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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evregion - ACPI address_space (op_region) handler dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
50df4d8b | 45 | #include <acpi/accommon.h> |
1da177e4 LT |
46 | #include <acpi/acevents.h> |
47 | #include <acpi/acnamesp.h> | |
48 | #include <acpi/acinterp.h> | |
49 | ||
50 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 51 | ACPI_MODULE_NAME("evregion") |
1da177e4 | 52 | |
44f6c012 | 53 | /* Local prototypes */ |
44f6c012 | 54 | static acpi_status |
4be44fcd LB |
55 | acpi_ev_reg_run(acpi_handle obj_handle, |
56 | u32 level, void *context, void **return_value); | |
44f6c012 RM |
57 | |
58 | static acpi_status | |
4be44fcd LB |
59 | acpi_ev_install_handler(acpi_handle obj_handle, |
60 | u32 level, void *context, void **return_value); | |
1da177e4 | 61 | |
9f15fc66 BM |
62 | /* These are the address spaces that will get default handlers */ |
63 | ||
64 | #define ACPI_NUM_DEFAULT_SPACES 4 | |
65 | ||
66 | static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = { | |
67 | ACPI_ADR_SPACE_SYSTEM_MEMORY, | |
68 | ACPI_ADR_SPACE_SYSTEM_IO, | |
69 | ACPI_ADR_SPACE_PCI_CONFIG, | |
70 | ACPI_ADR_SPACE_DATA_TABLE | |
71 | }; | |
72 | ||
1da177e4 LT |
73 | /******************************************************************************* |
74 | * | |
75 | * FUNCTION: acpi_ev_install_region_handlers | |
76 | * | |
77 | * PARAMETERS: None | |
78 | * | |
79 | * RETURN: Status | |
80 | * | |
81 | * DESCRIPTION: Installs the core subsystem default address space handlers. | |
82 | * | |
83 | ******************************************************************************/ | |
84 | ||
4be44fcd LB |
85 | acpi_status acpi_ev_install_region_handlers(void) |
86 | { | |
87 | acpi_status status; | |
67a119f9 | 88 | u32 i; |
1da177e4 | 89 | |
b229cf92 | 90 | ACPI_FUNCTION_TRACE(ev_install_region_handlers); |
1da177e4 | 91 | |
4be44fcd LB |
92 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
93 | if (ACPI_FAILURE(status)) { | |
94 | return_ACPI_STATUS(status); | |
1da177e4 LT |
95 | } |
96 | ||
97 | /* | |
9f15fc66 BM |
98 | * All address spaces (PCI Config, EC, SMBus) are scope dependent and |
99 | * registration must occur for a specific device. | |
1da177e4 | 100 | * |
9f15fc66 BM |
101 | * In the case of the system memory and IO address spaces there is |
102 | * currently no device associated with the address space. For these we | |
103 | * use the root. | |
1da177e4 | 104 | * |
9f15fc66 BM |
105 | * We install the default PCI config space handler at the root so that |
106 | * this space is immediately available even though the we have not | |
107 | * enumerated all the PCI Root Buses yet. This is to conform to the ACPI | |
108 | * specification which states that the PCI config space must be always | |
109 | * available -- even though we are nowhere near ready to find the PCI root | |
110 | * buses at this point. | |
1da177e4 LT |
111 | * |
112 | * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler | |
113 | * has already been installed (via acpi_install_address_space_handler). | |
114 | * Similar for AE_SAME_HANDLER. | |
115 | */ | |
116 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { | |
4be44fcd LB |
117 | status = acpi_ev_install_space_handler(acpi_gbl_root_node, |
118 | acpi_gbl_default_address_spaces | |
119 | [i], | |
120 | ACPI_DEFAULT_HANDLER, | |
121 | NULL, NULL); | |
1da177e4 LT |
122 | switch (status) { |
123 | case AE_OK: | |
124 | case AE_SAME_HANDLER: | |
125 | case AE_ALREADY_EXISTS: | |
126 | ||
127 | /* These exceptions are all OK */ | |
128 | ||
129 | status = AE_OK; | |
130 | break; | |
131 | ||
132 | default: | |
133 | ||
134 | goto unlock_and_exit; | |
135 | } | |
136 | } | |
137 | ||
4be44fcd LB |
138 | unlock_and_exit: |
139 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
140 | return_ACPI_STATUS(status); | |
1da177e4 LT |
141 | } |
142 | ||
1da177e4 LT |
143 | /******************************************************************************* |
144 | * | |
145 | * FUNCTION: acpi_ev_initialize_op_regions | |
146 | * | |
147 | * PARAMETERS: None | |
148 | * | |
149 | * RETURN: Status | |
150 | * | |
151 | * DESCRIPTION: Execute _REG methods for all Operation Regions that have | |
152 | * an installed default region handler. | |
153 | * | |
154 | ******************************************************************************/ | |
155 | ||
4be44fcd | 156 | acpi_status acpi_ev_initialize_op_regions(void) |
1da177e4 | 157 | { |
4be44fcd | 158 | acpi_status status; |
67a119f9 | 159 | u32 i; |
1da177e4 | 160 | |
b229cf92 | 161 | ACPI_FUNCTION_TRACE(ev_initialize_op_regions); |
1da177e4 | 162 | |
4be44fcd LB |
163 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
164 | if (ACPI_FAILURE(status)) { | |
165 | return_ACPI_STATUS(status); | |
1da177e4 LT |
166 | } |
167 | ||
