]>
Commit | Line | Data |
---|---|---|
1 | /** @file\r | |
2 | \r | |
3 | UEFI Memory page management functions.\r | |
4 | \r | |
5 | Copyright (c) 2007 - 2008, Intel Corporation \r | |
6 | All rights reserved. This program and the accompanying materials \r | |
7 | are licensed and made available under the terms and conditions of the BSD License \r | |
8 | which accompanies this distribution. The full text of the license may be found at \r | |
9 | http://opensource.org/licenses/bsd-license.php \r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <DxeMain.h>\r | |
17 | \r | |
18 | #define EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT (EFI_PAGE_SIZE)\r | |
19 | \r | |
20 | //\r | |
21 | // Entry for tracking the memory regions for each memory type to help cooalese like memory types\r | |
22 | //\r | |
23 | typedef struct {\r | |
24 | EFI_PHYSICAL_ADDRESS BaseAddress;\r | |
25 | EFI_PHYSICAL_ADDRESS MaximumAddress;\r | |
26 | UINT64 CurrentNumberOfPages;\r | |
27 | UINT64 NumberOfPages;\r | |
28 | UINTN InformationIndex;\r | |
29 | BOOLEAN Special;\r | |
30 | BOOLEAN Runtime;\r | |
31 | } EFI_MEMORY_TYPE_STAISTICS;\r | |
32 | \r | |
33 | //\r | |
34 | // MemoryMap - The current memory map\r | |
35 | //\r | |
36 | UINTN mMemoryMapKey = 0;\r | |
37 | \r | |
38 | //\r | |
39 | // mMapStack - space to use as temp storage to build new map descriptors\r | |
40 | // mMapDepth - depth of new descriptor stack\r | |
41 | //\r | |
42 | \r | |
43 | #define MAX_MAP_DEPTH 6\r | |
44 | UINTN mMapDepth = 0;\r | |
45 | MEMORY_MAP mMapStack[MAX_MAP_DEPTH];\r | |
46 | UINTN mFreeMapStack = 0;\r | |
47 | //\r | |
48 | // This list maintain the free memory map list\r | |
49 | //\r | |
50 | LIST_ENTRY mFreeMemoryMapEntryList = INITIALIZE_LIST_HEAD_VARIABLE (mFreeMemoryMapEntryList);\r | |
51 | BOOLEAN mMemoryTypeInformationInitialized = FALSE;\r | |
52 | \r | |
53 | EFI_MEMORY_TYPE_STAISTICS mMemoryTypeStatistics[EfiMaxMemoryType + 1] = {\r | |
54 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, TRUE, FALSE }, // EfiReservedMemoryType\r | |
55 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE }, // EfiLoaderCode\r | |
56 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE }, // EfiLoaderData\r | |
57 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE }, // EfiBootServicesCode\r | |
58 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE }, // EfiBootServicesData\r | |
59 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, TRUE, TRUE }, // EfiRuntimeServicesCode\r | |
60 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, TRUE, TRUE }, // EfiRuntimeServicesData\r | |
61 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE }, // EfiConventionalMemory\r | |
62 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE }, // EfiUnusableMemory\r | |
63 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, TRUE, FALSE }, // EfiACPIReclaimMemory\r | |
64 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, TRUE, FALSE }, // EfiACPIMemoryNVS\r | |
65 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE }, // EfiMemoryMappedIO\r | |
66 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE }, // EfiMemoryMappedIOPortSpace\r | |
67 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, TRUE, TRUE }, // EfiPalCode\r | |
68 | { 0, EFI_MAX_ADDRESS, 0, 0, EfiMaxMemoryType, FALSE, FALSE } // EfiMaxMemoryType\r | |
69 | };\r | |
70 | \r | |
71 | EFI_PHYSICAL_ADDRESS mDefaultMaximumAddress = EFI_MAX_ADDRESS;\r | |
72 | \r | |
73 | EFI_MEMORY_TYPE_INFORMATION gMemoryTypeInformation[EfiMaxMemoryType + 1] = {\r | |
74 | { EfiReservedMemoryType, 0 },\r | |
75 | { EfiLoaderCode, 0 },\r | |
76 | { EfiLoaderData, 0 },\r | |
77 | { EfiBootServicesCode, 0 },\r | |
78 | { EfiBootServicesData, 0 },\r | |
79 | { EfiRuntimeServicesCode, 0 },\r | |
80 | { EfiRuntimeServicesData, 0 },\r | |
81 | { EfiConventionalMemory, 0 },\r | |
82 | { EfiUnusableMemory, 0 },\r | |
83 | { EfiACPIReclaimMemory, 0 },\r | |
84 | { EfiACPIMemoryNVS, 0 },\r | |
85 | { EfiMemoryMappedIO, 0 },\r | |
86 | { EfiMemoryMappedIOPortSpace, 0 },\r | |
87 | { EfiPalCode, 0 },\r | |
88 | { EfiMaxMemoryType, 0 }\r | |
89 | };\r | |
90 | \r | |
91 | //\r | |
92 | // Internal prototypes\r | |
93 | //\r | |
94 | STATIC\r | |
95 | VOID \r | |
96 | PromoteMemoryResource (\r | |
97 | VOID\r | |
98 | );\r | |
99 | \r | |
100 | STATIC\r | |
101 | VOID\r | |
102 | CoreAddRange (\r | |
103 | IN EFI_MEMORY_TYPE Type,\r | |
104 | IN EFI_PHYSICAL_ADDRESS Start,\r | |
105 | IN EFI_PHYSICAL_ADDRESS End,\r | |
106 | IN UINT64 Attribute\r | |
107 | );\r | |
108 | \r | |
109 | STATIC\r | |
110 | VOID\r | |
111 | CoreFreeMemoryMapStack (\r | |
112 | VOID\r | |
113 | );\r | |
114 | \r | |
115 | STATIC\r | |
116 | EFI_STATUS\r | |
117 | CoreConvertPages (\r | |
118 | IN UINT64 Start,\r | |
119 | IN UINT64 NumberOfPages,\r | |
120 | IN EFI_MEMORY_TYPE NewType\r | |
121 | );\r | |
122 | \r | |
123 | STATIC\r | |
124 | VOID\r | |
125 | RemoveMemoryMapEntry (\r | |
126 | MEMORY_MAP *Entry\r | |
127 | );\r | |
128 | \r | |
129 | STATIC\r | |
130 | MEMORY_MAP *\r | |
131 | AllocateMemoryMapEntry (\r | |
132 | VOID\r | |
133 | );\r | |
134 | \r | |
135 | VOID\r | |
136 | CoreAcquireMemoryLock (\r | |
137 | VOID\r | |
138 | )\r | |
139 | /*++\r | |
140 | \r | |
141 | Routine Description:\r | |
142 | \r | |
143 | Enter critical section by gaining lock on gMemoryLock\r | |
144 | \r | |
145 | Arguments:\r | |
146 | \r | |
147 | None\r | |
148 | \r | |
149 | Returns:\r | |
150 | \r | |
151 | None\r | |
152 | \r | |
153 | --*/\r | |
154 | {\r | |
155 | CoreAcquireLock (&gMemoryLock);\r | |
156 | }\r | |
157 | \r | |
158 | \r | |
159 | VOID\r | |
160 | CoreReleaseMemoryLock (\r | |
161 | VOID\r | |
162 | )\r | |
163 | /*++\r | |
164 | \r | |
165 | Routine Description:\r | |
166 | \r | |
167 | Exit critical section by releasing lock on gMemoryLock\r | |
168 | \r | |
169 | Arguments:\r | |
170 | \r | |
171 | None\r | |
172 | \r | |
173 | Returns:\r | |
174 | \r | |
175 | None\r | |
176 | \r | |
177 | --*/\r | |
178 | {\r | |
179 | CoreReleaseLock (&gMemoryLock);\r | |
180 | }\r | |
181 | \r | |
182 | STATIC\r | |
183 | VOID\r | |
184 | PromoteMemoryResource (\r | |
185 | VOID\r | |
186 | )\r | |
187 | /*++\r | |
188 | \r | |
189 | Routine Description:\r | |
190 | \r | |
191 | Find untested but initialized memory regions in GCD map and convert them to be DXE allocatable.\r | |
192 | \r | |
193 | Arguments:\r | |
194 | \r | |
195 | None\r | |
196 | \r | |
197 | Returns:\r | |
198 | \r | |
199 | None\r | |
200 | \r | |
201 | --*/\r | |
202 | {\r | |
203 | LIST_ENTRY *Link;\r | |
204 | EFI_GCD_MAP_ENTRY *Entry;\r | |
205 | \r | |
206 | DEBUG ((EFI_D_ERROR | EFI_D_PAGE, "Promote the memory resource\n"));\r | |
207 | \r | |
208 | CoreAcquireGcdMemoryLock ();\r | |
209 | \r | |
210 | Link = mGcdMemorySpaceMap.ForwardLink;\r | |
211 | while (Link != &mGcdMemorySpaceMap) {\r | |
212 | \r | |
213 | Entry = CR (Link, EFI_GCD_MAP_ENTRY, Link, EFI_GCD_MAP_SIGNATURE);\r | |
214 | \r | |
215 | if (Entry->GcdMemoryType == EfiGcdMemoryTypeReserved &&\r | |
216 | Entry->EndAddress < EFI_MAX_ADDRESS &&\r | |
