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e386b444 | 1 | /** @file\r |
9e6fa6d2 LG |
2 | Support routines for memory allocation routines \r |
3 | based on PeiService for PEI phase drivers.\r | |
e386b444 | 4 | \r |
2132ef05 | 5 | Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r |
19388d29 | 6 | This program and the accompanying materials \r |
e386b444 | 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 | |
2fc59a00 | 9 | http://opensource.org/licenses/bsd-license.php. \r |
e386b444 | 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 | |
e386b444 | 14 | **/\r |
15 | \r | |
c892d846 | 16 | \r |
c7d265a9 | 17 | #include <PiPei.h>\r |
c892d846 | 18 | \r |
19 | \r | |
c7d265a9 | 20 | #include <Library/MemoryAllocationLib.h>\r |
1c280088 | 21 | #include <Library/PeiServicesLib.h>\r |
c7d265a9 | 22 | #include <Library/BaseMemoryLib.h>\r |
23 | #include <Library/DebugLib.h>\r | |
1dde8b08 | 24 | #include <Library/HobLib.h>\r |
e386b444 | 25 | \r |
e386b444 | 26 | \r |
27 | /**\r | |
28 | Allocates one or more 4KB pages of a certain memory type.\r | |
29 | \r | |
30 | Allocates the number of 4KB pages of a certain memory type and returns a pointer to the allocated\r | |
31 | buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL is returned.\r | |
32 | If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
33 | \r | |
34 | @param MemoryType The type of memory to allocate.\r | |
35 | @param Pages The number of 4 KB pages to allocate.\r | |
36 | \r | |
37 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
38 | \r | |
39 | **/\r | |
40 | VOID *\r | |
41 | InternalAllocatePages (\r | |
42 | IN EFI_MEMORY_TYPE MemoryType, \r | |
43 | IN UINTN Pages\r | |
44 | )\r | |
45 | {\r | |
46 | EFI_STATUS Status;\r | |
47 | EFI_PHYSICAL_ADDRESS Memory; \r | |
e386b444 | 48 | \r |
49 | if (Pages == 0) {\r | |
50 | return NULL;\r | |
51 | }\r | |
52 | \r | |
34363594 | 53 | Status = PeiServicesAllocatePages (MemoryType, Pages, &Memory);\r |
e386b444 | 54 | if (EFI_ERROR (Status)) {\r |
9e6fa6d2 | 55 | return NULL;\r |
e386b444 | 56 | }\r |
1dde8b08 | 57 | \r |
e386b444 | 58 | return (VOID *) (UINTN) Memory;\r |
59 | }\r | |
60 | \r | |
61 | /**\r | |
62 | Allocates one or more 4KB pages of type EfiBootServicesData.\r | |
63 | \r | |
64 | Allocates the number of 4KB pages of type EfiBootServicesData and returns a pointer to the\r | |
65 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
66 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
67 | returned.\r | |
68 | \r | |
69 | @param Pages The number of 4 KB pages to allocate.\r | |
70 | \r | |
71 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
72 | \r | |
73 | **/\r | |
74 | VOID *\r | |
75 | EFIAPI\r | |
76 | AllocatePages (\r | |
77 | IN UINTN Pages\r | |
78 | )\r | |
79 | {\r | |
80 | return InternalAllocatePages (EfiBootServicesData, Pages);\r | |
81 | }\r | |
82 | \r | |
83 | /**\r | |
84 | Allocates one or more 4KB pages of type EfiRuntimeServicesData.\r | |
85 | \r | |
86 | Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the\r | |
87 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
88 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
89 | returned.\r | |
90 | \r | |
91 | @param Pages The number of 4 KB pages to allocate.\r | |
92 | \r | |
93 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
94 | \r | |
95 | **/\r | |
96 | VOID *\r | |
97 | EFIAPI\r | |
98 | AllocateRuntimePages (\r | |
99 | IN UINTN Pages\r | |
100 | )\r | |
101 | {\r | |
102 | return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r | |
103 | }\r | |
104 | \r | |
105 | /**\r | |
106 | Allocates one or more 4KB pages of type EfiReservedMemoryType.\r | |
107 | \r | |
108 | Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a pointer to the\r | |
109 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
110 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
111 | returned.\r | |
112 | \r | |
113 | @param Pages The number of 4 KB pages to allocate.\r | |
114 | \r | |
115 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
116 | \r | |
117 | **/\r | |
118 | VOID *\r | |
119 | EFIAPI\r | |
120 | AllocateReservedPages (\r | |
121 | IN UINTN Pages\r | |
122 | )\r | |
123 | {\r | |
124 | return InternalAllocatePages (EfiReservedMemoryType, Pages);\r | |
125 | }\r | |
126 | \r | |
127 | /**\r | |
128 | Frees one or more 4KB pages that were previously allocated with one of the page allocation\r | |
129 | functions in the Memory Allocation Library.\r | |
130 | \r | |
131 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r | |
132 | must have been allocated on a previous call to the page allocation services of the Memory\r | |
