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878ddf1f | 1 | /** @file\r |
2 | Support routines for memory allocation routines for use with drivers.\r | |
3 | \r | |
4 | Copyright (c) 2006, Intel Corporation<BR>\r | |
5 | All rights reserved. This program and the accompanying materials \r | |
6 | are licensed and made available under the terms and conditions of the BSD License \r | |
7 | which accompanies this distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
12 | \r | |
13 | Module Name: MemoryAllocationLib.c\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | \r | |
878ddf1f | 18 | /**\r |
1f33a17f | 19 | Allocates one or more 4KB pages of a certain memory type.\r |
878ddf1f | 20 | \r |
1f33a17f | 21 | Allocates the number of 4KB pages of a certain memory type and returns a pointer to the allocated\r |
22 | buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL is returned.\r | |
878ddf1f | 23 | If there is not enough memory remaining to satisfy the request, then NULL is returned.\r |
24 | \r | |
1f33a17f | 25 | @param MemoryType The type of memory to allocate.\r |
26 | @param Pages The number of 4 KB pages to allocate.\r | |
27 | \r | |
28 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
29 | \r | |
878ddf1f | 30 | **/\r |
31 | VOID *\r | |
32 | InternalAllocatePages (\r | |
33 | IN EFI_MEMORY_TYPE MemoryType, \r | |
34 | IN UINTN Pages\r | |
35 | )\r | |
36 | {\r | |
37 | EFI_STATUS Status;\r | |
38 | EFI_PHYSICAL_ADDRESS Memory; \r | |
39 | \r | |
40 | if (Pages == 0) {\r | |
41 | return NULL;\r | |
42 | }\r | |
43 | \r | |
44 | Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r | |
45 | if (EFI_ERROR (Status)) {\r | |
46 | Memory = 0;\r | |
47 | }\r | |
48 | return (VOID *) (UINTN) Memory;\r | |
49 | }\r | |
50 | \r | |
51 | /**\r | |
1f33a17f | 52 | Allocates one or more 4KB pages of type EfiBootServicesData.\r |
878ddf1f | 53 | \r |
1f33a17f | 54 | Allocates the number of 4KB pages of type EfiBootServicesData and returns a pointer to the\r |
55 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
56 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
57 | returned.\r | |
878ddf1f | 58 | \r |
1f33a17f | 59 | @param Pages The number of 4 KB pages to allocate.\r |
60 | \r | |
61 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 62 | \r |
63 | **/\r | |
64 | VOID *\r | |
65 | EFIAPI\r | |
66 | AllocatePages (\r | |
67 | IN UINTN Pages\r | |
68 | )\r | |
69 | {\r | |
70 | return InternalAllocatePages (EfiBootServicesData, Pages);\r | |
71 | }\r | |
72 | \r | |
73 | /**\r | |
1f33a17f | 74 | Allocates one or more 4KB pages of type EfiRuntimeServicesData.\r |
878ddf1f | 75 | \r |
1f33a17f | 76 | Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the\r |
77 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
78 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
79 | returned.\r | |
878ddf1f | 80 | \r |
1f33a17f | 81 | @param Pages The number of 4 KB pages to allocate.\r |
82 | \r | |
83 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 84 | \r |
85 | **/\r | |
86 | VOID *\r | |
87 | EFIAPI\r | |
88 | AllocateRuntimePages (\r | |
89 | IN UINTN Pages\r | |
90 | )\r | |
91 | {\r | |
92 | return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r | |
93 | }\r | |
94 | \r | |
95 | /**\r | |
1f33a17f | 96 | Allocates one or more 4KB pages of type EfiReservedMemoryType.\r |
878ddf1f | 97 | \r |
1f33a17f | 98 | Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a pointer to the\r |
99 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
100 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
101 | returned.\r | |
878ddf1f | 102 | \r |
1f33a17f | 103 | @param Pages The number of 4 KB pages to allocate.\r |
104 | \r | |
105 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 106 | \r |
107 | **/\r | |
108 | VOID *\r | |
109 | EFIAPI\r | |
110 | AllocateReservedPages (\r | |
111 | IN UINTN Pages\r | |
112 | )\r | |
113 | {\r | |
