| | 1 | /** @file\r |
| | 2 | Support routines for memory allocation routines \r |
| | 3 | based on PeiService for PEI phase drivers.\r |
| | 4 | \r |
| | 5 | Copyright (c) 2006 - 2008, Intel Corporation<BR>\r |
| | 6 | All rights reserved. This program and the accompanying materials \r |
| | 7 | are licensed and made available under the terms and conditions of the BSD License \r |
| | 8 | which accompanies this distribution. The full text of the license may be found at \r |
| | 9 | http://opensource.org/licenses/bsd-license.php \r |
| | 10 | \r |
| | 11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
| | 12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
| | 13 | \r |
| | 14 | **/\r |
| | 15 | \r |
| | 16 | \r |
| | 17 | #include <PiPei.h>\r |
| | 18 | \r |
| | 19 | \r |
| | 20 | #include <Library/MemoryAllocationLib.h>\r |
| | 21 | #include <Library/PeiServicesLib.h>\r |
| | 22 | #include <Library/BaseMemoryLib.h>\r |
| | 23 | #include <Library/DebugLib.h>\r |
| | 24 | \r |
| | 25 | \r |
| | 26 | /**\r |
| | 27 | Allocates one or more 4KB pages of a certain memory type.\r |
| | 28 | \r |
| | 29 | Allocates the number of 4KB pages of a certain memory type and returns a pointer to the allocated\r |
| | 30 | buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL is returned.\r |
| | 31 | If there is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 32 | \r |
| | 33 | @param MemoryType The type of memory to allocate.\r |
| | 34 | @param Pages The number of 4 KB pages to allocate.\r |
| | 35 | \r |
| | 36 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 37 | \r |
| | 38 | **/\r |
| | 39 | VOID *\r |
| | 40 | InternalAllocatePages (\r |
| | 41 | IN EFI_MEMORY_TYPE MemoryType, \r |
| | 42 | IN UINTN Pages\r |
| | 43 | )\r |
| | 44 | {\r |
| | 45 | EFI_STATUS Status;\r |
| | 46 | EFI_PHYSICAL_ADDRESS Memory; \r |
| | 47 | \r |
| | 48 | if (Pages == 0) {\r |
| | 49 | return NULL;\r |
| | 50 | }\r |
| | 51 | \r |
| | 52 | Status = PeiServicesAllocatePages (MemoryType, Pages, &Memory);\r |
| | 53 | if (EFI_ERROR (Status)) {\r |
| | 54 | return NULL;\r |
| | 55 | }\r |
| | 56 | return (VOID *) (UINTN) Memory;\r |
| | 57 | }\r |
| | 58 | \r |
| | 59 | /**\r |
| | 60 | Allocates one or more 4KB pages of type EfiBootServicesData.\r |
| | 61 | \r |
| | 62 | Allocates the number of 4KB pages of type EfiBootServicesData and returns a pointer to the\r |
| | 63 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r |
| | 64 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r |
| | 65 | returned.\r |
| | 66 | \r |
| | 67 | @param Pages The number of 4 KB pages to allocate.\r |
| | 68 | \r |
| | 69 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 70 | \r |
| | 71 | **/\r |
| | 72 | VOID *\r |
| | 73 | EFIAPI\r |
| | 74 | AllocatePages (\r |
| | 75 | IN UINTN Pages\r |
| | 76 | )\r |
| | 77 | {\r |
| | 78 | return InternalAllocatePages (EfiBootServicesData, Pages);\r |
| | 79 | }\r |
| | 80 | \r |
| | 81 | /**\r |
| | 82 | Allocates one or more 4KB pages of type EfiRuntimeServicesData.\r |
| | 83 | \r |
| | 84 | Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the\r |
| | 85 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r |
| | 86 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r |
| | 87 | returned.\r |
| | 88 | \r |
| | 89 | @param Pages The number of 4 KB pages to allocate.\r |
| | 90 | \r |
| | 91 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 92 | \r |
| | 93 | **/\r |
| | 94 | VOID *\r |
| | 95 | EFIAPI\r |
| | 96 | AllocateRuntimePages (\r |
| | 97 | IN UINTN Pages\r |
| | 98 | )\r |
| | 99 | {\r |
| | 100 | return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r |
| | 101 | }\r |
| | 102 | \r |
| | 103 | /**\r |
| | 104 | Allocates one or more 4KB pages of type EfiReservedMemoryType.\r |
| | 105 | \r |
| | 106 | Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a pointer to the\r |
| | 107 | allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r |