9f15fc66 | 168 | /* Run the _REG methods for op_regions in each default address space */ |
52fc0b02 | 169 | |
9f15fc66 BM |
170 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { |
171 | /* | |
172 | * TBD: Make sure handler is the DEFAULT handler, otherwise | |
1da177e4 LT |
173 | * _REG will have already been run. |
174 | */ | |
4be44fcd LB |
175 | status = acpi_ev_execute_reg_methods(acpi_gbl_root_node, |
176 | acpi_gbl_default_address_spaces | |
177 | [i]); | |
1da177e4 LT |
178 | } |
179 | ||
4be44fcd LB |
180 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
181 | return_ACPI_STATUS(status); | |
1da177e4 LT |
182 | } |
183 | ||
1da177e4 LT |
184 | /******************************************************************************* |
185 | * | |
186 | * FUNCTION: acpi_ev_execute_reg_method | |
187 | * | |
44f6c012 RM |
188 | * PARAMETERS: region_obj - Region object |
189 | * Function - Passed to _REG: On (1) or Off (0) | |
1da177e4 LT |
190 | * |
191 | * RETURN: Status | |
192 | * | |
193 | * DESCRIPTION: Execute _REG method for a region | |
194 | * | |
195 | ******************************************************************************/ | |
196 | ||
197 | acpi_status | |
4be44fcd | 198 | acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function) |
1da177e4 | 199 | { |
4119532c BM |
200 | struct acpi_evaluate_info *info; |
201 | union acpi_operand_object *args[3]; | |
4be44fcd LB |
202 | union acpi_operand_object *region_obj2; |
203 | acpi_status status; | |
1da177e4 | 204 | |
b229cf92 | 205 | ACPI_FUNCTION_TRACE(ev_execute_reg_method); |
1da177e4 | 206 | |
4be44fcd | 207 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 | 208 | if (!region_obj2) { |
4be44fcd | 209 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
210 | } |
211 | ||
212 | if (region_obj2->extra.method_REG == NULL) { | |
4be44fcd | 213 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
214 | } |
215 | ||
4119532c BM |
216 | /* Allocate and initialize the evaluation information block */ |
217 | ||
218 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
219 | if (!info) { | |
220 | return_ACPI_STATUS(AE_NO_MEMORY); | |
221 | } | |
222 | ||
223 | info->prefix_node = region_obj2->extra.method_REG; | |
224 | info->pathname = NULL; | |
225 | info->parameters = args; | |
4119532c BM |
226 | info->flags = ACPI_IGNORE_RETURN_VALUE; |
227 | ||
1da177e4 LT |
228 | /* |
229 | * The _REG method has two arguments: | |
230 | * | |
4119532c BM |
231 | * Arg0 - Integer: |
232 | * Operation region space ID Same value as region_obj->Region.space_id | |
233 | * | |
234 | * Arg1 - Integer: | |
235 | * connection status 1 for connecting the handler, 0 for disconnecting | |
236 | * the handler (Passed as a parameter) | |
1da177e4 | 237 | */ |
4119532c BM |
238 | args[0] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); |
239 | if (!args[0]) { | |
240 | status = AE_NO_MEMORY; | |
241 | goto cleanup1; | |
1da177e4 LT |
242 | } |
243 | ||
4119532c BM |
244 | args[1] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); |
245 | if (!args[1]) { | |
1da177e4 | 246 | status = AE_NO_MEMORY; |
4119532c | 247 | goto cleanup2; |
1da177e4 LT |
248 | } |
249 | ||
250 | /* Setup the parameter objects */ | |
251 | ||
4119532c BM |
252 | args[0]->integer.value = region_obj->region.space_id; |
253 | args[1]->integer.value = function; | |
254 | args[2] = NULL; | |
1da177e4 LT |
255 | |
256 | /* Execute the method, no return value */ | |
257 | ||
4be44fcd | 258 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
4119532c BM |
259 | (ACPI_TYPE_METHOD, info->prefix_node, NULL)); |
260 | ||
261 | status = acpi_ns_evaluate(info); | |
262 | acpi_ut_remove_reference(args[1]); | |
1da177e4 | 263 | |
4119532c BM |
264 | cleanup2: |
265 | acpi_ut_remove_reference(args[0]); | |
1da177e4 | 266 | |
4119532c BM |
267 | cleanup1: |
268 | ACPI_FREE(info); | |
4be44fcd | 269 | return_ACPI_STATUS(status); |
1da177e4 LT |
270 | } |
271 | ||
1da177e4 LT |
272 | /******************************************************************************* |
273 | * | |
274 | * FUNCTION: acpi_ev_address_space_dispatch | |
275 | * | |
276 | * PARAMETERS: region_obj - Internal region object | |
277 | * Function - Read or Write operation | |
278 | * Address - Where in the space to read or write | |
279 | * bit_width - Field width in bits (8, 16, 32, or 64) | |
958dd242 BM |
280 | * Value - Pointer to in or out value, must be |
281 | * full 64-bit acpi_integer | |
1da177e4 LT |
282 | * |
283 | * RETURN: Status | |
284 | * | |
285 | * DESCRIPTION: Dispatch an address space or operation region access to | |
286 | * a previously installed handler. | |
287 | * | |
288 | ******************************************************************************/ | |
289 | ||
290 | acpi_status | |
4be44fcd LB |
291 | acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, |
292 | u32 function, | |
293 | acpi_physical_address address, | |
958dd242 | 294 | u32 bit_width, acpi_integer * value) |