6e10b70a | 133 | Allocation Library. If it is not possible to free allocated pages, then this function will\r |
446b94b0 | 134 | perform no actions.\r |
9638ba6d | 135 | \r |
e386b444 | 136 | If Buffer was not allocated with a page allocation function in the Memory Allocation Library,\r |
137 | then ASSERT().\r | |
138 | If Pages is zero, then ASSERT().\r | |
139 | \r | |
2fc59a00 | 140 | @param Buffer The pointer to the buffer of pages to free.\r |
e386b444 | 141 | @param Pages The number of 4 KB pages to free.\r |
142 | \r | |
143 | **/\r | |
144 | VOID\r | |
145 | EFIAPI\r | |
146 | FreePages (\r | |
147 | IN VOID *Buffer,\r | |
148 | IN UINTN Pages\r | |
149 | )\r | |
150 | {\r | |
2132ef05 SZ |
151 | EFI_STATUS Status;\r |
152 | \r | |
6e10b70a | 153 | ASSERT (Pages != 0);\r |
2132ef05 SZ |
154 | Status = PeiServicesFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r |
155 | ASSERT_EFI_ERROR (Status);\r | |
e386b444 | 156 | }\r |
157 | \r | |
158 | /**\r | |
159 | Allocates one or more 4KB pages of a certain memory type at a specified alignment.\r | |
160 | \r | |
161 | Allocates the number of 4KB pages specified by Pages of a certain memory type with an alignment\r | |
162 | specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is returned.\r | |
163 | If there is not enough memory at the specified alignment remaining to satisfy the request, then\r | |
164 | NULL is returned.\r | |
165 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
1346352d | 166 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
e386b444 | 167 | \r |
168 | @param MemoryType The type of memory to allocate.\r | |
169 | @param Pages The number of 4 KB pages to allocate.\r | |
58380e9c | 170 | @param Alignment The requested alignment of the allocation. \r |
171 | Must be a power of two.\r | |
e386b444 | 172 | If Alignment is zero, then byte alignment is used.\r |
173 | \r | |
174 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
175 | \r | |
176 | **/\r | |
177 | VOID *\r | |
178 | InternalAllocateAlignedPages (\r | |
179 | IN EFI_MEMORY_TYPE MemoryType, \r | |
180 | IN UINTN Pages,\r | |
181 | IN UINTN Alignment\r | |
182 | )\r | |
183 | {\r | |
6809c872 LG |
184 | EFI_PHYSICAL_ADDRESS Memory;\r |
185 | EFI_PHYSICAL_ADDRESS AlignedMemory;\r | |
186 | EFI_PEI_HOB_POINTERS Hob;\r | |
4c103c55 LG |
187 | BOOLEAN SkipBeforeMemHob;\r |
188 | BOOLEAN SkipAfterMemHob;\r | |
6809c872 LG |
189 | EFI_PHYSICAL_ADDRESS HobBaseAddress;\r |
190 | UINT64 HobLength;\r | |
191 | EFI_MEMORY_TYPE HobMemoryType;\r | |
192 | UINTN TotalPages;\r | |
e386b444 | 193 | \r |
194 | //\r | |
195 | // Alignment must be a power of two or zero.\r | |
196 | //\r | |
197 | ASSERT ((Alignment & (Alignment - 1)) == 0);\r | |
198 | \r | |
199 | if (Pages == 0) {\r | |
200 | return NULL;\r | |
201 | }\r | |
202 | //\r | |
203 | // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.\r | |
204 | //\r | |
6809c872 LG |
205 | ASSERT (Pages <= (MAX_ADDRESS - EFI_SIZE_TO_PAGES (Alignment))); \r |
206 | \r | |
e386b444 | 207 | //\r |
208 | // We would rather waste some memory to save PEI code size.\r | |
6809c872 LG |
209 | // meaning in addition to the requested size for the aligned mem,\r |
210 | // we simply reserve an overhead memory equal to Alignmemt(page-aligned), no matter what.\r | |
211 | // The overhead mem size could be reduced later with more involved malloc mechanisms\r | |
212 | // (e.g., somthing that can detect the alignment boundary before allocating memory or \r | |
213 | // can request that memory be allocated at a certain address that is aleady aligned).\r | |
214 | //\r | |
215 | TotalPages = Pages + (Alignment <= EFI_PAGE_SIZE ? 0 : EFI_SIZE_TO_PAGES(Alignment));\r | |
216 | Memory = (EFI_PHYSICAL_ADDRESS) (UINTN) InternalAllocatePages (MemoryType, TotalPages);\r | |
217 | if (Memory == 0) {\r | |
218 | DEBUG((DEBUG_INFO, "Out of memory resource! \n"));\r | |
219 | return NULL;\r | |
220 | }\r | |
221 | DEBUG ((DEBUG_INFO, "Allocated Memory unaligned: Address = 0x%LX, Pages = 0x%X, Type = %d \n", Memory, TotalPages, (UINTN) MemoryType));\r | |
222 | \r | |
223 | //\r | |
224 | // Alignment calculation\r | |
225 | //\r | |
226 | AlignedMemory = Memory;\r | |
227 | if (Alignment > EFI_PAGE_SIZE) {\r | |
228 | AlignedMemory = ALIGN_VALUE (Memory, Alignment);\r | |
229 | }\r | |
230 | DEBUG ((DEBUG_INFO, "After aligning to 0x%X bytes: Address = 0x%LX, Pages = 0x%X \n", Alignment, AlignedMemory, Pages));\r | |
231 | \r | |
232 | //\r | |
233 | // In general three HOBs cover the total allocated space.\r | |
234 | // The aligned portion is covered by the aligned mem HOB and\r | |
235 | // the unaligned(to be freed) portions before and after the aligned portion are covered by newly created HOBs.\r | |
