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23c98c94 | 1 | /** @file\r |
504214c4 LG |
2 | UEFI Memory pool management functions.\r |
3 | \r | |
23c98c94 | 4 | Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r |
5 | All rights reserved. This program and the accompanying materials\r | |
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 |
28a00297 | 16 | \r |
17 | #define POOL_FREE_SIGNATURE EFI_SIGNATURE_32('p','f','r','0')\r | |
18 | typedef struct {\r | |
19 | UINT32 Signature;\r | |
20 | UINT32 Index;\r | |
21 | LIST_ENTRY Link;\r | |
22 | } POOL_FREE;\r | |
23 | \r | |
24 | \r | |
25 | #define POOL_HEAD_SIGNATURE EFI_SIGNATURE_32('p','h','d','0')\r | |
26 | typedef struct {\r | |
27 | UINT32 Signature;\r | |
28 | UINT32 Size;\r | |
29 | EFI_MEMORY_TYPE Type;\r | |
30 | UINTN Reserved;\r | |
31 | CHAR8 Data[1];\r | |
32 | } POOL_HEAD;\r | |
33 | \r | |
34 | #define SIZE_OF_POOL_HEAD EFI_FIELD_OFFSET(POOL_HEAD,Data)\r | |
35 | \r | |
36 | #define POOL_TAIL_SIGNATURE EFI_SIGNATURE_32('p','t','a','l')\r | |
37 | typedef struct {\r | |
38 | UINT32 Signature;\r | |
39 | UINT32 Size;\r | |
40 | } POOL_TAIL;\r | |
41 | \r | |
42 | \r | |
43 | #define POOL_SHIFT 7\r | |
44 | \r | |
45 | #define POOL_OVERHEAD (SIZE_OF_POOL_HEAD + sizeof(POOL_TAIL))\r | |
46 | \r | |
47 | #define HEAD_TO_TAIL(a) \\r | |
48 | ((POOL_TAIL *) (((CHAR8 *) (a)) + (a)->Size - sizeof(POOL_TAIL)));\r | |
49 | \r | |
50 | \r | |
51 | #define SIZE_TO_LIST(a) ((a) >> POOL_SHIFT)\r | |
52 | #define LIST_TO_SIZE(a) ((a+1) << POOL_SHIFT)\r | |
53 | \r | |
54 | #define MAX_POOL_LIST SIZE_TO_LIST(DEFAULT_PAGE_ALLOCATION)\r | |
55 | \r | |
56 | #define MAX_POOL_SIZE (MAX_ADDRESS - POOL_OVERHEAD)\r | |
57 | \r | |
58 | //\r | |
59 | // Globals\r | |
60 | //\r | |
61 | \r | |
62 | #define POOL_SIGNATURE EFI_SIGNATURE_32('p','l','s','t')\r | |
63 | typedef struct {\r | |
64 | INTN Signature;\r | |
65 | UINTN Used;\r | |
66 | EFI_MEMORY_TYPE MemoryType;\r | |
67 | LIST_ENTRY FreeList[MAX_POOL_LIST];\r | |
68 | LIST_ENTRY Link;\r | |
022c6d45 | 69 | } POOL;\r |
28a00297 | 70 | \r |
28a00297 | 71 | //\r |
e94a9ff7 | 72 | // Pool header for each memory type.\r |
73 | //\r | |
74 | POOL mPoolHead[EfiMaxMemoryType];\r | |
75 | \r | |
28a00297 | 76 | //\r |
e94a9ff7 | 77 | // List of pool header to search for the appropriate memory type.\r |
28a00297 | 78 | //\r |
57b4ecb9 | 79 | LIST_ENTRY mPoolHeadList = INITIALIZE_LIST_HEAD_VARIABLE (mPoolHeadList);\r |
28a00297 | 80 | \r |
162ed594 | 81 | \r |
82 | /**\r | |
83 | Called to initialize the pool.\r | |
84 | \r | |
85 | **/\r | |
28a00297 | 86 | VOID\r |
87 | CoreInitializePool (\r | |
88 | VOID\r | |
89 | )\r | |
