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1 | /** @file\r | |
2 | EFI PEI Core memory services\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | #include "PeiMain.h"\r | |
10 | \r | |
11 | /**\r | |
12 | \r | |
13 | Initialize the memory services.\r | |
14 | \r | |
15 | @param PrivateData Points to PeiCore's private instance data.\r | |
16 | @param SecCoreData Points to a data structure containing information about the PEI core's operating\r | |
17 | environment, such as the size and location of temporary RAM, the stack location and\r | |
18 | the BFV location.\r | |
19 | @param OldCoreData Pointer to the PEI Core data.\r | |
20 | NULL if being run in non-permanent memory mode.\r | |
21 | \r | |
22 | **/\r | |
23 | VOID\r | |
24 | InitializeMemoryServices (\r | |
25 | IN PEI_CORE_INSTANCE *PrivateData,\r | |
26 | IN CONST EFI_SEC_PEI_HAND_OFF *SecCoreData,\r | |
27 | IN PEI_CORE_INSTANCE *OldCoreData\r | |
28 | )\r | |
29 | {\r | |
30 | PrivateData->SwitchStackSignal = FALSE;\r | |
31 | \r | |
32 | //\r | |
33 | // First entering PeiCore, following code will initialized some field\r | |
34 | // in PeiCore's private data according to hand off data from SEC core.\r | |
35 | //\r | |
36 | if (OldCoreData == NULL) {\r | |
37 | PrivateData->PeiMemoryInstalled = FALSE;\r | |
38 | PrivateData->HobList.Raw = SecCoreData->PeiTemporaryRamBase;\r | |
39 | \r | |
40 | PeiCoreBuildHobHandoffInfoTable (\r | |
41 | BOOT_WITH_FULL_CONFIGURATION,\r | |
42 | (EFI_PHYSICAL_ADDRESS)(UINTN)SecCoreData->PeiTemporaryRamBase,\r | |
43 | (UINTN)SecCoreData->PeiTemporaryRamSize\r | |
44 | );\r | |
45 | \r | |
46 | //\r | |
47 | // Set Ps to point to ServiceTableShadow in Cache\r | |
48 | //\r | |
49 | PrivateData->Ps = &(PrivateData->ServiceTableShadow);\r | |
50 | }\r | |
51 | \r | |
52 | return;\r | |
53 | }\r | |
54 | \r | |
55 | /**\r | |
56 | \r | |
57 | This function registers the found memory configuration with the PEI Foundation.\r | |
58 | \r | |
59 | The usage model is that the PEIM that discovers the permanent memory shall invoke this service.\r | |
60 | This routine will hold discoveried memory information into PeiCore's private data,\r | |
61 | and set SwitchStackSignal flag. After PEIM who discovery memory is dispatched,\r | |
62 | PeiDispatcher will migrate temporary memory to permanent memory.\r | |
63 | \r | |
64 | @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.\r | |
65 | @param MemoryBegin Start of memory address.\r | |
66 | @param MemoryLength Length of memory.\r | |
67 | \r | |
68 | @return EFI_SUCCESS Always success.\r | |
69 | \r | |
70 | **/\r | |
71 | EFI_STATUS\r | |
72 | EFIAPI\r | |
73 | PeiInstallPeiMemory (\r | |
74 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
75 | IN EFI_PHYSICAL_ADDRESS MemoryBegin,\r | |
76 | IN UINT64 MemoryLength\r | |
77 | )\r | |
78 | {\r | |
79 | PEI_CORE_INSTANCE *PrivateData;\r | |
80 | \r | |
81 | DEBUG ((DEBUG_INFO, "PeiInstallPeiMemory MemoryBegin 0x%LX, MemoryLength 0x%LX\n", MemoryBegin, MemoryLength));\r | |
82 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r | |
83 | \r | |
84 | //\r | |
85 | // PEI_SERVICE.InstallPeiMemory should only be called one time during whole PEI phase.\r | |
86 | // If it is invoked more than one time, ASSERT information is given for developer debugging in debug tip and\r | |
87 | // simply return EFI_SUCCESS in release tip to ignore it.\r | |
88 | //\r | |
89 | if (PrivateData->PeiMemoryInstalled) {\r | |
90 | DEBUG ((DEBUG_ERROR, "ERROR: PeiInstallPeiMemory is called more than once!\n"));\r | |
91 | ASSERT (FALSE);\r | |
92 | return EFI_SUCCESS;\r | |
93 | }\r | |
94 | \r | |
95 | PrivateData->PhysicalMemoryBegin = MemoryBegin;\r | |
96 | PrivateData->PhysicalMemoryLength = MemoryLength;\r | |
97 | PrivateData->FreePhysicalMemoryTop = MemoryBegin + MemoryLength;\r | |
98 | \r | |
99 | PrivateData->SwitchStackSignal = TRUE;\r | |
100 | \r | |
101 | return EFI_SUCCESS;\r | |
102 | }\r | |
103 | \r | |
104 | /**\r | |
105 | Migrate memory pages allocated in pre-memory phase.\r | |
106 | Copy memory pages at temporary heap top to permanent heap top.\r | |
107 | \r | |
108 | @param[in] Private Pointer to the private data passed in from caller.\r | |
109 | @param[in] TemporaryRamMigrated Temporary memory has been migrated to permanent memory.\r | |
110 | \r | |
111 | **/\r | |
112 | VOID\r | |
113 | MigrateMemoryPages (\r | |
114 | IN PEI_CORE_INSTANCE *Private,\r | |
115 | IN BOOLEAN TemporaryRamMigrated\r | |
116 | )\r | |
117 | {\r | |
118 | EFI_PHYSICAL_ADDRESS NewMemPagesBase;\r | |
119 | EFI_PHYSICAL_ADDRESS MemPagesBase;\r | |
120 | \r | |