217 | (Entry->Capabilities & (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED)) ==\r | |
218 | (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED)) {\r | |
219 | //\r | |
220 | // Update the GCD map\r | |
221 | //\r | |
222 | Entry->GcdMemoryType = EfiGcdMemoryTypeSystemMemory;\r | |
223 | Entry->Capabilities |= EFI_MEMORY_TESTED;\r | |
224 | Entry->ImageHandle = gDxeCoreImageHandle;\r | |
225 | Entry->DeviceHandle = NULL;\r | |
226 | \r | |
227 | //\r | |
228 | // Add to allocable system memory resource\r | |
229 | // \r | |
230 | \r | |
231 | CoreAddRange (\r | |
232 | EfiConventionalMemory, \r | |
233 | Entry->BaseAddress, \r | |
234 | Entry->EndAddress, \r | |
235 | Entry->Capabilities & ~(EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED | EFI_MEMORY_RUNTIME)\r | |
236 | );\r | |
237 | CoreFreeMemoryMapStack ();\r | |
238 | \r | |
239 | }\r | |
240 | \r | |
241 | Link = Link->ForwardLink;\r | |
242 | }\r | |
243 | \r | |
244 | CoreReleaseGcdMemoryLock ();\r | |
245 | \r | |
246 | return;\r | |
247 | }\r | |
248 | \r | |
249 | VOID\r | |
250 | CoreAddMemoryDescriptor (\r | |
251 | IN EFI_MEMORY_TYPE Type,\r | |
252 | IN EFI_PHYSICAL_ADDRESS Start,\r | |
253 | IN UINT64 NumberOfPages,\r | |
254 | IN UINT64 Attribute\r | |
255 | )\r | |
256 | /*++\r | |
257 | \r | |
258 | Routine Description:\r | |
259 | \r | |
260 | Called to initialize the memory map and add descriptors to\r | |
261 | the current descriptor list.\r | |
262 | \r | |
263 | The first descriptor that is added must be general usable\r | |
264 | memory as the addition allocates heap.\r | |
265 | \r | |
266 | Arguments:\r | |
267 | \r | |
268 | Type - The type of memory to add\r | |
269 | \r | |
270 | Start - The starting address in the memory range\r | |
271 | Must be page aligned\r | |
272 | \r | |
273 | NumberOfPages - The number of pages in the range\r | |
274 | \r | |
275 | Attribute - Attributes of the memory to add\r | |
276 | \r | |
277 | Returns:\r | |
278 | \r | |
279 | None. The range is added to the memory map\r | |
280 | \r | |
281 | --*/\r | |
282 | {\r | |
283 | EFI_PHYSICAL_ADDRESS End;\r | |
284 | EFI_STATUS Status;\r | |
285 | UINTN Index;\r | |
286 | UINTN FreeIndex;\r | |
287 | \r | |
288 | if ((Start & EFI_PAGE_MASK) != 0) {\r | |
289 | return;\r | |
290 | }\r | |
291 | \r | |
292 | if (Type >= EfiMaxMemoryType && Type <= 0x7fffffff) {\r | |
293 | return;\r | |
294 | }\r | |
295 | \r | |
296 | CoreAcquireMemoryLock ();\r | |
297 | End = Start + LShiftU64 (NumberOfPages, EFI_PAGE_SHIFT) - 1;\r | |
298 | CoreAddRange (Type, Start, End, Attribute);\r | |
299 | CoreFreeMemoryMapStack ();\r | |
300 | CoreReleaseMemoryLock ();\r | |
301 | \r | |
302 | //\r | |
303 | // Check to see if the statistics for the different memory types have already been established\r | |
304 | //\r | |
305 | if (mMemoryTypeInformationInitialized) {\r | |
306 | return;\r | |
307 | }\r | |
308 | \r | |
309 | //\r | |
310 | // Loop through each memory type in the order specified by the gMemoryTypeInformation[] array\r | |
311 | //\r | |
312 | for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {\r | |
313 | //\r | |
314 | // Make sure the memory type in the gMemoryTypeInformation[] array is valid\r | |
315 | //\r | |
316 | Type = (EFI_MEMORY_TYPE) (gMemoryTypeInformation[Index].Type);\r | |
317 | if (Type < 0 || Type > EfiMaxMemoryType) {\r | |
318 | continue;\r | |
319 | }\r | |
320 | \r | |
321 | if (gMemoryTypeInformation[Index].NumberOfPages != 0) {\r | |
322 | //\r | |
323 | // Allocate pages for the current memory type from the top of available memory\r | |
324 | //\r | |
325 | Status = CoreAllocatePages (\r | |
326 | AllocateAnyPages,\r | |
327 | Type,\r | |
328 | gMemoryTypeInformation[Index].NumberOfPages,\r | |
329 | &mMemoryTypeStatistics[Type].BaseAddress\r | |
330 | );\r | |
331 | if (EFI_ERROR (Status)) {\r | |
332 | //\r | |
333 | // If an error occurs allocating the pages for the current memory type, then \r | |
334 | // free all the pages allocates for the previous memory types and return. This\r | |
335 | // operation with be retied when/if more memory is added to the system\r | |
336 | //\r | |
337 | for (FreeIndex = 0; FreeIndex < Index; FreeIndex++) {\r | |
338 | //\r | |
339 | // Make sure the memory type in the gMemoryTypeInformation[] array is valid\r | |
340 | //\r | |
341 | Type = (EFI_MEMORY_TYPE) (gMemoryTypeInformation[FreeIndex].Type);\r | |
342 | if (Type < 0 || Type > EfiMaxMemoryType) {\r | |
343 | continue;\r | |
344 | }\r | |
345 | \r | |
346 | if (gMemoryTypeInformation[FreeIndex].NumberOfPages != 0) {\r | |
347 | CoreFreePages (\r | |
348 | mMemoryTypeStatistics[Type].BaseAddress, \r | |
349 | gMemoryTypeInformation[FreeIndex].NumberOfPages\r | |
350 | );\r | |
351 | mMemoryTypeStatistics[Type].BaseAddress = 0;\r | |
352 | mMemoryTypeStatistics[Type].MaximumAddress = EFI_MAX_ADDRESS;\r | |
353 | }\r | |
354 | }\r | |
355 | return;\r | |
356 | }\r | |
357 | \r | |
358 | //\r | |
359 | // Compute the address at the top of the current statistics\r | |
360 | //\r | |
361 | mMemoryTypeStatistics[Type].MaximumAddress = \r | |
362 | mMemoryTypeStatistics[Type].BaseAddress + \r | |
363 | LShiftU64 (gMemoryTypeInformation[Index].NumberOfPages, EFI_PAGE_SHIFT) - 1;\r | |
364 | \r | |
365 | //\r | |
366 | // If the current base address is the lowest address so far, then update the default \r | |
367 | // maximum address\r | |
368 | //\r | |
369 | if (mMemoryTypeStatistics[Type].BaseAddress < mDefaultMaximumAddress) {\r | |
370 | mDefaultMaximumAddress = mMemoryTypeStatistics[Type].BaseAddress - 1;\r | |
371 | }\r | |
372 | }\r | |
373 | }\r | |
374 | \r | |
375 | //\r | |
376 | // There was enough system memory for all the the memory types were allocated. So,\r | |
377 | // those memory areas can be freed for future allocations, and all future memory\r | |
378 | // allocations can occur within their respective bins\r | |
379 | //\r | |
380 | for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {\r | |
381 | //\r | |
382 | // Make sure the memory type in the gMemoryTypeInformation[] array is valid\r | |
383 | //\r | |
384 | Type = (EFI_MEMORY_TYPE) (gMemoryTypeInformation[Index].Type);\r | |
385 | if (Type < 0 || Type > EfiMaxMemoryType) {\r | |
386 | continue;\r | |
387 | }\r | |
388 | \r | |
389 | if (gMemoryTypeInformation[Index].NumberOfPages != 0) {\r | |
390 | CoreFreePages (\r | |
391 | mMemoryTypeStatistics[Type].BaseAddress, \r | |
392 | gMemoryTypeInformation[Index].NumberOfPages\r | |
393 | );\r | |
394 | mMemoryTypeStatistics[Type].NumberOfPages = gMemoryTypeInformation[Index].NumberOfPages;\r | |
395 | gMemoryTypeInformation[Index].NumberOfPages = 0;\r | |
396 | }\r | |
397 | }\r | |
398 | \r | |
399 | //\r | |
400 | // If the number of pages reserved for a memory type is 0, then all allocations for that type\r | |
401 | // should be in the default range.\r | |
402 | //\r | |
403 | for (Type = (EFI_MEMORY_TYPE) 0; Type < EfiMaxMemoryType; Type++) {\r | |
404 | for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {\r | |
405 | if (Type == (EFI_MEMORY_TYPE)gMemoryTypeInformation[Index].Type) {\r | |
