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1 | /** @file\r |
2 | \r | |
3 | This file contains the implementation for a Platform Runtime Mechanism (PRM) configuration driver.\r | |
4 | \r | |
5 | Copyright (c) Microsoft Corporation\r | |
6 | Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>\r | |
7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
8 | \r | |
9 | **/\r | |
10 | \r | |
11 | #include <Library/BaseLib.h>\r | |
12 | #include <Library/BaseMemoryLib.h>\r | |
13 | #include <Library/DebugLib.h>\r | |
14 | #include <Library/DxeServicesTableLib.h>\r | |
15 | #include <Library/MemoryAllocationLib.h>\r | |
16 | #include <Library/UefiBootServicesTableLib.h>\r | |
17 | #include <Library/UefiRuntimeServicesTableLib.h>\r | |
18 | #include <Library/UefiLib.h>\r | |
19 | \r | |
20 | #include <PiDxe.h>\r | |
21 | #include <PrmContextBuffer.h>\r | |
22 | #include <PrmDataBuffer.h>\r | |
23 | #include <PrmMmio.h>\r | |
24 | #include <Protocol/PrmConfig.h>\r | |
25 | \r | |
26 | #define _DBGMSGID_ "[PRMCONFIG]"\r | |
27 | \r | |
28 | STATIC UINTN mMaxRuntimeMmioRangeCount;\r | |
3f7af17c | 29 | \r |
e8467976 | 30 | GLOBAL_REMOVE_IF_UNREFERENCED STATIC PRM_RUNTIME_MMIO_RANGES **mRuntimeMmioRanges;\r |
3f7af17c MK |
31 | \r |
32 | /**\r | |
33 | Converts the runtime memory range physical addresses to virtual addresses.\r | |
34 | \r | |
35 | @param[in] RuntimeMmioRanges A pointer to a PRM_RUNTIME_MMIO_RANGES buffer.\r | |
36 | \r | |
37 | **/\r | |
38 | VOID\r | |
39 | ConvertRuntimeMemoryRangeAddresses (\r | |
40 | IN PRM_RUNTIME_MMIO_RANGES *RuntimeMmioRanges\r | |
41 | )\r | |
42 | {\r | |
43 | UINTN Index;\r | |
44 | \r | |
45 | if (RuntimeMmioRanges == NULL || RuntimeMmioRanges->Count == 0) {\r | |
46 | return;\r | |
47 | }\r | |
48 | \r | |
49 | for (Index = 0; Index < (UINTN) RuntimeMmioRanges->Count; Index++) {\r | |
50 | RuntimeMmioRanges->Range[Index].VirtualBaseAddress = RuntimeMmioRanges->Range[Index].PhysicalBaseAddress;\r | |
51 | gRT->ConvertPointer (0x0, (VOID **) &(RuntimeMmioRanges->Range[Index].VirtualBaseAddress));\r | |
52 | }\r | |
53 | }\r | |
54 | \r | |
55 | /**\r | |
56 | Sets the runtime memory range attributes.\r | |
57 | \r | |
58 | The EFI_MEMORY_RUNTIME attribute is set for each PRM_RUNTIME_MMIO_RANGE present\r | |
59 | in the buffer provided.\r | |
60 | \r | |
61 | @param[in] RuntimeMmioRanges A pointer to a PRM_RUNTIME_MMIO_RANGES buffer.\r | |
62 | \r | |
63 | **/\r | |
64 | VOID\r | |
65 | SetRuntimeMemoryRangeAttributes (\r | |
66 | IN PRM_RUNTIME_MMIO_RANGES *RuntimeMmioRanges\r | |
67 | )\r | |
68 | {\r | |
69 | EFI_STATUS Status;\r | |
70 | EFI_STATUS Status2;\r | |
71 | UINTN Index;\r | |
72 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;\r | |
73 | \r | |
74 | DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));\r | |
75 | \r | |
76 | if (RuntimeMmioRanges == NULL || RuntimeMmioRanges->Count == 0) {\r | |
77 | return;\r | |
78 | }\r | |
79 | \r | |
80 | for (Index = 0; Index < (UINTN) RuntimeMmioRanges->Count; Index++) {\r | |
81 | DEBUG ((\r | |
82 | DEBUG_INFO, " %a %a: Runtime MMIO Range [%d].\n", _DBGMSGID_, __FUNCTION__, Index));\r | |