1da177e4 | 295 | { |
4be44fcd | 296 | acpi_status status; |
4be44fcd LB |
297 | acpi_adr_space_handler handler; |
298 | acpi_adr_space_setup region_setup; | |
299 | union acpi_operand_object *handler_desc; | |
300 | union acpi_operand_object *region_obj2; | |
301 | void *region_context = NULL; | |
1da177e4 | 302 | |
b229cf92 | 303 | ACPI_FUNCTION_TRACE(ev_address_space_dispatch); |
1da177e4 | 304 | |
4be44fcd | 305 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 | 306 | if (!region_obj2) { |
4be44fcd | 307 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
308 | } |
309 | ||
310 | /* Ensure that there is a handler associated with this region */ | |
311 | ||
312 | handler_desc = region_obj->region.handler; | |
313 | if (!handler_desc) { | |
b8e4d893 BM |
314 | ACPI_ERROR((AE_INFO, |
315 | "No handler for Region [%4.4s] (%p) [%s]", | |
316 | acpi_ut_get_node_name(region_obj->region.node), | |
317 | region_obj, | |
318 | acpi_ut_get_region_name(region_obj->region. | |
319 | space_id))); | |
4be44fcd LB |
320 | |
321 | return_ACPI_STATUS(AE_NOT_EXIST); | |
1da177e4 LT |
322 | } |
323 | ||
324 | /* | |
9f15fc66 | 325 | * It may be the case that the region has never been initialized. |
1da177e4 LT |
326 | * Some types of regions require special init code |
327 | */ | |
328 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { | |
9f15fc66 BM |
329 | |
330 | /* This region has not been initialized yet, do it */ | |
331 | ||
1da177e4 LT |
332 | region_setup = handler_desc->address_space.setup; |
333 | if (!region_setup) { | |
52fc0b02 | 334 | |
1da177e4 LT |
335 | /* No initialization routine, exit with error */ |
336 | ||
b8e4d893 BM |
337 | ACPI_ERROR((AE_INFO, |
338 | "No init routine for region(%p) [%s]", | |
339 | region_obj, | |
340 | acpi_ut_get_region_name(region_obj->region. | |
341 | space_id))); | |
4be44fcd | 342 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
343 | } |
344 | ||
345 | /* | |
9f15fc66 BM |
346 | * We must exit the interpreter because the region setup will |
347 | * potentially execute control methods (for example, the _REG method | |
348 | * for this region) | |
1da177e4 | 349 | */ |
014d433f | 350 | acpi_ex_exit_interpreter(); |
1da177e4 | 351 | |
4be44fcd LB |
352 | status = region_setup(region_obj, ACPI_REGION_ACTIVATE, |
353 | handler_desc->address_space.context, | |
354 | ®ion_context); | |
1da177e4 LT |
355 | |
356 | /* Re-enter the interpreter */ | |
357 | ||
014d433f | 358 | acpi_ex_enter_interpreter(); |
1da177e4 LT |
359 | |
360 | /* Check for failure of the Region Setup */ | |
361 | ||
4be44fcd | 362 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
363 | ACPI_EXCEPTION((AE_INFO, status, |
364 | "During region initialization: [%s]", | |
365 | acpi_ut_get_region_name(region_obj-> | |
366 | region. | |
367 | space_id))); | |
4be44fcd | 368 | return_ACPI_STATUS(status); |
1da177e4 LT |
369 | } |
370 | ||
9f15fc66 BM |
371 | /* Region initialization may have been completed by region_setup */ |
372 | ||
1da177e4 LT |
373 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { |
374 | region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; | |
375 | ||
376 | if (region_obj2->extra.region_context) { | |
52fc0b02 | 377 | |
1da177e4 LT |
378 | /* The handler for this region was already installed */ |
379 | ||
8313524a | 380 | ACPI_FREE(region_context); |
4be44fcd | 381 | } else { |
1da177e4 LT |
382 | /* |
383 | * Save the returned context for use in all accesses to | |
384 | * this particular region | |
385 | */ | |
4be44fcd LB |
386 | region_obj2->extra.region_context = |
387 | region_context; | |
1da177e4 LT |
388 | } |
389 | } | |
390 | } | |
391 | ||
392 | /* We have everything we need, we can invoke the address space handler */ | |
393 | ||
394 | handler = handler_desc->address_space.handler; | |
395 | ||
4be44fcd LB |
396 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
397 | "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", | |
398 | ®ion_obj->region.handler->address_space, handler, | |
1d18c058 | 399 | ACPI_FORMAT_NATIVE_UINT(address), |
4be44fcd LB |
400 | acpi_ut_get_region_name(region_obj->region. |
401 | space_id))); | |
1da177e4 | 402 | |
61686124 BM |
403 | if (!(handler_desc->address_space.handler_flags & |
404 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
1da177e4 LT |
405 | /* |
406 | * For handlers other than the default (supplied) handlers, we must | |
407 | * exit the interpreter because the handler *might* block -- we don't | |
408 | * know what it will do, so we can't hold the lock on the intepreter. | |
409 | */ | |
014d433f | 410 | acpi_ex_exit_interpreter(); |
1da177e4 LT |
411 | } |
412 | ||
413 | /* Call the handler */ | |
414 | ||
4be44fcd | 415 | status = handler(function, address, bit_width, value, |
1da177e4 LT |
416 | handler_desc->address_space.context, |
417 | region_obj2->extra.region_context); | |
418 | ||
