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c819c016 | 1 | /** @file\r |
2 | Support routines for memory allocation routines based \r | |
3 | on SMM Services Table services for SMM phase drivers.\r | |
4 | \r | |
5 | The PI System Management Mode Core Interface Specification only allows the use\r | |
6 | of EfiRuntimeServicesCode and EfiRuntimeServicesData memory types for memory \r | |
7 | allocations through the SMM Services Table. The functions in the Memory \r | |
8 | Allocation Library use EfiBootServicesData as the default memory allocation\r | |
9 | type. For this SMM specific instance of the Memory Allocation Library, \r | |
10 | EfiRuntimeServicesData is used as the default memory type for all allocations.\r | |
11 | In addition, allocation for the Reserved memory types are not supported and \r | |
12 | will always return NULL.\r | |
13 | \r | |
4f953ed7 | 14 | Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r |
19388d29 | 15 | This program and the accompanying materials \r |
c819c016 | 16 | are licensed and made available under the terms and conditions of the BSD License \r |
17 | which accompanies this distribution. The full text of the license may be found at \r | |
2fc59a00 | 18 | http://opensource.org/licenses/bsd-license.php. \r |
c819c016 | 19 | \r |
20 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
21 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
22 | \r | |
23 | **/\r | |
24 | \r | |
25 | #include <PiSmm.h>\r | |
26 | \r | |
1d733f73 | 27 | #include <Protocol/SmmAccess2.h>\r |
c819c016 | 28 | #include <Library/MemoryAllocationLib.h>\r |
1d733f73 | 29 | #include <Library/UefiBootServicesTableLib.h>\r |
c819c016 | 30 | #include <Library/SmmServicesTableLib.h>\r |
31 | #include <Library/BaseMemoryLib.h>\r | |
32 | #include <Library/DebugLib.h>\r | |
33 | \r | |
1d733f73 LG |
34 | EFI_SMRAM_DESCRIPTOR *mSmramRanges;\r |
35 | UINTN mSmramRangeCount;\r | |
36 | \r | |
37 | /**\r | |
38 | The constructor function caches SMRAM ranges that are present in the system.\r | |
39 | \r | |
40 | It will ASSERT() if SMM Access2 Protocol doesn't exist.\r | |
41 | It will ASSERT() if SMRAM ranges can't be got.\r | |
42 | It will ASSERT() if Resource can't be allocated for cache SMRAM range. \r | |
43 | It will always return EFI_SUCCESS.\r | |
44 | \r | |
45 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
46 | @param SystemTable A pointer to the EFI System Table.\r | |
47 | \r | |
48 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
49 | \r | |
50 | **/\r | |
51 | EFI_STATUS\r | |
52 | EFIAPI\r | |
53 | SmmMemoryAllocationLibConstructor (\r | |
54 | IN EFI_HANDLE ImageHandle,\r | |
55 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
56 | )\r | |
57 | {\r | |
58 | EFI_STATUS Status;\r | |
59 | EFI_SMM_ACCESS2_PROTOCOL *SmmAccess;\r | |
60 | UINTN Size;\r | |
61 | \r | |
62 | //\r | |
63 | // Locate SMM Access2 Protocol\r | |
64 | //\r | |
65 | Status = gBS->LocateProtocol (\r | |
66 | &gEfiSmmAccess2ProtocolGuid, \r | |
67 | NULL, \r | |
68 | (VOID **)&SmmAccess\r | |
69 | );\r | |
70 | ASSERT_EFI_ERROR (Status);\r | |
71 | \r | |
72 | //\r | |
73 | // Get SMRAM range information\r | |
74 | //\r | |
75 | Size = 0;\r | |
76 | Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL);\r | |
77 | ASSERT (Status == EFI_BUFFER_TOO_SMALL);\r | |
78 | \r | |
79 | mSmramRanges = (EFI_SMRAM_DESCRIPTOR *) AllocatePool (Size);\r | |
80 | ASSERT (mSmramRanges != NULL);\r | |
81 | \r | |
82 | Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmramRanges);\r | |
83 | ASSERT_EFI_ERROR (Status);\r | |
84 | \r | |
85 | mSmramRangeCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);\r | |
86 | \r | |
87 | return EFI_SUCCESS;\r | |
88 | }\r | |
89 | \r | |
90 | /**\r | |
91 | If SMM driver exits with an error, it must call this routine \r | |
92 | to free the allocated resource before the exiting.\r | |
93 | \r | |
94 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
95 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
96 | \r | |
97 | @retval EFI_SUCCESS The deconstructor always returns EFI_SUCCESS.\r | |
98 | **/\r | |
99 | EFI_STATUS\r | |
100 | EFIAPI\r | |
101 | SmmMemoryAllocationLibDestructor (\r | |
102 | IN EFI_HANDLE ImageHandle,\r | |
103 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
104 | )\r | |
105 | {\r | |
106 | FreePool (mSmramRanges);\r | |
107 | \r | |
108 | return EFI_SUCCESS;\r | |
109 | }\r | |
110 | \r | |
111 | /**\r | |
112 | Check whether the start address of buffer is within any of the SMRAM ranges.\r | |
113 | \r | |
114 | @param[in] Buffer The pointer to the buffer to be checked.\r | |
115 | \r | |
116 | @retval TURE The buffer is in SMRAM ranges.\r | |
117 | @retval FALSE The buffer is out of SMRAM ranges.\r | |
118 | **/\r | |
119 | BOOLEAN\r | |
120 | EFIAPI\r | |
121 | BufferInSmram (\r | |
