| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: nsinit - namespace initialization |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include "acpi.h" |
| 45 | #include "accommon.h" |
| 46 | #include "acnamesp.h" |
| 47 | #include "acdispat.h" |
| 48 | #include "acinterp.h" |
| 49 | #include "acevents.h" |
| 50 | |
| 51 | #define _COMPONENT ACPI_NAMESPACE |
| 52 | ACPI_MODULE_NAME ("nsinit" ) |
| 53 | |
| 54 | /* Local prototypes */ |
| 55 | |
| 56 | static ACPI_STATUS |
| 57 | AcpiNsInitOneObject ( |
| 58 | ACPI_HANDLE ObjHandle, |
| 59 | UINT32 Level, |
| 60 | void *Context, |
| 61 | void **ReturnValue); |
| 62 | |
| 63 | static ACPI_STATUS |
| 64 | AcpiNsInitOneDevice ( |
| 65 | ACPI_HANDLE ObjHandle, |
| 66 | UINT32 NestingLevel, |
| 67 | void *Context, |
| 68 | void **ReturnValue); |
| 69 | |
| 70 | static ACPI_STATUS |
| 71 | AcpiNsFindIniMethods ( |
| 72 | ACPI_HANDLE ObjHandle, |
| 73 | UINT32 NestingLevel, |
| 74 | void *Context, |
| 75 | void **ReturnValue); |
| 76 | |
| 77 | |
| 78 | /******************************************************************************* |
| 79 | * |
| 80 | * FUNCTION: AcpiNsInitializeObjects |
| 81 | * |
| 82 | * PARAMETERS: None |
| 83 | * |
| 84 | * RETURN: Status |
| 85 | * |
| 86 | * DESCRIPTION: Walk the entire namespace and perform any necessary |
| 87 | * initialization on the objects found therein |
| 88 | * |
| 89 | ******************************************************************************/ |
| 90 | |
| 91 | ACPI_STATUS |
| 92 | AcpiNsInitializeObjects ( |
| 93 | void) |
| 94 | { |
| 95 | ACPI_STATUS Status; |
| 96 | ACPI_INIT_WALK_INFO Info; |
| 97 | |
| 98 | |
| 99 | ACPI_FUNCTION_TRACE (NsInitializeObjects); |
| 100 | |
| 101 | |
| 102 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 103 | "[Init] Completing Initialization of ACPI Objects\n" )); |
| 104 | ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, |
| 105 | "**** Starting initialization of namespace objects ****\n" )); |
| 106 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, |
| 107 | "Completing Region/Field/Buffer/Package initialization:\n" )); |
| 108 | |
| 109 | /* Set all init info to zero */ |
| 110 | |
| 111 | memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO)); |
| 112 | |
| 113 | /* Walk entire namespace from the supplied root */ |
| 114 | |
| 115 | Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
| 116 | ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL, |
| 117 | &Info, NULL); |
| 118 | if (ACPI_FAILURE (Status)) |
| 119 | { |
| 120 | ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace" )); |
| 121 | } |
| 122 | |
| 123 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, |
| 124 | " Initialized %u/%u Regions %u/%u Fields %u/%u " |
| 125 | "Buffers %u/%u Packages (%u nodes)\n" , |
| 126 | Info.OpRegionInit, Info.OpRegionCount, |
| 127 | Info.FieldInit, Info.FieldCount, |
| 128 | Info.BufferInit, Info.BufferCount, |
| 129 | Info.PackageInit, Info.PackageCount, Info.ObjectCount)); |
| 130 | |
| 131 | ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, |
| 132 | "%u Control Methods found\n%u Op Regions found\n" , |
| 133 | Info.MethodCount, Info.OpRegionCount)); |
| 134 | |
| 135 | return_ACPI_STATUS (AE_OK); |
| 136 | } |
| 137 | |
| 138 | |
| 139 | /******************************************************************************* |
| 140 | * |
| 141 | * FUNCTION: AcpiNsInitializeDevices |
| 142 | * |
| 143 | * PARAMETERS: None |
| 144 | * |
| 145 | * RETURN: ACPI_STATUS |
| 146 | * |
| 147 | * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. |
| 148 | * This means running _INI on all present devices. |
| 149 | * |
| 150 | * Note: We install PCI config space handler on region access, |
| 151 | * not here. |
| 152 | * |
| 153 | ******************************************************************************/ |