114 | return InternalAllocatePages (EfiReservedMemoryType, Pages);\r | |
115 | }\r | |
116 | \r | |
117 | /**\r | |
1f33a17f | 118 | Frees one or more 4KB pages that were previously allocated with one of the page allocation\r |
119 | functions in the Memory Allocation Library.\r | |
120 | \r | |
121 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r | |
122 | must have been allocated on a previous call to the page allocation services of the Memory\r | |
123 | Allocation Library.\r | |
124 | If Buffer was not allocated with a page allocation function in the Memory Allocation Library,\r | |
125 | then ASSERT().\r | |
126 | If Pages is zero, then ASSERT().\r | |
127 | \r | |
128 | @param Buffer Pointer to the buffer of pages to free.\r | |
129 | @param Pages The number of 4 KB pages to free.\r | |
878ddf1f | 130 | \r |
131 | **/\r | |
132 | VOID\r | |
133 | EFIAPI\r | |
134 | FreePages (\r | |
135 | IN VOID *Buffer,\r | |
136 | IN UINTN Pages\r | |
137 | )\r | |
138 | {\r | |
139 | EFI_STATUS Status;\r | |
140 | \r | |
141 | ASSERT (Pages != 0);\r | |
142 | Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
143 | ASSERT_EFI_ERROR (Status);\r | |
144 | }\r | |
145 | \r | |
146 | /**\r | |
1f33a17f | 147 | Allocates one or more 4KB pages of a certain memory type at a specified alignment.\r |
878ddf1f | 148 | \r |
1f33a17f | 149 | Allocates the number of 4KB pages specified by Pages of a certain memory type with an alignment\r |
150 | specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is returned.\r | |
151 | If there is not enough memory at the specified alignment remaining to satisfy the request, then\r | |
152 | NULL is returned.\r | |
153 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
878ddf1f | 154 | \r |
1f33a17f | 155 | @param MemoryType The type of memory to allocate.\r |
156 | @param Pages The number of 4 KB pages to allocate.\r | |
157 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r | |
158 | If Alignment is zero, then byte alignment is used.\r | |
159 | \r | |
160 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 161 | \r |
162 | **/\r | |
163 | VOID *\r | |
164 | InternalAllocateAlignedPages (\r | |
165 | IN EFI_MEMORY_TYPE MemoryType, \r | |
166 | IN UINTN Pages,\r | |
167 | IN UINTN Alignment\r | |
168 | )\r | |
169 | {\r | |
170 | EFI_STATUS Status;\r | |
171 | EFI_PHYSICAL_ADDRESS Memory;\r | |
172 | UINTN AlignedMemory;\r | |
173 | UINTN AlignmentMask;\r | |
174 | UINTN UnalignedPages;\r | |
175 | UINTN RealPages;\r | |
176 | \r | |
177 | //\r | |
178 | // Alignment must be a power of two or zero.\r | |
179 | //\r | |
180 | ASSERT ((Alignment & (Alignment - 1)) == 0);\r | |
181 | \r | |
182 | if (Pages == 0) {\r | |
183 | return NULL;\r | |
184 | }\r | |
185 | if (Alignment > EFI_PAGE_SIZE) {\r | |
186 | //\r | |
187 | // Caculate the total number of pages since alignment is larger than page size.\r | |
188 | //\r | |
189 | AlignmentMask = Alignment - 1;\r | |
190 | RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);\r | |
a3657e3e | 191 | //\r |
192 | // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.\r | |
193 | //\r | |
194 | ASSERT (RealPages > Pages);\r | |
195 | \r | |
878ddf1f | 196 | Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);\r |
197 | if (EFI_ERROR (Status)) {\r | |
198 | return NULL;\r | |
199 | }\r | |
200 | AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;\r | |
201 | UnalignedPages = EFI_SIZE_TO_PAGES ((UINTN) Memory - AlignedMemory);\r | |
202 | if (UnalignedPages > 0) {\r | |
203 | //\r | |
204 | // Free first unaligned page(s).\r | |
205 | //\r | |
206 | Status = gBS->FreePages (Memory, UnalignedPages);\r | |
207 | ASSERT_EFI_ERROR (Status);\r | |
208 | }\r | |
209 | Memory = (EFI_PHYSICAL_ADDRESS) (AlignedMemory + EFI_PAGES_TO_SIZE (Pages));\r | |
210 | UnalignedPages = RealPages - Pages - UnalignedPages;\r | |
211 | if (UnalignedPages > 0) {\r | |
212 | //\r | |
213 | // Free last unaligned page(s).\r | |
214 | //\r | |