28a00297 | 90 | {\r |
91 | UINTN Type;\r | |
92 | UINTN Index;\r | |
93 | \r | |
94 | for (Type=0; Type < EfiMaxMemoryType; Type++) {\r | |
e94a9ff7 | 95 | mPoolHead[Type].Signature = 0;\r |
96 | mPoolHead[Type].Used = 0;\r | |
97 | mPoolHead[Type].MemoryType = (EFI_MEMORY_TYPE) Type;\r | |
28a00297 | 98 | for (Index=0; Index < MAX_POOL_LIST; Index++) {\r |
e94a9ff7 | 99 | InitializeListHead (&mPoolHead[Type].FreeList[Index]);\r |
28a00297 | 100 | }\r |
101 | }\r | |
28a00297 | 102 | }\r |
103 | \r | |
28a00297 | 104 | \r |
162ed594 | 105 | /**\r |
28a00297 | 106 | Look up pool head for specified memory type.\r |
107 | \r | |
022c6d45 | 108 | @param MemoryType Memory type of which pool head is looked for\r |
28a00297 | 109 | \r |
162ed594 | 110 | @return Pointer of Corresponding pool head.\r |
28a00297 | 111 | \r |
162ed594 | 112 | **/\r |
162ed594 | 113 | POOL *\r |
114 | LookupPoolHead (\r | |
115 | IN EFI_MEMORY_TYPE MemoryType\r | |
116 | )\r | |
28a00297 | 117 | {\r |
118 | LIST_ENTRY *Link;\r | |
119 | POOL *Pool;\r | |
120 | UINTN Index;\r | |
121 | \r | |
122 | if (MemoryType >= 0 && MemoryType < EfiMaxMemoryType) {\r | |
e94a9ff7 | 123 | return &mPoolHead[MemoryType];\r |
28a00297 | 124 | }\r |
125 | \r | |
126 | if (MemoryType < 0) {\r | |
127 | \r | |
e94a9ff7 | 128 | for (Link = mPoolHeadList.ForwardLink; Link != &mPoolHeadList; Link = Link->ForwardLink) {\r |
28a00297 | 129 | Pool = CR(Link, POOL, Link, POOL_SIGNATURE);\r |
130 | if (Pool->MemoryType == MemoryType) {\r | |
131 | return Pool;\r | |
132 | }\r | |
133 | }\r | |
134 | \r | |
135 | Pool = CoreAllocatePoolI (EfiBootServicesData, sizeof (POOL));\r | |
136 | if (Pool == NULL) {\r | |
137 | return NULL;\r | |
138 | }\r | |
139 | \r | |
140 | Pool->Signature = POOL_SIGNATURE;\r | |
141 | Pool->Used = 0;\r | |
142 | Pool->MemoryType = MemoryType;\r | |
143 | for (Index=0; Index < MAX_POOL_LIST; Index++) {\r | |
144 | InitializeListHead (&Pool->FreeList[Index]);\r | |
145 | }\r | |
146 | \r | |
e94a9ff7 | 147 | InsertHeadList (&mPoolHeadList, &Pool->Link);\r |
28a00297 | 148 | \r |
149 | return Pool;\r | |
150 | }\r | |
151 | \r | |
152 | return NULL;\r | |
153 | }\r | |
154 | \r | |
022c6d45 | 155 | \r |
28a00297 | 156 | \r |
162ed594 | 157 | /**\r |
158 | Allocate pool of a particular type.\r | |
159 | \r | |
022c6d45 | 160 | @param PoolType Type of pool to allocate\r |
161 | @param Size The amount of pool to allocate\r | |
162 | @param Buffer The address to return a pointer to the allocated\r | |
163 | pool\r | |
162ed594 | 164 | \r |
022c6d45 | 165 | @retval EFI_INVALID_PARAMETER PoolType not valid\r |
166 | @retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.\r | |