| | 108 | is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r |
| | 109 | returned.\r |
| | 110 | \r |
| | 111 | @param Pages The number of 4 KB pages to allocate.\r |
| | 112 | \r |
| | 113 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 114 | \r |
| | 115 | **/\r |
| | 116 | VOID *\r |
| | 117 | EFIAPI\r |
| | 118 | AllocateReservedPages (\r |
| | 119 | IN UINTN Pages\r |
| | 120 | )\r |
| | 121 | {\r |
| | 122 | return InternalAllocatePages (EfiReservedMemoryType, Pages);\r |
| | 123 | }\r |
| | 124 | \r |
| | 125 | /**\r |
| | 126 | Frees one or more 4KB pages that were previously allocated with one of the page allocation\r |
| | 127 | functions in the Memory Allocation Library.\r |
| | 128 | \r |
| | 129 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r |
| | 130 | must have been allocated on a previous call to the page allocation services of the Memory\r |
| | 131 | Allocation Library. If it is not possible to free allocated pages, then this function will\r |
| | 132 | perform no actions.\r |
| | 133 | \r |
| | 134 | If Buffer was not allocated with a page allocation function in the Memory Allocation Library,\r |
| | 135 | then ASSERT().\r |
| | 136 | If Pages is zero, then ASSERT().\r |
| | 137 | \r |
| | 138 | @param Buffer Pointer to the buffer of pages to free.\r |
| | 139 | @param Pages The number of 4 KB pages to free.\r |
| | 140 | \r |
| | 141 | **/\r |
| | 142 | VOID\r |
| | 143 | EFIAPI\r |
| | 144 | FreePages (\r |
| | 145 | IN VOID *Buffer,\r |
| | 146 | IN UINTN Pages\r |
| | 147 | )\r |
| | 148 | {\r |
| | 149 | ASSERT (Pages != 0);\r |
| | 150 | //\r |
| | 151 | // PEI phase does not support to free pages, so leave it as NOP.\r |
| | 152 | //\r |
| | 153 | }\r |
| | 154 | \r |
| | 155 | /**\r |
| | 156 | Allocates one or more 4KB pages of a certain memory type at a specified alignment.\r |
| | 157 | \r |
| | 158 | Allocates the number of 4KB pages specified by Pages of a certain memory type with an alignment\r |
| | 159 | specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is returned.\r |
| | 160 | If there is not enough memory at the specified alignment remaining to satisfy the request, then\r |
| | 161 | NULL is returned.\r |
| | 162 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
| | 163 | \r |
| | 164 | @param MemoryType The type of memory to allocate.\r |
| | 165 | @param Pages The number of 4 KB pages to allocate.\r |
| | 166 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r |
| | 167 | If Alignment is zero, then byte alignment is used.\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 | InternalAllocateAlignedPages (\r |
| | 174 | IN EFI_MEMORY_TYPE MemoryType, \r |
| | 175 | IN UINTN Pages,\r |
| | 176 | IN UINTN Alignment\r |
| | 177 | )\r |
| | 178 | {\r |
| | 179 | VOID *Memory;\r |
| | 180 | UINTN AlignmentMask;\r |
| | 181 | \r |
| | 182 | //\r |
| | 183 | // Alignment must be a power of two or zero.\r |
| | 184 | //\r |
| | 185 | ASSERT ((Alignment & (Alignment - 1)) == 0);\r |
| | 186 | \r |
| | 187 | if (Pages == 0) {\r |
| | 188 | return NULL;\r |
| | 189 | }\r |
| | 190 | //\r |
| | 191 | // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.\r |
| | 192 | //\r |
| | 193 | ASSERT (Pages <= (MAX_ADDRESS - EFI_SIZE_TO_PAGES (Alignment)));\r |
| | 194 | //\r |
| | 195 | // We would rather waste some memory to save PEI code size.\r |
| | 196 | //\r |
| | 197 | Memory = InternalAllocatePages (MemoryType, Pages + EFI_SIZE_TO_PAGES (Alignment));\r |
| | 198 | if (Alignment == 0) {\r |
| | 199 | AlignmentMask = Alignment;\r |
| | 200 | } else {\r |
| | 201 | AlignmentMask = Alignment - 1; \r |
| | 202 | }\r |
| | 203 | return (VOID *) (UINTN) (((UINTN) Memory + AlignmentMask) & ~AlignmentMask);\r |
| | 204 | }\r |
| | 205 | \r |
| | 206 | /**\r |
| | 207 | Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.\r |
| | 208 | \r |
| | 209 | Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an\r |
