Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, 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 "acinterp.h" | |
47 | #include "acnamesp.h" | |
48 | #include "actables.h" | |
49 | #include "acdispat.h" | |
3c59f960 | 50 | #include "acevents.h" |
528a412c | 51 | #include "amlcode.h" |
1da177e4 | 52 | |
1da177e4 | 53 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 54 | ACPI_MODULE_NAME("exconfig") |
1da177e4 | 55 | |
44f6c012 | 56 | /* Local prototypes */ |
44f6c012 | 57 | static acpi_status |
67a119f9 | 58 | acpi_ex_add_table(u32 table_index, |
4be44fcd LB |
59 | struct acpi_namespace_node *parent_node, |
60 | union acpi_operand_object **ddb_handle); | |
1da177e4 | 61 | |
3c59f960 BM |
62 | static acpi_status |
63 | acpi_ex_region_read(union acpi_operand_object *obj_desc, | |
64 | u32 length, u8 *buffer); | |
65 | ||
1da177e4 LT |
66 | /******************************************************************************* |
67 | * | |
68 | * FUNCTION: acpi_ex_add_table | |
69 | * | |
ba494bee | 70 | * PARAMETERS: table - Pointer to raw table |
1da177e4 LT |
71 | * parent_node - Where to load the table (scope) |
72 | * ddb_handle - Where to return the table handle. | |
73 | * | |
74 | * RETURN: Status | |
75 | * | |
76 | * DESCRIPTION: Common function to Install and Load an ACPI table with a | |
77 | * returned table handle. | |
78 | * | |
79 | ******************************************************************************/ | |
80 | ||
44f6c012 | 81 | static acpi_status |
67a119f9 | 82 | acpi_ex_add_table(u32 table_index, |
4be44fcd LB |
83 | struct acpi_namespace_node *parent_node, |
84 | union acpi_operand_object **ddb_handle) | |
1da177e4 | 85 | { |
4be44fcd | 86 | union acpi_operand_object *obj_desc; |
186c307f BM |
87 | acpi_status status; |
88 | acpi_owner_id owner_id; | |
1da177e4 | 89 | |
b229cf92 | 90 | ACPI_FUNCTION_TRACE(ex_add_table); |
1da177e4 LT |
91 | |
92 | /* Create an object to be the table handle */ | |
93 | ||
4be44fcd | 94 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE); |
1da177e4 | 95 | if (!obj_desc) { |
4be44fcd | 96 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
97 | } |
98 | ||
0c9938cc RM |
99 | /* Init the table handle */ |
100 | ||
e0be6f5a | 101 | obj_desc->common.flags |= AOPOBJ_DATA_VALID; |
1044f1f6 | 102 | obj_desc->reference.class = ACPI_REFCLASS_TABLE; |
0c9938cc RM |
103 | *ddb_handle = obj_desc; |
104 | ||
1da177e4 LT |
105 | /* Install the new table into the local data structures */ |
106 | ||
57e664cf | 107 | obj_desc->reference.value = table_index; |
1da177e4 LT |
108 | |
109 | /* Add the table to the namespace */ | |
110 | ||
f3d2e786 | 111 | status = acpi_ns_load_table(table_index, parent_node); |
4be44fcd | 112 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
113 | acpi_ut_remove_reference(obj_desc); |
114 | *ddb_handle = NULL; | |
7f0c826a | 115 | return_ACPI_STATUS(status); |
1da177e4 LT |
116 | } |
117 | ||
7f0c826a LM |
118 | /* Execute any module-level code that was found in the table */ |
119 | ||
120 | acpi_ex_exit_interpreter(); | |
ca4fc027 LZ |
121 | if (acpi_gbl_group_module_level_code) { |
122 | acpi_ns_exec_module_code_list(); | |
123 | } | |
7f0c826a LM |
124 | acpi_ex_enter_interpreter(); |
125 | ||
75c8044f LZ |
126 | /* |
127 | * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is | |