406 | mMemoryTypeStatistics[Type].InformationIndex = Index;\r | |
407 | }\r | |
408 | }\r | |
409 | mMemoryTypeStatistics[Type].CurrentNumberOfPages = 0;\r | |
410 | if (mMemoryTypeStatistics[Type].MaximumAddress == EFI_MAX_ADDRESS) {\r | |
411 | mMemoryTypeStatistics[Type].MaximumAddress = mDefaultMaximumAddress;\r | |
412 | }\r | |
413 | }\r | |
414 | \r | |
415 | mMemoryTypeInformationInitialized = TRUE;\r | |
416 | }\r | |
417 | \r | |
418 | \r | |
419 | STATIC\r | |
420 | VOID\r | |
421 | CoreAddRange (\r | |
422 | IN EFI_MEMORY_TYPE Type,\r | |
423 | IN EFI_PHYSICAL_ADDRESS Start,\r | |
424 | IN EFI_PHYSICAL_ADDRESS End,\r | |
425 | IN UINT64 Attribute\r | |
426 | )\r | |
427 | /*++\r | |
428 | \r | |
429 | Routine Description:\r | |
430 | \r | |
431 | Internal function. Adds a ranges to the memory map.\r | |
432 | The range must not already exist in the map.\r | |
433 | \r | |
434 | Arguments:\r | |
435 | \r | |
436 | Type - The type of memory range to add\r | |
437 | \r | |
438 | Start - The starting address in the memory range\r | |
439 | Must be paged aligned\r | |
440 | \r | |
441 | End - The last address in the range\r | |
442 | Must be the last byte of a page\r | |
443 | \r | |
444 | Attribute - The attributes of the memory range to add\r | |
445 | \r | |
446 | Returns:\r | |
447 | \r | |
448 | None. The range is added to the memory map\r | |
449 | \r | |
450 | --*/\r | |
451 | {\r | |
452 | LIST_ENTRY *Link;\r | |
453 | MEMORY_MAP *Entry;\r | |
454 | \r | |
455 | ASSERT ((Start & EFI_PAGE_MASK) == 0);\r | |
456 | ASSERT (End > Start) ;\r | |
457 | \r | |
458 | ASSERT_LOCKED (&gMemoryLock);\r | |
459 | \r | |
460 | DEBUG ((EFI_D_PAGE, "AddRange: %lx-%lx to %d\n", Start, End, Type));\r | |
461 | \r | |
462 | //\r | |
463 | // Memory map being altered so updated key\r | |
464 | //\r | |
465 | mMemoryMapKey += 1;\r | |
466 | \r | |
467 | //\r | |
468 | // UEFI 2.0 added an event group for notificaiton on memory map changes.\r | |
469 | // So we need to signal this Event Group every time the memory map changes.\r | |
470 | // If we are in EFI 1.10 compatability mode no event groups will be \r | |
471 | // found and nothing will happen we we call this function. These events\r | |
472 | // will get signaled but since a lock is held around the call to this \r | |
473 | // function the notificaiton events will only be called after this funciton\r | |
474 | // returns and the lock is released.\r | |
475 | //\r | |
476 | CoreNotifySignalList (&gEfiEventMemoryMapChangeGuid);\r | |
477 | \r | |
478 | //\r | |
479 | // Look for adjoining memory descriptor\r | |
480 | //\r | |
481 | \r | |
482 | // Two memory descriptors can only be merged if they have the same Type\r | |
483 | // and the same Attribute\r | |
484 | //\r | |
485 | \r | |
486 | Link = gMemoryMap.ForwardLink;\r | |
487 | while (Link != &gMemoryMap) {\r | |
488 | Entry = CR (Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);\r | |
489 | Link = Link->ForwardLink;\r | |
490 | \r | |
491 | if (Entry->Type != Type) {\r | |
492 | continue;\r | |
493 | }\r | |
494 | \r | |
495 | if (Entry->Attribute != Attribute) {\r | |
496 | continue;\r | |
497 | }\r | |
498 | \r | |
499 | if (Entry->End + 1 == Start) {\r | |
500 | \r | |
501 | Start = Entry->Start;\r | |
502 | RemoveMemoryMapEntry (Entry);\r | |
503 | \r | |
504 | } else if (Entry->Start == End + 1) {\r | |
505 | \r | |
506 | End = Entry->End;\r | |
507 | RemoveMemoryMapEntry (Entry);\r | |
508 | }\r | |
509 | }\r | |
510 | \r | |
511 | //\r | |
512 | // Add descriptor \r | |
513 | //\r | |
514 | \r | |
515 | mMapStack[mMapDepth].Signature = MEMORY_MAP_SIGNATURE;\r | |
516 | mMapStack[mMapDepth].FromPages = FALSE;\r | |
517 | mMapStack[mMapDepth].Type = Type;\r | |
518 | mMapStack[mMapDepth].Start = Start;\r | |
519 | mMapStack[mMapDepth].End = End;\r | |
520 | mMapStack[mMapDepth].VirtualStart = 0;\r | |
521 | mMapStack[mMapDepth].Attribute = Attribute;\r | |
522 | InsertTailList (&gMemoryMap, &mMapStack[mMapDepth].Link);\r | |
523 | \r | |
524 | mMapDepth += 1;\r | |
525 | ASSERT (mMapDepth < MAX_MAP_DEPTH);\r | |
526 | \r | |
527 | return ;\r | |
528 | }\r | |
529 | \r | |
530 | STATIC\r | |
531 | VOID\r | |
532 | CoreFreeMemoryMapStack (\r | |
533 | VOID\r | |
534 | )\r | |
535 | /*++\r | |
536 | \r | |
537 | Routine Description:\r | |
538 | \r | |
539 | Internal function. Moves any memory descriptors that are on the\r | |
540 | temporary descriptor stack to heap.\r | |
541 | \r | |
542 | Arguments:\r | |
543 | \r | |
544 | None\r | |
545 | \r | |
546 | Returns:\r | |
547 | \r | |
548 | None\r | |
549 | \r | |
550 | --*/\r | |
551 | {\r | |
552 | MEMORY_MAP *Entry;\r | |
553 | MEMORY_MAP *Entry2;\r | |
554 | LIST_ENTRY *Link2;\r | |
555 | \r | |
556 | ASSERT_LOCKED (&gMemoryLock);\r | |
557 | \r | |
558 | //\r | |
559 | // If already freeing the map stack, then return\r | |
560 | //\r | |
561 | if (mFreeMapStack) {\r | |
562 | return ;\r | |
563 | }\r | |
564 | \r | |
565 | //\r | |
566 | // Move the temporary memory descriptor stack into pool\r | |
567 | //\r | |
568 | mFreeMapStack += 1;\r | |
569 | \r | |
570 | while (mMapDepth) {\r | |
571 | //\r | |
572 | // Deque an memory map entry from mFreeMemoryMapEntryList \r | |
573 | //\r | |
574 | Entry = AllocateMemoryMapEntry ();\r | |
575 | \r | |
576 | ASSERT (Entry);\r | |
577 | \r | |
578 | //\r | |
579 | // Update to proper entry\r | |
580 | //\r | |
581 | mMapDepth -= 1;\r | |
582 | \r | |
583 | if (mMapStack[mMapDepth].Link.ForwardLink != NULL) {\r | |
584 | \r | |
585 | //\r | |
586 | // Move this entry to general memory\r | |
587 | //\r | |
588 | RemoveEntryList (&mMapStack[mMapDepth].Link);\r | |
589 | mMapStack[mMapDepth].Link.ForwardLink = NULL;\r | |
590 | \r | |
591 | CopyMem (Entry , &mMapStack[mMapDepth], sizeof (MEMORY_MAP));\r | |
592 | Entry->FromPages = TRUE;\r | |
593 | \r | |
594 | //\r | |
595 | // Find insertion location\r | |
596 | //\r | |
597 | for (Link2 = gMemoryMap.ForwardLink; Link2 != &gMemoryMap; Link2 = Link2->ForwardLink) {\r | |
598 | Entry2 = CR (Link2, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);\r | |
599 | if (Entry2->FromPages && Entry2->Start > Entry->Start) {\r | |
600 | break;\r | |
601 | }\r | |
602 | }\r | |
603 | \r | |
604 | InsertTailList (Link2, &Entry->Link);\r | |
605 | \r | |
606 | } else {\r | |
607 | // \r | |
608 | // This item of mMapStack[mMapDepth] has already been dequeued from gMemoryMap list,\r | |
609 | // so here no need to move it to memory.\r | |
610 | //\r | |
611 | InsertTailList (&mFreeMemoryMapEntryList, &Entry->Link);\r | |
612 | }\r | |
613 | }\r | |
614 | \r | |
615 | mFreeMapStack -= 1;\r | |
616 | }\r | |
617 | \r | |
618 | STATIC\r | |
619 | VOID\r | |
620 | RemoveMemoryMapEntry (\r | |
621 | MEMORY_MAP *Entry\r | |
622 | )\r | |
623 | /*++\r | |
624 | \r | |
625 | Routine Description:\r | |
626 | \r | |
627 | Internal function. Removes a descriptor entry.\r | |
628 | \r | |
629 | Arguments:\r | |
630 | \r | |
631 | Entry - The entry to remove\r | |
632 | \r | |
633 | Returns:\r | |
634 | \r | |
635 | None\r | |
636 | \r | |
637 | --*/\r | |
638 | {\r | |
639 | RemoveEntryList (&Entry->Link);\r | |
