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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) | |
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 "acinterp.h" | |
47 | #include "acnamesp.h" | |
48 | #include "actables.h" | |
49 | #include "acdispat.h" | |
3c59f960 | 50 | #include "acevents.h" |
1da177e4 | 51 | |
1da177e4 | 52 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 53 | ACPI_MODULE_NAME("exconfig") |
1da177e4 | 54 | |
44f6c012 | 55 | /* Local prototypes */ |
44f6c012 | 56 | static acpi_status |
67a119f9 | 57 | acpi_ex_add_table(u32 table_index, |
4be44fcd LB |
58 | struct acpi_namespace_node *parent_node, |
59 | union acpi_operand_object **ddb_handle); | |
1da177e4 | 60 | |
3c59f960 BM |
61 | static acpi_status |
62 | acpi_ex_region_read(union acpi_operand_object *obj_desc, | |
63 | u32 length, u8 *buffer); | |
64 | ||
1da177e4 LT |
65 | /******************************************************************************* |
66 | * | |
67 | * FUNCTION: acpi_ex_add_table | |
68 | * | |
69 | * PARAMETERS: Table - Pointer to raw table | |
70 | * parent_node - Where to load the table (scope) | |
71 | * ddb_handle - Where to return the table handle. | |
72 | * | |
73 | * RETURN: Status | |
74 | * | |
75 | * DESCRIPTION: Common function to Install and Load an ACPI table with a | |
76 | * returned table handle. | |
77 | * | |
78 | ******************************************************************************/ | |
79 | ||
44f6c012 | 80 | static acpi_status |
67a119f9 | 81 | acpi_ex_add_table(u32 table_index, |
4be44fcd LB |
82 | struct acpi_namespace_node *parent_node, |
83 | union acpi_operand_object **ddb_handle) | |
1da177e4 | 84 | { |
4be44fcd | 85 | acpi_status status; |
4be44fcd | 86 | union acpi_operand_object *obj_desc; |
1da177e4 | 87 | |
b229cf92 | 88 | ACPI_FUNCTION_TRACE(ex_add_table); |
1da177e4 LT |
89 | |
90 | /* Create an object to be the table handle */ | |
91 | ||
4be44fcd | 92 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE); |
1da177e4 | 93 | if (!obj_desc) { |
4be44fcd | 94 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
95 | } |
96 | ||
0c9938cc RM |
97 | /* Init the table handle */ |
98 | ||
e0be6f5a | 99 | obj_desc->common.flags |= AOPOBJ_DATA_VALID; |
1044f1f6 | 100 | obj_desc->reference.class = ACPI_REFCLASS_TABLE; |
0c9938cc RM |
101 | *ddb_handle = obj_desc; |
102 | ||
1da177e4 LT |
103 | /* Install the new table into the local data structures */ |
104 | ||
57e664cf | 105 | obj_desc->reference.value = table_index; |
1da177e4 LT |
106 | |
107 | /* Add the table to the namespace */ | |
108 | ||
f3d2e786 | 109 | status = acpi_ns_load_table(table_index, parent_node); |
4be44fcd | 110 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
111 | acpi_ut_remove_reference(obj_desc); |
112 | *ddb_handle = NULL; | |
7f0c826a | 113 | return_ACPI_STATUS(status); |
1da177e4 LT |
114 | } |
115 | ||
7f0c826a LM |
116 | /* Execute any module-level code that was found in the table */ |
117 | ||
118 | acpi_ex_exit_interpreter(); | |
119 | acpi_ns_exec_module_code_list(); | |
120 | acpi_ex_enter_interpreter(); | |
121 | ||
4be44fcd | 122 | return_ACPI_STATUS(status); |
1da177e4 LT |
123 | } |
124 | ||
1da177e4 LT |
125 | /******************************************************************************* |
126 | * | |
127 | * FUNCTION: acpi_ex_load_table_op | |
128 | * | |
129 | * PARAMETERS: walk_state - Current state with operands | |
