2 EFI PEI Core dispatch services
4 Copyright (c) 2006, Intel Corporation
5 All rights reserved. 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
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.
18 /// CAR is filled with this initial value during SEC phase
20 #define INIT_CAR_VALUE 0x5AA55AA5
23 EFI_STATUS_CODE_DATA DataHeader
;
25 } PEIM_FILE_HANDLE_EXTENDED_DATA
;
29 Discover all Peims and optional Apriori file in one FV. There is at most one
30 Apriori file in one FV.
33 @param Private - Pointer to the private data passed in from caller
34 @param VolumeHandle - Fv handle.
38 DiscoverPeimsAndOrderWithApriori (
39 IN PEI_CORE_INSTANCE
*Private
,
40 IN EFI_PEI_FV_HANDLE VolumeHandle
44 EFI_PEI_FV_HANDLE FileHandle
;
45 EFI_PEI_FILE_HANDLE AprioriFileHandle
;
52 EFI_PEI_FV_HANDLE TempFileHandles
[FixedPcdGet32 (PcdPeiCoreMaxPeimPerFv
)];
53 EFI_GUID FileGuid
[FixedPcdGet32 (PcdPeiCoreMaxPeimPerFv
)];
56 // Walk the FV and find all the PEIMs and the Apriori file.
58 AprioriFileHandle
= NULL
;
59 Private
->CurrentFvFileHandles
[0] = NULL
;
64 // If the current Fv has been scanned, directly get its cachable record.
66 if (Private
->Fv
[Private
->CurrentPeimFvCount
].ScanFv
) {
67 CopyMem (Private
->CurrentFvFileHandles
, Private
->Fv
[Private
->CurrentPeimFvCount
].FvFileHandles
, sizeof (Private
->CurrentFvFileHandles
));
72 // Go ahead to scan this Fv, and cache FileHandles within it.
74 for (PeimCount
= 0; PeimCount
< FixedPcdGet32 (PcdPeiCoreMaxPeimPerFv
); PeimCount
++) {
75 Status
= PeiFindFileEx (
78 PEI_CORE_INTERNAL_FFS_FILE_DISPATCH_TYPE
,
82 if (Status
!= EFI_SUCCESS
) {
86 Private
->CurrentFvFileHandles
[PeimCount
] = FileHandle
;
89 Private
->AprioriCount
= 0;
90 if (AprioriFileHandle
!= NULL
) {
92 // Read the Apriori file
94 Status
= PeiServicesFfsFindSectionData (EFI_SECTION_RAW
, AprioriFileHandle
, (VOID
**) &Apriori
);
95 if (!EFI_ERROR (Status
)) {
97 // Calculate the number of PEIMs in the A Priori list
99 Private
->AprioriCount
= *(UINT32
*)(((EFI_FFS_FILE_HEADER
*)AprioriFileHandle
)->Size
) & 0x00FFFFFF;
100 Private
->AprioriCount
-= sizeof (EFI_FFS_FILE_HEADER
) - sizeof (EFI_COMMON_SECTION_HEADER
);
101 Private
->AprioriCount
/= sizeof (EFI_GUID
);
103 SetMem (FileGuid
, sizeof (FileGuid
), 0);
104 for (Index
= 0; Index
< PeimCount
; Index
++) {
106 // Make an array of file name guids that matches the FileHandle array so we can convert
107 // quickly from file name to file handle
109 CopyMem (&FileGuid
[Index
], &((EFI_FFS_FILE_HEADER
*)Private
->CurrentFvFileHandles
[Index
])->Name
,sizeof(EFI_GUID
));
113 // Walk through FileGuid array to find out who is invalid PEIM guid in Apriori file.
114 // Add avalible PEIMs in Apriori file into TempFileHandles array at first.
117 for (Index
= 0; Index2
< Private
->AprioriCount
; Index
++) {
118 while (Index2
< Private
->AprioriCount
) {
119 Guid
= ScanGuid (FileGuid
, PeimCount
* sizeof (EFI_GUID
), &Apriori
[Index2
++]);
127 PeimIndex
= ((UINTN
)Guid
- (UINTN
)&FileGuid
[0])/sizeof (EFI_GUID
);
128 TempFileHandles
[Index
] = Private
->CurrentFvFileHandles
[PeimIndex
];
131 // Since we have copied the file handle we can remove it from this list.
