]> git.proxmox.com Git - mirror_edk2.git/blob - MdeModulePkg/Core/PiSmmCore/PiSmmCore.c
projects / mirror_edk2.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
MdeModulePkg/PiSmmCore: Add MemoryAttributes support.
[mirror_edk2.git] / MdeModulePkg / Core / PiSmmCore / PiSmmCore.c
1 /** @file
2 SMM Core Main Entry Point
3
4 Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available
6 under the terms and conditions of the BSD License which accompanies this
7 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 "PiSmmCore.h"
16
17 //
18 // Physical pointer to private structure shared between SMM IPL and the SMM Core
19 //
20 SMM_CORE_PRIVATE_DATA *gSmmCorePrivate;
21
22 //
23 // SMM Core global variable for SMM System Table. Only accessed as a physical structure in SMRAM.
24 //
25 EFI_SMM_SYSTEM_TABLE2 gSmmCoreSmst = {
26 {
27 SMM_SMST_SIGNATURE,
28 EFI_SMM_SYSTEM_TABLE2_REVISION,
29 sizeof (gSmmCoreSmst.Hdr)
30 },
31 NULL, // SmmFirmwareVendor
32 0, // SmmFirmwareRevision
33 SmmInstallConfigurationTable,
34 {
35 {
36 (EFI_SMM_CPU_IO2) SmmEfiNotAvailableYetArg5, // SmmMemRead
37 (EFI_SMM_CPU_IO2) SmmEfiNotAvailableYetArg5 // SmmMemWrite
38 },
39 {
40 (EFI_SMM_CPU_IO2) SmmEfiNotAvailableYetArg5, // SmmIoRead
41 (EFI_SMM_CPU_IO2) SmmEfiNotAvailableYetArg5 // SmmIoWrite
42 }
43 },
44 SmmAllocatePool,
45 SmmFreePool,
46 SmmAllocatePages,
47 SmmFreePages,
48 NULL, // SmmStartupThisAp
49 0, // CurrentlyExecutingCpu
50 0, // NumberOfCpus
51 NULL, // CpuSaveStateSize
52 NULL, // CpuSaveState
53 0, // NumberOfTableEntries
54 NULL, // SmmConfigurationTable
55 SmmInstallProtocolInterface,
56 SmmUninstallProtocolInterface,
57 SmmHandleProtocol,
58 SmmRegisterProtocolNotify,
59 SmmLocateHandle,
60 SmmLocateProtocol,
61 SmiManage,
62 SmiHandlerRegister,
63 SmiHandlerUnRegister
64 };
65
66 //
67 // Flag to determine if the platform has performed a legacy boot.
68 // If this flag is TRUE, then the runtime code and runtime data associated with the
69 // SMM IPL are converted to free memory, so the SMM Core must guarantee that is
70 // does not touch of the code/data associated with the SMM IPL if this flag is TRUE.
71 //
72 BOOLEAN mInLegacyBoot = FALSE;
73
74 //
75 // Table of SMI Handlers that are registered by the SMM Core when it is initialized
76 //
77 SMM_CORE_SMI_HANDLERS mSmmCoreSmiHandlers[] = {
78 { SmmDriverDispatchHandler, &gEfiEventDxeDispatchGuid, NULL, TRUE },
79 { SmmReadyToLockHandler, &gEfiDxeSmmReadyToLockProtocolGuid, NULL, TRUE },
80 { SmmLegacyBootHandler, &gEfiEventLegacyBootGuid, NULL, FALSE },
81 { SmmExitBootServicesHandler, &gEfiEventExitBootServicesGuid, NULL, FALSE },
82 { SmmReadyToBootHandler, &gEfiEventReadyToBootGuid, NULL, FALSE },
83 { SmmEndOfDxeHandler, &gEfiEndOfDxeEventGroupGuid, NULL, TRUE },
84 { NULL, NULL, NULL, FALSE }
85 };
