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615c6dd0 | 1 | /** @file\r |
b1f6a7c6 | 2 | EFI PEI Core memory services\r |
d1102dba | 3 | \r |
d39d1260 | 4 | Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r |
9d510e61 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
192f6d4c | 6 | \r |
615c6dd0 | 7 | **/\r |
192f6d4c | 8 | \r |
0d516397 | 9 | #include "PeiMain.h"\r |
192f6d4c | 10 | \r |
b1f6a7c6 | 11 | /**\r |
192f6d4c | 12 | \r |
13 | Initialize the memory services.\r | |
14 | \r | |
82b8c8df | 15 | @param PrivateData Points to PeiCore's private instance data.\r |
b1f6a7c6 | 16 | @param SecCoreData Points to a data structure containing information about the PEI core's operating\r |
5aae0aa7 | 17 | environment, such as the size and location of temporary RAM, the stack location and\r |
18 | the BFV location.\r | |
b1f6a7c6 | 19 | @param OldCoreData Pointer to the PEI Core data.\r |
d39d1260 | 20 | NULL if being run in non-permanent memory mode.\r |
192f6d4c | 21 | \r |
b1f6a7c6 | 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 | |
192f6d4c | 29 | {\r |
d1102dba | 30 | \r |
63b62331 | 31 | PrivateData->SwitchStackSignal = FALSE;\r |
192f6d4c | 32 | \r |
40f26b8f | 33 | //\r |
34 | // First entering PeiCore, following code will initialized some field\r | |
d39d1260 | 35 | // in PeiCore's private data according to hand off data from SEC core.\r |
40f26b8f | 36 | //\r |
192f6d4c | 37 | if (OldCoreData == NULL) {\r |
38 | \r | |
39 | PrivateData->PeiMemoryInstalled = FALSE;\r | |
63b62331 | 40 | PrivateData->HobList.Raw = SecCoreData->PeiTemporaryRamBase;\r |
d1102dba | 41 | \r |
192f6d4c | 42 | PeiCoreBuildHobHandoffInfoTable (\r |
43 | BOOT_WITH_FULL_CONFIGURATION,\r | |
63b62331 | 44 | (EFI_PHYSICAL_ADDRESS) (UINTN) SecCoreData->PeiTemporaryRamBase,\r |
5aae0aa7 | 45 | (UINTN) SecCoreData->PeiTemporaryRamSize\r |
192f6d4c | 46 | );\r |
192f6d4c | 47 | \r |
48 | //\r | |
4140a663 | 49 | // Set Ps to point to ServiceTableShadow in Cache\r |
192f6d4c | 50 | //\r |
4140a663 | 51 | PrivateData->Ps = &(PrivateData->ServiceTableShadow);\r |
b0d803fe | 52 | }\r |
d1102dba | 53 | \r |
192f6d4c | 54 | return;\r |
55 | }\r | |
56 | \r | |
b1f6a7c6 | 57 | /**\r |
58 | \r | |
82b8c8df | 59 | This function registers the found memory configuration with the PEI Foundation.\r |
b1f6a7c6 | 60 | \r |
82b8c8df | 61 | The usage model is that the PEIM that discovers the permanent memory shall invoke this service.\r |
62 | This routine will hold discoveried memory information into PeiCore's private data,\r | |
63 | and set SwitchStackSignal flag. After PEIM who discovery memory is dispatched,\r | |
d39d1260 | 64 | PeiDispatcher will migrate temporary memory to permanent memory.\r |
d1102dba | 65 | \r |
d73d93c3 | 66 | @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.\r |
67 | @param MemoryBegin Start of memory address.\r | |
68 | @param MemoryLength Length of memory.\r | |
b1f6a7c6 | 69 | \r |
70 | @return EFI_SUCCESS Always success.\r | |
71 | \r | |
72 | **/\r | |
192f6d4c | 73 | EFI_STATUS\r |
74 | EFIAPI\r | |
75 | PeiInstallPeiMemory (\r | |
58dcdada | 76 | IN CONST EFI_PEI_SERVICES **PeiServices,\r |
77 | IN EFI_PHYSICAL_ADDRESS MemoryBegin,\r | |
78 | IN UINT64 MemoryLength\r | |
192f6d4c | 79 | )\r |
192f6d4c | 80 | {\r |
81 | PEI_CORE_INSTANCE *PrivateData;\r | |
58dcdada | 82 | \r |
a3a15d21 | 83 | DEBUG ((EFI_D_INFO, "PeiInstallPeiMemory MemoryBegin 0x%LX, MemoryLength 0x%LX\n", MemoryBegin, MemoryLength));\r |
192f6d4c | 84 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r |
85 | \r | |
3152f167 | 86 | //\r |
87 | // PEI_SERVICE.InstallPeiMemory should only be called one time during whole PEI phase.\r | |
88 | // If it is invoked more than one time, ASSERT information is given for developer debugging in debug tip and\r | |
d39d1260 | 89 | // simply return EFI_SUCCESS in release tip to ignore it.\r |
d1102dba | 90 | //\r |
3152f167 | 91 | if (PrivateData->PeiMemoryInstalled) {\r |
92 | DEBUG ((EFI_D_ERROR, "ERROR: PeiInstallPeiMemory is called more than once!\n"));\r | |
305d3c8e | 93 | ASSERT (FALSE);\r |
3152f167 | 94 | return EFI_SUCCESS;\r |
95 | }\r | |
d1102dba | 96 | \r |
58dcdada | 97 | PrivateData->PhysicalMemoryBegin = MemoryBegin;\r |
98 | PrivateData->PhysicalMemoryLength = MemoryLength;\r | |
99 | PrivateData->FreePhysicalMemoryTop = MemoryBegin + MemoryLength;\r | |
d1102dba | 100 | \r |
58dcdada | 101 | PrivateData->SwitchStackSignal = TRUE;\r |
192f6d4c | 102 | \r |
d1102dba | 103 | return EFI_SUCCESS;\r |