133 Private
->CurrentFvFileHandles
[PeimIndex
] = NULL
;
137 // Update valid Aprioricount
139 Private
->AprioriCount
= Index
;
142 // Add in any PEIMs not in the Apriori file
144 for (;Index
< PeimCount
; Index
++) {
145 for (Index2
= 0; Index2
< PeimCount
; Index2
++) {
146 if (Private
->CurrentFvFileHandles
[Index2
] != NULL
) {
147 TempFileHandles
[Index
] = Private
->CurrentFvFileHandles
[Index2
];
148 Private
->CurrentFvFileHandles
[Index2
] = NULL
;
154 //Index the end of array contains re-range Pei moudle.
156 TempFileHandles
[Index
] = NULL
;
159 // Private->CurrentFvFileHandles is currently in PEIM in the FV order.
160 // We need to update it to start with files in the A Priori list and
161 // then the remaining files in PEIM order.
163 CopyMem (Private
->CurrentFvFileHandles
, TempFileHandles
, sizeof (Private
->CurrentFvFileHandles
));
167 // Cache the current Fv File Handle. So that we don't have to scan the Fv again.
168 // Instead, we can retrieve the file handles within this Fv from cachable data.
170 Private
->Fv
[Private
->CurrentPeimFvCount
].ScanFv
= TRUE
;
171 CopyMem (Private
->Fv
[Private
->CurrentPeimFvCount
].FvFileHandles
, Private
->CurrentFvFileHandles
, sizeof (Private
->CurrentFvFileHandles
));
176 Shadow PeiCore module from flash to installed memory.
178 @param PeiServices Pointer to PeiService table
179 @param PrivateInMem PeiCore's private data structure
184 EFI_PEI_SERVICES
**PeiServices
,
185 PEI_CORE_INSTANCE
*PrivateInMem
188 EFI_PEI_FILE_HANDLE PeiCoreFileHandle
;
189 EFI_PHYSICAL_ADDRESS EntryPoint
;
191 UINT32 AuthenticationState
;
193 PeiCoreFileHandle
= NULL
;
196 // Find the PEI Core in the BFV
198 Status
= PeiFindFileEx (
199 (EFI_PEI_FV_HANDLE
)PrivateInMem
->Fv
[0].FvHeader
,
201 EFI_FV_FILETYPE_PEI_CORE
,
205 ASSERT_EFI_ERROR (Status
);
208 // Shadow PEI Core into memory so it will run faster
210 Status
= PeiLoadImage (
212 *((EFI_PEI_FILE_HANDLE
*)&PeiCoreFileHandle
),
216 ASSERT_EFI_ERROR (Status
);
218 return (VOID
*) ((UINTN
) EntryPoint
+ (UINTN
) PeiCore
- (UINTN
) _ModuleEntryPoint
);
222 Conduct PEIM dispatch.
224 @param SecCoreData Points to a data structure containing information about the PEI core's operating
225 environment, such as the size and location of temporary RAM, the stack location and
227 @param Private Pointer to the private data passed in from caller
229 @retval EFI_SUCCESS - Successfully dispatched PEIM.
230 @retval EFI_NOT_FOUND - The dispatch failed.