83 | DEBUG ((\r | |
84 | DEBUG_INFO,\r | |
85 | " %a %a: Physical address = 0x%016x. Length = 0x%x.\n",\r | |
86 | _DBGMSGID_,\r | |
87 | __FUNCTION__,\r | |
88 | RuntimeMmioRanges->Range[Index].PhysicalBaseAddress,\r | |
89 | RuntimeMmioRanges->Range[Index].Length\r | |
90 | ));\r | |
91 | \r | |
92 | // Runtime memory ranges should cover ranges on a page boundary\r | |
93 | ASSERT ((RuntimeMmioRanges->Range[Index].PhysicalBaseAddress & EFI_PAGE_MASK) == 0);\r | |
94 | ASSERT ((RuntimeMmioRanges->Range[Index].Length & EFI_PAGE_MASK) == 0);\r | |
95 | \r | |
96 | Status2 = EFI_NOT_FOUND;\r | |
97 | Status = gDS->GetMemorySpaceDescriptor (RuntimeMmioRanges->Range[Index].PhysicalBaseAddress, &Descriptor);\r | |
98 | if (!EFI_ERROR (Status) &&\r | |
99 | (\r | |
100 | (Descriptor.GcdMemoryType != EfiGcdMemoryTypeMemoryMappedIo && Descriptor.GcdMemoryType != EfiGcdMemoryTypeReserved) ||\r | |
101 | ((Descriptor.Length & EFI_PAGE_MASK) != 0)\r | |
102 | )\r | |
103 | ) {\r | |
104 | Status2 = gDS->RemoveMemorySpace (\r | |
105 | RuntimeMmioRanges->Range[Index].PhysicalBaseAddress,\r | |
106 | Descriptor.Length\r | |
107 | );\r | |
108 | }\r | |
109 | \r | |
110 | if (Status == EFI_NOT_FOUND || !EFI_ERROR (Status2)) {\r | |
111 | Status = gDS->AddMemorySpace (\r | |
112 | EfiGcdMemoryTypeMemoryMappedIo,\r | |
113 | RuntimeMmioRanges->Range[Index].PhysicalBaseAddress,\r | |
114 | (UINT64) RuntimeMmioRanges->Range[Index].Length,\r | |
115 | EFI_MEMORY_UC | EFI_MEMORY_RUNTIME\r | |
116 | );\r | |
117 | ASSERT_EFI_ERROR (Status);\r | |
118 | \r | |
119 | Status = gDS->AllocateMemorySpace (\r | |
120 | EfiGcdAllocateAddress,\r | |
121 | EfiGcdMemoryTypeMemoryMappedIo,\r | |
122 | 0,\r | |
123 | (UINT64) RuntimeMmioRanges->Range[Index].Length,\r | |
124 | &RuntimeMmioRanges->Range[Index].PhysicalBaseAddress,\r | |
125 | gImageHandle,\r | |
126 | NULL\r | |
127 | );\r | |
128 | ASSERT_EFI_ERROR (Status);\r | |
129 | }\r | |
130 | \r | |
131 | Status = gDS->GetMemorySpaceDescriptor (RuntimeMmioRanges->Range[Index].PhysicalBaseAddress, &Descriptor);\r | |
132 | ASSERT_EFI_ERROR (Status);\r | |
133 | if (EFI_ERROR (Status)) {\r | |
134 | DEBUG ((\r | |
135 | DEBUG_ERROR,\r | |
136 | " %a %a: Error [%r] finding descriptor for runtime memory range 0x%016x.\n",\r | |
137 | _DBGMSGID_,\r | |
138 | __FUNCTION__,\r | |
139 | Status,\r | |
140 | RuntimeMmioRanges->Range[Index].PhysicalBaseAddress\r | |
141 | ));\r | |
142 | continue;\r | |
143 | }\r | |
144 | if ((Descriptor.Attributes & EFI_MEMORY_RUNTIME) != 0) {\r | |
145 | continue;\r | |
146 | }\r | |
147 | \r | |
148 | Status = gDS->SetMemorySpaceAttributes (\r | |
149 | RuntimeMmioRanges->Range[Index].PhysicalBaseAddress,\r | |
150 | (UINT64) RuntimeMmioRanges->Range[Index].Length,\r | |
151 | Descriptor.Attributes | EFI_MEMORY_RUNTIME\r | |
152 | );\r | |
153 | ASSERT_EFI_ERROR (Status);\r | |
154 | if (EFI_ERROR (Status)) {\r | |
155 | DEBUG ((\r | |
156 | DEBUG_ERROR,\r | |
157 | " %a %a: Error [%r] setting descriptor for runtime memory range 0x%016x.\n",\r | |
158 | _DBGMSGID_,\r | |
159 | __FUNCTION__,\r | |
160 | Status,\r | |
161 | RuntimeMmioRanges->Range[Index].PhysicalBaseAddress\r | |