e386b444 | 236 | //\r |
6809c872 LG |
237 | // Before mem HOB covers the region between "Memory" and "AlignedMemory"\r |
238 | // Aligned mem HOB covers the region between "AlignedMemory" and "AlignedMemory + EFI_PAGES_TO_SIZE(Pages)"\r | |
239 | // After mem HOB covers the region between "AlignedMemory + EFI_PAGES_TO_SIZE(Pages)" and "Memory + EFI_PAGES_TO_SIZE(TotalPages)"\r | |
240 | //\r | |
241 | // The before or after mem HOBs need to be skipped under special cases where the aligned portion\r | |
242 | // touches either the top or bottom of the original allocated space.\r | |
243 | //\r | |
4c103c55 LG |
244 | SkipBeforeMemHob = FALSE;\r |
245 | SkipAfterMemHob = FALSE;\r | |
6809c872 LG |
246 | if (Memory == AlignedMemory) {\r |
247 | SkipBeforeMemHob = TRUE;\r | |
248 | }\r | |
249 | if ((Memory + EFI_PAGES_TO_SIZE(TotalPages)) == (AlignedMemory + EFI_PAGES_TO_SIZE(Pages))) {\r | |
250 | //\r | |
251 | // This condition is never met in the current implementation.\r | |
252 | // There is always some after-mem since the overhead mem(used in TotalPages)\r | |
253 | // is no less than Alignment.\r | |
254 | //\r | |
255 | SkipAfterMemHob = TRUE;\r | |
256 | }\r | |
257 | \r | |
258 | // \r | |
259 | // Search for the mem HOB referring to the original(unaligned) allocation \r | |
260 | // and update the size and type if needed.\r | |
261 | //\r | |
262 | Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);\r | |
263 | while (Hob.Raw != NULL) {\r | |
264 | if (Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress == Memory) {\r | |
265 | break;\r | |
266 | }\r | |
267 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
268 | Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, Hob.Raw);\r | |
269 | }\r | |
270 | ASSERT (Hob.Raw != NULL);\r | |
271 | if (SkipBeforeMemHob) {\r | |
272 | //\r | |
273 | // Use this HOB as aligned mem HOB as there is no portion before it.\r | |
274 | //\r | |
275 | HobLength = EFI_PAGES_TO_SIZE(Pages);\r | |
276 | Hob.MemoryAllocation->AllocDescriptor.MemoryLength = HobLength;\r | |
277 | } else {\r | |
278 | //\r | |
279 | // Use this HOB as before mem HOB and create a new HOB for the aligned portion \r | |
280 | //\r | |
281 | HobLength = (AlignedMemory - Memory); \r | |
282 | Hob.MemoryAllocation->AllocDescriptor.MemoryLength = HobLength;\r | |
283 | Hob.MemoryAllocation->AllocDescriptor.MemoryType = EfiConventionalMemory;\r | |
284 | }\r | |
285 | \r | |
286 | HobBaseAddress = Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress;\r | |
287 | HobMemoryType = Hob.MemoryAllocation->AllocDescriptor.MemoryType;\r | |
288 | \r | |
289 | //\r | |
290 | // Build the aligned mem HOB if needed\r | |
291 | //\r | |
292 | if (!SkipBeforeMemHob) {\r | |
293 | DEBUG((DEBUG_INFO, "Updated before-mem HOB with BaseAddress = %LX, Length = %LX, MemoryType = %d \n",\r | |
294 | HobBaseAddress, HobLength, (UINTN) HobMemoryType));\r | |
295 | \r | |
296 | HobBaseAddress = AlignedMemory;\r | |
297 | HobLength = EFI_PAGES_TO_SIZE(Pages);\r | |
298 | HobMemoryType = MemoryType;\r | |
299 | \r | |
300 | BuildMemoryAllocationHob (\r | |
301 | HobBaseAddress,\r | |
302 | HobLength,\r | |
303 | HobMemoryType\r | |
304 | );\r | |
305 | \r | |
306 | DEBUG((DEBUG_INFO, "Created aligned-mem HOB with BaseAddress = %LX, Length = %LX, MemoryType = %d \n",\r | |
307 | HobBaseAddress, HobLength, (UINTN) HobMemoryType));\r | |
e386b444 | 308 | } else {\r |
6809c872 LG |
309 | if (HobBaseAddress != 0) {\r |
310 | DEBUG((DEBUG_INFO, "Updated aligned-mem HOB with BaseAddress = %LX, Length = %LX, MemoryType = %d \n",\r | |
311 | HobBaseAddress, HobLength, (UINTN) HobMemoryType));\r | |
312 | }\r | |
e386b444 | 313 | }\r |
6809c872 LG |
314 | \r |
315 | \r | |
316 | //\r | |
317 | // Build the after mem HOB if needed\r | |
318 | //\r | |
319 | if (!SkipAfterMemHob) {\r | |
320 | HobBaseAddress = AlignedMemory + EFI_PAGES_TO_SIZE(Pages);\r | |
321 | HobLength = (Memory + EFI_PAGES_TO_SIZE(TotalPages)) - (AlignedMemory + EFI_PAGES_TO_SIZE(Pages));\r | |
322 | HobMemoryType = EfiConventionalMemory;\r | |
323 | \r | |
324 | BuildMemoryAllocationHob (\r | |
325 | HobBaseAddress,\r | |
326 | HobLength,\r | |
327 | HobMemoryType\r | |
328 | );\r | |
329 | \r | |
330 | DEBUG((DEBUG_INFO, "Created after-mem HOB with BaseAddress = %LX, Length = %LX, MemoryType = %d \n",\r | |
331 | HobBaseAddress, HobLength, (UINTN) HobMemoryType));\r | |
332 | }\r | |
333 | \r | |
334 | return (VOID *) (UINTN) AlignedMemory;\r | |
e386b444 | 335 | }\r |
336 | \r | |
337 | /**\r | |
338 | Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.\r | |
339 | \r | |
