drivers/acpi/acpica/evrgnini.c

   1 /******************************************************************************
   2  *
   3  * Module Name: evrgnini- ACPI address_space (op_region) init
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2008, 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/acpi.h>
  45 #include "accommon.h"
  46 #include "acevents.h"
  47 #include "acnamesp.h"
  48
  49 #define _COMPONENT          ACPI_EVENTS
  50 ACPI_MODULE_NAME("evrgnini")
  51
  52 /* Local prototypes */
  53 static u8 acpi_ev_match_pci_root_bridge(char *id);
  54
  55 static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
  56
  57 /*******************************************************************************
  58  *
  59  * FUNCTION:    acpi_ev_system_memory_region_setup
  60  *
  61  * PARAMETERS:  Handle              - Region we are interested in
  62  *              Function            - Start or stop
  63  *              handler_context     - Address space handler context
  64  *              region_context      - Region specific context
  65  *
  66  * RETURN:      Status
  67  *
  68  * DESCRIPTION: Setup a system_memory operation region
  69  *
  70  ******************************************************************************/
  71
  72 acpi_status
  73 acpi_ev_system_memory_region_setup(acpi_handle handle,
  74                                    u32 function,
  75                                    void *handler_context, void **region_context)
  76 {
  77         union acpi_operand_object *region_desc =
  78             (union acpi_operand_object *)handle;
  79         struct acpi_mem_space_context *local_region_context;
  80
  81         ACPI_FUNCTION_TRACE(ev_system_memory_region_setup);
  82
  83         if (function == ACPI_REGION_DEACTIVATE) {
  84                 if (*region_context) {
  85                         local_region_context =
  86                             (struct acpi_mem_space_context *)*region_context;
  87
  88                         /* Delete a cached mapping if present */
  89
  90                         if (local_region_context->mapped_length) {
  91                                 acpi_os_unmap_memory(local_region_context->
  92                                                      mapped_logical_address,
  93                                                      local_region_context->
  94                                                      mapped_length);
  95                         }
  96                         ACPI_FREE(local_region_context);
  97                         *region_context = NULL;
  98                 }
  99                 return_ACPI_STATUS(AE_OK);
 100         }
 101
 102         /* Create a new context */
 103
 104         local_region_context =
 105             ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_mem_space_context));
 106         if (!(local_region_context)) {
 107                 return_ACPI_STATUS(AE_NO_MEMORY);
 108         }
 109
 110         /* Save the region length and address for use in the handler */
 111
 112         local_region_context->length = region_desc->region.length;
 113         local_region_context->address = region_desc->region.address;
 114
 115         *region_context = local_region_context;
 116         return_ACPI_STATUS(AE_OK);
 117 }
 118
 119 /*******************************************************************************
 120  *
 121  * FUNCTION:    acpi_ev_io_space_region_setup
 122  *
 123  * PARAMETERS:  Handle              - Region we are interested in
 124  *              Function            - Start or stop
 125  *              handler_context     - Address space handler context
 126  *              region_context      - Region specific context
 127  *
 128  * RETURN:      Status
 129  *
 130  * DESCRIPTION: Setup a IO operation region
 131  *
 132  ******************************************************************************/
 133
 134 acpi_status
 135 acpi_ev_io_space_region_setup(acpi_handle handle,
 136                               u32 function,
 137                               void *handler_context, void **region_context)
 138 {
 139         ACPI_FUNCTION_TRACE(ev_io_space_region_setup);
 140
 141         if (function == ACPI_REGION_DEACTIVATE) {
 142                 *region_context = NULL;
 143         } else {
 144                 *region_context = handler_context;
 145         }
 146
 147         return_ACPI_STATUS(AE_OK);
 148 }
 149
 150 /*******************************************************************************
 151  *
 152  * FUNCTION:    acpi_ev_pci_config_region_setup
 153  *
 154  * PARAMETERS:  Handle              - Region we are interested in
 155  *              Function            - Start or stop
 156  *              handler_context     - Address space handler context
 157  *              region_context      - Region specific context
 158  *
 159  * RETURN:      Status
 160  *
 161  * DESCRIPTION: Setup a PCI_Config operation region
 162  *
 163  * MUTEX:       Assumes namespace is not locked
 164  *
 165  ******************************************************************************/
 166
 167 acpi_status
 168 acpi_ev_pci_config_region_setup(acpi_handle handle,
 169                                 u32 function,
 170                                 void *handler_context, void **region_context)
 171 {
 172         acpi_status status = AE_OK;
 173         acpi_integer pci_value;
 174         struct acpi_pci_id *pci_id = *region_context;
 175         union acpi_operand_object *handler_obj;
 176         struct acpi_namespace_node *parent_node;
 177         struct acpi_namespace_node *pci_root_node;
 178         struct acpi_namespace_node *pci_device_node;
 179         union acpi_operand_object *region_obj =
 180             (union acpi_operand_object *)handle;
 181
 182         ACPI_FUNCTION_TRACE(ev_pci_config_region_setup);
 183
 184         handler_obj = region_obj->region.handler;
 185         if (!handler_obj) {
 186                 /*
 187                  * No installed handler. This shouldn't happen because the dispatch
 188                  * routine checks before we get here, but we check again just in case.
