePcdGetBool(IN UINTN TokenNumber)408 DxePcdGetBool (
409 IN UINTN TokenNumber
410 )
411 {
412 return *((BOOLEAN *) GetWorker (TokenNumber, sizeof (BOOLEAN)));
413 }
414
415 /**
416 Retrieves the size of the value for a given PCD token.
417
418 Retrieves the current size of a particular PCD token.
419 If the TokenNumber is invalid, the results are unpredictable.
420
421 @param[in] TokenNumber The PCD token number.
422
423 @return The size of the value for the PCD token.
424
425 **/
426 UINTN
427 EFIAPI
DxePcdGetSize(IN UINTN TokenNumber)428 DxePcdGetSize (
429 IN UINTN TokenNumber
430 )
431 {
432 UINTN Size;
433 UINT32 *LocalTokenNumberTable;
434 BOOLEAN IsPeiDb;
435 UINTN MaxSize;
436 UINTN TmpTokenNumber;
437 //
438 // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.
439 // We have to decrement TokenNumber by 1 to make it usable
440 // as the array index.
441 //
442 TokenNumber--;
443
444 //
445 // Backup the TokenNumber passed in as GetPtrTypeSize need the original TokenNumber
446 //
447 TmpTokenNumber = TokenNumber;
448
449 // EBC compiler is very choosy. It may report warning about comparison
450 // between UINTN and 0 . So we add 1 in each size of the
451 // comparison.
452 ASSERT (TokenNumber + 1 < mPcdTotalTokenCount + 1);
453
454 // EBC compiler is very choosy. It may report warning about comparison
455 // between UINTN and 0 . So we add 1 in each size of the
456 // comparison.
457 IsPeiDb = (BOOLEAN) (TokenNumber + 1 < mPeiLocalTokenCount + 1);
458
459 TokenNumber = IsPeiDb ? TokenNumber :
460 (TokenNumber - mPeiLocalTokenCount);
461
462 LocalTokenNumberTable = IsPeiDb ? (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset)
463 : (UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset);
464
465 Size = (LocalTokenNumberTable[TokenNumber] & PCD_DATUM_TYPE_ALL_SET) >> PCD_DATUM_TYPE_SHIFT;
466
467 if (Size == 0) {
468 //
469 // For pointer type, we need to scan the SIZE_TABLE to get the current size.
470 //
471 return GetPtrTypeSize (TmpTokenNumber, &MaxSize);
472 } else {
473 return Size;
474 }
475
476 }
477
478 /**
479 Retrieves an 8-bit value for a given PCD token.
480
481 Retrieves the 8-bit value of a particular PCD token.
482 If the TokenNumber is invalid or the token space
483 specified by Guid does not exist, the results are
484 unpredictable.
485
486 @param[in] Guid The token space for the token number.
487 @param[in] ExTokenNumber The PCD token number.
488
489 @return The size 8-bit value for the PCD token.
490
491 **/
492 UINT8
493 EFIAPI
DxePcdGet8Ex(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber)494 DxePcdGet8Ex (
495 IN CONST EFI_GUID *Guid,
496 IN UINTN ExTokenNumber
497 )
498 {
499 return *((UINT8 *) ExGetWorker (Guid, ExTokenNumber, sizeof(UINT8)));
500 }
501
502 /**
503 Retrieves an 16-bit value for a given PCD token.
504
505 Retrieves the 16-bit value of a particular PCD token.
506 If the TokenNumber is invalid or the token space
507 specified by Guid does not exist, the results are
508 unpredictable.
509
510 @param[in] Guid The token space for the token number.
511 @param[in] ExTokenNumber The PCD token number.
512
513 @return The size 16-bit value for the PCD token.
514
515 **/
516 UINT16
517 EFIAPI
DxePcdGet16Ex(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber)518 DxePcdGet16Ex (
519 IN CONST EFI_GUID *Guid,
520 IN UINTN ExTokenNumber
521 )
522 {
523 return ReadUnaligned16 (ExGetWorker (Guid, ExTokenNumber, sizeof(UINT16)));
524 }
525
526 /**
527 Retrieves an 32-bit value for a given PCD token.
528
529 Retrieves the 32-bit value of a particular PCD token.
530 If the TokenNumber is invalid or the token space
531 specified by Guid does not exist, the results are
532 unpredictable.
533
534 @param[in] Guid The token space for the token number.
535 @param[in] ExTokenNumber The PCD token number.