192f6d4c | 104 | }\r |
105 | \r | |
b1f6a7c6 | 106 | /**\r |
b2374cec SZ |
107 | Migrate memory pages allocated in pre-memory phase.\r |
108 | Copy memory pages at temporary heap top to permanent heap top.\r | |
109 | \r | |
110 | @param[in] Private Pointer to the private data passed in from caller.\r | |
111 | @param[in] TemporaryRamMigrated Temporary memory has been migrated to permanent memory.\r | |
112 | \r | |
113 | **/\r | |
114 | VOID\r | |
115 | MigrateMemoryPages (\r | |
116 | IN PEI_CORE_INSTANCE *Private,\r | |
117 | IN BOOLEAN TemporaryRamMigrated\r | |
118 | )\r | |
119 | {\r | |
120 | EFI_PHYSICAL_ADDRESS NewMemPagesBase;\r | |
121 | EFI_PHYSICAL_ADDRESS MemPagesBase;\r | |
122 | \r | |
123 | Private->MemoryPages.Size = (UINTN) (Private->HobList.HandoffInformationTable->EfiMemoryTop -\r | |
124 | Private->HobList.HandoffInformationTable->EfiFreeMemoryTop);\r | |
125 | if (Private->MemoryPages.Size == 0) {\r | |
126 | //\r | |
127 | // No any memory page allocated in pre-memory phase.\r | |
128 | //\r | |
129 | return;\r | |
130 | }\r | |
131 | Private->MemoryPages.Base = Private->HobList.HandoffInformationTable->EfiFreeMemoryTop;\r | |
132 | \r | |
133 | ASSERT (Private->MemoryPages.Size <= Private->FreePhysicalMemoryTop);\r | |
134 | NewMemPagesBase = Private->FreePhysicalMemoryTop - Private->MemoryPages.Size;\r | |
135 | NewMemPagesBase &= ~(UINT64)EFI_PAGE_MASK;\r | |
136 | ASSERT (NewMemPagesBase >= Private->PhysicalMemoryBegin);\r | |
137 | //\r | |
138 | // Copy memory pages at temporary heap top to permanent heap top.\r | |
139 | //\r | |
140 | if (TemporaryRamMigrated) {\r | |
141 | //\r | |
142 | // Memory pages at temporary heap top has been migrated to permanent heap,\r | |
143 | // Here still needs to copy them from permanent heap to permanent heap top.\r | |
144 | //\r | |
145 | MemPagesBase = Private->MemoryPages.Base;\r | |
146 | if (Private->HeapOffsetPositive) {\r | |
147 | MemPagesBase += Private->HeapOffset;\r | |
148 | } else {\r | |
149 | MemPagesBase -= Private->HeapOffset;\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 | |
9bedaec0 MK |
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 | DEBUG ((DEBUG_INFO, " Removing FV HOB to an FV in T-RAM (was not migrated).\n"));\r | |
202 | Hob.Header->HobType = EFI_HOB_TYPE_UNUSED;\r | |
203 | }\r | |
204 | }\r | |
205 | }\r | |
206 | }\r | |
207 | \r | |
208 | /**\r | |
209 | Migrate the base address in firmware volume allocation HOBs\r | |
210 | from temporary memory to PEI installed memory.\r | |
211 | \r | |
212 | @param[in] PrivateData Pointer to PeiCore's private data structure.\r | |
213 | @param[in] OrgFvHandle Address of FV Handle in temporary memory.\r | |
214 | @param[in] FvHandle Address of FV Handle in permanent memory.\r | |
215 | \r | |
216 | **/\r | |
217 | VOID\r | |
218 | ConvertFvHob (\r | |
219 | IN PEI_CORE_INSTANCE *PrivateData,\r | |
220 | IN UINTN OrgFvHandle,\r | |
221 | IN UINTN FvHandle\r | |
222 | )\r | |
223 | {\r | |
224 | EFI_PEI_HOB_POINTERS Hob;\r | |
225 | EFI_HOB_FIRMWARE_VOLUME *FirmwareVolumeHob;\r | |
226 | EFI_HOB_FIRMWARE_VOLUME2 *FirmwareVolume2Hob;\r | |
227 | EFI_HOB_FIRMWARE_VOLUME3 *FirmwareVolume3Hob;\r | |
228 | \r | |
229 | DEBUG ((DEBUG_INFO, "Converting FVs in FV HOB.\n"));\r | |
230 | \r | |
231 | for (Hob.Raw = GetHobList (); !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) {\r | |
232 | if (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV) {\r | |
233 | FirmwareVolumeHob = Hob.FirmwareVolume;\r | |
234 | if (FirmwareVolumeHob->BaseAddress == OrgFvHandle) {\r | |
235 | FirmwareVolumeHob->BaseAddress = FvHandle;\r | |
236 | }\r | |
237 | } else if (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV2) {\r | |
238 | FirmwareVolume2Hob = Hob.FirmwareVolume2;\r | |
239 | if (FirmwareVolume2Hob->BaseAddress == OrgFvHandle) {\r | |
240 | FirmwareVolume2Hob->BaseAddress = FvHandle;\r | |
241 | }\r | |
242 | } else if (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_FV3) {\r | |
243 | FirmwareVolume3Hob = Hob.FirmwareVolume3;\r | |
244 | if (FirmwareVolume3Hob->BaseAddress == OrgFvHandle) {\r | |
245 | FirmwareVolume3Hob->BaseAddress = FvHandle;\r | |
246 | }\r | |
247 | }\r | |
248 | }\r | |
249 | }\r | |
250 | \r | |
b2374cec SZ |
251 | /**\r |
252 | Migrate MemoryBaseAddress in memory allocation HOBs\r | |
253 | from the temporary memory to PEI installed memory.\r | |
254 | \r | |
255 | @param[in] PrivateData Pointer to PeiCore's private data structure.\r | |
256 | \r | |
257 | **/\r | |
258 | VOID\r | |