4be44fcd | 419 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
420 | ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", |
421 | acpi_ut_get_region_name(region_obj->region. | |
422 | space_id))); | |
1da177e4 LT |
423 | } |
424 | ||
61686124 BM |
425 | if (!(handler_desc->address_space.handler_flags & |
426 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
1da177e4 LT |
427 | /* |
428 | * We just returned from a non-default handler, we must re-enter the | |
429 | * interpreter | |
430 | */ | |
014d433f | 431 | acpi_ex_enter_interpreter(); |
1da177e4 LT |
432 | } |
433 | ||
4be44fcd | 434 | return_ACPI_STATUS(status); |
1da177e4 LT |
435 | } |
436 | ||
1da177e4 LT |
437 | /******************************************************************************* |
438 | * | |
439 | * FUNCTION: acpi_ev_detach_region | |
440 | * | |
441 | * PARAMETERS: region_obj - Region Object | |
442 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
443 | * | |
444 | * RETURN: None | |
445 | * | |
446 | * DESCRIPTION: Break the association between the handler and the region | |
447 | * this is a two way association. | |
448 | * | |
449 | ******************************************************************************/ | |
450 | ||
451 | void | |
4be44fcd LB |
452 | acpi_ev_detach_region(union acpi_operand_object *region_obj, |
453 | u8 acpi_ns_is_locked) | |
1da177e4 | 454 | { |
4be44fcd LB |
455 | union acpi_operand_object *handler_obj; |
456 | union acpi_operand_object *obj_desc; | |
457 | union acpi_operand_object **last_obj_ptr; | |
458 | acpi_adr_space_setup region_setup; | |
459 | void **region_context; | |
460 | union acpi_operand_object *region_obj2; | |
461 | acpi_status status; | |
1da177e4 | 462 | |
b229cf92 | 463 | ACPI_FUNCTION_TRACE(ev_detach_region); |
1da177e4 | 464 | |
4be44fcd | 465 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 LT |
466 | if (!region_obj2) { |
467 | return_VOID; | |
468 | } | |
469 | region_context = ®ion_obj2->extra.region_context; | |
470 | ||
471 | /* Get the address handler from the region object */ | |
472 | ||
473 | handler_obj = region_obj->region.handler; | |
474 | if (!handler_obj) { | |
52fc0b02 | 475 | |
1da177e4 LT |
476 | /* This region has no handler, all done */ |
477 | ||
478 | return_VOID; | |
479 | } | |
480 | ||
481 | /* Find this region in the handler's list */ | |
482 | ||
483 | obj_desc = handler_obj->address_space.region_list; | |
484 | last_obj_ptr = &handler_obj->address_space.region_list; | |
485 | ||
486 | while (obj_desc) { | |
52fc0b02 | 487 | |
1da177e4 LT |
488 | /* Is this the correct Region? */ |
489 | ||
490 | if (obj_desc == region_obj) { | |
4be44fcd LB |
491 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
492 | "Removing Region %p from address handler %p\n", | |
493 | region_obj, handler_obj)); | |
1da177e4 LT |
494 | |
495 | /* This is it, remove it from the handler's list */ | |
496 | ||
497 | *last_obj_ptr = obj_desc->region.next; | |
4be44fcd | 498 | obj_desc->region.next = NULL; /* Must clear field */ |
1da177e4 LT |
499 | |
500 | if (acpi_ns_is_locked) { | |
4be44fcd LB |
501 | status = |
502 | acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
503 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
504 | return_VOID; |
505 | } | |
506 | } | |
507 | ||
508 | /* Now stop region accesses by executing the _REG method */ | |
509 | ||
4be44fcd LB |
510 | status = acpi_ev_execute_reg_method(region_obj, 0); |
511 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
512 | ACPI_EXCEPTION((AE_INFO, status, |
513 | "from region _REG, [%s]", | |
514 | acpi_ut_get_region_name | |
515 | (region_obj->region.space_id))); | |
1da177e4 LT |
516 | } |
517 | ||
518 | if (acpi_ns_is_locked) { | |
4be44fcd LB |
519 | status = |
520 | acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
521 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
522 | return_VOID; |
523 | } | |
524 | } | |
525 | ||
f6dd9221 | 526 | /* |
9f15fc66 BM |
527 | * If the region has been activated, call the setup handler with |
528 | * the deactivate notification | |
f6dd9221 BM |
529 | */ |
530 | if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) { | |
531 | region_setup = handler_obj->address_space.setup; | |
532 | status = | |
533 | region_setup(region_obj, | |
534 | ACPI_REGION_DEACTIVATE, | |
535 | handler_obj->address_space. | |
536 | context, region_context); | |
1da177e4 | 537 | |
f6dd9221 | 538 | /* Init routine may fail, Just ignore errors */ |
1da177e4 | 539 | |
f6dd9221 BM |
540 | if (ACPI_FAILURE(status)) { |
541 | ACPI_EXCEPTION((AE_INFO, status, | |
542 | "from region handler - deactivate, [%s]", | |
543 | acpi_ut_get_region_name | |
544 | (region_obj->region. | |
545 | space_id))); | |
546 | } | |
1da177e4 | 547 | |
f6dd9221 BM |
548 | region_obj->region.flags &= |
549 | ~(AOPOBJ_SETUP_COMPLETE); | |
1da177e4 LT |
550 | } |
551 | ||
1da177e4 LT |
552 | /* |
553 | * Remove handler reference in the region | |