86
87 UINTN mFullSmramRangeCount;
88 EFI_SMRAM_DESCRIPTOR *mFullSmramRanges;
89
90 EFI_SMM_DRIVER_ENTRY *mSmmCoreDriverEntry;
91
92 EFI_LOADED_IMAGE_PROTOCOL *mSmmCoreLoadedImage;
93
94 /**
95 Place holder function until all the SMM System Table Service are available.
96
97 Note: This function is only used by SMRAM invocation. It is never used by DXE invocation.
98
99 @param Arg1 Undefined
100 @param Arg2 Undefined
101 @param Arg3 Undefined
102 @param Arg4 Undefined
103 @param Arg5 Undefined
104
105 @return EFI_NOT_AVAILABLE_YET
106
107 **/
108 EFI_STATUS
109 EFIAPI
110 SmmEfiNotAvailableYetArg5 (
111 UINTN Arg1,
112 UINTN Arg2,
113 UINTN Arg3,
114 UINTN Arg4,
115 UINTN Arg5
116 )
117 {
118 //
119 // This function should never be executed. If it does, then the architectural protocols
120 // have not been designed correctly.
121 //
122 return EFI_NOT_AVAILABLE_YET;
123 }
124
125 /**
126 Software SMI handler that is called when a Legacy Boot event is signalled. The SMM
127 Core uses this signal to know that a Legacy Boot has been performed and that
128 gSmmCorePrivate that is shared between the UEFI and SMM execution environments can
129 not be accessed from SMM anymore since that structure is considered free memory by
130 a legacy OS. Then the SMM Core also install SMM Legacy Boot protocol to notify SMM
131 driver that system enter legacy boot.
132
133 @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().
134 @param Context Points to an optional handler context which was specified when the handler was registered.
135 @param CommBuffer A pointer to a collection of data in memory that will
136 be conveyed from a non-SMM environment into an SMM environment.
137 @param CommBufferSize The size of the CommBuffer.
138
139 @return Status Code
140
141 **/
142 EFI_STATUS
143 EFIAPI
144 SmmLegacyBootHandler (
145 IN EFI_HANDLE DispatchHandle,
146 IN CONST VOID *Context, OPTIONAL
147 IN OUT VOID *CommBuffer, OPTIONAL
148 IN OUT UINTN *CommBufferSize OPTIONAL
149 )
150 {
151 EFI_STATUS Status;
152 EFI_HANDLE SmmHandle;
153
154 //
155 // Install SMM Legacy Boot protocol.
156 //
157 SmmHandle = NULL;
158 Status = SmmInstallProtocolInterface (
159 &SmmHandle,
160 &gEdkiiSmmLegacyBootProtocolGuid,
161 EFI_NATIVE_INTERFACE,
162 NULL
163 );
164
165 mInLegacyBoot = TRUE;
166
167 SmiHandlerUnRegister (DispatchHandle);
168
169 return Status;
170 }
171
172 /**
173 Software SMI handler that is called when an Exit Boot Services event is signalled.
174 Then the SMM Core also install SMM Exit Boot Services protocol to notify SMM driver
175 that system enter exit boot services.
176
177 @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().
178 @param Context Points to an optional handler context which was specified when the handler was registered.
179 @param CommBuffer A pointer to a collection of data in memory that will
180 be conveyed from a non-SMM environment into an SMM environment.
181 @param CommBufferSize The size of the CommBuffer.
182
183 @return Status Code
184
185 **/
186 EFI_STATUS
187 EFIAPI
188 SmmExitBootServicesHandler (
189 IN EFI_HANDLE DispatchHandle,
190 IN CONST VOID *Context, OPTIONAL
191 IN OUT VOID *CommBuffer, OPTIONAL
192 IN OUT UINTN *CommBufferSize OPTIONAL
193 )
194 {
195 EFI_STATUS Status;
196 EFI_HANDLE SmmHandle;
197
198 //
199 // Install SMM Exit Boot Services protocol.