162ed594 | 167 | @retval EFI_SUCCESS Pool successfully allocated.\r |
168 | \r | |
169 | **/\r | |
28a00297 | 170 | EFI_STATUS\r |
171 | EFIAPI\r | |
172 | CoreAllocatePool (\r | |
173 | IN EFI_MEMORY_TYPE PoolType,\r | |
174 | IN UINTN Size,\r | |
175 | OUT VOID **Buffer\r | |
176 | )\r | |
28a00297 | 177 | {\r |
178 | EFI_STATUS Status;\r | |
179 | \r | |
180 | //\r | |
181 | // If it's not a valid type, fail it\r | |
182 | //\r | |
183 | if ((PoolType >= EfiMaxMemoryType && PoolType <= 0x7fffffff) ||\r | |
184 | PoolType == EfiConventionalMemory) {\r | |
185 | return EFI_INVALID_PARAMETER;\r | |
186 | }\r | |
022c6d45 | 187 | \r |
28a00297 | 188 | *Buffer = NULL;\r |
022c6d45 | 189 | \r |
28a00297 | 190 | //\r |
191 | // If size is too large, fail it\r | |
192 | // Base on the EFI spec, return status of EFI_OUT_OF_RESOURCES\r | |
193 | //\r | |
194 | if (Size > MAX_POOL_SIZE) {\r | |
195 | return EFI_OUT_OF_RESOURCES;\r | |
196 | }\r | |
197 | \r | |
198 | //\r | |
199 | // Acquire the memory lock and make the allocation\r | |
200 | //\r | |
201 | Status = CoreAcquireLockOrFail (&gMemoryLock);\r | |
202 | if (EFI_ERROR (Status)) {\r | |
203 | return EFI_OUT_OF_RESOURCES;\r | |
204 | }\r | |
205 | \r | |
206 | *Buffer = CoreAllocatePoolI (PoolType, Size);\r | |
207 | CoreReleaseMemoryLock ();\r | |
208 | return (*Buffer != NULL) ? EFI_SUCCESS : EFI_OUT_OF_RESOURCES;\r | |
209 | }\r | |
210 | \r | |
211 | \r | |
28a00297 | 212 | \r |
162ed594 | 213 | /**\r |
28a00297 | 214 | Internal function to allocate pool of a particular type.\r |
28a00297 | 215 | Caller must have the memory lock held\r |
216 | \r | |
022c6d45 | 217 | @param PoolType Type of pool to allocate\r |
218 | @param Size The amount of pool to allocate\r | |
28a00297 | 219 | \r |
162ed594 | 220 | @return The allocate pool, or NULL\r |
28a00297 | 221 | \r |
162ed594 | 222 | **/\r |
223 | VOID *\r | |
224 | CoreAllocatePoolI (\r | |
225 | IN EFI_MEMORY_TYPE PoolType,\r | |
226 | IN UINTN Size\r | |
227 | )\r | |
28a00297 | 228 | {\r |
229 | POOL *Pool;\r | |
230 | POOL_FREE *Free;\r | |
231 | POOL_HEAD *Head;\r | |
232 | POOL_TAIL *Tail;\r | |
233 | CHAR8 *NewPage;\r | |
234 | VOID *Buffer;\r | |
235 | UINTN Index;\r | |
236 | UINTN FSize;\r | |
162ed594 | 237 | UINTN Offset;\r |
28a00297 | 238 | UINTN NoPages;\r |
239 | \r | |
240 | ASSERT_LOCKED (&gMemoryLock);\r | |
241 | \r | |
242 | //\r | |
243 | // Adjust the size by the pool header & tail overhead\r | |
244 | //\r | |
022c6d45 | 245 | \r |
28a00297 | 246 | //\r |
247 | // Adjusting the Size to be of proper alignment so that\r | |
248 | // we don't get an unaligned access fault later when\r | |