122 | IN VOID *Buffer\r | |
123 | )\r | |
124 | {\r | |
125 | UINTN Index;\r | |
126 | \r | |
127 | for (Index = 0; Index < mSmramRangeCount; Index ++) {\r | |
128 | if (((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer >= mSmramRanges[Index].CpuStart) && \r | |
129 | ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer < (mSmramRanges[Index].CpuStart + mSmramRanges[Index].PhysicalSize))) {\r | |
130 | return TRUE;\r | |
131 | }\r | |
132 | }\r | |
133 | \r | |
134 | return FALSE;\r | |
135 | }\r | |
136 | \r | |
c819c016 | 137 | /**\r |
138 | Allocates one or more 4KB pages of a certain memory type.\r | |
139 | \r | |
58380e9c | 140 | Allocates the number of 4KB pages of a certain memory type and returns a pointer \r |
141 | to the allocated buffer. The buffer returned is aligned on a 4KB boundary. If \r | |
142 | Pages is 0, then NULL is returned. If there is not enough memory remaining to \r | |
143 | satisfy the request, then NULL is returned.\r | |
c819c016 | 144 | \r |
145 | @param MemoryType The type of memory to allocate.\r | |
146 | @param Pages The number of 4 KB pages to allocate.\r | |
147 | \r | |
148 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
149 | \r | |
150 | **/\r | |
151 | VOID *\r | |
152 | InternalAllocatePages (\r | |
153 | IN EFI_MEMORY_TYPE MemoryType, \r | |
154 | IN UINTN Pages\r | |
155 | )\r | |
156 | {\r | |
157 | EFI_STATUS Status;\r | |
158 | EFI_PHYSICAL_ADDRESS Memory; \r | |
159 | \r | |
160 | if (Pages == 0) {\r | |
161 | return NULL;\r | |
162 | }\r | |
163 | \r | |
164 | Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r | |
165 | if (EFI_ERROR (Status)) {\r | |
166 | return NULL;\r | |
167 | }\r | |
168 | return (VOID *) (UINTN) Memory;\r | |
169 | }\r | |
170 | \r | |
171 | /**\r | |
172 | Allocates one or more 4KB pages of type EfiBootServicesData.\r | |
173 | \r | |
58380e9c | 174 | Allocates the number of 4KB pages of type EfiBootServicesData and returns a pointer \r |
175 | to the allocated buffer. The buffer returned is aligned on a 4KB boundary. If \r | |
176 | Pages is 0, then NULL is returned. If there is not enough memory remaining to \r | |
177 | satisfy the request, then NULL is returned.\r | |
c819c016 | 178 | \r |
179 | @param Pages The number of 4 KB pages to allocate.\r | |
180 | \r | |
181 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
182 | \r | |
183 | **/\r | |
184 | VOID *\r | |
185 | EFIAPI\r | |
186 | AllocatePages (\r | |
187 | IN UINTN Pages\r | |
188 | )\r | |
189 | {\r | |
190 | return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r | |
191 | }\r | |
192 | \r | |
193 | /**\r | |
194 | Allocates one or more 4KB pages of type EfiRuntimeServicesData.\r | |
195 | \r | |
58380e9c | 196 | Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a \r |
197 | pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary. \r | |
198 | If Pages is 0, then NULL is returned. If there is not enough memory remaining \r | |
199 | to satisfy the request, then NULL is returned.\r | |
c819c016 | 200 | \r |
201 | @param Pages The number of 4 KB pages to allocate.\r | |
202 | \r | |
203 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
204 | \r | |
205 | **/\r | |
206 | VOID *\r | |
207 | EFIAPI\r | |
208 | AllocateRuntimePages (\r | |
209 | IN UINTN Pages\r | |
210 | )\r | |
211 | {\r | |
212 | return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r | |
213 | }\r | |
214 | \r | |
215 | /**\r | |
216 | Allocates one or more 4KB pages of type EfiReservedMemoryType.\r | |
217 | \r | |
58380e9c | 218 | Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a \r |
219 | pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary. \r | |
220 | If Pages is 0, then NULL is returned. If there is not enough memory remaining \r | |
221 | to satisfy the request, then NULL is returned.\r | |
c819c016 | 222 | \r |
223 | @param Pages The number of 4 KB pages to allocate.\r | |
224 | \r | |
225 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
226 | \r | |
227 | **/\r | |
228 | VOID *\r | |
229 | EFIAPI\r | |
230 | AllocateReservedPages (\r | |
231 | IN UINTN Pages\r | |
232 | )\r | |
233 | {\r | |
234 | return NULL;\r | |
235 | }\r | |
236 | \r | |
237 | /**\r | |
238 | Frees one or more 4KB pages that were previously allocated with one of the page allocation\r | |
239 | functions in the Memory Allocation Library.\r | |
240 | \r | |
58380e9c | 241 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. \r |
242 | Buffer must have been allocated on a previous call to the page allocation services \r | |
243 | of the Memory Allocation Library. If it is not possible to free allocated pages, \r | |
244 | then this function will perform no actions.\r | |
c819c016 | 245 | \r |
58380e9c | 246 | If Buffer was not allocated with a page allocation function in the Memory Allocation \r |
247 | Library, then ASSERT().\r | |