259 | ConvertMemoryAllocationHobs (\r | |
260 | IN PEI_CORE_INSTANCE *PrivateData\r | |
261 | )\r | |
262 | {\r | |
263 | EFI_PEI_HOB_POINTERS Hob;\r | |
264 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
265 | EFI_PHYSICAL_ADDRESS OldMemPagesBase;\r | |
266 | UINTN OldMemPagesSize;\r | |
267 | \r | |
268 | if (PrivateData->MemoryPages.Size == 0) {\r | |
269 | //\r | |
270 | // No any memory page allocated in pre-memory phase.\r | |
271 | //\r | |
272 | return;\r | |
273 | }\r | |
274 | \r | |
275 | OldMemPagesBase = PrivateData->MemoryPages.Base;\r | |
276 | OldMemPagesSize = PrivateData->MemoryPages.Size;\r | |
277 | \r | |
278 | MemoryAllocationHob = NULL;\r | |
279 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
280 | while (Hob.Raw != NULL) {\r | |
281 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *) Hob.Raw;\r | |
282 | if ((MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress >= OldMemPagesBase) &&\r | |
283 | (MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress < (OldMemPagesBase + OldMemPagesSize))\r | |
284 | ) {\r | |
285 | if (PrivateData->MemoryPages.OffsetPositive) {\r | |
286 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress += PrivateData->MemoryPages.Offset;\r | |
287 | } else {\r | |
288 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress -= PrivateData->MemoryPages.Offset;\r | |
289 | }\r | |
290 | }\r | |
291 | \r | |
292 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
293 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
294 | }\r | |
295 | }\r | |
296 | \r | |
297 | /**\r | |
298 | Internal function to build a HOB for the memory allocation.\r | |
299 | It will search and reuse the unused(freed) memory allocation HOB,\r | |
300 | or build memory allocation HOB normally if no unused(freed) memory allocation HOB found.\r | |
301 | \r | |
302 | @param[in] BaseAddress The 64 bit physical address of the memory.\r | |
303 | @param[in] Length The length of the memory allocation in bytes.\r | |
304 | @param[in] MemoryType The type of memory allocated by this HOB.\r | |
305 | \r | |
306 | **/\r | |
307 | VOID\r | |
308 | InternalBuildMemoryAllocationHob (\r | |
309 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
310 | IN UINT64 Length,\r | |
311 | IN EFI_MEMORY_TYPE MemoryType\r | |
312 | )\r | |
313 | {\r | |
314 | EFI_PEI_HOB_POINTERS Hob;\r | |
315 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
316 | \r | |
317 | //\r | |
318 | // Search unused(freed) memory allocation HOB.\r | |
319 | //\r | |
320 | MemoryAllocationHob = NULL;\r | |
321 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_UNUSED);\r | |
322 | while (Hob.Raw != NULL) {\r | |
323 | if (Hob.Header->HobLength == sizeof (EFI_HOB_MEMORY_ALLOCATION)) {\r | |
324 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *) Hob.Raw;\r | |
325 | break;\r | |
326 | }\r | |
327 | \r | |
328 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
329 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_UNUSED, Hob.Raw);\r | |
330 | }\r | |
331 | \r | |
332 | if (MemoryAllocationHob != NULL) {\r | |
333 | //\r | |
334 | // Reuse the unused(freed) memory allocation HOB.\r | |
335 | //\r | |
336 | MemoryAllocationHob->Header.HobType = EFI_HOB_TYPE_MEMORY_ALLOCATION;\r | |
337 | ZeroMem (&(MemoryAllocationHob->AllocDescriptor.Name), sizeof (EFI_GUID));\r | |
338 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress = BaseAddress;\r | |
339 | MemoryAllocationHob->AllocDescriptor.MemoryLength = Length;\r | |
340 | MemoryAllocationHob->AllocDescriptor.MemoryType = MemoryType;\r | |
341 | //\r | |
342 | // Zero the reserved space to match HOB spec\r | |
343 | //\r | |
344 | ZeroMem (MemoryAllocationHob->AllocDescriptor.Reserved, sizeof (MemoryAllocationHob->AllocDescriptor.Reserved));\r | |
345 | } else {\r | |
346 | //\r | |
347 | // No unused(freed) memory allocation HOB found.\r | |
348 | // Build memory allocation HOB normally.\r | |
349 | //\r | |
350 | BuildMemoryAllocationHob (\r | |
351 | BaseAddress,\r | |
352 | Length,\r | |
353 | MemoryType\r | |
354 | );\r | |
355 | }\r | |
356 | }\r | |
357 | \r | |
358 | /**\r | |
359 | Update or split memory allocation HOB for memory pages allocate and free.\r | |
360 | \r | |
361 | @param[in, out] MemoryAllocationHob Pointer to the memory allocation HOB\r | |
362 | that needs to be updated or split.\r | |
363 | On output, it will be filled with\r | |
364 | the input Memory, Bytes and MemoryType.\r | |
365 | @param[in] Memory Memory to allocate or free.\r | |