340 | Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an\r | |
341 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
342 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
343 | request, then NULL is returned.\r | |
9638ba6d | 344 | \r |
e386b444 | 345 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
1346352d | 346 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
e386b444 | 347 | \r |
348 | @param Pages The number of 4 KB pages to allocate.\r | |
58380e9c | 349 | @param Alignment The requested alignment of the allocation. \r |
350 | Must be a power of two.\r | |
e386b444 | 351 | If Alignment is zero, then byte alignment is used.\r |
352 | \r | |
353 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
354 | \r | |
355 | **/\r | |
356 | VOID *\r | |
357 | EFIAPI\r | |
358 | AllocateAlignedPages (\r | |
359 | IN UINTN Pages,\r | |
360 | IN UINTN Alignment\r | |
361 | )\r | |
362 | {\r | |
363 | return InternalAllocateAlignedPages (EfiBootServicesData, Pages, Alignment);\r | |
364 | }\r | |
365 | \r | |
366 | /**\r | |
367 | Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.\r | |
368 | \r | |
369 | Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData with an\r | |
370 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
371 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
372 | request, then NULL is returned.\r | |
9638ba6d | 373 | \r |
e386b444 | 374 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
1346352d | 375 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
e386b444 | 376 | \r |
377 | @param Pages The number of 4 KB pages to allocate.\r | |
58380e9c | 378 | @param Alignment The requested alignment of the allocation. \r |
379 | Must be a power of two.\r | |
e386b444 | 380 | If Alignment is zero, then byte alignment is used.\r |
381 | \r | |
382 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
383 | \r | |
384 | **/\r | |
385 | VOID *\r | |
386 | EFIAPI\r | |
387 | AllocateAlignedRuntimePages (\r | |
388 | IN UINTN Pages,\r | |
389 | IN UINTN Alignment\r | |
390 | )\r | |
391 | {\r | |
392 | return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r | |
393 | }\r | |
394 | \r | |
395 | /**\r | |
396 | Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.\r | |
397 | \r | |
398 | Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType with an\r | |
399 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
400 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
401 | request, then NULL is returned.\r | |
9638ba6d | 402 | \r |
e386b444 | 403 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
1346352d | 404 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
e386b444 | 405 | \r |
406 | @param Pages The number of 4 KB pages to allocate.\r | |
58380e9c | 407 | @param Alignment The requested alignment of the allocation. \r |
408 | Must be a power of two.\r | |
e386b444 | 409 | If Alignment is zero, then byte alignment is used.\r |
410 | \r | |
411 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
412 | \r | |
413 | **/\r | |
414 | VOID *\r | |
415 | EFIAPI\r | |
416 | AllocateAlignedReservedPages (\r | |
417 | IN UINTN Pages,\r | |
418 | IN UINTN Alignment\r | |
419 | )\r | |
420 | {\r | |
421 | return InternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment);\r | |
422 | }\r | |
423 | \r | |
424 | /**\r | |
425 | Frees one or more 4KB pages that were previously allocated with one of the aligned page\r | |
426 | allocation functions in the Memory Allocation Library.\r | |
427 | \r | |
428 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r | |
429 | must have been allocated on a previous call to the aligned page allocation services of the Memory\r | |
6e10b70a | 430 | Allocation Library. If it is not possible to free allocated pages, then this function will \r |
446b94b0 | 431 | perform no actions.\r |
9638ba6d | 432 | \r |
e386b444 | 433 | If Buffer was not allocated with an aligned page allocation function in the Memory Allocation\r |
434 | Library, then ASSERT().\r | |
435 | If Pages is zero, then ASSERT().\r | |
436 | \r | |
2fc59a00 | 437 | @param Buffer The pointer to the buffer of pages to free.\r |
e386b444 | 438 | @param Pages The number of 4 KB pages to free.\r |
439 | \r | |
440 | **/\r | |
441 | VOID\r | |
442 | EFIAPI\r | |
443 | FreeAlignedPages (\r | |
444 | IN VOID *Buffer,\r | |
445 | IN UINTN Pages\r | |
446 | )\r | |
447 | {\r | |
2132ef05 SZ |
448 | EFI_STATUS Status;\r |
449 | \r | |
6e10b70a | 450 | ASSERT (Pages != 0);\r |
2132ef05 SZ |
451 | Status = PeiServicesFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r |
452 | ASSERT_EFI_ERROR (Status);\r | |
e386b444 | 453 | }\r |
454 | \r | |
455 | /**\r | |