235 IN CONST EFI_SEC_PEI_HAND_OFF
*SecCoreData
,
236 IN PEI_CORE_INSTANCE
*Private
242 EFI_PEI_SERVICES
**PeiServices
;
243 EFI_PEI_FV_HANDLE VolumeHandle
;
244 EFI_PEI_FILE_HANDLE PeimFileHandle
;
247 UINT32 AuthenticationState
;
248 EFI_PHYSICAL_ADDRESS EntryPoint
;
249 EFI_PEIM_ENTRY_POINT2 PeimEntryPoint
;
250 BOOLEAN PeimNeedingDispatch
;
251 BOOLEAN PeimDispatchOnThisPass
;
252 UINTN SaveCurrentPeimCount
;
253 UINTN SaveCurrentFvCount
;
254 EFI_PEI_FILE_HANDLE SaveCurrentFileHandle
;
255 PEIM_FILE_HANDLE_EXTENDED_DATA ExtendedData
;
256 EFI_PHYSICAL_ADDRESS NewPermenentMemoryBase
;
257 TEMPORARY_RAM_SUPPORT_PPI
*TemporaryRamSupportPpi
;
258 EFI_HOB_HANDOFF_INFO_TABLE
*OldHandOffTable
;
259 EFI_HOB_HANDOFF_INFO_TABLE
*NewHandOffTable
;
262 PEI_CORE_INSTANCE
*PrivateInMem
;
263 UINT64 NewPeiStackSize
;
264 UINT64 OldPeiStackSize
;
266 EFI_FV_FILE_INFO FvFileInfo
;
267 UINTN OldCheckingTop
;
268 UINTN OldCheckingBottom
;
271 PeiServices
= &Private
->PS
;
272 PeimEntryPoint
= NULL
;
273 PeimFileHandle
= NULL
;
276 if ((Private
->PeiMemoryInstalled
) && (Private
->HobList
.HandoffInformationTable
->BootMode
!= BOOT_ON_S3_RESUME
)) {
278 // Once real memory is available, shadow the RegisterForShadow modules. And meanwhile
279 // update the modules' status from PEIM_STATE_REGISITER_FOR_SHADOW to PEIM_STATE_DONE.
281 SaveCurrentPeimCount
= Private
->CurrentPeimCount
;
282 SaveCurrentFvCount
= Private
->CurrentPeimFvCount
;
283 SaveCurrentFileHandle
= Private
->CurrentFileHandle
;
285 for (Index1
= 0; Index1
<= SaveCurrentFvCount
; Index1
++) {
286 for (Index2
= 0; (Index2
< FixedPcdGet32 (PcdPeiCoreMaxPeimPerFv
)) && (Private
->Fv
[Index1
].FvFileHandles
[Index2
] != NULL
); Index2
++) {
287 if (Private
->Fv
[Index1
].PeimState
[Index2
] == PEIM_STATE_REGISITER_FOR_SHADOW
) {
288 PeimFileHandle
= Private
->Fv
[Index1
].FvFileHandles
[Index2
];
289 Status
= PeiLoadImage (
295 if (Status
== EFI_SUCCESS
) {
297 // PEIM_STATE_REGISITER_FOR_SHADOW move to PEIM_STATE_DONE
299 Private
->Fv
[Index1
].PeimState
[Index2
]++;
300 Private
->CurrentFileHandle
= PeimFileHandle
;
301 Private
->CurrentPeimFvCount
= Index1
;
302 Private
->CurrentPeimCount
= Index2
;
304 // Call the PEIM entry point
306 PeimEntryPoint
= (EFI_PEIM_ENTRY_POINT2
)(UINTN
)EntryPoint
;
308 PERF_START (0, "PEIM", NULL
, 0);
309 PeimEntryPoint(PeimFileHandle
, (const EFI_PEI_SERVICES
**) &Private
->PS
);
310 PERF_END (0, "PEIM", NULL
, 0);
314 // Process the Notify list and dispatch any notifies for
315 // newly installed PPIs.
317 ProcessNotifyList (Private
);
321 Private
->CurrentFileHandle
= SaveCurrentFileHandle
;
322 Private
->CurrentPeimFvCount
= SaveCurrentFvCount
;
323 Private
->CurrentPeimCount
= SaveCurrentPeimCount
;
327 // This is the main dispatch loop. It will search known FVs for PEIMs and
328 // attempt to dispatch them. If any PEIM gets dispatched through a single
329 // pass of the dispatcher, it will start over from the Bfv again to see
330 // if any new PEIMs dependencies got satisfied. With a well ordered
331 // FV where PEIMs are found in the order their dependencies are also
332 // satisfied, this dipatcher should run only once.