366 | @param[in] Bytes Bytes to allocate or free.\r | |
367 | @param[in] MemoryType EfiConventionalMemory for pages free,\r | |
368 | others for pages allocate.\r | |
369 | \r | |
370 | **/\r | |
371 | VOID\r | |
372 | UpdateOrSplitMemoryAllocationHob (\r | |
373 | IN OUT EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob,\r | |
374 | IN EFI_PHYSICAL_ADDRESS Memory,\r | |
375 | IN UINT64 Bytes,\r | |
376 | IN EFI_MEMORY_TYPE MemoryType\r | |
377 | )\r | |
378 | {\r | |
379 | if ((Memory + Bytes) <\r | |
380 | (MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress + MemoryAllocationHob->AllocDescriptor.MemoryLength)) {\r | |
381 | //\r | |
382 | // Last pages need to be split out.\r | |
383 | //\r | |
384 | InternalBuildMemoryAllocationHob (\r | |
385 | Memory + Bytes,\r | |
386 | (MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress + MemoryAllocationHob->AllocDescriptor.MemoryLength) - (Memory + Bytes),\r | |
387 | MemoryAllocationHob->AllocDescriptor.MemoryType\r | |
388 | );\r | |
389 | }\r | |
390 | \r | |
391 | if (Memory > MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress) {\r | |
392 | //\r | |
393 | // First pages need to be split out.\r | |
394 | //\r | |
395 | InternalBuildMemoryAllocationHob (\r | |
396 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress,\r | |
397 | Memory - MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress,\r | |
398 | MemoryAllocationHob->AllocDescriptor.MemoryType\r | |
399 | );\r | |
400 | }\r | |
401 | \r | |
402 | //\r | |
403 | // Update the memory allocation HOB.\r | |
404 | //\r | |
405 | MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress = Memory;\r | |
406 | MemoryAllocationHob->AllocDescriptor.MemoryLength = Bytes;\r | |
407 | MemoryAllocationHob->AllocDescriptor.MemoryType = MemoryType;\r | |
408 | }\r | |
409 | \r | |
410 | /**\r | |
411 | Merge adjacent free memory ranges in memory allocation HOBs.\r | |
412 | \r | |
413 | @retval TRUE There are free memory ranges merged.\r | |
414 | @retval FALSE No free memory ranges merged.\r | |
415 | \r | |
416 | **/\r | |
417 | BOOLEAN\r | |
418 | MergeFreeMemoryInMemoryAllocationHob (\r | |
419 | VOID\r | |
420 | )\r | |
421 | {\r | |
422 | EFI_PEI_HOB_POINTERS Hob;\r | |
423 | EFI_PEI_HOB_POINTERS Hob2;\r | |
424 | EFI_HOB_MEMORY_ALLOCATION *MemoryHob;\r | |
425 | EFI_HOB_MEMORY_ALLOCATION *MemoryHob2;\r | |
426 | UINT64 Start;\r | |
427 | UINT64 End;\r | |
428 | BOOLEAN Merged;\r | |
429 | \r | |
430 | Merged = FALSE;\r | |
431 | \r | |
432 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
433 | while (Hob.Raw != NULL) {\r | |
434 | if (Hob.MemoryAllocation->AllocDescriptor.MemoryType == EfiConventionalMemory) {\r | |
435 | MemoryHob = (EFI_HOB_MEMORY_ALLOCATION *) Hob.Raw;\r | |
436 | Start = MemoryHob->AllocDescriptor.MemoryBaseAddress;\r | |
437 | End = MemoryHob->AllocDescriptor.MemoryBaseAddress + MemoryHob->AllocDescriptor.MemoryLength;\r | |
438 | \r | |
439 | Hob2.Raw = GET_NEXT_HOB (Hob);\r | |
440 | Hob2.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
441 | while (Hob2.Raw != NULL) {\r | |
442 | if (Hob2.MemoryAllocation->AllocDescriptor.MemoryType == EfiConventionalMemory) {\r | |
443 | MemoryHob2 = (EFI_HOB_MEMORY_ALLOCATION *) Hob2.Raw;\r | |
444 | if (Start == (MemoryHob2->AllocDescriptor.MemoryBaseAddress + MemoryHob2->AllocDescriptor.MemoryLength)) {\r | |
445 | //\r | |
446 | // Merge adjacent two free memory ranges.\r | |
447 | //\r | |
448 | MemoryHob2->AllocDescriptor.MemoryLength += MemoryHob->AllocDescriptor.MemoryLength;\r | |
449 | Merged = TRUE;\r | |
450 | //\r | |
451 | // Mark MemoryHob to be unused(freed).\r | |
452 | //\r | |
453 | MemoryHob->Header.HobType = EFI_HOB_TYPE_UNUSED;\r | |
454 | break;\r | |
455 | } else if (End == MemoryHob2->AllocDescriptor.MemoryBaseAddress) {\r | |
456 | //\r | |
457 | // Merge adjacent two free memory ranges.\r | |
458 | //\r | |
459 | MemoryHob2->AllocDescriptor.MemoryBaseAddress = MemoryHob->AllocDescriptor.MemoryBaseAddress;\r | |
460 | MemoryHob2->AllocDescriptor.MemoryLength += MemoryHob->AllocDescriptor.MemoryLength;\r | |
461 | Merged = TRUE;\r | |
462 | //\r | |
463 | // Mark MemoryHob to be unused(freed).\r | |
464 | //\r | |
465 | MemoryHob->Header.HobType = EFI_HOB_TYPE_UNUSED;\r | |
466 | break;\r | |
467 | }\r | |
468 | }\r | |
469 | Hob2.Raw = GET_NEXT_HOB (Hob2);\r | |
470 | Hob2.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob2.Raw);\r | |
471 | }\r | |
472 | }\r | |
473 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