130 | * return_desc - Where to store the return object | |
131 | * | |
132 | * RETURN: Status | |
133 | * | |
a6823e12 | 134 | * DESCRIPTION: Load an ACPI table from the RSDT/XSDT |
1da177e4 LT |
135 | * |
136 | ******************************************************************************/ | |
137 | ||
138 | acpi_status | |
4be44fcd LB |
139 | acpi_ex_load_table_op(struct acpi_walk_state *walk_state, |
140 | union acpi_operand_object **return_desc) | |
1da177e4 | 141 | { |
4be44fcd LB |
142 | acpi_status status; |
143 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
4be44fcd LB |
144 | struct acpi_namespace_node *parent_node; |
145 | struct acpi_namespace_node *start_node; | |
146 | struct acpi_namespace_node *parameter_node = NULL; | |
147 | union acpi_operand_object *ddb_handle; | |
f3d2e786 | 148 | struct acpi_table_header *table; |
67a119f9 | 149 | u32 table_index; |
1da177e4 | 150 | |
b229cf92 | 151 | ACPI_FUNCTION_TRACE(ex_load_table_op); |
1da177e4 | 152 | |
49718b17 LM |
153 | /* Validate lengths for the signature_string, OEMIDString, OEMtable_iD */ |
154 | ||
155 | if ((operand[0]->string.length > ACPI_NAME_SIZE) || | |
156 | (operand[1]->string.length > ACPI_OEM_ID_SIZE) || | |
157 | (operand[2]->string.length > ACPI_OEM_TABLE_ID_SIZE)) { | |
158 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
159 | } | |
160 | ||
a6823e12 | 161 | /* Find the ACPI table in the RSDT/XSDT */ |
1da177e4 | 162 | |
4be44fcd LB |
163 | status = acpi_tb_find_table(operand[0]->string.pointer, |
164 | operand[1]->string.pointer, | |
f3d2e786 | 165 | operand[2]->string.pointer, &table_index); |
4be44fcd | 166 | if (ACPI_FAILURE(status)) { |
1da177e4 | 167 | if (status != AE_NOT_FOUND) { |
4be44fcd | 168 | return_ACPI_STATUS(status); |
1da177e4 LT |
169 | } |
170 | ||
171 | /* Table not found, return an Integer=0 and AE_OK */ | |
172 | ||
4be44fcd | 173 | ddb_handle = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); |
1da177e4 | 174 | if (!ddb_handle) { |
4be44fcd | 175 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
176 | } |
177 | ||
178 | ddb_handle->integer.value = 0; | |
179 | *return_desc = ddb_handle; | |
180 | ||
4be44fcd | 181 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
182 | } |
183 | ||
184 | /* Default nodes */ | |
185 | ||
186 | start_node = walk_state->scope_info->scope.node; | |
187 | parent_node = acpi_gbl_root_node; | |
188 | ||
189 | /* root_path (optional parameter) */ | |
190 | ||
191 | if (operand[3]->string.length > 0) { | |
192 | /* | |
193 | * Find the node referenced by the root_path_string. This is the | |
194 | * location within the namespace where the table will be loaded. | |
195 | */ | |
4be44fcd | 196 | status = |
4119532c BM |
197 | acpi_ns_get_node(start_node, operand[3]->string.pointer, |
198 | ACPI_NS_SEARCH_PARENT, &parent_node); | |
4be44fcd LB |
199 | if (ACPI_FAILURE(status)) { |
200 | return_ACPI_STATUS(status); | |
1da177e4 LT |
201 | } |
202 | } | |
203 | ||
204 | /* parameter_path (optional parameter) */ | |
205 | ||
206 | if (operand[4]->string.length > 0) { | |
207 | if ((operand[4]->string.pointer[0] != '\\') && | |
4be44fcd | 208 | (operand[4]->string.pointer[0] != '^')) { |
1da177e4 LT |
209 | /* |
210 | * Path is not absolute, so it will be relative to the node | |
211 | * referenced by the root_path_string (or the NS root if omitted) | |
212 | */ | |
213 | start_node = parent_node; | |