| 154 | |
| 155 | ACPI_STATUS |
| 156 | AcpiNsInitializeDevices ( |
| 157 | UINT32 Flags) |
| 158 | { |
| 159 | ACPI_STATUS Status = AE_OK; |
| 160 | ACPI_DEVICE_WALK_INFO Info; |
| 161 | ACPI_HANDLE Handle; |
| 162 | |
| 163 | |
| 164 | ACPI_FUNCTION_TRACE (NsInitializeDevices); |
| 165 | |
| 166 | |
| 167 | if (!(Flags & ACPI_NO_DEVICE_INIT)) |
| 168 | { |
| 169 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 170 | "[Init] Initializing ACPI Devices\n" )); |
| 171 | |
| 172 | /* Init counters */ |
| 173 | |
| 174 | Info.DeviceCount = 0; |
| 175 | Info.Num_STA = 0; |
| 176 | Info.Num_INI = 0; |
| 177 | |
| 178 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, |
| 179 | "Initializing Device/Processor/Thermal objects " |
| 180 | "and executing _INI/_STA methods:\n" )); |
| 181 | |
| 182 | /* Tree analysis: find all subtrees that contain _INI methods */ |
| 183 | |
| 184 | Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
| 185 | ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL); |
| 186 | if (ACPI_FAILURE (Status)) |
| 187 | { |
| 188 | goto ErrorExit; |
| 189 | } |
| 190 | |
| 191 | /* Allocate the evaluation information block */ |
| 192 | |
| 193 | Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); |
| 194 | if (!Info.EvaluateInfo) |
| 195 | { |
| 196 | Status = AE_NO_MEMORY; |
| 197 | goto ErrorExit; |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Execute the "global" _INI method that may appear at the root. |
| 202 | * This support is provided for Windows compatibility (Vista+) and |
| 203 | * is not part of the ACPI specification. |
| 204 | */ |
| 205 | Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode; |
| 206 | Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI; |
| 207 | Info.EvaluateInfo->Parameters = NULL; |
| 208 | Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE; |
| 209 | |
| 210 | Status = AcpiNsEvaluate (Info.EvaluateInfo); |
| 211 | if (ACPI_SUCCESS (Status)) |
| 212 | { |
| 213 | Info.Num_INI++; |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * Execute \_SB._INI. |
| 218 | * There appears to be a strict order requirement for \_SB._INI, |
| 219 | * which should be evaluated before any _REG evaluations. |
| 220 | */ |
| 221 | Status = AcpiGetHandle (NULL, "\\_SB" , &Handle); |
| 222 | if (ACPI_SUCCESS (Status)) |
| 223 | { |
| 224 | memset (Info.EvaluateInfo, 0, sizeof (ACPI_EVALUATE_INFO)); |
| 225 | Info.EvaluateInfo->PrefixNode = Handle; |
| 226 | Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI; |
| 227 | Info.EvaluateInfo->Parameters = NULL; |
| 228 | Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE; |
| 229 | |
| 230 | Status = AcpiNsEvaluate (Info.EvaluateInfo); |
| 231 | if (ACPI_SUCCESS (Status)) |
| 232 | { |
| 233 | Info.Num_INI++; |
| 234 | } |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | * Run all _REG methods |
| 240 | * |
| 241 | * Note: Any objects accessed by the _REG methods will be automatically |
| 242 | * initialized, even if they contain executable AML (see the call to |
| 243 | * AcpiNsInitializeObjects below). |
| 244 | * |
| 245 | * Note: According to the ACPI specification, we actually needn't execute |
| 246 | * _REG for SystemMemory/SystemIo operation regions, but for PCI_Config |
| 247 | * operation regions, it is required to evaluate _REG for those on a PCI |
| 248 | * root bus that doesn't contain _BBN object. So this code is kept here |
| 249 | * in order not to break things. |
| 250 | */ |
| 251 | if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT)) |
| 252 | { |
| 253 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 254 | "[Init] Executing _REG OpRegion methods\n" )); |
| 255 | |
| 256 | Status = AcpiEvInitializeOpRegions (); |
| 257 | if (ACPI_FAILURE (Status)) |
| 258 | { |