536
537 @return The size 32-bit value for the PCD token.
538
539 **/
540 UINT32
541 EFIAPI
DxePcdGet32Ex(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber)542 DxePcdGet32Ex (
543 IN CONST EFI_GUID *Guid,
544 IN UINTN ExTokenNumber
545 )
546 {
547 return ReadUnaligned32 (ExGetWorker (Guid, ExTokenNumber, sizeof(UINT32)));
548 }
549
550 /**
551 Retrieves an 64-bit value for a given PCD token.
552
553 Retrieves the 64-bit value of a particular PCD token.
554 If the TokenNumber is invalid or the token space
555 specified by Guid does not exist, the results are
556 unpredictable.
557
558 @param[in] Guid The token space for the token number.
559 @param[in] ExTokenNumber The PCD token number.
560
561 @return The size 64-bit value for the PCD token.
562
563 **/
564 UINT64
565 EFIAPI
DxePcdGet64Ex(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber)566 DxePcdGet64Ex (
567 IN CONST EFI_GUID *Guid,
568 IN UINTN ExTokenNumber
569 )
570 {
571 return ReadUnaligned64 (ExGetWorker (Guid, ExTokenNumber, sizeof(UINT64)));
572 }
573
574 /**
575 Retrieves a pointer to a value for a given PCD token.
576
577 Retrieves the current pointer to the buffer for a PCD token number.
578 Do not make any assumptions about the alignment of the pointer that
579 is returned by this function call. If the TokenNumber is invalid,
580 the results are unpredictable.
581
582 @param[in] Guid The token space for the token number.
583 @param[in] ExTokenNumber The PCD token number.
584
585 @return The pointer to the buffer to be retrived.
586
587 **/
588 VOID *
589 EFIAPI
DxePcdGetPtrEx(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber)590 DxePcdGetPtrEx (
591 IN CONST EFI_GUID *Guid,
592 IN UINTN ExTokenNumber
593 )
594 {
595 return ExGetWorker (Guid, ExTokenNumber, 0);
596 }
597
598 /**
599 Retrieves an Boolean value for a given PCD token.
600
601 Retrieves the Boolean value of a particular PCD token.
602 If the TokenNumber is invalid or the token space
603 specified by Guid does not exist, the results are
604 unpredictable.
605
606 @param[in] Guid The token space for the token number.
607 @param[in] ExTokenNumber The PCD token number.
608
609 @return The size Boolean value for the PCD token.
610
611 **/
612 BOOLEAN
613 EFIAPI
DxePcdGetBoolEx(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber)614 DxePcdGetBoolEx (
615 IN CONST EFI_GUID *Guid,
616 IN UINTN ExTokenNumber
617 )
618 {
619 return *((BOOLEAN *) ExGetWorker (Guid, ExTokenNumber, sizeof(BOOLEAN)));
620 }
621
622 /**
623 Retrieves the size of the value for a given PCD token.
624
625 Retrieves the current size of a particular PCD token.
626 If the TokenNumber is invalid, the results are unpredictable.
627
628 @param[in] Guid The token space for the token number.
629 @param[in] ExTokenNumber The PCD token number.
630
631 @return The size of the value for the PCD token.
632
633 **/
634 UINTN
635 EFIAPI
DxePcdGetSizeEx(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber)636 DxePcdGetSizeEx (
637 IN CONST EFI_GUID *Guid,
638 IN UINTN ExTokenNumber
639 )
640 {
641 return DxePcdGetSize(GetExPcdTokenNumber (Guid, (UINT32) ExTokenNumber));
642 }
643
644 /**
645 Sets an 8-bit value for a given PCD token.
646
647 When the PCD service sets a value, it will check to ensure that the
648 size of the value being set is compatible with the Token's existing definition.
649 If it is not, an error will be returned.
650
651 @param[in] TokenNumber The PCD token number.
652 @param[in] Value The value to set for the PCD token.
653
654 @retval EFI_SUCCESS Procedure returned successfully.
655 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
656 being set was incompatible with a call to this function.
657 Use GetSize() to retrieve the size of the target data.
658 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
659
660 **/
661 EFI_STATUS
662 EFIAPI
DxePcdSet8(IN UINTN TokenNumber,IN UINT8 Value)663 DxePcdSet8 (
664 IN UINTN TokenNumber,
665 IN UINT8 Value
666 )
667 {
668 return SetValueWorker (TokenNumber, &Value, sizeof (Value));
669 }
670
671 /**
672 Sets an 16-bit value for a given PCD token.
673
674 When the PCD service sets a value, it will check to ensure that the
675 size of the value being set is compatible with the Token's existing definition.