214 | } | |
215 | ||
44f6c012 RM |
216 | /* Find the node referenced by the parameter_path_string */ |
217 | ||
4be44fcd | 218 | status = |
4119532c BM |
219 | acpi_ns_get_node(start_node, operand[4]->string.pointer, |
220 | ACPI_NS_SEARCH_PARENT, ¶meter_node); | |
4be44fcd LB |
221 | if (ACPI_FAILURE(status)) { |
222 | return_ACPI_STATUS(status); | |
1da177e4 LT |
223 | } |
224 | } | |
225 | ||
226 | /* Load the table into the namespace */ | |
227 | ||
f3d2e786 | 228 | status = acpi_ex_add_table(table_index, parent_node, &ddb_handle); |
4be44fcd LB |
229 | if (ACPI_FAILURE(status)) { |
230 | return_ACPI_STATUS(status); | |
1da177e4 LT |
231 | } |
232 | ||
233 | /* Parameter Data (optional) */ | |
234 | ||
235 | if (parameter_node) { | |
52fc0b02 | 236 | |
1da177e4 LT |
237 | /* Store the parameter data into the optional parameter object */ |
238 | ||
4be44fcd LB |
239 | status = acpi_ex_store(operand[5], |
240 | ACPI_CAST_PTR(union acpi_operand_object, | |
241 | parameter_node), | |
242 | walk_state); | |
243 | if (ACPI_FAILURE(status)) { | |
244 | (void)acpi_ex_unload_table(ddb_handle); | |
06366c14 LM |
245 | |
246 | acpi_ut_remove_reference(ddb_handle); | |
4be44fcd | 247 | return_ACPI_STATUS(status); |
1da177e4 LT |
248 | } |
249 | } | |
250 | ||
f3d2e786 BM |
251 | status = acpi_get_table_by_index(table_index, &table); |
252 | if (ACPI_SUCCESS(status)) { | |
253 | ACPI_INFO((AE_INFO, | |
47c08729 | 254 | "Dynamic OEM Table Load - [%.4s] OemId [%.6s] OemTableId [%.8s]", |
f3d2e786 BM |
255 | table->signature, table->oem_id, |
256 | table->oem_table_id)); | |
257 | } | |
967440e3 | 258 | |
3e08e2d2 LM |
259 | /* Invoke table handler if present */ |
260 | ||
261 | if (acpi_gbl_table_handler) { | |
262 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table, | |
263 | acpi_gbl_table_handler_context); | |
264 | } | |
265 | ||
1da177e4 | 266 | *return_desc = ddb_handle; |
4be44fcd | 267 | return_ACPI_STATUS(status); |
1da177e4 LT |
268 | } |
269 | ||
3c59f960 BM |
270 | /******************************************************************************* |
271 | * | |
272 | * FUNCTION: acpi_ex_region_read | |
273 | * | |
274 | * PARAMETERS: obj_desc - Region descriptor | |
275 | * Length - Number of bytes to read | |
276 | * Buffer - Pointer to where to put the data | |
277 | * | |
278 | * RETURN: Status | |
279 | * | |
280 | * DESCRIPTION: Read data from an operation region. The read starts from the | |
281 | * beginning of the region. | |
282 | * | |
283 | ******************************************************************************/ | |
284 | ||
285 | static acpi_status | |
286 | acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer) | |
287 | { | |
288 | acpi_status status; | |
289 | acpi_integer value; | |
f5407af3 | 290 | u32 region_offset = 0; |
3c59f960 BM |
291 | u32 i; |
292 | ||
3c59f960 BM |
293 | /* Bytewise reads */ |
294 | ||
295 | for (i = 0; i < length; i++) { | |
296 | status = acpi_ev_address_space_dispatch(obj_desc, ACPI_READ, | |
f5407af3 BM |
297 | region_offset, 8, |
298 | &value); | |
3c59f960 BM |
299 | if (ACPI_FAILURE(status)) { |
300 | return status; | |
301 | } | |
302 | ||
303 | *buffer = (u8)value; | |
304 | buffer++; | |
f5407af3 | 305 | region_offset++; |
3c59f960 BM |
306 | } |
307 | ||
308 | return AE_OK; | |
309 | } | |
310 | ||
1da177e4 LT |
311 | /******************************************************************************* |