c819c016 | 248 | If Pages is zero, then ASSERT().\r |
249 | \r | |
2fc59a00 | 250 | @param Buffer The pointer to the buffer of pages to free.\r |
c819c016 | 251 | @param Pages The number of 4 KB pages to free.\r |
252 | \r | |
253 | **/\r | |
254 | VOID\r | |
255 | EFIAPI\r | |
256 | FreePages (\r | |
257 | IN VOID *Buffer,\r | |
258 | IN UINTN Pages\r | |
259 | )\r | |
260 | {\r | |
261 | EFI_STATUS Status;\r | |
262 | \r | |
263 | ASSERT (Pages != 0);\r | |
1d733f73 LG |
264 | if (BufferInSmram (Buffer)) {\r |
265 | //\r | |
266 | // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePages() service.\r | |
267 | // So, gSmst->SmmFreePages() service is used to free it.\r | |
268 | //\r | |
269 | Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
270 | } else {\r | |
271 | //\r | |
272 | // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePages() service.\r | |
273 | // So, gBS->FreePages() service is used to free it.\r | |
274 | //\r | |
275 | Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
276 | }\r | |
c819c016 | 277 | ASSERT_EFI_ERROR (Status);\r |
278 | }\r | |
279 | \r | |
280 | /**\r | |
281 | Allocates one or more 4KB pages of a certain memory type at a specified alignment.\r | |
282 | \r | |
58380e9c | 283 | Allocates the number of 4KB pages specified by Pages of a certain memory type \r |
284 | with an alignment specified by Alignment. The allocated buffer is returned. \r | |
285 | If Pages is 0, then NULL is returned. If there is not enough memory at the \r | |
286 | specified alignment remaining to satisfy the request, then NULL is returned.\r | |
c819c016 | 287 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
1346352d | 288 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
c819c016 | 289 | \r |
290 | @param MemoryType The type of memory to allocate.\r | |
291 | @param Pages The number of 4 KB pages to allocate.\r | |
58380e9c | 292 | @param Alignment The requested alignment of the allocation. \r |
293 | Must be a power of two.\r | |
c819c016 | 294 | If Alignment is zero, then byte alignment is used.\r |
295 | \r | |
296 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
297 | \r | |
298 | **/\r | |
299 | VOID *\r | |
300 | InternalAllocateAlignedPages (\r | |
301 | IN EFI_MEMORY_TYPE MemoryType, \r | |
302 | IN UINTN Pages,\r | |
303 | IN UINTN Alignment\r | |
304 | )\r | |
305 | {\r | |
306 | EFI_STATUS Status;\r | |
307 | EFI_PHYSICAL_ADDRESS Memory;\r | |
308 | UINTN AlignedMemory;\r | |
309 | UINTN AlignmentMask;\r | |
310 | UINTN UnalignedPages;\r | |
311 | UINTN RealPages;\r | |
312 | \r | |
313 | //\r | |
314 | // Alignment must be a power of two or zero.\r | |
315 | //\r | |
316 | ASSERT ((Alignment & (Alignment - 1)) == 0);\r | |
317 | \r | |
318 | if (Pages == 0) {\r | |
319 | return NULL;\r | |
320 | }\r | |
321 | if (Alignment > EFI_PAGE_SIZE) {\r | |
322 | //\r | |
4f953ed7 | 323 | // Calculate the total number of pages since alignment is larger than page size.\r |
c819c016 | 324 | //\r |
325 | AlignmentMask = Alignment - 1;\r | |
326 | RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);\r | |
327 | //\r | |
328 | // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.\r | |
329 | //\r | |
330 | ASSERT (RealPages > Pages);\r | |
331 | \r | |
332 | Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);\r | |
333 | if (EFI_ERROR (Status)) {\r | |
334 | return NULL;\r | |
335 | }\r | |
336 | AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;\r | |
337 | UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN) Memory);\r | |
338 | if (UnalignedPages > 0) {\r | |
339 | //\r | |
340 | // Free first unaligned page(s).\r | |
341 | //\r | |
342 | Status = gSmst->SmmFreePages (Memory, UnalignedPages);\r | |
343 | ASSERT_EFI_ERROR (Status);\r | |
344 | }\r | |
345 | Memory = (EFI_PHYSICAL_ADDRESS) (AlignedMemory + EFI_PAGES_TO_SIZE (Pages));\r | |
346 | UnalignedPages = RealPages - Pages - UnalignedPages;\r | |
347 | if (UnalignedPages > 0) {\r | |
348 | //\r | |
349 | // Free last unaligned page(s).\r | |
350 | //\r | |
351 | Status = gSmst->SmmFreePages (Memory, UnalignedPages);\r | |
352 | ASSERT_EFI_ERROR (Status);\r | |
353 | }\r | |
354 | } else {\r | |
355 | //\r | |
356 | // Do not over-allocate pages in this case.\r | |
357 | //\r | |
358 | Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r | |
359 | if (EFI_ERROR (Status)) {\r | |
360 | return NULL;\r | |
361 | }\r | |
362 | AlignedMemory = (UINTN) Memory;\r | |
363 | }\r | |
364 | return (VOID *) AlignedMemory;\r | |
365 | }\r | |
366 | \r | |
367 | /**\r | |
368 | Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.\r | |
369 | \r | |
58380e9c | 370 | Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData \r |
371 | with an alignment specified by Alignment. The allocated buffer is returned. \r | |
