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Fix memory leak issues.
[mirror_edk2.git] / IntelFrameworkModulePkg / Library / GenericBdsLib / BdsMisc.c
1 /** @file
2 Misc BDS library function
3
4 Copyright (c) 2004 - 2012, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15 #include "InternalBdsLib.h"
16
17
18 #define MAX_STRING_LEN 200
19
20 BOOLEAN mFeaturerSwitch = TRUE;
21 BOOLEAN mResetRequired = FALSE;
22
23 extern UINT16 gPlatformBootTimeOutDefault;
24
25 /**
26 The function will go through the driver option link list, load and start
27 every driver the driver option device path point to.
28
29 @param BdsDriverLists The header of the current driver option link list
30
31 **/
32 VOID
33 EFIAPI
34 BdsLibLoadDrivers (
35 IN LIST_ENTRY *BdsDriverLists
36 )
37 {
38 EFI_STATUS Status;
39 LIST_ENTRY *Link;
40 BDS_COMMON_OPTION *Option;
41 EFI_HANDLE ImageHandle;
42 EFI_LOADED_IMAGE_PROTOCOL *ImageInfo;
43 UINTN ExitDataSize;
44 CHAR16 *ExitData;
45 BOOLEAN ReconnectAll;
46
47 ReconnectAll = FALSE;
48
49 //
50 // Process the driver option
51 //
52 for (Link = BdsDriverLists->ForwardLink; Link != BdsDriverLists; Link = Link->ForwardLink) {
53 Option = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);
54
55 //
56 // If a load option is not marked as LOAD_OPTION_ACTIVE,
57 // the boot manager will not automatically load the option.
58 //
59 if (!IS_LOAD_OPTION_TYPE (Option->Attribute, LOAD_OPTION_ACTIVE)) {
60 continue;
61 }
62
63 //
64 // If a driver load option is marked as LOAD_OPTION_FORCE_RECONNECT,
65 // then all of the EFI drivers in the system will be disconnected and
66 // reconnected after the last driver load option is processed.
67 //
68 if (IS_LOAD_OPTION_TYPE (Option->Attribute, LOAD_OPTION_FORCE_RECONNECT)) {
69 ReconnectAll = TRUE;
70 }
71
72 //
73 // Make sure the driver path is connected.
74 //
75 BdsLibConnectDevicePath (Option->DevicePath);
76
77 //
78 // Load and start the image that Driver#### describes
79 //
80 Status = gBS->LoadImage (
81 FALSE,
82 gImageHandle,
83 Option->DevicePath,
84 NULL,
85 0,
86 &ImageHandle
87 );
88
89 if (!EFI_ERROR (Status)) {
90 gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &ImageInfo);
91
92 //
93 // Verify whether this image is a driver, if not,
94 // exit it and continue to parse next load option
95 //
96 if (ImageInfo->ImageCodeType != EfiBootServicesCode && ImageInfo->ImageCodeType != EfiRuntimeServicesCode) {
97 gBS->Exit (ImageHandle, EFI_INVALID_PARAMETER, 0, NULL);
98 continue;
99 }
100
101 if (Option->LoadOptionsSize != 0) {
102 ImageInfo->LoadOptionsSize = Option->LoadOptionsSize;
103 ImageInfo->LoadOptions = Option->LoadOptions;
104 }
105 //
106 // Before calling the image, enable the Watchdog Timer for
107 // the 5 Minute period
108 //
109 gBS->SetWatchdogTimer (5 * 60, 0x0000, 0x00, NULL);
110
111 Status = gBS->StartImage (ImageHandle, &ExitDataSize, &ExitData);
112 DEBUG ((DEBUG_INFO | DEBUG_LOAD, "Driver Return Status = %r\n", Status));
113
114 //
115 // Clear the Watchdog Timer after the image returns
116 //
117 gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);
118 }
119 }
120
121 //
122 // Process the LOAD_OPTION_FORCE_RECONNECT driver option
123 //
124 if (ReconnectAll) {
125 BdsLibDisconnectAllEfi ();
126 BdsLibConnectAll ();
127 }
128
129 }
130
131 /**
132 Get the Option Number that does not used.
133 Try to locate the specific option variable one by one utile find a free number.
134
135 @param VariableName Indicate if the boot#### or driver#### option
136
137 @return The Minimal Free Option Number
138
139 **/
140 UINT16
141 BdsLibGetFreeOptionNumber (
142 IN CHAR16 *VariableName
143 )
144 {
145 UINTN Index;
146 CHAR16 StrTemp[10];
147 UINT16 *OptionBuffer;
148 UINTN OptionSize;
149
150 //
151 // Try to find the minimum free number from 0, 1, 2, 3....
152 //
153 Index = 0;
154 do {
155 if (*VariableName == 'B') {
156 UnicodeSPrint (StrTemp, sizeof (StrTemp), L"Boot%04x", Index);
157 } else {
158 UnicodeSPrint (StrTemp, sizeof (StrTemp), L"Driver%04x", Index);
159 }
160 //
161 // try if the option number is used
162 //
163 OptionBuffer = BdsLibGetVariableAndSize (
164 StrTemp,
165 &gEfiGlobalVariableGuid,
166 &OptionSize
167 );
168 if (OptionBuffer == NULL) {
169 break;
170 }
171 Index++;
172 } while (TRUE);
173
174 return ((UINT16) Index);
175 }
176
177
178 /**
179 This function will register the new boot#### or driver#### option base on
180 the VariableName. The new registered boot#### or driver#### will be linked
181 to BdsOptionList and also update to the VariableName. After the boot#### or
182 driver#### updated, the BootOrder or DriverOrder will also be updated.
183
184 @param BdsOptionList The header of the boot#### or driver#### link list
185 @param DevicePath The device path which the boot#### or driver####
186 option present
187 @param String The description of the boot#### or driver####
188 @param VariableName Indicate if the boot#### or driver#### option
189
190 @retval EFI_SUCCESS The boot#### or driver#### have been success
191 registered
192 @retval EFI_STATUS Return the status of gRT->SetVariable ().
