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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 | EFI_PEI_SERVICES **PeiServices;\r | |
40 | \r | |
41 | if (Pages == 0) {\r | |
42 | return NULL;\r | |
43 | }\r | |
44 | \r | |
45 | PeiServices = GetPeiServicesTablePointer ();\r | |
46 | Status = (*PeiServices)->AllocatePages (PeiServices, MemoryType, Pages, &Memory);\r | |
47 | if (EFI_ERROR (Status)) {\r | |
48 | Memory = 0;\r | |
49 | }\r | |
50 | return (VOID *) (UINTN) Memory;\r | |
51 | }\r | |
52 | \r | |
53 | /**\r | |
1f33a17f | 54 | Allocates one or more 4KB pages of type EfiBootServicesData.\r |
878ddf1f | 55 | \r |
1f33a17f | 56 | Allocates the number of 4KB pages of type EfiBootServicesData and returns a pointer to the\r |
57 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
58 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
59 | returned.\r | |
878ddf1f | 60 | \r |
1f33a17f | 61 | @param Pages The number of 4 KB pages to allocate.\r |
62 | \r | |
63 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 64 | \r |
65 | **/\r | |
66 | VOID *\r | |
67 | EFIAPI\r | |
68 | AllocatePages (\r | |
69 | IN UINTN Pages\r | |
70 | )\r | |
71 | {\r | |
72 | return InternalAllocatePages (EfiBootServicesData, Pages);\r | |
73 | }\r | |
74 | \r | |
75 | /**\r | |
1f33a17f | 76 | Allocates one or more 4KB pages of type EfiRuntimeServicesData.\r |
878ddf1f | 77 | \r |
1f33a17f | 78 | Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the\r |
79 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
80 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
81 | returned.\r | |
878ddf1f | 82 | \r |
1f33a17f | 83 | @param Pages The number of 4 KB pages to allocate.\r |
84 | \r | |
85 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 86 | \r |
87 | **/\r | |
88 | VOID *\r | |
89 | EFIAPI\r | |
90 | AllocateRuntimePages (\r | |
91 | IN UINTN Pages\r | |
92 | )\r | |
93 | {\r | |
94 | return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r | |
95 | }\r | |
96 | \r | |
97 | /**\r | |
1f33a17f | 98 | Allocates one or more 4KB pages of type EfiReservedMemoryType.\r |
878ddf1f | 99 | \r |
1f33a17f | 100 | Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a pointer to the\r |
101 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r | |
102 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r | |
103 | returned.\r | |
878ddf1f | 104 | \r |
1f33a17f | 105 | @param Pages The number of 4 KB pages to allocate.\r |
106 | \r | |
107 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 108 | \r |
109 | **/\r | |
110 | VOID *\r | |
111 | EFIAPI\r | |
112 | AllocateReservedPages (\r | |
113 | IN UINTN Pages\r | |
114 | )\r | |
115 | {\r | |
116 | return InternalAllocatePages (EfiReservedMemoryType, Pages);\r | |
117 | }\r | |
118 | \r | |
119 | /**\r | |
1f33a17f | 120 | Frees one or more 4KB pages that were previously allocated with one of the page allocation\r |
121 | functions in the Memory Allocation Library.\r | |
122 | \r | |
123 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r | |
124 | must have been allocated on a previous call to the page allocation services of the Memory\r | |
125 | Allocation Library.\r | |
126 | If Buffer was not allocated with a page allocation function in the Memory Allocation Library,\r | |
127 | then ASSERT().\r | |
128 | If Pages is zero, then ASSERT().\r | |
129 | \r | |
130 | @param Buffer Pointer to the buffer of pages to free.\r | |
131 | @param Pages The number of 4 KB pages to free.\r | |
878ddf1f | 132 | \r |
133 | **/\r | |
134 | VOID\r | |
135 | EFIAPI\r | |
136 | FreePages (\r | |
137 | IN VOID *Buffer,\r | |
138 | IN UINTN Pages\r | |
139 | )\r | |
140 | {\r | |
141 | //\r | |
142 | // PEI phase does not support to free pages, so leave it as NOP.\r | |
143 | //\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 |
148 | \r | |
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 | |
878ddf1f | 159 | \r |