312 | * | |
313 | * FUNCTION: acpi_ex_load_op | |
314 | * | |
a6823e12 | 315 | * PARAMETERS: obj_desc - Region or Buffer/Field where the table will be |
1da177e4 LT |
316 | * obtained |
317 | * Target - Where a handle to the table will be stored | |
318 | * walk_state - Current state | |
319 | * | |
320 | * RETURN: Status | |
321 | * | |
322 | * DESCRIPTION: Load an ACPI table from a field or operation region | |
323 | * | |
a6823e12 AS |
324 | * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer |
325 | * objects before this code is reached. | |
326 | * | |
327 | * If source is an operation region, it must refer to system_memory, as | |
328 | * per the ACPI specification. | |
329 | * | |
1da177e4 LT |
330 | ******************************************************************************/ |
331 | ||
332 | acpi_status | |
4be44fcd LB |
333 | acpi_ex_load_op(union acpi_operand_object *obj_desc, |
334 | union acpi_operand_object *target, | |
335 | struct acpi_walk_state *walk_state) | |
1da177e4 | 336 | { |
4be44fcd | 337 | union acpi_operand_object *ddb_handle; |
f0e0da8a | 338 | struct acpi_table_header *table; |
428f2112 | 339 | struct acpi_table_desc table_desc; |
67a119f9 | 340 | u32 table_index; |
a6823e12 | 341 | acpi_status status; |
98af37fb | 342 | u32 length; |
1da177e4 | 343 | |
b229cf92 | 344 | ACPI_FUNCTION_TRACE(ex_load_op); |
1da177e4 | 345 | |
428f2112 | 346 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); |
a6823e12 AS |
347 | |
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 LT |
362 | /* |
363 | * If the Region Address and Length have not been previously evaluated, | |
364 | * evaluate them now and save the results. | |
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 | ||
375 | table = ACPI_ALLOCATE(sizeof(struct acpi_table_header)); | |
f0e0da8a DN |
376 | if (!table) { |
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), | |
383 | ACPI_CAST_PTR(u8, table)); | |
f0e0da8a | 384 | length = table->length; |
3c59f960 BM |
385 | ACPI_FREE(table); |
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 | ||
415 | table_desc.pointer = ACPI_ALLOCATE(length); | |
416 | if (!table_desc.pointer) { | |
417 | return_ACPI_STATUS(AE_NO_MEMORY); | |
418 | } | |
419 | ||
3c59f960 | 420 | /* Read the entire table */ |
f0e0da8a | 421 | |
3c59f960 BM |
422 | status = acpi_ex_region_read(obj_desc, length, |
423 | ACPI_CAST_PTR(u8, | |
424 | table_desc.pointer)); | |
425 | if (ACPI_FAILURE(status)) { | |
f0e0da8a | 426 | ACPI_FREE(table_desc.pointer); |
3c59f960 | 427 | return_ACPI_STATUS(status); |
f0e0da8a DN |
428 | } |
429 | ||
a6823e12 | 430 | table_desc.address = obj_desc->region.address; |
1da177e4 LT |
431 | break; |
432 | ||
a6823e12 | 433 | case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */ |
1da177e4 | 434 | |
a6823e12 | 435 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
f0e0da8a DN |
436 | "Load table from Buffer or Field %p\n", |
437 | obj_desc)); | |
98af37fb BM |
438 | |
439 | /* Must have at least an ACPI table header */ | |
440 | ||
f0e0da8a | 441 | if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) { |
98af37fb BM |
442 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
443 | } | |
444 | ||
f0e0da8a | 445 | /* Get the actual table length from the table header */ |
98af37fb | 446 | |
f0e0da8a DN |
447 | table = |
448 | ACPI_CAST_PTR(struct acpi_table_header, | |
449 | obj_desc->buffer.pointer); | |
