| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evhandler - Support for Address Space handlers |
| 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 "acevents.h" |
| 47 | #include "acnamesp.h" |
| 48 | #include "acinterp.h" |
| 49 | |
| 50 | #define _COMPONENT ACPI_EVENTS |
| 51 | ACPI_MODULE_NAME ("evhandler" ) |
| 52 | |
| 53 | |
| 54 | /* Local prototypes */ |
| 55 | |
| 56 | static ACPI_STATUS |
| 57 | AcpiEvInstallHandler ( |
| 58 | ACPI_HANDLE ObjHandle, |
| 59 | UINT32 Level, |
| 60 | void *Context, |
| 61 | void **ReturnValue); |
| 62 | |
| 63 | |
| 64 | /* These are the address spaces that will get default handlers */ |
| 65 | |
| 66 | UINT8 AcpiGbl_DefaultAddressSpaces[ACPI_NUM_DEFAULT_SPACES] = |
| 67 | { |
| 68 | ACPI_ADR_SPACE_SYSTEM_MEMORY, |
| 69 | ACPI_ADR_SPACE_SYSTEM_IO, |
| 70 | ACPI_ADR_SPACE_PCI_CONFIG, |
| 71 | ACPI_ADR_SPACE_DATA_TABLE |
| 72 | }; |
| 73 | |
| 74 | |
| 75 | /******************************************************************************* |
| 76 | * |
| 77 | * FUNCTION: AcpiEvInstallRegionHandlers |
| 78 | * |
| 79 | * PARAMETERS: None |
| 80 | * |
| 81 | * RETURN: Status |
| 82 | * |
| 83 | * DESCRIPTION: Installs the core subsystem default address space handlers. |
| 84 | * |
| 85 | ******************************************************************************/ |
| 86 | |
| 87 | ACPI_STATUS |
| 88 | AcpiEvInstallRegionHandlers ( |
| 89 | void) |
| 90 | { |
| 91 | ACPI_STATUS Status; |
| 92 | UINT32 i; |
| 93 | |
| 94 | |
| 95 | ACPI_FUNCTION_TRACE (EvInstallRegionHandlers); |
| 96 | |
| 97 | |
| 98 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 99 | if (ACPI_FAILURE (Status)) |
| 100 | { |
| 101 | return_ACPI_STATUS (Status); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * All address spaces (PCI Config, EC, SMBus) are scope dependent and |
| 106 | * registration must occur for a specific device. |
| 107 | * |
| 108 | * In the case of the system memory and IO address spaces there is |
| 109 | * currently no device associated with the address space. For these we |
| 110 | * use the root. |
| 111 | * |
| 112 | * We install the default PCI config space handler at the root so that |
| 113 | * this space is immediately available even though the we have not |
| 114 | * enumerated all the PCI Root Buses yet. This is to conform to the ACPI |
| 115 | * specification which states that the PCI config space must be always |
| 116 | * available -- even though we are nowhere near ready to find the PCI root |
| 117 | * buses at this point. |
| 118 | * |
| 119 | * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler |
| 120 | * has already been installed (via AcpiInstallAddressSpaceHandler). |
| 121 | * Similar for AE_SAME_HANDLER. |
| 122 | */ |
| 123 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) |
| 124 | { |
| 125 | Status = AcpiEvInstallSpaceHandler (AcpiGbl_RootNode, |
| 126 | AcpiGbl_DefaultAddressSpaces[i], |
| 127 | ACPI_DEFAULT_HANDLER, NULL, NULL); |
| 128 | switch (Status) |
| 129 | { |
| 130 | case AE_OK: |
| 131 | case AE_SAME_HANDLER: |
| 132 | case AE_ALREADY_EXISTS: |
| 133 | |
| 134 | /* These exceptions are all OK */ |
| 135 | |
| 136 | Status = AE_OK; |
| 137 | break; |
| 138 | |
| 139 | default: |
| 140 | |
| 141 | goto UnlockAndExit; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | UnlockAndExit: |
| 146 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 147 | return_ACPI_STATUS (Status); |
| 148 | } |
| 149 | |
| 150 | |
| 151 | /******************************************************************************* |
| 152 | * |
| 153 | * FUNCTION: AcpiEvHasDefaultHandler |
