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c819c016 | 1 | /** @file\r |
9095d37b | 2 | Support routines for memory allocation routines based\r |
c819c016 | 3 | on SMM Services Table services for SMM phase drivers.\r |
9095d37b | 4 | \r |
c819c016 | 5 | The PI System Management Mode Core Interface Specification only allows the use\r |
9095d37b LG |
6 | of EfiRuntimeServicesCode and EfiRuntimeServicesData memory types for memory\r |
7 | allocations through the SMM Services Table as the SMRAM space should be\r | |
25d7db8c | 8 | reserved after BDS phase. The functions in the Memory Allocation Library use\r |
9095d37b LG |
9 | EfiBootServicesData as the default memory allocation type. For this SMM\r |
10 | specific instance of the Memory Allocation Library, EfiRuntimeServicesData\r | |
11 | is used as the default memory type for all allocations. In addition,\r | |
12 | allocation for the Reserved memory types are not supported and will always\r | |
25d7db8c | 13 | return NULL.\r |
c819c016 | 14 | \r |
9095d37b | 15 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
9344f092 | 16 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
c819c016 | 17 | \r |
18 | **/\r | |
19 | \r | |
20 | #include <PiSmm.h>\r | |
21 | \r | |
1d733f73 | 22 | #include <Protocol/SmmAccess2.h>\r |
c819c016 | 23 | #include <Library/MemoryAllocationLib.h>\r |
1d733f73 | 24 | #include <Library/UefiBootServicesTableLib.h>\r |
c819c016 | 25 | #include <Library/SmmServicesTableLib.h>\r |
26 | #include <Library/BaseMemoryLib.h>\r | |
27 | #include <Library/DebugLib.h>\r | |
28 | \r | |
1d733f73 LG |
29 | EFI_SMRAM_DESCRIPTOR *mSmramRanges;\r |
30 | UINTN mSmramRangeCount;\r | |
31 | \r | |
32 | /**\r | |
33 | The constructor function caches SMRAM ranges that are present in the system.\r | |
9095d37b | 34 | \r |
1d733f73 LG |
35 | It will ASSERT() if SMM Access2 Protocol doesn't exist.\r |
36 | It will ASSERT() if SMRAM ranges can't be got.\r | |
9095d37b | 37 | It will ASSERT() if Resource can't be allocated for cache SMRAM range.\r |
1d733f73 LG |
38 | It will always return EFI_SUCCESS.\r |
39 | \r | |
40 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
41 | @param SystemTable A pointer to the EFI System Table.\r | |
42 | \r | |
43 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
44 | \r | |
45 | **/\r | |
46 | EFI_STATUS\r | |
47 | EFIAPI\r | |
48 | SmmMemoryAllocationLibConstructor (\r | |
49 | IN EFI_HANDLE ImageHandle,\r | |
50 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
51 | )\r | |
52 | {\r | |
53 | EFI_STATUS Status;\r | |
54 | EFI_SMM_ACCESS2_PROTOCOL *SmmAccess;\r | |
55 | UINTN Size;\r | |
56 | \r | |
57 | //\r | |
58 | // Locate SMM Access2 Protocol\r | |
59 | //\r | |
60 | Status = gBS->LocateProtocol (\r | |
9095d37b LG |
61 | &gEfiSmmAccess2ProtocolGuid,\r |
62 | NULL,\r | |
1d733f73 LG |
63 | (VOID **)&SmmAccess\r |
64 | );\r | |
65 | ASSERT_EFI_ERROR (Status);\r | |
66 | \r | |
67 | //\r | |
68 | // Get SMRAM range information\r | |
69 | //\r | |
70 | Size = 0;\r | |
71 | Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL);\r | |
72 | ASSERT (Status == EFI_BUFFER_TOO_SMALL);\r | |
73 | \r | |
74 | mSmramRanges = (EFI_SMRAM_DESCRIPTOR *) AllocatePool (Size);\r | |
75 | ASSERT (mSmramRanges != NULL);\r | |
76 | \r | |
77 | Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmramRanges);\r | |
78 | ASSERT_EFI_ERROR (Status);\r | |
79 | \r | |
80 | mSmramRangeCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);\r | |
81 | \r | |
82 | return EFI_SUCCESS;\r | |
83 | }\r | |
84 | \r | |
85 | /**\r | |
9095d37b | 86 | If SMM driver exits with an error, it must call this routine\r |
1d733f73 LG |
87 | to free the allocated resource before the exiting.\r |
88 | \r | |
89 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
90 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
91 | \r | |
92 | @retval EFI_SUCCESS The deconstructor always returns EFI_SUCCESS.\r | |
93 | **/\r | |
94 | EFI_STATUS\r | |
95 | EFIAPI\r | |
96 | SmmMemoryAllocationLibDestructor (\r | |
97 | IN EFI_HANDLE ImageHandle,\r | |
98 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
99 | )\r | |
100 | {\r | |
101 | FreePool (mSmramRanges);\r | |
102 | \r | |
103 | return EFI_SUCCESS;\r | |
104 | }\r | |
105 | \r | |
106 | /**\r | |
107 | Check whether the start address of buffer is within any of the SMRAM ranges.\r | |
108 | \r | |
109 | @param[in] Buffer The pointer to the buffer to be checked.\r | |
110 | \r | |
a750b4ae | 111 | @retval TRUE The buffer is in SMRAM ranges.\r |
1d733f73 LG |
112 | @retval FALSE The buffer is out of SMRAM ranges.\r |
113 | **/\r | |
114 | BOOLEAN\r | |
115 | EFIAPI\r | |
116 | BufferInSmram (\r | |
117 | IN VOID *Buffer\r | |
118 | )\r | |
119 | {\r | |
120 | UINTN Index;\r | |
121 | \r | |
122 | for (Index = 0; Index < mSmramRangeCount; Index ++) {\r | |
9095d37b | 123 | if (((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer >= mSmramRanges[Index].CpuStart) &&\r |