128 | * responsible for discovering any new wake GPEs by running _PRW methods | |
129 | * that may have been loaded by this table. | |
130 | */ | |
186c307f BM |
131 | status = acpi_tb_get_owner_id(table_index, &owner_id); |
132 | if (ACPI_SUCCESS(status)) { | |
133 | acpi_ev_update_gpes(owner_id); | |
134 | } | |
135 | ||
136 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
137 | } |
138 | ||
1da177e4 LT |
139 | /******************************************************************************* |
140 | * | |
141 | * FUNCTION: acpi_ex_load_table_op | |
142 | * | |
143 | * PARAMETERS: walk_state - Current state with operands | |
144 | * return_desc - Where to store the return object | |
145 | * | |
146 | * RETURN: Status | |
147 | * | |
a6823e12 | 148 | * DESCRIPTION: Load an ACPI table from the RSDT/XSDT |
1da177e4 LT |
149 | * |
150 | ******************************************************************************/ | |
151 | ||
152 | acpi_status | |
4be44fcd LB |
153 | acpi_ex_load_table_op(struct acpi_walk_state *walk_state, |
154 | union acpi_operand_object **return_desc) | |
1da177e4 | 155 | { |
4be44fcd LB |
156 | acpi_status status; |
157 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
4be44fcd LB |
158 | struct acpi_namespace_node *parent_node; |
159 | struct acpi_namespace_node *start_node; | |
160 | struct acpi_namespace_node *parameter_node = NULL; | |
161 | union acpi_operand_object *ddb_handle; | |
f3d2e786 | 162 | struct acpi_table_header *table; |
67a119f9 | 163 | u32 table_index; |
1da177e4 | 164 | |
b229cf92 | 165 | ACPI_FUNCTION_TRACE(ex_load_table_op); |
1da177e4 | 166 | |
a6823e12 | 167 | /* Find the ACPI table in the RSDT/XSDT */ |
1da177e4 | 168 | |
4be44fcd LB |
169 | status = acpi_tb_find_table(operand[0]->string.pointer, |
170 | operand[1]->string.pointer, | |
f3d2e786 | 171 | operand[2]->string.pointer, &table_index); |
4be44fcd | 172 | if (ACPI_FAILURE(status)) { |
1da177e4 | 173 | if (status != AE_NOT_FOUND) { |
4be44fcd | 174 | return_ACPI_STATUS(status); |
1da177e4 LT |
175 | } |
176 | ||
177 | /* Table not found, return an Integer=0 and AE_OK */ | |
178 | ||
dc95a270 | 179 | ddb_handle = acpi_ut_create_integer_object((u64) 0); |
1da177e4 | 180 | if (!ddb_handle) { |
4be44fcd | 181 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
182 | } |
183 | ||
1da177e4 | 184 | *return_desc = ddb_handle; |
4be44fcd | 185 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
186 | } |
187 | ||
188 | /* Default nodes */ | |
189 | ||
190 | start_node = walk_state->scope_info->scope.node; | |
191 | parent_node = acpi_gbl_root_node; | |
192 | ||
193 | /* root_path (optional parameter) */ | |
194 | ||
195 | if (operand[3]->string.length > 0) { | |
196 | /* | |
197 | * Find the node referenced by the root_path_string. This is the | |
198 | * location within the namespace where the table will be loaded. | |
199 | */ | |
4be44fcd | 200 | status = |
4119532c BM |
201 | acpi_ns_get_node(start_node, operand[3]->string.pointer, |
202 | ACPI_NS_SEARCH_PARENT, &parent_node); | |
4be44fcd LB |
203 | if (ACPI_FAILURE(status)) { |
204 | return_ACPI_STATUS(status); | |
1da177e4 LT |
205 | } |
206 | } | |
207 | ||
208 | /* parameter_path (optional parameter) */ | |
209 | ||
210 | if (operand[4]->string.length > 0) { | |
528a412c BM |
