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23c98c94 | 1 | /** @file\r |
504214c4 LG |
2 | UEFI Memory pool management functions.\r |
3 | \r | |
6e1e5405 | 4 | Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r |
cd5ebaa0 | 5 | This program and the accompanying materials\r |
23c98c94 | 6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
28a00297 | 12 | \r |
504214c4 | 13 | **/\r |
28a00297 | 14 | \r |
9c4ac31c | 15 | #include "DxeMain.h"\r |
ec90508b | 16 | #include "Imem.h"\r |
28a00297 | 17 | \r |
f3f2e05d | 18 | #define POOL_FREE_SIGNATURE SIGNATURE_32('p','f','r','0')\r |
28a00297 | 19 | typedef struct {\r |
20 | UINT32 Signature;\r | |
21 | UINT32 Index;\r | |
22 | LIST_ENTRY Link;\r | |
23 | } POOL_FREE;\r | |
24 | \r | |
25 | \r | |
f3f2e05d | 26 | #define POOL_HEAD_SIGNATURE SIGNATURE_32('p','h','d','0')\r |
28a00297 | 27 | typedef struct {\r |
28 | UINT32 Signature;\r | |
bb683bf4 | 29 | UINT32 Reserved;\r |
28a00297 | 30 | EFI_MEMORY_TYPE Type;\r |
bb683bf4 | 31 | UINTN Size;\r |
28a00297 | 32 | CHAR8 Data[1];\r |
33 | } POOL_HEAD;\r | |
34 | \r | |
f3f2e05d | 35 | #define SIZE_OF_POOL_HEAD OFFSET_OF(POOL_HEAD,Data)\r |
28a00297 | 36 | \r |
f3f2e05d | 37 | #define POOL_TAIL_SIGNATURE SIGNATURE_32('p','t','a','l')\r |
28a00297 | 38 | typedef struct {\r |
39 | UINT32 Signature;\r | |
bb683bf4 SZ |
40 | UINT32 Reserved;\r |
41 | UINTN Size;\r | |
28a00297 | 42 | } POOL_TAIL;\r |
43 | \r | |
44 | \r | |
45 | #define POOL_SHIFT 7\r | |
46 | \r | |
47 | #define POOL_OVERHEAD (SIZE_OF_POOL_HEAD + sizeof(POOL_TAIL))\r | |
48 | \r | |
49 | #define HEAD_TO_TAIL(a) \\r | |
50 | ((POOL_TAIL *) (((CHAR8 *) (a)) + (a)->Size - sizeof(POOL_TAIL)));\r | |
51 | \r | |
52 | \r | |
53 | #define SIZE_TO_LIST(a) ((a) >> POOL_SHIFT)\r | |
54 | #define LIST_TO_SIZE(a) ((a+1) << POOL_SHIFT)\r | |
55 | \r | |
56 | #define MAX_POOL_LIST SIZE_TO_LIST(DEFAULT_PAGE_ALLOCATION)\r | |
57 | \r | |
58 | #define MAX_POOL_SIZE (MAX_ADDRESS - POOL_OVERHEAD)\r | |
59 | \r | |
60 | //\r | |
61 | // Globals\r | |
62 | //\r | |
63 | \r | |
f3f2e05d | 64 | #define POOL_SIGNATURE SIGNATURE_32('p','l','s','t')\r |
28a00297 | 65 | typedef struct {\r |
66 | INTN Signature;\r | |
67 | UINTN Used;\r | |
68 | EFI_MEMORY_TYPE MemoryType;\r | |
69 | LIST_ENTRY FreeList[MAX_POOL_LIST];\r | |
70 | LIST_ENTRY Link;\r | |
022c6d45 | 71 | } POOL;\r |
28a00297 | 72 | \r |
28a00297 | 73 | //\r |
e94a9ff7 | 74 | // Pool header for each memory type.\r |
75 | //\r | |
76 | POOL mPoolHead[EfiMaxMemoryType];\r | |
77 | \r | |
28a00297 | 78 | //\r |
e94a9ff7 | 79 | // List of pool header to search for the appropriate memory type.\r |
28a00297 | 80 | //\r |
57b4ecb9 | 81 | LIST_ENTRY mPoolHeadList = INITIALIZE_LIST_HEAD_VARIABLE (mPoolHeadList);\r |
28a00297 | 82 | \r |