193
194 **/
195 EFI_STATUS
196 EFIAPI
197 BdsLibRegisterNewOption (
198 IN LIST_ENTRY *BdsOptionList,
199 IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
200 IN CHAR16 *String,
201 IN CHAR16 *VariableName
202 )
203 {
204 EFI_STATUS Status;
205 UINTN Index;
206 UINT16 RegisterOptionNumber;
207 UINT16 *TempOptionPtr;
208 UINTN TempOptionSize;
209 UINT16 *OptionOrderPtr;
210 VOID *OptionPtr;
211 UINTN OptionSize;
212 UINT8 *TempPtr;
213 EFI_DEVICE_PATH_PROTOCOL *OptionDevicePath;
214 CHAR16 *Description;
215 CHAR16 OptionName[10];
216 BOOLEAN UpdateDescription;
217 UINT16 BootOrderEntry;
218 UINTN OrderItemNum;
219
220
221 OptionPtr = NULL;
222 OptionSize = 0;
223 TempPtr = NULL;
224 OptionDevicePath = NULL;
225 Description = NULL;
226 OptionOrderPtr = NULL;
227 UpdateDescription = FALSE;
228 Status = EFI_SUCCESS;
229 ZeroMem (OptionName, sizeof (OptionName));
230
231 TempOptionSize = 0;
232 TempOptionPtr = BdsLibGetVariableAndSize (
233 VariableName,
234 &gEfiGlobalVariableGuid,
235 &TempOptionSize
236 );
237 //
238 // Compare with current option variable if the previous option is set in global variable.
239 //
240 for (Index = 0; Index < TempOptionSize / sizeof (UINT16); Index++) {
241 //
242 // TempOptionPtr must not be NULL if we have non-zero TempOptionSize.
243 //
244 ASSERT (TempOptionPtr != NULL);
245
246 if (*VariableName == 'B') {
247 UnicodeSPrint (OptionName, sizeof (OptionName), L"Boot%04x", TempOptionPtr[Index]);
248 } else {
249 UnicodeSPrint (OptionName, sizeof (OptionName), L"Driver%04x", TempOptionPtr[Index]);
250 }
251
252 OptionPtr = BdsLibGetVariableAndSize (
253 OptionName,
254 &gEfiGlobalVariableGuid,
255 &OptionSize
256 );
257 if (OptionPtr == NULL) {
258 continue;
259 }
260
261 //
262 // Validate the variable.
263 //
264 if (!ValidateOption(OptionPtr, OptionSize)) {
265 continue;
266 }
267
268 TempPtr = OptionPtr;
269 TempPtr += sizeof (UINT32) + sizeof (UINT16);
270 Description = (CHAR16 *) TempPtr;
271 TempPtr += StrSize ((CHAR16 *) TempPtr);
272 OptionDevicePath = (EFI_DEVICE_PATH_PROTOCOL *) TempPtr;
273
274 //
275 // Notes: the description may will change base on the GetStringToken
276 //
277 if (CompareMem (OptionDevicePath, DevicePath, GetDevicePathSize (OptionDevicePath)) == 0) {
278 if (CompareMem (Description, String, StrSize (Description)) == 0) {
279 //
280 // Got the option, so just return
281 //
282 FreePool (OptionPtr);
283 FreePool (TempOptionPtr);
284 return EFI_SUCCESS;
285 } else {
286 //
287 // Option description changed, need update.
288 //
289 UpdateDescription = TRUE;
290 FreePool (OptionPtr);
291 break;
292 }
293 }
294
295 FreePool (OptionPtr);
296 }
297
298 OptionSize = sizeof (UINT32) + sizeof (UINT16) + StrSize (String);
299 OptionSize += GetDevicePathSize (DevicePath);
300 OptionPtr = AllocateZeroPool (OptionSize);
301 ASSERT (OptionPtr != NULL);
302
303 TempPtr = OptionPtr;
304 *(UINT32 *) TempPtr = LOAD_OPTION_ACTIVE;
305 TempPtr += sizeof (UINT32);
306 *(UINT16 *) TempPtr = (UINT16) GetDevicePathSize (DevicePath);
307 TempPtr += sizeof (UINT16);
308 CopyMem (TempPtr, String, StrSize (String));
309 TempPtr += StrSize (String);
310 CopyMem (TempPtr, DevicePath, GetDevicePathSize (DevicePath));
311
312 if (UpdateDescription) {
313 //
314 // The number in option#### to be updated.
315 // In this case, we must have non-NULL TempOptionPtr.
316 //
317 ASSERT (TempOptionPtr != NULL);
318 RegisterOptionNumber = TempOptionPtr[Index];
319 } else {
320 //
321 // The new option#### number
322 //
323 RegisterOptionNumber = BdsLibGetFreeOptionNumber(VariableName);
324 }
325
326 if (*VariableName == 'B') {
327 UnicodeSPrint (OptionName, sizeof (OptionName), L"Boot%04x", RegisterOptionNumber);
328 } else {
329 UnicodeSPrint (OptionName, sizeof (OptionName), L"Driver%04x", RegisterOptionNumber);
330 }
331
332 Status = gRT->SetVariable (
333 OptionName,
334 &gEfiGlobalVariableGuid,
335 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
336 OptionSize,
337 OptionPtr
338 );
339 //
340 // Return if only need to update a changed description or fail to set option.
341 //
342 if (EFI_ERROR (Status) || UpdateDescription) {
343 FreePool (OptionPtr);
344 if (TempOptionPtr != NULL) {
345 FreePool (TempOptionPtr);
346 }
347 return Status;
348 }
349
350 FreePool (OptionPtr);
351
352 //
353 // Update the option order variable
354 //
355
356 //
357 // If no option order
358 //
359 if (TempOptionSize == 0) {
360 BootOrderEntry = 0;
361 Status = gRT->SetVariable (
362 VariableName,
363 &gEfiGlobalVariableGuid,
364 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
365 sizeof (UINT16),
366 &BootOrderEntry
367 );
368 if (TempOptionPtr != NULL) {
369 FreePool (TempOptionPtr);
370 }
371 return Status;
372 }
373
374 //
375 // TempOptionPtr must not be NULL if TempOptionSize is not zero.