162 | ));\r | |
163 | } else {\r | |
164 | DEBUG ((DEBUG_INFO, " %a %a: Successfully set runtime attribute for the MMIO range.\n", _DBGMSGID_, __FUNCTION__));\r | |
165 | }\r | |
166 | }\r | |
167 | }\r | |
168 | \r | |
169 | /**\r | |
170 | Stores pointers or pointer to resources that should be converted in the virtual address change event.\r | |
171 | \r | |
172 | **/\r | |
173 | VOID\r | |
174 | StoreVirtualMemoryAddressChangePointers (\r | |
175 | VOID\r | |
176 | )\r | |
177 | {\r | |
178 | EFI_STATUS Status;\r | |
3f7af17c MK |
179 | UINTN HandleCount;\r |
180 | UINTN HandleIndex;\r | |
181 | UINTN RangeIndex;\r | |
3f7af17c MK |
182 | EFI_HANDLE *HandleBuffer;\r |
183 | PRM_CONFIG_PROTOCOL *PrmConfigProtocol;\r | |
3f7af17c MK |
184 | \r |
185 | DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));\r | |
186 | \r | |
187 | RangeIndex = 0;\r | |
3f7af17c | 188 | \r |
e8467976 MK |
189 | mRuntimeMmioRanges = AllocateRuntimeZeroPool (sizeof (*mRuntimeMmioRanges) * mMaxRuntimeMmioRangeCount);\r |
190 | if (mRuntimeMmioRanges == NULL && mMaxRuntimeMmioRangeCount > 0) {\r | |
3f7af17c MK |
191 | DEBUG ((\r |
192 | DEBUG_ERROR,\r | |
e8467976 | 193 | " %a %a: Memory allocation for runtime MMIO pointer array failed.\n",\r |
3f7af17c MK |
194 | _DBGMSGID_,\r |
195 | __FUNCTION__\r | |
196 | ));\r | |
197 | ASSERT (FALSE);\r | |
198 | return;\r | |
199 | }\r | |
200 | \r | |
201 | HandleBuffer = NULL;\r | |
202 | Status = gBS->LocateHandleBuffer (\r | |
203 | ByProtocol,\r | |
204 | &gPrmConfigProtocolGuid,\r | |
205 | NULL,\r | |
206 | &HandleCount,\r | |
207 | &HandleBuffer\r | |
208 | );\r | |
209 | if (!EFI_ERROR (Status)) {\r | |
210 | for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {\r | |
211 | Status = gBS->HandleProtocol (\r | |
212 | HandleBuffer[HandleIndex],\r | |
213 | &gPrmConfigProtocolGuid,\r | |
214 | (VOID **) &PrmConfigProtocol\r | |
215 | );\r | |
216 | ASSERT_EFI_ERROR (Status);\r | |
217 | if (EFI_ERROR (Status) || PrmConfigProtocol == NULL) {\r | |
218 | continue;\r | |
219 | }\r | |
220 | \r | |
3f7af17c MK |
221 | if (PrmConfigProtocol->ModuleContextBuffers.RuntimeMmioRanges != NULL) {\r |
222 | if (RangeIndex >= mMaxRuntimeMmioRangeCount) {\r | |
223 | Status = EFI_BUFFER_TOO_SMALL;\r | |
224 | DEBUG ((\r | |
225 | DEBUG_ERROR,\r | |
226 | " %a %a: Index out of bounds - Actual count (%d) of runtime MMIO ranges exceeds maximum count (%d).\n",\r | |
227 | _DBGMSGID_,\r | |
228 | __FUNCTION__,\r | |
229 | RangeIndex + 1,\r | |
230 | mMaxRuntimeMmioRangeCount\r | |
231 | ));\r | |
232 | ASSERT_EFI_ERROR (Status);\r | |
233 | return;\r | |
234 | }\r | |
235 | mRuntimeMmioRanges[RangeIndex++] = PrmConfigProtocol->ModuleContextBuffers.RuntimeMmioRanges;\r | |
236 | }\r | |
237 | }\r | |
238 | DEBUG ((\r | |
239 | DEBUG_INFO,\r | |
240 | " %a %a: %d MMIO ranges buffers saved for future virtual memory conversion.\n",\r | |
241 | _DBGMSGID_,\r | |
242 | __FUNCTION__,\r | |
243 | RangeIndex\r | |
244 | ));\r | |
3f7af17c MK |
245 | }\r |
246 | }\r | |
247 | \r | |
248 | /**\r | |
249 | Validates a data buffer for a PRM module.\r | |
250 | \r | |
