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e42e9404 | 1 | /** @file\r |
2 | SMM Core Main Entry Point\r | |
3 | \r | |
53ec4d7f | 4 | Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>\r |
e42e9404 | 5 | This program and the accompanying materials are licensed and made available \r |
6 | under the terms and conditions of the BSD License which accompanies this \r | |
7 | distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "PiSmmCore.h"\r | |
16 | \r | |
17 | //\r | |
18 | // Physical pointer to private structure shared between SMM IPL and the SMM Core\r | |
19 | //\r | |
20 | SMM_CORE_PRIVATE_DATA *gSmmCorePrivate;\r | |
21 | \r | |
22 | //\r | |
23 | // SMM Core global variable for SMM System Table. Only accessed as a physical structure in SMRAM.\r | |
24 | //\r | |
25 | EFI_SMM_SYSTEM_TABLE2 gSmmCoreSmst = {\r | |
26 | {\r | |
27 | SMM_SMST_SIGNATURE,\r | |
28 | EFI_SMM_SYSTEM_TABLE2_REVISION,\r | |
29 | sizeof (gSmmCoreSmst.Hdr)\r | |
30 | },\r | |
31 | NULL, // SmmFirmwareVendor\r | |
32 | 0, // SmmFirmwareRevision\r | |
33 | SmmInstallConfigurationTable,\r | |
34 | {\r | |
35 | {\r | |
36 | (EFI_SMM_CPU_IO2) SmmEfiNotAvailableYetArg5, // SmmMemRead\r | |
37 | (EFI_SMM_CPU_IO2) SmmEfiNotAvailableYetArg5 // SmmMemWrite\r | |
38 | },\r | |
39 | {\r | |
40 | (EFI_SMM_CPU_IO2) SmmEfiNotAvailableYetArg5, // SmmIoRead\r | |
41 | (EFI_SMM_CPU_IO2) SmmEfiNotAvailableYetArg5 // SmmIoWrite\r | |
42 | }\r | |
43 | },\r | |
44 | SmmAllocatePool,\r | |
45 | SmmFreePool,\r | |
46 | SmmAllocatePages,\r | |
47 | SmmFreePages,\r | |
48 | NULL, // SmmStartupThisAp\r | |
49 | 0, // CurrentlyExecutingCpu\r | |
50 | 0, // NumberOfCpus\r | |
51 | NULL, // CpuSaveStateSize\r | |
52 | NULL, // CpuSaveState\r | |
53 | 0, // NumberOfTableEntries\r | |
54 | NULL, // SmmConfigurationTable\r | |
55 | SmmInstallProtocolInterface,\r | |
56 | SmmUninstallProtocolInterface,\r | |
57 | SmmHandleProtocol,\r | |
58 | SmmRegisterProtocolNotify,\r | |
59 | SmmLocateHandle,\r | |
60 | SmmLocateProtocol,\r | |
61 | SmiManage,\r | |
62 | SmiHandlerRegister,\r | |
63 | SmiHandlerUnRegister\r | |
64 | };\r | |
65 | \r | |
66 | //\r | |
67 | // Flag to determine if the platform has performed a legacy boot.\r | |
68 | // If this flag is TRUE, then the runtime code and runtime data associated with the \r | |
53ec4d7f | 69 | // SMM IPL are converted to free memory, so the SMM Core must guarantee that is\r |
e42e9404 | 70 | // does not touch of the code/data associated with the SMM IPL if this flag is TRUE.\r |
71 | //\r | |
72 | BOOLEAN mInLegacyBoot = FALSE;\r | |
73 | \r | |
74 | //\r | |
75 | // Table of SMI Handlers that are registered by the SMM Core when it is initialized\r | |
76 | //\r | |
77 | SMM_CORE_SMI_HANDLERS mSmmCoreSmiHandlers[] = {\r | |
53ec4d7f SZ |
78 | { SmmDriverDispatchHandler, &gEfiEventDxeDispatchGuid, NULL, TRUE },\r |
79 | { SmmReadyToLockHandler, &gEfiDxeSmmReadyToLockProtocolGuid, NULL, TRUE }, \r | |
80 | { SmmLegacyBootHandler, &gEfiEventLegacyBootGuid, NULL, FALSE },\r | |
81 | { SmmExitBootServicesHandler, &gEfiEventExitBootServicesGuid, NULL, FALSE },\r | |
82 | { SmmReadyToBootHandler, &gEfiEventReadyToBootGuid, NULL, FALSE },\r | |
dc157845 | 83 | { SmmEndOfDxeHandler, &gEfiEndOfDxeEventGroupGuid, NULL, TRUE },\r |
53ec4d7f | 84 | { NULL, NULL, NULL, FALSE }\r |
e42e9404 | 85 | };\r |
86 | \r | |
84edd20b SZ |
87 | UINTN mFullSmramRangeCount;\r |
88 | EFI_SMRAM_DESCRIPTOR *mFullSmramRanges;\r | |