676 If it is not, an error will be returned.
677
678 @param[in] TokenNumber The PCD token number.
679 @param[in] Value The value to set for the PCD token.
680
681 @retval EFI_SUCCESS Procedure returned successfully.
682 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
683 being set was incompatible with a call to this function.
684 Use GetSize() to retrieve the size of the target data.
685 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
686
687 **/
688 EFI_STATUS
689 EFIAPI
DxePcdSet16(IN UINTN TokenNumber,IN UINT16 Value)690 DxePcdSet16 (
691 IN UINTN TokenNumber,
692 IN UINT16 Value
693 )
694 {
695 return SetValueWorker (TokenNumber, &Value, sizeof (Value));
696 }
697
698 /**
699 Sets an 32-bit value for a given PCD token.
700
701 When the PCD service sets a value, it will check to ensure that the
702 size of the value being set is compatible with the Token's existing definition.
703 If it is not, an error will be returned.
704
705 @param[in] TokenNumber The PCD token number.
706 @param[in] Value The value to set for the PCD token.
707
708 @retval EFI_SUCCESS Procedure returned successfully.
709 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
710 being set was incompatible with a call to this function.
711 Use GetSize() to retrieve the size of the target data.
712 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
713
714 **/
715 EFI_STATUS
716 EFIAPI
DxePcdSet32(IN UINTN TokenNumber,IN UINT32 Value)717 DxePcdSet32 (
718 IN UINTN TokenNumber,
719 IN UINT32 Value
720 )
721 {
722 return SetValueWorker (TokenNumber, &Value, sizeof (Value));
723 }
724
725 /**
726 Sets an 64-bit value for a given PCD token.
727
728 When the PCD service sets a value, it will check to ensure that the
729 size of the value being set is compatible with the Token's existing definition.
730 If it is not, an error will be returned.
731
732 @param[in] TokenNumber The PCD token number.
733 @param[in] Value The value to set for the PCD token.
734
735 @retval EFI_SUCCESS Procedure returned successfully.
736 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
737 being set was incompatible with a call to this function.
738 Use GetSize() to retrieve the size of the target data.
739 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
740
741 **/
742 EFI_STATUS
743 EFIAPI
DxePcdSet64(IN UINTN TokenNumber,IN UINT64 Value)744 DxePcdSet64 (
745 IN UINTN TokenNumber,
746 IN UINT64 Value
747 )
748 {
749 return SetValueWorker (TokenNumber, &Value, sizeof (Value));
750 }
751
752 /**
753 Sets a value of a specified size for a given PCD token.
754
755 When the PCD service sets a value, it will check to ensure that the
756 size of the value being set is compatible with the Token's existing definition.
757 If it is not, an error will be returned.
758
759 @param[in] TokenNumber The PCD token number.
760 @param[in, out] SizeOfBuffer A pointer to the length of the value being set for the PCD token.
761 On input, if the SizeOfValue is greater than the maximum size supported
762 for this TokenNumber then the output value of SizeOfValue will reflect
763 the maximum size supported for this TokenNumber.
764 @param[in] Buffer The buffer to set for the PCD token.
765
766 @retval EFI_SUCCESS Procedure returned successfully.
767 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
768 being set was incompatible with a call to this function.
769 Use GetSize() to retrieve the size of the target data.
770 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
771
772 **/
773 EFI_STATUS
774 EFIAPI
DxePcdSetPtr(IN UINTN TokenNumber,IN OUT UINTN * SizeOfBuffer,IN VOID * Buffer)775 DxePcdSetPtr (
776 IN UINTN TokenNumber,
777 IN OUT UINTN *SizeOfBuffer,
778 IN VOID *Buffer
779 )
780 {
781 return SetWorker (TokenNumber, Buffer, SizeOfBuffer, TRUE);
782 }
783
784 /**
785 Sets an Boolean value for a given PCD token.
786
787 When the PCD service sets a value, it will check to ensure that the
788 size of the value being set is compatible with the Token's existing definition.
789 If it is not, an error will be returned.
790
791 @param[in] TokenNumber The PCD token number.
792 @param[in] Value The value to set for the PCD token.
793
794 @retval EFI_SUCCESS Procedure returned successfully.