554 | * | |
f6dd9221 BM |
555 | * NOTE: this doesn't mean that the region goes away, the region |
556 | * is just inaccessible as indicated to the _REG method | |
1da177e4 | 557 | * |
f6dd9221 BM |
558 | * If the region is on the handler's list, this must be the |
559 | * region's handler | |
1da177e4 LT |
560 | */ |
561 | region_obj->region.handler = NULL; | |
4be44fcd | 562 | acpi_ut_remove_reference(handler_obj); |
1da177e4 LT |
563 | |
564 | return_VOID; | |
565 | } | |
566 | ||
567 | /* Walk the linked list of handlers */ | |
568 | ||
569 | last_obj_ptr = &obj_desc->region.next; | |
570 | obj_desc = obj_desc->region.next; | |
571 | } | |
572 | ||
573 | /* If we get here, the region was not in the handler's region list */ | |
574 | ||
4be44fcd LB |
575 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
576 | "Cannot remove region %p from address handler %p\n", | |
577 | region_obj, handler_obj)); | |
1da177e4 LT |
578 | |
579 | return_VOID; | |
580 | } | |
581 | ||
1da177e4 LT |
582 | /******************************************************************************* |
583 | * | |
584 | * FUNCTION: acpi_ev_attach_region | |
585 | * | |
586 | * PARAMETERS: handler_obj - Handler Object | |
587 | * region_obj - Region Object | |
588 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
589 | * | |
590 | * RETURN: None | |
591 | * | |
592 | * DESCRIPTION: Create the association between the handler and the region | |
593 | * this is a two way association. | |
594 | * | |
595 | ******************************************************************************/ | |
596 | ||
597 | acpi_status | |
4be44fcd LB |
598 | acpi_ev_attach_region(union acpi_operand_object *handler_obj, |
599 | union acpi_operand_object *region_obj, | |
600 | u8 acpi_ns_is_locked) | |
1da177e4 LT |
601 | { |
602 | ||
b229cf92 | 603 | ACPI_FUNCTION_TRACE(ev_attach_region); |
1da177e4 | 604 | |
4be44fcd LB |
605 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
606 | "Adding Region [%4.4s] %p to address handler %p [%s]\n", | |
607 | acpi_ut_get_node_name(region_obj->region.node), | |
608 | region_obj, handler_obj, | |
609 | acpi_ut_get_region_name(region_obj->region. | |
610 | space_id))); | |
1da177e4 LT |
611 | |
612 | /* Link this region to the front of the handler's list */ | |
613 | ||
614 | region_obj->region.next = handler_obj->address_space.region_list; | |
615 | handler_obj->address_space.region_list = region_obj; | |
616 | ||
617 | /* Install the region's handler */ | |
618 | ||
619 | if (region_obj->region.handler) { | |
4be44fcd | 620 | return_ACPI_STATUS(AE_ALREADY_EXISTS); |
1da177e4 LT |
621 | } |
622 | ||
623 | region_obj->region.handler = handler_obj; | |
4be44fcd | 624 | acpi_ut_add_reference(handler_obj); |
1da177e4 | 625 | |
4be44fcd | 626 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
627 | } |
628 | ||
1da177e4 LT |
629 | /******************************************************************************* |
630 | * | |
631 | * FUNCTION: acpi_ev_install_handler | |
632 | * | |
633 | * PARAMETERS: walk_namespace callback | |
634 | * | |
635 | * DESCRIPTION: This routine installs an address handler into objects that are | |
636 | * of type Region or Device. | |
637 | * | |
638 | * If the Object is a Device, and the device has a handler of | |
639 | * the same type then the search is terminated in that branch. | |
640 | * | |
641 | * This is because the existing handler is closer in proximity | |
642 | * to any more regions than the one we are trying to install. | |
643 | * | |
644 | ******************************************************************************/ | |
645 | ||
44f6c012 | 646 | static acpi_status |
4be44fcd LB |
647 | acpi_ev_install_handler(acpi_handle obj_handle, |
648 | u32 level, void *context, void **return_value) | |
1da177e4 | 649 | { |
4be44fcd LB |
650 | union acpi_operand_object *handler_obj; |
651 | union acpi_operand_object *next_handler_obj; | |
652 | union acpi_operand_object *obj_desc; | |
653 | struct acpi_namespace_node *node; | |
654 | acpi_status status; | |
1da177e4 | 655 | |
b229cf92 | 656 | ACPI_FUNCTION_NAME(ev_install_handler); |
1da177e4 | 657 | |
4be44fcd | 658 | handler_obj = (union acpi_operand_object *)context; |
1da177e4 LT |
659 | |
660 | /* Parameter validation */ | |
661 | ||
662 | if (!handler_obj) { | |
663 | return (AE_OK); | |
664 | } | |
665 | ||
666 | /* Convert and validate the device handle */ | |
667 | ||
4be44fcd | 668 | node = acpi_ns_map_handle_to_node(obj_handle); |
1da177e4 LT |
669 | if (!node) { |
670 | return (AE_BAD_PARAMETER); | |
671 | } | |
672 | ||
673 | /* | |
9f15fc66 BM |
674 | * We only care about regions and objects that are allowed to have |
675 | * address space handlers | |
1da177e4 LT |
676 | */ |
677 | if ((node->type != ACPI_TYPE_DEVICE) && | |
4be44fcd | 678 | (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { |
1da177e4 LT |
679 | return (AE_OK); |
680 | } | |
681 | ||