1d733f73 LG |
124 | ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer < (mSmramRanges[Index].CpuStart + mSmramRanges[Index].PhysicalSize))) {\r |
125 | return TRUE;\r | |
126 | }\r | |
127 | }\r | |
128 | \r | |
129 | return FALSE;\r | |
130 | }\r | |
131 | \r | |
c819c016 | 132 | /**\r |
133 | Allocates one or more 4KB pages of a certain memory type.\r | |
134 | \r | |
9095d37b LG |
135 | Allocates the number of 4KB pages of a certain memory type and returns a pointer\r |
136 | to the allocated buffer. The buffer returned is aligned on a 4KB boundary. If\r | |
137 | Pages is 0, then NULL is returned. If there is not enough memory remaining to\r | |
58380e9c | 138 | satisfy the request, then NULL is returned.\r |
c819c016 | 139 | \r |
140 | @param MemoryType The type of memory to allocate.\r | |
141 | @param Pages The number of 4 KB pages to allocate.\r | |
142 | \r | |
143 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
144 | \r | |
145 | **/\r | |
146 | VOID *\r | |
147 | InternalAllocatePages (\r | |
9095d37b | 148 | IN EFI_MEMORY_TYPE MemoryType,\r |
c819c016 | 149 | IN UINTN Pages\r |
150 | )\r | |
151 | {\r | |
152 | EFI_STATUS Status;\r | |
9095d37b | 153 | EFI_PHYSICAL_ADDRESS Memory;\r |
c819c016 | 154 | \r |
155 | if (Pages == 0) {\r | |
156 | return NULL;\r | |
157 | }\r | |
158 | \r | |
159 | Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r | |
160 | if (EFI_ERROR (Status)) {\r | |
161 | return NULL;\r | |
162 | }\r | |
163 | return (VOID *) (UINTN) Memory;\r | |
164 | }\r | |
165 | \r | |
166 | /**\r | |
25d7db8c | 167 | Allocates one or more 4KB pages of type EfiRuntimeServicesData.\r |
c819c016 | 168 | \r |
9095d37b LG |
169 | Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer\r |
170 | to the allocated buffer. The buffer returned is aligned on a 4KB boundary. If\r | |
171 | Pages is 0, then NULL is returned. If there is not enough memory remaining to\r | |
58380e9c | 172 | satisfy the request, then NULL is returned.\r |
c819c016 | 173 | \r |
174 | @param Pages The number of 4 KB pages to allocate.\r | |
175 | \r | |
176 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
177 | \r | |
178 | **/\r | |
179 | VOID *\r | |
180 | EFIAPI\r | |
181 | AllocatePages (\r | |
182 | IN UINTN Pages\r | |
183 | )\r | |
184 | {\r | |
185 | return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r | |
186 | }\r | |
187 | \r | |
188 | /**\r | |
189 | Allocates one or more 4KB pages of type EfiRuntimeServicesData.\r | |
190 | \r | |
9095d37b LG |
191 | Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a\r |
192 | pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.\r | |
193 | If Pages is 0, then NULL is returned. If there is not enough memory remaining\r | |
58380e9c | 194 | to satisfy the request, then NULL is returned.\r |
c819c016 | 195 | \r |
196 | @param Pages The number of 4 KB pages to allocate.\r | |
197 | \r | |
198 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
199 | \r | |
200 | **/\r | |
201 | VOID *\r | |
202 | EFIAPI\r | |
203 | AllocateRuntimePages (\r | |
204 | IN UINTN Pages\r | |
205 | )\r | |
206 | {\r | |
207 | return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r | |
208 | }\r | |
209 | \r | |
210 | /**\r | |
211 | Allocates one or more 4KB pages of type EfiReservedMemoryType.\r | |
212 | \r | |
9095d37b LG |
213 | Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a\r |
214 | pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.\r | |
215 | If Pages is 0, then NULL is returned. If there is not enough memory remaining\r | |
58380e9c | 216 | to satisfy the request, then NULL is returned.\r |
c819c016 | 217 | \r |
218 | @param Pages The number of 4 KB pages to allocate.\r | |
219 | \r | |
220 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
221 | \r | |
222 | **/\r | |
223 | VOID *\r | |
224 | EFIAPI\r | |
225 | AllocateReservedPages (\r | |
226 | IN UINTN Pages\r | |
227 | )\r | |
228 | {\r | |
229 | return NULL;\r | |
230 | }\r | |
231 | \r | |
232 | /**\r | |
233 | Frees one or more 4KB pages that were previously allocated with one of the page allocation\r | |
234 | functions in the Memory Allocation Library.\r | |
235 | \r | |
9095d37b LG |
236 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer.\r |
237 | Buffer must have been allocated on a previous call to the page allocation services\r | |
238 | of the Memory Allocation Library. If it is not possible to free allocated pages,\r | |
58380e9c | 239 | then this function will perform no actions.\r |
9095d37b LG |
240 | \r |
241 | If Buffer was not allocated with a page allocation function in the Memory Allocation\r | |
58380e9c | 242 | Library, then ASSERT().\r |
c819c016 | 243 | If Pages is zero, then ASSERT().\r |
9095d37b | 244 | \r |
2fc59a00 | 245 | @param Buffer The pointer to the buffer of pages to free.\r |
c819c016 | 246 | @param Pages The number of 4 KB pages to free.\r |
247 | \r | |
248 | **/\r | |
249 | VOID\r | |
250 | EFIAPI\r | |