640 | Entry->Link.ForwardLink = NULL;\r | |
641 | \r | |
642 | if (Entry->FromPages) {\r | |
643 | //\r | |
644 | // Insert the free memory map descriptor to the end of mFreeMemoryMapEntryList\r | |
645 | //\r | |
646 | InsertTailList (&mFreeMemoryMapEntryList, &Entry->Link);\r | |
647 | }\r | |
648 | }\r | |
649 | \r | |
650 | STATIC\r | |
651 | MEMORY_MAP *\r | |
652 | AllocateMemoryMapEntry (\r | |
653 | VOID\r | |
654 | )\r | |
655 | /*++\r | |
656 | \r | |
657 | Routine Description:\r | |
658 | \r | |
659 | Internal function. Deque a descriptor entry from the mFreeMemoryMapEntryList.\r | |
660 | If the list is emtry, then allocate a new page to refuel the list. \r | |
661 | Please Note this algorithm to allocate the memory map descriptor has a property\r | |
662 | that the memory allocated for memory entries always grows, and will never really be freed \r | |
663 | For example, if the current boot uses 2000 memory map entries at the maximum point, but\r | |
664 | ends up with only 50 at the time the OS is booted, then the memory associated with the 1950 \r | |
665 | memory map entries is still allocated from EfiBootServicesMemory. \r | |
666 | \r | |
667 | Arguments:\r | |
668 | \r | |
669 | NONE\r | |
670 | \r | |
671 | Returns:\r | |
672 | \r | |
673 | The Memory map descriptor dequed from the mFreeMemoryMapEntryList\r | |
674 | \r | |
675 | --*/ \r | |
676 | {\r | |
677 | MEMORY_MAP* FreeDescriptorEntries;\r | |
678 | MEMORY_MAP* Entry;\r | |
679 | UINTN Index;\r | |
680 | \r | |
681 | if (IsListEmpty (&mFreeMemoryMapEntryList)) {\r | |
682 | // \r | |
683 | // The list is empty, to allocate one page to refuel the list\r | |
684 | //\r | |
685 | FreeDescriptorEntries = CoreAllocatePoolPages (EfiBootServicesData, EFI_SIZE_TO_PAGES(DEFAULT_PAGE_ALLOCATION), DEFAULT_PAGE_ALLOCATION);\r | |
686 | if(FreeDescriptorEntries != NULL) {\r | |
687 | //\r | |
688 | // Enque the free memmory map entries into the list\r | |
689 | //\r | |
690 | for (Index = 0; Index< DEFAULT_PAGE_ALLOCATION / sizeof(MEMORY_MAP); Index++) {\r | |
691 | FreeDescriptorEntries[Index].Signature = MEMORY_MAP_SIGNATURE;\r | |
692 | InsertTailList (&mFreeMemoryMapEntryList, &FreeDescriptorEntries[Index].Link);\r | |
693 | } \r | |
694 | } else {\r | |
695 | return NULL;\r | |
696 | }\r | |
697 | }\r | |
698 | //\r | |
699 | // dequeue the first descriptor from the list\r | |
700 | //\r | |
701 | Entry = CR (mFreeMemoryMapEntryList.ForwardLink, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);\r | |
702 | RemoveEntryList (&Entry->Link);\r | |
703 | \r | |
704 | return Entry;\r | |
705 | } \r | |
706 | \r | |
707 | STATIC\r | |
708 | EFI_STATUS\r | |
709 | CoreConvertPages (\r | |
710 | IN UINT64 Start,\r | |
711 | IN UINT64 NumberOfPages,\r | |
712 | IN EFI_MEMORY_TYPE NewType\r | |
713 | )\r | |
714 | /*++\r | |
715 | \r | |
716 | Routine Description:\r | |
717 | \r | |
718 | Internal function. Converts a memory range to the specified type.\r | |
719 | The range must exist in the memory map.\r | |
720 | \r | |
721 | Arguments:\r | |
722 | \r | |
723 | Start - The first address of the range\r | |
724 | Must be page aligned\r | |
725 | \r | |
726 | NumberOfPages - The number of pages to convert\r | |
727 | \r | |
728 | NewType - The new type for the memory range\r | |
729 | \r | |
730 | Returns:\r | |
731 | \r | |
732 | EFI_INVALID_PARAMETER - Invalid parameter\r | |
733 | \r | |
734 | EFI_NOT_FOUND - Could not find a descriptor cover the specified range \r | |
735 | or convertion not allowed.\r | |
736 | \r | |
737 | EFI_SUCCESS - Successfully converts the memory range to the specified type.\r | |
738 | \r | |
739 | --*/\r | |
740 | {\r | |
741 | \r | |
742 | UINT64 NumberOfBytes;\r | |
743 | UINT64 End;\r | |
744 | UINT64 RangeEnd;\r | |
745 | UINT64 Attribute;\r | |
746 | LIST_ENTRY *Link;\r | |
747 | MEMORY_MAP *Entry;\r | |
748 | \r | |
749 | Entry = NULL;\r | |
750 | NumberOfBytes = LShiftU64 (NumberOfPages, EFI_PAGE_SHIFT);\r | |
751 | End = Start + NumberOfBytes - 1;\r | |
752 | \r | |
753 | ASSERT (NumberOfPages);\r | |
754 | ASSERT ((Start & EFI_PAGE_MASK) == 0);\r | |
755 | ASSERT (End > Start) ;\r | |
756 | ASSERT_LOCKED (&gMemoryLock);\r | |
757 | \r | |
758 | if (NumberOfPages == 0 || (Start & EFI_PAGE_MASK ) || (Start > (Start + NumberOfBytes))) {\r | |
759 | return EFI_INVALID_PARAMETER;\r | |
760 | }\r | |
761 | \r | |
762 | //\r | |
763 | // Convert the entire range\r | |
764 | //\r | |
765 | \r | |
766 | while (Start < End) {\r | |
767 | \r | |
768 | //\r | |
769 | // Find the entry that the covers the range\r | |
770 | //\r | |
771 | for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {\r | |
772 | Entry = CR (Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);\r | |
773 | \r | |
774 | if (Entry->Start <= Start && Entry->End > Start) {\r | |
775 | break;\r | |
776 | }\r | |
777 | }\r | |
778 | \r | |
779 | if (Link == &gMemoryMap) {\r | |
780 | DEBUG ((EFI_D_ERROR | EFI_D_PAGE, "ConvertPages: failed to find range %lx - %lx\n", Start, End));\r | |
781 | return EFI_NOT_FOUND;\r | |
782 | }\r | |
783 | \r | |
784 | //\r | |
785 | // Convert range to the end, or to the end of the descriptor\r | |
786 | // if that's all we've got\r | |
787 | //\r | |
788 | RangeEnd = End;\r | |
789 | if (Entry->End < End) {\r | |
790 | RangeEnd = Entry->End;\r | |
791 | }\r | |
792 | \r | |
793 | DEBUG ((EFI_D_PAGE, "ConvertRange: %lx-%lx to %d\n", Start, RangeEnd, NewType));\r | |
794 | \r | |
795 | //\r | |
796 | // Debug code - verify conversion is allowed\r | |
797 | //\r | |
798 | if (!(NewType == EfiConventionalMemory ? 1 : 0) ^ (Entry->Type == EfiConventionalMemory ? 1 : 0)) {\r | |
799 | DEBUG ((EFI_D_ERROR , "ConvertPages: Incompatible memory types\n"));\r | |
800 | return EFI_NOT_FOUND;\r | |
801 | } \r | |
802 | \r | |
803 | //\r | |
804 | // Update counters for the number of pages allocated to each memory type\r | |
805 | //\r | |
806 | if (Entry->Type >= 0 && Entry->Type < EfiMaxMemoryType) {\r | |
807 | if (Start >= mMemoryTypeStatistics[Entry->Type].BaseAddress && \r | |
808 | Start <= mMemoryTypeStatistics[Entry->Type].MaximumAddress) {\r | |
809 | if (NumberOfPages > mMemoryTypeStatistics[Entry->Type].CurrentNumberOfPages) {\r | |
810 | mMemoryTypeStatistics[Entry->Type].CurrentNumberOfPages = 0;\r | |
811 | } else {\r | |
812 | mMemoryTypeStatistics[Entry->Type].CurrentNumberOfPages -= NumberOfPages;\r | |
813 | }\r | |
814 | }\r | |
815 | }\r | |
816 | \r | |
817 | if (NewType >= 0 && NewType < EfiMaxMemoryType) {\r | |
818 | if (Start >= mMemoryTypeStatistics[NewType].BaseAddress && Start <= mMemoryTypeStatistics[NewType].MaximumAddress) {\r | |
819 | mMemoryTypeStatistics[NewType].CurrentNumberOfPages += NumberOfPages;\r | |
820 | if (mMemoryTypeStatistics[NewType].CurrentNumberOfPages > \r | |
821 | gMemoryTypeInformation[mMemoryTypeStatistics[NewType].InformationIndex].NumberOfPages) {\r | |
822 | gMemoryTypeInformation[mMemoryTypeStatistics[NewType].InformationIndex].NumberOfPages = (UINT32)mMemoryTypeStatistics[NewType].CurrentNumberOfPages;\r | |
823 | }\r | |
824 | }\r | |
825 | }\r | |
826 | \r | |