251 | Verifies the buffer header signature is valid and the length meets the minimum size.\r | |
252 | \r | |
253 | @param[in] PrmDataBuffer A pointer to the data buffer for this PRM module.\r | |
254 | \r | |
255 | @retval EFI_SUCCESS The data buffer was validated successfully.\r | |
256 | @retval EFI_INVALID_PARAMETER The pointer given for PrmDataBuffer is NULL.\r | |
257 | @retval EFI_NOT_FOUND The data buffer signature is not valid.\r | |
258 | @retval EFI_BUFFER_TOO_SMALL The buffer size is too small.\r | |
259 | \r | |
260 | **/\r | |
261 | EFI_STATUS\r | |
262 | ValidatePrmDataBuffer (\r | |
263 | IN CONST PRM_DATA_BUFFER *PrmDataBuffer\r | |
264 | )\r | |
265 | {\r | |
266 | if (PrmDataBuffer == NULL) {\r | |
267 | return EFI_INVALID_PARAMETER;\r | |
268 | }\r | |
269 | \r | |
270 | if (PrmDataBuffer->Header.Signature != PRM_DATA_BUFFER_HEADER_SIGNATURE) {\r | |
271 | DEBUG ((DEBUG_ERROR, " %a %a: The PRM data buffer signature is invalid. PRM module.\n", _DBGMSGID_, __FUNCTION__));\r | |
272 | return EFI_NOT_FOUND;\r | |
273 | }\r | |
274 | if (PrmDataBuffer->Header.Length < sizeof (PRM_DATA_BUFFER_HEADER)) {\r | |
275 | DEBUG ((DEBUG_ERROR, " %a %a: The PRM data buffer length is invalid.\n", _DBGMSGID_, __FUNCTION__));\r | |
276 | return EFI_BUFFER_TOO_SMALL;\r | |
277 | }\r | |
278 | \r | |
279 | return EFI_SUCCESS;\r | |
280 | }\r | |
281 | \r | |
282 | /**\r | |
283 | Validates a PRM context buffer.\r | |
284 | \r | |
285 | Verifies the buffer header signature is valid and the GUID is set to a non-zero value.\r | |
286 | \r | |
287 | @param[in] PrmContextBuffer A pointer to the context buffer for this PRM handler.\r | |
288 | \r | |
289 | @retval EFI_SUCCESS The context buffer was validated successfully.\r | |
290 | @retval EFI_INVALID_PARAMETER The pointer given for ContextBuffer is NULL.\r | |
291 | @retval EFI_NOT_FOUND The proper value for a field was not found.\r | |
292 | \r | |
293 | **/\r | |
294 | EFI_STATUS\r | |
295 | ValidatePrmContextBuffer (\r | |
296 | IN CONST PRM_CONTEXT_BUFFER *PrmContextBuffer\r | |
297 | )\r | |
298 | {\r | |
299 | if (PrmContextBuffer == NULL) {\r | |
300 | return EFI_INVALID_PARAMETER;\r | |
301 | }\r | |
302 | \r | |
303 | if (PrmContextBuffer->Signature != PRM_CONTEXT_BUFFER_SIGNATURE) {\r | |
304 | DEBUG ((DEBUG_ERROR, " %a %a: The PRM context buffer signature is invalid.\n", _DBGMSGID_, __FUNCTION__));\r | |
305 | return EFI_NOT_FOUND;\r | |
306 | }\r | |
307 | \r | |
308 | if (IsZeroGuid (&PrmContextBuffer->HandlerGuid)) {\r | |
309 | DEBUG ((DEBUG_ERROR, " %a %a: The PRM context buffer GUID is zero.\n", _DBGMSGID_, __FUNCTION__));\r | |
310 | return EFI_NOT_FOUND;\r | |
311 | }\r | |
312 | \r | |
313 | if (PrmContextBuffer->StaticDataBuffer != NULL && EFI_ERROR (ValidatePrmDataBuffer (PrmContextBuffer->StaticDataBuffer))) {\r | |
314 | DEBUG ((\r | |
315 | DEBUG_ERROR,\r | |
316 | " %a %a: Error in static buffer for PRM handler %g.\n",\r | |
317 | _DBGMSGID_,\r | |
318 | __FUNCTION__,\r | |
319 | &PrmContextBuffer->HandlerGuid\r | |
320 | ));\r | |
321 | return EFI_NOT_FOUND;\r | |
322 | }\r | |
323 | \r | |
324 | return EFI_SUCCESS;\r | |