| 259 | goto ErrorExit; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | if (!(Flags & ACPI_NO_DEVICE_INIT)) |
| 264 | { |
| 265 | /* Walk namespace to execute all _INIs on present devices */ |
| 266 | |
| 267 | Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
| 268 | ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL); |
| 269 | |
| 270 | /* |
| 271 | * Any _OSI requests should be completed by now. If the BIOS has |
| 272 | * requested any Windows OSI strings, we will always truncate |
| 273 | * I/O addresses to 16 bits -- for Windows compatibility. |
| 274 | */ |
| 275 | if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000) |
| 276 | { |
| 277 | AcpiGbl_TruncateIoAddresses = TRUE; |
| 278 | } |
| 279 | |
| 280 | ACPI_FREE (Info.EvaluateInfo); |
| 281 | if (ACPI_FAILURE (Status)) |
| 282 | { |
| 283 | goto ErrorExit; |
| 284 | } |
| 285 | |
| 286 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, |
| 287 | " Executed %u _INI methods requiring %u _STA executions " |
| 288 | "(examined %u objects)\n" , |
| 289 | Info.Num_INI, Info.Num_STA, Info.DeviceCount)); |
| 290 | } |
| 291 | |
| 292 | return_ACPI_STATUS (Status); |
| 293 | |
| 294 | |
| 295 | ErrorExit: |
| 296 | ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization" )); |
| 297 | return_ACPI_STATUS (Status); |
| 298 | } |
| 299 | |
| 300 | |
| 301 | /******************************************************************************* |
| 302 | * |
| 303 | * FUNCTION: AcpiNsInitOneObject |
| 304 | * |
| 305 | * PARAMETERS: ObjHandle - Node |
| 306 | * Level - Current nesting level |
| 307 | * Context - Points to a init info struct |
| 308 | * ReturnValue - Not used |
| 309 | * |
| 310 | * RETURN: Status |
| 311 | * |
| 312 | * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object |
| 313 | * within the namespace. |
| 314 | * |
| 315 | * Currently, the only objects that require initialization are: |
| 316 | * 1) Methods |
| 317 | * 2) Op Regions |
| 318 | * |
| 319 | ******************************************************************************/ |
| 320 | |
| 321 | static ACPI_STATUS |
| 322 | AcpiNsInitOneObject ( |
| 323 | ACPI_HANDLE ObjHandle, |
| 324 | UINT32 Level, |
| 325 | void *Context, |
| 326 | void **ReturnValue) |
| 327 | { |
| 328 | ACPI_OBJECT_TYPE Type; |
| 329 | ACPI_STATUS Status = AE_OK; |
| 330 | ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context; |
| 331 | ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; |
| 332 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 333 | |
| 334 | |
| 335 | ACPI_FUNCTION_NAME (NsInitOneObject); |
| 336 | |
| 337 | |
| 338 | Info->ObjectCount++; |
| 339 | |
| 340 | /* And even then, we are only interested in a few object types */ |
| 341 | |
| 342 | Type = AcpiNsGetType (ObjHandle); |
| 343 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 344 | if (!ObjDesc) |
| 345 | { |
| 346 | return (AE_OK); |
| 347 | } |
| 348 | |
| 349 | /* Increment counters for object types we are looking for */ |
| 350 | |
| 351 | switch (Type) |
| 352 | { |
| 353 | case ACPI_TYPE_REGION: |
| 354 | |
| 355 | Info->OpRegionCount++; |
| 356 | break; |
| 357 | |
| 358 | case ACPI_TYPE_BUFFER_FIELD: |
| 359 | |
| 360 | Info->FieldCount++; |
| 361 | break; |
| 362 | |
| 363 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 364 | |
| 365 | Info->FieldCount++; |
| 366 | break; |
| 367 | |
| 368 | case ACPI_TYPE_BUFFER: |
| 369 | |
| 370 | Info->BufferCount++; |
| 371 | break; |
| 372 | |
| 373 | case ACPI_TYPE_PACKAGE: |
| 374 | |
| 375 | Info->PackageCount++; |
| 376 | break; |
| 377 | |
| 378 | default: |
| 379 | |
| 380 | /* No init required, just exit now */ |
| 381 | |
| 382 | return (AE_OK); |
| 383 | } |
| 384 | |
| 385 | /* If the object is already initialized, nothing else to do */ |
| 386 | |
