projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 3dc8585e JY |
1 | /** @file\r |
| 2 | ACPI Sdt Protocol Driver\r | |
| 3 | \r | |
| 4 | Copyright (c) 2010, 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 | //\r | |
| 16 | // Includes\r | |
| 17 | //\r | |
| 18 | #include "AcpiTable.h"\r | |
| 19 | \r | |
| 20 | GLOBAL_REMOVE_IF_UNREFERENCED\r | |
| 21 | EFI_ACPI_SDT_PROTOCOL mAcpiSdtProtocolTemplate = {\r | |
| 22 | EFI_ACPI_TABLE_VERSION_NONE | EFI_ACPI_TABLE_VERSION_1_0B | EFI_ACPI_TABLE_VERSION_2_0 | EFI_ACPI_TABLE_VERSION_3_0 | EFI_ACPI_TABLE_VERSION_4_0,\r | |
| 23 | GetAcpiTable2,\r | |
| 24 | RegisterNotify,\r | |
| 25 | Open,\r | |
| 26 | OpenSdt,\r | |
| 27 | Close,\r | |
| 28 | GetChild,\r | |
| 29 | GetOption,\r | |
| 30 | SetOption,\r | |
| 31 | FindPath\r | |
| 32 | };\r | |
| 33 | \r | |
| 34 | /**\r | |
| 35 | This function returns ACPI Table instance.\r | |
| 36 | \r | |
| 37 | @return AcpiTableInstance\r | |
| 38 | **/\r | |
| 39 | EFI_ACPI_TABLE_INSTANCE *\r | |
| 40 | SdtGetAcpiTableInstance (\r | |
| 41 | VOID\r | |
| 42 | )\r | |
| 43 | {\r | |
| 44 | return mPrivateData;\r | |
| 45 | }\r | |
| 46 | \r | |
| 47 | /**\r | |
| 48 | This function finds the table specified by the buffer.\r | |
| 49 | \r | |
| 50 | @param[in] Buffer Table buffer to find.\r | |
| 51 | \r | |
| 52 | @return ACPI table list.\r | |
| 53 | **/\r | |
| 54 | EFI_ACPI_TABLE_LIST *\r | |
| 55 | FindTableByBuffer (\r | |
| 56 | IN VOID *Buffer\r | |
| 57 | )\r | |
| 58 | {\r | |
| 59 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
| 60 | LIST_ENTRY *CurrentLink;\r | |
| 61 | EFI_ACPI_TABLE_LIST *CurrentTableList;\r | |
| 62 | LIST_ENTRY *StartLink;\r | |
| 63 | \r | |
| 64 | //\r | |
| 65 | // Get the instance of the ACPI Table\r | |
| 66 | //\r | |
| 67 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
| 68 | \r | |
| 69 | //\r | |
| 70 | // Find the notify\r | |
| 71 | //\r | |
| 72 | StartLink = &AcpiTableInstance->TableList;\r | |
| 73 | CurrentLink = StartLink->ForwardLink;\r | |
| 74 | \r | |
| 75 | while (CurrentLink != StartLink) {\r | |
| 76 | CurrentTableList = EFI_ACPI_TABLE_LIST_FROM_LINK (CurrentLink);\r | |
| 77 | if (((UINTN)CurrentTableList->PageAddress <= (UINTN)Buffer) &&\r | |
| 78 | ((UINTN)CurrentTableList->PageAddress + EFI_PAGES_TO_SIZE(CurrentTableList->NumberOfPages) > (UINTN)Buffer)) {\r | |
| 79 | //\r | |
| 80 | // Good! Found Table.\r | |
| 81 | //\r | |
| 82 | return CurrentTableList;\r | |
| 83 | }\r | |
| 84 | \r | |
| 85 | CurrentLink = CurrentLink->ForwardLink;\r | |
| 86 | }\r | |
| 87 | \r | |
| 88 | return NULL;\r | |
| 89 | }\r | |
| 90 | \r | |
| 91 | /**\r | |
| 92 | This function updates AML table checksum.\r | |
| 93 | It will search the ACPI table installed by ACPI_TABLE protocol.\r | |
| 94 | \r | |
| 95 | @param[in] Buffer A piece of AML code buffer pointer.\r | |
| 96 | \r | |
| 97 | @retval EFI_SUCCESS The table holds the AML buffer is found, and checksum is updated.\r | |
| 98 | @retval EFI_NOT_FOUND The table holds the AML buffer is not found.\r | |
| 99 | **/\r | |
| 100 | EFI_STATUS\r | |
| 101 | SdtUpdateAmlChecksum (\r | |
| 102 | IN VOID *Buffer\r | |
| 103 | )\r | |
| 104 | {\r | |
| 105 | EFI_ACPI_TABLE_LIST *CurrentTableList;\r | |
| 106 | \r | |
| 107 | CurrentTableList = FindTableByBuffer (Buffer);\r | |
| 108 | if (CurrentTableList == NULL) {\r | |
| 109 | return EFI_NOT_FOUND;\r | |
| 110 | }\r | |
| 111 | \r | |
| 112 | AcpiPlatformChecksum (\r | |
| 113 | (VOID *)CurrentTableList->Table,\r | |
| 114 | CurrentTableList->Table->Length,\r | |
| 115 | OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER, Checksum)\r | |
| 116 | );\r | |
| 117 | return EFI_SUCCESS;\r | |
| 118 | }\r | |
| 119 | \r | |
| 120 | /**\r | |
| 121 | This function finds MAX AML buffer size.\r | |
| 122 | It will search the ACPI table installed by ACPI_TABLE protocol.\r | |
| 123 | \r | |
| 124 | @param[in] Buffer A piece of AML code buffer pointer.\r | |
| 125 | @param[out] MaxSize On return it holds the MAX size of buffer.\r | |
| 126 | \r | |
| 127 | @retval EFI_SUCCESS The table holds the AML buffer is found, and MAX size if returned.\r | |
| 128 | @retval EFI_NOT_FOUND The table holds the AML buffer is not found.\r | |
| 129 | **/\r | |
| 130 | EFI_STATUS\r | |
| 131 | SdtGetMaxAmlBufferSize (\r | |
| 132 | IN VOID *Buffer,\r | |
| 133 | OUT UINTN *MaxSize\r | |
| 134 | )\r | |
| 135 | {\r | |
| 136 | EFI_ACPI_TABLE_LIST *CurrentTableList;\r | |
| 137 | \r | |
| 138 | CurrentTableList = FindTableByBuffer (Buffer);\r | |
| 139 | if (CurrentTableList == NULL) {\r | |
| 140 | return EFI_NOT_FOUND;\r | |
| 141 | }\r | |
| 142 | \r | |
| 143 | *MaxSize = (UINTN)CurrentTableList->Table + CurrentTableList->Table->Length - (UINTN)Buffer;\r | |
| 144 | return EFI_SUCCESS;\r | |
| 145 | }\r | |
| 146 | \r | |
| 147 | /**\r | |
| 148 | This function invokes ACPI notification.\r | |
| 149 | \r | |
| 150 | @param[in] AcpiTableInstance Instance to AcpiTable\r | |
| 151 | @param[in] Version Version(s) to set.\r | |