162ed594 | 83 | \r |
84 | /**\r | |
85 | Called to initialize the pool.\r | |
86 | \r | |
87 | **/\r | |
28a00297 | 88 | VOID\r |
89 | CoreInitializePool (\r | |
90 | VOID\r | |
91 | )\r | |
28a00297 | 92 | {\r |
93 | UINTN Type;\r | |
94 | UINTN Index;\r | |
95 | \r | |
96 | for (Type=0; Type < EfiMaxMemoryType; Type++) {\r | |
e94a9ff7 | 97 | mPoolHead[Type].Signature = 0;\r |
98 | mPoolHead[Type].Used = 0;\r | |
99 | mPoolHead[Type].MemoryType = (EFI_MEMORY_TYPE) Type;\r | |
28a00297 | 100 | for (Index=0; Index < MAX_POOL_LIST; Index++) {\r |
bb683bf4 | 101 | InitializeListHead (&mPoolHead[Type].FreeList[Index]);\r |
28a00297 | 102 | }\r |
103 | }\r | |
28a00297 | 104 | }\r |
105 | \r | |
28a00297 | 106 | \r |
162ed594 | 107 | /**\r |
28a00297 | 108 | Look up pool head for specified memory type.\r |
109 | \r | |
022c6d45 | 110 | @param MemoryType Memory type of which pool head is looked for\r |
28a00297 | 111 | \r |
162ed594 | 112 | @return Pointer of Corresponding pool head.\r |
28a00297 | 113 | \r |
162ed594 | 114 | **/\r |
162ed594 | 115 | POOL *\r |
116 | LookupPoolHead (\r | |
117 | IN EFI_MEMORY_TYPE MemoryType\r | |
118 | )\r | |
28a00297 | 119 | {\r |
120 | LIST_ENTRY *Link;\r | |
121 | POOL *Pool;\r | |
122 | UINTN Index;\r | |
123 | \r | |
3d78c020 | 124 | if ((UINT32)MemoryType < EfiMaxMemoryType) {\r |
e94a9ff7 | 125 | return &mPoolHead[MemoryType];\r |
28a00297 | 126 | }\r |
127 | \r | |
dc8d93ca | 128 | //\r |
129 | // MemoryType values in the range 0x80000000..0xFFFFFFFF are reserved for use by UEFI \r | |
130 | // OS loaders that are provided by operating system vendors\r | |
131 | //\r | |
68db1228 | 132 | if ((INT32)MemoryType < 0) {\r |
28a00297 | 133 | \r |
e94a9ff7 | 134 | for (Link = mPoolHeadList.ForwardLink; Link != &mPoolHeadList; Link = Link->ForwardLink) {\r |
28a00297 | 135 | Pool = CR(Link, POOL, Link, POOL_SIGNATURE);\r |
136 | if (Pool->MemoryType == MemoryType) {\r | |
137 | return Pool;\r | |
138 | }\r | |
139 | }\r | |
140 | \r | |
141 | Pool = CoreAllocatePoolI (EfiBootServicesData, sizeof (POOL));\r | |
142 | if (Pool == NULL) {\r | |
143 | return NULL;\r | |
144 | }\r | |
145 | \r | |
146 | Pool->Signature = POOL_SIGNATURE;\r | |
147 | Pool->Used = 0;\r | |
148 | Pool->MemoryType = MemoryType;\r | |
149 | for (Index=0; Index < MAX_POOL_LIST; Index++) {\r | |
150 | InitializeListHead (&Pool->FreeList[Index]);\r | |
151 | }\r | |
152 | \r | |
e94a9ff7 | 153 | InsertHeadList (&mPoolHeadList, &Pool->Link);\r |
28a00297 | 154 | \r |
155 | return Pool;\r | |
156 | }\r | |
157 | \r | |
158 | return NULL;\r | |
159 | }\r | |
160 | \r | |
022c6d45 | 161 | \r |
28a00297 | 162 | \r |
162ed594 | 163 | /**\r |
164 | Allocate pool of a particular type.\r | |
165 | \r | |
022c6d45 | 166 | @param PoolType Type of pool to allocate\r |