450 | length = table->length; | |
451 | ||
452 | /* Table cannot extend beyond the buffer */ | |
453 | ||
454 | if (length > obj_desc->buffer.length) { | |
455 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); | |
456 | } | |
457 | if (length < sizeof(struct acpi_table_header)) { | |
458 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
98af37fb BM |
459 | } |
460 | ||
5eb69180 | 461 | /* |
f0e0da8a DN |
462 | * Copy the table from the buffer because the buffer could be modified |
463 | * or even deleted in the future | |
5eb69180 | 464 | */ |
98af37fb | 465 | table_desc.pointer = ACPI_ALLOCATE(length); |
5eb69180 BM |
466 | if (!table_desc.pointer) { |
467 | return_ACPI_STATUS(AE_NO_MEMORY); | |
468 | } | |
1da177e4 | 469 | |
f0e0da8a DN |
470 | ACPI_MEMCPY(table_desc.pointer, table, length); |
471 | table_desc.address = ACPI_TO_INTEGER(table_desc.pointer); | |
1da177e4 LT |
472 | break; |
473 | ||
1da177e4 | 474 | default: |
4be44fcd | 475 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
476 | } |
477 | ||
f0e0da8a DN |
478 | /* Validate table checksum (will not get validated in tb_add_table) */ |
479 | ||
480 | status = acpi_tb_verify_checksum(table_desc.pointer, length); | |
481 | if (ACPI_FAILURE(status)) { | |
482 | ACPI_FREE(table_desc.pointer); | |
483 | return_ACPI_STATUS(status); | |
484 | } | |
485 | ||
486 | /* Complete the table descriptor */ | |
487 | ||
488 | table_desc.length = length; | |
489 | table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED; | |
490 | ||
491 | /* Install the new table into the local data structures */ | |
492 | ||
428f2112 | 493 | status = acpi_tb_add_table(&table_desc, &table_index); |
f3d2e786 | 494 | if (ACPI_FAILURE(status)) { |
0fab8997 | 495 | goto cleanup; |
f3d2e786 | 496 | } |
1da177e4 | 497 | |
0bda3f2f BM |
498 | /* |
499 | * Add the table to the namespace. | |
500 | * | |
f0e0da8a | 501 | * Note: Load the table objects relative to the root of the namespace. |
0bda3f2f BM |
502 | * This appears to go against the ACPI specification, but we do it for |
503 | * compatibility with other ACPI implementations. | |
504 | */ | |
f3d2e786 | 505 | status = |
0bda3f2f | 506 | acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle); |
4be44fcd | 507 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 508 | |
88ac00f5 RM |
509 | /* On error, table_ptr was deallocated above */ |
510 | ||
4be44fcd | 511 | return_ACPI_STATUS(status); |
1da177e4 LT |
512 | } |
513 | ||
514 | /* Store the ddb_handle into the Target operand */ | |
515 | ||
4be44fcd LB |
516 | status = acpi_ex_store(ddb_handle, target, walk_state); |
517 | if (ACPI_FAILURE(status)) { | |
518 | (void)acpi_ex_unload_table(ddb_handle); | |
1da177e4 | 519 | |
88ac00f5 | 520 | /* table_ptr was deallocated above */ |
1da177e4 | 521 | |
a13b8460 | 522 | acpi_ut_remove_reference(ddb_handle); |
4be44fcd | 523 | return_ACPI_STATUS(status); |
88ac00f5 | 524 | } |
1da177e4 | 525 | |
06366c14 LM |
526 | /* Remove the reference by added by acpi_ex_store above */ |
527 | ||
528 | acpi_ut_remove_reference(ddb_handle); | |
529 | ||
3e08e2d2 LM |
530 | /* Invoke table handler if present */ |
531 | ||
532 | if (acpi_gbl_table_handler) { | |
533 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, | |
534 | table_desc.pointer, | |
535 | acpi_gbl_table_handler_context); | |
536 | } | |
537 | ||
4be44fcd LB |
538 | cleanup: |
539 | if (ACPI_FAILURE(status)) { | |