456 | Allocates a buffer of a certain pool type.\r | |
457 | \r | |
458 | Allocates the number bytes specified by AllocationSize of a certain pool type and returns a\r | |
459 | pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
460 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
461 | \r | |
462 | @param MemoryType The type of memory to allocate.\r | |
463 | @param AllocationSize The number of bytes to allocate.\r | |
464 | \r | |
465 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
466 | \r | |
467 | **/\r | |
468 | VOID *\r | |
469 | InternalAllocatePool (\r | |
470 | IN EFI_MEMORY_TYPE MemoryType, \r | |
471 | IN UINTN AllocationSize\r | |
472 | )\r | |
473 | {\r | |
474 | //\r | |
475 | // If we need lots of small runtime/reserved memory type from PEI in the future, \r | |
476 | // we can consider providing a more complex algorithm that allocates runtime pages and \r | |
477 | // provide pool allocations from those pages. \r | |
478 | //\r | |
479 | return InternalAllocatePages (MemoryType, EFI_SIZE_TO_PAGES (AllocationSize));\r | |
480 | }\r | |
481 | \r | |
482 | /**\r | |
483 | Allocates a buffer of type EfiBootServicesData.\r | |
484 | \r | |
485 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a\r | |
486 | pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
487 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
488 | \r | |
489 | @param AllocationSize The number of bytes to allocate.\r | |
490 | \r | |
491 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
492 | \r | |
493 | **/\r | |
494 | VOID *\r | |
495 | EFIAPI\r | |
496 | AllocatePool (\r | |
497 | IN UINTN AllocationSize\r | |
498 | )\r | |
499 | {\r | |
500 | EFI_STATUS Status;\r | |
e386b444 | 501 | VOID *Buffer;\r |
502 | \r | |
1c280088 | 503 | Status = PeiServicesAllocatePool (AllocationSize, &Buffer);\r |
e386b444 | 504 | if (EFI_ERROR (Status)) {\r |
505 | Buffer = NULL;\r | |
506 | }\r | |
507 | return Buffer;\r | |
508 | }\r | |
509 | \r | |
510 | /**\r | |
511 | Allocates a buffer of type EfiRuntimeServicesData.\r | |
512 | \r | |
513 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData and returns\r | |
514 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
515 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
516 | \r | |
517 | @param AllocationSize The number of bytes to allocate.\r | |
518 | \r | |
519 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
520 | \r | |
521 | **/\r | |
522 | VOID *\r | |
523 | EFIAPI\r | |
524 | AllocateRuntimePool (\r | |
525 | IN UINTN AllocationSize\r | |
526 | )\r | |
527 | {\r | |
528 | return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r | |
529 | }\r | |
530 | \r | |
531 | /**\r | |
8789c5e0 | 532 | Allocates a buffer of type EfiReservedMemoryType.\r |
e386b444 | 533 | \r |
8789c5e0 | 534 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType and returns\r |
e386b444 | 535 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r |
536 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
537 | \r | |
538 | @param AllocationSize The number of bytes to allocate.\r | |
539 | \r | |
540 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
541 | \r | |
542 | **/\r | |
543 | VOID *\r | |
544 | EFIAPI\r | |
545 | AllocateReservedPool (\r | |
546 | IN UINTN AllocationSize\r | |
547 | )\r | |
548 | {\r | |
549 | return InternalAllocatePool (EfiReservedMemoryType, AllocationSize);\r | |
550 | }\r | |
551 | \r | |
552 | /**\r | |
446b94b0 | 553 | Allocates and zeros a buffer of a certain pool type.\r |
e386b444 | 554 | \r |
446b94b0 | 555 | Allocates the number bytes specified by AllocationSize of a certain pool type, clears the buffer\r |
e386b444 | 556 | with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a valid\r |
557 | buffer of 0 size is returned. If there is not enough memory remaining to satisfy the request,\r | |
558 | then NULL is returned.\r | |
559 | \r | |
560 | @param PoolType The type of memory to allocate.\r | |
561 | @param AllocationSize The number of bytes to allocate and zero.\r | |
562 | \r | |
563 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
564 | \r | |
565 | **/\r | |
566 | VOID *\r | |
567 | InternalAllocateZeroPool (\r | |
568 | IN EFI_MEMORY_TYPE PoolType, \r | |
569 | IN UINTN AllocationSize\r | |
570 | ) \r | |
571 | {\r | |
572 | VOID *Memory;\r | |
573 | \r | |
574 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r | |
575 | if (Memory != NULL) {\r | |
576 | Memory = ZeroMem (Memory, AllocationSize);\r | |
577 | }\r | |
578 | return Memory;\r | |
579 | }\r | |
580 | \r | |
581 | /**\r | |
582 | Allocates and zeros a buffer of type EfiBootServicesData.\r | |
583 | \r | |
584 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the\r | |