 189                  */
 190                 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
 191                                   "Attempting to init a region %p, with no handler\n",
 192                                   region_obj));
 193                 return_ACPI_STATUS(AE_NOT_EXIST);
 194         }
 195
 196         *region_context = NULL;
 197         if (function == ACPI_REGION_DEACTIVATE) {
 198                 if (pci_id) {
 199                         ACPI_FREE(pci_id);
 200                 }
 201                 return_ACPI_STATUS(status);
 202         }
 203
 204         parent_node = acpi_ns_get_parent_node(region_obj->region.node);
 205
 206         /*
 207          * Get the _SEG and _BBN values from the device upon which the handler
 208          * is installed.
 209          *
 210          * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
 211          * This is the device the handler has been registered to handle.
 212          */
 213
 214         /*
 215          * If the address_space.Node is still pointing to the root, we need
 216          * to scan upward for a PCI Root bridge and re-associate the op_region
 217          * handlers with that device.
 218          */
 219         if (handler_obj->address_space.node == acpi_gbl_root_node) {
 220
 221                 /* Start search from the parent object */
 222
 223                 pci_root_node = parent_node;
 224                 while (pci_root_node != acpi_gbl_root_node) {
 225
 226                         /* Get the _HID/_CID in order to detect a root_bridge */
 227
 228                         if (acpi_ev_is_pci_root_bridge(pci_root_node)) {
 229
 230                                 /* Install a handler for this PCI root bridge */
 231
 232                                 status =
 233                                     acpi_install_address_space_handler((acpi_handle) pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
 234                                 if (ACPI_FAILURE(status)) {
 235                                         if (status == AE_SAME_HANDLER) {
 236                                                 /*
 237                                                  * It is OK if the handler is already installed on the
 238                                                  * root bridge. Still need to return a context object
 239                                                  * for the new PCI_Config operation region, however.
 240                                                  */
 241                                                 status = AE_OK;
 242                                         } else {
 243                                                 ACPI_EXCEPTION((AE_INFO, status,
 244                                                                 "Could not install PciConfig handler "
 245                                                                 "for Root Bridge %4.4s",
 246                                                                 acpi_ut_get_node_name
 247                                                                 (pci_root_node)));
 248                                         }
 249                                 }
 250                                 break;
 251                         }
 252
 253                         pci_root_node = acpi_ns_get_parent_node(pci_root_node);
 254                 }
 255
 256                 /* PCI root bridge not found, use namespace root node */
 257         } else {
 258                 pci_root_node = handler_obj->address_space.node;
 259         }
 260
 261         /*
 262          * If this region is now initialized, we are done.
 263          * (install_address_space_handler could have initialized it)
 264          */
 265         if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
 266                 return_ACPI_STATUS(AE_OK);
 267         }
 268
 269         /* Region is still not initialized. Create a new context */
 270
 271         pci_id = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pci_id));
 272         if (!pci_id) {
 273                 return_ACPI_STATUS(AE_NO_MEMORY);
 274         }
 275
 276         /*
 277          * For PCI_Config space access, we need the segment, bus, device and
 278          * function numbers. Acquire them here.
 279          *
 280          * Find the parent device object. (This allows the operation region to be
 281          * within a subscope under the device, such as a control method.)