249 | // pool_Tail is being initialized\r | |
250 | //\r | |
f0d5cbb6 | 251 | Size = ALIGN_VARIABLE (Size);\r |
28a00297 | 252 | \r |
253 | Size += POOL_OVERHEAD;\r | |
254 | Index = SIZE_TO_LIST(Size);\r | |
255 | Pool = LookupPoolHead (PoolType);\r | |
256 | if (Pool== NULL) {\r | |
257 | return NULL;\r | |
258 | }\r | |
259 | Head = NULL;\r | |
260 | \r | |
261 | //\r | |
262 | // If allocation is over max size, just allocate pages for the request\r | |
263 | // (slow)\r | |
264 | //\r | |
265 | if (Index >= MAX_POOL_LIST) {\r | |
266 | NoPages = EFI_SIZE_TO_PAGES(Size) + EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION) - 1;\r | |
267 | NoPages &= ~(EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION) - 1);\r | |
268 | Head = CoreAllocatePoolPages (PoolType, NoPages, DEFAULT_PAGE_ALLOCATION);\r | |
269 | goto Done;\r | |
270 | }\r | |
271 | \r | |
272 | //\r | |
273 | // If there's no free pool in the proper list size, go get some more pages\r | |
274 | //\r | |
275 | if (IsListEmpty (&Pool->FreeList[Index])) {\r | |
276 | \r | |
277 | //\r | |
278 | // Get another page\r | |
279 | //\r | |
280 | NewPage = CoreAllocatePoolPages(PoolType, EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION), DEFAULT_PAGE_ALLOCATION);\r | |
281 | if (NewPage == NULL) {\r | |
282 | goto Done;\r | |
283 | }\r | |
284 | \r | |
285 | //\r | |
286 | // Carve up new page into free pool blocks\r | |
287 | //\r | |
162ed594 | 288 | Offset = 0;\r |
289 | while (Offset < DEFAULT_PAGE_ALLOCATION) {\r | |
28a00297 | 290 | ASSERT (Index < MAX_POOL_LIST);\r |
291 | FSize = LIST_TO_SIZE(Index);\r | |
292 | \r | |
162ed594 | 293 | while (Offset + FSize <= DEFAULT_PAGE_ALLOCATION) {\r |
022c6d45 | 294 | Free = (POOL_FREE *) &NewPage[Offset];\r |
28a00297 | 295 | Free->Signature = POOL_FREE_SIGNATURE;\r |
296 | Free->Index = (UINT32)Index;\r | |
297 | InsertHeadList (&Pool->FreeList[Index], &Free->Link);\r | |
162ed594 | 298 | Offset += FSize;\r |
28a00297 | 299 | }\r |
300 | \r | |
301 | Index -= 1;\r | |
302 | }\r | |
303 | \r | |
162ed594 | 304 | ASSERT (Offset == DEFAULT_PAGE_ALLOCATION);\r |
28a00297 | 305 | Index = SIZE_TO_LIST(Size);\r |
306 | }\r | |
307 | \r | |
308 | //\r | |
309 | // Remove entry from free pool list\r | |
310 | //\r | |
311 | Free = CR (Pool->FreeList[Index].ForwardLink, POOL_FREE, Link, POOL_FREE_SIGNATURE);\r | |
312 | RemoveEntryList (&Free->Link);\r | |
313 | \r | |
314 | Head = (POOL_HEAD *) Free;\r | |
315 | \r | |
316 | Done:\r | |
317 | Buffer = NULL;\r | |
318 | \r | |
319 | if (Head != NULL) {\r | |
022c6d45 | 320 | \r |
28a00297 | 321 | //\r |
322 | // If we have a pool buffer, fill in the header & tail info\r | |