167 | @param Size The amount of pool to allocate\r | |
168 | @param Buffer The address to return a pointer to the allocated\r | |
169 | pool\r | |
162ed594 | 170 | \r |
3e058701 | 171 | @retval EFI_INVALID_PARAMETER PoolType not valid or Buffer is NULL. \r |
022c6d45 | 172 | @retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.\r |
162ed594 | 173 | @retval EFI_SUCCESS Pool successfully allocated.\r |
174 | \r | |
175 | **/\r | |
28a00297 | 176 | EFI_STATUS\r |
177 | EFIAPI\r | |
178 | CoreAllocatePool (\r | |
179 | IN EFI_MEMORY_TYPE PoolType,\r | |
180 | IN UINTN Size,\r | |
181 | OUT VOID **Buffer\r | |
182 | )\r | |
28a00297 | 183 | {\r |
184 | EFI_STATUS Status;\r | |
185 | \r | |
186 | //\r | |
187 | // If it's not a valid type, fail it\r | |
188 | //\r | |
189 | if ((PoolType >= EfiMaxMemoryType && PoolType <= 0x7fffffff) ||\r | |
190 | PoolType == EfiConventionalMemory) {\r | |
191 | return EFI_INVALID_PARAMETER;\r | |
192 | }\r | |
022c6d45 | 193 | \r |
3e058701 ED |
194 | if (Buffer == NULL) {\r |
195 | return EFI_INVALID_PARAMETER;\r | |
196 | }\r | |
197 | \r | |
28a00297 | 198 | *Buffer = NULL;\r |
022c6d45 | 199 | \r |
28a00297 | 200 | //\r |
201 | // If size is too large, fail it\r | |
202 | // Base on the EFI spec, return status of EFI_OUT_OF_RESOURCES\r | |
203 | //\r | |
204 | if (Size > MAX_POOL_SIZE) {\r | |
205 | return EFI_OUT_OF_RESOURCES;\r | |
206 | }\r | |
207 | \r | |
208 | //\r | |
209 | // Acquire the memory lock and make the allocation\r | |
210 | //\r | |
211 | Status = CoreAcquireLockOrFail (&gMemoryLock);\r | |
212 | if (EFI_ERROR (Status)) {\r | |
213 | return EFI_OUT_OF_RESOURCES;\r | |
214 | }\r | |
215 | \r | |
216 | *Buffer = CoreAllocatePoolI (PoolType, Size);\r | |
217 | CoreReleaseMemoryLock ();\r | |
218 | return (*Buffer != NULL) ? EFI_SUCCESS : EFI_OUT_OF_RESOURCES;\r | |
219 | }\r | |
220 | \r | |
221 | \r | |
28a00297 | 222 | \r |
162ed594 | 223 | /**\r |
28a00297 | 224 | Internal function to allocate pool of a particular type.\r |
28a00297 | 225 | Caller must have the memory lock held\r |
226 | \r | |
022c6d45 | 227 | @param PoolType Type of pool to allocate\r |
228 | @param Size The amount of pool to allocate\r | |
28a00297 | 229 | \r |
162ed594 | 230 | @return The allocate pool, or NULL\r |
28a00297 | 231 | \r |
162ed594 | 232 | **/\r |
233 | VOID *\r | |
234 | CoreAllocatePoolI (\r | |
235 | IN EFI_MEMORY_TYPE PoolType,\r | |
236 | IN UINTN Size\r | |
237 | )\r | |
28a00297 | 238 | {\r |
239 | POOL *Pool;\r | |
240 | POOL_FREE *Free;\r | |
241 | POOL_HEAD *Head;\r | |
242 | POOL_TAIL *Tail;\r | |
243 | CHAR8 *NewPage;\r | |
244 | VOID *Buffer;\r | |
245 | UINTN Index;\r | |
246 | UINTN FSize;\r | |
162ed594 | 247 | UINTN Offset;\r |
28a00297 | 248 | UINTN NoPages;\r |