795 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
796 being set was incompatible with a call to this function.
797 Use GetSize() to retrieve the size of the target data.
798 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
799
800 **/
801 EFI_STATUS
802 EFIAPI
DxePcdSetBool(IN UINTN TokenNumber,IN BOOLEAN Value)803 DxePcdSetBool (
804 IN UINTN TokenNumber,
805 IN BOOLEAN Value
806 )
807 {
808 return SetValueWorker (TokenNumber, &Value, sizeof (Value));
809 }
810
811 /**
812 Sets an 8-bit value for a given PCD token.
813
814 When the PCD service sets a value, it will check to ensure that the
815 size of the value being set is compatible with the Token's existing definition.
816 If it is not, an error will be returned.
817
818 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
819 @param[in] ExTokenNumber The PCD token number.
820 @param[in] Value The value to set for the PCD token.
821
822 @retval EFI_SUCCESS Procedure returned successfully.
823 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
824 being set was incompatible with a call to this function.
825 Use GetSize() to retrieve the size of the target data.
826 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
827
828 **/
829 EFI_STATUS
830 EFIAPI
DxePcdSet8Ex(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber,IN UINT8 Value)831 DxePcdSet8Ex (
832 IN CONST EFI_GUID *Guid,
833 IN UINTN ExTokenNumber,
834 IN UINT8 Value
835 )
836 {
837 return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
838 }
839
840 /**
841 Sets an 16-bit value for a given PCD token.
842
843 When the PCD service sets a value, it will check to ensure that the
844 size of the value being set is compatible with the Token's existing definition.
845 If it is not, an error will be returned.
846
847 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
848 @param[in] ExTokenNumber The PCD token number.
849 @param[in] Value The value to set for the PCD token.
850
851 @retval EFI_SUCCESS Procedure returned successfully.
852 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
853 being set was incompatible with a call to this function.
854 Use GetSize() to retrieve the size of the target data.
855 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
856
857 **/
858 EFI_STATUS
859 EFIAPI
DxePcdSet16Ex(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber,IN UINT16 Value)860 DxePcdSet16Ex (
861 IN CONST EFI_GUID *Guid,
862 IN UINTN ExTokenNumber,
863 IN UINT16 Value
864 )
865 {
866 return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
867 }
868
869 /**
870 Sets an 32-bit value for a given PCD token.
871
872 When the PCD service sets a value, it will check to ensure that the
873 size of the value being set is compatible with the Token's existing definition.
874 If it is not, an error will be returned.
875
876 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
877 @param[in] ExTokenNumber The PCD token number.
878 @param[in] Value The value to set for the PCD token.
879
880 @retval EFI_SUCCESS Procedure returned successfully.
881 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
882 being set was incompatible with a call to this function.
883 Use GetSize() to retrieve the size of the target data.
884 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
885
886 **/
887 EFI_STATUS
888 EFIAPI
DxePcdSet32Ex(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber,IN UINT32 Value)889 DxePcdSet32Ex (
890 IN CONST EFI_GUID *Guid,
891 IN UINTN ExTokenNumber,
892 IN UINT32 Value
893 )
894 {
895 return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
896 }
897
898 /**
899 Sets an 64-bit value for a given PCD token.
900
901 When the PCD service sets a value, it will check to ensure that the
902 size of the value being set is compatible with the Token's existing definition.
903 If it is not, an error will be returned.
904
905 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
906 @param[in] ExTokenNumber The PCD token number.
907 @param[in] Value The value to set for the PCD token.
908
909 @retval EFI_SUCCESS Procedure returned successfully.
910 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
911 being set was incompatible with a call to this function.
912 Use GetSize() to retrieve the size of the target data.
913 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
914
915 **/
916 EFI_STATUS
917 EFIAPI
DxePcdSet64Ex(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber,IN UINT64 Value)918 DxePcdSet64Ex (
919 IN CONST EFI_GUID *Guid,
920 IN UINTN ExTokenNumber,
921 IN UINT64 Value
922 )
923 {
924 return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
925 }
926
927 /**
928 Sets a value of a specified size for a given PCD token.
929
930 When the PCD service sets a value, it will check to ensure that the
931 size of the value being set is compatible with the Token's existing definition.
932 If it is not, an error will be returned.
933
934 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
935 @param[in] ExTokenNumber The PCD token number.
936 @param[in, out] SizeOfBuffer A pointer to the length of the value being set for the PCD token.