211 | if ((operand[4]->string.pointer[0] != AML_ROOT_PREFIX) && |
212 | (operand[4]->string.pointer[0] != AML_PARENT_PREFIX)) { | |
1da177e4 LT |
213 | /* |
214 | * Path is not absolute, so it will be relative to the node | |
215 | * referenced by the root_path_string (or the NS root if omitted) | |
216 | */ | |
217 | start_node = parent_node; | |
218 | } | |
219 | ||
44f6c012 RM |
220 | /* Find the node referenced by the parameter_path_string */ |
221 | ||
4be44fcd | 222 | status = |
4119532c BM |
223 | acpi_ns_get_node(start_node, operand[4]->string.pointer, |
224 | ACPI_NS_SEARCH_PARENT, ¶meter_node); | |
4be44fcd LB |
225 | if (ACPI_FAILURE(status)) { |
226 | return_ACPI_STATUS(status); | |
1da177e4 LT |
227 | } |
228 | } | |
229 | ||
230 | /* Load the table into the namespace */ | |
231 | ||
f3d2e786 | 232 | status = acpi_ex_add_table(table_index, parent_node, &ddb_handle); |
4be44fcd LB |
233 | if (ACPI_FAILURE(status)) { |
234 | return_ACPI_STATUS(status); | |
1da177e4 LT |
235 | } |
236 | ||
237 | /* Parameter Data (optional) */ | |
238 | ||
239 | if (parameter_node) { | |
52fc0b02 | 240 | |
1da177e4 LT |
241 | /* Store the parameter data into the optional parameter object */ |
242 | ||
4be44fcd LB |
243 | status = acpi_ex_store(operand[5], |
244 | ACPI_CAST_PTR(union acpi_operand_object, | |
245 | parameter_node), | |
246 | walk_state); | |
247 | if (ACPI_FAILURE(status)) { | |
248 | (void)acpi_ex_unload_table(ddb_handle); | |
06366c14 LM |
249 | |
250 | acpi_ut_remove_reference(ddb_handle); | |
4be44fcd | 251 | return_ACPI_STATUS(status); |
1da177e4 LT |
252 | } |
253 | } | |
254 | ||
f3d2e786 BM |
255 | status = acpi_get_table_by_index(table_index, &table); |
256 | if (ACPI_SUCCESS(status)) { | |
05fb04b5 | 257 | ACPI_INFO(("Dynamic OEM Table Load:")); |
186c307f | 258 | acpi_tb_print_table_header(0, table); |
f3d2e786 | 259 | } |
967440e3 | 260 | |
3e08e2d2 LM |
261 | /* Invoke table handler if present */ |
262 | ||
263 | if (acpi_gbl_table_handler) { | |
264 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table, | |
265 | acpi_gbl_table_handler_context); | |
266 | } | |
267 | ||
1da177e4 | 268 | *return_desc = ddb_handle; |
4be44fcd | 269 | return_ACPI_STATUS(status); |
1da177e4 LT |
270 | } |
271 | ||
3c59f960 BM |
272 | /******************************************************************************* |
273 | * | |
274 | * FUNCTION: acpi_ex_region_read | |
275 | * | |
276 | * PARAMETERS: obj_desc - Region descriptor | |
ba494bee BM |
277 | * length - Number of bytes to read |
278 | * buffer - Pointer to where to put the data | |
3c59f960 BM |
279 | * |
280 | * RETURN: Status | |
281 | * | |
282 | * DESCRIPTION: Read data from an operation region. The read starts from the | |
283 | * beginning of the region. | |
284 | * | |
285 | ******************************************************************************/ | |
286 | ||
287 | static acpi_status | |
288 | acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer) | |
289 | { | |
290 | acpi_status status; | |
5df7e6cb | 291 | u64 value; |
f5407af3 | 292 | u32 region_offset = 0; |
3c59f960 BM |
293 | u32 i; |
294 | ||
3c59f960 BM |
295 | /* Bytewise reads */ |
296 | ||
297 | for (i = 0; i < length; i++) { | |
9ce81784 BM |
298 | status = |
299 | acpi_ev_address_space_dispatch(obj_desc, NULL, ACPI_READ, | |