121 | Private->MemoryPages.Size = (UINTN)(Private->HobList.HandoffInformationTable->EfiMemoryTop -\r | |
122 | Private->HobList.HandoffInformationTable->EfiFreeMemoryTop);\r | |
123 | if (Private->MemoryPages.Size == 0) {\r | |
124 | //\r | |
125 | // No any memory page allocated in pre-memory phase.\r | |
126 | //\r | |
127 | return;\r | |
128 | }\r | |
129 | \r | |
130 | Private->MemoryPages.Base = Private->HobList.HandoffInformationTable->EfiFreeMemoryTop;\r | |
131 | \r | |
132 | ASSERT (Private->MemoryPages.Size <= Private->FreePhysicalMemoryTop);\r | |
133 | NewMemPagesBase = Private->FreePhysicalMemoryTop - Private->MemoryPages.Size;\r | |
134 | NewMemPagesBase &= ~(UINT64)EFI_PAGE_MASK;\r | |
135 | ASSERT (NewMemPagesBase >= Private->PhysicalMemoryBegin);\r | |
136 | //\r | |
137 | // Copy memory pages at temporary heap top to permanent heap top.\r | |
138 | //\r | |
139 | if (TemporaryRamMigrated) {\r | |
140 | //\r | |
141 | // Memory pages at temporary heap top has been migrated to permanent heap,\r | |
142 | // Here still needs to copy them from permanent heap to permanent heap top.\r | |
143 | //\r | |
144 | MemPagesBase = Private->MemoryPages.Base;\r | |
145 | if (Private->HeapOffsetPositive) {\r | |
146 | MemPagesBase += Private->HeapOffset;\r | |
147 | } else {\r | |
148 | MemPagesBase -= Private->HeapOffset;\r | |
149 | }\r | |
150 | \r | |
151 | CopyMem ((VOID *)(UINTN)NewMemPagesBase, (VOID *)(UINTN)MemPagesBase, Private->MemoryPages.Size);\r | |
152 | } else {\r | |
153 | CopyMem ((VOID *)(UINTN)NewMemPagesBase, (VOID *)(UINTN)Private->MemoryPages.Base, Private->MemoryPages.Size);\r | |
154 | }\r | |
155 | \r | |
156 | if (NewMemPagesBase >= Private->MemoryPages.Base) {\r | |
157 | Private->MemoryPages.OffsetPositive = TRUE;\r | |
158 | Private->MemoryPages.Offset = (UINTN)(NewMemPagesBase - Private->MemoryPages.Base);\r | |
159 | } else {\r | |
160 | Private->MemoryPages.OffsetPositive = FALSE;\r | |
161 | Private->MemoryPages.Offset = (UINTN)(Private->MemoryPages.Base - NewMemPagesBase);\r | |
162 | }\r | |
163 | \r | |
164 | DEBUG ((DEBUG_INFO, "Pages Offset = 0x%lX\n", (UINT64)Private->MemoryPages.Offset));\r | |
165 | \r | |
166 | Private->FreePhysicalMemoryTop = NewMemPagesBase;\r | |
167 | }\r | |
168 | \r | |
169 | /**\r | |
170 | Removes any FV HOBs whose base address is not in PEI installed memory.\r | |
171 | \r | |
172 | @param[in] Private Pointer to PeiCore's private data structure.\r | |
173 | \r | |
174 | **/\r | |
175 | VOID\r | |
176 | RemoveFvHobsInTemporaryMemory (\r | |
177 | IN PEI_CORE_INSTANCE *Private\r | |
178 | )\r | |
179 | {\r | |
180 | EFI_PEI_HOB_POINTERS Hob;\r | |
181 | EFI_HOB_FIRMWARE_VOLUME *FirmwareVolumeHob;\r | |
182 | \r | |
183 | DEBUG ((DEBUG_INFO, "Removing FVs in FV HOB not already migrated to permanent memory.\n"));\r | |
184 | \r | |
185 | for (Hob.Raw = GetHobList (); !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) {\r | |
186 | if ((GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV) || (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV2) || (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV3)) {\r | |
187 | FirmwareVolumeHob = Hob.FirmwareVolume;\r | |
188 | DEBUG ((DEBUG_INFO, " Found FV HOB.\n"));\r | |
189 | DEBUG ((\r | |
190 | DEBUG_INFO,\r | |
191 | " BA=%016lx L=%016lx\n",\r | |
192 | FirmwareVolumeHob->BaseAddress,\r | |
193 | FirmwareVolumeHob->Length\r | |
194 | ));\r | |
195 | if (\r | |
196 | !(\r | |
197 | ((EFI_PHYSICAL_ADDRESS)(UINTN)FirmwareVolumeHob->BaseAddress >= Private->PhysicalMemoryBegin) &&\r | |
198 | (((EFI_PHYSICAL_ADDRESS)(UINTN)FirmwareVolumeHob->BaseAddress + (FirmwareVolumeHob->Length - 1)) < Private->FreePhysicalMemoryTop)\r | |
199 | )\r | |
200 | )\r | |
201 | {\r | |
202 | DEBUG ((DEBUG_INFO, " Removing FV HOB to an FV in T-RAM (was not migrated).\n"));\r | |
203 | Hob.Header->HobType = EFI_HOB_TYPE_UNUSED;\r | |
204 | }\r | |
205 | }\r | |
206 | }\r | |
207 | }\r | |
208 | \r | |
209 | /**\r | |
210 | Migrate the base address in firmware volume allocation HOBs\r | |
211 | from temporary memory to PEI installed memory.\r | |
212 | \r | |
213 | @param[in] PrivateData Pointer to PeiCore's private data structure.\r | |
214 | @param[in] OrgFvHandle Address of FV Handle in temporary memory.\r | |
215 | @param[in] FvHandle Address of FV Handle in permanent memory.\r | |
216 | \r | |
217 | **/\r | |
218 | VOID\r | |
219 | ConvertFvHob (\r | |
220 | IN PEI_CORE_INSTANCE *PrivateData,\r | |
221 | IN UINTN OrgFvHandle,\r | |
222 | IN UINTN FvHandle\r | |
223 | )\r | |
224 | {\r | |
225 | EFI_PEI_HOB_POINTERS Hob;\r | |
226 | EFI_HOB_FIRMWARE_VOLUME *FirmwareVolumeHob;\r | |
227 | EFI_HOB_FIRMWARE_VOLUME2 *FirmwareVolume2Hob;\r | |
