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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> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
48 | #include "acinterp.h" | |
1da177e4 LT |
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 | |
f5407af3 | 278 | * region_offset - Where in the region to read or write |
1da177e4 | 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, | |
f5407af3 | 293 | u32 region_offset, |
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, | |
f5407af3 BM |
399 | ACPI_FORMAT_NATIVE_UINT(region_obj->region.address + |
400 | region_offset), | |
4be44fcd LB |
401 | acpi_ut_get_region_name(region_obj->region. |
402 | space_id))); | |
1da177e4 | 403 | |
61686124 BM |
404 | if (!(handler_desc->address_space.handler_flags & |
405 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
1da177e4 LT |
406 | /* |
407 | * For handlers other than the default (supplied) handlers, we must | |
408 | * exit the interpreter because the handler *might* block -- we don't | |
409 | * know what it will do, so we can't hold the lock on the intepreter. | |
410 | */ | |
014d433f | 411 | acpi_ex_exit_interpreter(); |
1da177e4 LT |
412 | } |
413 | ||
414 | /* Call the handler */ | |
415 | ||
f5407af3 BM |
416 | status = handler(function, |
417 | (region_obj->region.address + region_offset), | |
418 | bit_width, value, handler_desc->address_space.context, | |
1da177e4 LT |
419 | region_obj2->extra.region_context); |
420 | ||
4be44fcd | 421 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
422 | ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", |
423 | acpi_ut_get_region_name(region_obj->region. | |
424 | space_id))); | |
1da177e4 LT |
425 | } |
426 | ||
61686124 BM |
427 | if (!(handler_desc->address_space.handler_flags & |
428 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
1da177e4 LT |
429 | /* |
430 | * We just returned from a non-default handler, we must re-enter the | |
431 | * interpreter | |
432 | */ | |
014d433f | 433 | acpi_ex_enter_interpreter(); |
1da177e4 LT |
434 | } |
435 | ||
4be44fcd | 436 | return_ACPI_STATUS(status); |
1da177e4 LT |
437 | } |
438 | ||
1da177e4 LT |
439 | /******************************************************************************* |
440 | * | |
441 | * FUNCTION: acpi_ev_detach_region | |
442 | * | |
443 | * PARAMETERS: region_obj - Region Object | |
444 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
445 | * | |
446 | * RETURN: None | |
447 | * | |
448 | * DESCRIPTION: Break the association between the handler and the region | |
449 | * this is a two way association. | |
450 | * | |
451 | ******************************************************************************/ | |
452 | ||
453 | void | |
4be44fcd LB |
454 | acpi_ev_detach_region(union acpi_operand_object *region_obj, |
455 | u8 acpi_ns_is_locked) | |
1da177e4 | 456 | { |
4be44fcd LB |
457 | union acpi_operand_object *handler_obj; |
458 | union acpi_operand_object *obj_desc; | |
459 | union acpi_operand_object **last_obj_ptr; | |
460 | acpi_adr_space_setup region_setup; | |
461 | void **region_context; | |
462 | union acpi_operand_object *region_obj2; | |
463 | acpi_status status; | |
1da177e4 | 464 | |
b229cf92 | 465 | ACPI_FUNCTION_TRACE(ev_detach_region); |
1da177e4 | 466 | |
4be44fcd | 467 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 LT |
468 | if (!region_obj2) { |
469 | return_VOID; | |
470 | } | |
471 | region_context = ®ion_obj2->extra.region_context; | |
472 | ||
473 | /* Get the address handler from the region object */ | |
474 | ||
475 | handler_obj = region_obj->region.handler; | |
476 | if (!handler_obj) { | |
52fc0b02 | 477 | |
1da177e4 LT |
478 | /* This region has no handler, all done */ |
479 | ||