300 | region_offset, 8, &value); | |
3c59f960 | 301 | if (ACPI_FAILURE(status)) { |
9c0d7939 | 302 | return (status); |
3c59f960 BM |
303 | } |
304 | ||
305 | *buffer = (u8)value; | |
306 | buffer++; | |
f5407af3 | 307 | region_offset++; |
3c59f960 BM |
308 | } |
309 | ||
9c0d7939 | 310 | return (AE_OK); |
3c59f960 BM |
311 | } |
312 | ||
1da177e4 LT |
313 | /******************************************************************************* |
314 | * | |
315 | * FUNCTION: acpi_ex_load_op | |
316 | * | |
a6823e12 | 317 | * PARAMETERS: obj_desc - Region or Buffer/Field where the table will be |
1da177e4 | 318 | * obtained |
ba494bee | 319 | * target - Where a handle to the table will be stored |
1da177e4 LT |
320 | * walk_state - Current state |
321 | * | |
322 | * RETURN: Status | |
323 | * | |
324 | * DESCRIPTION: Load an ACPI table from a field or operation region | |
325 | * | |
a6823e12 AS |
326 | * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer |
327 | * objects before this code is reached. | |
328 | * | |
329 | * If source is an operation region, it must refer to system_memory, as | |
330 | * per the ACPI specification. | |
331 | * | |
1da177e4 LT |
332 | ******************************************************************************/ |
333 | ||
334 | acpi_status | |
4be44fcd LB |
335 | acpi_ex_load_op(union acpi_operand_object *obj_desc, |
336 | union acpi_operand_object *target, | |
337 | struct acpi_walk_state *walk_state) | |
1da177e4 | 338 | { |
4be44fcd | 339 | union acpi_operand_object *ddb_handle; |
86dfc6f3 | 340 | struct acpi_table_header *table_header; |
f0e0da8a | 341 | struct acpi_table_header *table; |
67a119f9 | 342 | u32 table_index; |
a6823e12 | 343 | acpi_status status; |
98af37fb | 344 | u32 length; |
1da177e4 | 345 | |
b229cf92 | 346 | ACPI_FUNCTION_TRACE(ex_load_op); |
1da177e4 | 347 | |
a6823e12 AS |
348 | /* Source Object can be either an op_region or a Buffer/Field */ |
349 | ||
3371c19c | 350 | switch (obj_desc->common.type) { |
1da177e4 LT |
351 | case ACPI_TYPE_REGION: |
352 | ||
f0e0da8a DN |
353 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
354 | "Load table from Region %p\n", obj_desc)); | |
5eb69180 | 355 | |
a6823e12 AS |
356 | /* Region must be system_memory (from ACPI spec) */ |
357 | ||
358 | if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) { | |
359 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
360 | } | |
361 | ||
1da177e4 | 362 | /* |
1fad8738 BM |
363 | * If the Region Address and Length have not been previously |
364 | * evaluated, evaluate them now and save the results. | |
1da177e4 LT |
365 | */ |
366 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
4be44fcd LB |
367 | status = acpi_ds_get_region_arguments(obj_desc); |
368 | if (ACPI_FAILURE(status)) { | |
369 | return_ACPI_STATUS(status); | |
1da177e4 LT |
370 | } |
371 | } | |
372 | ||
3c59f960 BM |
373 | /* Get the table header first so we can get the table length */ |
374 | ||
86dfc6f3 LZ |
375 | table_header = ACPI_ALLOCATE(sizeof(struct acpi_table_header)); |
376 | if (!table_header) { | |
f0e0da8a DN |
377 | return_ACPI_STATUS(AE_NO_MEMORY); |
378 | } | |
379 | ||
3c59f960 BM |
380 | status = |
381 | acpi_ex_region_read(obj_desc, | |
382 | sizeof(struct acpi_table_header), | |
86dfc6f3 LZ |