937 On input, if the SizeOfValue is greater than the maximum size supported
938 for this TokenNumber then the output value of SizeOfValue will reflect
939 the maximum size supported for this TokenNumber.
940 @param[in] Buffer The buffer to set for the PCD token.
941
942 @retval EFI_SUCCESS Procedure returned successfully.
943 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
944 being set was incompatible with a call to this function.
945 Use GetSize() to retrieve the size of the target data.
946 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
947
948 **/
949 EFI_STATUS
950 EFIAPI
DxePcdSetPtrEx(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber,IN OUT UINTN * SizeOfBuffer,IN VOID * Buffer)951 DxePcdSetPtrEx (
952 IN CONST EFI_GUID *Guid,
953 IN UINTN ExTokenNumber,
954 IN OUT UINTN *SizeOfBuffer,
955 IN VOID *Buffer
956 )
957 {
958 return ExSetWorker(ExTokenNumber, Guid, Buffer, SizeOfBuffer, TRUE);
959 }
960
961 /**
962 Sets an Boolean value for a given PCD token.
963
964 When the PCD service sets a value, it will check to ensure that the
965 size of the value being set is compatible with the Token's existing definition.
966 If it is not, an error will be returned.
967
968 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
969 @param[in] ExTokenNumber The PCD token number.
970 @param[in] Value The value to set for the PCD token.
971
972 @retval EFI_SUCCESS Procedure returned successfully.
973 @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
974 being set was incompatible with a call to this function.
975 Use GetSize() to retrieve the size of the target data.
976 @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
977
978 **/
979 EFI_STATUS
980 EFIAPI
DxePcdSetBoolEx(IN CONST EFI_GUID * Guid,IN UINTN ExTokenNumber,IN BOOLEAN Value)981 DxePcdSetBoolEx (
982 IN CONST EFI_GUID *Guid,
983 IN UINTN ExTokenNumber,
984 IN BOOLEAN Value
985 )
986 {
987 return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
988 }
989
990 /**
991 Specifies a function to be called anytime the value of a designated token is changed.
992
993 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
994 @param[in] TokenNumber The PCD token number.
995 @param[in] CallBackFunction The function prototype called when the value associated with the CallBackToken is set.
996
997 @retval EFI_SUCCESS The PCD service has successfully established a call event
998 for the CallBackToken requested.
999 @retval EFI_NOT_FOUND The PCD service could not find the referenced token number.
1000
1001 **/
1002 EFI_STATUS
1003 EFIAPI
DxeRegisterCallBackOnSet(IN CONST EFI_GUID * Guid,OPTIONAL IN UINTN TokenNumber,IN PCD_PROTOCOL_CALLBACK CallBackFunction)1004 DxeRegisterCallBackOnSet (
1005 IN CONST EFI_GUID *Guid, OPTIONAL
1006 IN UINTN TokenNumber,
1007 IN PCD_PROTOCOL_CALLBACK CallBackFunction
1008 )
1009 {
1010 EFI_STATUS Status;
1011
1012 if (CallBackFunction == NULL) {
1013 return EFI_INVALID_PARAMETER;
1014 }
1015 //
1016 // Aquire lock to prevent reentrance from TPL_CALLBACK level
1017 //
1018 EfiAcquireLock (&mPcdDatabaseLock);
1019
1020 Status = DxeRegisterCallBackWorker (TokenNumber, Guid, CallBackFunction);
1021
1022 EfiReleaseLock (&mPcdDatabaseLock);
1023
1024 return Status;
1025 }
1026
1027 /**
1028 Cancels a previously set callback function for a particular PCD token number.
1029
1030 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
1031 @param[in] TokenNumber The PCD token number.
1032 @param[in] CallBackFunction The function prototype called when the value associated with the CallBackToken is set.
1033
1034 @retval EFI_SUCCESS The PCD service has successfully established a call event
1035 for the CallBackToken requested.
1036 @retval EFI_NOT_FOUND The PCD service could not find the referenced token number.