| 154 | * |
| 155 | * PARAMETERS: Node - Namespace node for the device |
| 156 | * SpaceId - The address space ID |
| 157 | * |
| 158 | * RETURN: TRUE if default handler is installed, FALSE otherwise |
| 159 | * |
| 160 | * DESCRIPTION: Check if the default handler is installed for the requested |
| 161 | * space ID. |
| 162 | * |
| 163 | ******************************************************************************/ |
| 164 | |
| 165 | BOOLEAN |
| 166 | AcpiEvHasDefaultHandler ( |
| 167 | ACPI_NAMESPACE_NODE *Node, |
| 168 | ACPI_ADR_SPACE_TYPE SpaceId) |
| 169 | { |
| 170 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 171 | ACPI_OPERAND_OBJECT *HandlerObj; |
| 172 | |
| 173 | |
| 174 | /* Must have an existing internal object */ |
| 175 | |
| 176 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 177 | if (ObjDesc) |
| 178 | { |
| 179 | HandlerObj = ObjDesc->CommonNotify.Handler; |
| 180 | |
| 181 | /* Walk the linked list of handlers for this object */ |
| 182 | |
| 183 | while (HandlerObj) |
| 184 | { |
| 185 | if (HandlerObj->AddressSpace.SpaceId == SpaceId) |
| 186 | { |
| 187 | if (HandlerObj->AddressSpace.HandlerFlags & |
| 188 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) |
| 189 | { |
| 190 | return (TRUE); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | HandlerObj = HandlerObj->AddressSpace.Next; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | return (FALSE); |
| 199 | } |
| 200 | |
| 201 | |
| 202 | /******************************************************************************* |
| 203 | * |
| 204 | * FUNCTION: AcpiEvInstallHandler |
| 205 | * |
| 206 | * PARAMETERS: WalkNamespace callback |
| 207 | * |
| 208 | * DESCRIPTION: This routine installs an address handler into objects that are |
| 209 | * of type Region or Device. |
| 210 | * |
| 211 | * If the Object is a Device, and the device has a handler of |
| 212 | * the same type then the search is terminated in that branch. |
| 213 | * |
| 214 | * This is because the existing handler is closer in proximity |
| 215 | * to any more regions than the one we are trying to install. |
| 216 | * |
| 217 | ******************************************************************************/ |
| 218 | |
| 219 | static ACPI_STATUS |
| 220 | AcpiEvInstallHandler ( |
| 221 | ACPI_HANDLE ObjHandle, |
| 222 | UINT32 Level, |
| 223 | void *Context, |
| 224 | void **ReturnValue) |
| 225 | { |
| 226 | ACPI_OPERAND_OBJECT *HandlerObj; |
| 227 | ACPI_OPERAND_OBJECT *NextHandlerObj; |
| 228 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 229 | ACPI_NAMESPACE_NODE *Node; |
| 230 | ACPI_STATUS Status; |
| 231 | |
| 232 | |
| 233 | ACPI_FUNCTION_NAME (EvInstallHandler); |
| 234 | |
| 235 | |
| 236 | HandlerObj = (ACPI_OPERAND_OBJECT *) Context; |
| 237 | |
| 238 | /* Parameter validation */ |
| 239 | |
| 240 | if (!HandlerObj) |
| 241 | { |
| 242 | return (AE_OK); |
| 243 | } |
| 244 | |
| 245 | /* Convert and validate the device handle */ |
| 246 | |
| 247 | Node = AcpiNsValidateHandle (ObjHandle); |
| 248 | if (!Node) |
| 249 | { |
| 250 | return (AE_BAD_PARAMETER); |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * We only care about regions and objects that are allowed to have |
| 255 | * address space handlers |
| 256 | */ |
| 257 | if ((Node->Type != ACPI_TYPE_DEVICE) && |
| 258 | (Node->Type != ACPI_TYPE_REGION) && |
| 259 | (Node != AcpiGbl_RootNode)) |
| 260 | { |
| 261 | return (AE_OK); |
| 262 | } |
| 263 | |
| 264 | /* Check for an existing internal object */ |
| 265 | |
| 266 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 267 | if (!ObjDesc) |
| 268 | { |