| | 210 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r |
| | 211 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r |
| | 212 | request, then NULL is returned.\r |
| | 213 | \r |
| | 214 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
| | 215 | \r |
| | 216 | @param Pages The number of 4 KB pages to allocate.\r |
| | 217 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r |
| | 218 | If Alignment is zero, then byte alignment is used.\r |
| | 219 | \r |
| | 220 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 221 | \r |
| | 222 | **/\r |
| | 223 | VOID *\r |
| | 224 | EFIAPI\r |
| | 225 | AllocateAlignedPages (\r |
| | 226 | IN UINTN Pages,\r |
| | 227 | IN UINTN Alignment\r |
| | 228 | )\r |
| | 229 | {\r |
| | 230 | return InternalAllocateAlignedPages (EfiBootServicesData, Pages, Alignment);\r |
| | 231 | }\r |
| | 232 | \r |
| | 233 | /**\r |
| | 234 | Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.\r |
| | 235 | \r |
| | 236 | Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData with an\r |
| | 237 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r |
| | 238 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r |
| | 239 | request, then NULL is returned.\r |
| | 240 | \r |
| | 241 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
| | 242 | \r |
| | 243 | @param Pages The number of 4 KB pages to allocate.\r |
| | 244 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r |
| | 245 | If Alignment is zero, then byte alignment is used.\r |
| | 246 | \r |
| | 247 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 248 | \r |
| | 249 | **/\r |
| | 250 | VOID *\r |
| | 251 | EFIAPI\r |
| | 252 | AllocateAlignedRuntimePages (\r |
| | 253 | IN UINTN Pages,\r |
| | 254 | IN UINTN Alignment\r |
| | 255 | )\r |
| | 256 | {\r |
| | 257 | return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r |
| | 258 | }\r |
| | 259 | \r |
| | 260 | /**\r |
| | 261 | Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.\r |
| | 262 | \r |
| | 263 | Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType with an\r |
| | 264 | alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r |
| | 265 | returned. If there is not enough memory at the specified alignment remaining to satisfy the\r |
| | 266 | request, then NULL is returned.\r |
| | 267 | \r |
| | 268 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r |
| | 269 | \r |
| | 270 | @param Pages The number of 4 KB pages to allocate.\r |
| | 271 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r |
| | 272 | If Alignment is zero, then byte alignment is used.\r |
| | 273 | \r |
| | 274 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 275 | \r |
| | 276 | **/\r |
| | 277 | VOID *\r |
| | 278 | EFIAPI\r |
| | 279 | AllocateAlignedReservedPages (\r |
| | 280 | IN UINTN Pages,\r |
| | 281 | IN UINTN Alignment\r |
| | 282 | )\r |
| | 283 | {\r |
| | 284 | return InternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment);\r |
| | 285 | }\r |
| | 286 | \r |
| | 287 | /**\r |
| | 288 | Frees one or more 4KB pages that were previously allocated with one of the aligned page\r |
| | 289 | allocation functions in the Memory Allocation Library.\r |
| | 290 | \r |
| | 291 | Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r |
| | 292 | must have been allocated on a previous call to the aligned page allocation services of the Memory\r |
| | 293 | Allocation Library. If it is not possible to free allocated pages, then this function will \r |
| | 294 | perform no actions.\r |
| | 295 | \r |
| | 296 | If Buffer was not allocated with an aligned page allocation function in the Memory Allocation\r |
| | 297 | Library, then ASSERT().\r |
| | 298 | If Pages is zero, then ASSERT().\r |
| | 299 | \r |
| | 300 | @param Buffer Pointer to the buffer of pages to free.\r |
| | 301 | @param Pages The number of 4 KB pages to free.\r |
| | 302 | \r |
| | 303 | **/\r |
| | 304 | VOID\r |
| | 305 | EFIAPI\r |