89 | \r | |
e42e9404 | 90 | /**\r |
91 | Place holder function until all the SMM System Table Service are available.\r | |
92 | \r | |
93 | Note: This function is only used by SMRAM invocation. It is never used by DXE invocation.\r | |
94 | \r | |
95 | @param Arg1 Undefined\r | |
96 | @param Arg2 Undefined\r | |
97 | @param Arg3 Undefined\r | |
98 | @param Arg4 Undefined\r | |
99 | @param Arg5 Undefined\r | |
100 | \r | |
101 | @return EFI_NOT_AVAILABLE_YET\r | |
102 | \r | |
103 | **/\r | |
104 | EFI_STATUS\r | |
105 | EFIAPI\r | |
106 | SmmEfiNotAvailableYetArg5 (\r | |
107 | UINTN Arg1,\r | |
108 | UINTN Arg2,\r | |
109 | UINTN Arg3,\r | |
110 | UINTN Arg4,\r | |
111 | UINTN Arg5\r | |
112 | )\r | |
113 | {\r | |
114 | //\r | |
115 | // This function should never be executed. If it does, then the architectural protocols\r | |
116 | // have not been designed correctly.\r | |
117 | //\r | |
118 | return EFI_NOT_AVAILABLE_YET;\r | |
119 | }\r | |
120 | \r | |
121 | /**\r | |
122 | Software SMI handler that is called when a Legacy Boot event is signalled. The SMM\r | |
123 | Core uses this signal to know that a Legacy Boot has been performed and that \r | |
124 | gSmmCorePrivate that is shared between the UEFI and SMM execution environments can\r | |
125 | not be accessed from SMM anymore since that structure is considered free memory by\r | |
53ec4d7f SZ |
126 | a legacy OS. Then the SMM Core also install SMM Legacy Boot protocol to notify SMM\r |
127 | driver that system enter legacy boot.\r | |
e42e9404 | 128 | \r |
129 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
130 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
131 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
132 | be conveyed from a non-SMM environment into an SMM environment.\r | |
133 | @param CommBufferSize The size of the CommBuffer.\r | |
134 | \r | |
135 | @return Status Code\r | |
136 | \r | |
137 | **/\r | |
138 | EFI_STATUS\r | |
139 | EFIAPI\r | |
140 | SmmLegacyBootHandler (\r | |
141 | IN EFI_HANDLE DispatchHandle,\r | |
142 | IN CONST VOID *Context, OPTIONAL\r | |
143 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
144 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
145 | )\r | |
146 | {\r | |
53ec4d7f SZ |
147 | EFI_STATUS Status;\r |
148 | EFI_HANDLE SmmHandle;\r | |
149 | \r | |
150 | //\r | |
151 | // Install SMM Legacy Boot protocol.\r | |
152 | //\r | |
153 | SmmHandle = NULL;\r | |
154 | Status = SmmInstallProtocolInterface (\r | |
155 | &SmmHandle,\r | |
156 | &gEdkiiSmmLegacyBootProtocolGuid,\r | |
157 | EFI_NATIVE_INTERFACE,\r | |
158 | NULL\r | |
159 | );\r | |
160 | \r | |
e42e9404 | 161 | mInLegacyBoot = TRUE;\r |
53ec4d7f SZ |
162 | \r |
163 | SmiHandlerUnRegister (DispatchHandle);\r | |
164 | \r | |
165 | return Status;\r | |
166 | }\r | |
167 | \r | |
168 | /**\r | |
169 | Software SMI handler that is called when an Exit Boot Services event is signalled.\r | |
170 | Then the SMM Core also install SMM Exit Boot Services protocol to notify SMM driver\r | |
171 | that system enter exit boot services.\r | |
172 | \r | |
173 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
174 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
175 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
176 | be conveyed from a non-SMM environment into an SMM environment.\r | |
177 | @param CommBufferSize The size of the CommBuffer.\r | |
178 | \r | |
179 | @return Status Code\r | |
180 | \r | |