215 | Status = gBS->FreePages (Memory, UnalignedPages);\r | |
216 | ASSERT_EFI_ERROR (Status);\r | |
217 | }\r | |
218 | } else {\r | |
219 | //\r | |
220 | // Do not over-allocate pages in this case.\r | |
221 | //\r | |
222 | Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r | |
223 | if (EFI_ERROR (Status)) {\r | |
224 | return NULL;\r | |
225 | }\r | |
226 | AlignedMemory = (UINTN) Memory;\r | |
227 | }\r | |
228 | return (VOID *) AlignedMemory;\r | |
229 | }\r | |
230 | \r | |
231 | /**\r | |
1f33a17f | 232 | Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.\r |
233 | \r | |
234 | Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an\r | |
235 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
236 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
237 | request, then NULL is returned.\r | |
238 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
878ddf1f | 239 | \r |
1f33a17f | 240 | @param Pages The number of 4 KB pages to allocate.\r |
241 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r | |
242 | If Alignment is zero, then byte alignment is used.\r | |
878ddf1f | 243 | \r |
1f33a17f | 244 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
878ddf1f | 245 | \r |
246 | **/\r | |
247 | VOID *\r | |
248 | EFIAPI\r | |
249 | AllocateAlignedPages (\r | |
250 | IN UINTN Pages,\r | |
251 | IN UINTN Alignment\r | |
252 | )\r | |
253 | {\r | |
254 | return InternalAllocateAlignedPages (EfiBootServicesData, Pages, Alignment);\r | |
255 | }\r | |
256 | \r | |
257 | /**\r | |
1f33a17f | 258 | Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.\r |
878ddf1f | 259 | \r |
1f33a17f | 260 | Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData with an\r |
261 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
262 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
263 | request, then NULL is returned.\r | |
264 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
878ddf1f | 265 | \r |
1f33a17f | 266 | @param Pages The number of 4 KB pages to allocate.\r |
267 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r | |
268 | If Alignment is zero, then byte alignment is used.\r | |
269 | \r | |
270 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 271 | \r |
272 | **/\r | |
273 | VOID *\r | |
274 | EFIAPI\r | |
275 | AllocateAlignedRuntimePages (\r | |
276 | IN UINTN Pages,\r | |
277 | IN UINTN Alignment\r | |
278 | )\r | |
279 | {\r | |
280 | return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r | |
281 | }\r | |
282 | \r | |
283 | /**\r | |
284 | Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.\r | |
285 | \r | |
1f33a17f | 286 | Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType with an\r |
287 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
288 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
289 | request, then NULL is returned.\r | |
290 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
291 | \r | |
292 | @param Pages The number of 4 KB pages to allocate.\r | |
293 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r | |
294 | If Alignment is zero, then byte alignment is used.\r | |
878ddf1f | 295 | \r |
1f33a17f | 296 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
878ddf1f | 297 | \r |
298 | **/\r | |
299 | VOID *\r | |
300 | EFIAPI\r | |
301 | AllocateAlignedReservedPages (\r | |
302 | IN UINTN Pages,\r | |
303 | IN UINTN Alignment\r | |
304 | )\r | |
305 | {\r | |
306 | return InternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment);\r | |
307 | }\r | |
308 | \r | |
309 | /**\r | |
1f33a17f | 310 | Frees one or more 4KB pages that were previously allocated with one of the aligned page\r |
311 | allocation functions in the Memory Allocation Library.\r | |
312 | \r | |
313 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r | |
314 | must have been allocated on a previous call to the aligned page allocation services of the Memory\r | |
315 | Allocation Library.\r | |