480 | return_VOID; | |
481 | } | |
482 | ||
483 | /* Find this region in the handler's list */ | |
484 | ||
485 | obj_desc = handler_obj->address_space.region_list; | |
486 | last_obj_ptr = &handler_obj->address_space.region_list; | |
487 | ||
488 | while (obj_desc) { | |
52fc0b02 | 489 | |
1da177e4 LT |
490 | /* Is this the correct Region? */ |
491 | ||
492 | if (obj_desc == region_obj) { | |
4be44fcd LB |
493 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
494 | "Removing Region %p from address handler %p\n", | |
495 | region_obj, handler_obj)); | |
1da177e4 LT |
496 | |
497 | /* This is it, remove it from the handler's list */ | |
498 | ||
499 | *last_obj_ptr = obj_desc->region.next; | |
4be44fcd | 500 | obj_desc->region.next = NULL; /* Must clear field */ |
1da177e4 LT |
501 | |
502 | if (acpi_ns_is_locked) { | |
4be44fcd LB |
503 | status = |
504 | acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
505 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
506 | return_VOID; |
507 | } | |
508 | } | |
509 | ||
510 | /* Now stop region accesses by executing the _REG method */ | |
511 | ||
4be44fcd LB |
512 | status = acpi_ev_execute_reg_method(region_obj, 0); |
513 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
514 | ACPI_EXCEPTION((AE_INFO, status, |
515 | "from region _REG, [%s]", | |
516 | acpi_ut_get_region_name | |
517 | (region_obj->region.space_id))); | |
1da177e4 LT |
518 | } |
519 | ||
520 | if (acpi_ns_is_locked) { | |
4be44fcd LB |
521 | status = |
522 | acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
523 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
524 | return_VOID; |
525 | } | |
526 | } | |
527 | ||
f6dd9221 | 528 | /* |
9f15fc66 BM |
529 | * If the region has been activated, call the setup handler with |
530 | * the deactivate notification | |
f6dd9221 BM |
531 | */ |
532 | if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) { | |
533 | region_setup = handler_obj->address_space.setup; | |
534 | status = | |
535 | region_setup(region_obj, | |
536 | ACPI_REGION_DEACTIVATE, | |
537 | handler_obj->address_space. | |
538 | context, region_context); | |
1da177e4 | 539 | |
f6dd9221 | 540 | /* Init routine may fail, Just ignore errors */ |
1da177e4 | 541 | |
f6dd9221 BM |
542 | if (ACPI_FAILURE(status)) { |
543 | ACPI_EXCEPTION((AE_INFO, status, | |
544 | "from region handler - deactivate, [%s]", | |
545 | acpi_ut_get_region_name | |
546 | (region_obj->region. | |
547 | space_id))); | |
548 | } | |
1da177e4 | 549 | |
f6dd9221 BM |
550 | region_obj->region.flags &= |
551 | ~(AOPOBJ_SETUP_COMPLETE); | |
1da177e4 LT |
552 | } |
553 | ||
1da177e4 LT |
554 | /* |
555 | * Remove handler reference in the region | |
556 | * | |
f6dd9221 BM |
557 | * NOTE: this doesn't mean that the region goes away, the region |
558 | * is just inaccessible as indicated to the _REG method | |
1da177e4 | 559 | * |
f6dd9221 BM |
560 | * If the region is on the handler's list, this must be the |
561 | * region's handler | |
1da177e4 LT |
562 | */ |
563 | region_obj->region.handler = NULL; | |
4be44fcd | 564 | acpi_ut_remove_reference(handler_obj); |
1da177e4 LT |
565 | |
566 | return_VOID; | |
567 | } | |
568 | ||
569 | /* Walk the linked list of handlers */ | |
570 | ||
571 | last_obj_ptr = &obj_desc->region.next; | |
572 | obj_desc = obj_desc->region.next; | |
573 | } | |
574 | ||
575 | /* If we get here, the region was not in the handler's region list */ | |
576 | ||
4be44fcd LB |
577 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
578 | "Cannot remove region %p from address handler %p\n", | |
579 | region_obj, handler_obj)); | |
1da177e4 LT |
580 | |
581 | return_VOID; | |
582 | } | |
583 | ||
1da177e4 LT |
584 | /******************************************************************************* |
