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