335 PeimNeedingDispatch
= FALSE
;
336 PeimDispatchOnThisPass
= FALSE
;
338 for (FvCount
= Private
->CurrentPeimFvCount
; FvCount
< Private
->FvCount
; FvCount
++) {
339 Private
->CurrentPeimFvCount
= FvCount
;
340 VolumeHandle
= Private
->Fv
[FvCount
].FvHeader
;
342 if (Private
->CurrentPeimCount
== 0) {
344 // When going through each FV, at first, search Apriori file to
345 // reorder all PEIMs to ensure the PEIMs in Apriori file to get
346 // dispatch at first.
348 DiscoverPeimsAndOrderWithApriori (Private
, VolumeHandle
);
352 // Start to dispatch all modules within the current Fv.
354 for (PeimCount
= Private
->CurrentPeimCount
;
355 (PeimCount
< FixedPcdGet32 (PcdPeiCoreMaxPeimPerFv
)) && (Private
->CurrentFvFileHandles
[PeimCount
] != NULL
);
357 Private
->CurrentPeimCount
= PeimCount
;
358 PeimFileHandle
= Private
->CurrentFileHandle
= Private
->CurrentFvFileHandles
[PeimCount
];
360 if (Private
->Fv
[FvCount
].PeimState
[PeimCount
] == PEIM_STATE_NOT_DISPATCHED
) {
361 if (!DepexSatisfied (Private
, PeimFileHandle
, PeimCount
)) {
362 PeimNeedingDispatch
= TRUE
;
364 Status
= PeiFfsGetFileInfo (PeimFileHandle
, &FvFileInfo
);
365 ASSERT_EFI_ERROR (Status
);
366 if (FvFileInfo
.FileType
== EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE
) {
368 // For Fv type file, Produce new FV PPI and FV hob
370 Status
= ProcessFvFile (PeiServices
, PeimFileHandle
, &AuthenticationState
);
373 // For PEIM driver, Load its entry point
375 Status
= PeiLoadImage (
383 if ((Status
== EFI_SUCCESS
)) {
385 // The PEIM has its dependencies satisfied, and its entry point
386 // has been found, so invoke it.
388 PERF_START (0, "PEIM", NULL
, 0);
390 ExtendedData
.Handle
= (EFI_HANDLE
)PeimFileHandle
;
392 REPORT_STATUS_CODE_WITH_EXTENDED_DATA (
394 FixedPcdGet32(PcdStatusCodeValuePeimDispatch
),
395 (VOID
*)(&ExtendedData
),
396 sizeof (ExtendedData
)
399 Status
= VerifyPeim (Private
, VolumeHandle
, PeimFileHandle
);
400 if (Status
!= EFI_SECURITY_VIOLATION
&& (AuthenticationState
== 0)) {
402 // PEIM_STATE_NOT_DISPATCHED move to PEIM_STATE_DISPATCHED
404 Private
->Fv
[FvCount
].PeimState
[PeimCount
]++;
406 if (FvFileInfo
.FileType
!= EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE
) {
408 // Call the PEIM entry point for PEIM driver
410 PeimEntryPoint
= (EFI_PEIM_ENTRY_POINT2
)(UINTN
)EntryPoint
;
411 PeimEntryPoint (PeimFileHandle
, (const EFI_PEI_SERVICES
**) PeiServices
);
414 PeimDispatchOnThisPass
= TRUE
;
417 REPORT_STATUS_CODE_WITH_EXTENDED_DATA (
419 FixedPcdGet32(PcdStatusCodeValuePeimDispatch
),
420 (VOID
*)(&ExtendedData
),
421 sizeof (ExtendedData
)
423 PERF_END (0, "PEIM", NULL
, 0);
427 if (Private
->SwitchStackSignal
) {
429 // Before switch stack from CAR to permenent memory, caculate the heap and stack
430 // usage in temporary memory for debuging.