323 | //\r | |
324 | Head->Signature = POOL_HEAD_SIGNATURE;\r | |
325 | Head->Size = (UINT32) Size;\r | |
326 | Head->Type = (EFI_MEMORY_TYPE) PoolType;\r | |
327 | Tail = HEAD_TO_TAIL (Head);\r | |
328 | Tail->Signature = POOL_TAIL_SIGNATURE;\r | |
329 | Tail->Size = (UINT32) Size;\r | |
330 | Buffer = Head->Data;\r | |
331 | DEBUG_CLEAR_MEMORY (Buffer, Size - POOL_OVERHEAD);\r | |
332 | \r | |
e94a9ff7 | 333 | DEBUG ((\r |
334 | DEBUG_POOL,\r | |
57b4ecb9 | 335 | "AllocatePoolI: Type %x, Addr %p (len %lx) %,ld\n", PoolType,\r |
022c6d45 | 336 | Buffer,\r |
57b4ecb9 | 337 | (UINT64)(Size - POOL_OVERHEAD),\r |
338 | (UINT64) Pool->Used\r | |
e94a9ff7 | 339 | ));\r |
28a00297 | 340 | \r |
341 | //\r | |
342 | // Account the allocation\r | |
343 | //\r | |
344 | Pool->Used += Size;\r | |
345 | \r | |
346 | } else {\r | |
57b4ecb9 | 347 | DEBUG ((DEBUG_ERROR | DEBUG_POOL, "AllocatePool: failed to allocate %ld bytes\n", (UINT64) Size));\r |
28a00297 | 348 | }\r |
349 | \r | |
350 | return Buffer;\r | |
351 | }\r | |
022c6d45 | 352 | \r |
28a00297 | 353 | \r |
354 | \r | |
162ed594 | 355 | /**\r |
28a00297 | 356 | Frees pool.\r |
357 | \r | |
022c6d45 | 358 | @param Buffer The allocated pool entry to free\r |
28a00297 | 359 | \r |
022c6d45 | 360 | @retval EFI_INVALID_PARAMETER Buffer is not a valid value.\r |
162ed594 | 361 | @retval EFI_SUCCESS Pool successfully freed.\r |
28a00297 | 362 | \r |
162ed594 | 363 | **/\r |
364 | EFI_STATUS\r | |
365 | EFIAPI\r | |
366 | CoreFreePool (\r | |
367 | IN VOID *Buffer\r | |
368 | )\r | |
28a00297 | 369 | {\r |
370 | EFI_STATUS Status;\r | |
371 | \r | |
e94a9ff7 | 372 | if (Buffer == NULL) {\r |
28a00297 | 373 | return EFI_INVALID_PARAMETER;\r |
374 | }\r | |
375 | \r | |
376 | CoreAcquireMemoryLock ();\r | |
377 | Status = CoreFreePoolI (Buffer);\r | |
378 | CoreReleaseMemoryLock ();\r | |
379 | return Status;\r | |
380 | }\r | |
381 | \r | |
382 | \r | |
28a00297 | 383 | \r |
162ed594 | 384 | /**\r |
28a00297 | 385 | Internal function to free a pool entry.\r |
28a00297 | 386 | Caller must have the memory lock held\r |
387 | \r | |
022c6d45 | 388 | @param Buffer The allocated pool entry to free\r |
28a00297 | 389 | \r |
022c6d45 | 390 | @retval EFI_INVALID_PARAMETER Buffer not valid\r |
162ed594 | 391 | @retval EFI_SUCCESS Buffer successfully freed.\r |
28a00297 | 392 | \r |
162ed594 | 393 | **/\r |
394 | EFI_STATUS\r | |
395 | CoreFreePoolI (\r | |
396 | IN VOID *Buffer\r | |
397 | )\r | |
28a00297 | 398 | {\r |
399 | POOL *Pool;\r | |
400 | POOL_HEAD *Head;\r | |
401 | POOL_TAIL *Tail;\r | |
402 | POOL_FREE *Free;\r | |
403 | UINTN Index;\r | |
404 | UINTN NoPages;\r | |