249 | \r | |
250 | ASSERT_LOCKED (&gMemoryLock);\r | |
251 | \r | |
252 | //\r | |
253 | // Adjust the size by the pool header & tail overhead\r | |
254 | //\r | |
022c6d45 | 255 | \r |
28a00297 | 256 | //\r |
257 | // Adjusting the Size to be of proper alignment so that\r | |
258 | // we don't get an unaligned access fault later when\r | |
259 | // pool_Tail is being initialized\r | |
260 | //\r | |
f0d5cbb6 | 261 | Size = ALIGN_VARIABLE (Size);\r |
28a00297 | 262 | \r |
263 | Size += POOL_OVERHEAD;\r | |
264 | Index = SIZE_TO_LIST(Size);\r | |
265 | Pool = LookupPoolHead (PoolType);\r | |
266 | if (Pool== NULL) {\r | |
267 | return NULL;\r | |
268 | }\r | |
269 | Head = NULL;\r | |
270 | \r | |
271 | //\r | |
272 | // If allocation is over max size, just allocate pages for the request\r | |
273 | // (slow)\r | |
274 | //\r | |
275 | if (Index >= MAX_POOL_LIST) {\r | |
276 | NoPages = EFI_SIZE_TO_PAGES(Size) + EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION) - 1;\r | |
6e1e5405 | 277 | NoPages &= ~(UINTN)(EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION) - 1);\r |
28a00297 | 278 | Head = CoreAllocatePoolPages (PoolType, NoPages, DEFAULT_PAGE_ALLOCATION);\r |
279 | goto Done;\r | |
280 | }\r | |
281 | \r | |
282 | //\r | |
283 | // If there's no free pool in the proper list size, go get some more pages\r | |
284 | //\r | |
285 | if (IsListEmpty (&Pool->FreeList[Index])) {\r | |
286 | \r | |
287 | //\r | |
288 | // Get another page\r | |
289 | //\r | |
290 | NewPage = CoreAllocatePoolPages(PoolType, EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION), DEFAULT_PAGE_ALLOCATION);\r | |
291 | if (NewPage == NULL) {\r | |
292 | goto Done;\r | |
293 | }\r | |
294 | \r | |
295 | //\r | |
296 | // Carve up new page into free pool blocks\r | |
297 | //\r | |
162ed594 | 298 | Offset = 0;\r |
299 | while (Offset < DEFAULT_PAGE_ALLOCATION) {\r | |
28a00297 | 300 | ASSERT (Index < MAX_POOL_LIST);\r |
301 | FSize = LIST_TO_SIZE(Index);\r | |
302 | \r | |
162ed594 | 303 | while (Offset + FSize <= DEFAULT_PAGE_ALLOCATION) {\r |
022c6d45 | 304 | Free = (POOL_FREE *) &NewPage[Offset];\r |
28a00297 | 305 | Free->Signature = POOL_FREE_SIGNATURE;\r |
306 | Free->Index = (UINT32)Index;\r | |
307 | InsertHeadList (&Pool->FreeList[Index], &Free->Link);\r | |
162ed594 | 308 | Offset += FSize;\r |
28a00297 | 309 | }\r |
310 | \r | |
311 | Index -= 1;\r | |
312 | }\r | |
313 | \r | |
162ed594 | 314 | ASSERT (Offset == DEFAULT_PAGE_ALLOCATION);\r |
28a00297 | 315 | Index = SIZE_TO_LIST(Size);\r |
316 | }\r | |
317 | \r | |
318 | //\r | |
319 | // Remove entry from free pool list\r | |
320 | //\r | |
321 | Free = CR (Pool->FreeList[Index].ForwardLink, POOL_FREE, Link, POOL_FREE_SIGNATURE);\r | |
322 | RemoveEntryList (&Free->Link);\r | |