200 //
201 SmmHandle = NULL;
202 Status = SmmInstallProtocolInterface (
203 &SmmHandle,
204 &gEdkiiSmmExitBootServicesProtocolGuid,
205 EFI_NATIVE_INTERFACE,
206 NULL
207 );
208
209 SmiHandlerUnRegister (DispatchHandle);
210
211 return Status;
212 }
213
214 /**
215 Software SMI handler that is called when an Ready To Boot event is signalled.
216 Then the SMM Core also install SMM Ready To Boot protocol to notify SMM driver
217 that system enter ready to boot.
218
219 @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().
220 @param Context Points to an optional handler context which was specified when the handler was registered.
221 @param CommBuffer A pointer to a collection of data in memory that will
222 be conveyed from a non-SMM environment into an SMM environment.
223 @param CommBufferSize The size of the CommBuffer.
224
225 @return Status Code
226
227 **/
228 EFI_STATUS
229 EFIAPI
230 SmmReadyToBootHandler (
231 IN EFI_HANDLE DispatchHandle,
232 IN CONST VOID *Context, OPTIONAL
233 IN OUT VOID *CommBuffer, OPTIONAL
234 IN OUT UINTN *CommBufferSize OPTIONAL
235 )
236 {
237 EFI_STATUS Status;
238 EFI_HANDLE SmmHandle;
239
240 //
241 // Install SMM Ready To Boot protocol.
242 //
243 SmmHandle = NULL;
244 Status = SmmInstallProtocolInterface (
245 &SmmHandle,
246 &gEdkiiSmmReadyToBootProtocolGuid,
247 EFI_NATIVE_INTERFACE,
248 NULL
249 );
250
251 SmiHandlerUnRegister (DispatchHandle);
252
253 return Status;
254 }
255
256 /**
257 Software SMI handler that is called when the DxeSmmReadyToLock protocol is added
258 or if gEfiEventReadyToBootGuid is signalled. This function unregisters the
259 Software SMIs that are nor required after SMRAM is locked and installs the
260 SMM Ready To Lock Protocol so SMM Drivers are informed that SMRAM is about
261 to be locked. It also verifies the SMM CPU I/O 2 Protocol has been installed
262 and NULLs gBS and gST because they can not longer be used after SMRAM is locked.
263
264 @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().
265 @param Context Points to an optional handler context which was specified when the handler was registered.
266 @param CommBuffer A pointer to a collection of data in memory that will
267 be conveyed from a non-SMM environment into an SMM environment.
268 @param CommBufferSize The size of the CommBuffer.
269
270 @return Status Code
271
272 **/
273 EFI_STATUS
274 EFIAPI
275 SmmReadyToLockHandler (
276 IN EFI_HANDLE DispatchHandle,
277 IN CONST VOID *Context, OPTIONAL
278 IN OUT VOID *CommBuffer, OPTIONAL
279 IN OUT UINTN *CommBufferSize OPTIONAL
280 )
281 {
282 EFI_STATUS Status;
283 UINTN Index;
284 EFI_HANDLE SmmHandle;
285 VOID *Interface;
286
287 //
288 // Unregister SMI Handlers that are no required after the SMM driver dispatch is stopped
289 //
290 for (Index = 0; mSmmCoreSmiHandlers[Index].HandlerType != NULL; Index++) {
291 if (mSmmCoreSmiHandlers[Index].UnRegister) {
292 SmiHandlerUnRegister (mSmmCoreSmiHandlers[Index].DispatchHandle);
293 }
294 }
295
296 //
297 // Install SMM Ready to lock protocol
298 //
299 SmmHandle = NULL;
300 Status = SmmInstallProtocolInterface (
301 &SmmHandle,
302 &gEfiSmmReadyToLockProtocolGuid,