1037
1038 **/
1039 EFI_STATUS
1040 EFIAPI
DxeUnRegisterCallBackOnSet(IN CONST EFI_GUID * Guid,OPTIONAL IN UINTN TokenNumber,IN PCD_PROTOCOL_CALLBACK CallBackFunction)1041 DxeUnRegisterCallBackOnSet (
1042 IN CONST EFI_GUID *Guid, OPTIONAL
1043 IN UINTN TokenNumber,
1044 IN PCD_PROTOCOL_CALLBACK CallBackFunction
1045 )
1046 {
1047 EFI_STATUS Status;
1048
1049 if (CallBackFunction == NULL) {
1050 return EFI_INVALID_PARAMETER;
1051 }
1052
1053 //
1054 // Aquire lock to prevent reentrance from TPL_CALLBACK level
1055 //
1056 EfiAcquireLock (&mPcdDatabaseLock);
1057
1058 Status = DxeUnRegisterCallBackWorker (TokenNumber, Guid, CallBackFunction);
1059
1060 EfiReleaseLock (&mPcdDatabaseLock);
1061
1062 return Status;
1063 }
1064
1065 /**
1066 Retrieves the next valid token number in a given namespace.
1067
1068 This is useful since the PCD infrastructure contains a sparse list of token numbers,
1069 and one cannot a priori know what token numbers are valid in the database.
1070
1071 If TokenNumber is 0 and Guid is not NULL, then the first token from the token space specified by Guid is returned.
1072 If TokenNumber is not 0 and Guid is not NULL, then the next token in the token space specified by Guid is returned.
1073 If TokenNumber is 0 and Guid is NULL, then the first token in the default token space is returned.
1074 If TokenNumber is not 0 and Guid is NULL, then the next token in the default token space is returned.
1075 The token numbers in the default token space may not be related to token numbers in token spaces that are named by Guid.
1076 If the next token number can be retrieved, then it is returned in TokenNumber, and EFI_SUCCESS is returned.
1077 If TokenNumber represents the last token number in the token space specified by Guid, then EFI_NOT_FOUND is returned.
1078 If TokenNumber is not present in the token space specified by Guid, then EFI_NOT_FOUND is returned.
1079
1080
1081 @param[in] Guid The 128-bit unique value that designates the namespace from which to retrieve the next token.
1082 This is an optional parameter that may be NULL. If this parameter is NULL, then a request is
1083 being made to retrieve tokens from the default token space.
1084 @param[in, out] TokenNumber
1085 A pointer to the PCD token number to use to find the subsequent token number.
1086
1087 @retval EFI_SUCCESS The PCD service has retrieved the next valid token number.
1088 @retval EFI_NOT_FOUND The PCD service could not find data from the requested token number.
1089
1090 **/
1091 EFI_STATUS
1092 EFIAPI
DxePcdGetNextToken(IN CONST EFI_GUID * Guid,OPTIONAL IN OUT UINTN * TokenNumber)1093 DxePcdGetNextToken (
1094 IN CONST EFI_GUID *Guid, OPTIONAL
1095 IN OUT UINTN *TokenNumber
1096 )
1097 {
1098 EFI_STATUS Status;
1099 BOOLEAN PeiExMapTableEmpty;
1100 BOOLEAN DxeExMapTableEmpty;
1101
1102 Status = EFI_NOT_FOUND;
1103 PeiExMapTableEmpty = mPeiExMapTableEmpty;
1104 DxeExMapTableEmpty = mDxeExMapTableEmpty;
1105
1106 //
1107 // Scan the local token space
1108 //
1109 if (Guid == NULL) {
1110 // EBC compiler is very choosy. It may report warning about comparison
1111 // between UINTN and 0 . So we add 1 in each size of the
1112 // comparison.