383 | ACPI_CAST_PTR(u8, table_header)); |
384 | length = table_header->length; | |
385 | ACPI_FREE(table_header); | |
3c59f960 BM |
386 | |
387 | if (ACPI_FAILURE(status)) { | |
388 | return_ACPI_STATUS(status); | |
389 | } | |
f0e0da8a DN |
390 | |
391 | /* Must have at least an ACPI table header */ | |
392 | ||
393 | if (length < sizeof(struct acpi_table_header)) { | |
394 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
395 | } | |
396 | ||
397 | /* | |
3c59f960 BM |
398 | * The original implementation simply mapped the table, with no copy. |
399 | * However, the memory region is not guaranteed to remain stable and | |
400 | * we must copy the table to a local buffer. For example, the memory | |
401 | * region is corrupted after suspend on some machines. Dynamically | |
402 | * loaded tables are usually small, so this overhead is minimal. | |
403 | * | |
404 | * The latest implementation (5/2009) does not use a mapping at all. | |
405 | * We use the low-level operation region interface to read the table | |
406 | * instead of the obvious optimization of using a direct mapping. | |
407 | * This maintains a consistent use of operation regions across the | |
408 | * entire subsystem. This is important if additional processing must | |
409 | * be performed in the (possibly user-installed) operation region | |
410 | * handler. For example, acpi_exec and ASLTS depend on this. | |
5eb69180 | 411 | */ |
f0e0da8a DN |
412 | |
413 | /* Allocate a buffer for the table */ | |
414 | ||
86dfc6f3 LZ |
415 | table = ACPI_ALLOCATE(length); |
416 | if (!table) { | |
f0e0da8a DN |
417 | return_ACPI_STATUS(AE_NO_MEMORY); |
418 | } | |
419 | ||
3c59f960 | 420 | /* Read the entire table */ |
f0e0da8a | 421 | |
3c59f960 | 422 | status = acpi_ex_region_read(obj_desc, length, |
86dfc6f3 | 423 | ACPI_CAST_PTR(u8, table)); |
3c59f960 | 424 | if (ACPI_FAILURE(status)) { |
86dfc6f3 | 425 | ACPI_FREE(table); |
3c59f960 | 426 | return_ACPI_STATUS(status); |
f0e0da8a | 427 | } |
1da177e4 LT |
428 | break; |
429 | ||
a6823e12 | 430 | case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */ |
1da177e4 | 431 | |
a6823e12 | 432 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
f0e0da8a DN |
433 | "Load table from Buffer or Field %p\n", |
434 | obj_desc)); | |
98af37fb BM |
435 | |
436 | /* Must have at least an ACPI table header */ | |
437 | ||
f0e0da8a | 438 | if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) { |
98af37fb BM |
439 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
440 | } | |
441 | ||
f0e0da8a | 442 | /* Get the actual table length from the table header */ |
98af37fb | 443 | |
86dfc6f3 | 444 | table_header = |
f0e0da8a DN |
445 | ACPI_CAST_PTR(struct acpi_table_header, |
446 | obj_desc->buffer.pointer); | |
86dfc6f3 | 447 | length = table_header->length; |
f0e0da8a DN |
448 | |
449 | /* Table cannot extend beyond the buffer */ | |
450 | ||
451 | if (length > obj_desc->buffer.length) { | |
452 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); | |
453 | } | |
454 | if (length < sizeof(struct acpi_table_header)) { | |
455 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
98af37fb BM |
456 | } |
457 | ||
5eb69180 | 458 | /* |
1fad8738 BM |
459 | * Copy the table from the buffer because the buffer could be |
460 | * modified or even deleted in the future | |