433 UINT32
*StackPointer
;
435 for (StackPointer
= (UINT32
*)SecCoreData
->StackBase
;
436 (StackPointer
< (UINT32
*)((UINTN
)SecCoreData
->StackBase
+ SecCoreData
->StackSize
)) \
437 && (*StackPointer
== INIT_CAR_VALUE
);
440 DEBUG ((EFI_D_INFO
, "Total Cache as RAM: %d bytes.\n", SecCoreData
->TemporaryRamSize
));
441 DEBUG ((EFI_D_INFO
, " CAR stack ever used: %d bytes.\n",
442 (SecCoreData
->StackSize
- ((UINTN
) StackPointer
- (UINTN
)SecCoreData
->StackBase
))
444 DEBUG ((EFI_D_INFO
, " CAR heap used: %d bytes.\n",
445 ((UINTN
) Private
->HobList
.HandoffInformationTable
->EfiFreeMemoryBottom
-
446 (UINTN
) Private
->HobList
.Raw
)
451 // Reserve the size of new stack at bottom of physical memory
453 OldPeiStackSize
= Private
->StackSize
;
454 NewPeiStackSize
= (RShiftU64 (Private
->PhysicalMemoryLength
, 1) + EFI_PAGE_MASK
) & ~EFI_PAGE_MASK
;
455 if (FixedPcdGet32(PcdPeiCoreMaxPeiStackSize
) > (UINT32
) NewPeiStackSize
) {
456 Private
->StackSize
= NewPeiStackSize
;
458 Private
->StackSize
= FixedPcdGet32(PcdPeiCoreMaxPeiStackSize
);
462 // In theory, the size of new stack in permenent memory should large than
463 // size of old stack in temporary memory.
464 // But if new stack is smaller than the size of old stack, we also reserve
465 // the size of old stack at bottom of permenent memory.
468 if (Private
->StackSize
> OldPeiStackSize
) {
469 StackGap
= Private
->StackSize
- OldPeiStackSize
;
473 // Update HandOffHob for new installed permenent memory
475 OldHandOffTable
= Private
->HobList
.HandoffInformationTable
;
476 OldCheckingBottom
= (UINTN
)(SecCoreData
->TemporaryRamBase
);
477 OldCheckingTop
= (UINTN
)(OldCheckingBottom
+ SecCoreData
->TemporaryRamSize
);
480 // The whole temporary memory will be migrated to physical memory.
481 // CAUTION: The new base is computed accounding to gap of new stack.
483 NewPermenentMemoryBase
= Private
->PhysicalMemoryBegin
+ StackGap
;
486 // Caculate stack offset and heap offset between CAR and new permement
487 // memory seperately.
489 StackOffset
= (UINTN
) NewPermenentMemoryBase
- (UINTN
) SecCoreData
->StackBase
;
490 HeapOffset
= (INTN
) ((UINTN
) Private
->PhysicalMemoryBegin
+ Private
->StackSize
- \
491 (UINTN
) SecCoreData
->PeiTemporaryRamBase
);
492 DEBUG ((EFI_D_INFO
, "Heap Offset = 0x%X Stack Offset = 0x%X\n", HeapOffset
, StackOffset
));
495 // Caculate new HandOffTable and PrivateData address in permenet memory's stack
497 NewHandOffTable
= (EFI_HOB_HANDOFF_INFO_TABLE
*)((UINTN
)OldHandOffTable
+ HeapOffset
);
498 PrivateInMem
= (PEI_CORE_INSTANCE
*)((UINTN
) (VOID
*) Private
+ StackOffset
);
501 // TemporaryRamSupportPpi is produced by platform's SEC
503 Status
= PeiLocatePpi (
504 (CONST EFI_PEI_SERVICES
**) PeiServices
,
505 &gEfiTemporaryRamSupportPpiGuid
,
508 (VOID
**)&TemporaryRamSupportPpi
512 if (!EFI_ERROR (Status
)) {
514 // Temporary Ram support Ppi is provided by platform, it will copy
515 // temporary memory to permenent memory and do stack switching.
516 // After invoken temporary Ram support, following code's stack is in
517 // memory but not in CAR.
519 TemporaryRamSupportPpi
->TemporaryRamMigration (
520 (CONST EFI_PEI_SERVICES
**) PeiServices
,
521 (EFI_PHYSICAL_ADDRESS
)(UINTN
) SecCoreData
->TemporaryRamBase
,
522 (EFI_PHYSICAL_ADDRESS
)(UINTN
) NewPermenentMemoryBase
,
523 SecCoreData
->TemporaryRamSize
528 // In IA32/x64/Itanium architecture, we need platform provide
529 // TEMPORAY_RAM_MIGRATION_PPI.