| | 306 | FreeAlignedPages (\r |
| | 307 | IN VOID *Buffer,\r |
| | 308 | IN UINTN Pages\r |
| | 309 | )\r |
| | 310 | {\r |
| | 311 | ASSERT (Pages != 0);\r |
| | 312 | //\r |
| | 313 | // PEI phase does not support to free pages, so leave it as NOP.\r |
| | 314 | //\r |
| | 315 | }\r |
| | 316 | \r |
| | 317 | /**\r |
| | 318 | Allocates a buffer of a certain pool type.\r |
| | 319 | \r |
| | 320 | Allocates the number bytes specified by AllocationSize of a certain pool type and returns a\r |
| | 321 | pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r |
| | 322 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 323 | \r |
| | 324 | @param MemoryType The type of memory to allocate.\r |
| | 325 | @param AllocationSize The number of bytes to allocate.\r |
| | 326 | \r |
| | 327 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 328 | \r |
| | 329 | **/\r |
| | 330 | VOID *\r |
| | 331 | InternalAllocatePool (\r |
| | 332 | IN EFI_MEMORY_TYPE MemoryType, \r |
| | 333 | IN UINTN AllocationSize\r |
| | 334 | )\r |
| | 335 | {\r |
| | 336 | //\r |
| | 337 | // If we need lots of small runtime/reserved memory type from PEI in the future, \r |
| | 338 | // we can consider providing a more complex algorithm that allocates runtime pages and \r |
| | 339 | // provide pool allocations from those pages. \r |
| | 340 | //\r |
| | 341 | return InternalAllocatePages (MemoryType, EFI_SIZE_TO_PAGES (AllocationSize));\r |
| | 342 | }\r |
| | 343 | \r |
| | 344 | /**\r |
| | 345 | Allocates a buffer of type EfiBootServicesData.\r |
| | 346 | \r |
| | 347 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a\r |
| | 348 | pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r |
| | 349 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 350 | \r |
| | 351 | @param AllocationSize The number of bytes to allocate.\r |
| | 352 | \r |
| | 353 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 354 | \r |
| | 355 | **/\r |
| | 356 | VOID *\r |
| | 357 | EFIAPI\r |
| | 358 | AllocatePool (\r |
| | 359 | IN UINTN AllocationSize\r |
| | 360 | )\r |
| | 361 | {\r |
| | 362 | EFI_STATUS Status;\r |
| | 363 | VOID *Buffer;\r |
| | 364 | \r |
| | 365 | Status = PeiServicesAllocatePool (AllocationSize, &Buffer);\r |
| | 366 | if (EFI_ERROR (Status)) {\r |
| | 367 | Buffer = NULL;\r |
| | 368 | }\r |
| | 369 | return Buffer;\r |
| | 370 | }\r |
| | 371 | \r |
| | 372 | /**\r |
| | 373 | Allocates a buffer of type EfiRuntimeServicesData.\r |
| | 374 | \r |
| | 375 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData and returns\r |
| | 376 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r |
| | 377 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 378 | \r |
| | 379 | @param AllocationSize The number of bytes to allocate.\r |
| | 380 | \r |
| | 381 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 382 | \r |
| | 383 | **/\r |
| | 384 | VOID *\r |
| | 385 | EFIAPI\r |
| | 386 | AllocateRuntimePool (\r |
| | 387 | IN UINTN AllocationSize\r |
| | 388 | )\r |
| | 389 | {\r |
| | 390 | return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r |
| | 391 | }\r |
| | 392 | \r |
| | 393 | /**\r |
| | 394 | Allocates a buffer of type EfiReservedMemoryType.\r |
| | 395 | \r |
| | 396 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType and returns\r |
| | 397 | a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r |
| | 398 | returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 399 | \r |
| | 400 | @param AllocationSize The number of bytes to allocate.\r |
| | 401 | \r |
| | 402 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 403 | \r |
| | 404 | **/\r |
| | 405 | VOID *\r |
| | 406 | EFIAPI\r |
| | 407 | AllocateReservedPool (\r |
| | 408 | IN UINTN AllocationSize\r |
| | 409 | )\r |
| | 410 | {\r |
| | 411 | return InternalAllocatePool (EfiReservedMemoryType, AllocationSize);\r |
| | 412 | }\r |
| | 413 | \r |
| | 414 | /**\r |