303 EFI_NATIVE_INTERFACE,
304 NULL
305 );
306
307 //
308 // Make sure SMM CPU I/O 2 Procol has been installed into the handle database
309 //
310 Status = SmmLocateProtocol (&gEfiSmmCpuIo2ProtocolGuid, NULL, &Interface);
311
312 //
313 // Print a message on a debug build if the SMM CPU I/O 2 Protocol is not installed
314 //
315 DEBUG_CODE_BEGIN ();
316 if (EFI_ERROR (Status)) {
317 DEBUG ((DEBUG_ERROR, "\nSMM: SmmCpuIo Arch Protocol not present!!\n"));
318 }
319 DEBUG_CODE_END ();
320
321 //
322 // Assert if the CPU I/O 2 Protocol is not installed
323 //
324 ASSERT_EFI_ERROR (Status);
325
326 //
327 // Display any drivers that were not dispatched because dependency expression
328 // evaluated to false if this is a debug build
329 //
330 DEBUG_CODE_BEGIN ();
331 SmmDisplayDiscoveredNotDispatched ();
332 DEBUG_CODE_END ();
333
334 //
335 // Not allowed to use gST or gBS after lock
336 //
337 gST = NULL;
338 gBS = NULL;
339
340 SmramProfileReadyToLock ();
341
342 return Status;
343 }
344
345 /**
346 Software SMI handler that is called when the EndOfDxe event is signalled.
347 This function installs the SMM EndOfDxe Protocol so SMM Drivers are informed that
348 platform code will invoke 3rd part code.
349
350 @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().
351 @param Context Points to an optional handler context which was specified when the handler was registered.
352 @param CommBuffer A pointer to a collection of data in memory that will
353 be conveyed from a non-SMM environment into an SMM environment.
354 @param CommBufferSize The size of the CommBuffer.
355
356 @return Status Code
357
358 **/
359 EFI_STATUS
360 EFIAPI
361 SmmEndOfDxeHandler (
362 IN EFI_HANDLE DispatchHandle,
363 IN CONST VOID *Context, OPTIONAL
364 IN OUT VOID *CommBuffer, OPTIONAL
365 IN OUT UINTN *CommBufferSize OPTIONAL
366 )
367 {
368 EFI_STATUS Status;
369 EFI_HANDLE SmmHandle;
370
371 DEBUG ((EFI_D_INFO, "SmmEndOfDxeHandler\n"));
372 //
373 // Install SMM EndOfDxe protocol
374 //
375 SmmHandle = NULL;
376 Status = SmmInstallProtocolInterface (
377 &SmmHandle,
378 &gEfiSmmEndOfDxeProtocolGuid,
379 EFI_NATIVE_INTERFACE,
380 NULL
381 );
382 return Status;
383 }
384
385 /**
386 Determine if two buffers overlap in memory.
387
388 @param[in] Buff1 Pointer to first buffer
389 @param[in] Size1 Size of Buff1
390 @param[in] Buff2 Pointer to second buffer
391 @param[in] Size2 Size of Buff2
392
393 @retval TRUE Buffers overlap in memory.
394 @retval FALSE Buffer doesn't overlap.
395
396 **/
397 BOOLEAN
398 InternalIsBufferOverlapped (
399 IN UINT8 *Buff1,
400 IN UINTN Size1,
401 IN UINT8 *Buff2,
402 IN UINTN Size2
403 )
404 {
405 //
406 // If buff1's end is less than the start of buff2, then it's ok.
407 // Also, if buff1's start is beyond buff2's end, then it's ok.
408 //
409 if (((Buff1 + Size1) <= Buff2) || (Buff1 >= (Buff2 + Size2))) {
410 return FALSE;
411 }
412
413 return TRUE;
414 }
415
416 /**
417 The main entry point to SMM Foundation.
418
419 Note: This function is only used by SMRAM invocation. It is never used by DXE invocation.
420
421 @param SmmEntryContext Processor information and functionality
422 needed by SMM Foundation.