827 | //\r | |
828 | // Pull range out of descriptor\r | |
829 | //\r | |
830 | if (Entry->Start == Start) {\r | |
831 | \r | |
832 | //\r | |
833 | // Clip start\r | |
834 | //\r | |
835 | Entry->Start = RangeEnd + 1;\r | |
836 | \r | |
837 | } else if (Entry->End == RangeEnd) {\r | |
838 | \r | |
839 | //\r | |
840 | // Clip end\r | |
841 | //\r | |
842 | Entry->End = Start - 1;\r | |
843 | \r | |
844 | } else {\r | |
845 | \r | |
846 | //\r | |
847 | // Pull it out of the center, clip current\r | |
848 | //\r | |
849 | \r | |
850 | //\r | |
851 | // Add a new one\r | |
852 | //\r | |
853 | mMapStack[mMapDepth].Signature = MEMORY_MAP_SIGNATURE;\r | |
854 | mMapStack[mMapDepth].FromPages = FALSE;\r | |
855 | mMapStack[mMapDepth].Type = Entry->Type;\r | |
856 | mMapStack[mMapDepth].Start = RangeEnd+1;\r | |
857 | mMapStack[mMapDepth].End = Entry->End;\r | |
858 | \r | |
859 | //\r | |
860 | // Inherit Attribute from the Memory Descriptor that is being clipped\r | |
861 | //\r | |
862 | mMapStack[mMapDepth].Attribute = Entry->Attribute;\r | |
863 | \r | |
864 | Entry->End = Start - 1;\r | |
865 | ASSERT (Entry->Start < Entry->End);\r | |
866 | \r | |
867 | Entry = &mMapStack[mMapDepth];\r | |
868 | InsertTailList (&gMemoryMap, &Entry->Link);\r | |
869 | \r | |
870 | mMapDepth += 1;\r | |
871 | ASSERT (mMapDepth < MAX_MAP_DEPTH);\r | |
872 | }\r | |
873 | \r | |
874 | //\r | |
875 | // The new range inherits the same Attribute as the Entry \r | |
876 | //it is being cut out of\r | |
877 | //\r | |
878 | Attribute = Entry->Attribute;\r | |
879 | \r | |
880 | //\r | |
881 | // If the descriptor is empty, then remove it from the map\r | |
882 | //\r | |
883 | if (Entry->Start == Entry->End + 1) {\r | |
884 | RemoveMemoryMapEntry (Entry);\r | |
885 | Entry = NULL;\r | |
886 | }\r | |
887 | \r | |
888 | //\r | |
889 | // Add our new range in\r | |
890 | //\r | |
891 | CoreAddRange (NewType, Start, RangeEnd, Attribute);\r | |
892 | \r | |
893 | //\r | |
894 | // Move any map descriptor stack to general pool\r | |
895 | //\r | |
896 | CoreFreeMemoryMapStack ();\r | |
897 | \r | |
898 | //\r | |
899 | // Bump the starting address, and convert the next range\r | |
900 | //\r | |
901 | Start = RangeEnd + 1;\r | |
902 | }\r | |
903 | \r | |
904 | //\r | |
905 | // Converted the whole range, done\r | |
906 | //\r | |
907 | \r | |
908 | return EFI_SUCCESS;\r | |
909 | }\r | |
910 | \r | |
911 | \r | |
912 | STATIC\r | |
913 | UINT64\r | |
914 | CoreFindFreePagesI (\r | |
915 | IN UINT64 MaxAddress,\r | |
916 | IN UINT64 NumberOfPages,\r | |
917 | IN EFI_MEMORY_TYPE NewType,\r | |
918 | IN UINTN Alignment\r | |
919 | )\r | |
920 | /*++\r | |
921 | \r | |
922 | Routine Description:\r | |
923 | \r | |
924 | Internal function. Finds a consecutive free page range below\r | |
925 | the requested address.\r | |
926 | \r | |
927 | Arguments:\r | |
928 | \r | |
929 | MaxAddress - The address that the range must be below\r | |
930 | \r | |
931 | NumberOfPages - Number of pages needed\r | |
932 | \r | |
933 | NewType - The type of memory the range is going to be turned into\r | |
934 | \r | |
935 | Alignment - Bits to align with\r | |
936 | \r | |
937 | Returns:\r | |
938 | \r | |
939 | The base address of the range, or 0 if the range was not found\r | |
940 | \r | |
941 | --*/\r | |
942 | {\r | |
943 | UINT64 NumberOfBytes;\r | |
944 | UINT64 Target;\r | |
945 | UINT64 DescStart;\r | |
946 | UINT64 DescEnd;\r | |
947 | UINT64 DescNumberOfBytes;\r | |
948 | LIST_ENTRY *Link;\r | |
949 | MEMORY_MAP *Entry;\r | |
950 | \r | |
951 | if ((MaxAddress < EFI_PAGE_MASK) ||(NumberOfPages == 0)) {\r | |
952 | return 0;\r | |
953 | }\r | |
954 | \r | |
955 | if ((MaxAddress & EFI_PAGE_MASK) != EFI_PAGE_MASK) {\r | |
956 | \r | |
957 | //\r | |
958 | // If MaxAddress is not aligned to the end of a page\r | |
959 | //\r | |
960 | \r | |
961 | //\r | |
962 | // Change MaxAddress to be 1 page lower\r | |
963 | //\r | |
964 | MaxAddress -= (EFI_PAGE_MASK + 1);\r | |
965 | \r | |
966 | //\r | |
967 | // Set MaxAddress to a page boundary\r | |
968 | //\r | |
969 | MaxAddress &= ~EFI_PAGE_MASK;\r | |
970 | \r | |
971 | //\r | |
972 | // Set MaxAddress to end of the page\r | |
973 | //\r | |
974 | MaxAddress |= EFI_PAGE_MASK;\r | |
975 | }\r | |
976 | \r | |
977 | NumberOfBytes = LShiftU64 (NumberOfPages, EFI_PAGE_SHIFT);\r | |
978 | Target = 0;\r | |
979 | \r | |
980 | for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {\r | |
981 | Entry = CR (Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);\r | |
982 | \r | |
983 | //\r | |
984 | // If it's not a free entry, don't bother with it\r | |
985 | //\r | |
986 | if (Entry->Type != EfiConventionalMemory) {\r | |
987 | continue;\r | |
988 | }\r | |
989 | \r | |
990 | DescStart = Entry->Start;\r | |
991 | DescEnd = Entry->End;\r | |
992 | \r | |
993 | //\r | |
994 | // If desc is past max allowed address, skip it\r | |
995 | //\r | |
996 | if (DescStart >= MaxAddress) {\r | |
997 | continue;\r | |
998 | }\r | |
999 | \r | |
1000 | //\r | |
1001 | // If desc ends past max allowed address, clip the end\r | |
1002 | //\r | |
1003 | if (DescEnd >= MaxAddress) {\r | |
1004 | DescEnd = MaxAddress;\r | |
1005 | }\r | |
1006 | \r | |
1007 | DescEnd = ((DescEnd + 1) & (~(Alignment - 1))) - 1;\r | |
1008 | \r | |
1009 | //\r | |
1010 | // Compute the number of bytes we can used from this \r | |
1011 | // descriptor, and see it's enough to satisfy the request\r | |
1012 | //\r | |
1013 | DescNumberOfBytes = DescEnd - DescStart + 1;\r | |
1014 | \r | |
1015 | if (DescNumberOfBytes >= NumberOfBytes) {\r | |
1016 | \r | |
1017 | //\r | |
1018 | // If this is the best match so far remember it\r | |
1019 | //\r | |
1020 | if (DescEnd > Target) {\r | |
1021 | Target = DescEnd;\r | |
1022 | }\r | |
1023 | }\r | |
1024 | } \r | |
1025 | \r | |
1026 | //\r | |
1027 | // If this is a grow down, adjust target to be the allocation base\r | |
1028 | //\r | |
1029 | Target -= NumberOfBytes - 1;\r | |
1030 | \r | |
1031 | //\r | |
1032 | // If we didn't find a match, return 0\r | |
1033 | //\r | |
1034 | if ((Target & EFI_PAGE_MASK) != 0) {\r | |
1035 | return 0;\r | |
1036 | }\r | |
1037 | \r | |
1038 | return Target;\r | |
1039 | }\r | |
1040 | \r | |
1041 | STATIC\r | |
1042 | UINT64\r | |
1043 | FindFreePages (\r | |
1044 | IN UINT64 MaxAddress,\r | |
1045 | IN UINT64 NoPages,\r | |
1046 | IN EFI_MEMORY_TYPE NewType,\r | |
1047 | IN UINTN Alignment\r | |
1048 | )\r | |
1049 | /*++\r | |
1050 | \r | |
1051 | Routine Description:\r | |
1052 | \r | |
1053 | Internal function. Finds a consecutive free page range below\r | |
1054 | the requested address\r | |
1055 | \r | |
1056 | Arguments:\r | |
1057 | \r | |
1058 | MaxAddress - The address that the range must be below\r | |
1059 | \r | |
1060 | NoPages - Number of pages needed\r | |
1061 | \r | |
1062 | NewType - The type of memory the range is going to be turned into\r | |
1063 | \r | |
1064 | Alignment - Bits to align with\r | |
1065 | \r | |
1066 | Returns:\r | |
1067 | \r | |
1068 | The base address of the range, or 0 if the range was not found.\r | |
1069 | \r | |
1070 | --*/\r | |