405 | UINTN Size;\r | |
406 | CHAR8 *NewPage;\r | |
407 | UINTN FSize;\r | |
162ed594 | 408 | UINTN Offset;\r |
28a00297 | 409 | BOOLEAN AllFree;\r |
410 | \r | |
57b4ecb9 | 411 | ASSERT(Buffer != NULL);\r |
28a00297 | 412 | //\r |
413 | // Get the head & tail of the pool entry\r | |
414 | //\r | |
415 | Head = CR (Buffer, POOL_HEAD, Data, POOL_HEAD_SIGNATURE);\r | |
57b4ecb9 | 416 | ASSERT(Head != NULL);\r |
28a00297 | 417 | \r |
418 | if (Head->Signature != POOL_HEAD_SIGNATURE) {\r | |
419 | return EFI_INVALID_PARAMETER;\r | |
420 | }\r | |
421 | \r | |
422 | Tail = HEAD_TO_TAIL (Head);\r | |
57b4ecb9 | 423 | ASSERT(Tail != NULL);\r |
28a00297 | 424 | \r |
425 | //\r | |
426 | // Debug\r | |
427 | //\r | |
428 | ASSERT (Tail->Signature == POOL_TAIL_SIGNATURE);\r | |
429 | ASSERT (Head->Size == Tail->Size);\r | |
430 | ASSERT_LOCKED (&gMemoryLock);\r | |
431 | \r | |
432 | if (Tail->Signature != POOL_TAIL_SIGNATURE) {\r | |
433 | return EFI_INVALID_PARAMETER;\r | |
434 | }\r | |
435 | \r | |
436 | if (Head->Size != Tail->Size) {\r | |
437 | return EFI_INVALID_PARAMETER;\r | |
438 | }\r | |
439 | \r | |
440 | //\r | |
441 | // Determine the pool type and account for it\r | |
442 | //\r | |
443 | Size = Head->Size;\r | |
444 | Pool = LookupPoolHead (Head->Type);\r | |
445 | if (Pool == NULL) {\r | |
446 | return EFI_INVALID_PARAMETER;\r | |
447 | }\r | |
448 | Pool->Used -= Size;\r | |
57b4ecb9 | 449 | DEBUG ((DEBUG_POOL, "FreePool: %p (len %lx) %,ld\n", Head->Data, (UINT64)(Head->Size - POOL_OVERHEAD), (UINT64) Pool->Used));\r |
28a00297 | 450 | \r |
451 | //\r | |
022c6d45 | 452 | // Determine the pool list\r |
28a00297 | 453 | //\r |
454 | Index = SIZE_TO_LIST(Size);\r | |
455 | DEBUG_CLEAR_MEMORY (Head, Size);\r | |
456 | \r | |
457 | //\r | |
458 | // If it's not on the list, it must be pool pages\r | |
459 | //\r | |
460 | if (Index >= MAX_POOL_LIST) {\r | |
461 | \r | |
462 | //\r | |
463 | // Return the memory pages back to free memory\r | |
464 | //\r | |
465 | NoPages = EFI_SIZE_TO_PAGES(Size) + EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION) - 1;\r | |
466 | NoPages &= ~(EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION) - 1);\r | |
467 | CoreFreePoolPages ((EFI_PHYSICAL_ADDRESS) (UINTN) Head, NoPages);\r | |
468 | \r | |
469 | } else {\r | |
470 | \r | |
471 | //\r | |
472 | // Put the pool entry onto the free pool list\r | |
473 | //\r | |
474 | Free = (POOL_FREE *) Head;\r | |
57b4ecb9 | 475 | ASSERT(Free != NULL);\r |
28a00297 | 476 | Free->Signature = POOL_FREE_SIGNATURE;\r |
477 | Free->Index = (UINT32)Index;\r | |
478 | InsertHeadList (&Pool->FreeList[Index], &Free->Link);\r | |
479 | \r | |