228 | EFI_HOB_FIRMWARE_VOLUME3 *FirmwareVolume3Hob;\r | |
229 | \r | |
230 | DEBUG ((DEBUG_INFO, "Converting FVs in FV HOB.\n"));\r | |
231 | \r | |
232 | for (Hob.Raw = GetHobList (); !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) {\r | |
233 | if (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV) {\r | |
234 | FirmwareVolumeHob = Hob.FirmwareVolume;\r | |
235 | if (FirmwareVolumeHob->BaseAddress == OrgFvHandle) {\r | |
236 | FirmwareVolumeHob->BaseAddress = FvHandle;\r | |
237 | }\r | |
238 | } else if (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV2) {\r | |
239 | FirmwareVolume2Hob = Hob.FirmwareVolume2;\r | |
240 | if (FirmwareVolume2Hob->BaseAddress == OrgFvHandle) {\r | |
241 | FirmwareVolume2Hob->BaseAddress = FvHandle;\r | |
242 | }\r | |
243 | } else if (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV3) {\r | |
244 | FirmwareVolume3Hob = Hob.FirmwareVolume3;\r | |
245 | if (FirmwareVolume3Hob->BaseAddress == OrgFvHandle) {\r | |
246 | FirmwareVolume3Hob->BaseAddress = FvHandle;\r | |
247 | }\r | |
248 | }\r | |
249 | }\r | |
250 | }\r | |
251 | \r | |
252 | /**\r | |
253 | Migrate MemoryBaseAddress in memory allocation HOBs\r | |
254 | from the temporary memory to PEI installed memory.\r | |
255 | \r | |
256 | @param[in] PrivateData Pointer to PeiCore's private data structure.\r | |
257 | \r | |
258 | **/\r | |
259 | VOID\r | |
260 | ConvertMemoryAllocationHobs (\r | |
261 | IN PEI_CORE_INSTANCE *PrivateData\r | |
262 | )\r | |
263 | {\r | |
264 | EFI_PEI_HOB_POINTERS Hob;\r | |
265 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
266 | EFI_PHYSICAL_ADDRESS OldMemPagesBase;\r | |
267 | UINTN OldMemPagesSize;\r | |
268 | \r | |
269 | if (PrivateData->MemoryPages.Size == 0) {\r | |
270 | //\r | |
271 | // No any memory page allocated in pre-memory phase.\r | |
272 | //\r | |
273 | return;\r | |
274 | }\r | |
275 | \r | |
276 | OldMemPagesBase = PrivateData->MemoryPages.Base;\r | |
277 | OldMemPagesSize = PrivateData->MemoryPages.Size;\r | |
278 | \r | |
279 | MemoryAllocationHob = NULL;\r | |
280 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
281 | while (Hob.Raw != NULL) {\r | |
282 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *)Hob.Raw;\r | |
283 | if ((MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress >= OldMemPagesBase) &&\r | |
284 | (MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress < (OldMemPagesBase + OldMemPagesSize))\r | |
285 | )\r | |
286 | {\r | |
287 | if (PrivateData->MemoryPages.OffsetPositive) {\r | |
288 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress += PrivateData->MemoryPages.Offset;\r | |
289 | } else {\r | |
290 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress -= PrivateData->MemoryPages.Offset;\r | |
291 | }\r | |
292 | }\r | |
293 | \r | |
294 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
295 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
296 | }\r | |
297 | }\r | |
298 | \r | |
299 | /**\r | |
300 | Internal function to build a HOB for the memory allocation.\r | |
301 | It will search and reuse the unused(freed) memory allocation HOB,\r | |
302 | or build memory allocation HOB normally if no unused(freed) memory allocation HOB found.\r | |
303 | \r | |
304 | @param[in] BaseAddress The 64 bit physical address of the memory.\r | |
305 | @param[in] Length The length of the memory allocation in bytes.\r | |
306 | @param[in] MemoryType The type of memory allocated by this HOB.\r | |
307 | \r | |
308 | **/\r | |
309 | VOID\r | |
310 | InternalBuildMemoryAllocationHob (\r | |
311 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
312 | IN UINT64 Length,\r | |
313 | IN EFI_MEMORY_TYPE MemoryType\r | |
314 | )\r | |
315 | {\r | |
316 | EFI_PEI_HOB_POINTERS Hob;\r | |
317 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
318 | \r | |
319 | //\r | |
320 | // Search unused(freed) memory allocation HOB.\r | |
321 | //\r | |
322 | MemoryAllocationHob = NULL;\r | |
323 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_UNUSED);\r | |
324 | while (Hob.Raw != NULL) {\r | |
325 | if (Hob.Header->HobLength == sizeof (EFI_HOB_MEMORY_ALLOCATION)) {\r | |
326 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *)Hob.Raw;\r | |
327 | break;\r | |
328 | }\r | |
329 | \r | |
330 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
331 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_UNUSED, Hob.Raw);\r | |
332 | }\r | |
333 | \r | |
334 | if (MemoryAllocationHob != NULL) {\r | |
335 | //\r | |
336 | // Reuse the unused(freed) memory allocation HOB.\r | |
337 | //\r | |
338 | MemoryAllocationHob->Header.HobType = EFI_HOB_TYPE_MEMORY_ALLOCATION;\r | |