| 152 | @param[in] Handle Handle of the table.\r | |
| 153 | **/\r | |
| 154 | VOID\r | |
| 155 | SdtNotifyAcpiList (\r | |
| 156 | IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance,\r | |
| 157 | IN EFI_ACPI_TABLE_VERSION Version,\r | |
| 158 | IN UINTN Handle\r | |
| 159 | )\r | |
| 160 | {\r | |
| 161 | EFI_ACPI_NOTIFY_LIST *CurrentNotifyList;\r | |
| 162 | LIST_ENTRY *CurrentLink;\r | |
| 163 | LIST_ENTRY *StartLink;\r | |
| 164 | EFI_ACPI_TABLE_LIST *Table;\r | |
| 165 | EFI_STATUS Status;\r | |
| 166 | \r | |
| 167 | //\r | |
| 168 | // We should not use Table buffer, because it is user input buffer.\r | |
| 169 | //\r | |
| 170 | Status = FindTableByHandle (\r | |
| 171 | Handle,\r | |
| 172 | &AcpiTableInstance->TableList,\r | |
| 173 | &Table\r | |
| 174 | );\r | |
| 175 | ASSERT_EFI_ERROR (Status);\r | |
| 176 | \r | |
| 177 | //\r | |
| 178 | // Find the notify\r | |
| 179 | //\r | |
| 180 | StartLink = &AcpiTableInstance->NotifyList;\r | |
| 181 | CurrentLink = StartLink->ForwardLink;\r | |
| 182 | \r | |
| 183 | while (CurrentLink != StartLink) {\r | |
| 184 | CurrentNotifyList = EFI_ACPI_NOTIFY_LIST_FROM_LINK (CurrentLink);\r | |
| 185 | \r | |
| 186 | //\r | |
| 187 | // Inovke notification\r | |
| 188 | //\r | |
| 189 | CurrentNotifyList->Notification ((EFI_ACPI_SDT_HEADER *)Table->Table, Version, Handle);\r | |
| 190 | \r | |
| 191 | CurrentLink = CurrentLink->ForwardLink;\r | |
| 192 | }\r | |
| 193 | \r | |
| 194 | return ;\r | |
| 195 | }\r | |
| 196 | \r | |
| 197 | /**\r | |
| 198 | Returns a requested ACPI table.\r | |
| 199 | \r | |
| 200 | The GetAcpiTable() function returns a pointer to a buffer containing the ACPI table associated\r | |
| 201 | with the Index that was input. The following structures are not considered elements in the list of\r | |
| 202 | ACPI tables:\r | |
| 203 | - Root System Description Pointer (RSD_PTR)\r | |
| 204 | - Root System Description Table (RSDT)\r | |
| 205 | - Extended System Description Table (XSDT)\r | |
| 206 | Version is updated with a bit map containing all the versions of ACPI of which the table is a\r | |
| 207 | member.\r | |
| 208 | \r | |
| 209 | @param[in] Index The zero-based index of the table to retrieve.\r | |
| 210 | @param[out] Table Pointer for returning the table buffer.\r | |
| 211 | @param[out] Version On return, updated with the ACPI versions to which this table belongs. Type\r | |
| 212 | EFI_ACPI_TABLE_VERSION is defined in "Related Definitions" in the\r | |
| 213 | EFI_ACPI_SDT_PROTOCOL. \r | |
| 214 | @param[out] TableKey On return, points to the table key for the specified ACPI system definition table. This\r | |
| 215 | is identical to the table key used in the EFI_ACPI_TABLE_PROTOCOL. \r | |
| 216 | \r | |
| 217 | @retval EFI_SUCCESS The function completed successfully.\r | |
| 218 | @retval EFI_NOT_FOUND The requested index is too large and a table was not found. \r | |
| 219 | **/ \r | |
| 220 | EFI_STATUS\r | |
| 221 | EFIAPI\r | |
| 222 | GetAcpiTable2 (\r | |
| 223 | IN UINTN Index,\r | |
| 224 | OUT EFI_ACPI_SDT_HEADER **Table,\r | |
| 225 | OUT EFI_ACPI_TABLE_VERSION *Version,\r | |
| 226 | OUT UINTN *TableKey\r | |
| 227 | )\r | |
| 228 | {\r | |
| 229 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
| 230 | UINTN TableIndex;\r | |
| 231 | LIST_ENTRY *CurrentLink;\r | |
| 232 | LIST_ENTRY *StartLink;\r | |
| 233 | EFI_ACPI_TABLE_LIST *CurrentTable;\r | |
| 234 | \r | |
| 235 | ASSERT (Table != NULL);\r | |
| 236 | ASSERT (Version != NULL);\r | |
| 237 | ASSERT (TableKey != NULL);\r | |
| 238 | \r | |
| 239 | //\r | |
| 240 | // Get the instance of the ACPI Table\r | |
| 241 | //\r | |
| 242 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
| 243 | \r | |
| 244 | //\r | |
| 245 | // Find the table\r | |
| 246 | //\r | |
| 247 | StartLink = &AcpiTableInstance->TableList;\r | |
| 248 | CurrentLink = StartLink->ForwardLink;\r | |
| 249 | TableIndex = 0;\r | |
| 250 | \r | |
| 251 | while (CurrentLink != StartLink) {\r | |
| 252 | if (TableIndex == Index) {\r | |
| 253 | break;\r | |
| 254 | }\r | |
| 255 | //\r | |
| 256 | // Next one\r | |
| 257 | //\r | |
| 258 | CurrentLink = CurrentLink->ForwardLink;\r | |
| 259 | TableIndex ++;\r | |
| 260 | }\r | |
| 261 | \r | |
| 262 | if ((TableIndex != Index) || (CurrentLink == StartLink)) {\r | |
| 263 | return EFI_NOT_FOUND;\r | |
| 264 | }\r | |
| 265 | \r | |
| 266 | //\r | |
| 267 | // Get handle and version\r | |
| 268 | //\r | |
| 269 | CurrentTable = EFI_ACPI_TABLE_LIST_FROM_LINK (CurrentLink);\r | |
| 270 | *TableKey = CurrentTable->Handle;\r | |
| 271 | *Version = CurrentTable->Version;\r | |
| 272 | *Table = (EFI_ACPI_SDT_HEADER *)CurrentTable->Table;\r | |
| 273 | \r | |
| 274 | return EFI_SUCCESS;\r | |
| 275 | }\r | |
| 276 | \r | |
| 277 | /**\r | |
| 278 | Register a callback when an ACPI table is installed.\r | |
| 279 | \r | |
| 280 | This function registers a function which will be called whenever a new ACPI table is installed.\r | |
| 281 | \r | |