682 | /* Check for an existing internal object */ | |
683 | ||
4be44fcd | 684 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 685 | if (!obj_desc) { |
52fc0b02 | 686 | |
1da177e4 LT |
687 | /* No object, just exit */ |
688 | ||
689 | return (AE_OK); | |
690 | } | |
691 | ||
692 | /* Devices are handled different than regions */ | |
693 | ||
4be44fcd | 694 | if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_DEVICE) { |
52fc0b02 | 695 | |
1da177e4 LT |
696 | /* Check if this Device already has a handler for this address space */ |
697 | ||
698 | next_handler_obj = obj_desc->device.handler; | |
699 | while (next_handler_obj) { | |
52fc0b02 | 700 | |
1da177e4 LT |
701 | /* Found a handler, is it for the same address space? */ |
702 | ||
4be44fcd LB |
703 | if (next_handler_obj->address_space.space_id == |
704 | handler_obj->address_space.space_id) { | |
705 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
706 | "Found handler for region [%s] in device %p(%p) handler %p\n", | |
707 | acpi_ut_get_region_name | |
708 | (handler_obj->address_space. | |
709 | space_id), obj_desc, | |
710 | next_handler_obj, | |
711 | handler_obj)); | |
1da177e4 LT |
712 | |
713 | /* | |
714 | * Since the object we found it on was a device, then it | |
715 | * means that someone has already installed a handler for | |
9f15fc66 | 716 | * the branch of the namespace from this device on. Just |
1da177e4 | 717 | * bail out telling the walk routine to not traverse this |
9f15fc66 | 718 | * branch. This preserves the scoping rule for handlers. |
1da177e4 LT |
719 | */ |
720 | return (AE_CTRL_DEPTH); | |
721 | } | |
722 | ||
723 | /* Walk the linked list of handlers attached to this device */ | |
724 | ||
725 | next_handler_obj = next_handler_obj->address_space.next; | |
726 | } | |
727 | ||
728 | /* | |
9f15fc66 BM |
729 | * As long as the device didn't have a handler for this space we |
730 | * don't care about it. We just ignore it and proceed. | |
1da177e4 LT |
731 | */ |
732 | return (AE_OK); | |
733 | } | |
734 | ||
735 | /* Object is a Region */ | |
736 | ||
737 | if (obj_desc->region.space_id != handler_obj->address_space.space_id) { | |
9f15fc66 BM |
738 | |
739 | /* This region is for a different address space, just ignore it */ | |
740 | ||
1da177e4 LT |
741 | return (AE_OK); |
742 | } | |
743 | ||
744 | /* | |
9f15fc66 | 745 | * Now we have a region and it is for the handler's address space type. |
1da177e4 LT |
746 | * |
747 | * First disconnect region for any previous handler (if any) | |
748 | */ | |
4be44fcd | 749 | acpi_ev_detach_region(obj_desc, FALSE); |
1da177e4 LT |
750 | |
751 | /* Connect the region to the new handler */ | |
752 | ||
4be44fcd | 753 | status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE); |
1da177e4 LT |
754 | return (status); |
755 | } | |
756 | ||
1da177e4 LT |
757 | /******************************************************************************* |
758 | * | |
759 | * FUNCTION: acpi_ev_install_space_handler | |
760 | * | |
761 | * PARAMETERS: Node - Namespace node for the device | |
762 | * space_id - The address space ID | |
763 | * Handler - Address of the handler | |
764 | * Setup - Address of the setup function | |
765 | * Context - Value passed to the handler on each access | |
766 | * | |
767 | * RETURN: Status | |
768 | * | |
769 | * DESCRIPTION: Install a handler for all op_regions of a given space_id. | |
770 | * Assumes namespace is locked | |
771 | * | |
772 | ******************************************************************************/ | |
773 | ||
774 | acpi_status | |
4be44fcd LB |
775 | acpi_ev_install_space_handler(struct acpi_namespace_node * node, |
776 | acpi_adr_space_type space_id, | |
777 | acpi_adr_space_handler handler, | |
778 | acpi_adr_space_setup setup, void *context) | |
1da177e4 | 779 | { |
4be44fcd LB |
780 | union acpi_operand_object *obj_desc; |
781 | union acpi_operand_object *handler_obj; | |
782 | acpi_status status; | |
783 | acpi_object_type type; | |
61686124 | 784 | u8 flags = 0; |
1da177e4 | 785 | |
b229cf92 | 786 | ACPI_FUNCTION_TRACE(ev_install_space_handler); |
1da177e4 LT |
787 | |
788 | /* | |
9f15fc66 BM |
789 | * This registration is valid for only the types below and the root. This |
790 | * is where the default handlers get placed. | |
1da177e4 | 791 | */ |
4be44fcd LB |
792 | if ((node->type != ACPI_TYPE_DEVICE) && |
793 | (node->type != ACPI_TYPE_PROCESSOR) && | |
794 | (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) { | |
1da177e4 LT |
795 | status = AE_BAD_PARAMETER; |
796 | goto unlock_and_exit; | |
797 | } | |
798 | ||
799 | if (handler == ACPI_DEFAULT_HANDLER) { | |
800 | flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; | |
801 | ||
802 | switch (space_id) { | |
803 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
804 | handler = acpi_ex_system_memory_space_handler; | |
4be44fcd | 805 | setup = acpi_ev_system_memory_region_setup; |