5eb69180 | 461 | */ |
86dfc6f3 LZ |
462 | table = ACPI_ALLOCATE(length); |
463 | if (!table) { | |
5eb69180 BM |
464 | return_ACPI_STATUS(AE_NO_MEMORY); |
465 | } | |
1da177e4 | 466 | |
4fa4616e | 467 | memcpy(table, table_header, length); |
1da177e4 LT |
468 | break; |
469 | ||
1da177e4 | 470 | default: |
1d1ea1b7 | 471 | |
4be44fcd | 472 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
473 | } |
474 | ||
f0e0da8a DN |
475 | /* Install the new table into the local data structures */ |
476 | ||
05fb04b5 | 477 | ACPI_INFO(("Dynamic OEM Table Load:")); |
86dfc6f3 | 478 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
ed6f1d44 BM |
479 | |
480 | status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table), | |
481 | ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL, | |
482 | TRUE, TRUE, &table_index); | |
483 | ||
86dfc6f3 | 484 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
f3d2e786 | 485 | if (ACPI_FAILURE(status)) { |
2147d3f0 BM |
486 | |
487 | /* Delete allocated table buffer */ | |
488 | ||
86dfc6f3 LZ |
489 | ACPI_FREE(table); |
490 | return_ACPI_STATUS(status); | |
491 | } | |
492 | ||
493 | /* | |
494 | * Note: Now table is "INSTALLED", it must be validated before | |
495 | * loading. | |
496 | */ | |
497 | status = | |
498 | acpi_tb_validate_table(&acpi_gbl_root_table_list. | |
499 | tables[table_index]); | |
500 | if (ACPI_FAILURE(status)) { | |
2147d3f0 | 501 | return_ACPI_STATUS(status); |
f3d2e786 | 502 | } |
1da177e4 | 503 | |
0bda3f2f BM |
504 | /* |
505 | * Add the table to the namespace. | |
506 | * | |
f0e0da8a | 507 | * Note: Load the table objects relative to the root of the namespace. |
0bda3f2f BM |
508 | * This appears to go against the ACPI specification, but we do it for |
509 | * compatibility with other ACPI implementations. | |
510 | */ | |
f3d2e786 | 511 | status = |
0bda3f2f | 512 | acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle); |
4be44fcd | 513 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 514 | |
88ac00f5 RM |
515 | /* On error, table_ptr was deallocated above */ |
516 | ||
4be44fcd | 517 | return_ACPI_STATUS(status); |
1da177e4 LT |
518 | } |
519 | ||
520 | /* Store the ddb_handle into the Target operand */ | |
521 | ||
4be44fcd LB |
522 | status = acpi_ex_store(ddb_handle, target, walk_state); |
523 | if (ACPI_FAILURE(status)) { | |
524 | (void)acpi_ex_unload_table(ddb_handle); | |
1da177e4 | 525 | |
88ac00f5 | 526 | /* table_ptr was deallocated above */ |
1da177e4 | 527 | |
a13b8460 | 528 | acpi_ut_remove_reference(ddb_handle); |
4be44fcd | 529 | return_ACPI_STATUS(status); |
88ac00f5 | 530 | } |
1da177e4 | 531 | |
06366c14 LM |
532 | /* Remove the reference by added by acpi_ex_store above */ |
533 | ||
534 | acpi_ut_remove_reference(ddb_handle); | |
535 | ||
3e08e2d2 LM |
536 | /* Invoke table handler if present */ |
537 | ||
538 | if (acpi_gbl_table_handler) { | |
86dfc6f3 | 539 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table, |
3e08e2d2 LM |
540 | acpi_gbl_table_handler_context); |
541 | } | |
542 | ||
4be44fcd | 543 | return_ACPI_STATUS(status); |
1da177e4 LT |
544 | } |
545 | ||
1da177e4 LT |
546 | /******************************************************************************* |
547 | * | |
548 | * FUNCTION: acpi_ex_unload_table | |
549 | * | |