1f33a17f | 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 | VOID *Memory;\r | |
171 | UINTN AlignmentMask;\r | |
172 | \r | |
173 | //\r | |
174 | // Alignment must be a power of two or zero.\r | |
175 | //\r | |
176 | ASSERT ((Alignment & (Alignment - 1)) == 0);\r | |
177 | \r | |
178 | if (Pages == 0) {\r | |
179 | return NULL;\r | |
180 | }\r | |
181 | //\r | |
a3657e3e | 182 | // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.\r |
183 | //\r | |
184 | ASSERT (Pages <= (MAX_ADDRESS - EFI_SIZE_TO_PAGES (Alignment)));\r | |
185 | //\r | |
878ddf1f | 186 | // We would rather waste some memory to save PEI code size.\r |
187 | //\r | |
188 | Memory = InternalAllocatePages (MemoryType, Pages + EFI_SIZE_TO_PAGES (Alignment));\r | |
189 | if (Alignment == 0) {\r | |
190 | AlignmentMask = Alignment;\r | |
191 | } else {\r | |
192 | AlignmentMask = Alignment - 1; \r | |
193 | }\r | |
194 | return (VOID *) (UINTN) (((UINTN) Memory + AlignmentMask) & ~AlignmentMask);\r | |
195 | }\r | |
196 | \r | |
197 | /**\r | |
1f33a17f | 198 | Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.\r |
878ddf1f | 199 | \r |
1f33a17f | 200 | Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an\r |
201 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
202 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
203 | request, then NULL is returned.\r | |
204 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
878ddf1f | 205 | \r |
1f33a17f | 206 | @param Pages The number of 4 KB pages to allocate.\r |
207 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r | |
208 | If Alignment is zero, then byte alignment is used.\r | |
209 | \r | |
210 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 211 | \r |
212 | **/\r | |
213 | VOID *\r | |
214 | EFIAPI\r | |
215 | AllocateAlignedPages (\r | |
216 | IN UINTN Pages,\r | |
217 | IN UINTN Alignment\r | |
218 | )\r | |
219 | {\r | |
220 | return InternalAllocateAlignedPages (EfiBootServicesData, Pages, Alignment);\r | |
221 | }\r | |
222 | \r | |
223 | /**\r | |
1f33a17f | 224 | Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.\r |
225 | \r | |
226 | Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData with an\r | |
227 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
228 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
229 | request, then NULL is returned.\r | |
230 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
878ddf1f | 231 | \r |
1f33a17f | 232 | @param Pages The number of 4 KB pages to allocate.\r |
233 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r | |
234 | If Alignment is zero, then byte alignment is used.\r | |
878ddf1f | 235 | \r |
1f33a17f | 236 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
878ddf1f | 237 | \r |
238 | **/\r | |
239 | VOID *\r | |
240 | EFIAPI\r | |
241 | AllocateAlignedRuntimePages (\r | |
242 | IN UINTN Pages,\r | |
243 | IN UINTN Alignment\r | |
244 | )\r | |
245 | {\r | |
246 | return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r | |
247 | }\r | |
248 | \r | |
249 | /**\r | |
250 | Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.\r | |
251 | \r | |
1f33a17f | 252 | Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType with an\r |
253 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r | |
254 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r | |
255 | request, then NULL is returned.\r | |
256 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
878ddf1f | 257 | \r |
1f33a17f | 258 | @param Pages The number of 4 KB pages to allocate.\r |
259 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r | |
260 | If Alignment is zero, then byte alignment is used.\r | |
261 | \r | |
262 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 263 | \r |
264 | **/\r | |
265 | VOID *\r | |
266 | EFIAPI\r | |
267 | AllocateAlignedReservedPages (\r | |
268 | IN UINTN Pages,\r | |
269 | IN UINTN Alignment\r | |
270 | )\r | |
271 | {\r | |
272 | return InternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment);\r | |