376 //
377 ASSERT (TempOptionPtr != NULL);
378 //
379 // Append the new option number to the original option order
380 //
381 OrderItemNum = (TempOptionSize / sizeof (UINT16)) + 1 ;
382 OptionOrderPtr = AllocateZeroPool ( OrderItemNum * sizeof (UINT16));
383 ASSERT (OptionOrderPtr!= NULL);
384 CopyMem (OptionOrderPtr, TempOptionPtr, (OrderItemNum - 1) * sizeof (UINT16));
385
386 OptionOrderPtr[Index] = RegisterOptionNumber;
387
388 Status = gRT->SetVariable (
389 VariableName,
390 &gEfiGlobalVariableGuid,
391 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
392 OrderItemNum * sizeof (UINT16),
393 OptionOrderPtr
394 );
395 FreePool (TempOptionPtr);
396 FreePool (OptionOrderPtr);
397
398 return Status;
399 }
400
401 /**
402 Returns the size of a device path in bytes.
403
404 This function returns the size, in bytes, of the device path data structure
405 specified by DevicePath including the end of device path node. If DevicePath
406 is NULL, then 0 is returned. If the length of the device path is bigger than
407 MaxSize, also return 0 to indicate this is an invalidate device path.
408
409 @param DevicePath A pointer to a device path data structure.
410 @param MaxSize Max valid device path size. If big than this size,
411 return error.
412
413 @retval 0 An invalid device path.
414 @retval Others The size of a device path in bytes.
415
416 **/
417 UINTN
418 GetDevicePathSizeEx (
419 IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
420 IN UINTN MaxSize
421 )
422 {
423 UINTN Size;
424 UINTN NodeSize;
425
426 if (DevicePath == NULL) {
427 return 0;
428 }
429
430 //
431 // Search for the end of the device path structure
432 //
433 Size = 0;
434 while (!IsDevicePathEnd (DevicePath)) {
435 NodeSize = DevicePathNodeLength (DevicePath);
436 if (NodeSize < END_DEVICE_PATH_LENGTH) {
437 return 0;
438 }
439 Size += NodeSize;
440 if (Size > MaxSize) {
441 return 0;
442 }
443 DevicePath = NextDevicePathNode (DevicePath);
444 }
445 Size += DevicePathNodeLength (DevicePath);
446 if (Size > MaxSize) {
447 return 0;
448 }
449
450 return Size;
451 }
452
453 /**
454 Returns the length of a Null-terminated Unicode string. If the length is
455 bigger than MaxStringLen, return length 0 to indicate that this is an
456 invalidate string.
457
458 This function returns the number of Unicode characters in the Null-terminated
459 Unicode string specified by String.
460
461 If String is NULL, then ASSERT().
462 If String is not aligned on a 16-bit boundary, then ASSERT().
463
464 @param String A pointer to a Null-terminated Unicode string.
465 @param MaxStringLen Max string len in this string.
466
467 @retval 0 An invalid string.
468 @retval Others The length of String.
469
470 **/
471 UINTN
472 StrSizeEx (
473 IN CONST CHAR16 *String,
474 IN UINTN MaxStringLen
475 )
476 {
477 UINTN Length;
478
479 ASSERT (String != NULL && MaxStringLen != 0);
480 ASSERT (((UINTN) String & BIT0) == 0);
481
482 for (Length = 0; *String != L'\0' && MaxStringLen != Length; String++, Length++);
483
484 if (*String != L'\0' && MaxStringLen == Length) {
485 return 0;
486 }
487
488 return (Length + 1) * sizeof (*String);
489 }
490
491 /**
492 Validate the EFI Boot#### variable (VendorGuid/Name)
493
494 @param Variable Boot#### variable data.
495 @param VariableSize Returns the size of the EFI variable that was read
496
497 @retval TRUE The variable data is correct.
498 @retval FALSE The variable data is corrupted.
499
500 **/
501 BOOLEAN
502 ValidateOption (
503 UINT8 *Variable,
504 UINTN VariableSize
505 )
506 {
507 UINT16 FilePathSize;
508 UINT8 *TempPtr;
509 EFI_DEVICE_PATH_PROTOCOL *DevicePath;
510 EFI_DEVICE_PATH_PROTOCOL *TempPath;
511 UINTN TempSize;
512
513 //
514 // Skip the option attribute
515 //
516 TempPtr = Variable;
517 TempPtr += sizeof (UINT32);
518
519 //
520 // Get the option's device path size
521 //
522 FilePathSize = *(UINT16 *) TempPtr;
523 TempPtr += sizeof (UINT16);
524
525 //
526 // Get the option's description string size
527 //
528 TempSize = StrSizeEx ((CHAR16 *) TempPtr, VariableSize);
529 TempPtr += TempSize;
530
531 //
532 // Get the option's device path
533 //
534 DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) TempPtr;
535 TempPtr += FilePathSize;
536
537 //
538 // Validation boot option variable.
539 //
540 if ((FilePathSize == 0) || (TempSize == 0)) {
541 return FALSE;
542 }
543
544 if (TempSize + FilePathSize + sizeof (UINT16) + sizeof (UINT16) > VariableSize) {
545 return FALSE;
546 }
547
548 TempPath = DevicePath;
549 while (FilePathSize > 0) {
550 TempSize = GetDevicePathSizeEx (TempPath, FilePathSize);
551 if (TempSize == 0) {
552 return FALSE;
553 }
554 FilePathSize = (UINT16) (FilePathSize - TempSize);
555 TempPath += TempSize;
556 }
557
558 return TRUE;
559 }
560
561 /**
562 Convert a single character to number.
563 It assumes the input Char is in the scope of L'0' ~ L'9' and L'A' ~ L'F'
564
565 @param Char The input char which need to change to a hex number.
566
567 **/
568 UINTN
569 CharToUint (
570 IN CHAR16 Char
571 )
572 {
573 if ((Char >= L'0') && (Char <= L'9')) {
574 return (UINTN) (Char - L'0');
575 }
576
577 if ((Char >= L'A') && (Char <= L'F')) {
578 return (UINTN) (Char - L'A' + 0xA);
579 }
580
581 ASSERT (FALSE);
582 return 0;
583 }
584
585 /**
586 Build the boot#### or driver#### option from the VariableName, the
587 build boot#### or driver#### will also be linked to BdsCommonOptionList.