537 // Fixup the PeiCore's private data
539 PrivateInMem
->PS
= &PrivateInMem
->ServiceTableShadow
;
540 PrivateInMem
->CpuIo
= &PrivateInMem
->ServiceTableShadow
.CpuIo
;
541 PrivateInMem
->HobList
.Raw
= (VOID
*) ((UINTN
) PrivateInMem
->HobList
.Raw
+ HeapOffset
);
542 PrivateInMem
->StackBase
= (EFI_PHYSICAL_ADDRESS
)(((UINTN
)PrivateInMem
->PhysicalMemoryBegin
+ EFI_PAGE_MASK
) & ~EFI_PAGE_MASK
);
544 PeiServices
= &PrivateInMem
->PS
;
547 // Fixup for PeiService's address
549 SetPeiServicesTablePointer(PeiServices
);
552 // Update HandOffHob for new installed permenent memory
554 NewHandOffTable
->EfiEndOfHobList
=
555 (EFI_PHYSICAL_ADDRESS
)((UINTN
) NewHandOffTable
->EfiEndOfHobList
+ HeapOffset
);
556 NewHandOffTable
->EfiMemoryTop
= PrivateInMem
->PhysicalMemoryBegin
+
557 PrivateInMem
->PhysicalMemoryLength
;
558 NewHandOffTable
->EfiMemoryBottom
= PrivateInMem
->PhysicalMemoryBegin
;
559 NewHandOffTable
->EfiFreeMemoryTop
= PrivateInMem
->FreePhysicalMemoryTop
;
560 NewHandOffTable
->EfiFreeMemoryBottom
= NewHandOffTable
->EfiEndOfHobList
+
561 sizeof (EFI_HOB_GENERIC_HEADER
);
564 // We need convert the PPI desciptor's pointer
566 ConvertPpiPointers (PrivateInMem
,
572 DEBUG ((EFI_D_INFO
, "Stack Hob: BaseAddress=0x%X Length=0x%X\n",
573 (UINTN
)PrivateInMem
->StackBase
,
574 PrivateInMem
->StackSize
));
575 BuildStackHob (PrivateInMem
->StackBase
, PrivateInMem
->StackSize
);
578 // After the whole temporary memory is migrated, then we can allocate page in
581 PrivateInMem
->PeiMemoryInstalled
= TRUE
;
584 // Restart scan of all PEIMs on next pass
586 PrivateInMem
->CurrentPeimCount
= 0;
589 // Shadow PEI Core. When permanent memory is avaiable, shadow
590 // PEI Core and PEIMs to get high performance.
592 PrivateInMem
->ShadowedPeiCore
= ShadowPeiCore (
597 // Process the Notify list and dispatch any notifies for
598 // newly installed PPIs.
600 ProcessNotifyList (PrivateInMem
);
605 PeiCore (SecCoreData
, NULL
, PrivateInMem
);
608 // Code should not come here
610 ASSERT_EFI_ERROR(FALSE
);
614 // Process the Notify list and dispatch any notifies for
615 // newly installed PPIs.
617 ProcessNotifyList (Private
);
619 if ((Private
->PeiMemoryInstalled
) && (Private
->Fv
[FvCount
].PeimState
[PeimCount
] == PEIM_STATE_REGISITER_FOR_SHADOW
) && \
620 (Private
->HobList
.HandoffInformationTable
->BootMode
!= BOOT_ON_S3_RESUME
)) {
622 // If memory is availble we shadow images by default for performance reasons.
623 // We call the entry point a 2nd time so the module knows it's shadowed.
625 //PERF_START (PeiServices, L"PEIM", PeimFileHandle, 0);
626 PeimEntryPoint (PeimFileHandle
, (const EFI_PEI_SERVICES
**) PeiServices
);
627 //PERF_END (PeiServices, L"PEIM", PeimFileHandle, 0);
630 // PEIM_STATE_REGISITER_FOR_SHADOW move to PEIM_STATE_DONE
632 Private
->Fv
[FvCount
].PeimState
[PeimCount
]++;
635 // Process the Notify list and dispatch any notifies for
636 // newly installed PPIs.