| 282 | @param[in] Notification Points to the callback function to be registered\r | |
| 283 | **/\r | |
| 284 | VOID\r | |
| 285 | SdtRegisterNotify (\r | |
| 286 | IN EFI_ACPI_NOTIFICATION_FN Notification\r | |
| 287 | )\r | |
| 288 | {\r | |
| 289 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
| 290 | EFI_ACPI_NOTIFY_LIST *CurrentNotifyList;\r | |
| 291 | \r | |
| 292 | //\r | |
| 293 | // Get the instance of the ACPI Table\r | |
| 294 | //\r | |
| 295 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
| 296 | \r | |
| 297 | //\r | |
| 298 | // Create a new list entry\r | |
| 299 | //\r | |
| 300 | CurrentNotifyList = AllocatePool (sizeof (EFI_ACPI_NOTIFY_LIST));\r | |
| 301 | ASSERT (CurrentNotifyList != NULL);\r | |
| 302 | \r | |
| 303 | //\r | |
| 304 | // Initialize the table contents\r | |
| 305 | //\r | |
| 306 | CurrentNotifyList->Signature = EFI_ACPI_NOTIFY_LIST_SIGNATURE;\r | |
| 307 | CurrentNotifyList->Notification = Notification;\r | |
| 308 | \r | |
| 309 | //\r | |
| 310 | // Add the table to the current list of tables\r | |
| 311 | //\r | |
| 312 | InsertTailList (&AcpiTableInstance->NotifyList, &CurrentNotifyList->Link);\r | |
| 313 | \r | |
| 314 | return ;\r | |
| 315 | }\r | |
| 316 | \r | |
| 317 | /**\r | |
| 318 | Unregister a callback when an ACPI table is installed.\r | |
| 319 | \r | |
| 320 | This function unregisters a function which will be called whenever a new ACPI table is installed.\r | |
| 321 | \r | |
| 322 | @param[in] Notification Points to the callback function to be unregistered.\r | |
| 323 | \r | |
| 324 | @retval EFI_SUCCESS Callback successfully unregistered.\r | |
| 325 | @retval EFI_INVALID_PARAMETER Notification does not match a known registration function. \r | |
| 326 | **/\r | |
| 327 | EFI_STATUS\r | |
| 328 | SdtUnregisterNotify (\r | |
| 329 | IN EFI_ACPI_NOTIFICATION_FN Notification\r | |
| 330 | )\r | |
| 331 | {\r | |
| 332 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
| 333 | EFI_ACPI_NOTIFY_LIST *CurrentNotifyList;\r | |
| 334 | LIST_ENTRY *CurrentLink;\r | |
| 335 | LIST_ENTRY *StartLink;\r | |
| 336 | \r | |
| 337 | //\r | |
| 338 | // Get the instance of the ACPI Table\r | |
| 339 | //\r | |
| 340 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
| 341 | \r | |
| 342 | //\r | |
| 343 | // Find the notify\r | |
| 344 | //\r | |
| 345 | StartLink = &AcpiTableInstance->NotifyList;\r | |
| 346 | CurrentLink = StartLink->ForwardLink;\r | |
| 347 | \r | |
| 348 | while (CurrentLink != StartLink) {\r | |
| 349 | CurrentNotifyList = EFI_ACPI_NOTIFY_LIST_FROM_LINK (CurrentLink);\r | |
| 350 | if (CurrentNotifyList->Notification == Notification) {\r | |
| 351 | //\r | |
| 352 | // Good! Found notification.\r | |
| 353 | //\r | |
| 354 | // Remove it from list and free the node.\r | |
| 355 | //\r | |
| 356 | RemoveEntryList (&(CurrentNotifyList->Link));\r | |
| 357 | FreePool (CurrentNotifyList);\r | |
| 358 | return EFI_SUCCESS;\r | |
| 359 | }\r | |
| 360 | \r | |
| 361 | CurrentLink = CurrentLink->ForwardLink;\r | |
| 362 | }\r | |
| 363 | \r | |
| 364 | //\r | |
| 365 | // Not found!\r | |
| 366 | //\r | |
| 367 | return EFI_INVALID_PARAMETER;\r | |
| 368 | }\r | |
| 369 | \r | |
| 370 | /**\r | |
| 371 | Register or unregister a callback when an ACPI table is installed.\r | |
| 372 | \r | |
| 373 | This function registers or unregisters a function which will be called whenever a new ACPI table is\r | |
| 374 | installed.\r | |
| 375 | \r | |
| 376 | @param[in] Register If TRUE, then the specified function will be registered. If FALSE, then the specified\r | |
| 377 | function will be unregistered.\r | |
| 378 | @param[in] Notification Points to the callback function to be registered or unregistered.\r | |
| 379 | \r | |
| 380 | @retval EFI_SUCCESS Callback successfully registered or unregistered.\r | |
| 381 | @retval EFI_INVALID_PARAMETER Notification is NULL\r | |
| 382 | @retval EFI_INVALID_PARAMETER Register is FALSE and Notification does not match a known registration function. \r | |
| 383 | **/\r | |
| 384 | EFI_STATUS\r | |
| 385 | EFIAPI\r | |
| 386 | RegisterNotify (\r | |
| 387 | IN BOOLEAN Register,\r | |
| 388 | IN EFI_ACPI_NOTIFICATION_FN Notification\r | |
| 389 | )\r | |
| 390 | {\r | |
| 391 | //\r | |
| 392 | // Check for invalid input parameters\r | |
| 393 | //\r | |
| 394 | if (Notification == NULL) {\r | |
| 395 | return EFI_INVALID_PARAMETER;\r | |
| 396 | }\r | |
| 397 | \r | |
| 398 | if (Register) {\r | |
| 399 | //\r | |
| 400 | // Register a new notify\r | |
| 401 | //\r | |
| 402 | SdtRegisterNotify (Notification);\r | |
| 403 | return EFI_SUCCESS;\r | |
| 404 | } else {\r | |
| 405 | //\r | |
| 406 | // Unregister an old notify\r | |
| 407 | //\r | |
| 408 | return SdtUnregisterNotify (Notification);\r | |
| 409 | }\r | |
| 410 | }\r | |
| 411 | \r | |
| 412 | /**\r | |
| 413 | Create a handle for the first ACPI opcode in an ACPI system description table.\r | |
| 414 | \r | |
| 415 | @param[in] TableKey The table key for the ACPI table, as returned by GetTable().\r | |