588
589 @param BdsCommonOptionList The header of the boot#### or driver#### option
590 link list
591 @param VariableName EFI Variable name indicate if it is boot#### or
592 driver####
593
594 @retval BDS_COMMON_OPTION Get the option just been created
595 @retval NULL Failed to get the new option
596
597 **/
598 BDS_COMMON_OPTION *
599 EFIAPI
600 BdsLibVariableToOption (
601 IN OUT LIST_ENTRY *BdsCommonOptionList,
602 IN CHAR16 *VariableName
603 )
604 {
605 UINT32 Attribute;
606 UINT16 FilePathSize;
607 UINT8 *Variable;
608 UINT8 *TempPtr;
609 UINTN VariableSize;
610 EFI_DEVICE_PATH_PROTOCOL *DevicePath;
611 EFI_DEVICE_PATH_PROTOCOL *TempPath;
612 BDS_COMMON_OPTION *Option;
613 VOID *LoadOptions;
614 UINT32 LoadOptionsSize;
615 CHAR16 *Description;
616 UINT8 NumOff;
617 UINTN TempSize;
618 //
619 // Read the variable. We will never free this data.
620 //
621 Variable = BdsLibGetVariableAndSize (
622 VariableName,
623 &gEfiGlobalVariableGuid,
624 &VariableSize
625 );
626 if (Variable == NULL) {
627 return NULL;
628 }
629
630 //
631 // Validate Boot#### variable data.
632 //
633 if (!ValidateOption(Variable, VariableSize)) {
634 return NULL;
635 }
636
637 //
638 // Notes: careful defined the variable of Boot#### or
639 // Driver####, consider use some macro to abstract the code
640 //
641 //
642 // Get the option attribute
643 //
644 TempPtr = Variable;
645 Attribute = *(UINT32 *) Variable;
646 TempPtr += sizeof (UINT32);
647
648 //
649 // Get the option's device path size
650 //
651 FilePathSize = *(UINT16 *) TempPtr;
652 TempPtr += sizeof (UINT16);
653
654 //
655 // Get the option's description string
656 //
657 Description = (CHAR16 *) TempPtr;
658
659 //
660 // Get the option's description string size
661 //
662 TempSize = StrSizeEx ((CHAR16 *) TempPtr, VariableSize);
663 if (TempSize == 0) {
664 return NULL;
665 }
666 TempPtr += TempSize;
667
668 //
669 // Get the option's device path
670 //
671 DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) TempPtr;
672 TempPtr += FilePathSize;
673
674 //
675 // Validation device path.
676 //
677 TempPath = DevicePath;
678 while (FilePathSize > 0) {
679 TempSize = GetDevicePathSizeEx (TempPath, FilePathSize);
680 if (TempSize == 0) {
681 return NULL;
682 }
683 FilePathSize = (UINT16) (FilePathSize - TempSize);
684 TempPath += TempSize;
685 }
686
687 //
688 // Get load opion data.
689 //
690 LoadOptions = TempPtr;
691 if (VariableSize < (UINTN)(TempPtr - Variable)) {
692 return NULL;
693 }
694 LoadOptionsSize = (UINT32) (VariableSize - (UINTN) (TempPtr - Variable));
695
696 //
697 // The Console variables may have multiple device paths, so make
698 // an Entry for each one.
699 //
700 Option = AllocateZeroPool (sizeof (BDS_COMMON_OPTION));
701 if (Option == NULL) {
702 return NULL;
703 }
704
705 Option->Signature = BDS_LOAD_OPTION_SIGNATURE;
706 Option->DevicePath = AllocateZeroPool (GetDevicePathSize (DevicePath));
707 ASSERT(Option->DevicePath != NULL);
708 CopyMem (Option->DevicePath, DevicePath, GetDevicePathSize (DevicePath));
709
710 Option->Attribute = Attribute;
711 Option->Description = AllocateZeroPool (StrSize (Description));
712 ASSERT(Option->Description != NULL);
713 CopyMem (Option->Description, Description, StrSize (Description));
714
715 Option->LoadOptions = AllocateZeroPool (LoadOptionsSize);
716 ASSERT(Option->LoadOptions != NULL);
717 CopyMem (Option->LoadOptions, LoadOptions, LoadOptionsSize);
718 Option->LoadOptionsSize = LoadOptionsSize;
719
720 //
721 // Get the value from VariableName Unicode string
722 // since the ISO standard assumes ASCII equivalent abbreviations, we can be safe in converting this
723 // Unicode stream to ASCII without any loss in meaning.
724 //
725 if (*VariableName == 'B') {
726 NumOff = (UINT8) (sizeof (L"Boot") / sizeof (CHAR16) - 1);
727 Option->BootCurrent = (UINT16) (CharToUint (VariableName[NumOff+0]) * 0x1000)
728 + (UINT16) (CharToUint (VariableName[NumOff+1]) * 0x100)
729 + (UINT16) (CharToUint (VariableName[NumOff+2]) * 0x10)
730 + (UINT16) (CharToUint (VariableName[NumOff+3]) * 0x1);
731 }
732 //
733 // Insert active entry to BdsDeviceList
734 //
735 if ((Option->Attribute & LOAD_OPTION_ACTIVE) == LOAD_OPTION_ACTIVE) {
736 InsertTailList (BdsCommonOptionList, &Option->Link);
737 FreePool (Variable);
738 return Option;
739 }
740
741 FreePool (Variable);
742 FreePool (Option->Description);
743 FreePool (Option->DevicePath);
744 FreePool (Option->LoadOptions);
745 FreePool (Option);
746 return NULL;
747 }
748
749 /**
750 Process BootOrder, or DriverOrder variables, by calling
751 BdsLibVariableToOption () for each UINT16 in the variables.
752
753 @param BdsCommonOptionList The header of the option list base on variable
754 VariableName
755 @param VariableName EFI Variable name indicate the BootOrder or
756 DriverOrder
757
758 @retval EFI_SUCCESS Success create the boot option or driver option
759 list
760 @retval EFI_OUT_OF_RESOURCES Failed to get the boot option or driver option list
761
762 **/
763 EFI_STATUS
764 EFIAPI
765 BdsLibBuildOptionFromVar (
766 IN LIST_ENTRY *BdsCommonOptionList,
767 IN CHAR16 *VariableName
768 )
769 {
770 UINT16 *OptionOrder;
771 UINTN OptionOrderSize;
772 UINTN Index;
773 BDS_COMMON_OPTION *Option;
774 CHAR16 OptionName[20];
775
776 //
777 // Zero Buffer in order to get all BOOT#### variables
778 //
779 ZeroMem (OptionName, sizeof (OptionName));
780
781 //
782 // Read the BootOrder, or DriverOrder variable.