251 | FreePages (\r | |
252 | IN VOID *Buffer,\r | |
253 | IN UINTN Pages\r | |
254 | )\r | |
255 | {\r | |
256 | EFI_STATUS Status;\r | |
257 | \r | |
258 | ASSERT (Pages != 0);\r | |
1d733f73 LG |
259 | if (BufferInSmram (Buffer)) {\r |
260 | //\r | |
261 | // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePages() service.\r | |
262 | // So, gSmst->SmmFreePages() service is used to free it.\r | |
263 | //\r | |
264 | Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
265 | } else {\r | |
266 | //\r | |
267 | // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePages() service.\r | |
268 | // So, gBS->FreePages() service is used to free it.\r | |
269 | //\r | |
270 | Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
271 | }\r | |
c819c016 | 272 | ASSERT_EFI_ERROR (Status);\r |
273 | }\r | |
274 | \r | |
275 | /**\r | |
276 | Allocates one or more 4KB pages of a certain memory type at a specified alignment.\r | |
277 | \r | |
9095d37b LG |
278 | Allocates the number of 4KB pages specified by Pages of a certain memory type\r |
279 | with an alignment specified by Alignment. The allocated buffer is returned.\r | |
280 | If Pages is 0, then NULL is returned. If there is not enough memory at the\r | |
58380e9c | 281 | specified alignment remaining to satisfy the request, then NULL is returned.\r |
c819c016 | 282 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
1346352d | 283 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
c819c016 | 284 | \r |
285 | @param MemoryType The type of memory to allocate.\r | |
286 | @param Pages The number of 4 KB pages to allocate.\r | |
9095d37b | 287 | @param Alignment The requested alignment of the allocation.\r |
58380e9c | 288 | Must be a power of two.\r |
c819c016 | 289 | If Alignment is zero, then byte alignment is used.\r |
290 | \r | |
291 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
292 | \r | |
293 | **/\r | |
294 | VOID *\r | |
295 | InternalAllocateAlignedPages (\r | |
9095d37b | 296 | IN EFI_MEMORY_TYPE MemoryType,\r |
c819c016 | 297 | IN UINTN Pages,\r |
298 | IN UINTN Alignment\r | |
299 | )\r | |
300 | {\r | |
301 | EFI_STATUS Status;\r | |
302 | EFI_PHYSICAL_ADDRESS Memory;\r | |
303 | UINTN AlignedMemory;\r | |
304 | UINTN AlignmentMask;\r | |
305 | UINTN UnalignedPages;\r | |
306 | UINTN RealPages;\r | |
307 | \r | |
308 | //\r | |
309 | // Alignment must be a power of two or zero.\r | |
310 | //\r | |
311 | ASSERT ((Alignment & (Alignment - 1)) == 0);\r | |
9095d37b | 312 | \r |
c819c016 | 313 | if (Pages == 0) {\r |
314 | return NULL;\r | |
315 | }\r | |
316 | if (Alignment > EFI_PAGE_SIZE) {\r | |
317 | //\r | |
4f953ed7 | 318 | // Calculate the total number of pages since alignment is larger than page size.\r |
c819c016 | 319 | //\r |
320 | AlignmentMask = Alignment - 1;\r | |
321 | RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);\r | |
322 | //\r | |
323 | // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.\r | |
324 | //\r | |
325 | ASSERT (RealPages > Pages);\r | |
9095d37b | 326 | \r |
c819c016 | 327 | Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);\r |
328 | if (EFI_ERROR (Status)) {\r | |
329 | return NULL;\r | |
330 | }\r | |
331 | AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;\r | |
332 | UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN) Memory);\r | |
333 | if (UnalignedPages > 0) {\r | |
334 | //\r | |
335 | // Free first unaligned page(s).\r | |
336 | //\r | |
337 | Status = gSmst->SmmFreePages (Memory, UnalignedPages);\r | |
338 | ASSERT_EFI_ERROR (Status);\r | |
339 | }\r | |
95ba3d92 | 340 | Memory = AlignedMemory + EFI_PAGES_TO_SIZE (Pages);\r |
c819c016 | 341 | UnalignedPages = RealPages - Pages - UnalignedPages;\r |
342 | if (UnalignedPages > 0) {\r | |
343 | //\r | |
344 | // Free last unaligned page(s).\r | |
345 | //\r | |
346 | Status = gSmst->SmmFreePages (Memory, UnalignedPages);\r | |
347 | ASSERT_EFI_ERROR (Status);\r | |
348 | }\r | |
349 | } else {\r | |
350 | //\r | |
351 | // Do not over-allocate pages in this case.\r | |
352 | //\r | |
353 | Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r | |
354 | if (EFI_ERROR (Status)) {\r | |
355 | return NULL;\r | |
356 | }\r | |
357 | AlignedMemory = (UINTN) Memory;\r | |
358 | }\r | |
359 | return (VOID *) AlignedMemory;\r | |
360 | }\r | |
361 | \r | |
362 | /**\r | |
25d7db8c | 363 | Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.\r |
c819c016 | 364 | \r |
9095d37b LG |
365 | Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData\r |
366 | with an alignment specified by Alignment. The allocated buffer is returned.\r | |
367 | If Pages is 0, then NULL is returned. If there is not enough memory at the\r | |
58380e9c | 368 | specified alignment remaining to satisfy the request, then NULL is returned.\r |
9095d37b | 369 | \r |
c819c016 | 370 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
1346352d | 371 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
c819c016 | 372 | \r |