| 416 | @param[out] Handle On return, points to the newly created ACPI handle.\r | |
| 417 | \r | |
| 418 | @retval EFI_SUCCESS Handle created successfully.\r | |
| 419 | @retval EFI_NOT_FOUND TableKey does not refer to a valid ACPI table. \r | |
| 420 | **/\r | |
| 421 | EFI_STATUS\r | |
| 422 | SdtOpenSdtTable (\r | |
| 423 | IN UINTN TableKey,\r | |
| 424 | OUT EFI_ACPI_HANDLE *Handle\r | |
| 425 | )\r | |
| 426 | {\r | |
| 427 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
| 428 | EFI_STATUS Status;\r | |
| 429 | EFI_ACPI_TABLE_LIST *Table;\r | |
| 430 | EFI_AML_HANDLE *AmlHandle;\r | |
| 431 | \r | |
| 432 | //\r | |
| 433 | // Get the instance of the ACPI Table\r | |
| 434 | //\r | |
| 435 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
| 436 | \r | |
| 437 | //\r | |
| 438 | // Find the table\r | |
| 439 | //\r | |
| 440 | Status = FindTableByHandle (\r | |
| 441 | TableKey,\r | |
| 442 | &AcpiTableInstance->TableList,\r | |
| 443 | &Table\r | |
| 444 | );\r | |
| 445 | if (EFI_ERROR (Status)) {\r | |
| 446 | return EFI_NOT_FOUND;\r | |
| 447 | }\r | |
| 448 | \r | |
| 449 | AmlHandle = AllocatePool (sizeof(*AmlHandle));\r | |
| 450 | ASSERT (AmlHandle != NULL);\r | |
| 451 | AmlHandle->Signature = EFI_AML_ROOT_HANDLE_SIGNATURE;\r | |
| 452 | AmlHandle->Buffer = (VOID *)((UINTN)Table->Table + sizeof(EFI_ACPI_SDT_HEADER));\r | |
| 453 | AmlHandle->Size = Table->Table->Length - sizeof(EFI_ACPI_SDT_HEADER);\r | |
| 454 | AmlHandle->AmlByteEncoding = NULL;\r | |
| 455 | AmlHandle->Modified = FALSE;\r | |
| 456 | \r | |
| 457 | //\r | |
| 458 | // return the ACPI handle\r | |
| 459 | //\r | |
| 460 | *Handle = (EFI_ACPI_HANDLE)AmlHandle;\r | |
| 461 | \r | |
| 462 | return EFI_SUCCESS;\r | |
| 463 | }\r | |
| 464 | \r | |
| 465 | /**\r | |
| 466 | Create a handle for the first ACPI opcode in an ACPI system description table.\r | |
| 467 | \r | |
| 468 | @param[in] TableKey The table key for the ACPI table, as returned by GetTable().\r | |
| 469 | @param[out] Handle On return, points to the newly created ACPI handle.\r | |
| 470 | \r | |
| 471 | @retval EFI_SUCCESS Handle created successfully.\r | |
| 472 | @retval EFI_NOT_FOUND TableKey does not refer to a valid ACPI table. \r | |
| 473 | **/\r | |
| 474 | EFI_STATUS\r | |
| 475 | EFIAPI\r | |
| 476 | OpenSdt (\r | |
| 477 | IN UINTN TableKey,\r | |
| 478 | OUT EFI_ACPI_HANDLE *Handle\r | |
| 479 | )\r | |
| 480 | {\r | |
| 481 | if (Handle == NULL) {\r | |
| 482 | return EFI_INVALID_PARAMETER;\r | |
| 483 | }\r | |
| 484 | \r | |
| 485 | return SdtOpenSdtTable (TableKey, Handle);\r | |
| 486 | }\r | |
| 487 | \r | |
| 488 | /**\r | |
| 489 | Create a handle from an ACPI opcode\r | |
| 490 | \r | |
| 491 | @param[in] Buffer Points to the ACPI opcode.\r | |
| 492 | @param[in] BufferSize Max buffer size.\r | |
| 493 | @param[out] Handle Upon return, holds the handle.\r | |
| 494 | \r | |
| 495 | @retval EFI_SUCCESS Success\r | |
| 496 | @retval EFI_INVALID_PARAMETER Buffer is NULL or Handle is NULL or Buffer points to an\r | |
| 497 | invalid opcode.\r | |
| 498 | \r | |
| 499 | **/\r | |
| 500 | EFI_STATUS\r | |
| 501 | SdtOpenEx (\r | |
| 502 | IN VOID *Buffer,\r | |
| 503 | IN UINTN BufferSize,\r | |
| 504 | OUT EFI_ACPI_HANDLE *Handle \r | |
| 505 | )\r | |
| 506 | {\r | |
| 507 | AML_BYTE_ENCODING *AmlByteEncoding;\r | |
| 508 | EFI_AML_HANDLE *AmlHandle;\r | |
| 509 | \r | |
| 510 | AmlByteEncoding = AmlSearchByOpByte (Buffer);\r | |
| 511 | if (AmlByteEncoding == NULL) {\r | |
| 512 | return EFI_INVALID_PARAMETER;\r | |
| 513 | }\r | |
| 514 | \r | |
| 515 | //\r | |
| 516 | // Do not open NameString as handle\r | |
| 517 | //\r | |
| 518 | if ((AmlByteEncoding->Attribute & AML_IS_NAME_CHAR) != 0) {\r | |
| 519 | return EFI_INVALID_PARAMETER;\r | |
| 520 | }\r | |
| 521 | \r | |
| 522 | //\r | |
| 523 | // Good, find it\r | |
| 524 | //\r | |
| 525 | AmlHandle = AllocatePool (sizeof(*AmlHandle));\r | |
| 526 | ASSERT (AmlHandle != NULL);\r | |
| 527 | \r | |
| 528 | AmlHandle->Signature = EFI_AML_HANDLE_SIGNATURE;\r | |
| 529 | AmlHandle->Buffer = Buffer;\r | |
| 530 | AmlHandle->AmlByteEncoding = AmlByteEncoding;\r | |
| 531 | AmlHandle->Modified = FALSE;\r | |
| 532 | \r | |
| 533 | AmlHandle->Size = AmlGetObjectSize (AmlByteEncoding, Buffer, BufferSize);\r | |
| 534 | if (AmlHandle->Size == 0) {\r | |
| 535 | FreePool (AmlHandle);\r | |
| 536 | return EFI_INVALID_PARAMETER;\r | |
| 537 | }\r | |
| 538 | \r | |
| 539 | *Handle = (EFI_ACPI_HANDLE)AmlHandle;\r | |
| 540 | \r | |
| 541 | return EFI_SUCCESS;\r | |
| 542 | }\r | |
| 543 | \r | |
| 544 | /**\r | |
| 545 | Create a handle from an ACPI opcode\r | |
| 546 | \r | |
| 547 | @param[in] Buffer Points to the ACPI opcode.\r | |
| 548 | @param[out] Handle Upon return, holds the handle.\r | |
| 549 | \r | |
| 550 | @retval EFI_SUCCESS Success\r | |
| 551 | @retval EFI_INVALID_PARAMETER Buffer is NULL or Handle is NULL or Buffer points to an\r | |
| 552 | invalid opcode.\r | |