480 | //\r | |
022c6d45 | 481 | // See if all the pool entries in the same page as Free are freed pool\r |
28a00297 | 482 | // entries\r |
483 | //\r | |
484 | NewPage = (CHAR8 *)((UINTN)Free & ~((DEFAULT_PAGE_ALLOCATION) -1));\r | |
485 | Free = (POOL_FREE *) &NewPage[0];\r | |
e94a9ff7 | 486 | ASSERT(Free != NULL);\r |
28a00297 | 487 | \r |
488 | if (Free->Signature == POOL_FREE_SIGNATURE) {\r | |
489 | \r | |
490 | Index = Free->Index;\r | |
491 | \r | |
492 | AllFree = TRUE;\r | |
162ed594 | 493 | Offset = 0;\r |
022c6d45 | 494 | \r |
162ed594 | 495 | while ((Offset < DEFAULT_PAGE_ALLOCATION) && (AllFree)) {\r |
28a00297 | 496 | FSize = LIST_TO_SIZE(Index);\r |
162ed594 | 497 | while (Offset + FSize <= DEFAULT_PAGE_ALLOCATION) {\r |
498 | Free = (POOL_FREE *) &NewPage[Offset];\r | |
57b4ecb9 | 499 | ASSERT(Free != NULL);\r |
28a00297 | 500 | if (Free->Signature != POOL_FREE_SIGNATURE) {\r |
501 | AllFree = FALSE;\r | |
502 | }\r | |
162ed594 | 503 | Offset += FSize;\r |
28a00297 | 504 | }\r |
505 | Index -= 1;\r | |
506 | }\r | |
507 | \r | |
508 | if (AllFree) {\r | |
509 | \r | |
510 | //\r | |
022c6d45 | 511 | // All of the pool entries in the same page as Free are free pool\r |
28a00297 | 512 | // entries\r |
513 | // Remove all of these pool entries from the free loop lists.\r | |
514 | //\r | |
515 | Free = (POOL_FREE *) &NewPage[0];\r | |
57b4ecb9 | 516 | ASSERT(Free != NULL);\r |
28a00297 | 517 | Index = Free->Index;\r |
162ed594 | 518 | Offset = 0;\r |
022c6d45 | 519 | \r |
162ed594 | 520 | while (Offset < DEFAULT_PAGE_ALLOCATION) {\r |
28a00297 | 521 | FSize = LIST_TO_SIZE(Index);\r |
162ed594 | 522 | while (Offset + FSize <= DEFAULT_PAGE_ALLOCATION) {\r |
523 | Free = (POOL_FREE *) &NewPage[Offset];\r | |
57b4ecb9 | 524 | ASSERT(Free != NULL);\r |
28a00297 | 525 | RemoveEntryList (&Free->Link);\r |
162ed594 | 526 | Offset += FSize;\r |
28a00297 | 527 | }\r |
528 | Index -= 1;\r | |
529 | }\r | |
530 | \r | |
531 | //\r | |
532 | // Free the page\r | |
533 | //\r | |
534 | CoreFreePoolPages ((EFI_PHYSICAL_ADDRESS) (UINTN)NewPage, EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION));\r | |
535 | }\r | |
536 | }\r | |
537 | }\r | |
538 | \r | |
539 | //\r | |
022c6d45 | 540 | // If this is an OS specific memory type, then check to see if the last\r |
28a00297 | 541 | // portion of that memory type has been freed. If it has, then free the\r |
542 | // list entry for that memory type\r | |
543 | //\r | |
544 | if (Pool->MemoryType < 0 && Pool->Used == 0) {\r | |
545 | RemoveEntryList (&Pool->Link);\r | |
546 | CoreFreePoolI (Pool);\r | |
547 | }\r | |
548 | \r | |
549 | return EFI_SUCCESS;\r | |
550 | }\r |