273 | }\r | |
274 | \r | |
275 | /**\r | |
1f33a17f | 276 | Frees one or more 4KB pages that were previously allocated with one of the aligned page\r |
277 | allocation functions in the Memory Allocation Library.\r | |
278 | \r | |
279 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r | |
280 | must have been allocated on a previous call to the aligned page allocation services of the Memory\r | |
281 | Allocation Library.\r | |
282 | If Buffer was not allocated with an aligned page allocation function in the Memory Allocation\r | |
283 | Library, then ASSERT().\r | |
284 | If Pages is zero, then ASSERT().\r | |
285 | \r | |
286 | @param Buffer Pointer to the buffer of pages to free.\r | |
287 | @param Pages The number of 4 KB pages to free.\r | |
878ddf1f | 288 | \r |
289 | **/\r | |
290 | VOID\r | |
291 | EFIAPI\r | |
292 | FreeAlignedPages (\r | |
293 | IN VOID *Buffer,\r | |
294 | IN UINTN Pages\r | |
295 | )\r | |
296 | {\r | |
297 | //\r | |
298 | // PEI phase does not support to free pages, so leave it as NOP.\r | |
299 | //\r | |
300 | }\r | |
301 | \r | |
302 | /**\r | |
1f33a17f | 303 | Allocates a buffer of a certain pool type.\r |
878ddf1f | 304 | \r |
1f33a17f | 305 | Allocates the number bytes specified by AllocationSize of a certain pool type and returns a\r |
306 | pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
307 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
878ddf1f | 308 | \r |
1f33a17f | 309 | @param MemoryType The type of memory to allocate.\r |
310 | @param AllocationSize The number of bytes to allocate.\r | |
311 | \r | |
312 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 313 | \r |
314 | **/\r | |
315 | VOID *\r | |
316 | InternalAllocatePool (\r | |
317 | IN EFI_MEMORY_TYPE MemoryType, \r | |
318 | IN UINTN AllocationSize\r | |
319 | )\r | |
320 | {\r | |
321 | //\r | |
322 | // If we need lots of small runtime/reserved memory type from PEI in the future, \r | |
323 | // we can consider providing a more complex algorithm that allocates runtime pages and \r | |
324 | // provide pool allocations from those pages. \r | |
325 | //\r | |
326 | return InternalAllocatePages (MemoryType, EFI_SIZE_TO_PAGES (AllocationSize));\r | |
327 | }\r | |
328 | \r | |
329 | /**\r | |
330 | Allocates a buffer of type EfiBootServicesData.\r | |
331 | \r | |
1f33a17f | 332 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a\r |
333 | pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
334 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
878ddf1f | 335 | \r |
1f33a17f | 336 | @param AllocationSize The number of bytes to allocate.\r |
337 | \r | |
338 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 339 | \r |
340 | **/\r | |
341 | VOID *\r | |
342 | EFIAPI\r | |
343 | AllocatePool (\r | |
344 | IN UINTN AllocationSize\r | |
345 | )\r | |
346 | {\r | |
347 | EFI_STATUS Status;\r | |
348 | EFI_PEI_SERVICES **PeiServices;\r | |
349 | VOID *Buffer;\r | |
350 | \r | |
351 | PeiServices = GetPeiServicesTablePointer ();\r | |
352 | \r | |
353 | Status = (*PeiServices)->AllocatePool (PeiServices, AllocationSize, &Buffer);\r | |
354 | if (EFI_ERROR (Status)) {\r | |
355 | Buffer = NULL;\r | |
356 | }\r | |
357 | return Buffer;\r | |
358 | }\r | |
359 | \r | |
360 | /**\r | |
361 | Allocates a buffer of type EfiRuntimeServicesData.\r | |
362 | \r | |
1f33a17f | 363 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData and returns\r |
364 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
365 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
878ddf1f | 366 | \r |
1f33a17f | 367 | @param AllocationSize The number of bytes to allocate.\r |
368 | \r | |
369 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 370 | \r |
371 | **/\r | |
372 | VOID *\r | |
373 | EFIAPI\r | |
374 | AllocateRuntimePool (\r | |
375 | IN UINTN AllocationSize\r | |
376 | )\r | |
377 | {\r | |
378 | return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r | |