316 | If Buffer was not allocated with an aligned page allocation function in the Memory Allocation\r | |
317 | Library, then ASSERT().\r | |
318 | If Pages is zero, then ASSERT().\r | |
319 | \r | |
320 | @param Buffer Pointer to the buffer of pages to free.\r | |
321 | @param Pages The number of 4 KB pages to free.\r | |
878ddf1f | 322 | \r |
323 | **/\r | |
324 | VOID\r | |
325 | EFIAPI\r | |
326 | FreeAlignedPages (\r | |
327 | IN VOID *Buffer,\r | |
328 | IN UINTN Pages\r | |
329 | )\r | |
330 | {\r | |
331 | EFI_STATUS Status;\r | |
332 | \r | |
333 | ASSERT (Pages != 0);\r | |
334 | Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r | |
335 | ASSERT_EFI_ERROR (Status);\r | |
336 | }\r | |
337 | \r | |
338 | /**\r | |
1f33a17f | 339 | Allocates a buffer of a certain pool type.\r |
878ddf1f | 340 | \r |
1f33a17f | 341 | Allocates the number bytes specified by AllocationSize of a certain pool type and returns a\r |
342 | pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
343 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
878ddf1f | 344 | \r |
1f33a17f | 345 | @param MemoryType The type of memory to allocate.\r |
346 | @param AllocationSize The number of bytes to allocate.\r | |
347 | \r | |
348 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 349 | \r |
350 | **/\r | |
351 | VOID *\r | |
352 | InternalAllocatePool (\r | |
353 | IN EFI_MEMORY_TYPE MemoryType, \r | |
354 | IN UINTN AllocationSize\r | |
355 | )\r | |
356 | {\r | |
357 | EFI_STATUS Status;\r | |
358 | VOID *Memory;\r | |
359 | \r | |
360 | Status = gBS->AllocatePool (MemoryType, AllocationSize, &Memory);\r | |
361 | if (EFI_ERROR (Status)) {\r | |
362 | Memory = NULL;\r | |
363 | }\r | |
364 | return Memory;\r | |
365 | }\r | |
366 | \r | |
367 | /**\r | |
368 | Allocates a buffer of type EfiBootServicesData.\r | |
369 | \r | |
1f33a17f | 370 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a\r |
371 | pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
372 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
878ddf1f | 373 | \r |
1f33a17f | 374 | @param AllocationSize The number of bytes to allocate.\r |
375 | \r | |
376 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 377 | \r |
378 | **/\r | |
379 | VOID *\r | |
380 | EFIAPI\r | |
381 | AllocatePool (\r | |
382 | IN UINTN AllocationSize\r | |
383 | )\r | |
384 | {\r | |
385 | return InternalAllocatePool (EfiBootServicesData, AllocationSize);\r | |
386 | }\r | |
387 | \r | |
388 | /**\r | |
389 | Allocates a buffer of type EfiRuntimeServicesData.\r | |
390 | \r | |
1f33a17f | 391 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData and returns\r |
392 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
393 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
878ddf1f | 394 | \r |
1f33a17f | 395 | @param AllocationSize The number of bytes to allocate.\r |
396 | \r | |
397 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 398 | \r |
399 | **/\r | |
400 | VOID *\r | |
401 | EFIAPI\r | |
402 | AllocateRuntimePool (\r | |
403 | IN UINTN AllocationSize\r | |
404 | )\r | |
405 | {\r | |
406 | return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r | |
407 | }\r | |
408 | \r | |
409 | /**\r | |
1f33a17f | 410 | Allocates a buffer of type EfieservedMemoryType.\r |
878ddf1f | 411 | \r |
1f33a17f | 412 | Allocates the number bytes specified by AllocationSize of type EfieservedMemoryType and returns\r |
413 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
414 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
878ddf1f | 415 | \r |
1f33a17f | 416 | @param AllocationSize The number of bytes to allocate.\r |
417 | \r | |
418 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 419 | \r |
420 | **/\r | |
421 | VOID *\r | |
422 | EFIAPI\r | |
423 | AllocateReservedPool (\r | |
424 | IN UINTN AllocationSize\r | |
425 | )\r | |
426 | {\r | |
427 | return InternalAllocatePool (EfiReservedMemoryType, AllocationSize);\r | |
428 | }\r | |
429 | \r | |
430 | /**\r | |