 282          */
 283         pci_device_node = region_obj->region.node;
 284         while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
 285                 pci_device_node = acpi_ns_get_parent_node(pci_device_node);
 286         }
 287
 288         if (!pci_device_node) {
 289                 ACPI_FREE(pci_id);
 290                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 291         }
 292
 293         /*
 294          * Get the PCI device and function numbers from the _ADR object contained
 295          * in the parent's scope.
 296          */
 297         status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR,
 298                                                  pci_device_node, &pci_value);
 299
 300         /*
 301          * The default is zero, and since the allocation above zeroed the data,
 302          * just do nothing on failure.
 303          */
 304         if (ACPI_SUCCESS(status)) {
 305                 pci_id->device = ACPI_HIWORD(ACPI_LODWORD(pci_value));
 306                 pci_id->function = ACPI_LOWORD(ACPI_LODWORD(pci_value));
 307         }
 308
 309         /* The PCI segment number comes from the _SEG method */
 310
 311         status = acpi_ut_evaluate_numeric_object(METHOD_NAME__SEG,
 312                                                  pci_root_node, &pci_value);
 313         if (ACPI_SUCCESS(status)) {
 314                 pci_id->segment = ACPI_LOWORD(pci_value);
 315         }
 316
 317         /* The PCI bus number comes from the _BBN method */
 318
 319         status = acpi_ut_evaluate_numeric_object(METHOD_NAME__BBN,
 320                                                  pci_root_node, &pci_value);
 321         if (ACPI_SUCCESS(status)) {
 322                 pci_id->bus = ACPI_LOWORD(pci_value);
 323         }
 324
 325         /* Complete this device's pci_id */
 326
 327         acpi_os_derive_pci_id(pci_root_node, region_obj->region.node, &pci_id);
 328
 329         *region_context = pci_id;
 330         return_ACPI_STATUS(AE_OK);
 331 }
 332
 333 /*******************************************************************************
 334  *
 335  * FUNCTION:    acpi_ev_match_pci_root_bridge
 336  *
 337  * PARAMETERS:  Id              - The HID/CID in string format
 338  *
 339  * RETURN:      TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
 340  *
 341  * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
 342  *
 343  ******************************************************************************/
 344
 345 static u8 acpi_ev_match_pci_root_bridge(char *id)
 346 {
 347
 348         /*
 349          * Check if this is a PCI root.
 350          * ACPI 3.0+: check for a PCI Express root also.
 351          */
 352         if (!(ACPI_STRNCMP(id,
 353                            PCI_ROOT_HID_STRING,
 354                            sizeof(PCI_ROOT_HID_STRING))) ||
 355             !(ACPI_STRNCMP(id,
 356                            PCI_EXPRESS_ROOT_HID_STRING,
 357                            sizeof(PCI_EXPRESS_ROOT_HID_STRING)))) {
 358                 return (TRUE);
 359         }
 360
 361         return (FALSE);
 362 }
 363
 364 /*******************************************************************************
 365  *
 366  * FUNCTION:    acpi_ev_is_pci_root_bridge
 367  *
 368  * PARAMETERS:  Node            - Device node being examined
 369  *
 370  * RETURN:      TRUE if device is a PCI/PCI-Express Root Bridge
 371  *
 372  * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
 373  *              examining the _HID and _CID for the device.