181 | **/\r | |
182 | EFI_STATUS\r | |
183 | EFIAPI\r | |
184 | SmmExitBootServicesHandler (\r | |
185 | IN EFI_HANDLE DispatchHandle,\r | |
186 | IN CONST VOID *Context, OPTIONAL\r | |
187 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
188 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
189 | )\r | |
190 | {\r | |
191 | EFI_STATUS Status;\r | |
192 | EFI_HANDLE SmmHandle;\r | |
193 | \r | |
194 | //\r | |
195 | // Install SMM Exit Boot Services protocol.\r | |
196 | //\r | |
197 | SmmHandle = NULL;\r | |
198 | Status = SmmInstallProtocolInterface (\r | |
199 | &SmmHandle,\r | |
200 | &gEdkiiSmmExitBootServicesProtocolGuid,\r | |
201 | EFI_NATIVE_INTERFACE,\r | |
202 | NULL\r | |
203 | );\r | |
204 | \r | |
205 | SmiHandlerUnRegister (DispatchHandle);\r | |
206 | \r | |
207 | return Status;\r | |
208 | }\r | |
209 | \r | |
210 | /**\r | |
211 | Software SMI handler that is called when an Ready To Boot event is signalled.\r | |
212 | Then the SMM Core also install SMM Ready To Boot protocol to notify SMM driver\r | |
213 | that system enter ready to boot.\r | |
214 | \r | |
215 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
216 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
217 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
218 | be conveyed from a non-SMM environment into an SMM environment.\r | |
219 | @param CommBufferSize The size of the CommBuffer.\r | |
220 | \r | |
221 | @return Status Code\r | |
222 | \r | |
223 | **/\r | |
224 | EFI_STATUS\r | |
225 | EFIAPI\r | |
226 | SmmReadyToBootHandler (\r | |
227 | IN EFI_HANDLE DispatchHandle,\r | |
228 | IN CONST VOID *Context, OPTIONAL\r | |
229 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
230 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
231 | )\r | |
232 | {\r | |
233 | EFI_STATUS Status;\r | |
234 | EFI_HANDLE SmmHandle;\r | |
235 | \r | |
236 | //\r | |
237 | // Install SMM Ready To Boot protocol.\r | |
238 | //\r | |
239 | SmmHandle = NULL;\r | |
240 | Status = SmmInstallProtocolInterface (\r | |
241 | &SmmHandle,\r | |
242 | &gEdkiiSmmReadyToBootProtocolGuid,\r | |
243 | EFI_NATIVE_INTERFACE,\r | |
244 | NULL\r | |
245 | );\r | |
246 | \r | |
247 | SmiHandlerUnRegister (DispatchHandle);\r | |
248 | \r | |
249 | return Status;\r | |
e42e9404 | 250 | }\r |
251 | \r | |
252 | /**\r | |
253 | Software SMI handler that is called when the DxeSmmReadyToLock protocol is added\r | |
254 | or if gEfiEventReadyToBootGuid is signalled. This function unregisters the \r | |
255 | Software SMIs that are nor required after SMRAM is locked and installs the \r | |
256 | SMM Ready To Lock Protocol so SMM Drivers are informed that SMRAM is about \r | |
257 | to be locked. It also verifies the the SMM CPU I/O 2 Protocol has been installed\r | |
258 | and NULLs gBS and gST because they can not longer be used after SMRAM is locked.\r | |
259 | \r | |
260 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
261 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
262 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
263 | be conveyed from a non-SMM environment into an SMM environment.\r | |
264 | @param CommBufferSize The size of the CommBuffer.\r | |
265 | \r | |
266 | @return Status Code\r | |
267 | \r | |
268 | **/\r | |
269 | EFI_STATUS\r | |
270 | EFIAPI\r | |
271 | SmmReadyToLockHandler (\r | |
272 | IN EFI_HANDLE DispatchHandle,\r | |
273 | IN CONST VOID *Context, OPTIONAL\r | |
274 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