783 //
784 OptionOrder = BdsLibGetVariableAndSize (
785 VariableName,
786 &gEfiGlobalVariableGuid,
787 &OptionOrderSize
788 );
789 if (OptionOrder == NULL) {
790 return EFI_OUT_OF_RESOURCES;
791 }
792
793 for (Index = 0; Index < OptionOrderSize / sizeof (UINT16); Index++) {
794 if (*VariableName == 'B') {
795 UnicodeSPrint (OptionName, sizeof (OptionName), L"Boot%04x", OptionOrder[Index]);
796 } else {
797 UnicodeSPrint (OptionName, sizeof (OptionName), L"Driver%04x", OptionOrder[Index]);
798 }
799
800 Option = BdsLibVariableToOption (BdsCommonOptionList, OptionName);
801 if (Option != NULL) {
802 Option->BootCurrent = OptionOrder[Index];
803 }
804 }
805
806 FreePool (OptionOrder);
807
808 return EFI_SUCCESS;
809 }
810
811 /**
812 Get boot mode by looking up configuration table and parsing HOB list
813
814 @param BootMode Boot mode from PEI handoff HOB.
815
816 @retval EFI_SUCCESS Successfully get boot mode
817
818 **/
819 EFI_STATUS
820 EFIAPI
821 BdsLibGetBootMode (
822 OUT EFI_BOOT_MODE *BootMode
823 )
824 {
825 *BootMode = GetBootModeHob ();
826
827 return EFI_SUCCESS;
828 }
829
830 /**
831 Read the EFI variable (VendorGuid/Name) and return a dynamically allocated
832 buffer, and the size of the buffer. If failure return NULL.
833
834 @param Name String part of EFI variable name
835 @param VendorGuid GUID part of EFI variable name
836 @param VariableSize Returns the size of the EFI variable that was read
837
838 @return Dynamically allocated memory that contains a copy of the EFI variable
839 Caller is responsible freeing the buffer.
840 @retval NULL Variable was not read
841
842 **/
843 VOID *
844 EFIAPI
845 BdsLibGetVariableAndSize (
846 IN CHAR16 *Name,
847 IN EFI_GUID *VendorGuid,
848 OUT UINTN *VariableSize
849 )
850 {
851 EFI_STATUS Status;
852 UINTN BufferSize;
853 VOID *Buffer;
854
855 Buffer = NULL;
856
857 //
858 // Pass in a zero size buffer to find the required buffer size.
859 //
860 BufferSize = 0;
861 Status = gRT->GetVariable (Name, VendorGuid, NULL, &BufferSize, Buffer);
862 if (Status == EFI_BUFFER_TOO_SMALL) {
863 //
864 // Allocate the buffer to return
865 //
866 Buffer = AllocateZeroPool (BufferSize);
867 if (Buffer == NULL) {
868 return NULL;
869 }
870 //
871 // Read variable into the allocated buffer.
872 //
873 Status = gRT->GetVariable (Name, VendorGuid, NULL, &BufferSize, Buffer);
874 if (EFI_ERROR (Status)) {
875 BufferSize = 0;
876 }
877 }
878
879 *VariableSize = BufferSize;
880 return Buffer;
881 }
882
883 /**
884 Delete the instance in Multi which matches partly with Single instance
885
886 @param Multi A pointer to a multi-instance device path data
887 structure.
888 @param Single A pointer to a single-instance device path data
889 structure.
890
891 @return This function will remove the device path instances in Multi which partly
892 match with the Single, and return the result device path. If there is no
893 remaining device path as a result, this function will return NULL.
894
895 **/
896 EFI_DEVICE_PATH_PROTOCOL *
897 EFIAPI
898 BdsLibDelPartMatchInstance (
899 IN EFI_DEVICE_PATH_PROTOCOL *Multi,
900 IN EFI_DEVICE_PATH_PROTOCOL *Single
901 )
902 {
903 EFI_DEVICE_PATH_PROTOCOL *Instance;
904 EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;
905 EFI_DEVICE_PATH_PROTOCOL *TempNewDevicePath;
906 UINTN InstanceSize;
907 UINTN SingleDpSize;
908 UINTN Size;
909
910 NewDevicePath = NULL;
911 TempNewDevicePath = NULL;
912
913 if (Multi == NULL || Single == NULL) {
914 return Multi;
915 }
916
917 Instance = GetNextDevicePathInstance (&Multi, &InstanceSize);
918 SingleDpSize = GetDevicePathSize (Single) - END_DEVICE_PATH_LENGTH;
919 InstanceSize -= END_DEVICE_PATH_LENGTH;
920
921 while (Instance != NULL) {
922
923 Size = (SingleDpSize < InstanceSize) ? SingleDpSize : InstanceSize;
924
925 if ((CompareMem (Instance, Single, Size) != 0)) {
926 //
927 // Append the device path instance which does not match with Single
928 //
929 TempNewDevicePath = NewDevicePath;
930 NewDevicePath = AppendDevicePathInstance (NewDevicePath, Instance);
931 if (TempNewDevicePath != NULL) {
932 FreePool(TempNewDevicePath);
933 }
934 }
935 FreePool(Instance);
936 Instance = GetNextDevicePathInstance (&Multi, &InstanceSize);
937 InstanceSize -= END_DEVICE_PATH_LENGTH;
938 }
939
940 return NewDevicePath;
941 }
942
943 /**
944 Function compares a device path data structure to that of all the nodes of a
945 second device path instance.
946
947 @param Multi A pointer to a multi-instance device path data
948 structure.
949 @param Single A pointer to a single-instance device path data
950 structure.
951
952 @retval TRUE If the Single device path is contained within Multi device path.
953 @retval FALSE The Single device path is not match within Multi device path.