1071 | {\r | |
1072 | UINT64 NewMaxAddress;\r | |
1073 | UINT64 Start;\r | |
1074 | \r | |
1075 | NewMaxAddress = MaxAddress;\r | |
1076 | \r | |
1077 | if (NewType >= 0 && NewType < EfiMaxMemoryType && NewMaxAddress >= mMemoryTypeStatistics[NewType].MaximumAddress) {\r | |
1078 | NewMaxAddress = mMemoryTypeStatistics[NewType].MaximumAddress;\r | |
1079 | } else {\r | |
1080 | if (NewMaxAddress > mDefaultMaximumAddress) {\r | |
1081 | NewMaxAddress = mDefaultMaximumAddress;\r | |
1082 | }\r | |
1083 | }\r | |
1084 | \r | |
1085 | Start = CoreFindFreePagesI (NewMaxAddress, NoPages, NewType, Alignment);\r | |
1086 | if (!Start) {\r | |
1087 | Start = CoreFindFreePagesI (MaxAddress, NoPages, NewType, Alignment);\r | |
1088 | if (!Start) {\r | |
1089 | //\r | |
1090 | // Here means there may be no enough memory to use, so try to go through\r | |
1091 | // all the memory descript to promote the untested memory directly\r | |
1092 | //\r | |
1093 | PromoteMemoryResource ();\r | |
1094 | \r | |
1095 | //\r | |
1096 | // Allocate memory again after the memory resource re-arranged\r | |
1097 | //\r | |
1098 | Start = CoreFindFreePagesI (MaxAddress, NoPages, NewType, Alignment);\r | |
1099 | }\r | |
1100 | }\r | |
1101 | \r | |
1102 | return Start;\r | |
1103 | }\r | |
1104 | \r | |
1105 | \r | |
1106 | EFI_STATUS\r | |
1107 | EFIAPI\r | |
1108 | CoreAllocatePages (\r | |
1109 | IN EFI_ALLOCATE_TYPE Type,\r | |
1110 | IN EFI_MEMORY_TYPE MemoryType,\r | |
1111 | IN UINTN NumberOfPages,\r | |
1112 | IN OUT EFI_PHYSICAL_ADDRESS *Memory\r | |
1113 | )\r | |
1114 | /*++\r | |
1115 | \r | |
1116 | Routine Description:\r | |
1117 | \r | |
1118 | Allocates pages from the memory map.\r | |
1119 | \r | |
1120 | Arguments:\r | |
1121 | \r | |
1122 | Type - The type of allocation to perform\r | |
1123 | \r | |
1124 | MemoryType - The type of memory to turn the allocated pages into\r | |
1125 | \r | |
1126 | NumberOfPages - The number of pages to allocate\r | |
1127 | \r | |
1128 | Memory - A pointer to receive the base allocated memory address\r | |
1129 | \r | |
1130 | Returns:\r | |
1131 | \r | |
1132 | Status. On success, Memory is filled in with the base address allocated\r | |
1133 | \r | |
1134 | EFI_INVALID_PARAMETER - Parameters violate checking rules defined in spec.\r | |
1135 | \r | |
1136 | EFI_NOT_FOUND - Could not allocate pages match the requirement.\r | |
1137 | \r | |
1138 | EFI_OUT_OF_RESOURCES - No enough pages to allocate.\r | |
1139 | \r | |
1140 | EFI_SUCCESS - Pages successfully allocated.\r | |
1141 | \r | |
1142 | --*/\r | |
1143 | {\r | |
1144 | EFI_STATUS Status;\r | |
1145 | UINT64 Start;\r | |
1146 | UINT64 MaxAddress;\r | |
1147 | UINTN Alignment;\r | |
1148 | \r | |
1149 | if (Type < AllocateAnyPages || Type >= (UINTN) MaxAllocateType) {\r | |
1150 | return EFI_INVALID_PARAMETER;\r | |
1151 | }\r | |
1152 | \r | |
1153 | if ((MemoryType >= EfiMaxMemoryType && MemoryType <= 0x7fffffff) ||\r | |
1154 | MemoryType == EfiConventionalMemory) {\r | |
1155 | return EFI_INVALID_PARAMETER;\r | |
1156 | }\r | |
1157 | \r | |
1158 | Alignment = EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT;\r | |
1159 | \r | |
1160 | if (MemoryType == EfiACPIReclaimMemory ||\r | |
1161 | MemoryType == EfiACPIMemoryNVS ||\r | |
1162 | MemoryType == EfiRuntimeServicesCode ||\r | |
1163 | MemoryType == EfiRuntimeServicesData) {\r | |
1164 | \r | |
1165 | Alignment = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;\r | |
1166 | }\r | |
1167 | \r | |
1168 | if (Type == AllocateAddress) {\r | |
1169 | if ((*Memory & (Alignment - 1)) != 0) {\r | |
1170 | return EFI_NOT_FOUND;\r | |
1171 | }\r | |
1172 | }\r | |
1173 | \r | |
1174 | NumberOfPages += EFI_SIZE_TO_PAGES (Alignment) - 1;\r | |
1175 | NumberOfPages &= ~(EFI_SIZE_TO_PAGES (Alignment) - 1);\r | |
1176 | \r | |
1177 | //\r | |
1178 | // If this is for below a particular address, then \r | |
1179 | //\r | |
1180 | Start = *Memory;\r | |
1181 | \r | |
1182 | //\r | |
1183 | // The max address is the max natively addressable address for the processor\r | |
1184 | //\r | |
1185 | MaxAddress = EFI_MAX_ADDRESS;\r | |
1186 | \r | |
1187 | if (Type == AllocateMaxAddress) {\r | |
1188 | MaxAddress = Start;\r | |
1189 | }\r | |
1190 | \r | |
1191 | CoreAcquireMemoryLock ();\r | |
1192 | \r | |
1193 | //\r | |
1194 | // If not a specific address, then find an address to allocate\r | |
1195 | //\r | |
1196 | if (Type != AllocateAddress) {\r | |
1197 | Start = FindFreePages (MaxAddress, NumberOfPages, MemoryType, Alignment);\r | |
1198 | if (Start == 0) {\r | |
1199 | Status = EFI_OUT_OF_RESOURCES;\r | |
1200 | goto Done;\r | |
1201 | }\r | |
1202 | }\r | |
1203 | \r | |
1204 | //\r | |
1205 | // Convert pages from FreeMemory to the requested type\r | |
1206 | //\r | |
1207 | Status = CoreConvertPages (Start, NumberOfPages, MemoryType);\r | |
1208 | \r | |
1209 | Done:\r | |
1210 | CoreReleaseMemoryLock ();\r | |
1211 | \r | |
1212 | if (!EFI_ERROR (Status)) {\r | |
1213 | *Memory = Start;\r | |
1214 | }\r | |
1215 | \r | |
1216 | return Status;\r | |
1217 | }\r | |
1218 | \r | |
1219 | \r | |
1220 | \r | |
1221 | \r | |
1222 | EFI_STATUS \r | |
1223 | EFIAPI\r | |
1224 | CoreFreePages (\r | |
1225 | IN EFI_PHYSICAL_ADDRESS Memory,\r | |
1226 | IN UINTN NumberOfPages\r | |
1227 | )\r | |
1228 | /*++\r | |
1229 | \r | |
1230 | Routine Description:\r | |
1231 | \r | |
1232 | Frees previous allocated pages.\r | |
1233 | \r | |
1234 | Arguments:\r | |
1235 | \r | |
1236 | Memory - Base address of memory being freed\r | |
1237 | \r | |
1238 | NumberOfPages - The number of pages to free\r | |
1239 | \r | |
1240 | Returns:\r | |
1241 | \r | |
1242 | EFI_NOT_FOUND - Could not find the entry that covers the range\r | |
1243 | \r | |
1244 | EFI_INVALID_PARAMETER - Address not aligned\r | |
1245 | \r | |
1246 | EFI_SUCCESS -Pages successfully freed.\r | |
1247 | \r | |
1248 | --*/\r | |
1249 | {\r | |
1250 | EFI_STATUS Status;\r | |
1251 | LIST_ENTRY *Link;\r | |
1252 | MEMORY_MAP *Entry;\r | |
1253 | UINTN Alignment;\r | |
1254 | \r | |
1255 | //\r | |
1256 | // Free the range\r | |
1257 | //\r | |
1258 | CoreAcquireMemoryLock ();\r | |
1259 | \r | |
1260 | //\r | |
1261 | // Find the entry that the covers the range\r | |
1262 | //\r | |
1263 | Entry = NULL;\r | |
1264 | for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {\r | |
1265 | Entry = CR(Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);\r | |
1266 | if (Entry->Start <= Memory && Entry->End > Memory) {\r | |
1267 | break;\r | |
1268 | }\r | |
1269 | }\r | |
1270 | if (Link == &gMemoryMap) {\r | |
1271 | CoreReleaseMemoryLock ();\r | |
1272 | return EFI_NOT_FOUND;\r | |
1273 | }\r | |
1274 | \r | |
1275 | Alignment = EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT;\r | |
1276 | \r | |
1277 | if (Entry->Type == EfiACPIReclaimMemory ||\r | |
1278 | Entry->Type == EfiACPIMemoryNVS ||\r | |
1279 | Entry->Type == EfiRuntimeServicesCode ||\r | |
1280 | Entry->Type == EfiRuntimeServicesData) {\r | |
1281 | \r | |
1282 | Alignment = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;\r | |
1283 | \r | |
1284 | }\r | |
1285 | \r | |