5eb69180 | 540 | |
f0e0da8a | 541 | /* Delete allocated table buffer */ |
5eb69180 | 542 | |
a6823e12 | 543 | acpi_tb_delete_table(&table_desc); |
1da177e4 | 544 | } |
4be44fcd | 545 | return_ACPI_STATUS(status); |
1da177e4 LT |
546 | } |
547 | ||
1da177e4 LT |
548 | /******************************************************************************* |
549 | * | |
550 | * FUNCTION: acpi_ex_unload_table | |
551 | * | |
552 | * PARAMETERS: ddb_handle - Handle to a previously loaded table | |
553 | * | |
554 | * RETURN: Status | |
555 | * | |
556 | * DESCRIPTION: Unload an ACPI table | |
557 | * | |
558 | ******************************************************************************/ | |
559 | ||
4be44fcd | 560 | acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle) |
1da177e4 | 561 | { |
4be44fcd LB |
562 | acpi_status status = AE_OK; |
563 | union acpi_operand_object *table_desc = ddb_handle; | |
67a119f9 | 564 | u32 table_index; |
3e08e2d2 | 565 | struct acpi_table_header *table; |
1da177e4 | 566 | |
b229cf92 | 567 | ACPI_FUNCTION_TRACE(ex_unload_table); |
1da177e4 LT |
568 | |
569 | /* | |
570 | * Validate the handle | |
e0be6f5a | 571 | * Although the handle is partially validated in acpi_ex_reconfiguration() |
1da177e4 LT |
572 | * when it calls acpi_ex_resolve_operands(), the handle is more completely |
573 | * validated here. | |
e0be6f5a LM |
574 | * |
575 | * Handle must be a valid operand object of type reference. Also, the | |
576 | * ddb_handle must still be marked valid (table has not been previously | |
577 | * unloaded) | |
1da177e4 LT |
578 | */ |
579 | if ((!ddb_handle) || | |
4be44fcd | 580 | (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) || |
e0be6f5a LM |
581 | (ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) || |
582 | (!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) { | |
4be44fcd | 583 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
584 | } |
585 | ||
57e664cf | 586 | /* Get the table index from the ddb_handle */ |
1da177e4 | 587 | |
57e664cf | 588 | table_index = table_desc->reference.value; |
1da177e4 | 589 | |
e0be6f5a LM |
590 | /* Ensure the table is still loaded */ |
591 | ||
592 | if (!acpi_tb_is_table_loaded(table_index)) { | |
593 | return_ACPI_STATUS(AE_NOT_EXIST); | |
594 | } | |
595 | ||
3e08e2d2 LM |
596 | /* Invoke table handler if present */ |
597 | ||
598 | if (acpi_gbl_table_handler) { | |
599 | status = acpi_get_table_by_index(table_index, &table); | |
600 | if (ACPI_SUCCESS(status)) { | |
601 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD, | |
602 | table, | |
603 | acpi_gbl_table_handler_context); | |
604 | } | |
605 | } | |
606 | ||
8a335a23 BM |
607 | /* Delete the portion of the namespace owned by this table */ |
608 | ||
609 | status = acpi_tb_delete_namespace_by_owner(table_index); | |
610 | if (ACPI_FAILURE(status)) { | |
611 | return_ACPI_STATUS(status); | |
612 | } | |
1da177e4 | 613 | |
8a335a23 | 614 | (void)acpi_tb_release_owner_id(table_index); |
f3d2e786 | 615 | acpi_tb_set_table_loaded_flag(table_index, FALSE); |
1da177e4 | 616 | |
e0be6f5a LM |
617 | /* |
618 | * Invalidate the handle. We do this because the handle may be stored | |
619 | * in a named object and may not be actually deleted until much later. | |
620 | */ | |
621 | ddb_handle->common.flags &= ~AOPOBJ_DATA_VALID; | |
3e08e2d2 | 622 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 623 | } |