1da177e4 LT |
806 | break; |
807 | ||
808 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
809 | handler = acpi_ex_system_io_space_handler; | |
4be44fcd | 810 | setup = acpi_ev_io_space_region_setup; |
1da177e4 LT |
811 | break; |
812 | ||
813 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
814 | handler = acpi_ex_pci_config_space_handler; | |
4be44fcd | 815 | setup = acpi_ev_pci_config_region_setup; |
1da177e4 LT |
816 | break; |
817 | ||
818 | case ACPI_ADR_SPACE_CMOS: | |
819 | handler = acpi_ex_cmos_space_handler; | |
4be44fcd | 820 | setup = acpi_ev_cmos_region_setup; |
1da177e4 LT |
821 | break; |
822 | ||
823 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
824 | handler = acpi_ex_pci_bar_space_handler; | |
4be44fcd | 825 | setup = acpi_ev_pci_bar_region_setup; |
1da177e4 LT |
826 | break; |
827 | ||
828 | case ACPI_ADR_SPACE_DATA_TABLE: | |
829 | handler = acpi_ex_data_table_space_handler; | |
4be44fcd | 830 | setup = NULL; |
1da177e4 LT |
831 | break; |
832 | ||
833 | default: | |
834 | status = AE_BAD_PARAMETER; | |
835 | goto unlock_and_exit; | |
836 | } | |
837 | } | |
838 | ||
839 | /* If the caller hasn't specified a setup routine, use the default */ | |
840 | ||
841 | if (!setup) { | |
842 | setup = acpi_ev_default_region_setup; | |
843 | } | |
844 | ||
845 | /* Check for an existing internal object */ | |
846 | ||
4be44fcd | 847 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 LT |
848 | if (obj_desc) { |
849 | /* | |
9f15fc66 BM |
850 | * The attached device object already exists. Make sure the handler |
851 | * is not already installed. | |
1da177e4 LT |
852 | */ |
853 | handler_obj = obj_desc->device.handler; | |
854 | ||
855 | /* Walk the handler list for this device */ | |
856 | ||
857 | while (handler_obj) { | |
52fc0b02 | 858 | |
1da177e4 LT |
859 | /* Same space_id indicates a handler already installed */ |
860 | ||
861 | if (handler_obj->address_space.space_id == space_id) { | |
4be44fcd LB |
862 | if (handler_obj->address_space.handler == |
863 | handler) { | |
1da177e4 LT |
864 | /* |
865 | * It is (relatively) OK to attempt to install the SAME | |
9f15fc66 BM |
866 | * handler twice. This can easily happen with the |
867 | * PCI_Config space. | |
1da177e4 LT |
868 | */ |
869 | status = AE_SAME_HANDLER; | |
870 | goto unlock_and_exit; | |
4be44fcd | 871 | } else { |
1da177e4 LT |
872 | /* A handler is already installed */ |
873 | ||
874 | status = AE_ALREADY_EXISTS; | |
875 | } | |
876 | goto unlock_and_exit; | |
877 | } | |
878 | ||
879 | /* Walk the linked list of handlers */ | |
880 | ||
881 | handler_obj = handler_obj->address_space.next; | |
882 | } | |
4be44fcd LB |
883 | } else { |
884 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
885 | "Creating object on Device %p while installing handler\n", | |
886 | node)); | |
1da177e4 LT |
887 | |
888 | /* obj_desc does not exist, create one */ | |
889 | ||
890 | if (node->type == ACPI_TYPE_ANY) { | |
891 | type = ACPI_TYPE_DEVICE; | |
4be44fcd | 892 | } else { |
1da177e4 LT |
893 | type = node->type; |
894 | } | |
895 | ||
4be44fcd | 896 | obj_desc = acpi_ut_create_internal_object(type); |
1da177e4 LT |
897 | if (!obj_desc) { |
898 | status = AE_NO_MEMORY; | |
899 | goto unlock_and_exit; | |
900 | } | |
901 | ||
902 | /* Init new descriptor */ | |
903 | ||
904 | obj_desc->common.type = (u8) type; | |
905 | ||
906 | /* Attach the new object to the Node */ | |
907 | ||
4be44fcd | 908 | status = acpi_ns_attach_object(node, obj_desc, type); |
1da177e4 LT |
909 | |
910 | /* Remove local reference to the object */ | |
911 | ||
4be44fcd | 912 | acpi_ut_remove_reference(obj_desc); |
1da177e4 | 913 | |
4be44fcd | 914 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
915 | goto unlock_and_exit; |
916 | } | |
917 | } | |
918 | ||
4be44fcd LB |
919 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
920 | "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n", | |
921 | acpi_ut_get_region_name(space_id), space_id, | |
922 | acpi_ut_get_node_name(node), node, obj_desc)); | |
1da177e4 LT |
923 | |
924 | /* | |
925 | * Install the handler | |
926 | * | |
9f15fc66 BM |
927 | * At this point there is no existing handler. Just allocate the object |
928 | * for the handler and link it into the list. | |
1da177e4 | 929 | */ |
4be44fcd LB |
930 | handler_obj = |
931 | acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER); | |
1da177e4 LT |
932 | if (!handler_obj) { |
933 | status = AE_NO_MEMORY; | |
934 | goto unlock_and_exit; | |
935 | } | |
936 | ||
937 | /* Init handler obj */ | |
938 | ||
4be44fcd | 939 | handler_obj->address_space.space_id = (u8) space_id; |
61686124 | 940 | handler_obj->address_space.handler_flags = flags; |
1da177e4 | 941 | handler_obj->address_space.region_list = NULL; |
4be44fcd LB |
942 | handler_obj->address_space.node = node; |
943 | handler_obj->address_space.handler = handler; | |
944 | handler_obj->address_space.context = context; | |