372 | If Pages is 0, then NULL is returned. If there is not enough memory at the \r | |
373 | specified alignment remaining to satisfy the request, then NULL is returned.\r | |
c819c016 | 374 | \r |
375 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
1346352d | 376 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
c819c016 | 377 | \r |
378 | @param Pages The number of 4 KB pages to allocate.\r | |
58380e9c | 379 | @param Alignment The requested alignment of the allocation. \r |
380 | Must be a power of two.\r | |
c819c016 | 381 | If Alignment is zero, then byte alignment is used.\r |
382 | \r | |
383 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
384 | \r | |
385 | **/\r | |
386 | VOID *\r | |
387 | EFIAPI\r | |
388 | AllocateAlignedPages (\r | |
389 | IN UINTN Pages,\r | |
390 | IN UINTN Alignment\r | |
391 | )\r | |
392 | {\r | |
393 | return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r | |
394 | }\r | |
395 | \r | |
396 | /**\r | |
397 | Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.\r | |
398 | \r | |
58380e9c | 399 | Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData \r |
400 | with an alignment specified by Alignment. The allocated buffer is returned. \r | |
401 | If Pages is 0, then NULL is returned. If there is not enough memory at the \r | |
402 | specified alignment remaining to satisfy the request, then NULL is returned.\r | |
c819c016 | 403 | \r |
404 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
1346352d | 405 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
c819c016 | 406 | \r |
407 | @param Pages The number of 4 KB pages to allocate.\r | |
58380e9c | 408 | @param Alignment The requested alignment of the allocation. \r |
409 | Must be a power of two.\r | |
c819c016 | 410 | If Alignment is zero, then byte alignment is used.\r |
411 | \r | |
412 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
413 | \r | |
414 | **/\r | |
415 | VOID *\r | |
416 | EFIAPI\r | |
417 | AllocateAlignedRuntimePages (\r | |
418 | IN UINTN Pages,\r | |
419 | IN UINTN Alignment\r | |
420 | )\r | |
421 | {\r | |
422 | return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r | |
423 | }\r | |
424 | \r | |
425 | /**\r | |
426 | Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.\r | |
427 | \r | |
58380e9c | 428 | Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType \r |
429 | with an alignment specified by Alignment. The allocated buffer is returned. \r | |
430 | If Pages is 0, then NULL is returned. If there is not enough memory at the \r | |
431 | specified alignment remaining to satisfy the request, then NULL is returned.\r | |
c819c016 | 432 | \r |
433 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
1346352d | 434 | If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().\r |
c819c016 | 435 | \r |
436 | @param Pages The number of 4 KB pages to allocate.\r | |
58380e9c | 437 | @param Alignment The requested alignment of the allocation. \r |
438 | Must be a power of two.\r | |
c819c016 | 439 | If Alignment is zero, then byte alignment is used.\r |
440 | \r | |
441 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
442 | \r | |
443 | **/\r | |
444 | VOID *\r | |
445 | EFIAPI\r | |
446 | AllocateAlignedReservedPages (\r | |
447 | IN UINTN Pages,\r | |
448 | IN UINTN Alignment\r | |
449 | )\r | |
450 | {\r | |
451 | return NULL;\r | |
452 | }\r | |
453 | \r | |
454 | /**\r | |
455 | Frees one or more 4KB pages that were previously allocated with one of the aligned page\r | |
456 | allocation functions in the Memory Allocation Library.\r | |
457 | \r | |
58380e9c | 458 | Frees the number of 4KB pages specified by Pages from the buffer specified by \r |
459 | Buffer. Buffer must have been allocated on a previous call to the aligned page \r | |
460 | allocation services of the Memory Allocation Library. If it is not possible to \r | |
461 | free allocated pages, then this function will perform no actions.\r | |
c819c016 | 462 | \r |
58380e9c | 463 | If Buffer was not allocated with an aligned page allocation function in the \r |
464 | Memory Allocation Library, then ASSERT().\r | |
c819c016 | 465 | If Pages is zero, then ASSERT().\r |
466 | \r | |
2fc59a00 | 467 | @param Buffer The pointer to the buffer of pages to free.\r |
c819c016 | 468 | @param Pages The number of 4 KB pages to free.\r |
469 | \r | |
470 | **/\r | |
471 | VOID\r | |
472 | EFIAPI\r | |
473 | FreeAlignedPages (\r | |
474 | IN VOID *Buffer,\r | |
475 | IN UINTN Pages\r | |
476 | )\r | |
477 | {\r | |
478 | EFI_STATUS Status;\r | |
479 | \r | |
480 | ASSERT (Pages != 0);\r | |
1d733f73 LG |
481 | if (BufferInSmram (Buffer)) {\r |
482 | //\r | |
483 | // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePages() service.\r | |
484 | // So, gSmst->SmmFreePages() service is used to free it.\r | |
485 | //\r | |
486 | Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