| | 415 | Allocates and zeros a buffer of a certain pool type.\r |
| | 416 | \r |
| | 417 | Allocates the number bytes specified by AllocationSize of a certain pool type, clears the buffer\r |
| | 418 | with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a valid\r |
| | 419 | buffer of 0 size is returned. If there is not enough memory remaining to satisfy the request,\r |
| | 420 | then NULL is returned.\r |
| | 421 | \r |
| | 422 | @param PoolType The type of memory to allocate.\r |
| | 423 | @param AllocationSize The number of bytes to allocate and zero.\r |
| | 424 | \r |
| | 425 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 426 | \r |
| | 427 | **/\r |
| | 428 | VOID *\r |
| | 429 | InternalAllocateZeroPool (\r |
| | 430 | IN EFI_MEMORY_TYPE PoolType, \r |
| | 431 | IN UINTN AllocationSize\r |
| | 432 | ) \r |
| | 433 | {\r |
| | 434 | VOID *Memory;\r |
| | 435 | \r |
| | 436 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r |
| | 437 | if (Memory != NULL) {\r |
| | 438 | Memory = ZeroMem (Memory, AllocationSize);\r |
| | 439 | }\r |
| | 440 | return Memory;\r |
| | 441 | }\r |
| | 442 | \r |
| | 443 | /**\r |
| | 444 | Allocates and zeros a buffer of type EfiBootServicesData.\r |
| | 445 | \r |
| | 446 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the\r |
| | 447 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r |
| | 448 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r |
| | 449 | request, then NULL is returned.\r |
| | 450 | \r |
| | 451 | @param AllocationSize The number of bytes to allocate and zero.\r |
| | 452 | \r |
| | 453 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 454 | \r |
| | 455 | **/\r |
| | 456 | VOID *\r |
| | 457 | EFIAPI\r |
| | 458 | AllocateZeroPool (\r |
| | 459 | IN UINTN AllocationSize\r |
| | 460 | )\r |
| | 461 | {\r |
| | 462 | VOID *Memory;\r |
| | 463 | \r |
| | 464 | Memory = AllocatePool (AllocationSize);\r |
| | 465 | if (Memory != NULL) {\r |
| | 466 | Memory = ZeroMem (Memory, AllocationSize);\r |
| | 467 | }\r |
| | 468 | return Memory;\r |
| | 469 | }\r |
| | 470 | \r |
| | 471 | /**\r |
| | 472 | Allocates and zeros a buffer of type EfiRuntimeServicesData.\r |
| | 473 | \r |
| | 474 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, clears the\r |
| | 475 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r |
| | 476 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r |
| | 477 | request, then NULL is returned.\r |
| | 478 | \r |
| | 479 | @param AllocationSize The number of bytes to allocate and zero.\r |
| | 480 | \r |
| | 481 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 482 | \r |
| | 483 | **/\r |
| | 484 | VOID *\r |
| | 485 | EFIAPI\r |
| | 486 | AllocateRuntimeZeroPool (\r |
| | 487 | IN UINTN AllocationSize\r |
| | 488 | )\r |
| | 489 | {\r |
| | 490 | return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r |
| | 491 | }\r |
| | 492 | \r |
| | 493 | /**\r |
| | 494 | Allocates and zeros a buffer of type EfiReservedMemoryType.\r |
| | 495 | \r |
| | 496 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, clears the\r |
| | 497 | buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r |
| | 498 | valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r |
| | 499 | request, then NULL is returned.\r |
| | 500 | \r |
| | 501 | @param AllocationSize The number of bytes to allocate and zero.\r |
| | 502 | \r |
| | 503 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 504 | \r |
| | 505 | **/\r |
| | 506 | VOID *\r |
| | 507 | EFIAPI\r |
| | 508 | AllocateReservedZeroPool (\r |
| | 509 | IN UINTN AllocationSize\r |
| | 510 | )\r |
| | 511 | {\r |
| | 512 | return InternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize);\r |
| | 513 | }\r |
| | 514 | \r |
| | 515 | /**\r |
| | 516 | Copies a buffer to an allocated buffer of a certain pool type.\r |
| | 517 | \r |
| | 518 | Allocates the number bytes specified by AllocationSize of a certain pool type, copies\r |