339 | ZeroMem (&(MemoryAllocationHob->AllocDescriptor.Name), sizeof (EFI_GUID));\r | |
340 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress = BaseAddress;\r | |
341 | MemoryAllocationHob->AllocDescriptor.MemoryLength = Length;\r | |
342 | MemoryAllocationHob->AllocDescriptor.MemoryType = MemoryType;\r | |
343 | //\r | |
344 | // Zero the reserved space to match HOB spec\r | |
345 | //\r | |
346 | ZeroMem (MemoryAllocationHob->AllocDescriptor.Reserved, sizeof (MemoryAllocationHob->AllocDescriptor.Reserved));\r | |
347 | } else {\r | |
348 | //\r | |
349 | // No unused(freed) memory allocation HOB found.\r | |
350 | // Build memory allocation HOB normally.\r | |
351 | //\r | |
352 | BuildMemoryAllocationHob (\r | |
353 | BaseAddress,\r | |
354 | Length,\r | |
355 | MemoryType\r | |
356 | );\r | |
357 | }\r | |
358 | }\r | |
359 | \r | |
360 | /**\r | |
361 | Update or split memory allocation HOB for memory pages allocate and free.\r | |
362 | \r | |
363 | @param[in, out] MemoryAllocationHob Pointer to the memory allocation HOB\r | |
364 | that needs to be updated or split.\r | |
365 | On output, it will be filled with\r | |
366 | the input Memory, Bytes and MemoryType.\r | |
367 | @param[in] Memory Memory to allocate or free.\r | |
368 | @param[in] Bytes Bytes to allocate or free.\r | |
369 | @param[in] MemoryType EfiConventionalMemory for pages free,\r | |
370 | others for pages allocate.\r | |
371 | \r | |
372 | **/\r | |
373 | VOID\r | |
374 | UpdateOrSplitMemoryAllocationHob (\r | |
375 | IN OUT EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob,\r | |
376 | IN EFI_PHYSICAL_ADDRESS Memory,\r | |
377 | IN UINT64 Bytes,\r | |
378 | IN EFI_MEMORY_TYPE MemoryType\r | |
379 | )\r | |
380 | {\r | |
381 | if ((Memory + Bytes) <\r | |
382 | (MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress + MemoryAllocationHob->AllocDescriptor.MemoryLength))\r | |
383 | {\r | |
384 | //\r | |
385 | // Last pages need to be split out.\r | |
386 | //\r | |
387 | InternalBuildMemoryAllocationHob (\r | |
388 | Memory + Bytes,\r | |
389 | (MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress + MemoryAllocationHob->AllocDescriptor.MemoryLength) - (Memory + Bytes),\r | |
390 | MemoryAllocationHob->AllocDescriptor.MemoryType\r | |
391 | );\r | |
392 | }\r | |
393 | \r | |
394 | if (Memory > MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress) {\r | |
395 | //\r | |
396 | // First pages need to be split out.\r | |
397 | //\r | |
398 | InternalBuildMemoryAllocationHob (\r | |
399 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress,\r | |
400 | Memory - MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress,\r | |
401 | MemoryAllocationHob->AllocDescriptor.MemoryType\r | |
402 | );\r | |
403 | }\r | |
404 | \r | |
405 | //\r | |
406 | // Update the memory allocation HOB.\r | |
407 | //\r | |
408 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress = Memory;\r | |
409 | MemoryAllocationHob->AllocDescriptor.MemoryLength = Bytes;\r | |
410 | MemoryAllocationHob->AllocDescriptor.MemoryType = MemoryType;\r | |
411 | }\r | |
412 | \r | |
413 | /**\r | |
414 | Merge adjacent free memory ranges in memory allocation HOBs.\r | |
415 | \r | |
416 | @retval TRUE There are free memory ranges merged.\r | |
417 | @retval FALSE No free memory ranges merged.\r | |
418 | \r | |
419 | **/\r | |
420 | BOOLEAN\r | |
421 | MergeFreeMemoryInMemoryAllocationHob (\r | |
422 | VOID\r | |
423 | )\r | |
424 | {\r | |
425 | EFI_PEI_HOB_POINTERS Hob;\r | |
426 | EFI_PEI_HOB_POINTERS Hob2;\r | |
427 | EFI_HOB_MEMORY_ALLOCATION *MemoryHob;\r | |
428 | EFI_HOB_MEMORY_ALLOCATION *MemoryHob2;\r | |
429 | UINT64 Start;\r | |
430 | UINT64 End;\r | |
431 | BOOLEAN Merged;\r | |
432 | \r | |
433 | Merged = FALSE;\r | |
434 | \r | |
435 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
436 | while (Hob.Raw != NULL) {\r | |
437 | if (Hob.MemoryAllocation->AllocDescriptor.MemoryType == EfiConventionalMemory) {\r | |
438 | MemoryHob = (EFI_HOB_MEMORY_ALLOCATION *)Hob.Raw;\r | |
439 | Start = MemoryHob->AllocDescriptor.MemoryBaseAddress;\r | |
440 | End = MemoryHob->AllocDescriptor.MemoryBaseAddress + MemoryHob->AllocDescriptor.MemoryLength;\r | |
441 | \r | |
442 | Hob2.Raw = GET_NEXT_HOB (Hob);\r | |
443 | Hob2.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
444 | while (Hob2.Raw != NULL) {\r | |
445 | if (Hob2.MemoryAllocation->AllocDescriptor.MemoryType == EfiConventionalMemory) {\r | |
446 | MemoryHob2 = (EFI_HOB_MEMORY_ALLOCATION *)Hob2.Raw;\r | |
447 | if (Start == (MemoryHob2->AllocDescriptor.MemoryBaseAddress + MemoryHob2->AllocDescriptor.MemoryLength)) {\r | |
448 | //\r | |