431 | Allocates and zeros a buffer of a certian pool type.\r | |
432 | \r | |
1f33a17f | 433 | Allocates the number bytes specified by AllocationSize of a certian pool type, clears the buffer\r |
434 | with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a valid\r | |
435 | buffer of 0 size is returned. If there is not enough memory remaining to satisfy the request,\r | |
436 | then NULL is returned.\r | |
878ddf1f | 437 | \r |
1f33a17f | 438 | @param PoolType The type of memory to allocate.\r |
439 | @param AllocationSize The number of bytes to allocate and zero.\r | |
440 | \r | |
441 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 442 | \r |
443 | **/\r | |
444 | VOID *\r | |
445 | InternalAllocateZeroPool (\r | |
446 | IN EFI_MEMORY_TYPE PoolType, \r | |
447 | IN UINTN AllocationSize\r | |
448 | ) \r | |
449 | {\r | |
450 | VOID *Memory;\r | |
1f33a17f | 451 | \r |
878ddf1f | 452 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r |
453 | if (Memory != NULL) {\r | |
454 | Memory = ZeroMem (Memory, AllocationSize);\r | |
455 | }\r | |
456 | return Memory;\r | |
457 | }\r | |
458 | \r | |
459 | /**\r | |
460 | Allocates and zeros a buffer of type EfiBootServicesData.\r | |
461 | \r | |
1f33a17f | 462 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the\r |
463 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
464 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
465 | request, then NULL is returned.\r | |
878ddf1f | 466 | \r |
1f33a17f | 467 | @param AllocationSize The number of bytes to allocate and zero.\r |
468 | \r | |
469 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 470 | \r |
471 | **/\r | |
472 | VOID *\r | |
473 | EFIAPI\r | |
474 | AllocateZeroPool (\r | |
475 | IN UINTN AllocationSize\r | |
476 | )\r | |
477 | {\r | |
478 | return InternalAllocateZeroPool (EfiBootServicesData, AllocationSize);\r | |
479 | }\r | |
480 | \r | |
481 | /**\r | |
482 | Allocates and zeros a buffer of type EfiRuntimeServicesData.\r | |
483 | \r | |
1f33a17f | 484 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, clears the\r |
485 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
486 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
487 | request, then NULL is returned.\r | |
878ddf1f | 488 | \r |
1f33a17f | 489 | @param AllocationSize The number of bytes to allocate and zero.\r |
490 | \r | |
491 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 492 | \r |
493 | **/\r | |
494 | VOID *\r | |
495 | EFIAPI\r | |
496 | AllocateRuntimeZeroPool (\r | |
497 | IN UINTN AllocationSize\r | |
498 | )\r | |
499 | {\r | |
500 | return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r | |
501 | }\r | |
502 | \r | |
503 | /**\r | |
504 | Allocates and zeros a buffer of type EfiReservedMemoryType.\r | |
505 | \r | |
1f33a17f | 506 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, clears the\r |
507 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
508 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
509 | request, then NULL is returned.\r | |
878ddf1f | 510 | \r |
1f33a17f | 511 | @param AllocationSize The number of bytes to allocate and zero.\r |
512 | \r | |
513 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 514 | \r |
515 | **/\r | |
516 | VOID *\r | |
517 | EFIAPI\r | |
518 | AllocateReservedZeroPool (\r | |
519 | IN UINTN AllocationSize\r | |
520 | )\r | |
521 | {\r | |
522 | return InternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize);\r | |
523 | }\r | |
524 | \r | |
525 | /**\r | |
1f33a17f | 526 | Copies a buffer to an allocated buffer of a certian pool type.\r |
878ddf1f | 527 | \r |
1f33a17f | 528 | Allocates the number bytes specified by AllocationSize of a certian pool type, copies\r |
529 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r | |
530 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r | |
531 | is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
532 | If Buffer is NULL, then ASSERT().\r | |
533 |