585 | * | |
586 | * FUNCTION: acpi_ev_attach_region | |
587 | * | |
588 | * PARAMETERS: handler_obj - Handler Object | |
589 | * region_obj - Region Object | |
590 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
591 | * | |
592 | * RETURN: None | |
593 | * | |
594 | * DESCRIPTION: Create the association between the handler and the region | |
595 | * this is a two way association. | |
596 | * | |
597 | ******************************************************************************/ | |
598 | ||
599 | acpi_status | |
4be44fcd LB |
600 | acpi_ev_attach_region(union acpi_operand_object *handler_obj, |
601 | union acpi_operand_object *region_obj, | |
602 | u8 acpi_ns_is_locked) | |
1da177e4 LT |
603 | { |
604 | ||
b229cf92 | 605 | ACPI_FUNCTION_TRACE(ev_attach_region); |
1da177e4 | 606 | |
4be44fcd LB |
607 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
608 | "Adding Region [%4.4s] %p to address handler %p [%s]\n", | |
609 | acpi_ut_get_node_name(region_obj->region.node), | |
610 | region_obj, handler_obj, | |
611 | acpi_ut_get_region_name(region_obj->region. | |
612 | space_id))); | |
1da177e4 LT |
613 | |
614 | /* Link this region to the front of the handler's list */ | |
615 | ||
616 | region_obj->region.next = handler_obj->address_space.region_list; | |
617 | handler_obj->address_space.region_list = region_obj; | |
618 | ||
619 | /* Install the region's handler */ | |
620 | ||
621 | if (region_obj->region.handler) { | |
4be44fcd | 622 | return_ACPI_STATUS(AE_ALREADY_EXISTS); |
1da177e4 LT |
623 | } |
624 | ||
625 | region_obj->region.handler = handler_obj; | |
4be44fcd | 626 | acpi_ut_add_reference(handler_obj); |
1da177e4 | 627 | |
4be44fcd | 628 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
629 | } |
630 | ||
1da177e4 LT |
631 | /******************************************************************************* |
632 | * | |
633 | * FUNCTION: acpi_ev_install_handler | |
634 | * | |
635 | * PARAMETERS: walk_namespace callback | |
636 | * | |
637 | * DESCRIPTION: This routine installs an address handler into objects that are | |
638 | * of type Region or Device. | |
639 | * | |
640 | * If the Object is a Device, and the device has a handler of | |
641 | * the same type then the search is terminated in that branch. | |
642 | * | |
643 | * This is because the existing handler is closer in proximity | |
644 | * to any more regions than the one we are trying to install. | |
645 | * | |
646 | ******************************************************************************/ | |
647 | ||
44f6c012 | 648 | static acpi_status |
4be44fcd LB |
649 | acpi_ev_install_handler(acpi_handle obj_handle, |
650 | u32 level, void *context, void **return_value) | |
1da177e4 | 651 | { |
4be44fcd LB |
652 | union acpi_operand_object *handler_obj; |
653 | union acpi_operand_object *next_handler_obj; | |
654 | union acpi_operand_object *obj_desc; | |
655 | struct acpi_namespace_node *node; | |
656 | acpi_status status; | |
1da177e4 | 657 | |
b229cf92 | 658 | ACPI_FUNCTION_NAME(ev_install_handler); |
1da177e4 | 659 | |
4be44fcd | 660 | handler_obj = (union acpi_operand_object *)context; |
1da177e4 LT |
661 | |
662 | /* Parameter validation */ | |
663 | ||
664 | if (!handler_obj) { | |
665 | return (AE_OK); | |
666 | } | |
667 | ||
668 | /* Convert and validate the device handle */ | |
669 | ||
4be44fcd | 670 | node = acpi_ns_map_handle_to_node(obj_handle); |
1da177e4 LT |
671 | if (!node) { |
672 | return (AE_BAD_PARAMETER); | |
673 | } | |
674 | ||
675 | /* | |
9f15fc66 BM |
676 | * We only care about regions and objects that are allowed to have |
677 | * address space handlers | |
1da177e4 LT |
678 | */ |
679 | if ((node->type != ACPI_TYPE_DEVICE) && | |