487 | } else {\r | |
488 | //\r | |
489 | // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePages() service.\r | |
490 | // So, gBS->FreePages() service is used to free it.\r | |
491 | //\r | |
492 | Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
493 | }\r | |
c819c016 | 494 | ASSERT_EFI_ERROR (Status);\r |
495 | }\r | |
496 | \r | |
497 | /**\r | |
498 | Allocates a buffer of a certain pool type.\r | |
499 | \r | |
58380e9c | 500 | Allocates the number bytes specified by AllocationSize of a certain pool type \r |
501 | and returns a pointer to the allocated buffer. If AllocationSize is 0, then a \r | |
502 | valid buffer of 0 size is returned. If there is not enough memory remaining to \r | |
503 | satisfy the request, then NULL is returned.\r | |
c819c016 | 504 | \r |
505 | @param MemoryType The type of memory to allocate.\r | |
506 | @param AllocationSize The number of bytes to allocate.\r | |
507 | \r | |
508 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
509 | \r | |
510 | **/\r | |
511 | VOID *\r | |
512 | InternalAllocatePool (\r | |
513 | IN EFI_MEMORY_TYPE MemoryType, \r | |
514 | IN UINTN AllocationSize\r | |
515 | )\r | |
516 | {\r | |
517 | EFI_STATUS Status;\r | |
518 | VOID *Memory;\r | |
519 | \r | |
520 | Status = gSmst->SmmAllocatePool (MemoryType, AllocationSize, &Memory);\r | |
521 | if (EFI_ERROR (Status)) {\r | |
522 | Memory = NULL;\r | |
523 | }\r | |
524 | return Memory;\r | |
525 | }\r | |
526 | \r | |
527 | /**\r | |
528 | Allocates a buffer of type EfiBootServicesData.\r | |
529 | \r | |
58380e9c | 530 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData \r |
531 | and returns a pointer to the allocated buffer. If AllocationSize is 0, then a \r | |
532 | valid buffer of 0 size is returned. If there is not enough memory remaining to \r | |
533 | satisfy the request, then NULL is returned.\r | |
c819c016 | 534 | \r |
535 | @param AllocationSize The number of bytes to allocate.\r | |
536 | \r | |
537 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
538 | \r | |
539 | **/\r | |
540 | VOID *\r | |
541 | EFIAPI\r | |
542 | AllocatePool (\r | |
543 | IN UINTN AllocationSize\r | |
544 | )\r | |
545 | {\r | |
546 | return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r | |
547 | }\r | |
548 | \r | |
549 | /**\r | |
550 | Allocates a buffer of type EfiRuntimeServicesData.\r | |
551 | \r | |
58380e9c | 552 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData \r |
553 | and returns a pointer to the allocated buffer. If AllocationSize is 0, then a \r | |
554 | valid buffer of 0 size is returned. If there is not enough memory remaining to \r | |
555 | satisfy the request, then NULL is returned.\r | |
c819c016 | 556 | \r |
557 | @param AllocationSize The number of bytes to allocate.\r | |
558 | \r | |
559 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
560 | \r | |
561 | **/\r | |
562 | VOID *\r | |
563 | EFIAPI\r | |
564 | AllocateRuntimePool (\r | |
565 | IN UINTN AllocationSize\r | |
566 | )\r | |
567 | {\r | |
568 | return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r | |
569 | }\r | |
570 | \r | |
571 | /**\r | |
572 | Allocates a buffer of type EfiReservedMemoryType.\r | |
573 | \r | |
58380e9c | 574 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType \r |
575 | and returns a pointer to the allocated buffer. If AllocationSize is 0, then a \r | |
576 | valid buffer of 0 size is returned. If there is not enough memory remaining to \r | |
577 | satisfy the request, then NULL is returned.\r | |
c819c016 | 578 | \r |
579 | @param AllocationSize The number of bytes to allocate.\r | |
580 | \r | |
581 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
582 | \r | |
583 | **/\r | |
584 | VOID *\r | |
585 | EFIAPI\r | |
586 | AllocateReservedPool (\r | |
587 | IN UINTN AllocationSize\r | |
588 | )\r | |
589 | {\r | |
590 | return NULL;\r | |
591 | }\r | |
592 | \r | |
593 | /**\r | |
594 | Allocates and zeros a buffer of a certain pool type.\r | |
595 | \r | |
58380e9c | 596 | Allocates the number bytes specified by AllocationSize of a certain pool type, \r |
597 | clears the buffer with zeros, and returns a pointer to the allocated buffer. \r | |
598 | If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is \r | |
599 | not enough memory remaining to satisfy the request, then NULL is returned.\r | |
c819c016 | 600 | \r |
601 | @param PoolType The type of memory to allocate.\r | |
602 | @param AllocationSize The number of bytes to allocate and zero.\r | |
603 | \r | |
604 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
605 | \r | |
606 | **/\r | |
607 | VOID *\r | |
608 | InternalAllocateZeroPool (\r | |
609 | IN EFI_MEMORY_TYPE PoolType, \r | |
610 | IN UINTN AllocationSize\r | |
611 | ) \r | |
612 | {\r | |
613 | VOID *Memory;\r | |
614 | \r | |
615 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r | |