| 387 | if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID) |
| 388 | { |
| 389 | return (AE_OK); |
| 390 | } |
| 391 | |
| 392 | /* Must lock the interpreter before executing AML code */ |
| 393 | |
| 394 | AcpiExEnterInterpreter (); |
| 395 | |
| 396 | /* |
| 397 | * Each of these types can contain executable AML code within the |
| 398 | * declaration. |
| 399 | */ |
| 400 | switch (Type) |
| 401 | { |
| 402 | case ACPI_TYPE_REGION: |
| 403 | |
| 404 | Info->OpRegionInit++; |
| 405 | Status = AcpiDsGetRegionArguments (ObjDesc); |
| 406 | break; |
| 407 | |
| 408 | case ACPI_TYPE_BUFFER_FIELD: |
| 409 | |
| 410 | Info->FieldInit++; |
| 411 | Status = AcpiDsGetBufferFieldArguments (ObjDesc); |
| 412 | break; |
| 413 | |
| 414 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 415 | |
| 416 | Info->FieldInit++; |
| 417 | Status = AcpiDsGetBankFieldArguments (ObjDesc); |
| 418 | break; |
| 419 | |
| 420 | case ACPI_TYPE_BUFFER: |
| 421 | |
| 422 | Info->BufferInit++; |
| 423 | Status = AcpiDsGetBufferArguments (ObjDesc); |
| 424 | break; |
| 425 | |
| 426 | case ACPI_TYPE_PACKAGE: |
| 427 | |
| 428 | Info->PackageInit++; |
| 429 | Status = AcpiDsGetPackageArguments (ObjDesc); |
| 430 | break; |
| 431 | |
| 432 | default: |
| 433 | |
| 434 | /* No other types can get here */ |
| 435 | |
| 436 | break; |
| 437 | } |
| 438 | |
| 439 | if (ACPI_FAILURE (Status)) |
| 440 | { |
| 441 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 442 | "Could not execute arguments for [%4.4s] (%s)" , |
| 443 | AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type))); |
| 444 | } |
| 445 | |
| 446 | /* |
| 447 | * We ignore errors from above, and always return OK, since we don't want |
| 448 | * to abort the walk on any single error. |
| 449 | */ |
| 450 | AcpiExExitInterpreter (); |
| 451 | return (AE_OK); |
| 452 | } |
| 453 | |
| 454 | |
| 455 | /******************************************************************************* |
| 456 | * |
| 457 | * FUNCTION: AcpiNsFindIniMethods |
| 458 | * |
| 459 | * PARAMETERS: ACPI_WALK_CALLBACK |
| 460 | * |
| 461 | * RETURN: ACPI_STATUS |
| 462 | * |
| 463 | * DESCRIPTION: Called during namespace walk. Finds objects named _INI under |
| 464 | * device/processor/thermal objects, and marks the entire subtree |
| 465 | * with a SUBTREE_HAS_INI flag. This flag is used during the |
| 466 | * subsequent device initialization walk to avoid entire subtrees |
| 467 | * that do not contain an _INI. |
| 468 | * |
| 469 | ******************************************************************************/ |
| 470 | |
| 471 | static ACPI_STATUS |
| 472 | AcpiNsFindIniMethods ( |
| 473 | ACPI_HANDLE ObjHandle, |
| 474 | UINT32 NestingLevel, |
| 475 | void *Context, |
| 476 | void **ReturnValue) |
| 477 | { |
| 478 | ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); |
| 479 | ACPI_NAMESPACE_NODE *Node; |
| 480 | ACPI_NAMESPACE_NODE *ParentNode; |
| 481 | |
| 482 | |
| 483 | /* Keep count of device/processor/thermal objects */ |
| 484 | |
| 485 | Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); |
| 486 | if ((Node->Type == ACPI_TYPE_DEVICE) || |
| 487 | (Node->Type == ACPI_TYPE_PROCESSOR) || |
| 488 | (Node->Type == ACPI_TYPE_THERMAL)) |
| 489 | { |
| 490 | Info->DeviceCount++; |
| 491 | return (AE_OK); |
| 492 | } |
| 493 | |
| 494 | /* We are only looking for methods named _INI */ |
| 495 | |
| 496 | if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI)) |
| 497 | { |
| 498 | return (AE_OK); |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | * The only _INI methods that we care about are those that are |
| 503 | * present under Device, Processor, and Thermal objects. |
| 504 | */ |
| 505 | ParentNode = Node->Parent; |
| 506 | switch (ParentNode->Type) |
| 507 | { |
| 508 | case ACPI_TYPE_DEVICE: |
| 509 | case ACPI_TYPE_PROCESSOR: |