379 | }\r | |
380 | \r | |
381 | /**\r | |
1f33a17f | 382 | Allocates a buffer of type EfieservedMemoryType.\r |
878ddf1f | 383 | \r |
1f33a17f | 384 | Allocates the number bytes specified by AllocationSize of type EfieservedMemoryType and returns\r |
385 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r | |
386 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
878ddf1f | 387 | \r |
1f33a17f | 388 | @param AllocationSize The number of bytes to allocate.\r |
389 | \r | |
390 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 391 | \r |
392 | **/\r | |
393 | VOID *\r | |
394 | EFIAPI\r | |
395 | AllocateReservedPool (\r | |
396 | IN UINTN AllocationSize\r | |
397 | )\r | |
398 | {\r | |
399 | return InternalAllocatePool (EfiReservedMemoryType, AllocationSize);\r | |
400 | }\r | |
401 | \r | |
402 | /**\r | |
403 | Allocates and zeros a buffer of a certian pool type.\r | |
404 | \r | |
1f33a17f | 405 | Allocates the number bytes specified by AllocationSize of a certian pool type, clears the buffer\r |
406 | with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a valid\r | |
407 | buffer of 0 size is returned. If there is not enough memory remaining to satisfy the request,\r | |
408 | then NULL is returned.\r | |
878ddf1f | 409 | \r |
1f33a17f | 410 | @param PoolType The type of memory to allocate.\r |
411 | @param AllocationSize The number of bytes to allocate and zero.\r | |
412 | \r | |
413 | @return A pointer to the allocated buffer or NULL if allocation fails.\r | |
878ddf1f | 414 | \r |
415 | **/\r | |
416 | VOID *\r | |
417 | InternalAllocateZeroPool (\r | |
418 | IN EFI_MEMORY_TYPE PoolType, \r | |
419 | IN UINTN AllocationSize\r | |
420 | ) \r | |
421 | {\r | |
422 | VOID *Memory;\r | |
423 | \r | |
424 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r | |
425 | if (Memory != NULL) {\r | |
426 | Memory = ZeroMem (Memory, AllocationSize);\r | |
427 | }\r | |
428 | return Memory;\r | |
429 | }\r | |
430 | \r | |
431 | /**\r | |
432 | Allocates and zeros a buffer of type EfiBootServicesData.\r | |
433 | \r | |
1f33a17f | 434 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the\r |
435 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r | |
436 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r | |
437 | request, then NULL is returned.\r | |
878ddf1f | 438 | \r |
1f33a17f | 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 | EFIAPI\r | |
446 | AllocateZeroPool (\r | |
447 | IN UINTN AllocationSize\r | |
448 | )\r | |
449 | {\r | |
450 | VOID *Memory;\r | |
451 | \r | |
452 | Memory = AllocatePool (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 EfiRuntimeServicesData.\r | |
461 | \r | |
1f33a17f | 462 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, 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 | AllocateRuntimeZeroPool (\r | |
475 | IN UINTN AllocationSize\r | |
476 | )\r | |
477 | {\r | |
478 | return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r | |
479 | }\r | |
480 | \r | |
481 | /**\r | |
482 | Allocates and zeros a buffer of type EfiReservedMemoryType.\r | |
483 | \r | |
1f33a17f | 484 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, 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 | AllocateReservedZeroPool (\r | |
497 | IN UINTN AllocationSize\r | |
498 | )\r | |
499 | {\r | |
500 | return InternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize);\r | |
501 | }\r | |
502 | \r | |
503 | /**\r | |
1f33a17f | 504 | Copies a buffer to an allocated buffer of a certian pool type.\r |
878ddf1f | 505 | \r |
1f33a17f | 506 | Allocates the number bytes specified by AllocationSize of a certian pool type, copies\r |
507 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r | |
508 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r | |
509 | is not enough memory remaining to satisfy the request, then NULL is returned.\r | |
510 | If Buffer is NULL, then ASSERT().\r | |
511 |