323 | \r | |
324 | Head = (POOL_HEAD *) Free;\r | |
325 | \r | |
326 | Done:\r | |
327 | Buffer = NULL;\r | |
328 | \r | |
329 | if (Head != NULL) {\r | |
022c6d45 | 330 | \r |
28a00297 | 331 | //\r |
332 | // If we have a pool buffer, fill in the header & tail info\r | |
333 | //\r | |
334 | Head->Signature = POOL_HEAD_SIGNATURE;\r | |
bb683bf4 | 335 | Head->Size = Size;\r |
28a00297 | 336 | Head->Type = (EFI_MEMORY_TYPE) PoolType;\r |
337 | Tail = HEAD_TO_TAIL (Head);\r | |
338 | Tail->Signature = POOL_TAIL_SIGNATURE;\r | |
bb683bf4 | 339 | Tail->Size = Size;\r |
28a00297 | 340 | Buffer = Head->Data;\r |
341 | DEBUG_CLEAR_MEMORY (Buffer, Size - POOL_OVERHEAD);\r | |
342 | \r | |
e94a9ff7 | 343 | DEBUG ((\r |
344 | DEBUG_POOL,\r | |
57b4ecb9 | 345 | "AllocatePoolI: Type %x, Addr %p (len %lx) %,ld\n", PoolType,\r |
022c6d45 | 346 | Buffer,\r |
57b4ecb9 | 347 | (UINT64)(Size - POOL_OVERHEAD),\r |
348 | (UINT64) Pool->Used\r | |
e94a9ff7 | 349 | ));\r |
28a00297 | 350 | \r |
351 | //\r | |
352 | // Account the allocation\r | |
353 | //\r | |
354 | Pool->Used += Size;\r | |
355 | \r | |
356 | } else {\r | |
57b4ecb9 | 357 | DEBUG ((DEBUG_ERROR | DEBUG_POOL, "AllocatePool: failed to allocate %ld bytes\n", (UINT64) Size));\r |
28a00297 | 358 | }\r |
359 | \r | |
360 | return Buffer;\r | |
361 | }\r | |
022c6d45 | 362 | \r |
28a00297 | 363 | \r |
364 | \r | |
162ed594 | 365 | /**\r |
28a00297 | 366 | Frees pool.\r |
367 | \r | |
022c6d45 | 368 | @param Buffer The allocated pool entry to free\r |
28a00297 | 369 | \r |
022c6d45 | 370 | @retval EFI_INVALID_PARAMETER Buffer is not a valid value.\r |
162ed594 | 371 | @retval EFI_SUCCESS Pool successfully freed.\r |
28a00297 | 372 | \r |
162ed594 | 373 | **/\r |
374 | EFI_STATUS\r | |
375 | EFIAPI\r | |
376 | CoreFreePool (\r | |
377 | IN VOID *Buffer\r | |
378 | )\r | |
28a00297 | 379 | {\r |
380 | EFI_STATUS Status;\r | |
381 | \r | |
e94a9ff7 | 382 | if (Buffer == NULL) {\r |
28a00297 | 383 | return EFI_INVALID_PARAMETER;\r |
384 | }\r | |
385 | \r | |
386 | CoreAcquireMemoryLock ();\r | |
387 | Status = CoreFreePoolI (Buffer);\r | |
388 | CoreReleaseMemoryLock ();\r | |
389 | return Status;\r | |
390 | }\r | |
391 | \r | |
392 | \r | |
28a00297 | 393 | \r |
162ed594 | 394 | /**\r |
28a00297 | 395 | Internal function to free a pool entry.\r |
28a00297 | 396 | Caller must have the memory lock held\r |
397 | \r | |
022c6d45 | 398 | @param Buffer The allocated pool entry to free\r |
28a00297 | 399 | \r |
022c6d45 | 400 | @retval EFI_INVALID_PARAMETER Buffer not valid\r |
162ed594 | 401 | @retval EFI_SUCCESS Buffer successfully freed.\r |
28a00297 | 402 | \r |
162ed594 | 403 | **/\r |
404 | EFI_STATUS\r | |
405 | CoreFreePoolI (\r | |
406 | IN VOID *Buffer\r | |
407 | )\r | |
28a00297 | 408 | {\r |