275 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
276 | )\r | |
277 | {\r | |
278 | EFI_STATUS Status;\r | |
279 | UINTN Index;\r | |
280 | EFI_HANDLE SmmHandle;\r | |
281 | VOID *Interface;\r | |
282 | \r | |
283 | //\r | |
284 | // Unregister SMI Handlers that are no required after the SMM driver dispatch is stopped\r | |
285 | //\r | |
286 | for (Index = 0; mSmmCoreSmiHandlers[Index].HandlerType != NULL; Index++) {\r | |
287 | if (mSmmCoreSmiHandlers[Index].UnRegister) {\r | |
288 | SmiHandlerUnRegister (mSmmCoreSmiHandlers[Index].DispatchHandle);\r | |
289 | }\r | |
290 | }\r | |
291 | \r | |
292 | //\r | |
293 | // Install SMM Ready to lock protocol\r | |
294 | //\r | |
295 | SmmHandle = NULL;\r | |
296 | Status = SmmInstallProtocolInterface (\r | |
297 | &SmmHandle,\r | |
298 | &gEfiSmmReadyToLockProtocolGuid,\r | |
299 | EFI_NATIVE_INTERFACE,\r | |
300 | NULL\r | |
301 | );\r | |
302 | \r | |
303 | //\r | |
304 | // Make sure SMM CPU I/O 2 Procol has been installed into the handle database\r | |
305 | //\r | |
306 | Status = SmmLocateProtocol (&gEfiSmmCpuIo2ProtocolGuid, NULL, &Interface);\r | |
307 | \r | |
308 | //\r | |
309 | // Print a message on a debug build if the SMM CPU I/O 2 Protocol is not installed\r | |
310 | //\r | |
311 | DEBUG_CODE_BEGIN ();\r | |
312 | if (EFI_ERROR (Status)) {\r | |
313 | DEBUG ((DEBUG_ERROR, "\nSMM: SmmCpuIo Arch Protocol not present!!\n"));\r | |
314 | }\r | |
315 | DEBUG_CODE_END ();\r | |
316 | \r | |
317 | //\r | |
318 | // Assert if the CPU I/O 2 Protocol is not installed\r | |
319 | //\r | |
320 | ASSERT_EFI_ERROR (Status);\r | |
321 | \r | |
322 | //\r | |
323 | // Display any drivers that were not dispatched because dependency expression\r | |
324 | // evaluated to false if this is a debug build\r | |
325 | //\r | |
326 | DEBUG_CODE_BEGIN ();\r | |
327 | SmmDisplayDiscoveredNotDispatched ();\r | |
328 | DEBUG_CODE_END ();\r | |
329 | \r | |
330 | //\r | |
331 | // Not allowed to use gST or gBS after lock\r | |
332 | //\r | |
333 | gST = NULL;\r | |
334 | gBS = NULL;\r | |
335 | \r | |
84edd20b SZ |
336 | SmramProfileReadyToLock ();\r |
337 | \r | |
e42e9404 | 338 | return Status;\r |
339 | }\r | |
340 | \r | |
46ece1ff JY |
341 | /**\r |
342 | Software SMI handler that is called when the EndOfDxe event is signalled.\r | |
343 | This function installs the SMM EndOfDxe Protocol so SMM Drivers are informed that\r | |
344 | platform code will invoke 3rd part code.\r | |
345 | \r | |
346 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
347 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
348 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
349 | be conveyed from a non-SMM environment into an SMM environment.\r | |
350 | @param CommBufferSize The size of the CommBuffer.\r | |
351 | \r | |
352 | @return Status Code\r | |
353 | \r | |
354 | **/\r | |
355 | EFI_STATUS\r | |
356 | EFIAPI\r | |
357 | SmmEndOfDxeHandler (\r | |
358 | IN EFI_HANDLE DispatchHandle,\r | |
359 | IN CONST VOID *Context, OPTIONAL\r | |
360 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
361 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
362 | )\r | |
363 | {\r | |
364 | EFI_STATUS Status;\r | |
365 | EFI_HANDLE SmmHandle;\r | |
366 | \r | |
367 | DEBUG ((EFI_D_INFO, "SmmEndOfDxeHandler\n"));\r | |
368 | //\r | |
369 | // Install SMM EndOfDxe protocol\r | |
370 | //\r | |
371 | SmmHandle = NULL;\r | |
372 | Status = SmmInstallProtocolInterface (\r | |