616 | if (Memory != NULL) {\r | |
617 | Memory = ZeroMem (Memory, AllocationSize);\r | |
618 | }\r | |
619 | return Memory;\r | |
620 | }\r | |
621 | \r | |
622 | /**\r | |
623 | Allocates and zeros a buffer of type EfiBootServicesData.\r | |
624 | \r | |
58380e9c | 625 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, \r |
626 | clears the buffer with zeros, and returns a pointer to the allocated buffer. \r | |
627 | If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is \r | |
628 | not enough memory remaining to satisfy the request, then NULL is returned.\r | |
c819c016 | 629 | \r |
630 | @param AllocationSize The number of bytes to allocate and zero.\r | |
631 | \r | |
632 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
633 | \r | |
634 | **/\r | |
635 | VOID *\r | |
636 | EFIAPI\r | |
637 | AllocateZeroPool (\r | |
638 | IN UINTN AllocationSize\r | |
639 | )\r | |
640 | {\r | |
641 | return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r | |
642 | }\r | |
643 | \r | |
644 | /**\r | |
645 | Allocates and zeros a buffer of type EfiRuntimeServicesData.\r | |
646 | \r | |
58380e9c | 647 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, \r |
648 | clears the buffer with zeros, and returns a pointer to the allocated buffer. \r | |
649 | If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is \r | |
650 | not enough memory remaining to satisfy the request, then NULL is returned.\r | |
c819c016 | 651 | \r |
652 | @param AllocationSize The number of bytes to allocate and zero.\r | |
653 | \r | |
654 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
655 | \r | |
656 | **/\r | |
657 | VOID *\r | |
658 | EFIAPI\r | |
659 | AllocateRuntimeZeroPool (\r | |
660 | IN UINTN AllocationSize\r | |
661 | )\r | |
662 | {\r | |
663 | return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r | |
664 | }\r | |
665 | \r | |
666 | /**\r | |
667 | Allocates and zeros a buffer of type EfiReservedMemoryType.\r | |
668 | \r | |
58380e9c | 669 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, \r |
670 | clears the buffer with zeros, and returns a pointer to the allocated buffer. \r | |
671 | If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is \r | |
672 | not enough memory remaining to satisfy the request, then NULL is returned.\r | |
c819c016 | 673 | \r |
674 | @param AllocationSize The number of bytes to allocate and zero.\r | |
675 | \r | |
676 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
677 | \r | |
678 | **/\r | |
679 | VOID *\r | |
680 | EFIAPI\r | |
681 | AllocateReservedZeroPool (\r | |
682 | IN UINTN AllocationSize\r | |
683 | )\r | |
684 | {\r | |
685 | return NULL;\r | |
686 | }\r | |
687 | \r | |
688 | /**\r | |
689 | Copies a buffer to an allocated buffer of a certain pool type.\r | |
690 | \r | |
58380e9c | 691 | Allocates the number bytes specified by AllocationSize of a certain pool type, \r |
692 | copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns \r | |
693 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer \r | |
694 | of 0 size is returned. If there is not enough memory remaining to satisfy the \r | |
695 | request, then NULL is returned. If Buffer is NULL, then ASSERT().\r | |
c819c016 | 696 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
697 | \r | |
698 | @param PoolType The type of pool to allocate.\r | |
699 | @param AllocationSize The number of bytes to allocate and zero.\r | |
700 | @param Buffer The buffer to copy to the allocated buffer.\r | |
701 | \r | |
702 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
703 | \r | |
704 | **/\r | |
705 | VOID *\r | |
706 | InternalAllocateCopyPool (\r | |
707 | IN EFI_MEMORY_TYPE PoolType, \r | |
708 | IN UINTN AllocationSize,\r | |
709 | IN CONST VOID *Buffer\r | |
710 | ) \r | |
711 | {\r | |
712 | VOID *Memory;\r | |
713 | \r | |
714 | ASSERT (Buffer != NULL);\r | |
715 | ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));\r | |
716 | \r | |
717 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r | |
718 | if (Memory != NULL) {\r | |
719 | Memory = CopyMem (Memory, Buffer, AllocationSize);\r | |
720 | }\r | |
721 | return Memory;\r | |
722 | } \r | |
723 | \r | |
724 | /**\r | |
725 | Copies a buffer to an allocated buffer of type EfiBootServicesData.\r | |
726 | \r | |
58380e9c | 727 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, \r |
728 | copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns \r | |
729 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer \r | |
730 | of 0 size is returned. If there is not enough memory remaining to satisfy the \r | |
731 | request, then NULL is returned.\r | |
c819c016 | 732 | \r |
733 | If Buffer is NULL, then ASSERT().\r | |
734 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r | |