| 269 | /* No object, just exit */ |
| 270 | |
| 271 | return (AE_OK); |
| 272 | } |
| 273 | |
| 274 | /* Devices are handled different than regions */ |
| 275 | |
| 276 | if (ObjDesc->Common.Type == ACPI_TYPE_DEVICE) |
| 277 | { |
| 278 | /* Check if this Device already has a handler for this address space */ |
| 279 | |
| 280 | NextHandlerObj = AcpiEvFindRegionHandler ( |
| 281 | HandlerObj->AddressSpace.SpaceId, ObjDesc->CommonNotify.Handler); |
| 282 | if (NextHandlerObj) |
| 283 | { |
| 284 | /* Found a handler, is it for the same address space? */ |
| 285 | |
| 286 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, |
| 287 | "Found handler for region [%s] in device %p(%p) handler %p\n" , |
| 288 | AcpiUtGetRegionName (HandlerObj->AddressSpace.SpaceId), |
| 289 | ObjDesc, NextHandlerObj, HandlerObj)); |
| 290 | |
| 291 | /* |
| 292 | * Since the object we found it on was a device, then it means |
| 293 | * that someone has already installed a handler for the branch |
| 294 | * of the namespace from this device on. Just bail out telling |
| 295 | * the walk routine to not traverse this branch. This preserves |
| 296 | * the scoping rule for handlers. |
| 297 | */ |
| 298 | return (AE_CTRL_DEPTH); |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * As long as the device didn't have a handler for this space we |
| 303 | * don't care about it. We just ignore it and proceed. |
| 304 | */ |
| 305 | return (AE_OK); |
| 306 | } |
| 307 | |
| 308 | /* Object is a Region */ |
| 309 | |
| 310 | if (ObjDesc->Region.SpaceId != HandlerObj->AddressSpace.SpaceId) |
| 311 | { |
| 312 | /* This region is for a different address space, just ignore it */ |
| 313 | |
| 314 | return (AE_OK); |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * Now we have a region and it is for the handler's address space type. |
| 319 | * |
| 320 | * First disconnect region for any previous handler (if any) |
| 321 | */ |
| 322 | AcpiEvDetachRegion (ObjDesc, FALSE); |
| 323 | |
| 324 | /* Connect the region to the new handler */ |
| 325 | |
| 326 | Status = AcpiEvAttachRegion (HandlerObj, ObjDesc, FALSE); |
| 327 | return (Status); |
| 328 | } |
| 329 | |
| 330 | |
| 331 | /******************************************************************************* |
| 332 | * |
| 333 | * FUNCTION: AcpiEvFindRegionHandler |
| 334 | * |
| 335 | * PARAMETERS: SpaceId - The address space ID |
| 336 | * HandlerObj - Head of the handler object list |
| 337 | * |
| 338 | * RETURN: Matching handler object. NULL if space ID not matched |
| 339 | * |
| 340 | * DESCRIPTION: Search a handler object list for a match on the address |
| 341 | * space ID. |
| 342 | * |
| 343 | ******************************************************************************/ |
| 344 | |
| 345 | ACPI_OPERAND_OBJECT * |
| 346 | AcpiEvFindRegionHandler ( |
| 347 | ACPI_ADR_SPACE_TYPE SpaceId, |
| 348 | ACPI_OPERAND_OBJECT *HandlerObj) |
| 349 | { |
| 350 | |
| 351 | /* Walk the handler list for this device */ |
| 352 | |
| 353 | while (HandlerObj) |
| 354 | { |
| 355 | /* Same SpaceId indicates a handler is installed */ |
| 356 | |
| 357 | if (HandlerObj->AddressSpace.SpaceId == SpaceId) |
| 358 | { |
| 359 | return (HandlerObj); |
| 360 | } |
| 361 | |
| 362 | /* Next handler object */ |
| 363 | |
| 364 | HandlerObj = HandlerObj->AddressSpace.Next; |
| 365 | } |
| 366 | |
| 367 | return (NULL); |
| 368 | } |
| 369 | |
| 370 | |
| 371 | /******************************************************************************* |
| 372 | * |
| 373 | * FUNCTION: AcpiEvInstallSpaceHandler |
| 374 | * |
| 375 | * PARAMETERS: Node - Namespace node for the device |