373 | @param Pages The number of 4 KB pages to allocate.\r | |
9095d37b | 374 | @param Alignment The requested alignment of the allocation.\r |
58380e9c | 375 | Must be a power of two.\r |
c819c016 | 376 | If Alignment is zero, then byte alignment is used.\r |
377 | \r | |
378 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
379 | \r | |
380 | **/\r | |
381 | VOID *\r | |
382 | EFIAPI\r | |
383 | AllocateAlignedPages (\r | |
384 | IN UINTN Pages,\r | |
385 | IN UINTN Alignment\r | |
386 | )\r | |
387 | {\r | |
388 | return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r | |
389 | }\r | |
390 | \r | |
391 | /**\r | |
392 | Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.\r | |
393 | \r | |
9095d37b LG |
394 | Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData\r |
395 | with an alignment specified by Alignment. The allocated buffer is returned.\r | |
396 | If Pages is 0, then NULL is returned. If there is not enough memory at the\r | |
58380e9c | 397 | specified alignment remaining to satisfy the request, then NULL is returned.\r |
9095d37b | 398 | \r |
c819c016 | 399 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
1346352d | 400 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
c819c016 | 401 | \r |
402 | @param Pages The number of 4 KB pages to allocate.\r | |
9095d37b | 403 | @param Alignment The requested alignment of the allocation.\r |
58380e9c | 404 | Must be a power of two.\r |
c819c016 | 405 | If Alignment is zero, then byte alignment is used.\r |
406 | \r | |
407 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
408 | \r | |
409 | **/\r | |
410 | VOID *\r | |
411 | EFIAPI\r | |
412 | AllocateAlignedRuntimePages (\r | |
413 | IN UINTN Pages,\r | |
414 | IN UINTN Alignment\r | |
415 | )\r | |
416 | {\r | |
417 | return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r | |
418 | }\r | |
419 | \r | |
420 | /**\r | |
421 | Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.\r | |
422 | \r | |
9095d37b LG |
423 | Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType\r |
424 | with an alignment specified by Alignment. The allocated buffer is returned.\r | |
425 | If Pages is 0, then NULL is returned. If there is not enough memory at the\r | |
58380e9c | 426 | specified alignment remaining to satisfy the request, then NULL is returned.\r |
9095d37b | 427 | \r |
c819c016 | 428 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
1346352d | 429 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
c819c016 | 430 | \r |
431 | @param Pages The number of 4 KB pages to allocate.\r | |
9095d37b | 432 | @param Alignment The requested alignment of the allocation.\r |
58380e9c | 433 | Must be a power of two.\r |
c819c016 | 434 | If Alignment is zero, then byte alignment is used.\r |
435 | \r | |
436 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
437 | \r | |
438 | **/\r | |
439 | VOID *\r | |
440 | EFIAPI\r | |
441 | AllocateAlignedReservedPages (\r | |
442 | IN UINTN Pages,\r | |
443 | IN UINTN Alignment\r | |
444 | )\r | |
445 | {\r | |
446 | return NULL;\r | |
447 | }\r | |
448 | \r | |
449 | /**\r | |
450 | Frees one or more 4KB pages that were previously allocated with one of the aligned page\r | |
451 | allocation functions in the Memory Allocation Library.\r | |
452 | \r | |
9095d37b LG |
453 | Frees the number of 4KB pages specified by Pages from the buffer specified by\r |
454 | Buffer. Buffer must have been allocated on a previous call to the aligned page\r | |
455 | allocation services of the Memory Allocation Library. If it is not possible to\r | |
58380e9c | 456 | free allocated pages, then this function will perform no actions.\r |
9095d37b LG |
457 | \r |
458 | If Buffer was not allocated with an aligned page allocation function in the\r | |
58380e9c | 459 | Memory Allocation Library, then ASSERT().\r |
c819c016 | 460 | If Pages is zero, then ASSERT().\r |
9095d37b | 461 | \r |
2fc59a00 | 462 | @param Buffer The pointer to the buffer of pages to free.\r |
c819c016 | 463 | @param Pages The number of 4 KB pages to free.\r |
464 | \r | |
465 | **/\r | |
466 | VOID\r | |
467 | EFIAPI\r | |
468 | FreeAlignedPages (\r | |
469 | IN VOID *Buffer,\r | |
470 | IN UINTN Pages\r | |
471 | )\r | |
472 | {\r | |
473 | EFI_STATUS Status;\r | |
474 | \r | |
475 | ASSERT (Pages != 0);\r | |
1d733f73 LG |
476 | if (BufferInSmram (Buffer)) {\r |
477 | //\r | |
478 | // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePages() service.\r | |
479 | // So, gSmst->SmmFreePages() service is used to free it.\r | |
480 | //\r | |
481 | Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
482 | } else {\r | |
483 | //\r | |
484 | // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePages() service.\r | |
485 | // So, gBS->FreePages() service is used to free it.\r | |
486 | //\r | |
487 | Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
488 | }\r | |
c819c016 | 489 | ASSERT_EFI_ERROR (Status);\r |
490 | }\r | |
491 | \r | |
492 | /**\r | |