| 553 | \r | |
| 554 | **/\r | |
| 555 | EFI_STATUS\r | |
| 556 | EFIAPI\r | |
| 557 | Open (\r | |
| 558 | IN VOID *Buffer,\r | |
| 559 | OUT EFI_ACPI_HANDLE *Handle \r | |
| 560 | )\r | |
| 561 | {\r | |
| 562 | EFI_STATUS Status;\r | |
| 563 | UINTN MaxSize;\r | |
| 564 | \r | |
| 565 | //\r | |
| 566 | // Check for invalid input parameters\r | |
| 567 | //\r | |
| 568 | if (Buffer == NULL || Handle == NULL) {\r | |
| 569 | return EFI_INVALID_PARAMETER;\r | |
| 570 | }\r | |
| 571 | \r | |
| 572 | Status = SdtGetMaxAmlBufferSize (Buffer, &MaxSize);\r | |
| 573 | if (EFI_ERROR (Status)) {\r | |
| 574 | return EFI_INVALID_PARAMETER;\r | |
| 575 | }\r | |
| 576 | \r | |
| 577 | return SdtOpenEx (Buffer, MaxSize, Handle);\r | |
| 578 | }\r | |
| 579 | \r | |
| 580 | /**\r | |
| 581 | Close an ACPI handle.\r | |
| 582 | \r | |
| 583 | @param[in] Handle Returns the handle.\r | |
| 584 | \r | |
| 585 | @retval EFI_SUCCESS Success\r | |
| 586 | @retval EFI_INVALID_PARAMETER Handle is NULL or does not refer to a valid ACPI object. \r | |
| 587 | **/\r | |
| 588 | EFI_STATUS\r | |
| 589 | EFIAPI\r | |
| 590 | Close (\r | |
| 591 | IN EFI_ACPI_HANDLE Handle\r | |
| 592 | )\r | |
| 593 | {\r | |
| 594 | EFI_AML_HANDLE *AmlHandle;\r | |
| 595 | EFI_STATUS Status;\r | |
| 596 | \r | |
| 597 | //\r | |
| 598 | // Check for invalid input parameters\r | |
| 599 | //\r | |
| 600 | if (Handle == NULL) {\r | |
| 601 | return EFI_INVALID_PARAMETER;\r | |
| 602 | }\r | |
| 603 | \r | |
| 604 | AmlHandle = (EFI_AML_HANDLE *)Handle;\r | |
| 605 | if ((AmlHandle->Signature != EFI_AML_ROOT_HANDLE_SIGNATURE) &&\r | |
| 606 | (AmlHandle->Signature != EFI_AML_HANDLE_SIGNATURE)) {\r | |
| 607 | return EFI_INVALID_PARAMETER;\r | |
| 608 | }\r | |
| 609 | \r | |
| 610 | //\r | |
| 611 | // Update Checksum only if modified\r | |
| 612 | //\r | |
| 613 | if (AmlHandle->Modified) {\r | |
| 614 | Status = SdtUpdateAmlChecksum (AmlHandle->Buffer);\r | |
| 615 | if (EFI_ERROR (Status)) {\r | |
| 616 | return EFI_INVALID_PARAMETER;\r | |
| 617 | }\r | |
| 618 | }\r | |
| 619 | \r | |
| 620 | FreePool (AmlHandle);\r | |
| 621 | \r | |
| 622 | return EFI_SUCCESS;\r | |
| 623 | }\r | |
| 624 | \r | |
| 625 | /**\r | |
| 626 | Retrieve information about an ACPI object.\r | |
| 627 | \r | |
| 628 | @param[in] Handle ACPI object handle.\r | |
| 629 | @param[in] Index Index of the data to retrieve from the object. In general, indexes read from left-to-right\r | |
| 630 | in the ACPI encoding, with index 0 always being the ACPI opcode.\r | |
| 631 | @param[out] DataType Points to the returned data type or EFI_ACPI_DATA_TYPE_NONE if no data exists\r | |
| 632 | for the specified index.\r | |
| 633 | @param[out] Data Upon return, points to the pointer to the data.\r | |
| 634 | @param[out] DataSize Upon return, points to the size of Data.\r | |
| 635 | \r | |
| 636 | @retval EFI_SUCCESS Success.\r | |
| 637 | @retval EFI_INVALID_PARAMETER Handle is NULL or does not refer to a valid ACPI object.\r | |
| 638 | **/\r | |
| 639 | EFI_STATUS\r | |
| 640 | EFIAPI\r | |
| 641 | GetOption (\r | |
| 642 | IN EFI_ACPI_HANDLE Handle,\r | |
| 643 | IN UINTN Index,\r | |
| 644 | OUT EFI_ACPI_DATA_TYPE *DataType,\r | |
| 645 | OUT CONST VOID **Data,\r | |
| 646 | OUT UINTN *DataSize\r | |
| 647 | )\r | |
| 648 | {\r | |
| 649 | EFI_AML_HANDLE *AmlHandle;\r | |
| 650 | AML_BYTE_ENCODING *AmlByteEncoding;\r | |
| 651 | EFI_STATUS Status;\r | |
| 652 | \r | |
| 653 | ASSERT (DataType != NULL);\r | |
| 654 | ASSERT (Data != NULL);\r | |
| 655 | ASSERT (DataSize != NULL);\r | |
| 656 | \r | |
| 657 | //\r | |
| 658 | // Check for invalid input parameters\r | |
| 659 | //\r | |
| 660 | if (Handle == NULL) {\r | |
| 661 | return EFI_INVALID_PARAMETER;\r | |
| 662 | }\r | |
| 663 | \r | |
| 664 | AmlHandle = (EFI_AML_HANDLE *)Handle;\r | |
| 665 | //\r | |
| 666 | // Do not check EFI_AML_ROOT_HANDLE_SIGNATURE because there is no option for Root handle\r | |
| 667 | //\r | |
| 668 | if (AmlHandle->Signature != EFI_AML_HANDLE_SIGNATURE) {\r | |
| 669 | return EFI_INVALID_PARAMETER;\r | |
| 670 | }\r | |
| 671 | \r | |
| 672 | AmlByteEncoding = AmlHandle->AmlByteEncoding;\r | |
| 673 | if (Index > AmlByteEncoding->MaxIndex) {\r | |
| 674 | *DataType = EFI_ACPI_DATA_TYPE_NONE;\r | |
| 675 | return EFI_SUCCESS;\r | |
| 676 | }\r | |
| 677 | \r | |
| 678 | //\r | |
| 679 | // Parse option\r | |
| 680 | //\r | |
| 681 | Status = AmlParseOptionHandleCommon (AmlHandle, (AML_OP_PARSE_INDEX)Index, DataType, (VOID **)Data, DataSize);\r | |
| 682 | if (EFI_ERROR (Status)) {\r | |
| 683 | return EFI_INVALID_PARAMETER;\r | |
| 684 | }\r | |
| 685 | \r | |
| 686 | return EFI_SUCCESS;\r | |
| 687 | }\r | |
| 688 | \r | |
| 689 | /**\r | |
| 690 | Change information about an ACPI object.\r | |
| 691 | \r | |
| 692 | @param[in] Handle ACPI object handle.\r | |
| 693 | @param[in] Index Index of the data to retrieve from the object. In general, indexes read from left-to-right\r | |
| 694 | in the ACPI encoding, with index 0 always being the ACPI opcode.\r | |