449 | // Merge adjacent two free memory ranges.\r | |
450 | //\r | |
451 | MemoryHob2->AllocDescriptor.MemoryLength += MemoryHob->AllocDescriptor.MemoryLength;\r | |
452 | Merged = TRUE;\r | |
453 | //\r | |
454 | // Mark MemoryHob to be unused(freed).\r | |
455 | //\r | |
456 | MemoryHob->Header.HobType = EFI_HOB_TYPE_UNUSED;\r | |
457 | break;\r | |
458 | } else if (End == MemoryHob2->AllocDescriptor.MemoryBaseAddress) {\r | |
459 | //\r | |
460 | // Merge adjacent two free memory ranges.\r | |
461 | //\r | |
462 | MemoryHob2->AllocDescriptor.MemoryBaseAddress = MemoryHob->AllocDescriptor.MemoryBaseAddress;\r | |
463 | MemoryHob2->AllocDescriptor.MemoryLength += MemoryHob->AllocDescriptor.MemoryLength;\r | |
464 | Merged = TRUE;\r | |
465 | //\r | |
466 | // Mark MemoryHob to be unused(freed).\r | |
467 | //\r | |
468 | MemoryHob->Header.HobType = EFI_HOB_TYPE_UNUSED;\r | |
469 | break;\r | |
470 | }\r | |
471 | }\r | |
472 | \r | |
473 | Hob2.Raw = GET_NEXT_HOB (Hob2);\r | |
474 | Hob2.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob2.Raw);\r | |
475 | }\r | |
476 | }\r | |
477 | \r | |
478 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
479 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
480 | }\r | |
481 | \r | |
482 | return Merged;\r | |
483 | }\r | |
484 | \r | |
485 | /**\r | |
486 | Find free memory by searching memory allocation HOBs.\r | |
487 | \r | |
488 | @param[in] MemoryType The type of memory to allocate.\r | |
489 | @param[in] Pages The number of contiguous 4 KB pages to allocate.\r | |
490 | @param[in] Granularity Page allocation granularity.\r | |
491 | @param[out] Memory Pointer to a physical address. On output, the address is set to the base\r | |
492 | of the page range that was allocated.\r | |
493 | \r | |
494 | @retval EFI_SUCCESS The memory range was successfully allocated.\r | |
495 | @retval EFI_NOT_FOUND No memory allocation HOB with big enough free memory found.\r | |
496 | \r | |
497 | **/\r | |
498 | EFI_STATUS\r | |
499 | FindFreeMemoryFromMemoryAllocationHob (\r | |
500 | IN EFI_MEMORY_TYPE MemoryType,\r | |
501 | IN UINTN Pages,\r | |
502 | IN UINTN Granularity,\r | |
503 | OUT EFI_PHYSICAL_ADDRESS *Memory\r | |
504 | )\r | |
505 | {\r | |
506 | EFI_PEI_HOB_POINTERS Hob;\r | |
507 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
508 | UINT64 Bytes;\r | |
509 | EFI_PHYSICAL_ADDRESS BaseAddress;\r | |
510 | \r | |
511 | Bytes = LShiftU64 (Pages, EFI_PAGE_SHIFT);\r | |
512 | \r | |
513 | BaseAddress = 0;\r | |
514 | MemoryAllocationHob = NULL;\r | |
515 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
516 | while (Hob.Raw != NULL) {\r | |
517 | if ((Hob.MemoryAllocation->AllocDescriptor.MemoryType == EfiConventionalMemory) &&\r | |
518 | (Hob.MemoryAllocation->AllocDescriptor.MemoryLength >= Bytes))\r | |
519 | {\r | |
520 | //\r | |
521 | // Found one memory allocation HOB with big enough free memory.\r | |
522 | //\r | |
523 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *)Hob.Raw;\r | |
524 | BaseAddress = MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress +\r | |
525 | MemoryAllocationHob->AllocDescriptor.MemoryLength - Bytes;\r | |
526 | //\r | |
527 | // Make sure the granularity could be satisfied.\r | |
528 | //\r | |
529 | BaseAddress &= ~((EFI_PHYSICAL_ADDRESS)Granularity - 1);\r | |
530 | if (BaseAddress >= MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress) {\r | |
531 | break;\r | |
532 | }\r | |
533 | \r | |
534 | BaseAddress = 0;\r | |
535 | MemoryAllocationHob = NULL;\r | |
536 | }\r | |
537 | \r | |
538 | //\r | |
539 | // Continue to find.\r | |
540 | //\r | |
541 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
542 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
543 | }\r | |
544 | \r | |
545 | if (MemoryAllocationHob != NULL) {\r | |
546 | UpdateOrSplitMemoryAllocationHob (MemoryAllocationHob, BaseAddress, Bytes, MemoryType);\r | |
547 | *Memory = BaseAddress;\r | |
548 | return EFI_SUCCESS;\r | |
549 | } else {\r | |
550 | if (MergeFreeMemoryInMemoryAllocationHob ()) {\r | |
551 | //\r | |
552 | // Retry if there are free memory ranges merged.\r | |
553 | //\r | |
554 | return FindFreeMemoryFromMemoryAllocationHob (MemoryType, Pages, Granularity, Memory);\r | |
555 | }\r | |
556 | \r | |
557 | return EFI_NOT_FOUND;\r | |
558 | }\r | |
559 | }\r | |
560 | \r | |
561 | /**\r | |
562 | The purpose of the service is to publish an interface that allows\r | |
563 | PEIMs to allocate memory ranges that are managed by the PEI Foundation.\r | |
564 | \r | |
565 | Prior to InstallPeiMemory() being called, PEI will allocate pages from the heap.\r | |