493 | Allocates a buffer of a certain pool type.\r | |
494 | \r | |
9095d37b LG |
495 | Allocates the number bytes specified by AllocationSize of a certain pool type\r |
496 | and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
497 | valid buffer of 0 size is returned. If there is not enough memory remaining to\r | |
58380e9c | 498 | satisfy the request, then NULL is returned.\r |
c819c016 | 499 | \r |
500 | @param MemoryType The type of memory to allocate.\r | |
501 | @param AllocationSize The number of bytes to allocate.\r | |
502 | \r | |
503 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
504 | \r | |
505 | **/\r | |
506 | VOID *\r | |
507 | InternalAllocatePool (\r | |
9095d37b | 508 | IN EFI_MEMORY_TYPE MemoryType,\r |
c819c016 | 509 | IN UINTN AllocationSize\r |
510 | )\r | |
511 | {\r | |
512 | EFI_STATUS Status;\r | |
513 | VOID *Memory;\r | |
514 | \r | |
515 | Status = gSmst->SmmAllocatePool (MemoryType, AllocationSize, &Memory);\r | |
516 | if (EFI_ERROR (Status)) {\r | |
517 | Memory = NULL;\r | |
518 | }\r | |
519 | return Memory;\r | |
520 | }\r | |
521 | \r | |
522 | /**\r | |
25d7db8c | 523 | Allocates a buffer of type EfiRuntimeServicesData.\r |
c819c016 | 524 | \r |
9095d37b LG |
525 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData\r |
526 | and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
527 | valid buffer of 0 size is returned. If there is not enough memory remaining to\r | |
58380e9c | 528 | satisfy the request, then NULL is returned.\r |
c819c016 | 529 | \r |
530 | @param AllocationSize The number of bytes to allocate.\r | |
531 | \r | |
532 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
533 | \r | |
534 | **/\r | |
535 | VOID *\r | |
536 | EFIAPI\r | |
537 | AllocatePool (\r | |
538 | IN UINTN AllocationSize\r | |
539 | )\r | |
540 | {\r | |
541 | return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r | |
542 | }\r | |
543 | \r | |
544 | /**\r | |
545 | Allocates a buffer of type EfiRuntimeServicesData.\r | |
546 | \r | |
9095d37b LG |
547 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData\r |
548 | and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
549 | valid buffer of 0 size is returned. If there is not enough memory remaining to\r | |
58380e9c | 550 | satisfy the request, then NULL is returned.\r |
c819c016 | 551 | \r |
552 | @param AllocationSize The number of bytes to allocate.\r | |
553 | \r | |
554 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
555 | \r | |
556 | **/\r | |
557 | VOID *\r | |
558 | EFIAPI\r | |
559 | AllocateRuntimePool (\r | |
560 | IN UINTN AllocationSize\r | |
561 | )\r | |
562 | {\r | |
563 | return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r | |
564 | }\r | |
565 | \r | |
566 | /**\r | |
567 | Allocates a buffer of type EfiReservedMemoryType.\r | |
568 | \r | |
9095d37b LG |
569 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType\r |
570 | and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
571 | valid buffer of 0 size is returned. If there is not enough memory remaining to\r | |
58380e9c | 572 | satisfy the request, then NULL is returned.\r |
c819c016 | 573 | \r |
574 | @param AllocationSize The number of bytes to allocate.\r | |
575 | \r | |
576 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
577 | \r | |
578 | **/\r | |
579 | VOID *\r | |
580 | EFIAPI\r | |
581 | AllocateReservedPool (\r | |
582 | IN UINTN AllocationSize\r | |
583 | )\r | |
584 | {\r | |
585 | return NULL;\r | |
586 | }\r | |
587 | \r | |
588 | /**\r | |
589 | Allocates and zeros a buffer of a certain pool type.\r | |
590 | \r | |
9095d37b LG |
591 | Allocates the number bytes specified by AllocationSize of a certain pool type,\r |
592 | clears the buffer with zeros, and returns a pointer to the allocated buffer.\r | |
593 | If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is\r | |
58380e9c | 594 | not enough memory remaining to satisfy the request, then NULL is returned.\r |
c819c016 | 595 | \r |
596 | @param PoolType The type of memory to allocate.\r | |
597 | @param AllocationSize The number of bytes to allocate and zero.\r | |
598 | \r | |
599 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
600 | \r | |
601 | **/\r | |
602 | VOID *\r | |
603 | InternalAllocateZeroPool (\r | |
9095d37b | 604 | IN EFI_MEMORY_TYPE PoolType,\r |
c819c016 | 605 | IN UINTN AllocationSize\r |
9095d37b | 606 | )\r |
c819c016 | 607 | {\r |
608 | VOID *Memory;\r | |
609 | \r | |
610 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r | |
611 | if (Memory != NULL) {\r | |
612 | Memory = ZeroMem (Memory, AllocationSize);\r | |
613 | }\r | |
614 | return Memory;\r | |
615 | }\r | |
616 | \r | |
617 | /**\r | |
25d7db8c | 618 | Allocates and zeros a buffer of type EfiRuntimeServicesData.\r |
c819c016 | 619 | \r |
9095d37b LG |
620 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData,\r |
621 | clears the buffer with zeros, and returns a pointer to the allocated buffer.\r | |