638 ProcessNotifyList (Private
);
645 // We set to NULL here to optimize the 2nd entry to this routine after
646 // memory is found. This reprevents rescanning of the FV. We set to
647 // NULL here so we start at the begining of the next FV
649 Private
->CurrentFileHandle
= NULL
;
650 Private
->CurrentPeimCount
= 0;
652 // Before walking through the next FV,Private->CurrentFvFileHandles[]should set to NULL
654 SetMem (Private
->CurrentFvFileHandles
, sizeof (Private
->CurrentFvFileHandles
), 0);
658 // Before making another pass, we should set Private->CurrentPeimFvCount =0 to go
659 // through all the FV.
661 Private
->CurrentPeimFvCount
= 0;
664 // PeimNeedingDispatch being TRUE means we found a PEIM that did not get
665 // dispatched. So we need to make another pass
667 // PeimDispatchOnThisPass being TRUE means we dispatched a PEIM on this
668 // pass. If we did not dispatch a PEIM there is no point in trying again
669 // as it will fail the next time too (nothing has changed).
671 } while (PeimNeedingDispatch
&& PeimDispatchOnThisPass
);
676 Initialize the Dispatcher's data members
678 @param PrivateData PeiCore's private data structure
679 @param OldCoreData Old data from SecCore
680 NULL if being run in non-permament memory mode.
681 @param SecCoreData Points to a data structure containing information about the PEI core's operating
682 environment, such as the size and location of temporary RAM, the stack location and
689 InitializeDispatcherData (
690 IN PEI_CORE_INSTANCE
*PrivateData
,
691 IN PEI_CORE_INSTANCE
*OldCoreData
,
692 IN CONST EFI_SEC_PEI_HAND_OFF
*SecCoreData
695 if (OldCoreData
== NULL
) {
696 PeiInitializeFv (PrivateData
, SecCoreData
);
703 This routine parses the Dependency Expression, if available, and
704 decides if the module can be executed.
707 @param Private PeiCore's private data structure
708 @param FileHandle PEIM's file handle
709 @param PeimCount Peim count in all dispatched PEIMs.
711 @retval TRUE Can be dispatched
712 @retval FALSE Cannot be dispatched
717 IN PEI_CORE_INSTANCE
*Private
,
718 IN EFI_PEI_FILE_HANDLE FileHandle
,
725 if (PeimCount
< Private
->AprioriCount
) {
727 // If its in the A priori file then we set Depex to TRUE
733 // Depex section not in the encapsulated section.
735 Status
= PeiServicesFfsFindSectionData (
736 EFI_SECTION_PEI_DEPEX
,
741 if (EFI_ERROR (Status
)) {
743 // If there is no DEPEX, assume the module can be executed
749 // Evaluate a given DEPEX
751 return PeimDispatchReadiness (&Private
->PS
, DepexData
);
755 This routine enable a PEIM to register itself to shadow when PEI Foundation
756 discovery permanent memory.
758 @param FileHandle File handle of a PEIM.
760 @retval EFI_NOT_FOUND The file handle doesn't point to PEIM itself.
761 @retval EFI_ALREADY_STARTED Indicate that the PEIM has been registered itself.
762 @retval EFI_SUCCESS Successfully to register itself.
767 PeiRegisterForShadow (
768 IN EFI_PEI_FILE_HANDLE FileHandle
771 PEI_CORE_INSTANCE
*Private
;
772 Private
= PEI_CORE_INSTANCE_FROM_PS_THIS (GetPeiServicesTablePointer ());
774 if (Private
->CurrentFileHandle
!= FileHandle
) {
776 // The FileHandle must be for the current PEIM
778 return EFI_NOT_FOUND
;
781 if (Private
->Fv
[Private
->CurrentPeimFvCount
].PeimState
[Private
->CurrentPeimCount
] >= PEIM_STATE_REGISITER_FOR_SHADOW
) {
783 // If the PEIM has already entered the PEIM_STATE_REGISTER_FOR_SHADOW or PEIM_STATE_DONE then it's already been started
785 return EFI_ALREADY_STARTED
;
788 Private
->Fv
[Private
->CurrentPeimFvCount
].PeimState
[Private
->CurrentPeimCount
] = PEIM_STATE_REGISITER_FOR_SHADOW
;
794 Get Fv image from the FV type file, then install FV INFO ppi, Build FV hob.
796 @param PeiServices Pointer to the PEI Core Services Table.