474 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
475 | }\r | |
476 | \r | |
477 | return Merged;\r | |
478 | }\r | |
479 | \r | |
480 | /**\r | |
481 | Find free memory by searching memory allocation HOBs.\r | |
482 | \r | |
483 | @param[in] MemoryType The type of memory to allocate.\r | |
484 | @param[in] Pages The number of contiguous 4 KB pages to allocate.\r | |
485 | @param[in] Granularity Page allocation granularity.\r | |
486 | @param[out] Memory Pointer to a physical address. On output, the address is set to the base\r | |
487 | of the page range that was allocated.\r | |
488 | \r | |
489 | @retval EFI_SUCCESS The memory range was successfully allocated.\r | |
490 | @retval EFI_NOT_FOUND No memory allocation HOB with big enough free memory found.\r | |
491 | \r | |
492 | **/\r | |
493 | EFI_STATUS\r | |
494 | FindFreeMemoryFromMemoryAllocationHob (\r | |
495 | IN EFI_MEMORY_TYPE MemoryType,\r | |
496 | IN UINTN Pages,\r | |
497 | IN UINTN Granularity,\r | |
498 | OUT EFI_PHYSICAL_ADDRESS *Memory\r | |
499 | )\r | |
500 | {\r | |
501 | EFI_PEI_HOB_POINTERS Hob;\r | |
502 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
503 | UINT64 Bytes;\r | |
504 | EFI_PHYSICAL_ADDRESS BaseAddress;\r | |
505 | \r | |
506 | Bytes = LShiftU64 (Pages, EFI_PAGE_SHIFT);\r | |
507 | \r | |
508 | BaseAddress = 0;\r | |
509 | MemoryAllocationHob = NULL;\r | |
510 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
511 | while (Hob.Raw != NULL) {\r | |
512 | if ((Hob.MemoryAllocation->AllocDescriptor.MemoryType == EfiConventionalMemory) &&\r | |
513 | (Hob.MemoryAllocation->AllocDescriptor.MemoryLength >= Bytes)) {\r | |
514 | //\r | |
515 | // Found one memory allocation HOB with big enough free memory.\r | |
516 | //\r | |
517 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *) Hob.Raw;\r | |
518 | BaseAddress = MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress +\r | |
519 | MemoryAllocationHob->AllocDescriptor.MemoryLength - Bytes;\r | |
520 | //\r | |
521 | // Make sure the granularity could be satisfied.\r | |
522 | //\r | |
523 | BaseAddress &= ~((EFI_PHYSICAL_ADDRESS) Granularity - 1);\r | |
524 | if (BaseAddress >= MemoryAllocationHob->AllocDescriptor.MemoryBaseAddress) {\r | |
525 | break;\r | |
526 | }\r | |
527 | BaseAddress = 0;\r | |
528 | MemoryAllocationHob = NULL;\r | |
529 | }\r | |
530 | //\r | |
531 | // Continue to find.\r | |
532 | //\r | |
533 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
534 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
535 | }\r | |
536 | \r | |
537 | if (MemoryAllocationHob != NULL) {\r | |
538 | UpdateOrSplitMemoryAllocationHob (MemoryAllocationHob, BaseAddress, Bytes, MemoryType);\r | |
539 | *Memory = BaseAddress;\r | |
540 | return EFI_SUCCESS;\r | |
541 | } else {\r | |
542 | if (MergeFreeMemoryInMemoryAllocationHob ()) {\r | |
543 | //\r | |
544 | // Retry if there are free memory ranges merged.\r | |
545 | //\r | |
546 | return FindFreeMemoryFromMemoryAllocationHob (MemoryType, Pages, Granularity, Memory);\r | |
547 | }\r | |
548 | return EFI_NOT_FOUND;\r | |
549 | }\r | |
550 | }\r | |
551 | \r | |
552 | /**\r | |
553 | The purpose of the service is to publish an interface that allows\r | |
64ca6802 | 554 | PEIMs to allocate memory ranges that are managed by the PEI Foundation.\r |
b1f6a7c6 | 555 | \r |
b2374cec SZ |
556 | Prior to InstallPeiMemory() being called, PEI will allocate pages from the heap.\r |
557 | After InstallPeiMemory() is called, PEI will allocate pages within the region\r | |
558 | of memory provided by InstallPeiMemory() service in a best-effort fashion.\r | |
559 | Location-specific allocations are not managed by the PEI foundation code.\r | |
560 | \r | |
64ca6802 | 561 | @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.\r |
562 | @param MemoryType The type of memory to allocate.\r | |
563 | @param Pages The number of contiguous 4 KB pages to allocate.\r | |
b2374cec | 564 | @param Memory Pointer to a physical address. On output, the address is set to the base\r |
64ca6802 | 565 | of the page range that was allocated.\r |
b1f6a7c6 | 566 | \r |
64ca6802 | 567 | @retval EFI_SUCCESS The memory range was successfully allocated.\r |
568 | @retval EFI_OUT_OF_RESOURCES The pages could not be allocated.\r | |
b2374cec | 569 | @retval EFI_INVALID_PARAMETER Type is not equal to EfiLoaderCode, EfiLoaderData, EfiRuntimeServicesCode,\r |
64ca6802 | 570 | EfiRuntimeServicesData, EfiBootServicesCode, EfiBootServicesData,\r |
ab6fb25a | 571 | EfiACPIReclaimMemory, EfiReservedMemoryType, or EfiACPIMemoryNVS.\r |