373 | &SmmHandle,\r | |
374 | &gEfiSmmEndOfDxeProtocolGuid,\r | |
375 | EFI_NATIVE_INTERFACE,\r | |
376 | NULL\r | |
377 | );\r | |
42e2ff2e | 378 | return Status;\r |
46ece1ff JY |
379 | }\r |
380 | \r | |
e42e9404 | 381 | /**\r |
382 | The main entry point to SMM Foundation.\r | |
383 | \r | |
384 | Note: This function is only used by SMRAM invocation. It is never used by DXE invocation.\r | |
385 | \r | |
386 | @param SmmEntryContext Processor information and functionality\r | |
387 | needed by SMM Foundation.\r | |
388 | \r | |
389 | **/\r | |
390 | VOID\r | |
391 | EFIAPI\r | |
392 | SmmEntryPoint (\r | |
393 | IN CONST EFI_SMM_ENTRY_CONTEXT *SmmEntryContext\r | |
394 | )\r | |
395 | {\r | |
396 | EFI_STATUS Status;\r | |
397 | EFI_SMM_COMMUNICATE_HEADER *CommunicateHeader;\r | |
a25cb9f6 | 398 | BOOLEAN InLegacyBoot;\r |
e42e9404 | 399 | \r |
495797c5 | 400 | PERF_START (NULL, "SMM", NULL, 0) ;\r |
401 | \r | |
e42e9404 | 402 | //\r |
403 | // Update SMST using the context\r | |
404 | //\r | |
405 | CopyMem (&gSmmCoreSmst.SmmStartupThisAp, SmmEntryContext, sizeof (EFI_SMM_ENTRY_CONTEXT));\r | |
406 | \r | |
495797c5 | 407 | //\r |
408 | // Call platform hook before Smm Dispatch\r | |
409 | //\r | |
410 | PlatformHookBeforeSmmDispatch ();\r | |
411 | \r | |
e42e9404 | 412 | //\r |
413 | // If a legacy boot has occured, then make sure gSmmCorePrivate is not accessed\r | |
414 | //\r | |
a25cb9f6 | 415 | InLegacyBoot = mInLegacyBoot;\r |
416 | if (!InLegacyBoot) {\r | |
e42e9404 | 417 | //\r |
9fa90bb4 | 418 | // Mark the InSmm flag as TRUE, it will be used by SmmBase2 protocol\r |
e42e9404 | 419 | //\r |
9fa90bb4 | 420 | gSmmCorePrivate->InSmm = TRUE;\r |
e42e9404 | 421 | \r |
422 | //\r | |
9fa90bb4 | 423 | // Check to see if this is a Synchronous SMI sent through the SMM Communication \r |
424 | // Protocol or an Asynchronous SMI\r | |
e42e9404 | 425 | //\r |
9fa90bb4 | 426 | if (gSmmCorePrivate->CommunicationBuffer != NULL) {\r |
427 | //\r | |
428 | // Synchronous SMI for SMM Core or request from Communicate protocol\r | |
429 | //\r | |
842b1242 | 430 | if (!SmmIsBufferOutsideSmmValid ((UINTN)gSmmCorePrivate->CommunicationBuffer, gSmmCorePrivate->BufferSize)) {\r |
3720ee6d JF |
431 | //\r |
432 | // If CommunicationBuffer is not in valid address scope, return EFI_INVALID_PARAMETER\r | |
433 | //\r | |
434 | gSmmCorePrivate->CommunicationBuffer = NULL;\r | |
435 | gSmmCorePrivate->ReturnStatus = EFI_INVALID_PARAMETER;\r | |
436 | } else {\r | |
437 | CommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *)gSmmCorePrivate->CommunicationBuffer;\r | |
438 | gSmmCorePrivate->BufferSize -= OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data);\r | |
439 | Status = SmiManage (\r | |
440 | &CommunicateHeader->HeaderGuid, \r | |
441 | NULL, \r | |
442 | CommunicateHeader->Data, \r | |
443 | &gSmmCorePrivate->BufferSize\r | |
444 | );\r | |
445 | //\r | |
446 | // Update CommunicationBuffer, BufferSize and ReturnStatus\r | |
447 | // Communicate service finished, reset the pointer to CommBuffer to NULL\r | |
448 | //\r | |
449 | gSmmCorePrivate->BufferSize += OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data);\r | |
450 | gSmmCorePrivate->CommunicationBuffer = NULL;\r | |
451 | gSmmCorePrivate->ReturnStatus = (Status == EFI_SUCCESS) ? EFI_SUCCESS : EFI_NOT_FOUND;\r | |
452 | }\r | |
9fa90bb4 | 453 | }\r |
e42e9404 | 454 | }\r |
9fa90bb4 | 455 | \r |
456 | //\r | |