550 | * PARAMETERS: ddb_handle - Handle to a previously loaded table | |
551 | * | |
552 | * RETURN: Status | |
553 | * | |
554 | * DESCRIPTION: Unload an ACPI table | |
555 | * | |
556 | ******************************************************************************/ | |
557 | ||
4be44fcd | 558 | acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle) |
1da177e4 | 559 | { |
4be44fcd LB |
560 | acpi_status status = AE_OK; |
561 | union acpi_operand_object *table_desc = ddb_handle; | |
67a119f9 | 562 | u32 table_index; |
3e08e2d2 | 563 | struct acpi_table_header *table; |
1da177e4 | 564 | |
b229cf92 | 565 | ACPI_FUNCTION_TRACE(ex_unload_table); |
1da177e4 | 566 | |
43d1a62d BM |
567 | /* |
568 | * Temporarily emit a warning so that the ASL for the machine can be | |
569 | * hopefully obtained. This is to say that the Unload() operator is | |
570 | * extremely rare if not completely unused. | |
571 | */ | |
572 | ACPI_WARNING((AE_INFO, "Received request to unload an ACPI table")); | |
573 | ||
1da177e4 LT |
574 | /* |
575 | * Validate the handle | |
e0be6f5a | 576 | * Although the handle is partially validated in acpi_ex_reconfiguration() |
1da177e4 LT |
577 | * when it calls acpi_ex_resolve_operands(), the handle is more completely |
578 | * validated here. | |
e0be6f5a LM |
579 | * |
580 | * Handle must be a valid operand object of type reference. Also, the | |
581 | * ddb_handle must still be marked valid (table has not been previously | |
582 | * unloaded) | |
1da177e4 LT |
583 | */ |
584 | if ((!ddb_handle) || | |
4be44fcd | 585 | (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) || |
e0be6f5a LM |
586 | (ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) || |
587 | (!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) { | |
f6f57f60 | 588 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
589 | } |
590 | ||
57e664cf | 591 | /* Get the table index from the ddb_handle */ |
1da177e4 | 592 | |
57e664cf | 593 | table_index = table_desc->reference.value; |
1da177e4 | 594 | |
e0be6f5a LM |
595 | /* Ensure the table is still loaded */ |
596 | ||
597 | if (!acpi_tb_is_table_loaded(table_index)) { | |
598 | return_ACPI_STATUS(AE_NOT_EXIST); | |
599 | } | |
600 | ||
3e08e2d2 LM |
601 | /* Invoke table handler if present */ |
602 | ||
603 | if (acpi_gbl_table_handler) { | |
604 | status = acpi_get_table_by_index(table_index, &table); | |
605 | if (ACPI_SUCCESS(status)) { | |
606 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD, | |
607 | table, | |
608 | acpi_gbl_table_handler_context); | |
609 | } | |
610 | } | |
611 | ||
8a335a23 BM |
612 | /* Delete the portion of the namespace owned by this table */ |
613 | ||
614 | status = acpi_tb_delete_namespace_by_owner(table_index); | |
615 | if (ACPI_FAILURE(status)) { | |
616 | return_ACPI_STATUS(status); | |
617 | } | |
1da177e4 | 618 | |
8a335a23 | 619 | (void)acpi_tb_release_owner_id(table_index); |
f3d2e786 | 620 | acpi_tb_set_table_loaded_flag(table_index, FALSE); |
1da177e4 | 621 | |
e0be6f5a LM |
622 | /* |
623 | * Invalidate the handle. We do this because the handle may be stored | |
624 | * in a named object and may not be actually deleted until much later. | |
625 | */ | |
626 | ddb_handle->common.flags &= ~AOPOBJ_DATA_VALID; | |
3e08e2d2 | 627 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 628 | } |