| | 519 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r |
| | 520 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r |
| | 521 | is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 522 | If Buffer is NULL, then ASSERT().\r |
| | 523 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
| | 524 | \r |
| | 525 | @param PoolType The type of pool to allocate.\r |
| | 526 | @param AllocationSize The number of bytes to allocate and zero.\r |
| | 527 | @param Buffer The buffer to copy to the allocated buffer.\r |
| | 528 | \r |
| | 529 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 530 | \r |
| | 531 | **/\r |
| | 532 | VOID *\r |
| | 533 | InternalAllocateCopyPool (\r |
| | 534 | IN EFI_MEMORY_TYPE PoolType, \r |
| | 535 | IN UINTN AllocationSize,\r |
| | 536 | IN CONST VOID *Buffer\r |
| | 537 | ) \r |
| | 538 | {\r |
| | 539 | VOID *Memory;\r |
| | 540 | \r |
| | 541 | ASSERT (Buffer != NULL);\r |
| | 542 | ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));\r |
| | 543 | \r |
| | 544 | Memory = InternalAllocatePool (PoolType, AllocationSize);\r |
| | 545 | if (Memory != NULL) {\r |
| | 546 | Memory = CopyMem (Memory, Buffer, AllocationSize);\r |
| | 547 | }\r |
| | 548 | return Memory;\r |
| | 549 | } \r |
| | 550 | \r |
| | 551 | /**\r |
| | 552 | Copies a buffer to an allocated buffer of type EfiBootServicesData.\r |
| | 553 | \r |
| | 554 | Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, copies\r |
| | 555 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r |
| | 556 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r |
| | 557 | is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 558 | \r |
| | 559 | If Buffer is NULL, then ASSERT().\r |
| | 560 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
| | 561 | \r |
| | 562 | @param AllocationSize The number of bytes to allocate and zero.\r |
| | 563 | @param Buffer The buffer to copy to the allocated buffer.\r |
| | 564 | \r |
| | 565 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 566 | \r |
| | 567 | **/\r |
| | 568 | VOID *\r |
| | 569 | EFIAPI\r |
| | 570 | AllocateCopyPool (\r |
| | 571 | IN UINTN AllocationSize,\r |
| | 572 | IN CONST VOID *Buffer\r |
| | 573 | )\r |
| | 574 | {\r |
| | 575 | VOID *Memory;\r |
| | 576 | \r |
| | 577 | ASSERT (Buffer != NULL);\r |
| | 578 | ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));\r |
| | 579 | \r |
| | 580 | Memory = AllocatePool (AllocationSize);\r |
| | 581 | if (Memory != NULL) {\r |
| | 582 | Memory = CopyMem (Memory, Buffer, AllocationSize);\r |
| | 583 | }\r |
| | 584 | return Memory;\r |
| | 585 | }\r |
| | 586 | \r |
| | 587 | /**\r |
| | 588 | Copies a buffer to an allocated buffer of type EfiRuntimeServicesData.\r |
| | 589 | \r |
| | 590 | Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, copies\r |
| | 591 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r |
| | 592 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r |
| | 593 | is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 594 | \r |
| | 595 | If Buffer is NULL, then ASSERT().\r |
| | 596 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
| | 597 | \r |
| | 598 | @param AllocationSize The number of bytes to allocate and zero.\r |
| | 599 | @param Buffer The buffer to copy to the allocated buffer.\r |
| | 600 | \r |
| | 601 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 602 | \r |
| | 603 | **/\r |
| | 604 | VOID *\r |
| | 605 | EFIAPI\r |
| | 606 | AllocateRuntimeCopyPool (\r |
| | 607 | IN UINTN AllocationSize,\r |
| | 608 | IN CONST VOID *Buffer\r |
| | 609 | )\r |
| | 610 | {\r |
| | 611 | return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);\r |
| | 612 | }\r |
| | 613 | \r |
| | 614 | /**\r |
| | 615 | Copies a buffer to an allocated buffer of type EfiReservedMemoryType.\r |
| | 616 | \r |
| | 617 | Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, copies\r |
| | 618 | AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r |