1113 if (((*TokenNumber + 1 > mPeiNexTokenCount + 1) && (*TokenNumber + 1 <= mPeiLocalTokenCount + 1)) ||
1114 ((*TokenNumber + 1 > (mPeiLocalTokenCount + mDxeNexTokenCount + 1)))) {
1115 return EFI_NOT_FOUND;
1116 }
1117
1118 (*TokenNumber)++;
1119 if ((*TokenNumber + 1 > mPeiNexTokenCount + 1) &&
1120 (*TokenNumber + 1 <= mPeiLocalTokenCount + 1)) {
1121 //
1122 // The first Non-Ex type Token Number for DXE PCD
1123 // database is mPeiLocalTokenCount + 1
1124 //
1125 if (mDxeNexTokenCount > 0) {
1126 *TokenNumber = mPeiLocalTokenCount + 1;
1127 } else {
1128 *TokenNumber = PCD_INVALID_TOKEN_NUMBER;
1129 return EFI_NOT_FOUND;
1130 }
1131 } else if (*TokenNumber + 1 > mDxeNexTokenCount + mPeiLocalTokenCount + 1) {
1132 *TokenNumber = PCD_INVALID_TOKEN_NUMBER;
1133 return EFI_NOT_FOUND;
1134 }
1135 return EFI_SUCCESS;
1136 }
1137
1138 if (PeiExMapTableEmpty && DxeExMapTableEmpty) {
1139 return EFI_NOT_FOUND;
1140 }
1141
1142 if (!PeiExMapTableEmpty) {
1143 Status = ExGetNextTokeNumber (
1144 Guid,
1145 TokenNumber,
1146 (EFI_GUID *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->GuidTableOffset),
1147 mPeiGuidTableSize,
1148 (DYNAMICEX_MAPPING *)((UINT8 *) mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->ExMapTableOffset),
1149 mPeiExMapppingTableSize
1150 );
1151 }
1152
1153 if (Status == EFI_SUCCESS) {
1154 return Status;
1155 }
1156
1157 if (!DxeExMapTableEmpty) {
1158 Status = ExGetNextTokeNumber (
1159 Guid,
1160 TokenNumber,
1161 (EFI_GUID *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->GuidTableOffset),
1162 mDxeGuidTableSize,
1163 (DYNAMICEX_MAPPING *)((UINT8 *) mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->ExMapTableOffset),
1164 mDxeExMapppingTableSize
1165 );
1166 }
1167
1168 return Status;
1169 }
1170
1171 /**
1172 Get all token space guid table which is different with given token space guid.
1173
1174 @param ExMapTableSize The size of ExMapTable in item
1175 @param ExMapTable Token space guid table that want to be scaned.
1176 @param GuidTable Guid table
1177
1178 @return all token space guid table which is different with given token space guid.
1179
1180 **/
1181 EFI_GUID **
GetDistinctTokenSpace(IN OUT UINTN * ExMapTableSize,IN DYNAMICEX_MAPPING * ExMapTable,IN EFI_GUID * GuidTable)1182 GetDistinctTokenSpace (
1183 IN OUT UINTN *ExMapTableSize,
1184 IN DYNAMICEX_MAPPING *ExMapTable,
1185 IN EFI_GUID *GuidTable
1186 )
1187 {
1188 EFI_GUID **DistinctTokenSpace;
1189 UINTN OldGuidIndex;
1190 UINTN TsIdx;
1191 UINTN TempTsIdx;
1192 UINTN Idx;
1193 BOOLEAN Match;
1194
1195 DistinctTokenSpace = AllocateZeroPool (*ExMapTableSize * sizeof (EFI_GUID *));
1196 ASSERT (DistinctTokenSpace != NULL);
1197
1198 TsIdx = 0;
1199 OldGuidIndex = ExMapTable[0].ExGuidIndex;
1200 DistinctTokenSpace[TsIdx] = &GuidTable[OldGuidIndex];
1201 for (Idx = 1; Idx < *ExMapTableSize; Idx++) {
1202 Match = FALSE;
1203 OldGuidIndex = ExMapTable[Idx].ExGuidIndex;
1204 for (TempTsIdx = 0; TempTsIdx <= TsIdx; TempTsIdx++) {
1205 if (&GuidTable[OldGuidIndex] == DistinctTokenSpace[TempTsIdx]) {
1206 //
1207 // Have recorded this GUID.
1208 //
1209 Match = TRUE;
1210 break;
1211 }
1212 }
1213 if (!Match) {
1214 DistinctTokenSpace[++TsIdx] = &GuidTable[OldGuidIndex];
1215 }
1216 }
1217
1218 //
1219 // The total number of Distinct Token Space
1220 // is TsIdx + 1 because we use TsIdx as a index
1221 // to the DistinctTokenSpace[]
1222 //
1223 *ExMapTableSize = TsIdx + 1;
1224 return DistinctTokenSpace;
1225
1226 }
1227
1228 /**
1229 Retrieves the next valid PCD token namespace for a given namespace.
1230
1231 Gets the next valid token namespace for a given namespace. This is useful to traverse the valid
1232 token namespaces on a platform.
1233
1234 @param[in, out] Guid An indirect pointer to EFI_GUID. On input it designates a known token
1235 namespace from which the search will start. On output, it designates the next valid
1236 token namespace on the platform. If *Guid is NULL, then the GUID of the first token
1237 space of the current platform is returned. If the search cannot locate the next valid
1238 token namespace, an error is returned and the value of *Guid is undefined.