325 | }\r | |
326 | \r | |
327 | /**\r | |
328 | Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r | |
329 | \r | |
330 | This is notification function converts any registered PRM_RUNTIME_MMIO_RANGE\r | |
331 | addresses to a virtual address.\r | |
332 | \r | |
333 | @param[in] Event Event whose notification function is being invoked.\r | |
334 | @param[in] Context Pointer to the notification function's context.\r | |
335 | \r | |
336 | **/\r | |
337 | VOID\r | |
338 | EFIAPI\r | |
339 | PrmConfigVirtualAddressChangeEvent (\r | |
340 | IN EFI_EVENT Event,\r | |
341 | IN VOID *Context\r | |
342 | )\r | |
343 | {\r | |
344 | UINTN Index;\r | |
345 | \r | |
3f7af17c MK |
346 | //\r |
347 | // Convert runtime MMIO ranges\r | |
348 | //\r | |
349 | for (Index = 0; Index < mMaxRuntimeMmioRangeCount; Index++) {\r | |
350 | ConvertRuntimeMemoryRangeAddresses (mRuntimeMmioRanges[Index]);\r | |
351 | }\r | |
352 | }\r | |
353 | \r | |
354 | /**\r | |
355 | The PRM Config END_OF_DXE protocol notification event handler.\r | |
356 | \r | |
357 | Finds all of the PRM_CONFIG_PROTOCOL instances installed at end of DXE and\r | |
358 | marks all PRM_RUNTIME_MMIO_RANGE entries as EFI_MEMORY_RUNTIME.\r | |
359 | \r | |
360 | @param[in] Event Event whose notification function is being invoked.\r | |
361 | @param[in] Context The pointer to the notification function's context,\r | |
362 | which is implementation-dependent.\r | |
363 | \r | |
364 | @retval EFI_SUCCESS The function executed successfully\r | |
365 | \r | |
366 | **/\r | |
367 | EFI_STATUS\r | |
368 | EFIAPI\r | |
369 | PrmConfigEndOfDxeNotification (\r | |
370 | IN EFI_EVENT Event,\r | |
371 | IN VOID *Context\r | |
372 | )\r | |
373 | {\r | |
374 | EFI_STATUS Status;\r | |
375 | UINTN HandleCount;\r | |
376 | UINTN BufferIndex;\r | |
377 | UINTN HandleIndex;\r | |
378 | EFI_HANDLE *HandleBuffer;\r | |
379 | PRM_CONTEXT_BUFFER *CurrentContextBuffer;\r | |
380 | PRM_CONFIG_PROTOCOL *PrmConfigProtocol;\r | |
381 | \r | |
382 | DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));\r | |
383 | \r | |
384 | HandleBuffer = NULL;\r | |
385 | Status = gBS->LocateHandleBuffer (\r | |
386 | ByProtocol,\r | |
387 | &gPrmConfigProtocolGuid,\r | |
388 | NULL,\r | |
389 | &HandleCount,\r | |
390 | &HandleBuffer\r | |
391 | );\r | |
392 | if (!EFI_ERROR (Status)) {\r | |
393 | for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {\r | |
394 | Status = gBS->HandleProtocol (\r | |
395 | HandleBuffer[HandleIndex],\r | |
396 | &gPrmConfigProtocolGuid,\r | |
397 | (VOID **) &PrmConfigProtocol\r | |
398 | );\r | |
399 | ASSERT_EFI_ERROR (Status);\r | |
400 | if (EFI_ERROR (Status) || PrmConfigProtocol == NULL) {\r | |
401 | continue;\r | |
402 | }\r | |
403 | \r | |
404 | DEBUG ((\r | |
405 | DEBUG_INFO,\r | |
406 | " %a %a: Found PRM configuration protocol for PRM module %g.\n",\r | |
407 | _DBGMSGID_,\r | |
408 | __FUNCTION__,\r | |
409 | &PrmConfigProtocol->ModuleContextBuffers.ModuleGuid\r | |
410 | ));\r | |
411 | \r | |
412 | DEBUG ((DEBUG_INFO, " %a %a: Validating module context buffers...\n", _DBGMSGID_, __FUNCTION__));\r | |