| 695 | @param[in] Data Points to the data.\r | |
| 696 | @param[in] DataSize The size of the Data.\r | |
| 697 | \r | |
| 698 | @retval EFI_SUCCESS Success\r | |
| 699 | @retval EFI_INVALID_PARAMETER Handle is NULL or does not refer to a valid ACPI object.\r | |
| 700 | @retval EFI_BAD_BUFFER_SIZE Data cannot be accommodated in the space occupied by\r | |
| 701 | the option.\r | |
| 702 | \r | |
| 703 | **/\r | |
| 704 | EFI_STATUS\r | |
| 705 | EFIAPI\r | |
| 706 | SetOption (\r | |
| 707 | IN EFI_ACPI_HANDLE Handle,\r | |
| 708 | IN UINTN Index,\r | |
| 709 | IN CONST VOID *Data,\r | |
| 710 | IN UINTN DataSize\r | |
| 711 | )\r | |
| 712 | {\r | |
| 713 | EFI_AML_HANDLE *AmlHandle;\r | |
| 714 | AML_BYTE_ENCODING *AmlByteEncoding;\r | |
| 715 | EFI_STATUS Status;\r | |
| 716 | EFI_ACPI_DATA_TYPE DataType;\r | |
| 717 | VOID *OrgData;\r | |
| 718 | UINTN OrgDataSize;\r | |
| 719 | \r | |
| 720 | ASSERT (Data != NULL);\r | |
| 721 | \r | |
| 722 | //\r | |
| 723 | // Check for invalid input parameters\r | |
| 724 | //\r | |
| 725 | if (Handle == NULL) {\r | |
| 726 | return EFI_INVALID_PARAMETER;\r | |
| 727 | }\r | |
| 728 | \r | |
| 729 | AmlHandle = (EFI_AML_HANDLE *)Handle;\r | |
| 730 | //\r | |
| 731 | // Do not check EFI_AML_ROOT_HANDLE_SIGNATURE because there is no option for Root handle\r | |
| 732 | //\r | |
| 733 | if (AmlHandle->Signature != EFI_AML_HANDLE_SIGNATURE) {\r | |
| 734 | return EFI_INVALID_PARAMETER;\r | |
| 735 | }\r | |
| 736 | AmlByteEncoding = AmlHandle->AmlByteEncoding;\r | |
| 737 | \r | |
| 738 | if (Index > AmlByteEncoding->MaxIndex) {\r | |
| 739 | return EFI_INVALID_PARAMETER;\r | |
| 740 | }\r | |
| 741 | \r | |
| 742 | //\r | |
| 743 | // Parse option\r | |
| 744 | //\r | |
| 745 | Status = AmlParseOptionHandleCommon (AmlHandle, (AML_OP_PARSE_INDEX)Index, &DataType, &OrgData, &OrgDataSize);\r | |
| 746 | if (EFI_ERROR (Status)) {\r | |
| 747 | return EFI_INVALID_PARAMETER;\r | |
| 748 | }\r | |
| 749 | if (DataType == EFI_ACPI_DATA_TYPE_NONE) {\r | |
| 750 | return EFI_INVALID_PARAMETER;\r | |
| 751 | }\r | |
| 752 | \r | |
| 753 | if (DataSize > OrgDataSize) {\r | |
| 754 | return EFI_BAD_BUFFER_SIZE;\r | |
| 755 | }\r | |
| 756 | \r | |
| 757 | //\r | |
| 758 | // Update\r | |
| 759 | //\r | |
| 760 | CopyMem (OrgData, Data, DataSize);\r | |
| 761 | AmlHandle->Modified = TRUE;\r | |
| 762 | \r | |
| 763 | return EFI_SUCCESS;\r | |
| 764 | }\r | |
| 765 | \r | |
| 766 | /**\r | |
| 767 | Return the child ACPI objects.\r | |
| 768 | \r | |
| 769 | @param[in] ParentHandle Parent handle.\r | |
| 770 | @param[in, out] Handle On entry, points to the previously returned handle or NULL to start with the first\r | |
| 771 | handle. On return, points to the next returned ACPI handle or NULL if there are no\r | |
| 772 | child objects.\r | |
| 773 | \r | |
| 774 | @retval EFI_SUCCESS Success\r | |
| 775 | @retval EFI_INVALID_PARAMETER ParentHandle is NULL or does not refer to a valid ACPI object. \r | |
| 776 | **/\r | |
| 777 | EFI_STATUS\r | |
| 778 | EFIAPI\r | |
| 779 | GetChild (\r | |
| 780 | IN EFI_ACPI_HANDLE ParentHandle,\r | |
| 781 | IN OUT EFI_ACPI_HANDLE *Handle\r | |
| 782 | )\r | |
| 783 | {\r | |
| 784 | EFI_AML_HANDLE *AmlParentHandle;\r | |
| 785 | EFI_AML_HANDLE *AmlHandle;\r | |
| 786 | VOID *Buffer;\r | |
| 787 | EFI_STATUS Status;\r | |
| 788 | \r | |
| 789 | ASSERT (Handle != NULL);\r | |
| 790 | \r | |
| 791 | //\r | |
| 792 | // Check for invalid input parameters\r | |
| 793 | //\r | |
| 794 | if (ParentHandle == NULL) {\r | |
| 795 | return EFI_INVALID_PARAMETER;\r | |
| 796 | }\r | |
| 797 | \r | |
| 798 | AmlHandle = *Handle;\r | |
| 799 | if ((AmlHandle != NULL) && (AmlHandle->Signature != EFI_AML_HANDLE_SIGNATURE)) {\r | |
| 800 | return EFI_INVALID_PARAMETER;\r | |
| 801 | }\r | |
| 802 | \r | |
| 803 | AmlParentHandle = (EFI_AML_HANDLE *)ParentHandle;\r | |
| 804 | if (AmlParentHandle->Signature == EFI_AML_ROOT_HANDLE_SIGNATURE) {\r | |
| 805 | //\r | |
| 806 | // Root handle\r | |
| 807 | //\r | |
| 808 | Status = AmlGetChildFromRoot (AmlParentHandle, AmlHandle, &Buffer);\r | |
| 809 | } else if (AmlParentHandle->Signature == EFI_AML_HANDLE_SIGNATURE) {\r | |
| 810 | //\r | |
| 811 | // Non-root handle\r | |
| 812 | //\r | |
| 813 | Status = AmlGetChildFromNonRoot (AmlParentHandle, AmlHandle, &Buffer);\r | |
| 814 | } else {\r | |
| 815 | //\r | |
| 816 | // Invalid\r | |
| 817 | //\r | |
| 818 | return EFI_INVALID_PARAMETER;\r | |
| 819 | }\r | |
| 820 | \r | |
| 821 | if (EFI_ERROR (Status)) {\r | |
| 822 | return EFI_INVALID_PARAMETER;\r | |
| 823 | }\r | |
| 824 | if (Buffer == NULL) {\r | |
| 825 | *Handle = NULL;\r | |
| 826 | return EFI_SUCCESS;\r | |
| 827 | }\r | |
| 828 | return SdtOpenEx (Buffer, (UINTN)AmlParentHandle->Buffer + AmlParentHandle->Size - (UINTN)Buffer, Handle);\r | |
| 829 | }\r | |
| 830 | \r | |
| 831 | /**\r | |
| 832 | Returns the handle of the ACPI object representing the specified ACPI path\r | |
| 833 | \r | |