| | 619 | allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r |
| | 620 | is not enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 621 | \r |
| | 622 | If Buffer is NULL, then ASSERT().\r |
| | 623 | If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r |
| | 624 | \r |
| | 625 | @param AllocationSize The number of bytes to allocate and zero.\r |
| | 626 | @param Buffer The buffer to copy to the allocated buffer.\r |
| | 627 | \r |
| | 628 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 629 | \r |
| | 630 | **/\r |
| | 631 | VOID *\r |
| | 632 | EFIAPI\r |
| | 633 | AllocateReservedCopyPool (\r |
| | 634 | IN UINTN AllocationSize,\r |
| | 635 | IN CONST VOID *Buffer\r |
| | 636 | )\r |
| | 637 | {\r |
| | 638 | return InternalAllocateCopyPool (EfiReservedMemoryType, AllocationSize, Buffer);\r |
| | 639 | }\r |
| | 640 | \r |
| | 641 | /**\r |
| | 642 | Reallocates a buffer of a specified memory type.\r |
| | 643 | \r |
| | 644 | Allocates and zeros the number bytes specified by NewSize from memory of the type\r |
| | 645 | specified by PoolType. If OldBuffer is not NULL, then the smaller of OldSize and \r |
| | 646 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r |
| | 647 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r |
| | 648 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r |
| | 649 | enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 650 | \r |
| | 651 | If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r |
| | 652 | is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r |
| | 653 | \r |
| | 654 | @param PoolType The type of pool to allocate.\r |
| | 655 | @param OldSize The size, in bytes, of OldBuffer.\r |
| | 656 | @param NewSize The size, in bytes, of the buffer to reallocate.\r |
| | 657 | @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r |
| | 658 | parameter that may be NULL.\r |
| | 659 | \r |
| | 660 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 661 | \r |
| | 662 | **/\r |
| | 663 | VOID *\r |
| | 664 | InternalReallocatePool (\r |
| | 665 | IN EFI_MEMORY_TYPE PoolType, \r |
| | 666 | IN UINTN OldSize,\r |
| | 667 | IN UINTN NewSize,\r |
| | 668 | IN VOID *OldBuffer OPTIONAL\r |
| | 669 | )\r |
| | 670 | {\r |
| | 671 | VOID *NewBuffer;\r |
| | 672 | \r |
| | 673 | NewBuffer = InternalAllocateZeroPool (PoolType, NewSize);\r |
| | 674 | if (NewBuffer != NULL && OldBuffer != NULL) {\r |
| | 675 | CopyMem (NewBuffer, OldBuffer, MIN (OldSize, NewSize));\r |
| | 676 | FreePool (OldBuffer);\r |
| | 677 | }\r |
| | 678 | return NewBuffer;\r |
| | 679 | }\r |
| | 680 | \r |
| | 681 | /**\r |
| | 682 | Reallocates a buffer of type EfiBootServicesData.\r |
| | 683 | \r |
| | 684 | Allocates and zeros the number bytes specified by NewSize from memory of type\r |
| | 685 | EfiBootServicesData. If OldBuffer is not NULL, then the smaller of OldSize and \r |
| | 686 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r |
| | 687 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r |
| | 688 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r |
| | 689 | enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 690 | \r |
| | 691 | If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r |
| | 692 | is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r |
| | 693 | \r |
| | 694 | @param OldSize The size, in bytes, of OldBuffer.\r |
| | 695 | @param NewSize The size, in bytes, of the buffer to reallocate.\r |
| | 696 | @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r |
| | 697 | parameter that may be NULL.\r |
| | 698 | \r |
| | 699 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 700 | \r |
| | 701 | **/\r |
| | 702 | VOID *\r |
| | 703 | EFIAPI\r |
| | 704 | ReallocatePool (\r |
| | 705 | IN UINTN OldSize,\r |
| | 706 | IN UINTN NewSize,\r |
| | 707 | IN VOID *OldBuffer OPTIONAL\r |
| | 708 | )\r |
| | 709 | {\r |
| | 710 | return InternalReallocatePool (EfiBootServicesData, OldSize, NewSize, OldBuffer);\r |