409 | POOL *Pool;\r | |
410 | POOL_HEAD *Head;\r | |
411 | POOL_TAIL *Tail;\r | |
412 | POOL_FREE *Free;\r | |
413 | UINTN Index;\r | |
414 | UINTN NoPages;\r | |
415 | UINTN Size;\r | |
416 | CHAR8 *NewPage;\r | |
417 | UINTN FSize;\r | |
162ed594 | 418 | UINTN Offset;\r |
28a00297 | 419 | BOOLEAN AllFree;\r |
420 | \r | |
57b4ecb9 | 421 | ASSERT(Buffer != NULL);\r |
28a00297 | 422 | //\r |
423 | // Get the head & tail of the pool entry\r | |
424 | //\r | |
425 | Head = CR (Buffer, POOL_HEAD, Data, POOL_HEAD_SIGNATURE);\r | |
57b4ecb9 | 426 | ASSERT(Head != NULL);\r |
28a00297 | 427 | \r |
428 | if (Head->Signature != POOL_HEAD_SIGNATURE) {\r | |
429 | return EFI_INVALID_PARAMETER;\r | |
430 | }\r | |
431 | \r | |
432 | Tail = HEAD_TO_TAIL (Head);\r | |
57b4ecb9 | 433 | ASSERT(Tail != NULL);\r |
28a00297 | 434 | \r |
435 | //\r | |
436 | // Debug\r | |
437 | //\r | |
438 | ASSERT (Tail->Signature == POOL_TAIL_SIGNATURE);\r | |
439 | ASSERT (Head->Size == Tail->Size);\r | |
440 | ASSERT_LOCKED (&gMemoryLock);\r | |
441 | \r | |
442 | if (Tail->Signature != POOL_TAIL_SIGNATURE) {\r | |
443 | return EFI_INVALID_PARAMETER;\r | |
444 | }\r | |
445 | \r | |
446 | if (Head->Size != Tail->Size) {\r | |
447 | return EFI_INVALID_PARAMETER;\r | |
448 | }\r | |
449 | \r | |
450 | //\r | |
451 | // Determine the pool type and account for it\r | |
452 | //\r | |
453 | Size = Head->Size;\r | |
454 | Pool = LookupPoolHead (Head->Type);\r | |
455 | if (Pool == NULL) {\r | |
456 | return EFI_INVALID_PARAMETER;\r | |
457 | }\r | |
458 | Pool->Used -= Size;\r | |
57b4ecb9 | 459 | DEBUG ((DEBUG_POOL, "FreePool: %p (len %lx) %,ld\n", Head->Data, (UINT64)(Head->Size - POOL_OVERHEAD), (UINT64) Pool->Used));\r |
28a00297 | 460 | \r |
461 | //\r | |
022c6d45 | 462 | // Determine the pool list\r |
28a00297 | 463 | //\r |
464 | Index = SIZE_TO_LIST(Size);\r | |
465 | DEBUG_CLEAR_MEMORY (Head, Size);\r | |
466 | \r | |
467 | //\r | |
468 | // If it's not on the list, it must be pool pages\r | |
469 | //\r | |
470 | if (Index >= MAX_POOL_LIST) {\r | |
471 | \r | |
472 | //\r | |
473 | // Return the memory pages back to free memory\r | |
474 | //\r | |
475 | NoPages = EFI_SIZE_TO_PAGES(Size) + EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION) - 1;\r | |
6e1e5405 | 476 | NoPages &= ~(UINTN)(EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION) - 1);\r |
28a00297 | 477 | CoreFreePoolPages ((EFI_PHYSICAL_ADDRESS) (UINTN) Head, NoPages);\r |
478 | \r | |
479 | } else {\r | |
480 | \r | |
481 | //\r | |
482 | // Put the pool entry onto the free pool list\r | |
483 | //\r | |
484 | Free = (POOL_FREE *) Head;\r | |
57b4ecb9 | 485 | ASSERT(Free != NULL);\r |
28a00297 | 486 | Free->Signature = POOL_FREE_SIGNATURE;\r |
487 | Free->Index = (UINT32)Index;\r | |