| 510 | case ACPI_TYPE_THERMAL: |
| 511 | |
| 512 | /* Mark parent and bubble up the INI present flag to the root */ |
| 513 | |
| 514 | while (ParentNode) |
| 515 | { |
| 516 | ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI; |
| 517 | ParentNode = ParentNode->Parent; |
| 518 | } |
| 519 | break; |
| 520 | |
| 521 | default: |
| 522 | |
| 523 | break; |
| 524 | } |
| 525 | |
| 526 | return (AE_OK); |
| 527 | } |
| 528 | |
| 529 | |
| 530 | /******************************************************************************* |
| 531 | * |
| 532 | * FUNCTION: AcpiNsInitOneDevice |
| 533 | * |
| 534 | * PARAMETERS: ACPI_WALK_CALLBACK |
| 535 | * |
| 536 | * RETURN: ACPI_STATUS |
| 537 | * |
| 538 | * DESCRIPTION: This is called once per device soon after ACPI is enabled |
| 539 | * to initialize each device. It determines if the device is |
| 540 | * present, and if so, calls _INI. |
| 541 | * |
| 542 | ******************************************************************************/ |
| 543 | |
| 544 | static ACPI_STATUS |
| 545 | AcpiNsInitOneDevice ( |
| 546 | ACPI_HANDLE ObjHandle, |
| 547 | UINT32 NestingLevel, |
| 548 | void *Context, |
| 549 | void **ReturnValue) |
| 550 | { |
| 551 | ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); |
| 552 | ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo; |
| 553 | UINT32 Flags; |
| 554 | ACPI_STATUS Status; |
| 555 | ACPI_NAMESPACE_NODE *DeviceNode; |
| 556 | |
| 557 | |
| 558 | ACPI_FUNCTION_TRACE (NsInitOneDevice); |
| 559 | |
| 560 | |
| 561 | /* We are interested in Devices, Processors and ThermalZones only */ |
| 562 | |
| 563 | DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); |
| 564 | if ((DeviceNode->Type != ACPI_TYPE_DEVICE) && |
| 565 | (DeviceNode->Type != ACPI_TYPE_PROCESSOR) && |
| 566 | (DeviceNode->Type != ACPI_TYPE_THERMAL)) |
| 567 | { |
| 568 | return_ACPI_STATUS (AE_OK); |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * Because of an earlier namespace analysis, all subtrees that contain an |
| 573 | * _INI method are tagged. |
| 574 | * |
| 575 | * If this device subtree does not contain any _INI methods, we |
| 576 | * can exit now and stop traversing this entire subtree. |
| 577 | */ |
| 578 | if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI)) |
| 579 | { |
| 580 | return_ACPI_STATUS (AE_CTRL_DEPTH); |
| 581 | } |
| 582 | |
| 583 | /* |
| 584 | * Run _STA to determine if this device is present and functioning. We |
| 585 | * must know this information for two important reasons (from ACPI spec): |
| 586 | * |
| 587 | * 1) We can only run _INI if the device is present. |
| 588 | * 2) We must abort the device tree walk on this subtree if the device is |
| 589 | * not present and is not functional (we will not examine the children) |
| 590 | * |
| 591 | * The _STA method is not required to be present under the device, we |
| 592 | * assume the device is present if _STA does not exist. |
| 593 | */ |
| 594 | ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( |
| 595 | ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA)); |
| 596 | |
| 597 | Status = AcpiUtExecute_STA (DeviceNode, &Flags); |
| 598 | if (ACPI_FAILURE (Status)) |
| 599 | { |
| 600 | /* Ignore error and move on to next device */ |
| 601 | |
| 602 | return_ACPI_STATUS (AE_OK); |
| 603 | } |
| 604 | |
| 605 | /* |
| 606 | * Flags == -1 means that _STA was not found. In this case, we assume that |
| 607 | * the device is both present and functional. |
| 608 | * |
| 609 | * From the ACPI spec, description of _STA: |
| 610 | * |
| 611 | * "If a device object (including the processor object) does not have an |
| 612 | * _STA object, then OSPM assumes that all of the above bits are set (in |
| 613 | * other words, the device is present, ..., and functioning)" |
| 614 | */ |