954
955 **/
956 BOOLEAN
957 EFIAPI
958 BdsLibMatchDevicePaths (
959 IN EFI_DEVICE_PATH_PROTOCOL *Multi,
960 IN EFI_DEVICE_PATH_PROTOCOL *Single
961 )
962 {
963 EFI_DEVICE_PATH_PROTOCOL *DevicePath;
964 EFI_DEVICE_PATH_PROTOCOL *DevicePathInst;
965 UINTN Size;
966
967 if (Multi == NULL || Single == NULL) {
968 return FALSE;
969 }
970
971 DevicePath = Multi;
972 DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);
973
974 //
975 // Search for the match of 'Single' in 'Multi'
976 //
977 while (DevicePathInst != NULL) {
978 //
979 // If the single device path is found in multiple device paths,
980 // return success
981 //
982 if (CompareMem (Single, DevicePathInst, Size) == 0) {
983 FreePool (DevicePathInst);
984 return TRUE;
985 }
986
987 FreePool (DevicePathInst);
988 DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);
989 }
990
991 return FALSE;
992 }
993
994 /**
995 This function prints a series of strings.
996
997 @param ConOut Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
998 @param ... A variable argument list containing series of
999 strings, the last string must be NULL.
1000
1001 @retval EFI_SUCCESS Success print out the string using ConOut.
1002 @retval EFI_STATUS Return the status of the ConOut->OutputString ().
1003
1004 **/
1005 EFI_STATUS
1006 EFIAPI
1007 BdsLibOutputStrings (
1008 IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *ConOut,
1009 ...
1010 )
1011 {
1012 VA_LIST Args;
1013 EFI_STATUS Status;
1014 CHAR16 *String;
1015
1016 Status = EFI_SUCCESS;
1017 VA_START (Args, ConOut);
1018
1019 while (!EFI_ERROR (Status)) {
1020 //
1021 // If String is NULL, then it's the end of the list
1022 //
1023 String = VA_ARG (Args, CHAR16 *);
1024 if (String == NULL) {
1025 break;
1026 }
1027
1028 Status = ConOut->OutputString (ConOut, String);
1029
1030 if (EFI_ERROR (Status)) {
1031 break;
1032 }
1033 }
1034
1035 VA_END(Args);
1036 return Status;
1037 }
1038
1039 //
1040 // Following are BDS Lib functions which contain all the code about setup browser reset reminder feature.
1041 // Setup Browser reset reminder feature is that an reset reminder will be given before user leaves the setup browser if
1042 // user change any option setting which needs a reset to be effective, and the reset will be applied according to the user selection.
1043 //
1044
1045
1046 /**
1047 Enable the setup browser reset reminder feature.
1048 This routine is used in platform tip. If the platform policy need the feature, use the routine to enable it.
1049
1050 **/
1051 VOID
1052 EFIAPI
1053 EnableResetReminderFeature (
1054 VOID
1055 )
1056 {
1057 mFeaturerSwitch = TRUE;
1058 }
1059
1060
1061 /**
1062 Disable the setup browser reset reminder feature.
1063 This routine is used in platform tip. If the platform policy do not want the feature, use the routine to disable it.
1064
1065 **/
1066 VOID
1067 EFIAPI
1068 DisableResetReminderFeature (
1069 VOID
1070 )
1071 {
1072 mFeaturerSwitch = FALSE;
1073 }
1074
1075
1076 /**
1077 Record the info that a reset is required.
1078 A module boolean variable is used to record whether a reset is required.
1079
1080 **/
1081 VOID
1082 EFIAPI
1083 EnableResetRequired (
1084 VOID
1085 )
1086 {
1087 mResetRequired = TRUE;
1088 }
1089
1090
1091 /**
1092 Record the info that no reset is required.
1093 A module boolean variable is used to record whether a reset is required.
1094
1095 **/
1096 VOID
1097 EFIAPI
1098 DisableResetRequired (
1099 VOID
1100 )
1101 {
1102 mResetRequired = FALSE;
1103 }
1104
1105
1106 /**
1107 Check whether platform policy enable the reset reminder feature. The default is enabled.
1108
1109 **/
1110 BOOLEAN
1111 EFIAPI
1112 IsResetReminderFeatureEnable (
1113 VOID
1114 )
1115 {
1116 return mFeaturerSwitch;
1117 }
1118
1119
1120 /**
1121 Check if user changed any option setting which needs a system reset to be effective.
1122
1123 **/
1124 BOOLEAN
1125 EFIAPI
1126 IsResetRequired (
1127 VOID
1128 )
1129 {
1130 return mResetRequired;
1131 }
1132
1133
1134 /**
1135 Check whether a reset is needed, and finish the reset reminder feature.
1136 If a reset is needed, Popup a menu to notice user, and finish the feature
1137 according to the user selection.
1138
1139 **/
1140 VOID
1141 EFIAPI
1142 SetupResetReminder (
1143 VOID
1144 )
1145 {
1146 EFI_INPUT_KEY Key;
1147 CHAR16 *StringBuffer1;
1148 CHAR16 *StringBuffer2;
1149
1150
1151 //
1152 //check any reset required change is applied? if yes, reset system
1153 //
1154 if (IsResetReminderFeatureEnable ()) {
1155 if (IsResetRequired ()) {
1156
1157 StringBuffer1 = AllocateZeroPool (MAX_STRING_LEN * sizeof (CHAR16));
1158 ASSERT (StringBuffer1 != NULL);
1159 StringBuffer2 = AllocateZeroPool (MAX_STRING_LEN * sizeof (CHAR16));
1160 ASSERT (StringBuffer2 != NULL);
1161 StrCpy (StringBuffer1, L"Configuration changed. Reset to apply it Now ? ");
1162 StrCpy (StringBuffer2, L"Enter (YES) / Esc (NO)");
1163 //
1164 // Popup a menu to notice user
1165 //
1166 do {
1167 CreatePopUp (EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE, &Key, StringBuffer1, StringBuffer2, NULL);
1168 } while ((Key.ScanCode != SCAN_ESC) && (Key.UnicodeChar != CHAR_CARRIAGE_RETURN));
1169
1170 FreePool (StringBuffer1);
1171 FreePool (StringBuffer2);
1172 //
1173 // If the user hits the YES Response key, reset
1174 //
1175 if (Key.UnicodeChar == CHAR_CARRIAGE_RETURN) {
1176 gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
1177 }
1178 gST->ConOut->ClearScreen (gST->ConOut);
1179 }
1180 }
1181 }
1182
1183 /**
1184 Get the headers (dos, image, optional header) from an image
1185
1186 @param Device SimpleFileSystem device handle
1187 @param FileName File name for the image
1188 @param DosHeader Pointer to dos header
1189 @param Hdr The buffer in which to return the PE32, PE32+, or TE header.