 374  *
 375  ******************************************************************************/
 376
 377 static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
 378 {
 379         acpi_status status;
 380         struct acpica_device_id hid;
 381         struct acpi_compatible_id_list *cid;
 382         u32 i;
 383
 384         /* Get the _HID and check for a PCI Root Bridge */
 385
 386         status = acpi_ut_execute_HID(node, &hid);
 387         if (ACPI_FAILURE(status)) {
 388                 return (FALSE);
 389         }
 390
 391         if (acpi_ev_match_pci_root_bridge(hid.value)) {
 392                 return (TRUE);
 393         }
 394
 395         /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */
 396
 397         status = acpi_ut_execute_CID(node, &cid);
 398         if (ACPI_FAILURE(status)) {
 399                 return (FALSE);
 400         }
 401
 402         /* Check all _CIDs in the returned list */
 403
 404         for (i = 0; i < cid->count; i++) {
 405                 if (acpi_ev_match_pci_root_bridge(cid->id[i].value)) {
 406                         ACPI_FREE(cid);
 407                         return (TRUE);
 408                 }
 409         }
 410
 411         ACPI_FREE(cid);
 412         return (FALSE);
 413 }
 414
 415 /*******************************************************************************
 416  *
 417  * FUNCTION:    acpi_ev_pci_bar_region_setup
 418  *
 419  * PARAMETERS:  Handle              - Region we are interested in
 420  *              Function            - Start or stop
 421  *              handler_context     - Address space handler context
 422  *              region_context      - Region specific context
 423  *
 424  * RETURN:      Status
 425  *
 426  * DESCRIPTION: Setup a pci_bAR operation region
 427  *
 428  * MUTEX:       Assumes namespace is not locked
 429  *
 430  ******************************************************************************/
 431
 432 acpi_status
 433 acpi_ev_pci_bar_region_setup(acpi_handle handle,
 434                              u32 function,
 435                              void *handler_context, void **region_context)
 436 {
 437         ACPI_FUNCTION_TRACE(ev_pci_bar_region_setup);
 438
 439         return_ACPI_STATUS(AE_OK);
 440 }
 441
 442 /*******************************************************************************
 443  *
 444  * FUNCTION:    acpi_ev_cmos_region_setup
 445  *
 446  * PARAMETERS:  Handle              - Region we are interested in
 447  *              Function            - Start or stop
 448  *              handler_context     - Address space handler context
 449  *              region_context      - Region specific context
 450  *
 451  * RETURN:      Status
 452  *
 453  * DESCRIPTION: Setup a CMOS operation region
 454  *
 455  * MUTEX:       Assumes namespace is not locked
 456  *
 457  ******************************************************************************/
 458
 459 acpi_status
 460 acpi_ev_cmos_region_setup(acpi_handle handle,
 461                           u32 function,
 462                           void *handler_context, void **region_context)
 463 {
 464         ACPI_FUNCTION_TRACE(ev_cmos_region_setup);
 465
 466         return_ACPI_STATUS(AE_OK);
 467 }
 468
 469 /*******************************************************************************
 470  *
 471  * FUNCTION:    acpi_ev_default_region_setup
 472  *
 473  * PARAMETERS:  Handle              - Region we are interested in
 474  *              Function            - Start or stop
 475  *              handler_context     - Address space handler context
 476  *              region_context      - Region specific context
 477  *
 478  * RETURN:      Status
 479  *
 480  * DESCRIPTION: Default region initialization
 481  *
 482  ******************************************************************************/
 483
 484 acpi_status
 485 acpi_ev_default_region_setup(acpi_handle handle,
 486                              u32 function,
 487                              void *handler_context, void **region_context)
 488 {
 489         ACPI_FUNCTION_TRACE(ev_default_region_setup);
 490
 491         if (function == ACPI_REGION_DEACTIVATE) {
 492                 *region_context = NULL;
 493         } else {
 494                 *region_context = handler_context;
 495         }
 496
 497         return_ACPI_STATUS(AE_OK);
 498 }
 499
 500 /*******************************************************************************
 501  *
 502  * FUNCTION:    acpi_ev_initialize_region
 503  *
 504  * PARAMETERS:  region_obj      - Region we are initializing
 505  *              acpi_ns_locked  - Is namespace locked?
 506  *
 507  * RETURN:      Status
 508  *
 509  * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
 510  *              for execution at a later time
 511  *
 512  *              Get the appropriate address space handler for a newly
 513  *              created region.
 514  *
 515  *              This also performs address space specific initialization. For
 516  *              example, PCI regions must have an _ADR object that contains
 517  *              a PCI address in the scope of the definition. This address is
 518  *              required to perform an access to PCI config space.
 519  *
 520  * MUTEX:       Interpreter should be unlocked, because we may run the _REG
 521  *              method for this region.