1286 | if ((Memory & (Alignment - 1)) != 0) {\r | |
1287 | CoreReleaseMemoryLock ();\r | |
1288 | return EFI_INVALID_PARAMETER;\r | |
1289 | }\r | |
1290 | \r | |
1291 | NumberOfPages += EFI_SIZE_TO_PAGES (Alignment) - 1;\r | |
1292 | NumberOfPages &= ~(EFI_SIZE_TO_PAGES (Alignment) - 1);\r | |
1293 | \r | |
1294 | Status = CoreConvertPages (Memory, NumberOfPages, EfiConventionalMemory);\r | |
1295 | \r | |
1296 | CoreReleaseMemoryLock ();\r | |
1297 | \r | |
1298 | if (EFI_ERROR (Status)) {\r | |
1299 | return Status;\r | |
1300 | }\r | |
1301 | \r | |
1302 | //\r | |
1303 | // Destroy the contents\r | |
1304 | //\r | |
1305 | if (Memory < EFI_MAX_ADDRESS) {\r | |
1306 | DEBUG_CLEAR_MEMORY ((VOID *)(UINTN)Memory, NumberOfPages << EFI_PAGE_SHIFT);\r | |
1307 | }\r | |
1308 | \r | |
1309 | return Status;\r | |
1310 | }\r | |
1311 | \r | |
1312 | \r | |
1313 | \r | |
1314 | EFI_STATUS\r | |
1315 | EFIAPI\r | |
1316 | CoreGetMemoryMap (\r | |
1317 | IN OUT UINTN *MemoryMapSize,\r | |
1318 | IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,\r | |
1319 | OUT UINTN *MapKey,\r | |
1320 | OUT UINTN *DescriptorSize,\r | |
1321 | OUT UINT32 *DescriptorVersion\r | |
1322 | )\r | |
1323 | /*++\r | |
1324 | \r | |
1325 | Routine Description:\r | |
1326 | \r | |
1327 | This function returns a copy of the current memory map. The map is an array of \r | |
1328 | memory descriptors, each of which describes a contiguous block of memory.\r | |
1329 | \r | |
1330 | Arguments:\r | |
1331 | \r | |
1332 | MemoryMapSize - A pointer to the size, in bytes, of the MemoryMap buffer. On\r | |
1333 | input, this is the size of the buffer allocated by the caller. \r | |
1334 | On output, it is the size of the buffer returned by the firmware \r | |
1335 | if the buffer was large enough, or the size of the buffer needed \r | |
1336 | to contain the map if the buffer was too small.\r | |
1337 | MemoryMap - A pointer to the buffer in which firmware places the current memory map.\r | |
1338 | MapKey - A pointer to the location in which firmware returns the key for the\r | |
1339 | current memory map.\r | |
1340 | DescriptorSize - A pointer to the location in which firmware returns the size, in\r | |
1341 | bytes, of an individual EFI_MEMORY_DESCRIPTOR.\r | |
1342 | DescriptorVersion - A pointer to the location in which firmware returns the version\r | |
1343 | number associated with the EFI_MEMORY_DESCRIPTOR.\r | |
1344 | \r | |
1345 | Returns:\r | |
1346 | \r | |
1347 | EFI_SUCCESS - The memory map was returned in the MemoryMap buffer. \r | |
1348 | EFI_BUFFER_TOO_SMALL - The MemoryMap buffer was too small. The current buffer size\r | |
1349 | needed to hold the memory map is returned in MemoryMapSize.\r | |
1350 | EFI_INVALID_PARAMETER - One of the parameters has an invalid value. \r | |
1351 | \r | |
1352 | --*/\r | |
1353 | {\r | |
1354 | EFI_STATUS Status;\r | |
1355 | UINTN Size; \r | |
1356 | UINTN BufferSize; \r | |
1357 | UINTN NumberOfRuntimeEntries;\r | |
1358 | LIST_ENTRY *Link;\r | |
1359 | MEMORY_MAP *Entry; \r | |
1360 | EFI_GCD_MAP_ENTRY *GcdMapEntry; \r | |
1361 | EFI_MEMORY_TYPE Type;\r | |
1362 | \r | |
1363 | //\r | |
1364 | // Make sure the parameters are valid\r | |
1365 | //\r | |
1366 | if (MemoryMapSize == NULL) {\r | |
1367 | return EFI_INVALID_PARAMETER;\r | |
1368 | }\r | |
1369 | \r | |
1370 | CoreAcquireGcdMemoryLock ();\r | |
1371 | \r | |
1372 | //\r | |
1373 | // Count the number of Reserved and MMIO entries that are marked for runtime use\r | |
1374 | //\r | |
1375 | NumberOfRuntimeEntries = 0;\r | |
1376 | for (Link = mGcdMemorySpaceMap.ForwardLink; Link != &mGcdMemorySpaceMap; Link = Link->ForwardLink) {\r | |
1377 | GcdMapEntry = CR (Link, EFI_GCD_MAP_ENTRY, Link, EFI_GCD_MAP_SIGNATURE);\r | |
1378 | if ((GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) ||\r | |
1379 | (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo)) {\r | |
1380 | if ((GcdMapEntry->Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {\r | |
1381 | NumberOfRuntimeEntries++;\r | |
1382 | }\r | |
1383 | }\r | |
1384 | }\r | |
1385 | \r | |
1386 | Size = sizeof (EFI_MEMORY_DESCRIPTOR);\r | |
1387 | \r | |
1388 | //\r | |
1389 | // Make sure Size != sizeof(EFI_MEMORY_DESCRIPTOR). This will\r | |
1390 | // prevent people from having pointer math bugs in their code.\r | |
1391 | // now you have to use *DescriptorSize to make things work.\r | |
1392 | //\r | |
1393 | Size += sizeof(UINT64) - (Size % sizeof (UINT64));\r | |
1394 | \r | |
1395 | if (DescriptorSize != NULL) {\r | |
1396 | *DescriptorSize = Size;\r | |
1397 | }\r | |
1398 | \r | |
1399 | if (DescriptorVersion != NULL) {\r | |
1400 | *DescriptorVersion = EFI_MEMORY_DESCRIPTOR_VERSION;\r | |
1401 | }\r | |
1402 | \r | |
1403 | CoreAcquireMemoryLock ();\r | |
1404 | \r | |
1405 | //\r | |
1406 | // Compute the buffer size needed to fit the entire map\r | |
1407 | //\r | |
1408 | BufferSize = Size * NumberOfRuntimeEntries;\r | |
1409 | for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {\r | |
1410 | BufferSize += Size;\r | |
1411 | }\r | |
1412 | \r | |
1413 | if (*MemoryMapSize < BufferSize) {\r | |
1414 | Status = EFI_BUFFER_TOO_SMALL;\r | |
1415 | goto Done;\r | |
1416 | }\r | |
1417 | \r | |
1418 | if (MemoryMap == NULL) {\r | |
1419 | Status = EFI_INVALID_PARAMETER;\r | |
1420 | goto Done;\r | |
1421 | }\r | |
1422 | \r | |
1423 | //\r | |
1424 | // Build the map\r | |
1425 | //\r | |
1426 | ZeroMem (MemoryMap, BufferSize);\r | |
1427 | for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {\r | |
1428 | Entry = CR (Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);\r | |
1429 | ASSERT (Entry->VirtualStart == 0);\r | |
1430 | \r | |
1431 | //\r | |
1432 | // Convert internal map into an EFI_MEMORY_DESCRIPTOR\r | |
1433 | //\r | |
1434 | MemoryMap->Type = Entry->Type;\r | |
1435 | MemoryMap->PhysicalStart = Entry->Start;\r | |
1436 | MemoryMap->VirtualStart = Entry->VirtualStart;\r | |
1437 | MemoryMap->NumberOfPages = RShiftU64 (Entry->End - Entry->Start + 1, EFI_PAGE_SHIFT);\r | |
1438 | //\r | |
1439 | // If the memory type is EfiConventionalMemory, then determine if the range is part of a\r | |
1440 | // memory type bin and needs to be converted to the same memory type as the rest of the \r | |
1441 | // memory type bin in order to minimize EFI Memory Map changes across reboots. This \r | |
1442 | // improves the chances for a successful S4 resume in the presence of minor page allocation\r | |
1443 | // differences across reboots.\r | |
1444 | //\r | |
1445 | if (MemoryMap->Type == EfiConventionalMemory) {\r | |
1446 | for (Type = (EFI_MEMORY_TYPE) 0; Type < EfiMaxMemoryType; Type++) {\r | |
1447 | if (mMemoryTypeStatistics[Type].Special &&\r | |
1448 | mMemoryTypeStatistics[Type].NumberOfPages > 0 &&\r | |
1449 | Entry->Start >= mMemoryTypeStatistics[Type].BaseAddress &&\r | |
1450 | Entry->End <= mMemoryTypeStatistics[Type].MaximumAddress ) {\r | |
1451 | MemoryMap->Type = Type;\r | |
1452 | }\r | |
1453 | }\r | |
1454 | }\r | |
1455 | MemoryMap->Attribute = Entry->Attribute;\r | |
1456 | if (mMemoryTypeStatistics[MemoryMap->Type].Runtime) {\r | |