| 834 | @param[in] HandleIn Points to the handle of the object representing the starting point for the path search.\r | |
| 835 | @param[in] AmlPath Points to the AML path.\r | |
| 836 | @param[out] HandleOut On return, points to the ACPI object which represents AcpiPath, relative to\r | |
| 837 | HandleIn.\r | |
| 838 | \r | |
| 839 | @retval EFI_SUCCESS Success\r | |
| 840 | @retval EFI_INVALID_PARAMETER HandleIn is NULL or does not refer to a valid ACPI object. \r | |
| 841 | **/\r | |
| 842 | EFI_STATUS\r | |
| 843 | SdtFindPathFromNonRoot (\r | |
| 844 | IN EFI_ACPI_HANDLE HandleIn,\r | |
| 845 | IN UINT8 *AmlPath,\r | |
| 846 | OUT EFI_ACPI_HANDLE *HandleOut\r | |
| 847 | )\r | |
| 848 | {\r | |
| 849 | EFI_AML_HANDLE *AmlHandle;\r | |
| 850 | VOID *Buffer;\r | |
| 851 | EFI_STATUS Status;\r | |
| 852 | \r | |
| 853 | AmlHandle = (EFI_AML_HANDLE *)HandleIn;\r | |
| 854 | \r | |
| 855 | //\r | |
| 856 | // For non-root handle, we need search from THIS node instead of ROOT.\r | |
| 857 | //\r | |
| 858 | Status = AmlFindPath (AmlHandle, AmlPath, &Buffer, FALSE);\r | |
| 859 | if (EFI_ERROR (Status)) {\r | |
| 860 | return EFI_INVALID_PARAMETER;\r | |
| 861 | }\r | |
| 862 | if (Buffer == NULL) {\r | |
| 863 | *HandleOut = NULL;\r | |
| 864 | return EFI_SUCCESS;\r | |
| 865 | }\r | |
| 866 | return SdtOpenEx (Buffer, (UINTN)AmlHandle->Buffer + AmlHandle->Size - (UINTN)Buffer, HandleOut);\r | |
| 867 | }\r | |
| 868 | \r | |
| 869 | /**\r | |
| 870 | Duplicate AML handle.\r | |
| 871 | \r | |
| 872 | @param[in] AmlHandle Handle to be duplicated.\r | |
| 873 | \r | |
| 874 | @return Duplicated AML handle.\r | |
| 875 | **/\r | |
| 876 | EFI_AML_HANDLE *\r | |
| 877 | SdtDuplicateHandle (\r | |
| 878 | IN EFI_AML_HANDLE *AmlHandle\r | |
| 879 | )\r | |
| 880 | {\r | |
| 881 | EFI_AML_HANDLE *DstAmlHandle;\r | |
| 882 | \r | |
| 883 | DstAmlHandle = AllocatePool (sizeof(*DstAmlHandle));\r | |
| 884 | ASSERT (DstAmlHandle != NULL);\r | |
| 885 | CopyMem (DstAmlHandle, (VOID *)AmlHandle, sizeof(*DstAmlHandle));\r | |
| 886 | \r | |
| 887 | return DstAmlHandle;\r | |
| 888 | }\r | |
| 889 | \r | |
| 890 | /**\r | |
| 891 | Returns the handle of the ACPI object representing the specified ACPI path\r | |
| 892 | \r | |
| 893 | @param[in] HandleIn Points to the handle of the object representing the starting point for the path search.\r | |
| 894 | @param[in] AmlPath Points to the AML path.\r | |
| 895 | @param[out] HandleOut On return, points to the ACPI object which represents AcpiPath, relative to\r | |
| 896 | HandleIn.\r | |
| 897 | \r | |
| 898 | @retval EFI_SUCCESS Success\r | |
| 899 | @retval EFI_INVALID_PARAMETER HandleIn is NULL or does not refer to a valid ACPI object. \r | |
| 900 | **/\r | |
| 901 | EFI_STATUS\r | |
| 902 | SdtFindPathFromRoot (\r | |
| 903 | IN EFI_ACPI_HANDLE HandleIn,\r | |
| 904 | IN UINT8 *AmlPath,\r | |
| 905 | OUT EFI_ACPI_HANDLE *HandleOut\r | |
| 906 | )\r | |
| 907 | {\r | |
| 908 | EFI_ACPI_HANDLE ChildHandle;\r | |
| 909 | EFI_AML_HANDLE *AmlHandle;\r | |
| 910 | EFI_STATUS Status;\r | |
| 911 | VOID *Buffer;\r | |
| 912 | \r | |
| 913 | AmlHandle = (EFI_AML_HANDLE *)HandleIn;\r | |
| 914 | \r | |
| 915 | //\r | |
| 916 | // Handle case that AcpiPath is Root\r | |
| 917 | //\r | |
| 918 | if (AmlIsRootPath (AmlPath)) {\r | |
| 919 | //\r | |
| 920 | // Duplicate RootHandle\r | |
| 921 | //\r | |
| 922 | *HandleOut = (EFI_ACPI_HANDLE)SdtDuplicateHandle (AmlHandle);\r | |
| 923 | return EFI_SUCCESS;\r | |
| 924 | }\r | |
| 925 | \r | |
| 926 | //\r | |
| 927 | // Let children find it.\r | |
| 928 | //\r | |
| 929 | ChildHandle = NULL;\r | |
| 930 | while (TRUE) {\r | |
| 931 | Status = GetChild (HandleIn, &ChildHandle);\r | |
| 932 | if (EFI_ERROR (Status)) {\r | |
| 933 | return EFI_INVALID_PARAMETER;\r | |
| 934 | }\r | |
| 935 | \r | |
| 936 | if (ChildHandle == NULL) {\r | |
| 937 | //\r | |
| 938 | // Not found\r | |
| 939 | //\r | |
| 940 | *HandleOut = NULL;\r | |
| 941 | return EFI_SUCCESS;\r | |
| 942 | }\r | |
| 943 | \r | |
| 944 | //\r | |
| 945 | // More child\r | |
| 946 | //\r | |
| 947 | AmlHandle = (EFI_AML_HANDLE *)ChildHandle;\r | |
| 948 | Status = AmlFindPath (AmlHandle, AmlPath, &Buffer, TRUE);\r | |
| 949 | if (EFI_ERROR (Status)) {\r | |
| 950 | return EFI_INVALID_PARAMETER;\r | |
| 951 | }\r | |
| 952 | \r | |
| 953 | if (Buffer != NULL) {\r | |
| 954 | //\r | |
| 955 | // Great! Find it, open\r | |
| 956 | //\r | |
| 957 | Status = SdtOpenEx (Buffer, (UINTN)AmlHandle->Buffer + AmlHandle->Size - (UINTN)Buffer, HandleOut);\r | |
| 958 | if (!EFI_ERROR (Status)) {\r | |
| 959 | return EFI_SUCCESS;\r | |
| 960 | }\r | |
| 961 | //\r | |
| 962 | // Not success, try next one\r | |
| 963 | //\r | |
| 964 | }\r | |
| 965 | }\r | |
| 966 | \r | |
| 967 | //\r | |
| 968 | // Should not run here\r | |
| 969 | //\r | |
| 970 | }\r | |
| 971 | \r | |
| 972 | /**\r | |
| 973 | Returns the handle of the ACPI object representing the specified ACPI path\r | |
| 974 | \r | |