488 | InsertHeadList (&Pool->FreeList[Index], &Free->Link);\r | |
489 | \r | |
490 | //\r | |
022c6d45 | 491 | // See if all the pool entries in the same page as Free are freed pool\r |
28a00297 | 492 | // entries\r |
493 | //\r | |
494 | NewPage = (CHAR8 *)((UINTN)Free & ~((DEFAULT_PAGE_ALLOCATION) -1));\r | |
495 | Free = (POOL_FREE *) &NewPage[0];\r | |
e94a9ff7 | 496 | ASSERT(Free != NULL);\r |
28a00297 | 497 | \r |
498 | if (Free->Signature == POOL_FREE_SIGNATURE) {\r | |
499 | \r | |
500 | Index = Free->Index;\r | |
501 | \r | |
502 | AllFree = TRUE;\r | |
162ed594 | 503 | Offset = 0;\r |
022c6d45 | 504 | \r |
162ed594 | 505 | while ((Offset < DEFAULT_PAGE_ALLOCATION) && (AllFree)) {\r |
28a00297 | 506 | FSize = LIST_TO_SIZE(Index);\r |
162ed594 | 507 | while (Offset + FSize <= DEFAULT_PAGE_ALLOCATION) {\r |
508 | Free = (POOL_FREE *) &NewPage[Offset];\r | |
57b4ecb9 | 509 | ASSERT(Free != NULL);\r |
28a00297 | 510 | if (Free->Signature != POOL_FREE_SIGNATURE) {\r |
511 | AllFree = FALSE;\r | |
512 | }\r | |
162ed594 | 513 | Offset += FSize;\r |
28a00297 | 514 | }\r |
515 | Index -= 1;\r | |
516 | }\r | |
517 | \r | |
518 | if (AllFree) {\r | |
519 | \r | |
520 | //\r | |
022c6d45 | 521 | // All of the pool entries in the same page as Free are free pool\r |
28a00297 | 522 | // entries\r |
523 | // Remove all of these pool entries from the free loop lists.\r | |
524 | //\r | |
525 | Free = (POOL_FREE *) &NewPage[0];\r | |
57b4ecb9 | 526 | ASSERT(Free != NULL);\r |
28a00297 | 527 | Index = Free->Index;\r |
162ed594 | 528 | Offset = 0;\r |
022c6d45 | 529 | \r |
162ed594 | 530 | while (Offset < DEFAULT_PAGE_ALLOCATION) {\r |
28a00297 | 531 | FSize = LIST_TO_SIZE(Index);\r |
162ed594 | 532 | while (Offset + FSize <= DEFAULT_PAGE_ALLOCATION) {\r |
533 | Free = (POOL_FREE *) &NewPage[Offset];\r | |
57b4ecb9 | 534 | ASSERT(Free != NULL);\r |
28a00297 | 535 | RemoveEntryList (&Free->Link);\r |
162ed594 | 536 | Offset += FSize;\r |
28a00297 | 537 | }\r |
538 | Index -= 1;\r | |
539 | }\r | |
540 | \r | |
541 | //\r | |
542 | // Free the page\r | |
543 | //\r | |
544 | CoreFreePoolPages ((EFI_PHYSICAL_ADDRESS) (UINTN)NewPage, EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION));\r | |
545 | }\r | |
546 | }\r | |
547 | }\r | |
548 | \r | |
549 | //\r | |
022c6d45 | 550 | // If this is an OS specific memory type, then check to see if the last\r |
28a00297 | 551 | // portion of that memory type has been freed. If it has, then free the\r |
552 | // list entry for that memory type\r | |
553 | //\r | |
3d78c020 | 554 | if ((INT32)Pool->MemoryType < 0 && Pool->Used == 0) {\r |
28a00297 | 555 | RemoveEntryList (&Pool->Link);\r |
556 | CoreFreePoolI (Pool);\r | |
557 | }\r | |
558 | \r | |
559 | return EFI_SUCCESS;\r | |
560 | }\r |