4be44fcd | 680 | (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { |
1da177e4 LT |
681 | return (AE_OK); |
682 | } | |
683 | ||
684 | /* Check for an existing internal object */ | |
685 | ||
4be44fcd | 686 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 687 | if (!obj_desc) { |
52fc0b02 | 688 | |
1da177e4 LT |
689 | /* No object, just exit */ |
690 | ||
691 | return (AE_OK); | |
692 | } | |
693 | ||
694 | /* Devices are handled different than regions */ | |
695 | ||
3371c19c | 696 | if (obj_desc->common.type == ACPI_TYPE_DEVICE) { |
52fc0b02 | 697 | |
1da177e4 LT |
698 | /* Check if this Device already has a handler for this address space */ |
699 | ||
700 | next_handler_obj = obj_desc->device.handler; | |
701 | while (next_handler_obj) { | |
52fc0b02 | 702 | |
1da177e4 LT |
703 | /* Found a handler, is it for the same address space? */ |
704 | ||
4be44fcd LB |
705 | if (next_handler_obj->address_space.space_id == |
706 | handler_obj->address_space.space_id) { | |
707 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
d4913dc6 BM |
708 | "Found handler for region [%s] in device %p(%p) " |
709 | "handler %p\n", | |
4be44fcd LB |
710 | acpi_ut_get_region_name |
711 | (handler_obj->address_space. | |
712 | space_id), obj_desc, | |
713 | next_handler_obj, | |
714 | handler_obj)); | |
1da177e4 LT |
715 | |
716 | /* | |
717 | * Since the object we found it on was a device, then it | |
718 | * means that someone has already installed a handler for | |
9f15fc66 | 719 | * the branch of the namespace from this device on. Just |
1da177e4 | 720 | * bail out telling the walk routine to not traverse this |
9f15fc66 | 721 | * branch. This preserves the scoping rule for handlers. |
1da177e4 LT |
722 | */ |
723 | return (AE_CTRL_DEPTH); | |
724 | } | |
725 | ||
726 | /* Walk the linked list of handlers attached to this device */ | |
727 | ||
728 | next_handler_obj = next_handler_obj->address_space.next; | |
729 | } | |
730 | ||
731 | /* | |
9f15fc66 BM |
732 | * As long as the device didn't have a handler for this space we |
733 | * don't care about it. We just ignore it and proceed. | |
1da177e4 LT |
734 | */ |
735 | return (AE_OK); | |
736 | } | |
737 | ||
738 | /* Object is a Region */ | |
739 | ||
740 | if (obj_desc->region.space_id != handler_obj->address_space.space_id) { | |
9f15fc66 BM |
741 | |
742 | /* This region is for a different address space, just ignore it */ | |
743 | ||
1da177e4 LT |
744 | return (AE_OK); |
745 | } | |
746 | ||
747 | /* | |
9f15fc66 | 748 | * Now we have a region and it is for the handler's address space type. |
1da177e4 LT |
749 | * |
750 | * First disconnect region for any previous handler (if any) | |
751 | */ | |
4be44fcd | 752 | acpi_ev_detach_region(obj_desc, FALSE); |
1da177e4 LT |
753 | |
754 | /* Connect the region to the new handler */ | |
755 | ||
4be44fcd | 756 | status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE); |
1da177e4 LT |
757 | return (status); |
758 | } | |
759 | ||
1da177e4 LT |
760 | /******************************************************************************* |
761 | * | |
762 | * FUNCTION: acpi_ev_install_space_handler | |
763 | * | |
764 | * PARAMETERS: Node - Namespace node for the device | |
765 | * space_id - The address space ID | |
766 | * Handler - Address of the handler | |
767 | * Setup - Address of the setup function | |
768 | * Context - Value passed to the handler on each access | |
769 | * | |
770 | * RETURN: Status | |
771 | * | |
772 | * DESCRIPTION: Install a handler for all op_regions of a given space_id. | |
773 | * Assumes namespace is locked | |
774 | * | |
775 | ******************************************************************************/ | |
776 | ||
777 | acpi_status | |