| 975 | @param[in] HandleIn Points to the handle of the object representing the starting point for the path search.\r | |
| 976 | @param[in] AcpiPath Points to the ACPI path, which conforms to the ACPI encoded path format.\r | |
| 977 | @param[out] HandleOut On return, points to the ACPI object which represents AcpiPath, relative to\r | |
| 978 | HandleIn.\r | |
| 979 | \r | |
| 980 | @retval EFI_SUCCESS Success\r | |
| 981 | @retval EFI_INVALID_PARAMETER HandleIn is NULL or does not refer to a valid ACPI object. \r | |
| 982 | **/\r | |
| 983 | EFI_STATUS\r | |
| 984 | EFIAPI\r | |
| 985 | FindPath (\r | |
| 986 | IN EFI_ACPI_HANDLE HandleIn,\r | |
| 987 | IN VOID *AcpiPath,\r | |
| 988 | OUT EFI_ACPI_HANDLE *HandleOut\r | |
| 989 | )\r | |
| 990 | {\r | |
| 991 | EFI_AML_HANDLE *AmlHandle;\r | |
| 992 | EFI_STATUS Status;\r | |
| 993 | UINT8 *AmlPath;\r | |
| 994 | \r | |
| 995 | //\r | |
| 996 | // Check for invalid input parameters\r | |
| 997 | //\r | |
| 998 | if (HandleIn == NULL) {\r | |
| 999 | return EFI_INVALID_PARAMETER;\r | |
| 1000 | }\r | |
| 1001 | \r | |
| 1002 | AmlHandle = (EFI_AML_HANDLE *)HandleIn;\r | |
| 1003 | \r | |
| 1004 | //\r | |
| 1005 | // Convert ASL path to AML path\r | |
| 1006 | //\r | |
| 1007 | AmlPath = AmlNameFromAslName (AcpiPath);\r | |
| 1008 | if (AmlPath == NULL) {\r | |
| 1009 | return EFI_INVALID_PARAMETER;\r | |
| 1010 | }\r | |
| 1011 | \r | |
| 1012 | DEBUG_CODE_BEGIN ();\r | |
| 1013 | DEBUG ((EFI_D_ERROR, "AcpiSdt: FindPath - "));\r | |
| 1014 | AmlPrintNameString (AmlPath);\r | |
| 1015 | DEBUG ((EFI_D_ERROR, "\n"));\r | |
| 1016 | DEBUG_CODE_END ();\r | |
| 1017 | \r | |
| 1018 | if (AmlHandle->Signature == EFI_AML_ROOT_HANDLE_SIGNATURE) {\r | |
| 1019 | //\r | |
| 1020 | // Root Handle\r | |
| 1021 | //\r | |
| 1022 | Status = SdtFindPathFromRoot (HandleIn, AmlPath, HandleOut);\r | |
| 1023 | } else if (AmlHandle->Signature == EFI_AML_HANDLE_SIGNATURE) {\r | |
| 1024 | //\r | |
| 1025 | // Non-Root handle\r | |
| 1026 | //\r | |
| 1027 | Status = SdtFindPathFromNonRoot (HandleIn, AmlPath, HandleOut);\r | |
| 1028 | } else {\r | |
| 1029 | Status = EFI_INVALID_PARAMETER;\r | |
| 1030 | }\r | |
| 1031 | \r | |
| 1032 | FreePool (AmlPath);\r | |
| 1033 | \r | |
| 1034 | return Status;\r | |
| 1035 | }\r | |
| 1036 | \r | |
| 1037 | /**\r | |
| 1038 | ExitPmAuth Protocol notification event handler.\r | |
| 1039 | \r | |
| 1040 | @param[in] Event Event whose notification function is being invoked.\r | |
| 1041 | @param[in] Context Pointer to the notification function's context.\r | |
| 1042 | **/\r | |
| 1043 | VOID\r | |
| 1044 | EFIAPI\r | |
| 1045 | ExitPmAuthNotification (\r | |
| 1046 | IN EFI_EVENT Event,\r | |
| 1047 | IN VOID *Context\r | |
| 1048 | )\r | |
| 1049 | {\r | |
| 1050 | EFI_STATUS Status;\r | |
| 1051 | VOID *DxeSmmReadyToLock;\r | |
| 1052 | \r | |
| 1053 | //\r | |
| 1054 | // Add more check to locate protocol after got event, because\r | |
| 1055 | // the library will signal this event immediately once it is register\r | |
| 1056 | // just in case it is already installed.\r | |
| 1057 | //\r | |
| 1058 | Status = gBS->LocateProtocol (\r | |
| 1059 | &gEfiDxeSmmReadyToLockProtocolGuid,\r | |
| 1060 | NULL,\r | |
| 1061 | &DxeSmmReadyToLock\r | |
| 1062 | );\r | |
| 1063 | if (EFI_ERROR (Status)) {\r | |
| 1064 | return ;\r | |
| 1065 | }\r | |
| 1066 | \r | |
| 1067 | //\r | |
| 1068 | // Uninstall ACPI SDT protocol, so that we can make sure no one update ACPI table from API level.\r | |
| 1069 | //\r | |
| 1070 | Status = gBS->UninstallProtocolInterface (\r | |
| 1071 | mHandle,\r | |
| 1072 | &gEfiAcpiSdtProtocolGuid,\r | |
| 1073 | &mPrivateData->AcpiSdtProtocol\r | |
| 1074 | );\r | |
| 1075 | ASSERT_EFI_ERROR (Status);\r | |
| 1076 | \r | |
| 1077 | //\r | |
| 1078 | // Close event, so it will not be invoked again.\r | |
| 1079 | //\r | |
| 1080 | gBS->CloseEvent (Event);\r | |
| 1081 | \r | |
| 1082 | return ;\r | |
| 1083 | }\r | |
| 1084 | \r | |
| 1085 | /**\r | |
| 1086 | This function initializes AcpiSdt protocol in ACPI table instance.\r | |
| 1087 | \r | |
| 1088 | @param[in] AcpiTableInstance Instance to construct\r | |
| 1089 | **/\r | |
| 1090 | VOID\r | |
| 1091 | SdtAcpiTableAcpiSdtConstructor (\r | |
| 1092 | IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance\r | |
| 1093 | )\r | |
| 1094 | {\r | |
| 1095 | VOID *Registration;\r | |
| 1096 | \r | |
| 1097 | InitializeListHead (&AcpiTableInstance->NotifyList);\r | |
| 1098 | CopyMem (&AcpiTableInstance->AcpiSdtProtocol, &mAcpiSdtProtocolTemplate, sizeof(mAcpiSdtProtocolTemplate));\r | |
| 1099 | \r | |
| 1100 | //\r | |
| 1101 | // Register event for ExitPmAuth, so that we can uninstall ACPI SDT protocol after ExitPmAuth.\r | |
| 1102 | //\r | |
| 1103 | EfiCreateProtocolNotifyEvent (\r | |
| 1104 | &gEfiDxeSmmReadyToLockProtocolGuid,\r | |
| 1105 | TPL_CALLBACK,\r | |
| 1106 | ExitPmAuthNotification,\r | |
| 1107 | NULL,\r | |
| 1108 | &Registration\r | |
| 1109 | );\r | |
| 1110 | \r | |
| 1111 | return ;\r | |
| 1112 | }\r |