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