4be44fcd LB |
778 | acpi_ev_install_space_handler(struct acpi_namespace_node * node, |
779 | acpi_adr_space_type space_id, | |
780 | acpi_adr_space_handler handler, | |
781 | acpi_adr_space_setup setup, void *context) | |
1da177e4 | 782 | { |
4be44fcd LB |
783 | union acpi_operand_object *obj_desc; |
784 | union acpi_operand_object *handler_obj; | |
785 | acpi_status status; | |
786 | acpi_object_type type; | |
61686124 | 787 | u8 flags = 0; |
1da177e4 | 788 | |
b229cf92 | 789 | ACPI_FUNCTION_TRACE(ev_install_space_handler); |
1da177e4 LT |
790 | |
791 | /* | |
9f15fc66 BM |
792 | * This registration is valid for only the types below and the root. This |
793 | * is where the default handlers get placed. | |
1da177e4 | 794 | */ |
4be44fcd LB |
795 | if ((node->type != ACPI_TYPE_DEVICE) && |
796 | (node->type != ACPI_TYPE_PROCESSOR) && | |
797 | (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) { | |
1da177e4 LT |
798 | status = AE_BAD_PARAMETER; |
799 | goto unlock_and_exit; | |
800 | } | |
801 | ||
802 | if (handler == ACPI_DEFAULT_HANDLER) { | |
803 | flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; | |
804 | ||
805 | switch (space_id) { | |
806 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
807 | handler = acpi_ex_system_memory_space_handler; | |
4be44fcd | 808 | setup = acpi_ev_system_memory_region_setup; |
1da177e4 LT |
809 | break; |
810 | ||
811 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
812 | handler = acpi_ex_system_io_space_handler; | |
4be44fcd | 813 | setup = acpi_ev_io_space_region_setup; |
1da177e4 LT |
814 | break; |
815 | ||
816 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
817 | handler = acpi_ex_pci_config_space_handler; | |
4be44fcd | 818 | setup = acpi_ev_pci_config_region_setup; |
1da177e4 LT |
819 | break; |
820 | ||
821 | case ACPI_ADR_SPACE_CMOS: | |
822 | handler = acpi_ex_cmos_space_handler; | |
4be44fcd | 823 | setup = acpi_ev_cmos_region_setup; |
1da177e4 LT |
824 | break; |
825 | ||
826 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
827 | handler = acpi_ex_pci_bar_space_handler; | |
4be44fcd | 828 | setup = acpi_ev_pci_bar_region_setup; |
1da177e4 LT |
829 | break; |
830 | ||
831 | case ACPI_ADR_SPACE_DATA_TABLE: | |
832 | handler = acpi_ex_data_table_space_handler; | |
4be44fcd | 833 | setup = NULL; |
1da177e4 LT |
834 | break; |
835 | ||
836 | default: | |
837 | status = AE_BAD_PARAMETER; | |
838 | goto unlock_and_exit; | |
839 | } | |
840 | } | |
841 | ||
842 | /* If the caller hasn't specified a setup routine, use the default */ | |
843 | ||
844 | if (!setup) { | |
845 | setup = acpi_ev_default_region_setup; | |
846 | } | |
847 | ||
848 | /* Check for an existing internal object */ | |
849 | ||
4be44fcd | 850 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 LT |
851 | if (obj_desc) { |
852 | /* | |
9f15fc66 BM |
853 | * The attached device object already exists. Make sure the handler |
854 | * is not already installed. | |
1da177e4 LT |
855 | */ |
856 | handler_obj = obj_desc->device.handler; | |
857 | ||
858 | /* Walk the handler list for this device */ | |
859 | ||
860 | while (handler_obj) { | |
52fc0b02 | 861 | |
1da177e4 LT |
862 | /* Same space_id indicates a handler already installed */ |
863 | ||
864 | if (handler_obj->address_space.space_id == space_id) { | |
4be44fcd LB |
865 | if (handler_obj->address_space.handler == |
866 | handler) { | |
1da177e4 LT |
867 | /* |
868 | * It is (relatively) OK to attempt to install the SAME | |
9f15fc66 BM |
869 | * handler twice. This can easily happen with the |
870 | * PCI_Config space. | |
1da177e4 LT |
871 | */ |
872 | status = AE_SAME_HANDLER; | |
873 | goto unlock_and_exit; | |
4be44fcd | 874 | } else { |
1da177e4 LT |