| 376 | * SpaceId - The address space ID |
| 377 | * Handler - Address of the handler |
| 378 | * Setup - Address of the setup function |
| 379 | * Context - Value passed to the handler on each access |
| 380 | * |
| 381 | * RETURN: Status |
| 382 | * |
| 383 | * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId. |
| 384 | * Assumes namespace is locked |
| 385 | * |
| 386 | ******************************************************************************/ |
| 387 | |
| 388 | ACPI_STATUS |
| 389 | AcpiEvInstallSpaceHandler ( |
| 390 | ACPI_NAMESPACE_NODE *Node, |
| 391 | ACPI_ADR_SPACE_TYPE SpaceId, |
| 392 | ACPI_ADR_SPACE_HANDLER Handler, |
| 393 | ACPI_ADR_SPACE_SETUP Setup, |
| 394 | void *Context) |
| 395 | { |
| 396 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 397 | ACPI_OPERAND_OBJECT *HandlerObj; |
| 398 | ACPI_STATUS Status = AE_OK; |
| 399 | ACPI_OBJECT_TYPE Type; |
| 400 | UINT8 Flags = 0; |
| 401 | |
| 402 | |
| 403 | ACPI_FUNCTION_TRACE (EvInstallSpaceHandler); |
| 404 | |
| 405 | |
| 406 | /* |
| 407 | * This registration is valid for only the types below and the root. |
| 408 | * The root node is where the default handlers get installed. |
| 409 | */ |
| 410 | if ((Node->Type != ACPI_TYPE_DEVICE) && |
| 411 | (Node->Type != ACPI_TYPE_PROCESSOR) && |
| 412 | (Node->Type != ACPI_TYPE_THERMAL) && |
| 413 | (Node != AcpiGbl_RootNode)) |
| 414 | { |
| 415 | Status = AE_BAD_PARAMETER; |
| 416 | goto UnlockAndExit; |
| 417 | } |
| 418 | |
| 419 | if (Handler == ACPI_DEFAULT_HANDLER) |
| 420 | { |
| 421 | Flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; |
| 422 | |
| 423 | switch (SpaceId) |
| 424 | { |
| 425 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: |
| 426 | |
| 427 | Handler = AcpiExSystemMemorySpaceHandler; |
| 428 | Setup = AcpiEvSystemMemoryRegionSetup; |
| 429 | break; |
| 430 | |
| 431 | case ACPI_ADR_SPACE_SYSTEM_IO: |
| 432 | |
| 433 | Handler = AcpiExSystemIoSpaceHandler; |
| 434 | Setup = AcpiEvIoSpaceRegionSetup; |
| 435 | break; |
| 436 | |
| 437 | case ACPI_ADR_SPACE_PCI_CONFIG: |
| 438 | |
| 439 | Handler = AcpiExPciConfigSpaceHandler; |
| 440 | Setup = AcpiEvPciConfigRegionSetup; |
| 441 | break; |
| 442 | |
| 443 | case ACPI_ADR_SPACE_CMOS: |
| 444 | |
| 445 | Handler = AcpiExCmosSpaceHandler; |
| 446 | Setup = AcpiEvCmosRegionSetup; |
| 447 | break; |
| 448 | |
| 449 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: |
| 450 | |
| 451 | Handler = AcpiExPciBarSpaceHandler; |
| 452 | Setup = AcpiEvPciBarRegionSetup; |
| 453 | break; |
| 454 | |
| 455 | case ACPI_ADR_SPACE_DATA_TABLE: |
| 456 | |
| 457 | Handler = AcpiExDataTableSpaceHandler; |
| 458 | Setup = NULL; |
| 459 | break; |
| 460 | |
| 461 | default: |
| 462 | |
| 463 | Status = AE_BAD_PARAMETER; |
| 464 | goto UnlockAndExit; |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | /* If the caller hasn't specified a setup routine, use the default */ |
| 469 | |
| 470 | if (!Setup) |
| 471 | { |
| 472 | Setup = AcpiEvDefaultRegionSetup; |
| 473 | } |
| 474 | |
| 475 | /* Check for an existing internal object */ |
| 476 | |
| 477 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 478 | if (ObjDesc) |
| 479 | { |
| 480 | /* |
| 481 | * The attached device object already exists. Now make sure |
| 482 | * the handler is not already installed. |
| 483 | */ |
| 484 | HandlerObj = AcpiEvFindRegionHandler (SpaceId, |
| 485 | ObjDesc->CommonNotify.Handler); |
| 486 | |
| 487 | if (HandlerObj) |
| 488 | { |
| 489 | if (HandlerObj->AddressSpace.Handler == Handler) |
| 490 | { |
| 491 | /* |
| 492 | * It is (relatively) OK to attempt to install the SAME |