| 615 | if (Flags != ACPI_UINT32_MAX) |
| 616 | { |
| 617 | WalkInfo->Num_STA++; |
| 618 | } |
| 619 | |
| 620 | /* |
| 621 | * Examine the PRESENT and FUNCTIONING status bits |
| 622 | * |
| 623 | * Note: ACPI spec does not seem to specify behavior for the present but |
| 624 | * not functioning case, so we assume functioning if present. |
| 625 | */ |
| 626 | if (!(Flags & ACPI_STA_DEVICE_PRESENT)) |
| 627 | { |
| 628 | /* Device is not present, we must examine the Functioning bit */ |
| 629 | |
| 630 | if (Flags & ACPI_STA_DEVICE_FUNCTIONING) |
| 631 | { |
| 632 | /* |
| 633 | * Device is not present but is "functioning". In this case, |
| 634 | * we will not run _INI, but we continue to examine the children |
| 635 | * of this device. |
| 636 | * |
| 637 | * From the ACPI spec, description of _STA: (Note - no mention |
| 638 | * of whether to run _INI or not on the device in question) |
| 639 | * |
| 640 | * "_STA may return bit 0 clear (not present) with bit 3 set |
| 641 | * (device is functional). This case is used to indicate a valid |
| 642 | * device for which no device driver should be loaded (for example, |
| 643 | * a bridge device.) Children of this device may be present and |
| 644 | * valid. OSPM should continue enumeration below a device whose |
| 645 | * _STA returns this bit combination" |
| 646 | */ |
| 647 | return_ACPI_STATUS (AE_OK); |
| 648 | } |
| 649 | else |
| 650 | { |
| 651 | /* |
| 652 | * Device is not present and is not functioning. We must abort the |
| 653 | * walk of this subtree immediately -- don't look at the children |
| 654 | * of such a device. |
| 655 | * |
| 656 | * From the ACPI spec, description of _INI: |
| 657 | * |
| 658 | * "If the _STA method indicates that the device is not present, |
| 659 | * OSPM will not run the _INI and will not examine the children |
| 660 | * of the device for _INI methods" |
| 661 | */ |
| 662 | return_ACPI_STATUS (AE_CTRL_DEPTH); |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | /* |
| 667 | * The device is present or is assumed present if no _STA exists. |
| 668 | * Run the _INI if it exists (not required to exist) |
| 669 | * |
| 670 | * Note: We know there is an _INI within this subtree, but it may not be |
| 671 | * under this particular device, it may be lower in the branch. |
| 672 | */ |
| 673 | if (!ACPI_COMPARE_NAME (DeviceNode->Name.Ascii, "_SB_" ) || |
| 674 | DeviceNode->Parent != AcpiGbl_RootNode) |
| 675 | { |
| 676 | ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( |
| 677 | ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI)); |
| 678 | |
| 679 | memset (Info, 0, sizeof (ACPI_EVALUATE_INFO)); |
| 680 | Info->PrefixNode = DeviceNode; |
| 681 | Info->RelativePathname = METHOD_NAME__INI; |
| 682 | Info->Parameters = NULL; |
| 683 | Info->Flags = ACPI_IGNORE_RETURN_VALUE; |
| 684 | |
| 685 | Status = AcpiNsEvaluate (Info); |
| 686 | if (ACPI_SUCCESS (Status)) |
| 687 | { |
| 688 | WalkInfo->Num_INI++; |
| 689 | } |
| 690 | |
| 691 | #ifdef ACPI_DEBUG_OUTPUT |
| 692 | else if (Status != AE_NOT_FOUND) |
| 693 | { |
| 694 | /* Ignore error and move on to next device */ |
| 695 | |
| 696 | char *ScopeName = AcpiNsGetNormalizedPathname (DeviceNode, TRUE); |
| 697 | |
| 698 | ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution" , |
| 699 | ScopeName)); |
| 700 | ACPI_FREE (ScopeName); |
| 701 | } |
| 702 | #endif |
| 703 | } |
| 704 | |
| 705 | /* Ignore errors from above */ |
| 706 | |
| 707 | Status = AE_OK; |
| 708 | |
| 709 | /* |
| 710 | * The _INI method has been run if present; call the Global Initialization |
| 711 | * Handler for this device. |
| 712 | */ |
| 713 | if (AcpiGbl_InitHandler) |
| 714 | { |
| 715 | Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI); |
| 716 | } |
| 717 | |
| 718 | return_ACPI_STATUS (Status); |
| 719 | } |
| 720 | |