875 | /* A handler is already installed */ |
876 | ||
877 | status = AE_ALREADY_EXISTS; | |
878 | } | |
879 | goto unlock_and_exit; | |
880 | } | |
881 | ||
882 | /* Walk the linked list of handlers */ | |
883 | ||
884 | handler_obj = handler_obj->address_space.next; | |
885 | } | |
4be44fcd LB |
886 | } else { |
887 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
888 | "Creating object on Device %p while installing handler\n", | |
889 | node)); | |
1da177e4 LT |
890 | |
891 | /* obj_desc does not exist, create one */ | |
892 | ||
893 | if (node->type == ACPI_TYPE_ANY) { | |
894 | type = ACPI_TYPE_DEVICE; | |
4be44fcd | 895 | } else { |
1da177e4 LT |
896 | type = node->type; |
897 | } | |
898 | ||
4be44fcd | 899 | obj_desc = acpi_ut_create_internal_object(type); |
1da177e4 LT |
900 | if (!obj_desc) { |
901 | status = AE_NO_MEMORY; | |
902 | goto unlock_and_exit; | |
903 | } | |
904 | ||
905 | /* Init new descriptor */ | |
906 | ||
907 | obj_desc->common.type = (u8) type; | |
908 | ||
909 | /* Attach the new object to the Node */ | |
910 | ||
4be44fcd | 911 | status = acpi_ns_attach_object(node, obj_desc, type); |
1da177e4 LT |
912 | |
913 | /* Remove local reference to the object */ | |
914 | ||
4be44fcd | 915 | acpi_ut_remove_reference(obj_desc); |
1da177e4 | 916 | |
4be44fcd | 917 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
918 | goto unlock_and_exit; |
919 | } | |
920 | } | |
921 | ||
4be44fcd LB |
922 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
923 | "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n", | |
924 | acpi_ut_get_region_name(space_id), space_id, | |
925 | acpi_ut_get_node_name(node), node, obj_desc)); | |
1da177e4 LT |
926 | |
927 | /* | |
928 | * Install the handler | |
929 | * | |
9f15fc66 BM |
930 | * At this point there is no existing handler. Just allocate the object |
931 | * for the handler and link it into the list. | |
1da177e4 | 932 | */ |
4be44fcd LB |
933 | handler_obj = |
934 | acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER); | |
1da177e4 LT |
935 | if (!handler_obj) { |
936 | status = AE_NO_MEMORY; | |
937 | goto unlock_and_exit; | |
938 | } | |
939 | ||
940 | /* Init handler obj */ | |
941 | ||
4be44fcd | 942 | handler_obj->address_space.space_id = (u8) space_id; |
61686124 | 943 | handler_obj->address_space.handler_flags = flags; |
1da177e4 | 944 | handler_obj->address_space.region_list = NULL; |
4be44fcd LB |
945 | handler_obj->address_space.node = node; |
946 | handler_obj->address_space.handler = handler; | |
947 | handler_obj->address_space.context = context; | |
948 | handler_obj->address_space.setup = setup; | |
1da177e4 LT |
949 | |
950 | /* Install at head of Device.address_space list */ | |
951 | ||
4be44fcd | 952 | handler_obj->address_space.next = obj_desc->device.handler; |
1da177e4 LT |
953 | |
954 | /* | |
955 | * The Device object is the first reference on the handler_obj. | |
956 | * Each region that uses the handler adds a reference. | |
957 | */ | |
958 | obj_desc->device.handler = handler_obj; | |
959 | ||
960 | /* | |
961 | * Walk the namespace finding all of the regions this | |
962 | * handler will manage. | |
963 | * | |
964 | * Start at the device and search the branch toward | |
965 | * the leaf nodes until either the leaf is encountered or | |
966 | * a device is detected that has an address handler of the | |
967 | * same type. | |
968 | * | |
969 | * In either case, back up and search down the remainder | |
970 | * of the branch | |
971 | */ | |
4be44fcd LB |
972 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, |
973 | ACPI_NS_WALK_UNLOCK, | |
974 | acpi_ev_install_handler, handler_obj, | |
975 | NULL); | |
1da177e4 | 976 | |
4be44fcd LB |
977 | unlock_and_exit: |
978 | return_ACPI_STATUS(status); | |