945 | handler_obj->address_space.setup = setup; | |
1da177e4 LT |
946 | |
947 | /* Install at head of Device.address_space list */ | |
948 | ||
4be44fcd | 949 | handler_obj->address_space.next = obj_desc->device.handler; |
1da177e4 LT |
950 | |
951 | /* | |
952 | * The Device object is the first reference on the handler_obj. | |
953 | * Each region that uses the handler adds a reference. | |
954 | */ | |
955 | obj_desc->device.handler = handler_obj; | |
956 | ||
957 | /* | |
958 | * Walk the namespace finding all of the regions this | |
959 | * handler will manage. | |
960 | * | |
961 | * Start at the device and search the branch toward | |
962 | * the leaf nodes until either the leaf is encountered or | |
963 | * a device is detected that has an address handler of the | |
964 | * same type. | |
965 | * | |
966 | * In either case, back up and search down the remainder | |
967 | * of the branch | |
968 | */ | |
4be44fcd LB |
969 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, |
970 | ACPI_NS_WALK_UNLOCK, | |
971 | acpi_ev_install_handler, handler_obj, | |
972 | NULL); | |
1da177e4 | 973 | |
4be44fcd LB |
974 | unlock_and_exit: |
975 | return_ACPI_STATUS(status); | |
1da177e4 LT |
976 | } |
977 | ||
1da177e4 LT |
978 | /******************************************************************************* |
979 | * | |
980 | * FUNCTION: acpi_ev_execute_reg_methods | |
981 | * | |
982 | * PARAMETERS: Node - Namespace node for the device | |
983 | * space_id - The address space ID | |
984 | * | |
985 | * RETURN: Status | |
986 | * | |
987 | * DESCRIPTION: Run all _REG methods for the input Space ID; | |
988 | * Note: assumes namespace is locked, or system init time. | |
989 | * | |
990 | ******************************************************************************/ | |
991 | ||
992 | acpi_status | |
4be44fcd LB |
993 | acpi_ev_execute_reg_methods(struct acpi_namespace_node *node, |
994 | acpi_adr_space_type space_id) | |
1da177e4 | 995 | { |
4be44fcd | 996 | acpi_status status; |
1da177e4 | 997 | |
b229cf92 | 998 | ACPI_FUNCTION_TRACE(ev_execute_reg_methods); |
1da177e4 LT |
999 | |
1000 | /* | |
9f15fc66 BM |
1001 | * Run all _REG methods for all Operation Regions for this space ID. This |
1002 | * is a separate walk in order to handle any interdependencies between | |
1003 | * regions and _REG methods. (i.e. handlers must be installed for all | |
1004 | * regions of this Space ID before we can run any _REG methods) | |
1da177e4 | 1005 | */ |
4be44fcd LB |
1006 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, |
1007 | ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, | |
1008 | &space_id, NULL); | |
1da177e4 | 1009 | |
4be44fcd | 1010 | return_ACPI_STATUS(status); |
1da177e4 LT |
1011 | } |
1012 | ||
1da177e4 LT |
1013 | /******************************************************************************* |
1014 | * | |
1015 | * FUNCTION: acpi_ev_reg_run | |
1016 | * | |
1017 | * PARAMETERS: walk_namespace callback | |
1018 | * | |
958dd242 | 1019 | * DESCRIPTION: Run _REG method for region objects of the requested space_iD |
1da177e4 LT |
1020 | * |
1021 | ******************************************************************************/ | |
1022 | ||
44f6c012 | 1023 | static acpi_status |
4be44fcd LB |
1024 | acpi_ev_reg_run(acpi_handle obj_handle, |
1025 | u32 level, void *context, void **return_value) | |
1da177e4 | 1026 | { |
4be44fcd LB |
1027 | union acpi_operand_object *obj_desc; |
1028 | struct acpi_namespace_node *node; | |
1029 | acpi_adr_space_type space_id; | |
1030 | acpi_status status; | |
1da177e4 | 1031 | |
4be44fcd | 1032 | space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context); |
1da177e4 LT |
1033 | |
1034 | /* Convert and validate the device handle */ | |
1035 | ||
4be44fcd | 1036 | node = acpi_ns_map_handle_to_node(obj_handle); |
1da177e4 LT |
1037 | if (!node) { |
1038 | return (AE_BAD_PARAMETER); | |
1039 | } | |
1040 | ||
1041 | /* | |
9f15fc66 BM |
1042 | * We only care about regions.and objects that are allowed to have address |
1043 | * space handlers | |
1da177e4 | 1044 | */ |
4be44fcd | 1045 | if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { |
1da177e4 LT |
1046 | return (AE_OK); |
1047 | } | |
1048 | ||
1049 | /* Check for an existing internal object */ | |
1050 | ||
4be44fcd | 1051 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 1052 | if (!obj_desc) { |
52fc0b02 | 1053 | |
1da177e4 LT |
1054 | /* No object, just exit */ |
1055 | ||
1056 | return (AE_OK); | |
1057 | } | |
1058 | ||
1059 | /* Object is a Region */ | |
1060 | ||
1061 | if (obj_desc->region.space_id != space_id) { | |
9f15fc66 BM |
1062 | |
1063 | /* This region is for a different address space, just ignore it */ | |
1064 | ||
1da177e4 LT |
1065 | return (AE_OK); |
1066 | } | |
1067 | ||
4be44fcd | 1068 | status = acpi_ev_execute_reg_method(obj_desc, 1); |
1da177e4 LT |
1069 | return (status); |
1070 | } |