622 | If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is\r | |
58380e9c | 623 | not enough memory remaining to satisfy the request, then NULL is returned.\r |
c819c016 | 624 | \r |
625 | @param AllocationSize The number of bytes to allocate and zero.\r | |
626 | \r | |
627 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
628 | \r | |
629 | **/\r | |
630 | VOID *\r | |
631 | EFIAPI\r | |
632 | AllocateZeroPool (\r | |
633 | IN UINTN AllocationSize\r | |
634 | )\r | |
635 | {\r | |
636 | return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r | |
637 | }\r | |
638 | \r | |
639 | /**\r | |
640 | Allocates and zeros a buffer of type EfiRuntimeServicesData.\r | |
641 | \r | |
9095d37b LG |
642 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData,\r |
643 | clears the buffer with zeros, and returns a pointer to the allocated buffer.\r | |
644 | If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is\r | |
58380e9c | 645 | not enough memory remaining to satisfy the request, then NULL is returned.\r |
c819c016 | 646 | \r |
647 | @param AllocationSize The number of bytes to allocate and zero.\r | |
648 | \r | |
649 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
650 | \r | |
651 | **/\r | |
652 | VOID *\r | |
653 | EFIAPI\r | |
654 | AllocateRuntimeZeroPool (\r | |
655 | IN UINTN AllocationSize\r | |
656 | )\r | |
657 | {\r | |
658 | return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r | |
659 | }\r | |
660 | \r | |
661 | /**\r | |
662 | Allocates and zeros a buffer of type EfiReservedMemoryType.\r | |
663 | \r | |
9095d37b LG |
664 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType,\r |
665 | clears the buffer with zeros, and returns a pointer to the allocated buffer.\r | |
666 | If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is\r | |
58380e9c | 667 | not enough memory remaining to satisfy the request, then NULL is returned.\r |
c819c016 | 668 | \r |
669 | @param AllocationSize The number of bytes to allocate and zero.\r | |
670 | \r | |
671 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
672 | \r | |
673 | **/\r | |
674 | VOID *\r | |
675 | EFIAPI\r | |
676 | AllocateReservedZeroPool (\r | |
677 | IN UINTN AllocationSize\r | |
678 | )\r | |
679 | {\r | |
680 | return NULL;\r | |
681 | }\r | |
682 | \r | |
683 | /**\r | |
684 | Copies a buffer to an allocated buffer of a certain pool type.\r | |
685 | \r | |
9095d37b LG |
686 | Allocates the number bytes specified by AllocationSize of a certain pool type,\r |
687 | copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns\r | |
688 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer\r | |
689 | of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
58380e9c | 690 | request, then NULL is returned. If Buffer is NULL, then ASSERT().\r |
9095d37b | 691 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
c819c016 | 692 | \r |
693 | @param PoolType The type of pool to allocate.\r | |
694 | @param AllocationSize The number of bytes to allocate and zero.\r | |
695 | @param Buffer The buffer to copy to the allocated buffer.\r | |
696 | \r | |
697 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
698 | \r | |
699 | **/\r | |
700 | VOID *\r | |
701 | InternalAllocateCopyPool (\r | |
9095d37b | 702 | IN EFI_MEMORY_TYPE PoolType,\r |
c819c016 | 703 | IN UINTN AllocationSize,\r |
704 | IN CONST VOID *Buffer\r | |
9095d37b | 705 | )\r |
c819c016 | 706 | {\r |
707 | VOID *Memory;\r | |
708 | \r | |
709 | ASSERT (Buffer != NULL);\r | |
710 | ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));\r | |
711 | \r | |
712 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r | |
713 | if (Memory != NULL) {\r | |
714 | Memory = CopyMem (Memory, Buffer, AllocationSize);\r | |
715 | }\r | |
716 | return Memory;\r | |
9095d37b | 717 | }\r |
c819c016 | 718 | \r |
719 | /**\r | |
25d7db8c | 720 | Copies a buffer to an allocated buffer of type EfiRuntimeServicesData.\r |
c819c016 | 721 | \r |
9095d37b LG |
722 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData,\r |
723 | copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns\r | |
724 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer\r | |
725 | of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
58380e9c | 726 | request, then NULL is returned.\r |
9095d37b | 727 | \r |
c819c016 | 728 | If Buffer is NULL, then ASSERT().\r |
9095d37b | 729 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
c819c016 | 730 | \r |
731 | @param AllocationSize The number of bytes to allocate and zero.\r | |
732 | @param Buffer The buffer to copy to the allocated buffer.\r | |
733 | \r | |
734 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
735 | \r | |
736 | **/\r | |
737 | VOID *\r | |
738 | EFIAPI\r | |
739 | AllocateCopyPool (\r | |
740 | IN UINTN AllocationSize,\r | |
741 | IN CONST VOID *Buffer\r | |
742 | )\r | |
743 | {\r | |
744 | return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);\r | |
745 | }\r | |
746 | \r | |
747 | /**\r | |