b1f6a7c6 | 572 | \r |
573 | **/\r | |
192f6d4c | 574 | EFI_STATUS\r |
575 | EFIAPI\r | |
576 | PeiAllocatePages (\r | |
82b8c8df | 577 | IN CONST EFI_PEI_SERVICES **PeiServices,\r |
578 | IN EFI_MEMORY_TYPE MemoryType,\r | |
579 | IN UINTN Pages,\r | |
580 | OUT EFI_PHYSICAL_ADDRESS *Memory\r | |
192f6d4c | 581 | )\r |
192f6d4c | 582 | {\r |
b2374cec | 583 | EFI_STATUS Status;\r |
192f6d4c | 584 | PEI_CORE_INSTANCE *PrivateData;\r |
585 | EFI_PEI_HOB_POINTERS Hob;\r | |
58dcdada | 586 | EFI_PHYSICAL_ADDRESS *FreeMemoryTop;\r |
587 | EFI_PHYSICAL_ADDRESS *FreeMemoryBottom;\r | |
62031991 | 588 | UINTN RemainingPages;\r |
e1e7e0fb AB |
589 | UINTN Granularity;\r |
590 | UINTN Padding;\r | |
192f6d4c | 591 | \r |
64ca6802 | 592 | if ((MemoryType != EfiLoaderCode) &&\r |
593 | (MemoryType != EfiLoaderData) &&\r | |
594 | (MemoryType != EfiRuntimeServicesCode) &&\r | |
595 | (MemoryType != EfiRuntimeServicesData) &&\r | |
596 | (MemoryType != EfiBootServicesCode) &&\r | |
597 | (MemoryType != EfiBootServicesData) &&\r | |
598 | (MemoryType != EfiACPIReclaimMemory) &&\r | |
ab6fb25a | 599 | (MemoryType != EfiReservedMemoryType) &&\r |
64ca6802 | 600 | (MemoryType != EfiACPIMemoryNVS)) {\r |
601 | return EFI_INVALID_PARAMETER;\r | |
602 | }\r | |
603 | \r | |
e1e7e0fb AB |
604 | Granularity = DEFAULT_PAGE_ALLOCATION_GRANULARITY;\r |
605 | \r | |
b2374cec SZ |
606 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r |
607 | Hob.Raw = PrivateData->HobList.Raw;\r | |
608 | \r | |
609 | if (Hob.Raw == NULL) {\r | |
610 | //\r | |
611 | // HOB is not initialized yet.\r | |
612 | //\r | |
613 | return EFI_NOT_AVAILABLE_YET;\r | |
614 | }\r | |
615 | \r | |
e1e7e0fb AB |
616 | if (RUNTIME_PAGE_ALLOCATION_GRANULARITY > DEFAULT_PAGE_ALLOCATION_GRANULARITY &&\r |
617 | (MemoryType == EfiACPIReclaimMemory ||\r | |
618 | MemoryType == EfiACPIMemoryNVS ||\r | |
619 | MemoryType == EfiRuntimeServicesCode ||\r | |
620 | MemoryType == EfiRuntimeServicesData)) {\r | |
621 | \r | |
622 | Granularity = RUNTIME_PAGE_ALLOCATION_GRANULARITY;\r | |
623 | \r | |
624 | DEBUG ((DEBUG_INFO, "AllocatePages: aligning allocation to %d KB\n",\r | |
625 | Granularity / SIZE_1KB));\r | |
626 | }\r | |
627 | \r | |
b2374cec | 628 | if (!PrivateData->PeiMemoryInstalled && PrivateData->SwitchStackSignal) {\r |
58dcdada | 629 | //\r |
b2374cec | 630 | // When PeiInstallMemory is called but temporary memory has *not* been moved to permanent memory,\r |
5f300691 | 631 | // the AllocatePage will depend on the field of PEI_CORE_INSTANCE structure.\r |
58dcdada | 632 | //\r |
b2374cec SZ |
633 | FreeMemoryTop = &(PrivateData->FreePhysicalMemoryTop);\r |
634 | FreeMemoryBottom = &(PrivateData->PhysicalMemoryBegin);\r | |
58dcdada | 635 | } else {\r |
636 | FreeMemoryTop = &(Hob.HandoffInformationTable->EfiFreeMemoryTop);\r | |
637 | FreeMemoryBottom = &(Hob.HandoffInformationTable->EfiFreeMemoryBottom);\r | |
192f6d4c | 638 | }\r |
639 | \r | |
192f6d4c | 640 | //\r |
e1e7e0fb AB |
641 | // Check to see if on correct boundary for the memory type.\r |
642 | // If not aligned, make the allocation aligned.\r | |
192f6d4c | 643 | //\r |
e1e7e0fb AB |
644 | Padding = *(FreeMemoryTop) & (Granularity - 1);\r |
645 | if ((UINTN) (*FreeMemoryTop - *FreeMemoryBottom) < Padding) {\r | |
646 | DEBUG ((DEBUG_ERROR, "AllocatePages failed: Out of space after padding.\n"));\r | |
647 | return EFI_OUT_OF_RESOURCES;\r | |
648 | }\r | |
649 | \r | |
650 | *(FreeMemoryTop) -= Padding;\r | |
651 | if (Padding >= EFI_PAGE_SIZE) {\r | |
652 | //\r | |
653 | // Create a memory allocation HOB to cover\r | |
654 | // the pages that we will lose to rounding\r | |
655 | //\r | |
b2374cec | 656 | InternalBuildMemoryAllocationHob (\r |
e1e7e0fb AB |
657 | *(FreeMemoryTop),\r |
658 | Padding & ~(UINTN)EFI_PAGE_MASK,\r | |
659 | EfiConventionalMemory\r | |
660 | );\r | |
661 | }\r | |
5e574a01 | 662 | \r |
192f6d4c | 663 | //\r |
5e574a01 | 664 | // Verify that there is sufficient memory to satisfy the allocation.\r |
192f6d4c | 665 | //\r |
b2374cec | 666 | RemainingPages = (UINTN)(*FreeMemoryTop - *FreeMemoryBottom) >> EFI_PAGE_SHIFT;\r |
98a601b1 | 667 | //\r |
5e574a01 | 668 | // The number of remaining pages needs to be greater than or equal to that of the request pages.\r |
98a601b1 | 669 | //\r |
e1e7e0fb | 670 | Pages = ALIGN_VALUE (Pages, EFI_SIZE_TO_PAGES (Granularity));\r |
5e574a01 | 671 | if (RemainingPages < Pages) {\r |
b2374cec SZ |
672 | //\r |
673 | // Try to find free memory by searching memory allocation HOBs.\r | |