566 | After InstallPeiMemory() is called, PEI will allocate pages within the region\r | |
567 | of memory provided by InstallPeiMemory() service in a best-effort fashion.\r | |
568 | Location-specific allocations are not managed by the PEI foundation code.\r | |
569 | \r | |
570 | @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.\r | |
571 | @param MemoryType The type of memory to allocate.\r | |
572 | @param Pages The number of contiguous 4 KB pages to allocate.\r | |
573 | @param Memory Pointer to a physical address. On output, the address is set to the base\r | |
574 | of the page range that was allocated.\r | |
575 | \r | |
576 | @retval EFI_SUCCESS The memory range was successfully allocated.\r | |
577 | @retval EFI_OUT_OF_RESOURCES The pages could not be allocated.\r | |
578 | @retval EFI_INVALID_PARAMETER Type is not equal to EfiLoaderCode, EfiLoaderData, EfiRuntimeServicesCode,\r | |
579 | EfiRuntimeServicesData, EfiBootServicesCode, EfiBootServicesData,\r | |
580 | EfiACPIReclaimMemory, EfiReservedMemoryType, or EfiACPIMemoryNVS.\r | |
581 | \r | |
582 | **/\r | |
583 | EFI_STATUS\r | |
584 | EFIAPI\r | |
585 | PeiAllocatePages (\r | |
586 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
587 | IN EFI_MEMORY_TYPE MemoryType,\r | |
588 | IN UINTN Pages,\r | |
589 | OUT EFI_PHYSICAL_ADDRESS *Memory\r | |
590 | )\r | |
591 | {\r | |
592 | EFI_STATUS Status;\r | |
593 | PEI_CORE_INSTANCE *PrivateData;\r | |
594 | EFI_PEI_HOB_POINTERS Hob;\r | |
595 | EFI_PHYSICAL_ADDRESS *FreeMemoryTop;\r | |
596 | EFI_PHYSICAL_ADDRESS *FreeMemoryBottom;\r | |
597 | UINTN RemainingPages;\r | |
598 | UINTN Granularity;\r | |
599 | UINTN Padding;\r | |
600 | \r | |
601 | if ((MemoryType != EfiLoaderCode) &&\r | |
602 | (MemoryType != EfiLoaderData) &&\r | |
603 | (MemoryType != EfiRuntimeServicesCode) &&\r | |
604 | (MemoryType != EfiRuntimeServicesData) &&\r | |
605 | (MemoryType != EfiBootServicesCode) &&\r | |
606 | (MemoryType != EfiBootServicesData) &&\r | |
607 | (MemoryType != EfiACPIReclaimMemory) &&\r | |
608 | (MemoryType != EfiReservedMemoryType) &&\r | |
609 | (MemoryType != EfiACPIMemoryNVS))\r | |
610 | {\r | |
611 | return EFI_INVALID_PARAMETER;\r | |
612 | }\r | |
613 | \r | |
614 | Granularity = DEFAULT_PAGE_ALLOCATION_GRANULARITY;\r | |
615 | \r | |
616 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r | |
617 | Hob.Raw = PrivateData->HobList.Raw;\r | |
618 | \r | |
619 | if (Hob.Raw == NULL) {\r | |
620 | //\r | |
621 | // HOB is not initialized yet.\r | |
622 | //\r | |
623 | return EFI_NOT_AVAILABLE_YET;\r | |
624 | }\r | |
625 | \r | |
626 | if ((RUNTIME_PAGE_ALLOCATION_GRANULARITY > DEFAULT_PAGE_ALLOCATION_GRANULARITY) &&\r | |
627 | ((MemoryType == EfiACPIReclaimMemory) ||\r | |
628 | (MemoryType == EfiACPIMemoryNVS) ||\r | |
629 | (MemoryType == EfiRuntimeServicesCode) ||\r | |
630 | (MemoryType == EfiRuntimeServicesData)))\r | |
631 | {\r | |
632 | Granularity = RUNTIME_PAGE_ALLOCATION_GRANULARITY;\r | |
633 | \r | |
634 | DEBUG ((\r | |
635 | DEBUG_INFO,\r | |
636 | "AllocatePages: aligning allocation to %d KB\n",\r | |
637 | Granularity / SIZE_1KB\r | |
638 | ));\r | |
639 | }\r | |
640 | \r | |
641 | if (!PrivateData->PeiMemoryInstalled && PrivateData->SwitchStackSignal) {\r | |
642 | //\r | |
643 | // When PeiInstallMemory is called but temporary memory has *not* been moved to permanent memory,\r | |
644 | // the AllocatePage will depend on the field of PEI_CORE_INSTANCE structure.\r | |
645 | //\r | |
646 | FreeMemoryTop = &(PrivateData->FreePhysicalMemoryTop);\r | |
647 | FreeMemoryBottom = &(PrivateData->PhysicalMemoryBegin);\r | |
648 | } else {\r | |
649 | FreeMemoryTop = &(Hob.HandoffInformationTable->EfiFreeMemoryTop);\r | |
650 | FreeMemoryBottom = &(Hob.HandoffInformationTable->EfiFreeMemoryBottom);\r | |
651 | }\r | |
652 | \r | |
653 | //\r | |
654 | // Check to see if on correct boundary for the memory type.\r | |
655 | // If not aligned, make the allocation aligned.\r | |
656 | //\r | |
657 | Padding = *(FreeMemoryTop) & (Granularity - 1);\r | |
658 | if ((UINTN)(*FreeMemoryTop - *FreeMemoryBottom) < Padding) {\r | |
659 | DEBUG ((DEBUG_ERROR, "AllocatePages failed: Out of space after padding.\n"));\r | |
660 | return EFI_OUT_OF_RESOURCES;\r | |
661 | }\r | |
662 | \r | |
663 | *(FreeMemoryTop) -= Padding;\r | |
664 | if (Padding >= EFI_PAGE_SIZE) {\r | |
665 | //\r | |
666 | // Create a memory allocation HOB to cover\r | |
667 | // the pages that we will lose to rounding\r | |
668 | //\r | |
669 | InternalBuildMemoryAllocationHob (\r | |
670 | *(FreeMemoryTop),\r | |
671 | Padding & ~(UINTN)EFI_PAGE_MASK,\r | |
672 | EfiConventionalMemory\r | |
673 | );\r | |
674 | }\r | |