457 | // Process Asynchronous SMI sources\r | |
458 | //\r | |
459 | SmiManage (NULL, NULL, NULL, NULL);\r | |
495797c5 | 460 | \r |
461 | //\r | |
462 | // Call platform hook after Smm Dispatch\r | |
463 | //\r | |
464 | PlatformHookAfterSmmDispatch ();\r | |
e42e9404 | 465 | \r |
466 | //\r | |
9fa90bb4 | 467 | // If a legacy boot has occured, then make sure gSmmCorePrivate is not accessed\r |
e42e9404 | 468 | //\r |
a25cb9f6 | 469 | if (!InLegacyBoot) {\r |
9fa90bb4 | 470 | //\r |
471 | // Clear the InSmm flag as we are going to leave SMM\r | |
472 | //\r | |
473 | gSmmCorePrivate->InSmm = FALSE;\r | |
474 | }\r | |
495797c5 | 475 | \r |
476 | PERF_END (NULL, "SMM", NULL, 0) ;\r | |
e42e9404 | 477 | }\r |
478 | \r | |
479 | /**\r | |
480 | The Entry Point for SMM Core\r | |
481 | \r | |
482 | Install DXE Protocols and reload SMM Core into SMRAM and register SMM Core \r | |
483 | EntryPoint on the SMI vector.\r | |
484 | \r | |
485 | Note: This function is called for both DXE invocation and SMRAM invocation.\r | |
486 | \r | |
487 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
488 | @param SystemTable A pointer to the EFI System Table.\r | |
489 | \r | |
490 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
491 | @retval Other Some error occurred when executing this entry point.\r | |
492 | \r | |
493 | **/\r | |
494 | EFI_STATUS\r | |
495 | EFIAPI\r | |
496 | SmmMain (\r | |
497 | IN EFI_HANDLE ImageHandle,\r | |
498 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
499 | )\r | |
500 | {\r | |
501 | EFI_STATUS Status;\r | |
502 | UINTN Index;\r | |
503 | \r | |
504 | //\r | |
505 | // Get SMM Core Private context passed in from SMM IPL in ImageHandle.\r | |
506 | //\r | |
507 | gSmmCorePrivate = (SMM_CORE_PRIVATE_DATA *)ImageHandle;\r | |
508 | \r | |
509 | //\r | |
510 | // Fill in SMRAM physical address for the SMM Services Table and the SMM Entry Point.\r | |
511 | //\r | |
512 | gSmmCorePrivate->Smst = &gSmmCoreSmst;\r | |
513 | gSmmCorePrivate->SmmEntryPoint = SmmEntryPoint;\r | |
514 | \r | |
515 | //\r | |
842b1242 JY |
516 | // No need to initialize memory service.\r |
517 | // It is done in constructor of PiSmmCoreMemoryAllocationLib(),\r | |
518 | // so that the library linked with PiSmmCore can use AllocatePool() in constuctor.\r | |
e42e9404 | 519 | //\r |
e42e9404 | 520 | \r |
84edd20b SZ |
521 | SmramProfileInit ();\r |
522 | \r | |
523 | //\r | |
524 | // Copy FullSmramRanges to SMRAM\r | |
525 | //\r | |
c03beb76 | 526 | mFullSmramRangeCount = gSmmCorePrivate->SmramRangeCount;\r |
84edd20b SZ |
527 | mFullSmramRanges = AllocatePool (mFullSmramRangeCount * sizeof (EFI_SMRAM_DESCRIPTOR));\r |
528 | ASSERT (mFullSmramRanges != NULL);\r | |
c03beb76 | 529 | CopyMem (mFullSmramRanges, gSmmCorePrivate->SmramRanges, mFullSmramRangeCount * sizeof (EFI_SMRAM_DESCRIPTOR));\r |
84edd20b | 530 | \r |
e42e9404 | 531 | //\r |
532 | // Register all SMI Handlers required by the SMM Core\r | |
533 | //\r | |
534 | for (Index = 0; mSmmCoreSmiHandlers[Index].HandlerType != NULL; Index++) {\r | |
535 | Status = SmiHandlerRegister (\r | |
536 | mSmmCoreSmiHandlers[Index].Handler,\r | |
537 | mSmmCoreSmiHandlers[Index].HandlerType,\r | |
538 | &mSmmCoreSmiHandlers[Index].DispatchHandle\r | |
539 | );\r | |
540 | ASSERT_EFI_ERROR (Status);\r | |
541 | }\r | |
84edd20b SZ |
542 | \r |
543 | RegisterSmramProfileHandler ();\r | |
544 | \r | |
e42e9404 | 545 | return EFI_SUCCESS;\r |
546 | }\r |