674 | //\r | |
675 | Status = FindFreeMemoryFromMemoryAllocationHob (MemoryType, Pages, Granularity, Memory);\r | |
676 | if (!EFI_ERROR (Status)) {\r | |
677 | return Status;\r | |
678 | }\r | |
62031991 | 679 | DEBUG ((EFI_D_ERROR, "AllocatePages failed: No 0x%lx Pages is available.\n", (UINT64) Pages));\r |
680 | DEBUG ((EFI_D_ERROR, "There is only left 0x%lx pages memory resource to be allocated.\n", (UINT64) RemainingPages));\r | |
192f6d4c | 681 | return EFI_OUT_OF_RESOURCES;\r |
682 | } else {\r | |
683 | //\r | |
684 | // Update the PHIT to reflect the memory usage\r | |
685 | //\r | |
58dcdada | 686 | *(FreeMemoryTop) -= Pages * EFI_PAGE_SIZE;\r |
192f6d4c | 687 | \r |
688 | //\r | |
689 | // Update the value for the caller\r | |
690 | //\r | |
58dcdada | 691 | *Memory = *(FreeMemoryTop);\r |
192f6d4c | 692 | \r |
693 | //\r | |
694 | // Create a memory allocation HOB.\r | |
695 | //\r | |
b2374cec | 696 | InternalBuildMemoryAllocationHob (\r |
58dcdada | 697 | *(FreeMemoryTop),\r |
0a7d0741 | 698 | Pages * EFI_PAGE_SIZE,\r |
192f6d4c | 699 | MemoryType\r |
700 | );\r | |
701 | \r | |
702 | return EFI_SUCCESS;\r | |
703 | }\r | |
704 | }\r | |
705 | \r | |
b2374cec SZ |
706 | /**\r |
707 | Mark the memory allocation HOB to be unused(freed) and update *FreeMemoryTop\r | |
708 | if MemoryBaseAddress == *FreeMemoryTop.\r | |
709 | \r | |
710 | @param[in] PrivateData Pointer to PeiCore's private data structure.\r | |
711 | @param[in, out] MemoryAllocationHobToFree Pointer to memory allocation HOB to be freed.\r | |
712 | \r | |
713 | **/\r | |
714 | VOID\r | |
715 | FreeMemoryAllocationHob (\r | |
716 | IN PEI_CORE_INSTANCE *PrivateData,\r | |
717 | IN OUT EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHobToFree\r | |
718 | )\r | |
719 | {\r | |
720 | EFI_PEI_HOB_POINTERS Hob;\r | |
721 | EFI_PHYSICAL_ADDRESS *FreeMemoryTop;\r | |
722 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
723 | \r | |
724 | Hob.Raw = PrivateData->HobList.Raw;\r | |
725 | \r | |
726 | if (!PrivateData->PeiMemoryInstalled && PrivateData->SwitchStackSignal) {\r | |
727 | //\r | |
728 | // When PeiInstallMemory is called but temporary memory has *not* been moved to permanent memory,\r | |
729 | // use the FreePhysicalMemoryTop field of PEI_CORE_INSTANCE structure.\r | |
730 | //\r | |
731 | FreeMemoryTop = &(PrivateData->FreePhysicalMemoryTop);\r | |
732 | } else {\r | |
733 | FreeMemoryTop = &(Hob.HandoffInformationTable->EfiFreeMemoryTop);\r | |
734 | }\r | |
735 | \r | |
736 | if (MemoryAllocationHobToFree->AllocDescriptor.MemoryBaseAddress == *FreeMemoryTop) {\r | |
737 | //\r | |
738 | // Update *FreeMemoryTop.\r | |
739 | //\r | |
740 | *FreeMemoryTop += MemoryAllocationHobToFree->AllocDescriptor.MemoryLength;\r | |
741 | //\r | |
742 | // Mark the memory allocation HOB to be unused(freed).\r | |
743 | //\r | |
744 | MemoryAllocationHobToFree->Header.HobType = EFI_HOB_TYPE_UNUSED;\r | |
745 | \r | |
746 | MemoryAllocationHob = NULL;\r | |
747 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
748 | while (Hob.Raw != NULL) {\r | |
749 | if ((Hob.MemoryAllocation->AllocDescriptor.MemoryType == EfiConventionalMemory) &&\r | |
750 | (Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress == *FreeMemoryTop)) {\r | |
751 | //\r | |
752 | // Found memory allocation HOB that has EfiConventionalMemory MemoryType and\r | |
753 | // MemoryBaseAddress == new *FreeMemoryTop.\r | |
754 | //\r | |
755 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *) Hob.Raw;\r | |
756 | break;\r | |
757 | }\r | |
758 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
759 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
760 | }\r | |
761 | //\r | |
762 | // Free memory allocation HOB iteratively.\r | |
763 | //\r | |
764 | if (MemoryAllocationHob != NULL) {\r | |
765 | FreeMemoryAllocationHob (PrivateData, MemoryAllocationHob);\r | |
766 | }\r | |
767 | }\r | |
768 | }\r | |
769 | \r | |
770 | /**\r | |
771 | Frees memory pages.\r | |
772 | \r | |
773 | @param[in] PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.\r | |
774 | @param[in] Memory The base physical address of the pages to be freed.\r | |
775 | @param[in] Pages The number of contiguous 4 KB pages to free.\r | |
776 | \r | |
777 | @retval EFI_SUCCESS The requested pages were freed.\r | |
778 | @retval EFI_INVALID_PARAMETER Memory is not a page-aligned address or Pages is invalid.\r | |
779 | @retval EFI_NOT_FOUND The requested memory pages were not allocated with\r | |