797 @param FvFileHandle File handle of a Fv type file.
798 @param AuthenticationState Pointer to attestation authentication state of image.
801 @retval EFI_NOT_FOUND FV image can't be found.
802 @retval EFI_SUCCESS Successfully to process it.
807 IN EFI_PEI_SERVICES
**PeiServices
,
808 IN EFI_PEI_FILE_HANDLE FvFileHandle
,
809 OUT UINT32
*AuthenticationState
813 EFI_PEI_FV_HANDLE FvImageHandle
;
814 EFI_FV_INFO FvImageInfo
;
817 EFI_PEI_HOB_POINTERS HobFv2
;
820 *AuthenticationState
= 0;
823 // Check if this EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE file has already
826 HobFv2
.Raw
= GetHobList ();
827 while ((HobFv2
.Raw
= GetNextHob (EFI_HOB_TYPE_FV2
, HobFv2
.Raw
)) != NULL
) {
828 if (CompareGuid (&(((EFI_FFS_FILE_HEADER
*)FvFileHandle
)->Name
), &HobFv2
.FirmwareVolume2
->FileName
)) {
830 // this FILE has been dispatched, it will not be dispatched again.
834 HobFv2
.Raw
= GET_NEXT_HOB (HobFv2
);
838 // Find FvImage in FvFile
840 Status
= PeiFfsFindSectionData (
841 (CONST EFI_PEI_SERVICES
**) PeiServices
,
842 EFI_SECTION_FIRMWARE_VOLUME_IMAGE
,
844 (VOID
**)&FvImageHandle
847 if (EFI_ERROR (Status
)) {
851 // Collect FvImage Info.
853 Status
= PeiFfsGetVolumeInfo (FvImageHandle
, &FvImageInfo
);
854 ASSERT_EFI_ERROR (Status
);
856 // FvAlignment must be more than 8 bytes required by FvHeader structure.
858 FvAlignment
= 1 << ((FvImageInfo
.FvAttributes
& EFI_FVB2_ALIGNMENT
) >> 16);
859 if (FvAlignment
< 8) {
865 if ((UINTN
) FvImageInfo
.FvStart
% FvAlignment
!= 0) {
866 FvBuffer
= AllocateAlignedPages (EFI_SIZE_TO_PAGES ((UINT32
) FvImageInfo
.FvSize
), FvAlignment
);
867 if (FvBuffer
== NULL
) {
868 return EFI_OUT_OF_RESOURCES
;
870 CopyMem (FvBuffer
, FvImageInfo
.FvStart
, (UINTN
) FvImageInfo
.FvSize
);
872 // Update FvImageInfo after reload FvImage to new aligned memory
874 PeiFfsGetVolumeInfo ((EFI_PEI_FV_HANDLE
) FvBuffer
, &FvImageInfo
);
878 // Install FvPpi and Build FvHob
880 PiLibInstallFvInfoPpi (
883 (UINT32
) FvImageInfo
.FvSize
,
884 &(FvImageInfo
.FvName
),
885 &(((EFI_FFS_FILE_HEADER
*)FvFileHandle
)->Name
)
889 // Inform HOB consumer phase, i.e. DXE core, the existance of this FV
892 (EFI_PHYSICAL_ADDRESS
) (UINTN
) FvImageInfo
.FvStart
,
896 // Makes the encapsulated volume show up in DXE phase to skip processing of
897 // encapsulated file again.
900 (EFI_PHYSICAL_ADDRESS
) (UINTN
) FvImageInfo
.FvStart
,
903 &(((EFI_FFS_FILE_HEADER
*)FvFileHandle
)->Name
)