585 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
586 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
587 | request, then NULL is returned.\r | |
588 | \r | |
589 | @param AllocationSize The number of bytes to allocate and zero.\r | |
590 | \r | |
591 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
592 | \r | |
593 | **/\r | |
594 | VOID *\r | |
595 | EFIAPI\r | |
596 | AllocateZeroPool (\r | |
597 | IN UINTN AllocationSize\r | |
598 | )\r | |
599 | {\r | |
600 | VOID *Memory;\r | |
601 | \r | |
602 | Memory = AllocatePool (AllocationSize);\r | |
603 | if (Memory != NULL) {\r | |
604 | Memory = ZeroMem (Memory, AllocationSize);\r | |
605 | }\r | |
606 | return Memory;\r | |
607 | }\r | |
608 | \r | |
609 | /**\r | |
610 | Allocates and zeros a buffer of type EfiRuntimeServicesData.\r | |
611 | \r | |
612 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, clears the\r | |
613 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
614 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
615 | request, then NULL is returned.\r | |
616 | \r | |
617 | @param AllocationSize The number of bytes to allocate and zero.\r | |
618 | \r | |
619 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
620 | \r | |
621 | **/\r | |
622 | VOID *\r | |
623 | EFIAPI\r | |
624 | AllocateRuntimeZeroPool (\r | |
625 | IN UINTN AllocationSize\r | |
626 | )\r | |
627 | {\r | |
628 | return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r | |
629 | }\r | |
630 | \r | |
631 | /**\r | |
632 | Allocates and zeros a buffer of type EfiReservedMemoryType.\r | |
633 | \r | |
634 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, clears the\r | |
635 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
636 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
637 | request, then NULL is returned.\r | |
638 | \r | |
639 | @param AllocationSize The number of bytes to allocate and zero.\r | |
640 | \r | |
641 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
642 | \r | |
643 | **/\r | |
644 | VOID *\r | |
645 | EFIAPI\r | |
646 | AllocateReservedZeroPool (\r | |
647 | IN UINTN AllocationSize\r | |
648 | )\r | |
649 | {\r | |
650 | return InternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize);\r | |
651 | }\r | |
652 | \r | |
653 | /**\r | |
446b94b0 | 654 | Copies a buffer to an allocated buffer of a certain pool type.\r |
e386b444 | 655 | \r |
446b94b0 | 656 | Allocates the number bytes specified by AllocationSize of a certain pool type, copies\r |
e386b444 | 657 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r |
658 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r | |
659 | is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
660 | If Buffer is NULL, then ASSERT().\r | |
9e6fa6d2 | 661 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
e386b444 | 662 | \r |
663 | @param PoolType The type of pool to allocate.\r | |
664 | @param AllocationSize The number of bytes to allocate and zero.\r | |
665 | @param Buffer The buffer to copy to the allocated buffer.\r | |
666 | \r | |
667 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
668 | \r | |
669 | **/\r | |
670 | VOID *\r | |
671 | InternalAllocateCopyPool (\r | |
672 | IN EFI_MEMORY_TYPE PoolType, \r | |
673 | IN UINTN AllocationSize,\r | |
674 | IN CONST VOID *Buffer\r | |
675 | ) \r | |
676 | {\r | |
677 | VOID *Memory;\r | |
678 | \r | |
679 | ASSERT (Buffer != NULL);\r | |
680 | ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));\r | |
681 | \r | |
682 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r | |
683 | if (Memory != NULL) {\r | |
684 | Memory = CopyMem (Memory, Buffer, AllocationSize);\r | |
685 | }\r | |
686 | return Memory;\r | |
687 | } \r | |
688 | \r | |
689 | /**\r | |
690 | Copies a buffer to an allocated buffer of type EfiBootServicesData.\r | |
691 | \r | |
692 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, copies\r | |
693 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r | |
694 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r | |
695 | is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
9638ba6d | 696 | \r |
e386b444 | 697 | If Buffer is NULL, then ASSERT().\r |
9e6fa6d2 | 698 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
e386b444 | 699 | \r |
700 | @param AllocationSize The number of bytes to allocate and zero.\r | |
701 | @param Buffer The buffer to copy to the allocated buffer.\r | |
702 | \r | |
703 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
704 | \r | |
705 | **/\r | |
706 | VOID *\r | |
707 | EFIAPI\r | |
708 | AllocateCopyPool (\r | |
709 | IN UINTN AllocationSize,\r | |
710 | IN CONST VOID *Buffer\r | |
711 | )\r | |