780 | AllocatePages().\r | |
781 | \r | |
782 | **/\r | |
783 | EFI_STATUS\r | |
784 | EFIAPI\r | |
785 | PeiFreePages (\r | |
786 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
787 | IN EFI_PHYSICAL_ADDRESS Memory,\r | |
788 | IN UINTN Pages\r | |
789 | )\r | |
790 | {\r | |
791 | PEI_CORE_INSTANCE *PrivateData;\r | |
792 | UINT64 Bytes;\r | |
793 | UINT64 Start;\r | |
794 | UINT64 End;\r | |
795 | EFI_PEI_HOB_POINTERS Hob;\r | |
796 | EFI_HOB_MEMORY_ALLOCATION *MemoryAllocationHob;\r | |
797 | \r | |
798 | Bytes = LShiftU64 (Pages, EFI_PAGE_SHIFT);\r | |
799 | Start = Memory;\r | |
800 | End = Start + Bytes - 1;\r | |
801 | \r | |
802 | if (Pages == 0 || ((Start & EFI_PAGE_MASK) != 0) || (Start >= End)) {\r | |
803 | return EFI_INVALID_PARAMETER;\r | |
804 | }\r | |
805 | \r | |
806 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r | |
807 | Hob.Raw = PrivateData->HobList.Raw;\r | |
808 | \r | |
809 | if (Hob.Raw == NULL) {\r | |
810 | //\r | |
811 | // HOB is not initialized yet.\r | |
812 | //\r | |
813 | return EFI_NOT_AVAILABLE_YET;\r | |
814 | }\r | |
815 | \r | |
816 | MemoryAllocationHob = NULL;\r | |
817 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
818 | while (Hob.Raw != NULL) {\r | |
819 | if ((Hob.MemoryAllocation->AllocDescriptor.MemoryType != EfiConventionalMemory) &&\r | |
820 | (Memory >= Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress) &&\r | |
821 | ((Memory + Bytes) <= (Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress + Hob.MemoryAllocation->AllocDescriptor.MemoryLength))) {\r | |
822 | //\r | |
823 | // Found the memory allocation HOB that includes the memory pages to be freed.\r | |
824 | //\r | |
825 | MemoryAllocationHob = (EFI_HOB_MEMORY_ALLOCATION *) Hob.Raw;\r | |
826 | break;\r | |
827 | }\r | |
828 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
829 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
830 | }\r | |
831 | \r | |
832 | if (MemoryAllocationHob != NULL) {\r | |
833 | UpdateOrSplitMemoryAllocationHob (MemoryAllocationHob, Memory, Bytes, EfiConventionalMemory);\r | |
834 | FreeMemoryAllocationHob (PrivateData, MemoryAllocationHob);\r | |
835 | return EFI_SUCCESS;\r | |
836 | } else {\r | |
837 | return EFI_NOT_FOUND;\r | |
838 | }\r | |
839 | }\r | |
840 | \r | |
b1f6a7c6 | 841 | /**\r |
842 | \r | |
d39d1260 | 843 | Pool allocation service. Before permanent memory is discovered, the pool will\r |
d3add11e MK |
844 | be allocated in the heap in temporary memory. Generally, the size of the heap in temporary\r |
845 | memory does not exceed 64K, so the biggest pool size could be allocated is\r | |
82b8c8df | 846 | 64K.\r |
b1f6a7c6 | 847 | \r |
82b8c8df | 848 | @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.\r |
849 | @param Size Amount of memory required\r | |
850 | @param Buffer Address of pointer to the buffer\r | |
b1f6a7c6 | 851 | \r |
852 | @retval EFI_SUCCESS The allocation was successful\r | |
853 | @retval EFI_OUT_OF_RESOURCES There is not enough heap to satisfy the requirement\r | |
854 | to allocate the requested size.\r | |
855 | \r | |
856 | **/\r | |
192f6d4c | 857 | EFI_STATUS\r |
858 | EFIAPI\r | |
859 | PeiAllocatePool (\r | |
82b8c8df | 860 | IN CONST EFI_PEI_SERVICES **PeiServices,\r |
861 | IN UINTN Size,\r | |
862 | OUT VOID **Buffer\r | |
192f6d4c | 863 | )\r |
192f6d4c | 864 | {\r |
865 | EFI_STATUS Status;\r | |
866 | EFI_HOB_MEMORY_POOL *Hob;\r | |
867 | \r | |
82b8c8df | 868 | //\r |
869 | // If some "post-memory" PEIM wishes to allocate larger pool,\r | |
870 | // it should use AllocatePages service instead.\r | |
871 | //\r | |
d1102dba | 872 | \r |
82b8c8df | 873 | //\r |
d3add11e | 874 | // Generally, the size of heap in temporary memory does not exceed 64K,\r |
d39d1260 | 875 | // HobLength is multiples of 8 bytes, so the maximum size of pool is 0xFFF8 - sizeof (EFI_HOB_MEMORY_POOL)\r |
82b8c8df | 876 | //\r |
e94728b3 | 877 | if (Size > (0xFFF8 - sizeof (EFI_HOB_MEMORY_POOL))) {\r |
2e76dc7e | 878 | return EFI_OUT_OF_RESOURCES;\r |
879 | }\r | |
d1102dba | 880 | \r |
82b8c8df | 881 | Status = PeiServicesCreateHob (\r |
192f6d4c | 882 | EFI_HOB_TYPE_MEMORY_POOL,\r |
883 | (UINT16)(sizeof (EFI_HOB_MEMORY_POOL) + Size),\r | |
884 | (VOID **)&Hob\r | |
885 | );\r | |
772cba09 | 886 | ASSERT_EFI_ERROR (Status);\r |
8797683f BB |
887 | \r |
888 | if (EFI_ERROR (Status)) {\r | |
889 | *Buffer = NULL;\r | |
890 | } else {\r | |
891 | *Buffer = Hob + 1;\r | |
892 | }\r | |
192f6d4c | 893 | \r |
192f6d4c | 894 | return Status;\r |
895 | }\r |