| | 711 | }\r |
| | 712 | \r |
| | 713 | /**\r |
| | 714 | Reallocates a buffer of type EfiRuntimeServicesData.\r |
| | 715 | \r |
| | 716 | Allocates and zeros the number bytes specified by NewSize from memory of type\r |
| | 717 | EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize and \r |
| | 718 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r |
| | 719 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r |
| | 720 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r |
| | 721 | enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 722 | \r |
| | 723 | If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r |
| | 724 | is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r |
| | 725 | \r |
| | 726 | @param OldSize The size, in bytes, of OldBuffer.\r |
| | 727 | @param NewSize The size, in bytes, of the buffer to reallocate.\r |
| | 728 | @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r |
| | 729 | parameter that may be NULL.\r |
| | 730 | \r |
| | 731 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 732 | \r |
| | 733 | **/\r |
| | 734 | VOID *\r |
| | 735 | EFIAPI\r |
| | 736 | ReallocateRuntimePool (\r |
| | 737 | IN UINTN OldSize,\r |
| | 738 | IN UINTN NewSize,\r |
| | 739 | IN VOID *OldBuffer OPTIONAL\r |
| | 740 | )\r |
| | 741 | {\r |
| | 742 | return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);\r |
| | 743 | }\r |
| | 744 | \r |
| | 745 | /**\r |
| | 746 | Reallocates a buffer of type EfiReservedMemoryType.\r |
| | 747 | \r |
| | 748 | Allocates and zeros the number bytes specified by NewSize from memory of type\r |
| | 749 | EfiReservedMemoryType. If OldBuffer is not NULL, then the smaller of OldSize and \r |
| | 750 | NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r |
| | 751 | OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r |
| | 752 | If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r |
| | 753 | enough memory remaining to satisfy the request, then NULL is returned.\r |
| | 754 | \r |
| | 755 | If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r |
| | 756 | is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r |
| | 757 | \r |
| | 758 | @param OldSize The size, in bytes, of OldBuffer.\r |
| | 759 | @param NewSize The size, in bytes, of the buffer to reallocate.\r |
| | 760 | @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r |
| | 761 | parameter that may be NULL.\r |
| | 762 | \r |
| | 763 | @return A pointer to the allocated buffer or NULL if allocation fails.\r |
| | 764 | \r |
| | 765 | **/\r |
| | 766 | VOID *\r |
| | 767 | EFIAPI\r |
| | 768 | ReallocateReservedPool (\r |
| | 769 | IN UINTN OldSize,\r |
| | 770 | IN UINTN NewSize,\r |
| | 771 | IN VOID *OldBuffer OPTIONAL\r |
| | 772 | )\r |
| | 773 | {\r |
| | 774 | return InternalReallocatePool (EfiReservedMemoryType, OldSize, NewSize, OldBuffer);\r |
| | 775 | }\r |
| | 776 | \r |
| | 777 | /**\r |
| | 778 | Frees a buffer that was previously allocated with one of the pool allocation functions in the\r |
| | 779 | Memory Allocation Library.\r |
| | 780 | \r |
| | 781 | Frees the buffer specified by Buffer. Buffer must have been allocated on a previous call to the\r |
| | 782 | pool allocation services of the Memory Allocation Library. If it is not possible to free pool\r |
| | 783 | resources, then this function will perform no actions.\r |
| | 784 | \r |
| | 785 | If Buffer was not allocated with a pool allocation function in the Memory Allocation Library,\r |
| | 786 | then ASSERT().\r |
| | 787 | \r |
| | 788 | @param Buffer Pointer to the buffer to free.\r |
| | 789 | \r |
| | 790 | **/\r |
| | 791 | VOID\r |
| | 792 | EFIAPI\r |
| | 793 | FreePool (\r |
| | 794 | IN VOID *Buffer\r |
| | 795 | )\r |
| | 796 | {\r |
| | 797 | //\r |
| | 798 | // PEI phase does not support to free pool, so leave it as NOP.\r |
| | 799 | //\r |
| | 800 | }\r |
| | 801 | \r |
| | 802 | \r |
projects / mirror_edk2.git / blame_incremental