423
424 **/
425 VOID
426 EFIAPI
427 SmmEntryPoint (
428 IN CONST EFI_SMM_ENTRY_CONTEXT *SmmEntryContext
429 )
430 {
431 EFI_STATUS Status;
432 EFI_SMM_COMMUNICATE_HEADER *CommunicateHeader;
433 BOOLEAN InLegacyBoot;
434 BOOLEAN IsOverlapped;
435
436 PERF_START (NULL, "SMM", NULL, 0) ;
437
438 //
439 // Update SMST with contents of the SmmEntryContext structure
440 //
441 gSmmCoreSmst.SmmStartupThisAp = SmmEntryContext->SmmStartupThisAp;
442 gSmmCoreSmst.CurrentlyExecutingCpu = SmmEntryContext->CurrentlyExecutingCpu;
443 gSmmCoreSmst.NumberOfCpus = SmmEntryContext->NumberOfCpus;
444 gSmmCoreSmst.CpuSaveStateSize = SmmEntryContext->CpuSaveStateSize;
445 gSmmCoreSmst.CpuSaveState = SmmEntryContext->CpuSaveState;
446
447 //
448 // Call platform hook before Smm Dispatch
449 //
450 PlatformHookBeforeSmmDispatch ();
451
452 //
453 // If a legacy boot has occured, then make sure gSmmCorePrivate is not accessed
454 //
455 InLegacyBoot = mInLegacyBoot;
456 if (!InLegacyBoot) {
457 //
458 // Mark the InSmm flag as TRUE, it will be used by SmmBase2 protocol
459 //
460 gSmmCorePrivate->InSmm = TRUE;
461
462 //
463 // Check to see if this is a Synchronous SMI sent through the SMM Communication
464 // Protocol or an Asynchronous SMI
465 //
466 if (gSmmCorePrivate->CommunicationBuffer != NULL) {
467 //
468 // Synchronous SMI for SMM Core or request from Communicate protocol
469 //
470 IsOverlapped = InternalIsBufferOverlapped (
471 (UINT8 *) gSmmCorePrivate->CommunicationBuffer,
472 gSmmCorePrivate->BufferSize,
473 (UINT8 *) gSmmCorePrivate,
474 sizeof (*gSmmCorePrivate)
475 );
476 if (!SmmIsBufferOutsideSmmValid ((UINTN)gSmmCorePrivate->CommunicationBuffer, gSmmCorePrivate->BufferSize) || IsOverlapped) {
477 //
478 // If CommunicationBuffer is not in valid address scope,
479 // or there is overlap between gSmmCorePrivate and CommunicationBuffer,
480 // return EFI_INVALID_PARAMETER
481 //
482 gSmmCorePrivate->CommunicationBuffer = NULL;
483 gSmmCorePrivate->ReturnStatus = EFI_INVALID_PARAMETER;
484 } else {
485 CommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *)gSmmCorePrivate->CommunicationBuffer;
486 gSmmCorePrivate->BufferSize -= OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data);
487 Status = SmiManage (
488 &CommunicateHeader->HeaderGuid,
489 NULL,
490 CommunicateHeader->Data,
491 &gSmmCorePrivate->BufferSize
492 );
493 //
494 // Update CommunicationBuffer, BufferSize and ReturnStatus
495 // Communicate service finished, reset the pointer to CommBuffer to NULL
496 //
497 gSmmCorePrivate->BufferSize += OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data);
498 gSmmCorePrivate->CommunicationBuffer = NULL;
499 gSmmCorePrivate->ReturnStatus = (Status == EFI_SUCCESS) ? EFI_SUCCESS : EFI_NOT_FOUND;
500 }
501 }
502 }
503
504 //
505 // Process Asynchronous SMI sources
506 //
507 SmiManage (NULL, NULL, NULL, NULL);
508
509 //
510 // Call platform hook after Smm Dispatch
511 //
512 PlatformHookAfterSmmDispatch ();
513
514 //
515 // If a legacy boot has occured, then make sure gSmmCorePrivate is not accessed
516 //
517 if (!InLegacyBoot) {
518 //
519 // Clear the InSmm flag as we are going to leave SMM
520 //
521 gSmmCorePrivate->InSmm = FALSE;