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 | AllocateCopyPool (\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 EfiRuntimeServicesData.\r | |
754 | \r | |
58380e9c | 755 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, \r |
756 | copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns \r | |
757 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer \r | |
758 | of 0 size is returned. If there is not enough memory remaining to satisfy the \r | |
759 | request, then NULL is returned.\r | |
c819c016 | 760 | \r |
761 | If Buffer is NULL, then ASSERT().\r | |
762 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r | |
763 | \r | |
764 | @param AllocationSize The number of bytes to allocate and zero.\r | |
765 | @param Buffer The buffer to copy to the allocated buffer.\r | |
766 | \r | |
767 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
768 | \r | |
769 | **/\r | |
770 | VOID *\r | |
771 | EFIAPI\r | |
772 | AllocateRuntimeCopyPool (\r | |
773 | IN UINTN AllocationSize,\r | |
774 | IN CONST VOID *Buffer\r | |
775 | )\r | |
776 | {\r | |
777 | return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);\r | |
778 | }\r | |
779 | \r | |
780 | /**\r | |
781 | Copies a buffer to an allocated buffer of type EfiReservedMemoryType.\r | |
782 | \r | |
58380e9c | 783 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, \r |
784 | copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns \r | |
785 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer \r | |
786 | of 0 size is returned. If there is not enough memory remaining to satisfy the \r | |
787 | request, then NULL is returned.\r | |
c819c016 | 788 | \r |
789 | If Buffer is NULL, then ASSERT().\r | |
790 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r | |
791 | \r | |
792 | @param AllocationSize The number of bytes to allocate and zero.\r | |
793 | @param Buffer The buffer to copy to the allocated buffer.\r | |
794 | \r | |
795 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
796 | \r | |
797 | **/\r | |
798 | VOID *\r | |
799 | EFIAPI\r | |
800 | AllocateReservedCopyPool (\r | |
801 | IN UINTN AllocationSize,\r | |
802 | IN CONST VOID *Buffer\r | |
803 | )\r | |
804 | {\r | |
805 | return NULL;\r | |
806 | }\r | |
807 | \r | |
808 | /**\r | |
809 | Reallocates a buffer of a specified memory type.\r | |
810 | \r | |
811 | Allocates and zeros the number bytes specified by NewSize from memory of the type\r | |
812 | specified by PoolType. If OldBuffer is not NULL, then the smaller of OldSize and \r | |
813 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r | |
814 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r | |
815 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r | |
816 | enough memory remaining to satisfy the request, then NULL is returned.\r | |
817 | \r | |
58380e9c | 818 | If the allocation of the new buffer is successful and the smaller of NewSize \r |
819 | and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r | |
c819c016 | 820 | \r |
821 | @param PoolType The type of pool to allocate.\r | |
822 | @param OldSize The size, in bytes, of OldBuffer.\r | |
823 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
58380e9c | 824 | @param OldBuffer The buffer to copy to the allocated buffer. This is an \r |
825 | optional parameter that may be NULL.\r | |
c819c016 | 826 | \r |
827 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
828 | \r | |
829 | **/\r | |
830 | VOID *\r | |
831 | InternalReallocatePool (\r | |
832 | IN EFI_MEMORY_TYPE PoolType, \r | |
833 | IN UINTN OldSize,\r | |
834 | IN UINTN NewSize,\r | |
835 | IN VOID *OldBuffer OPTIONAL\r | |
836 | )\r | |
837 | {\r | |
838 | VOID *NewBuffer;\r | |
839 | \r | |
840 | NewBuffer = InternalAllocateZeroPool (PoolType, NewSize);\r | |
841 | if (NewBuffer != NULL && OldBuffer != NULL) {\r | |
842 | CopyMem (NewBuffer, OldBuffer, MIN (OldSize, NewSize));\r | |
843 | FreePool (OldBuffer);\r | |
844 | }\r | |
845 | return NewBuffer;\r | |
846 | }\r | |
847 | \r | |
848 | /**\r | |
849 | Reallocates a buffer of type EfiBootServicesData.\r | |
850 | \r | |
851 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
852 | EfiBootServicesData. If OldBuffer is not NULL, then the smaller of OldSize and \r | |
853 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r | |
854 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r | |
855 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r | |
856 | enough memory remaining to satisfy the request, then NULL is returned.\r | |
857 | \r | |
58380e9c | 858 | If the allocation of the new buffer is successful and the smaller of NewSize \r |
859 | and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r | |
c819c016 | 860 | \r |
861 | @param OldSize The size, in bytes, of OldBuffer.\r | |
862 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
58380e9c | 863 | @param OldBuffer The buffer to copy to the allocated buffer. This is an \r |