712 | {\r | |
713 | VOID *Memory;\r | |
714 | \r | |
715 | ASSERT (Buffer != NULL);\r | |
716 | ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));\r | |
717 | \r | |
718 | Memory = AllocatePool (AllocationSize);\r | |
719 | if (Memory != NULL) {\r | |
720 | Memory = CopyMem (Memory, Buffer, AllocationSize);\r | |
721 | }\r | |
722 | return Memory;\r | |
723 | }\r | |
724 | \r | |
725 | /**\r | |
726 | Copies a buffer to an allocated buffer of type EfiRuntimeServicesData.\r | |
727 | \r | |
728 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, copies\r | |
729 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r | |
730 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r | |
731 | is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
9638ba6d | 732 | \r |
e386b444 | 733 | If Buffer is NULL, then ASSERT().\r |
9e6fa6d2 | 734 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
e386b444 | 735 | \r |
736 | @param AllocationSize The number of bytes to allocate and zero.\r | |
737 | @param Buffer The buffer to copy to the allocated buffer.\r | |
738 | \r | |
739 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
740 | \r | |
741 | **/\r | |
742 | VOID *\r | |
743 | EFIAPI\r | |
744 | AllocateRuntimeCopyPool (\r | |
745 | IN UINTN AllocationSize,\r | |
746 | IN CONST VOID *Buffer\r | |
747 | )\r | |
748 | {\r | |
749 | return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);\r | |
750 | }\r | |
751 | \r | |
752 | /**\r | |
753 | Copies a buffer to an allocated buffer of type EfiReservedMemoryType.\r | |
754 | \r | |
755 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, copies\r | |
756 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r | |
757 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r | |
758 | is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
9638ba6d | 759 | \r |
e386b444 | 760 | If Buffer is NULL, then ASSERT().\r |
9e6fa6d2 | 761 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
e386b444 | 762 | \r |
763 | @param AllocationSize The number of bytes to allocate and zero.\r | |
764 | @param Buffer The buffer to copy to the allocated buffer.\r | |
765 | \r | |
766 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
767 | \r | |
768 | **/\r | |
769 | VOID *\r | |
770 | EFIAPI\r | |
771 | AllocateReservedCopyPool (\r | |
772 | IN UINTN AllocationSize,\r | |
773 | IN CONST VOID *Buffer\r | |
774 | )\r | |
775 | {\r | |
776 | return InternalAllocateCopyPool (EfiReservedMemoryType, AllocationSize, Buffer);\r | |
777 | }\r | |
778 | \r | |
3b6a71fc | 779 | /**\r |
780 | Reallocates a buffer of a specified memory type.\r | |
781 | \r | |
782 | Allocates and zeros the number bytes specified by NewSize from memory of the type\r | |
783 | specified by PoolType. If OldBuffer is not NULL, then the smaller of OldSize and \r | |
784 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r | |
785 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r | |
786 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r | |
787 | enough memory remaining to satisfy the request, then NULL is returned.\r | |
788 | \r | |
56304569 | 789 | If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r |
790 | is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r | |
3b6a71fc | 791 | \r |
792 | @param PoolType The type of pool to allocate.\r | |
793 | @param OldSize The size, in bytes, of OldBuffer.\r | |
794 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
58380e9c | 795 | @param OldBuffer The buffer to copy to the allocated buffer. This is an \r |
796 | optional parameter that may be NULL.\r | |
3b6a71fc | 797 | \r |
798 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
799 | \r | |
800 | **/\r | |
801 | VOID *\r | |
3b6a71fc | 802 | InternalReallocatePool (\r |
803 | IN EFI_MEMORY_TYPE PoolType, \r | |
804 | IN UINTN OldSize,\r | |
805 | IN UINTN NewSize,\r | |
806 | IN VOID *OldBuffer OPTIONAL\r | |
807 | )\r | |
808 | {\r | |
809 | VOID *NewBuffer;\r | |
810 | \r | |
6babbe1f | 811 | NewBuffer = InternalAllocateZeroPool (PoolType, NewSize);\r |
3b6a71fc | 812 | if (NewBuffer != NULL && OldBuffer != NULL) {\r |
813 | CopyMem (NewBuffer, OldBuffer, MIN (OldSize, NewSize));\r | |
814 | FreePool (OldBuffer);\r | |
815 | }\r | |
816 | return NewBuffer;\r | |
817 | }\r | |
818 | \r | |
819 | /**\r | |
820 | Reallocates a buffer of type EfiBootServicesData.\r | |
821 | \r | |
822 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
823 | EfiBootServicesData. If OldBuffer is not NULL, then the smaller of OldSize and \r | |
824 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r | |
825 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r | |