522 }
523
524 PERF_END (NULL, "SMM", NULL, 0) ;
525 }
526
527 /**
528 Install LoadedImage protocol for SMM Core.
529 **/
530 VOID
531 SmmCoreInstallLoadedImage (
532 VOID
533 )
534 {
535 EFI_STATUS Status;
536 EFI_HANDLE Handle;
537
538 //
539 // Allocate a Loaded Image Protocol in EfiBootServicesData
540 //
541 Status = gBS->AllocatePool (EfiBootServicesData, sizeof(EFI_LOADED_IMAGE_PROTOCOL), (VOID **)&mSmmCoreLoadedImage);
542 ASSERT_EFI_ERROR (Status);
543
544 ZeroMem (mSmmCoreLoadedImage, sizeof (EFI_LOADED_IMAGE_PROTOCOL));
545 //
546 // Fill in the remaining fields of the Loaded Image Protocol instance.
547 // Note: ImageBase is an SMRAM address that can not be accessed outside of SMRAM if SMRAM window is closed.
548 //
549 mSmmCoreLoadedImage->Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;
550 mSmmCoreLoadedImage->ParentHandle = gSmmCorePrivate->SmmIplImageHandle;
551 mSmmCoreLoadedImage->SystemTable = gST;
552
553 mSmmCoreLoadedImage->ImageBase = (VOID *)(UINTN)gSmmCorePrivate->PiSmmCoreImageBase;
554 mSmmCoreLoadedImage->ImageSize = gSmmCorePrivate->PiSmmCoreImageSize;
555 mSmmCoreLoadedImage->ImageCodeType = EfiRuntimeServicesCode;
556 mSmmCoreLoadedImage->ImageDataType = EfiRuntimeServicesData;
557
558 //
559 // Create a new image handle in the UEFI handle database for the SMM Driver
560 //
561 Handle = NULL;
562 Status = gBS->InstallMultipleProtocolInterfaces (
563 &Handle,
564 &gEfiLoadedImageProtocolGuid, mSmmCoreLoadedImage,
565 NULL
566 );
567 ASSERT_EFI_ERROR (Status);
568
569 //
570 // Allocate a Loaded Image Protocol in SMM
571 //
572 Status = SmmAllocatePool (EfiRuntimeServicesData, sizeof(EFI_SMM_DRIVER_ENTRY), (VOID **)&mSmmCoreDriverEntry);
573 ASSERT_EFI_ERROR(Status);
574
575 ZeroMem (mSmmCoreDriverEntry, sizeof(EFI_SMM_DRIVER_ENTRY));
576 //
577 // Fill in the remaining fields of the Loaded Image Protocol instance.