413 | for (BufferIndex = 0; BufferIndex < PrmConfigProtocol->ModuleContextBuffers.BufferCount; BufferIndex++) {\r | |
414 | CurrentContextBuffer = &(PrmConfigProtocol->ModuleContextBuffers.Buffer[BufferIndex]);\r | |
415 | \r | |
416 | Status = ValidatePrmContextBuffer (CurrentContextBuffer);\r | |
417 | if (EFI_ERROR (Status)) {\r | |
418 | DEBUG ((\r | |
419 | DEBUG_ERROR,\r | |
420 | " %a %a: Context buffer validation failed for PRM handler %g.\n",\r | |
421 | _DBGMSGID_,\r | |
422 | __FUNCTION__,\r | |
423 | CurrentContextBuffer->HandlerGuid\r | |
424 | ));\r | |
425 | }\r | |
3f7af17c MK |
426 | }\r |
427 | DEBUG ((DEBUG_INFO, " %a %a: Module context buffer validation complete.\n", _DBGMSGID_, __FUNCTION__));\r | |
428 | \r | |
429 | if (PrmConfigProtocol->ModuleContextBuffers.RuntimeMmioRanges != NULL) {\r | |
430 | DEBUG ((\r | |
431 | DEBUG_INFO,\r | |
e8467976 | 432 | " %a %a: Found %d PRM runtime MMIO ranges.\n",\r |
3f7af17c MK |
433 | _DBGMSGID_,\r |
434 | __FUNCTION__,\r | |
435 | PrmConfigProtocol->ModuleContextBuffers.RuntimeMmioRanges->Count\r | |
436 | ));\r | |
437 | SetRuntimeMemoryRangeAttributes (PrmConfigProtocol->ModuleContextBuffers.RuntimeMmioRanges);\r | |
438 | mMaxRuntimeMmioRangeCount++;\r | |
439 | }\r | |
440 | }\r | |
441 | \r | |
442 | StoreVirtualMemoryAddressChangePointers ();\r | |
443 | }\r | |
444 | \r | |
445 | if (HandleBuffer != NULL) {\r | |
446 | gBS->FreePool (HandleBuffer);\r | |
447 | }\r | |
448 | gBS->CloseEvent(Event);\r | |
449 | \r | |
450 | return EFI_SUCCESS;\r | |
451 | }\r | |
452 | \r | |
453 | /**\r | |
454 | The entry point for this module.\r | |
455 | \r | |
456 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
457 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
458 | \r | |
459 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
460 | @retval Others An error occurred when executing this entry point.\r | |
461 | \r | |
462 | **/\r | |
463 | EFI_STATUS\r | |
464 | EFIAPI\r | |
465 | PrmConfigEntryPoint (\r | |
466 | IN EFI_HANDLE ImageHandle,\r | |
467 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
468 | )\r | |
469 | {\r | |
470 | EFI_STATUS Status;\r | |
471 | EFI_EVENT Event;\r | |
472 | \r | |
473 | DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));\r | |
474 | \r | |
475 | //\r | |
476 | // Register a notification function to change memory attributes at end of DXE\r | |
477 | //\r | |
478 | Event = NULL;\r | |
479 | Status = gBS->CreateEventEx(\r | |
480 | EVT_NOTIFY_SIGNAL,\r | |
481 | TPL_CALLBACK,\r | |
482 | PrmConfigEndOfDxeNotification,\r | |
483 | NULL,\r | |
484 | &gEfiEndOfDxeEventGroupGuid,\r | |
485 | &Event\r | |
486 | );\r | |
487 | ASSERT_EFI_ERROR (Status);\r | |
488 | \r | |
489 | //\r | |
490 | // Register a notification function for virtual address change\r | |
491 | //\r | |
492 | Event = NULL;\r | |
493 | Status = gBS->CreateEventEx (\r | |
494 | EVT_NOTIFY_SIGNAL,\r | |
495 | TPL_NOTIFY,\r | |
496 | PrmConfigVirtualAddressChangeEvent,\r | |
497 | NULL,\r | |
498 | &gEfiEventVirtualAddressChangeGuid,\r | |
499 | &Event\r | |
500 | );\r | |
501 | ASSERT_EFI_ERROR (Status);\r | |
502 | \r | |
503 | return EFI_SUCCESS;\r | |
504 | }\r |