675 | \r | |
676 | //\r | |
677 | // Verify that there is sufficient memory to satisfy the allocation.\r | |
678 | //\r | |
679 | RemainingPages = (UINTN)(*FreeMemoryTop - *FreeMemoryBottom) >> EFI_PAGE_SHIFT;\r | |
680 | //\r | |
681 | // The number of remaining pages needs to be greater than or equal to that of the request pages.\r | |
682 | //\r | |
683 | Pages = ALIGN_VALUE (Pages, EFI_SIZE_TO_PAGES (Granularity));\r | |
684 | if (RemainingPages < Pages) {\r | |
685 | //\r | |
686 | // Try to find free memory by searching memory allocation HOBs.\r | |
687 | //\r | |
688 | Status = FindFreeMemoryFromMemoryAllocationHob (MemoryType, Pages, Granularity, Memory);\r | |
689 | if (!EFI_ERROR (Status)) {\r | |
690 | return Status;\r | |
691 | }\r | |
692 | \r | |
693 | DEBUG ((DEBUG_ERROR, "AllocatePages failed: No 0x%lx Pages is available.\n", (UINT64)Pages));\r | |
694 | DEBUG ((DEBUG_ERROR, "There is only left 0x%lx pages memory resource to be allocated.\n", (UINT64)RemainingPages));\r | |
695 | return EFI_OUT_OF_RESOURCES;\r | |
696 | } else {\r | |
697 | //\r | |
698 | // Update the PHIT to reflect the memory usage\r | |
699 | //\r | |
700 | *(FreeMemoryTop) -= Pages * EFI_PAGE_SIZE;\r | |
701 | \r | |
702 | //\r | |
703 | // Update the value for the caller\r | |
704 | //\r | |
705 | *Memory = *(FreeMemoryTop);\r | |
706 | \r | |
707 | //\r | |
708 | // Create a memory allocation HOB.\r | |
709 | //\r | |
710 | InternalBuildMemoryAllocationHob (\r | |
711 | *(FreeMemoryTop),\r | |
712 | Pages * EFI_PAGE_SIZE,\r | |
713 | MemoryType\r | |
714 | );\r | |
715 | \r | |
716 | return EFI_SUCCESS;\r | |
717 | }\r | |
718 | }\r | |
719 | \r | |
720 | /**\r | |
721 | Mark the memory allocation HOB to be unused(freed) and update *FreeMemoryTop\r | |
722 | if MemoryBaseAddress == *FreeMemoryTop.\r | |
723 | \r | |
724 | @param[in] PrivateData Pointer to PeiCore's private data structure.\r | |
725 | @param[in, out] MemoryAllocationHobToFree Pointer to memory allocation HOB to be freed.\r | |
726 | \r | |
727 | **/\r | |
728 | VOID\r | |
729 | FreeMemoryAllocationHob (\r | |
730 | IN PEI_CORE_INSTANCE *PrivateData,\r | |
731 | IN OUT EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHobToFree\r | |
732 | )\r | |
733 | {\r | |
734 | EFI_PEI_HOB_POINTERS Hob;\r | |
735 | EFI_PHYSICAL_ADDRESS *FreeMemoryTop;\r | |
736 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
737 | \r | |
738 | Hob.Raw = PrivateData->HobList.Raw;\r | |
739 | \r | |
740 | if (!PrivateData->PeiMemoryInstalled && PrivateData->SwitchStackSignal) {\r | |
741 | //\r | |
742 | // When PeiInstallMemory is called but temporary memory has *not* been moved to permanent memory,\r | |
743 | // use the FreePhysicalMemoryTop field of PEI_CORE_INSTANCE structure.\r | |
744 | //\r | |
745 | FreeMemoryTop = &(PrivateData->FreePhysicalMemoryTop);\r | |
746 | } else {\r | |
747 | FreeMemoryTop = &(Hob.HandoffInformationTable->EfiFreeMemoryTop);\r | |
748 | }\r | |
749 | \r | |
750 | if (MemoryAllocationHobToFree->AllocDescriptor.MemoryBaseAddress == *FreeMemoryTop) {\r | |
751 | //\r | |
752 | // Update *FreeMemoryTop.\r | |
753 | //\r | |
754 | *FreeMemoryTop += MemoryAllocationHobToFree->AllocDescriptor.MemoryLength;\r | |
755 | //\r | |
756 | // Mark the memory allocation HOB to be unused(freed).\r | |
757 | //\r | |
758 | MemoryAllocationHobToFree->Header.HobType = EFI_HOB_TYPE_UNUSED;\r | |
759 | \r | |
760 | MemoryAllocationHob = NULL;\r | |
761 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
762 | while (Hob.Raw != NULL) {\r | |
763 | if ((Hob.MemoryAllocation->AllocDescriptor.MemoryType == EfiConventionalMemory) &&\r | |
764 | (Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress == *FreeMemoryTop))\r | |
765 | {\r | |
766 | //\r | |
767 | // Found memory allocation HOB that has EfiConventionalMemory MemoryType and\r | |
768 | // MemoryBaseAddress == new *FreeMemoryTop.\r | |
769 | //\r | |
770 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *)Hob.Raw;\r | |
771 | break;\r | |
772 | }\r | |
773 | \r | |
774 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
775 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
776 | }\r | |
777 | \r | |
778 | //\r | |
779 | // Free memory allocation HOB iteratively.\r | |
780 | //\r | |
781 | if (MemoryAllocationHob != NULL) {\r | |
782 | FreeMemoryAllocationHob (PrivateData, MemoryAllocationHob);\r | |
783 | }\r | |
784 | }\r | |
785 | }\r | |
786 | \r | |
787 | /**\r | |
788 | Frees memory pages.\r | |
789 | \r | |
790 | @param[in] PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.\r | |
791 | @param[in] Memory The base physical address of the pages to be freed.\r | |