864 | optional parameter that may be NULL.\r | |
c819c016 | 865 | \r |
866 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
867 | \r | |
868 | **/\r | |
869 | VOID *\r | |
870 | EFIAPI\r | |
871 | ReallocatePool (\r | |
872 | IN UINTN OldSize,\r | |
873 | IN UINTN NewSize,\r | |
874 | IN VOID *OldBuffer OPTIONAL\r | |
875 | )\r | |
876 | {\r | |
877 | return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);\r | |
878 | }\r | |
879 | \r | |
880 | /**\r | |
881 | Reallocates a buffer of type EfiRuntimeServicesData.\r | |
882 | \r | |
883 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
58380e9c | 884 | EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize \r |
885 | and NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r | |
c819c016 | 886 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r |
887 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r | |
888 | enough memory remaining to satisfy the request, then NULL is returned.\r | |
889 | \r | |
58380e9c | 890 | If the allocation of the new buffer is successful and the smaller of NewSize \r |
891 | and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r | |
c819c016 | 892 | \r |
893 | @param OldSize The size, in bytes, of OldBuffer.\r | |
894 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
58380e9c | 895 | @param OldBuffer The buffer to copy to the allocated buffer. This is an \r |
896 | optional parameter that may be NULL.\r | |
c819c016 | 897 | \r |
898 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
899 | \r | |
900 | **/\r | |
901 | VOID *\r | |
902 | EFIAPI\r | |
903 | ReallocateRuntimePool (\r | |
904 | IN UINTN OldSize,\r | |
905 | IN UINTN NewSize,\r | |
906 | IN VOID *OldBuffer OPTIONAL\r | |
907 | )\r | |
908 | {\r | |
909 | return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);\r | |
910 | }\r | |
911 | \r | |
912 | /**\r | |
913 | Reallocates a buffer of type EfiReservedMemoryType.\r | |
914 | \r | |
915 | Allocates and zeros the number bytes specified by NewSize from memory of type\r | |
58380e9c | 916 | EfiReservedMemoryType. If OldBuffer is not NULL, then the smaller of OldSize \r |
917 | and NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r | |
c819c016 | 918 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r |
919 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r | |
920 | enough memory remaining to satisfy the request, then NULL is returned.\r | |
921 | \r | |
58380e9c | 922 | If the allocation of the new buffer is successful and the smaller of NewSize \r |
923 | and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r | |
c819c016 | 924 | \r |
925 | @param OldSize The size, in bytes, of OldBuffer.\r | |
926 | @param NewSize The size, in bytes, of the buffer to reallocate.\r | |
58380e9c | 927 | @param OldBuffer The buffer to copy to the allocated buffer. This is an \r |
928 | optional parameter that may be NULL.\r | |
c819c016 | 929 | \r |
930 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
931 | \r | |
932 | **/\r | |
933 | VOID *\r | |
934 | EFIAPI\r | |
935 | ReallocateReservedPool (\r | |
936 | IN UINTN OldSize,\r | |
937 | IN UINTN NewSize,\r | |
938 | IN VOID *OldBuffer OPTIONAL\r | |
939 | )\r | |
940 | {\r | |
941 | return NULL;\r | |
942 | }\r | |
943 | \r | |
944 | /**\r | |
58380e9c | 945 | Frees a buffer that was previously allocated with one of the pool allocation \r |
946 | functions in the Memory Allocation Library.\r | |
c819c016 | 947 | \r |
58380e9c | 948 | Frees the buffer specified by Buffer. Buffer must have been allocated on a \r |
949 | previous call to the pool allocation services of the Memory Allocation Library. \r | |
950 | If it is not possible to free pool resources, then this function will perform \r | |
951 | no actions.\r | |
c819c016 | 952 | \r |
58380e9c | 953 | If Buffer was not allocated with a pool allocation function in the Memory \r |
954 | Allocation Library, then ASSERT().\r | |
c819c016 | 955 | \r |
2fc59a00 | 956 | @param Buffer The pointer to the buffer to free.\r |
c819c016 | 957 | \r |
958 | **/\r | |
959 | VOID\r | |
960 | EFIAPI\r | |
961 | FreePool (\r | |
962 | IN VOID *Buffer\r | |
963 | )\r | |
964 | {\r | |
965 | EFI_STATUS Status;\r | |
966 | \r | |
1d733f73 LG |
967 | if (BufferInSmram (Buffer)) {\r |
968 | //\r | |
969 | // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePool() service.\r | |
970 | // So, gSmst->SmmFreePool() service is used to free it.\r | |
971 | //\r | |
972 | Status = gSmst->SmmFreePool (Buffer);\r | |
973 | } else {\r | |
974 | //\r | |
975 | // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePool() service.\r | |
976 | // So, gBS->FreePool() service is used to free it.\r | |
977 | //\r | |
978 | Status = gBS->FreePool (Buffer);\r | |
979 | }\r | |
c819c016 | 980 | ASSERT_EFI_ERROR (Status);\r |
981 | }\r |