1239
1240 @retval EFI_SUCCESS The PCD service retrieved the value requested.
1241 @retval EFI_NOT_FOUND The PCD service could not find the next valid token namespace.
1242
1243 **/
1244 EFI_STATUS
1245 EFIAPI
DxePcdGetNextTokenSpace(IN OUT CONST EFI_GUID ** Guid)1246 DxePcdGetNextTokenSpace (
1247 IN OUT CONST EFI_GUID **Guid
1248 )
1249 {
1250 UINTN Idx;
1251 UINTN Idx2;
1252 UINTN Idx3;
1253 UINTN PeiTokenSpaceTableSize;
1254 UINTN DxeTokenSpaceTableSize;
1255 EFI_GUID **PeiTokenSpaceTable;
1256 EFI_GUID **DxeTokenSpaceTable;
1257 BOOLEAN Match;
1258 BOOLEAN PeiExMapTableEmpty;
1259 BOOLEAN DxeExMapTableEmpty;
1260
1261 ASSERT (Guid != NULL);
1262
1263 PeiExMapTableEmpty = mPeiExMapTableEmpty;
1264 DxeExMapTableEmpty = mDxeExMapTableEmpty;
1265
1266 if (PeiExMapTableEmpty && DxeExMapTableEmpty) {
1267 return EFI_NOT_FOUND;
1268 }
1269
1270 if (TmpTokenSpaceBuffer[0] == NULL) {
1271 PeiTokenSpaceTableSize = 0;
1272
1273 if (!PeiExMapTableEmpty) {
1274 PeiTokenSpaceTableSize = mPeiExMapppingTableSize / sizeof(DYNAMICEX_MAPPING);
1275 PeiTokenSpaceTable = GetDistinctTokenSpace (&PeiTokenSpaceTableSize,
1276 (DYNAMICEX_MAPPING *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->ExMapTableOffset),
1277 (EFI_GUID *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->GuidTableOffset)
1278 );
1279 CopyMem (TmpTokenSpaceBuffer, PeiTokenSpaceTable, sizeof (EFI_GUID*) * PeiTokenSpaceTableSize);
1280 FreePool (PeiTokenSpaceTable);
1281 }
1282
1283 if (!DxeExMapTableEmpty) {
1284 DxeTokenSpaceTableSize = mDxeExMapppingTableSize / sizeof(DYNAMICEX_MAPPING);
1285 DxeTokenSpaceTable = GetDistinctTokenSpace (&DxeTokenSpaceTableSize,
1286 (DYNAMICEX_MAPPING *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->ExMapTableOffset),
1287 (EFI_GUID *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->GuidTableOffset)
1288 );
1289
1290 //
1291 // Make sure EFI_GUID in DxeTokenSpaceTable does not exist in PeiTokenSpaceTable
1292 //
1293 for (Idx2 = 0, Idx3 = PeiTokenSpaceTableSize; Idx2 < DxeTokenSpaceTableSize; Idx2++) {
1294 Match = FALSE;
1295 for (Idx = 0; Idx < PeiTokenSpaceTableSize; Idx++) {
1296 if (CompareGuid (TmpTokenSpaceBuffer[Idx], DxeTokenSpaceTable[Idx2])) {
1297 Match = TRUE;
1298 break;
1299 }
1300 }
1301 if (!Match) {
1302 TmpTokenSpaceBuffer[Idx3++] = DxeTokenSpaceTable[Idx2];
1303 }
1304 }
1305
1306 TmpTokenSpaceBufferCount = Idx3;
1307 FreePool (DxeTokenSpaceTable);
1308 }
1309 }
1310
1311 if (*Guid == NULL) {
1312 *Guid = TmpTokenSpaceBuffer[0];
1313 return EFI_SUCCESS;
1314 }
1315
1316 for (Idx = 0; Idx < TmpTokenSpaceBufferCount; Idx++) {
1317 if (CompareGuid (*Guid, TmpTokenSpaceBuffer[Idx])) {
1318 if (Idx == TmpTokenSpaceBufferCount - 1) {
1319 //
1320 // It has been the last token namespace.
1321 //
1322 *Guid = NULL;
1323 return EFI_NOT_FOUND;
1324 } else {
1325 Idx++;
1326 *Guid = TmpTokenSpaceBuffer[Idx];
1327 return EFI_SUCCESS;
1328 }
1329 }
1330 }
1331
1332 return EFI_NOT_FOUND;
1333 }
1334
1335
1336