 522  *
 523  ******************************************************************************/
 524
 525 acpi_status
 526 acpi_ev_initialize_region(union acpi_operand_object *region_obj,
 527                           u8 acpi_ns_locked)
 528 {
 529         union acpi_operand_object *handler_obj;
 530         union acpi_operand_object *obj_desc;
 531         acpi_adr_space_type space_id;
 532         struct acpi_namespace_node *node;
 533         acpi_status status;
 534         struct acpi_namespace_node *method_node;
 535         acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
 536         union acpi_operand_object *region_obj2;
 537
 538         ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked);
 539
 540         if (!region_obj) {
 541                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 542         }
 543
 544         if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
 545                 return_ACPI_STATUS(AE_OK);
 546         }
 547
 548         region_obj2 = acpi_ns_get_secondary_object(region_obj);
 549         if (!region_obj2) {
 550                 return_ACPI_STATUS(AE_NOT_EXIST);
 551         }
 552
 553         node = acpi_ns_get_parent_node(region_obj->region.node);
 554         space_id = region_obj->region.space_id;
 555
 556         /* Setup defaults */
 557
 558         region_obj->region.handler = NULL;
 559         region_obj2->extra.method_REG = NULL;
 560         region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
 561         region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
 562
 563         /* Find any "_REG" method associated with this region definition */
 564
 565         status =
 566             acpi_ns_search_one_scope(*reg_name_ptr, node, ACPI_TYPE_METHOD,
 567                                      &method_node);
 568         if (ACPI_SUCCESS(status)) {
 569                 /*
 570                  * The _REG method is optional and there can be only one per region
 571                  * definition. This will be executed when the handler is attached
 572                  * or removed
 573                  */
 574                 region_obj2->extra.method_REG = method_node;
 575         }
 576
 577         /*
 578          * The following loop depends upon the root Node having no parent
 579          * ie: acpi_gbl_root_node->parent_entry being set to NULL
 580          */
 581         while (node) {
 582
 583                 /* Check to see if a handler exists */
 584
 585                 handler_obj = NULL;
 586                 obj_desc = acpi_ns_get_attached_object(node);
 587                 if (obj_desc) {
 588
 589                         /* Can only be a handler if the object exists */
 590
 591                         switch (node->type) {
 592                         case ACPI_TYPE_DEVICE:
 593
 594                                 handler_obj = obj_desc->device.handler;
 595                                 break;
 596
 597                         case ACPI_TYPE_PROCESSOR:
 598
 599                                 handler_obj = obj_desc->processor.handler;
 600                                 break;
 601
 602                         case ACPI_TYPE_THERMAL:
 603
 604                                 handler_obj = obj_desc->thermal_zone.handler;
 605                                 break;
 606
 607                         default:
 608                                 /* Ignore other objects */
 609                                 break;
 610                         }
 611
 612                         while (handler_obj) {
 613
 614                                 /* Is this handler of the correct type? */
 615
 616                                 if (handler_obj->address_space.space_id ==
 617                                     space_id) {
 618
 619                                         /* Found correct handler */
 620
 621                                         ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
 622                                                           "Found handler %p for region %p in obj %p\n",
 623                                                           handler_obj,
 624                                                           region_obj,
 625                                                           obj_desc));
 626
 627                                         status =
 628                                             acpi_ev_attach_region(handler_obj,
 629                                                                   region_obj,
 630                                                                   acpi_ns_locked);
 631
 632                                         /*
 633                                          * Tell all users that this region is usable by
 634                                          * running the _REG method
 635                                          */
 636                                         if (acpi_ns_locked) {
 637                                                 status =
 638                                                     acpi_ut_release_mutex
 639                                                     (ACPI_MTX_NAMESPACE);
 640                                                 if (ACPI_FAILURE(status)) {
 641                                                         return_ACPI_STATUS
 642                                                             (status);
 643                                                 }
 644                                         }
 645
 646                                         status =
 647                                             acpi_ev_execute_reg_method
 648                                             (region_obj, 1);
 649
 650                                         if (acpi_ns_locked) {
 651                                                 status =
 652                                                     acpi_ut_acquire_mutex
 653                                                     (ACPI_MTX_NAMESPACE);
 654                                                 if (ACPI_FAILURE(status)) {
 655                                                         return_ACPI_STATUS
 656                                                             (status);
 657                                                 }
 658                                         }
 659
 660                                         return_ACPI_STATUS(AE_OK);
 661                                 }
 662
 663                                 /* Try next handler in the list */
 664
 665                                 handler_obj = handler_obj->address_space.next;
 666                         }
 667                 }
 668
 669                 /* This node does not have the handler we need; Pop up one level */
 670
 671                 node = acpi_ns_get_parent_node(node);
 672         }
 673
 674         /* If we get here, there is no handler for this region */
 675
 676         ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
 677                           "No handler for RegionType %s(%X) (RegionObj %p)\n",
 678                           acpi_ut_get_region_name(space_id), space_id,
 679                           region_obj));
 680
 681         return_ACPI_STATUS(AE_NOT_EXIST);
 682 }