578 //
579 mSmmCoreDriverEntry->Signature = EFI_SMM_DRIVER_ENTRY_SIGNATURE;
580 mSmmCoreDriverEntry->SmmLoadedImage.Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;
581 mSmmCoreDriverEntry->SmmLoadedImage.ParentHandle = gSmmCorePrivate->SmmIplImageHandle;
582 mSmmCoreDriverEntry->SmmLoadedImage.SystemTable = gST;
583
584 mSmmCoreDriverEntry->SmmLoadedImage.ImageBase = (VOID *)(UINTN)gSmmCorePrivate->PiSmmCoreImageBase;
585 mSmmCoreDriverEntry->SmmLoadedImage.ImageSize = gSmmCorePrivate->PiSmmCoreImageSize;
586 mSmmCoreDriverEntry->SmmLoadedImage.ImageCodeType = EfiRuntimeServicesCode;
587 mSmmCoreDriverEntry->SmmLoadedImage.ImageDataType = EfiRuntimeServicesData;
588
589 mSmmCoreDriverEntry->ImageEntryPoint = gSmmCorePrivate->PiSmmCoreEntryPoint;
590 mSmmCoreDriverEntry->ImageBuffer = gSmmCorePrivate->PiSmmCoreImageBase;
591 mSmmCoreDriverEntry->NumberOfPage = EFI_SIZE_TO_PAGES((UINTN)gSmmCorePrivate->PiSmmCoreImageSize);
592
593 //
594 // Create a new image handle in the SMM handle database for the SMM Driver
595 //
596 mSmmCoreDriverEntry->SmmImageHandle = NULL;
597 Status = SmmInstallProtocolInterface (
598 &mSmmCoreDriverEntry->SmmImageHandle,
599 &gEfiLoadedImageProtocolGuid,
600 EFI_NATIVE_INTERFACE,
601 &mSmmCoreDriverEntry->SmmLoadedImage
602 );
603 ASSERT_EFI_ERROR(Status);
604
605 return ;
606 }
607
608 /**
609 The Entry Point for SMM Core
610
611 Install DXE Protocols and reload SMM Core into SMRAM and register SMM Core
612 EntryPoint on the SMI vector.
613
614 Note: This function is called for both DXE invocation and SMRAM invocation.
615
616 @param ImageHandle The firmware allocated handle for the EFI image.
617 @param SystemTable A pointer to the EFI System Table.
618
619 @retval EFI_SUCCESS The entry point is executed successfully.
620 @retval Other Some error occurred when executing this entry point.
621
622 **/
623 EFI_STATUS
624 EFIAPI
625 SmmMain (
626 IN EFI_HANDLE ImageHandle,
627 IN EFI_SYSTEM_TABLE *SystemTable
628 )
629 {
630 EFI_STATUS Status;
631 UINTN Index;
632
633 //
634 // Get SMM Core Private context passed in from SMM IPL in ImageHandle.
635 //
636 gSmmCorePrivate = (SMM_CORE_PRIVATE_DATA *)ImageHandle;
637
638 //
639 // Fill in SMRAM physical address for the SMM Services Table and the SMM Entry Point.
640 //
641 gSmmCorePrivate->Smst = &gSmmCoreSmst;
642 gSmmCorePrivate->SmmEntryPoint = SmmEntryPoint;
643
644 //
645 // No need to initialize memory service.
646 // It is done in constructor of PiSmmCoreMemoryAllocationLib(),
647 // so that the library linked with PiSmmCore can use AllocatePool() in constuctor.
648 //
649
650 SmramProfileInit ();
651
652 //
653 // Copy FullSmramRanges to SMRAM
654 //
655 mFullSmramRangeCount = gSmmCorePrivate->SmramRangeCount;
656 mFullSmramRanges = AllocatePool (mFullSmramRangeCount * sizeof (EFI_SMRAM_DESCRIPTOR));
657 ASSERT (mFullSmramRanges != NULL);
658 CopyMem (mFullSmramRanges, gSmmCorePrivate->SmramRanges, mFullSmramRangeCount * sizeof (EFI_SMRAM_DESCRIPTOR));
659
660 //
661 // Register all SMI Handlers required by the SMM Core
662 //
663 for (Index = 0; mSmmCoreSmiHandlers[Index].HandlerType != NULL; Index++) {
664 Status = SmiHandlerRegister (
665 mSmmCoreSmiHandlers[Index].Handler,
666 mSmmCoreSmiHandlers[Index].HandlerType,
667 &mSmmCoreSmiHandlers[Index].DispatchHandle
668 );
669 ASSERT_EFI_ERROR (Status);
670 }
671
672 RegisterSmramProfileHandler ();
673 SmramProfileInstallProtocol ();
674
675 SmmCoreInstallLoadedImage ();
676
677 SmmCoreInitializeMemoryAttributesTable ();
678
679 return EFI_SUCCESS;
680 }
EFI Development Kit II mirror for PVE