1457 | MemoryMap->Attribute |= EFI_MEMORY_RUNTIME;\r | |
1458 | }\r | |
1459 | \r | |
1460 | MemoryMap = NextMemoryDescriptor (MemoryMap, Size);\r | |
1461 | }\r | |
1462 | \r | |
1463 | for (Link = mGcdMemorySpaceMap.ForwardLink; Link != &mGcdMemorySpaceMap; Link = Link->ForwardLink) {\r | |
1464 | GcdMapEntry = CR (Link, EFI_GCD_MAP_ENTRY, Link, EFI_GCD_MAP_SIGNATURE);\r | |
1465 | if ((GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) ||\r | |
1466 | (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo)) {\r | |
1467 | if ((GcdMapEntry->Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {\r | |
1468 | \r | |
1469 | MemoryMap->PhysicalStart = GcdMapEntry->BaseAddress;\r | |
1470 | MemoryMap->VirtualStart = 0;\r | |
1471 | MemoryMap->NumberOfPages = RShiftU64 ((GcdMapEntry->EndAddress - GcdMapEntry->BaseAddress + 1), EFI_PAGE_SHIFT);\r | |
1472 | MemoryMap->Attribute = GcdMapEntry->Attributes & ~EFI_MEMORY_PORT_IO;\r | |
1473 | \r | |
1474 | if (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) {\r | |
1475 | MemoryMap->Type = EfiReservedMemoryType;\r | |
1476 | } else if (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {\r | |
1477 | if ((GcdMapEntry->Attributes & EFI_MEMORY_PORT_IO) == EFI_MEMORY_PORT_IO) {\r | |
1478 | MemoryMap->Type = EfiMemoryMappedIOPortSpace;\r | |
1479 | } else {\r | |
1480 | MemoryMap->Type = EfiMemoryMappedIO;\r | |
1481 | }\r | |
1482 | }\r | |
1483 | \r | |
1484 | MemoryMap = NextMemoryDescriptor (MemoryMap, Size);\r | |
1485 | }\r | |
1486 | }\r | |
1487 | }\r | |
1488 | \r | |
1489 | Status = EFI_SUCCESS;\r | |
1490 | \r | |
1491 | Done:\r | |
1492 | \r | |
1493 | CoreReleaseMemoryLock ();\r | |
1494 | \r | |
1495 | CoreReleaseGcdMemoryLock ();\r | |
1496 | \r | |
1497 | // \r | |
1498 | // Update the map key finally \r | |
1499 | // \r | |
1500 | if (MapKey != NULL) {\r | |
1501 | *MapKey = mMemoryMapKey;\r | |
1502 | }\r | |
1503 | \r | |
1504 | *MemoryMapSize = BufferSize;\r | |
1505 | \r | |
1506 | return Status;\r | |
1507 | }\r | |
1508 | \r | |
1509 | VOID *\r | |
1510 | CoreAllocatePoolPages (\r | |
1511 | IN EFI_MEMORY_TYPE PoolType,\r | |
1512 | IN UINTN NumberOfPages,\r | |
1513 | IN UINTN Alignment\r | |
1514 | )\r | |
1515 | /*++\r | |
1516 | \r | |
1517 | Routine Description:\r | |
1518 | \r | |
1519 | Internal function. Used by the pool functions to allocate pages\r | |
1520 | to back pool allocation requests.\r | |
1521 | \r | |
1522 | Arguments:\r | |
1523 | \r | |
1524 | PoolType - The type of memory for the new pool pages\r | |
1525 | \r | |
1526 | NumberOfPages - No of pages to allocate\r | |
1527 | \r | |
1528 | Alignment - Bits to align.\r | |
1529 | \r | |
1530 | Returns:\r | |
1531 | \r | |
1532 | The allocated memory, or NULL\r | |
1533 | \r | |
1534 | --*/\r | |
1535 | {\r | |
1536 | UINT64 Start;\r | |
1537 | \r | |
1538 | //\r | |
1539 | // Find the pages to convert\r | |
1540 | //\r | |
1541 | Start = FindFreePages (EFI_MAX_ADDRESS, NumberOfPages, PoolType, Alignment);\r | |
1542 | \r | |
1543 | //\r | |
1544 | // Convert it to boot services data\r | |
1545 | //\r | |
1546 | if (Start == 0) {\r | |
1547 | DEBUG ((EFI_D_ERROR | EFI_D_PAGE, "AllocatePoolPages: failed to allocate %d pages\n", NumberOfPages));\r | |
1548 | } else {\r | |
1549 | CoreConvertPages (Start, NumberOfPages, PoolType);\r | |
1550 | }\r | |
1551 | \r | |
1552 | return (VOID *)(UINTN)Start;\r | |
1553 | }\r | |
1554 | \r | |
1555 | VOID\r | |
1556 | CoreFreePoolPages (\r | |
1557 | IN EFI_PHYSICAL_ADDRESS Memory,\r | |
1558 | IN UINTN NumberOfPages\r | |
1559 | )\r | |
1560 | /*++\r | |
1561 | \r | |
1562 | Routine Description:\r | |
1563 | \r | |
1564 | Internal function. Frees pool pages allocated via AllocatePoolPages ()\r | |
1565 | \r | |
1566 | Arguments:\r | |
1567 | \r | |
1568 | Memory - The base address to free\r | |
1569 | \r | |
1570 | NumberOfPages - The number of pages to free\r | |
1571 | \r | |
1572 | Returns:\r | |
1573 | \r | |
1574 | None\r | |
1575 | \r | |
1576 | --*/\r | |
1577 | {\r | |
1578 | CoreConvertPages (Memory, NumberOfPages, EfiConventionalMemory);\r | |
1579 | }\r | |
1580 | \r | |
1581 | \r | |
1582 | EFI_STATUS\r | |
1583 | CoreTerminateMemoryMap (\r | |
1584 | IN UINTN MapKey\r | |
1585 | )\r | |
1586 | /*++\r | |
1587 | \r | |
1588 | Routine Description:\r | |
1589 | \r | |
1590 | Make sure the memory map is following all the construction rules, \r | |
1591 | it is the last time to check memory map error before exit boot services.\r | |
1592 | \r | |
1593 | Arguments:\r | |
1594 | \r | |
1595 | MapKey - Memory map key\r | |
1596 | \r | |
1597 | Returns:\r | |
1598 | \r | |
1599 | EFI_INVALID_PARAMETER - Memory map not consistent with construction rules.\r | |
1600 | \r | |
1601 | EFI_SUCCESS - Valid memory map.\r | |
1602 | \r | |
1603 | --*/\r | |
1604 | {\r | |
1605 | EFI_STATUS Status;\r | |
1606 | LIST_ENTRY *Link;\r | |
1607 | MEMORY_MAP *Entry;\r | |
1608 | \r | |
1609 | Status = EFI_SUCCESS;\r | |
1610 | \r | |
1611 | CoreAcquireMemoryLock ();\r | |
1612 | \r | |
1613 | if (MapKey == mMemoryMapKey) {\r | |
1614 | \r | |
1615 | //\r | |
1616 | // Make sure the memory map is following all the construction rules\r | |
1617 | // This is the last chance we will be able to display any messages on\r | |
1618 | // the console devices.\r | |
1619 | //\r | |
1620 | \r | |
1621 | for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {\r | |
1622 | Entry = CR(Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);\r | |
1623 | if (Entry->Attribute & EFI_MEMORY_RUNTIME) { \r | |
1624 | if (Entry->Type == EfiACPIReclaimMemory || Entry->Type == EfiACPIMemoryNVS) {\r | |
1625 | DEBUG((EFI_D_ERROR, "ExitBootServices: ACPI memory entry has RUNTIME attribute set.\n"));\r | |
1626 | CoreReleaseMemoryLock ();\r | |
1627 | return EFI_INVALID_PARAMETER;\r | |
1628 | }\r | |
1629 | if (Entry->Start & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT - 1)) {\r | |
1630 | DEBUG((EFI_D_ERROR, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));\r | |
1631 | CoreReleaseMemoryLock ();\r | |
1632 | return EFI_INVALID_PARAMETER;\r | |
1633 | }\r | |
1634 | if ((Entry->End + 1) & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT - 1)) {\r | |
1635 | DEBUG((EFI_D_ERROR, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));\r | |
1636 | CoreReleaseMemoryLock ();\r | |
1637 | return EFI_INVALID_PARAMETER;\r | |
1638 | }\r | |
1639 | }\r | |
1640 | }\r | |
1641 | \r | |
1642 | //\r | |
1643 | // The map key they gave us matches what we expect. Fall through and\r | |
1644 | // return success. In an ideal world we would clear out all of\r | |
1645 | // EfiBootServicesCode and EfiBootServicesData. However this function\r | |
1646 | // is not the last one called by ExitBootServices(), so we have to\r | |
1647 | // preserve the memory contents.\r | |
1648 | //\r | |
1649 | } else {\r | |
1650 | Status = EFI_INVALID_PARAMETER;\r | |
1651 | }\r | |
1652 | \r | |
1653 | CoreReleaseMemoryLock ();\r | |
1654 | \r | |
1655 | return Status;\r | |
1656 | }\r | |
1657 | \r | |
1658 | \r | |
1659 | \r | |
1660 | \r | |
1661 | \r | |
1662 | \r | |
1663 | \r | |
1664 | \r |