1da177e4 LT |
979 | } |
980 | ||
1da177e4 LT |
981 | /******************************************************************************* |
982 | * | |
983 | * FUNCTION: acpi_ev_execute_reg_methods | |
984 | * | |
985 | * PARAMETERS: Node - Namespace node for the device | |
986 | * space_id - The address space ID | |
987 | * | |
988 | * RETURN: Status | |
989 | * | |
990 | * DESCRIPTION: Run all _REG methods for the input Space ID; | |
991 | * Note: assumes namespace is locked, or system init time. | |
992 | * | |
993 | ******************************************************************************/ | |
994 | ||
995 | acpi_status | |
4be44fcd LB |
996 | acpi_ev_execute_reg_methods(struct acpi_namespace_node *node, |
997 | acpi_adr_space_type space_id) | |
1da177e4 | 998 | { |
4be44fcd | 999 | acpi_status status; |
1da177e4 | 1000 | |
b229cf92 | 1001 | ACPI_FUNCTION_TRACE(ev_execute_reg_methods); |
1da177e4 LT |
1002 | |
1003 | /* | |
9f15fc66 BM |
1004 | * Run all _REG methods for all Operation Regions for this space ID. This |
1005 | * is a separate walk in order to handle any interdependencies between | |
1006 | * regions and _REG methods. (i.e. handlers must be installed for all | |
1007 | * regions of this Space ID before we can run any _REG methods) | |
1da177e4 | 1008 | */ |
4be44fcd LB |
1009 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, |
1010 | ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, | |
1011 | &space_id, NULL); | |
1da177e4 | 1012 | |
4be44fcd | 1013 | return_ACPI_STATUS(status); |
1da177e4 LT |
1014 | } |
1015 | ||
1da177e4 LT |
1016 | /******************************************************************************* |
1017 | * | |
1018 | * FUNCTION: acpi_ev_reg_run | |
1019 | * | |
1020 | * PARAMETERS: walk_namespace callback | |
1021 | * | |
958dd242 | 1022 | * DESCRIPTION: Run _REG method for region objects of the requested space_iD |
1da177e4 LT |
1023 | * |
1024 | ******************************************************************************/ | |
1025 | ||
44f6c012 | 1026 | static acpi_status |
4be44fcd LB |
1027 | acpi_ev_reg_run(acpi_handle obj_handle, |
1028 | u32 level, void *context, void **return_value) | |
1da177e4 | 1029 | { |
4be44fcd LB |
1030 | union acpi_operand_object *obj_desc; |
1031 | struct acpi_namespace_node *node; | |
1032 | acpi_adr_space_type space_id; | |
1033 | acpi_status status; | |
1da177e4 | 1034 | |
4be44fcd | 1035 | space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context); |
1da177e4 LT |
1036 | |
1037 | /* Convert and validate the device handle */ | |
1038 | ||
4be44fcd | 1039 | node = acpi_ns_map_handle_to_node(obj_handle); |
1da177e4 LT |
1040 | if (!node) { |
1041 | return (AE_BAD_PARAMETER); | |
1042 | } | |
1043 | ||
1044 | /* | |
9f15fc66 BM |
1045 | * We only care about regions.and objects that are allowed to have address |
1046 | * space handlers | |
1da177e4 | 1047 | */ |
4be44fcd | 1048 | if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { |
1da177e4 LT |
1049 | return (AE_OK); |
1050 | } | |
1051 | ||
1052 | /* Check for an existing internal object */ | |
1053 | ||
4be44fcd | 1054 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 1055 | if (!obj_desc) { |
52fc0b02 | 1056 | |
1da177e4 LT |
1057 | /* No object, just exit */ |
1058 | ||
1059 | return (AE_OK); | |
1060 | } | |
1061 | ||
1062 | /* Object is a Region */ | |
1063 | ||
1064 | if (obj_desc->region.space_id != space_id) { | |
9f15fc66 BM |
1065 | |
1066 | /* This region is for a different address space, just ignore it */ | |
1067 | ||
1da177e4 LT |
1068 | return (AE_OK); |
1069 | } | |
1070 | ||
4be44fcd | 1071 | status = acpi_ev_execute_reg_method(obj_desc, 1); |
1da177e4 LT |
1072 | return (status); |
1073 | } |