1190
1191 @retval EFI_SUCCESS Successfully get the machine type.
1192 @retval EFI_NOT_FOUND The file is not found.
1193 @retval EFI_LOAD_ERROR File is not a valid image file.
1194
1195 **/
1196 EFI_STATUS
1197 EFIAPI
1198 BdsLibGetImageHeader (
1199 IN EFI_HANDLE Device,
1200 IN CHAR16 *FileName,
1201 OUT EFI_IMAGE_DOS_HEADER *DosHeader,
1202 OUT EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr
1203 )
1204 {
1205 EFI_STATUS Status;
1206 EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;
1207 EFI_FILE_HANDLE Root;
1208 EFI_FILE_HANDLE ThisFile;
1209 UINTN BufferSize;
1210 UINT64 FileSize;
1211 EFI_FILE_INFO *Info;
1212
1213 Root = NULL;
1214 ThisFile = NULL;
1215 //
1216 // Handle the file system interface to the device
1217 //
1218 Status = gBS->HandleProtocol (
1219 Device,
1220 &gEfiSimpleFileSystemProtocolGuid,
1221 (VOID *) &Volume
1222 );
1223 if (EFI_ERROR (Status)) {
1224 goto Done;
1225 }
1226
1227 Status = Volume->OpenVolume (
1228 Volume,
1229 &Root
1230 );
1231 if (EFI_ERROR (Status)) {
1232 Root = NULL;
1233 goto Done;
1234 }
1235 ASSERT (Root != NULL);
1236 Status = Root->Open (Root, &ThisFile, FileName, EFI_FILE_MODE_READ, 0);
1237 if (EFI_ERROR (Status)) {
1238 goto Done;
1239 }
1240 ASSERT (ThisFile != NULL);
1241
1242 //
1243 // Get file size
1244 //
1245 BufferSize = SIZE_OF_EFI_FILE_INFO + 200;
1246 do {
1247 Info = NULL;
1248 Status = gBS->AllocatePool (EfiBootServicesData, BufferSize, (VOID **) &Info);
1249 if (EFI_ERROR (Status)) {
1250 goto Done;
1251 }
1252 Status = ThisFile->GetInfo (
1253 ThisFile,
1254 &gEfiFileInfoGuid,
1255 &BufferSize,
1256 Info
1257 );
1258 if (!EFI_ERROR (Status)) {
1259 break;
1260 }
1261 if (Status != EFI_BUFFER_TOO_SMALL) {
1262 FreePool (Info);
1263 goto Done;
1264 }
1265 FreePool (Info);
1266 } while (TRUE);
1267
1268 FileSize = Info->FileSize;
1269 FreePool (Info);
1270
1271 //
1272 // Read dos header
1273 //
1274 BufferSize = sizeof (EFI_IMAGE_DOS_HEADER);
1275 Status = ThisFile->Read (ThisFile, &BufferSize, DosHeader);
1276 if (EFI_ERROR (Status) ||
1277 BufferSize < sizeof (EFI_IMAGE_DOS_HEADER) ||
1278 FileSize <= DosHeader->e_lfanew ||
1279 DosHeader->e_magic != EFI_IMAGE_DOS_SIGNATURE) {
1280 Status = EFI_LOAD_ERROR;
1281 goto Done;
1282 }
1283
1284 //
1285 // Move to PE signature
1286 //
1287 Status = ThisFile->SetPosition (ThisFile, DosHeader->e_lfanew);
1288 if (EFI_ERROR (Status)) {
1289 Status = EFI_LOAD_ERROR;
1290 goto Done;
1291 }
1292
1293 //
1294 // Read and check PE signature
1295 //
1296 BufferSize = sizeof (EFI_IMAGE_OPTIONAL_HEADER_UNION);
1297 Status = ThisFile->Read (ThisFile, &BufferSize, Hdr.Pe32);
1298 if (EFI_ERROR (Status) ||
1299 BufferSize < sizeof (EFI_IMAGE_OPTIONAL_HEADER_UNION) ||
1300 Hdr.Pe32->Signature != EFI_IMAGE_NT_SIGNATURE) {
1301 Status = EFI_LOAD_ERROR;
1302 goto Done;
1303 }
1304
1305 //
1306 // Check PE32 or PE32+ magic
1307 //
1308 if (Hdr.Pe32->OptionalHeader.Magic != EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC &&
1309 Hdr.Pe32->OptionalHeader.Magic != EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
1310 Status = EFI_LOAD_ERROR;
1311 goto Done;
1312 }
1313
1314 Done:
1315 if (ThisFile != NULL) {
1316 ThisFile->Close (ThisFile);
1317 }
1318 if (Root != NULL) {
1319 Root->Close (Root);
1320 }
1321 return Status;
1322 }
1323
1324 /**
1325 This routine adjusts the memory information for different memory type and
1326 saves them into the variables for next boot. It conditionally resets the
1327 system when the memory information changes. Platform can reserve memory
1328 large enough (125% of actual requirement) to avoid the reset in the first boot.
1329 **/
1330 VOID
1331 BdsSetMemoryTypeInformationVariable (
1332 VOID
1333 )
1334 {
1335 EFI_STATUS Status;
1336 EFI_MEMORY_TYPE_INFORMATION *PreviousMemoryTypeInformation;
1337 EFI_MEMORY_TYPE_INFORMATION *CurrentMemoryTypeInformation;
1338 UINTN VariableSize;
1339 UINTN Index;
1340 UINTN Index1;
1341 UINT32 Previous;
1342 UINT32 Current;
1343 UINT32 Next;
1344 EFI_HOB_GUID_TYPE *GuidHob;
1345 BOOLEAN MemoryTypeInformationModified;
1346 BOOLEAN MemoryTypeInformationVariableExists;
1347 EFI_BOOT_MODE BootMode;
1348
1349 MemoryTypeInformationModified = FALSE;
1350 MemoryTypeInformationVariableExists = FALSE;
1351
1352
1353 BootMode = GetBootModeHob ();
1354 //
1355 // In BOOT_IN_RECOVERY_MODE, Variable region is not reliable.
1356 //
1357 if (BootMode == BOOT_IN_RECOVERY_MODE) {
1358 return;
1359 }
1360
1361 //
1362 // Only check the the Memory Type Information variable in the boot mode
1363 // other than BOOT_WITH_DEFAULT_SETTINGS because the Memory Type
1364 // Information is not valid in this boot mode.