792 | @param[in] Pages The number of contiguous 4 KB pages to free.\r | |
793 | \r | |
794 | @retval EFI_SUCCESS The requested pages were freed.\r | |
795 | @retval EFI_INVALID_PARAMETER Memory is not a page-aligned address or Pages is invalid.\r | |
796 | @retval EFI_NOT_FOUND The requested memory pages were not allocated with\r | |
797 | AllocatePages().\r | |
798 | \r | |
799 | **/\r | |
800 | EFI_STATUS\r | |
801 | EFIAPI\r | |
802 | PeiFreePages (\r | |
803 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
804 | IN EFI_PHYSICAL_ADDRESS Memory,\r | |
805 | IN UINTN Pages\r | |
806 | )\r | |
807 | {\r | |
808 | PEI_CORE_INSTANCE *PrivateData;\r | |
809 | UINT64 Bytes;\r | |
810 | UINT64 Start;\r | |
811 | UINT64 End;\r | |
812 | EFI_PEI_HOB_POINTERS Hob;\r | |
813 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
814 | \r | |
815 | Bytes = LShiftU64 (Pages, EFI_PAGE_SHIFT);\r | |
816 | Start = Memory;\r | |
817 | End = Start + Bytes - 1;\r | |
818 | \r | |
819 | if ((Pages == 0) || ((Start & EFI_PAGE_MASK) != 0) || (Start >= End)) {\r | |
820 | return EFI_INVALID_PARAMETER;\r | |
821 | }\r | |
822 | \r | |
823 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r | |
824 | Hob.Raw = PrivateData->HobList.Raw;\r | |
825 | \r | |
826 | if (Hob.Raw == NULL) {\r | |
827 | //\r | |
828 | // HOB is not initialized yet.\r | |
829 | //\r | |
830 | return EFI_NOT_AVAILABLE_YET;\r | |
831 | }\r | |
832 | \r | |
833 | MemoryAllocationHob = NULL;\r | |
834 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
835 | while (Hob.Raw != NULL) {\r | |
836 | if ((Hob.MemoryAllocation->AllocDescriptor.MemoryType != EfiConventionalMemory) &&\r | |
837 | (Memory >= Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress) &&\r | |
838 | ((Memory + Bytes) <= (Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress + Hob.MemoryAllocation->AllocDescriptor.MemoryLength)))\r | |
839 | {\r | |
840 | //\r | |
841 | // Found the memory allocation HOB that includes the memory pages to be freed.\r | |
842 | //\r | |
843 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *)Hob.Raw;\r | |
844 | break;\r | |
845 | }\r | |
846 | \r | |
847 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
848 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
849 | }\r | |
850 | \r | |
851 | if (MemoryAllocationHob != NULL) {\r | |
852 | UpdateOrSplitMemoryAllocationHob (MemoryAllocationHob, Memory, Bytes, EfiConventionalMemory);\r | |
853 | FreeMemoryAllocationHob (PrivateData, MemoryAllocationHob);\r | |
854 | return EFI_SUCCESS;\r | |
855 | } else {\r | |
856 | return EFI_NOT_FOUND;\r | |
857 | }\r | |
858 | }\r | |
859 | \r | |
860 | /**\r | |
861 | \r | |
862 | Pool allocation service. Before permanent memory is discovered, the pool will\r | |
863 | be allocated in the heap in temporary memory. Generally, the size of the heap in temporary\r | |
864 | memory does not exceed 64K, so the biggest pool size could be allocated is\r | |
865 | 64K.\r | |
866 | \r | |
867 | @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.\r | |
868 | @param Size Amount of memory required\r | |
869 | @param Buffer Address of pointer to the buffer\r | |
870 | \r | |
871 | @retval EFI_SUCCESS The allocation was successful\r | |
872 | @retval EFI_OUT_OF_RESOURCES There is not enough heap to satisfy the requirement\r | |
873 | to allocate the requested size.\r | |
874 | \r | |
875 | **/\r | |
876 | EFI_STATUS\r | |
877 | EFIAPI\r | |
878 | PeiAllocatePool (\r | |
879 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
880 | IN UINTN Size,\r | |
881 | OUT VOID **Buffer\r | |
882 | )\r | |
883 | {\r | |
884 | EFI_STATUS Status;\r | |
885 | EFI_HOB_MEMORY_POOL *Hob;\r | |
886 | \r | |
887 | //\r | |
888 | // If some "post-memory" PEIM wishes to allocate larger pool,\r | |
889 | // it should use AllocatePages service instead.\r | |
890 | //\r | |
891 | \r | |
892 | //\r | |
893 | // Generally, the size of heap in temporary memory does not exceed 64K,\r | |
894 | // HobLength is multiples of 8 bytes, so the maximum size of pool is 0xFFF8 - sizeof (EFI_HOB_MEMORY_POOL)\r | |
895 | //\r | |
896 | if (Size > (0xFFF8 - sizeof (EFI_HOB_MEMORY_POOL))) {\r | |
897 | return EFI_OUT_OF_RESOURCES;\r | |
898 | }\r | |
899 | \r | |
900 | Status = PeiServicesCreateHob (\r | |
901 | EFI_HOB_TYPE_MEMORY_POOL,\r | |
902 | (UINT16)(sizeof (EFI_HOB_MEMORY_POOL) + Size),\r | |
903 | (VOID **)&Hob\r | |
904 | );\r | |
905 | ASSERT_EFI_ERROR (Status);\r | |
906 | \r | |
907 | if (EFI_ERROR (Status)) {\r | |
908 | *Buffer = NULL;\r | |
909 | } else {\r | |
910 | *Buffer = Hob + 1;\r | |
911 | }\r | |
912 | \r | |
913 | return Status;\r | |
914 | }\r |