| 493 | * handler twice. This can easily happen with the |
| 494 | * PCI_Config space. |
| 495 | */ |
| 496 | Status = AE_SAME_HANDLER; |
| 497 | goto UnlockAndExit; |
| 498 | } |
| 499 | else |
| 500 | { |
| 501 | /* A handler is already installed */ |
| 502 | |
| 503 | Status = AE_ALREADY_EXISTS; |
| 504 | } |
| 505 | |
| 506 | goto UnlockAndExit; |
| 507 | } |
| 508 | } |
| 509 | else |
| 510 | { |
| 511 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, |
| 512 | "Creating object on Device %p while installing handler\n" , |
| 513 | Node)); |
| 514 | |
| 515 | /* ObjDesc does not exist, create one */ |
| 516 | |
| 517 | if (Node->Type == ACPI_TYPE_ANY) |
| 518 | { |
| 519 | Type = ACPI_TYPE_DEVICE; |
| 520 | } |
| 521 | else |
| 522 | { |
| 523 | Type = Node->Type; |
| 524 | } |
| 525 | |
| 526 | ObjDesc = AcpiUtCreateInternalObject (Type); |
| 527 | if (!ObjDesc) |
| 528 | { |
| 529 | Status = AE_NO_MEMORY; |
| 530 | goto UnlockAndExit; |
| 531 | } |
| 532 | |
| 533 | /* Init new descriptor */ |
| 534 | |
| 535 | ObjDesc->Common.Type = (UINT8) Type; |
| 536 | |
| 537 | /* Attach the new object to the Node */ |
| 538 | |
| 539 | Status = AcpiNsAttachObject (Node, ObjDesc, Type); |
| 540 | |
| 541 | /* Remove local reference to the object */ |
| 542 | |
| 543 | AcpiUtRemoveReference (ObjDesc); |
| 544 | |
| 545 | if (ACPI_FAILURE (Status)) |
| 546 | { |
| 547 | goto UnlockAndExit; |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, |
| 552 | "Installing address handler for region %s(%X) " |
| 553 | "on Device %4.4s %p(%p)\n" , |
| 554 | AcpiUtGetRegionName (SpaceId), SpaceId, |
| 555 | AcpiUtGetNodeName (Node), Node, ObjDesc)); |
| 556 | |
| 557 | /* |
| 558 | * Install the handler |
| 559 | * |
| 560 | * At this point there is no existing handler. Just allocate the object |
| 561 | * for the handler and link it into the list. |
| 562 | */ |
| 563 | HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_ADDRESS_HANDLER); |
| 564 | if (!HandlerObj) |
| 565 | { |
| 566 | Status = AE_NO_MEMORY; |
| 567 | goto UnlockAndExit; |
| 568 | } |
| 569 | |
| 570 | /* Init handler obj */ |
| 571 | |
| 572 | HandlerObj->AddressSpace.SpaceId = (UINT8) SpaceId; |
| 573 | HandlerObj->AddressSpace.HandlerFlags = Flags; |
| 574 | HandlerObj->AddressSpace.RegionList = NULL; |
| 575 | HandlerObj->AddressSpace.Node = Node; |
| 576 | HandlerObj->AddressSpace.Handler = Handler; |
| 577 | HandlerObj->AddressSpace.Context = Context; |
| 578 | HandlerObj->AddressSpace.Setup = Setup; |
| 579 | |
| 580 | /* Install at head of Device.AddressSpace list */ |
| 581 | |
| 582 | HandlerObj->AddressSpace.Next = ObjDesc->CommonNotify.Handler; |
| 583 | |
| 584 | /* |
| 585 | * The Device object is the first reference on the HandlerObj. |
| 586 | * Each region that uses the handler adds a reference. |
| 587 | */ |
| 588 | ObjDesc->CommonNotify.Handler = HandlerObj; |
| 589 | |
| 590 | /* |
| 591 | * Walk the namespace finding all of the regions this handler will |
| 592 | * manage. |
| 593 | * |
| 594 | * Start at the device and search the branch toward the leaf nodes |
| 595 | * until either the leaf is encountered or a device is detected that |
| 596 | * has an address handler of the same type. |
| 597 | * |
| 598 | * In either case, back up and search down the remainder of the branch |
| 599 | */ |
| 600 | Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, |
| 601 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, |
| 602 | AcpiEvInstallHandler, NULL, HandlerObj, NULL); |
| 603 | |
| 604 | UnlockAndExit: |
| 605 | return_ACPI_STATUS (Status); |
| 606 | } |
| 607 | |