1365 //
1366 if (BootMode != BOOT_WITH_DEFAULT_SETTINGS) {
1367 VariableSize = 0;
1368 Status = gRT->GetVariable (
1369 EFI_MEMORY_TYPE_INFORMATION_VARIABLE_NAME,
1370 &gEfiMemoryTypeInformationGuid,
1371 NULL,
1372 &VariableSize,
1373 NULL
1374 );
1375 if (Status == EFI_BUFFER_TOO_SMALL) {
1376 MemoryTypeInformationVariableExists = TRUE;
1377 }
1378 }
1379
1380 //
1381 // Retrieve the current memory usage statistics. If they are not found, then
1382 // no adjustments can be made to the Memory Type Information variable.
1383 //
1384 Status = EfiGetSystemConfigurationTable (
1385 &gEfiMemoryTypeInformationGuid,
1386 (VOID **) &CurrentMemoryTypeInformation
1387 );
1388 if (EFI_ERROR (Status) || CurrentMemoryTypeInformation == NULL) {
1389 return;
1390 }
1391
1392 //
1393 // Get the Memory Type Information settings from Hob if they exist,
1394 // PEI is responsible for getting them from variable and build a Hob to save them.
1395 // If the previous Memory Type Information is not available, then set defaults
1396 //
1397 GuidHob = GetFirstGuidHob (&gEfiMemoryTypeInformationGuid);
1398 if (GuidHob == NULL) {
1399 //
1400 // If Platform has not built Memory Type Info into the Hob, just return.
1401 //
1402 return;
1403 }
1404 PreviousMemoryTypeInformation = GET_GUID_HOB_DATA (GuidHob);
1405 VariableSize = GET_GUID_HOB_DATA_SIZE (GuidHob);
1406
1407 //
1408 // Use a heuristic to adjust the Memory Type Information for the next boot
1409 //
1410 DEBUG ((EFI_D_INFO, "Memory Previous Current Next \n"));
1411 DEBUG ((EFI_D_INFO, " Type Pages Pages Pages \n"));
1412 DEBUG ((EFI_D_INFO, "====== ======== ======== ========\n"));
1413
1414 for (Index = 0; PreviousMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
1415
1416 for (Index1 = 0; CurrentMemoryTypeInformation[Index1].Type != EfiMaxMemoryType; Index1++) {
1417 if (PreviousMemoryTypeInformation[Index].Type == CurrentMemoryTypeInformation[Index1].Type) {
1418 break;
1419 }
1420 }
1421 if (CurrentMemoryTypeInformation[Index1].Type == EfiMaxMemoryType) {
1422 continue;
1423 }
1424
1425 //
1426 // Previous is the number of pages pre-allocated
1427 // Current is the number of pages actually needed
1428 //
1429 Previous = PreviousMemoryTypeInformation[Index].NumberOfPages;
1430 Current = CurrentMemoryTypeInformation[Index1].NumberOfPages;
1431 Next = Previous;
1432
1433 //
1434 // Write next varible to 125% * current and Inconsistent Memory Reserved across bootings may lead to S4 fail
1435 //
1436 if (Current < Previous) {
1437 if (BootMode == BOOT_WITH_DEFAULT_SETTINGS) {
1438 Next = Current + (Current >> 2);
1439 } else if (!MemoryTypeInformationVariableExists) {
1440 Next = MAX (Current + (Current >> 2), Previous);
1441 }
1442 } else if (Current > Previous) {
1443 Next = Current + (Current >> 2);
1444 }
1445 if (Next > 0 && Next < 4) {
1446 Next = 4;
1447 }
1448
1449 if (Next != Previous) {
1450 PreviousMemoryTypeInformation[Index].NumberOfPages = Next;
1451 MemoryTypeInformationModified = TRUE;
1452 }
1453
1454 DEBUG ((EFI_D_INFO, " %02x %08x %08x %08x\n", PreviousMemoryTypeInformation[Index].Type, Previous, Current, Next));
1455 }
1456
1457 //
1458 // If any changes were made to the Memory Type Information settings, then set the new variable value;
1459 // Or create the variable in first boot.
1460 //
1461 if (MemoryTypeInformationModified || !MemoryTypeInformationVariableExists) {
1462 Status = gRT->SetVariable (
1463 EFI_MEMORY_TYPE_INFORMATION_VARIABLE_NAME,
1464 &gEfiMemoryTypeInformationGuid,
1465 EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
1466 VariableSize,
1467 PreviousMemoryTypeInformation
1468 );
1469
1470 //
1471 // If the Memory Type Information settings have been modified, then reset the platform
1472 // so the new Memory Type Information setting will be used to guarantee that an S4
1473 // entry/resume cycle will not fail.
1474 //
1475 if (MemoryTypeInformationModified && PcdGetBool (PcdResetOnMemoryTypeInformationChange)) {
1476 DEBUG ((EFI_D_INFO, "Memory Type Information settings change. Warm Reset!!!\n"));
1477 gRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
1478 }
1479 }
1480 }
1481
1482 /**
1483 This routine is kept for backward compatibility.
1484 **/
1485 VOID
1486 EFIAPI
1487 BdsLibSaveMemoryTypeInformation (
1488 VOID
1489 )
1490 {
1491 }
1492
1493
1494 /**
1495 Identify a user and, if authenticated, returns the current user profile handle.
1496
1497 @param[out] User Point to user profile handle.
1498
1499 @retval EFI_SUCCESS User is successfully identified, or user identification
1500 is not supported.
1501 @retval EFI_ACCESS_DENIED User is not successfully identified
1502
1503 **/
1504 EFI_STATUS
1505 EFIAPI
1506 BdsLibUserIdentify (
1507 OUT EFI_USER_PROFILE_HANDLE *User
1508 )
1509 {
1510 EFI_STATUS Status;
1511 EFI_USER_MANAGER_PROTOCOL *Manager;
1512
1513 Status = gBS->LocateProtocol (
1514 &gEfiUserManagerProtocolGuid,
1515 NULL,
1516 (VOID **) &Manager
1517 );
1518 if (EFI_ERROR (Status)) {
1519 return EFI_SUCCESS;
1520 }
1521
1522 return Manager->Identify (Manager, User);
1523 }
1524
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