826 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r | |
827 | enough memory remaining to satisfy the request, then NULL is returned.\r | |
828 | \r | |
56304569 | 829 | If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r |
830 | is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r | |
3b6a71fc | 831 | \r |
832 | @param OldSize The size, in bytes, of OldBuffer.\r | |
833 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
834 | @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r | |
835 | parameter that may be NULL.\r | |
836 | \r | |
837 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
838 | \r | |
839 | **/\r | |
840 | VOID *\r | |
841 | EFIAPI\r | |
842 | ReallocatePool (\r | |
843 | IN UINTN OldSize,\r | |
844 | IN UINTN NewSize,\r | |
845 | IN VOID *OldBuffer OPTIONAL\r | |
846 | )\r | |
847 | {\r | |
848 | return InternalReallocatePool (EfiBootServicesData, OldSize, NewSize, OldBuffer);\r | |
849 | }\r | |
850 | \r | |
851 | /**\r | |
852 | Reallocates a buffer of type EfiRuntimeServicesData.\r | |
853 | \r | |
854 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
855 | EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize and \r | |
856 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r | |
857 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r | |
858 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r | |
859 | enough memory remaining to satisfy the request, then NULL is returned.\r | |
860 | \r | |
56304569 | 861 | If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r |
862 | is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r | |
3b6a71fc | 863 | \r |
864 | @param OldSize The size, in bytes, of OldBuffer.\r | |
865 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
866 | @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r | |
867 | parameter that may be NULL.\r | |
868 | \r | |
869 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
870 | \r | |
871 | **/\r | |
872 | VOID *\r | |
873 | EFIAPI\r | |
874 | ReallocateRuntimePool (\r | |
875 | IN UINTN OldSize,\r | |
876 | IN UINTN NewSize,\r | |
877 | IN VOID *OldBuffer OPTIONAL\r | |
878 | )\r | |
879 | {\r | |
880 | return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);\r | |
881 | }\r | |
882 | \r | |
883 | /**\r | |
884 | Reallocates a buffer of type EfiReservedMemoryType.\r | |
885 | \r | |
886 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
887 | EfiReservedMemoryType. If OldBuffer is not NULL, then the smaller of OldSize and \r | |
888 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r | |
889 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r | |
890 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r | |
891 | enough memory remaining to satisfy the request, then NULL is returned.\r | |
2297186d | 892 | \r |
56304569 | 893 | If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r |
894 | is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r | |
3b6a71fc | 895 | \r |
896 | @param OldSize The size, in bytes, of OldBuffer.\r | |
897 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
58380e9c | 898 | @param OldBuffer The buffer to copy to the allocated buffer. This is an \r |
899 | optional parameter that may be NULL.\r | |
3b6a71fc | 900 | \r |
901 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
902 | \r | |
903 | **/\r | |
904 | VOID *\r | |
905 | EFIAPI\r | |
906 | ReallocateReservedPool (\r | |
907 | IN UINTN OldSize,\r | |
908 | IN UINTN NewSize,\r | |
909 | IN VOID *OldBuffer OPTIONAL\r | |
910 | )\r | |
911 | {\r | |
912 | return InternalReallocatePool (EfiReservedMemoryType, OldSize, NewSize, OldBuffer);\r | |
913 | }\r | |
914 | \r | |
e386b444 | 915 | /**\r |
916 | Frees a buffer that was previously allocated with one of the pool allocation functions in the\r | |
917 | Memory Allocation Library.\r | |
918 | \r | |
919 | Frees the buffer specified by Buffer. Buffer must have been allocated on a previous call to the\r | |
6e10b70a | 920 | pool allocation services of the Memory Allocation Library. If it is not possible to free pool\r |
446b94b0 | 921 | resources, then this function will perform no actions.\r |
9638ba6d | 922 | \r |
e386b444 | 923 | If Buffer was not allocated with a pool allocation function in the Memory Allocation Library,\r |
924 | then ASSERT().\r | |
925 | \r | |
2fc59a00 | 926 | @param Buffer The pointer to the buffer to free.\r |
e386b444 | 927 | \r |
928 | **/\r | |
929 | VOID\r | |
930 | EFIAPI\r | |
931 | FreePool (\r | |
932 | IN VOID *Buffer\r | |
933 | )\r | |
934 | {\r | |
935 | //\r | |
936 | // PEI phase does not support to free pool, so leave it as NOP.\r | |
937 | //\r | |
938 | }\r | |
939 | \r | |
7d582d6b | 940 | \r |