748 | Copies a buffer to an allocated buffer of type EfiRuntimeServicesData.\r | |
749 | \r | |
9095d37b LG |
750 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData,\r |
751 | copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns\r | |
752 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer\r | |
753 | of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
58380e9c | 754 | request, then NULL is returned.\r |
9095d37b | 755 | \r |
c819c016 | 756 | If Buffer is NULL, then ASSERT().\r |
9095d37b | 757 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
c819c016 | 758 | \r |
759 | @param AllocationSize The number of bytes to allocate and zero.\r | |
760 | @param Buffer The buffer to copy to the allocated buffer.\r | |
761 | \r | |
762 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
763 | \r | |
764 | **/\r | |
765 | VOID *\r | |
766 | EFIAPI\r | |
767 | AllocateRuntimeCopyPool (\r | |
768 | IN UINTN AllocationSize,\r | |
769 | IN CONST VOID *Buffer\r | |
770 | )\r | |
771 | {\r | |
772 | return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);\r | |
773 | }\r | |
774 | \r | |
775 | /**\r | |
776 | Copies a buffer to an allocated buffer of type EfiReservedMemoryType.\r | |
777 | \r | |
9095d37b LG |
778 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType,\r |
779 | copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns\r | |
780 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer\r | |
781 | of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
58380e9c | 782 | request, then NULL is returned.\r |
9095d37b | 783 | \r |
c819c016 | 784 | If Buffer is NULL, then ASSERT().\r |
9095d37b | 785 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
c819c016 | 786 | \r |
787 | @param AllocationSize The number of bytes to allocate and zero.\r | |
788 | @param Buffer The buffer to copy to the allocated buffer.\r | |
789 | \r | |
790 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
791 | \r | |
792 | **/\r | |
793 | VOID *\r | |
794 | EFIAPI\r | |
795 | AllocateReservedCopyPool (\r | |
796 | IN UINTN AllocationSize,\r | |
797 | IN CONST VOID *Buffer\r | |
798 | )\r | |
799 | {\r | |
800 | return NULL;\r | |
801 | }\r | |
802 | \r | |
803 | /**\r | |
804 | Reallocates a buffer of a specified memory type.\r | |
805 | \r | |
806 | Allocates and zeros the number bytes specified by NewSize from memory of the type\r | |
9095d37b LG |
807 | specified by PoolType. If OldBuffer is not NULL, then the smaller of OldSize and\r |
808 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and\r | |
809 | OldBuffer is freed. A pointer to the newly allocated buffer is returned.\r | |
810 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not\r | |
c819c016 | 811 | enough memory remaining to satisfy the request, then NULL is returned.\r |
9095d37b LG |
812 | \r |
813 | If the allocation of the new buffer is successful and the smaller of NewSize\r | |
58380e9c | 814 | and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r |
c819c016 | 815 | \r |
816 | @param PoolType The type of pool to allocate.\r | |
817 | @param OldSize The size, in bytes, of OldBuffer.\r | |
818 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
9095d37b | 819 | @param OldBuffer The buffer to copy to the allocated buffer. This is an\r |
58380e9c | 820 | optional parameter that may be NULL.\r |
c819c016 | 821 | \r |
822 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
823 | \r | |
824 | **/\r | |
825 | VOID *\r | |
826 | InternalReallocatePool (\r | |
9095d37b | 827 | IN EFI_MEMORY_TYPE PoolType,\r |
c819c016 | 828 | IN UINTN OldSize,\r |
829 | IN UINTN NewSize,\r | |
830 | IN VOID *OldBuffer OPTIONAL\r | |
831 | )\r | |
832 | {\r | |
833 | VOID *NewBuffer;\r | |
834 | \r | |
835 | NewBuffer = InternalAllocateZeroPool (PoolType, NewSize);\r | |
836 | if (NewBuffer != NULL && OldBuffer != NULL) {\r | |
837 | CopyMem (NewBuffer, OldBuffer, MIN (OldSize, NewSize));\r | |
838 | FreePool (OldBuffer);\r | |
839 | }\r | |
840 | return NewBuffer;\r | |
841 | }\r | |
842 | \r | |
843 | /**\r | |
25d7db8c | 844 | Reallocates a buffer of type EfiRuntimeServicesData.\r |
c819c016 | 845 | \r |
846 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
9095d37b LG |
847 | EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize and\r |
848 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and\r | |
849 | OldBuffer is freed. A pointer to the newly allocated buffer is returned.\r | |
850 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not\r | |
c819c016 | 851 | enough memory remaining to satisfy the request, then NULL is returned.\r |
9095d37b LG |
852 | \r |
853 | If the allocation of the new buffer is successful and the smaller of NewSize\r | |
58380e9c | 854 | and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r |
c819c016 | 855 | \r |
856 | @param OldSize The size, in bytes, of OldBuffer.\r | |
857 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
9095d37b | 858 | @param OldBuffer The buffer to copy to the allocated buffer. This is an\r |
58380e9c | 859 | optional parameter that may be NULL.\r |
c819c016 | 860 | \r |
861 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
862 | \r | |
863 | **/\r | |
864 | VOID *\r | |
865 | EFIAPI\r | |
866 | ReallocatePool (\r | |
867 | IN UINTN OldSize,\r | |
868 | IN UINTN NewSize,\r | |
869 | IN VOID *OldBuffer OPTIONAL\r | |
870 | )\r | |
871 | {\r | |
872 | return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);\r | |
873 | }\r | |
874 | \r | |
875 | /**\r | |
876 | Reallocates a buffer of type EfiRuntimeServicesData.\r | |
877 | \r | |
878 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
9095d37b LG |
879 | EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize\r |
880 | and NewSize bytes are copied from OldBuffer to the newly allocated buffer, and\r | |
881 | OldBuffer is freed. A pointer to the newly allocated buffer is returned.\r | |
882 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not\r | |
c819c016 | 883 | enough memory remaining to satisfy the request, then NULL is returned.\r |
884 | \r | |
9095d37b | 885 | If the allocation of the new buffer is successful and the smaller of NewSize\r |
58380e9c | 886 | and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r |
c819c016 | 887 | \r |
888 | @param OldSize The size, in bytes, of OldBuffer.\r | |
889 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
9095d37b | 890 | @param OldBuffer The buffer to copy to the allocated buffer. This is an\r |
58380e9c | 891 | optional parameter that may be NULL.\r |
c819c016 | 892 | \r |
893 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
894 | \r | |
895 | **/\r | |
896 | VOID *\r | |
897 | EFIAPI\r | |
898 | ReallocateRuntimePool (\r | |
899 | IN UINTN OldSize,\r | |
900 | IN UINTN NewSize,\r | |
901 | IN VOID *OldBuffer OPTIONAL\r | |
902 | )\r | |
903 | {\r | |
904 | return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);\r | |
905 | }\r | |
906 | \r | |
907 | /**\r | |
908 | Reallocates a buffer of type EfiReservedMemoryType.\r | |
909 | \r | |
910 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
9095d37b LG |
911 | EfiReservedMemoryType. If OldBuffer is not NULL, then the smaller of OldSize\r |
912 | and NewSize bytes are copied from OldBuffer to the newly allocated buffer, and\r | |
913 | OldBuffer is freed. A pointer to the newly allocated buffer is returned.\r | |
914 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not\r | |
c819c016 | 915 | enough memory remaining to satisfy the request, then NULL is returned.\r |
916 | \r | |
9095d37b | 917 | If the allocation of the new buffer is successful and the smaller of NewSize\r |
58380e9c | 918 | and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r |
c819c016 | 919 | \r |
920 | @param OldSize The size, in bytes, of OldBuffer.\r | |
921 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
9095d37b | 922 | @param OldBuffer The buffer to copy to the allocated buffer. This is an\r |
58380e9c | 923 | optional parameter that may be NULL.\r |
c819c016 | 924 | \r |
925 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
926 | \r | |
927 | **/\r | |
928 | VOID *\r | |
929 | EFIAPI\r | |
930 | ReallocateReservedPool (\r | |
931 | IN UINTN OldSize,\r | |
932 | IN UINTN NewSize,\r | |
933 | IN VOID *OldBuffer OPTIONAL\r | |
934 | )\r | |
935 | {\r | |
936 | return NULL;\r | |
937 | }\r | |
938 | \r | |
939 | /**\r | |
9095d37b | 940 | Frees a buffer that was previously allocated with one of the pool allocation\r |
58380e9c | 941 | functions in the Memory Allocation Library.\r |
c819c016 | 942 | \r |
9095d37b LG |
943 | Frees the buffer specified by Buffer. Buffer must have been allocated on a\r |
944 | previous call to the pool allocation services of the Memory Allocation Library.\r | |
945 | If it is not possible to free pool resources, then this function will perform\r | |
58380e9c | 946 | no actions.\r |
9095d37b LG |
947 | \r |
948 | If Buffer was not allocated with a pool allocation function in the Memory\r | |
58380e9c | 949 | Allocation Library, then ASSERT().\r |
c819c016 | 950 | \r |
2fc59a00 | 951 | @param Buffer The pointer to the buffer to free.\r |
c819c016 | 952 | \r |
953 | **/\r | |
954 | VOID\r | |
955 | EFIAPI\r | |
956 | FreePool (\r | |
957 | IN VOID *Buffer\r | |
958 | )\r | |
959 | {\r | |
960 | EFI_STATUS Status;\r | |
961 | \r | |
1d733f73 LG |
962 | if (BufferInSmram (Buffer)) {\r |
963 | //\r | |
964 | // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePool() service.\r | |
965 | // So, gSmst->SmmFreePool() service is used to free it.\r | |
966 | //\r | |
967 | Status = gSmst->SmmFreePool (Buffer);\r | |
968 | } else {\r | |
969 | //\r | |
970 | // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePool() service.\r | |
971 | // So, gBS->FreePool() service is used to free it.\r | |
972 | //\r | |
973 | Status = gBS->FreePool (Buffer);\r | |
974 | }\r | |
c819c016 | 975 | ASSERT_EFI_ERROR (Status);\r |
976 | }\r |