Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, 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 | * | |
ba494bee | 69 | * PARAMETERS: table - Pointer to raw table |
1da177e4 LT |
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 | union acpi_operand_object *obj_desc; |
186c307f BM |
86 | acpi_status status; |
87 | acpi_owner_id owner_id; | |
1da177e4 | 88 | |
b229cf92 | 89 | ACPI_FUNCTION_TRACE(ex_add_table); |
1da177e4 LT |
90 | |
91 | /* Create an object to be the table handle */ | |
92 | ||
4be44fcd | 93 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE); |
1da177e4 | 94 | if (!obj_desc) { |
4be44fcd | 95 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
96 | } |
97 | ||
0c9938cc RM |
98 | /* Init the table handle */ |
99 | ||
e0be6f5a | 100 | obj_desc->common.flags |= AOPOBJ_DATA_VALID; |
1044f1f6 | 101 | obj_desc->reference.class = ACPI_REFCLASS_TABLE; |
0c9938cc RM |
102 | *ddb_handle = obj_desc; |
103 | ||
1da177e4 LT |
104 | /* Install the new table into the local data structures */ |
105 | ||
57e664cf | 106 | obj_desc->reference.value = table_index; |
1da177e4 LT |
107 | |
108 | /* Add the table to the namespace */ | |
109 | ||
f3d2e786 | 110 | status = acpi_ns_load_table(table_index, parent_node); |
4be44fcd | 111 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
112 | acpi_ut_remove_reference(obj_desc); |
113 | *ddb_handle = NULL; | |
7f0c826a | 114 | return_ACPI_STATUS(status); |
1da177e4 LT |
115 | } |
116 | ||
7f0c826a LM |
117 | /* Execute any module-level code that was found in the table */ |
118 | ||
119 | acpi_ex_exit_interpreter(); | |
120 | acpi_ns_exec_module_code_list(); | |
121 | acpi_ex_enter_interpreter(); | |
122 | ||
9874647b | 123 | /* Update GPEs for any new _Lxx/_Exx methods. Ignore errors */ |
186c307f BM |
124 | |
125 | status = acpi_tb_get_owner_id(table_index, &owner_id); | |
126 | if (ACPI_SUCCESS(status)) { | |
127 | acpi_ev_update_gpes(owner_id); | |
128 | } | |
129 | ||
130 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
131 | } |
132 | ||
1da177e4 LT |
133 | /******************************************************************************* |
134 | * | |
135 | * FUNCTION: acpi_ex_load_table_op | |
136 | * | |
137 | * PARAMETERS: walk_state - Current state with operands | |
138 | * return_desc - Where to store the return object | |
139 | * | |
140 | * RETURN: Status | |
141 | * | |
a6823e12 | 142 | * DESCRIPTION: Load an ACPI table from the RSDT/XSDT |
1da177e4 LT |
143 | * |
144 | ******************************************************************************/ | |
145 | ||
146 | acpi_status | |
4be44fcd LB |
147 | acpi_ex_load_table_op(struct acpi_walk_state *walk_state, |
148 | union acpi_operand_object **return_desc) | |
1da177e4 | 149 | { |
4be44fcd LB |
150 | acpi_status status; |
151 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
4be44fcd LB |
152 | struct acpi_namespace_node *parent_node; |
153 | struct acpi_namespace_node *start_node; | |
154 | struct acpi_namespace_node *parameter_node = NULL; | |
155 | union acpi_operand_object *ddb_handle; | |
f3d2e786 | 156 | struct acpi_table_header *table; |
67a119f9 | 157 | u32 table_index; |
1da177e4 | 158 | |
b229cf92 | 159 | ACPI_FUNCTION_TRACE(ex_load_table_op); |
1da177e4 | 160 | |
49718b17 LM |
161 | /* Validate lengths for the signature_string, OEMIDString, OEMtable_iD */ |
162 | ||
163 | if ((operand[0]->string.length > ACPI_NAME_SIZE) || | |
164 | (operand[1]->string.length > ACPI_OEM_ID_SIZE) || | |
165 | (operand[2]->string.length > ACPI_OEM_TABLE_ID_SIZE)) { | |
166 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
167 | } | |
168 | ||
a6823e12 | 169 | /* Find the ACPI table in the RSDT/XSDT */ |
1da177e4 | 170 | |
4be44fcd LB |
171 | status = acpi_tb_find_table(operand[0]->string.pointer, |
172 | operand[1]->string.pointer, | |
f3d2e786 | 173 | operand[2]->string.pointer, &table_index); |
4be44fcd | 174 | if (ACPI_FAILURE(status)) { |
1da177e4 | 175 | if (status != AE_NOT_FOUND) { |
4be44fcd | 176 | return_ACPI_STATUS(status); |
1da177e4 LT |
177 | } |
178 | ||
179 | /* Table not found, return an Integer=0 and AE_OK */ | |
180 | ||
dc95a270 | 181 | ddb_handle = acpi_ut_create_integer_object((u64) 0); |
1da177e4 | 182 | if (!ddb_handle) { |
4be44fcd | 183 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
184 | } |
185 | ||
1da177e4 | 186 | *return_desc = ddb_handle; |
4be44fcd | 187 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
188 | } |
189 | ||
190 | /* Default nodes */ | |
191 | ||
192 | start_node = walk_state->scope_info->scope.node; | |
193 | parent_node = acpi_gbl_root_node; | |
194 | ||
195 | /* root_path (optional parameter) */ | |
196 | ||
197 | if (operand[3]->string.length > 0) { | |
198 | /* | |
199 | * Find the node referenced by the root_path_string. This is the | |
200 | * location within the namespace where the table will be loaded. | |
201 | */ | |
4be44fcd | 202 | status = |
4119532c BM |
203 | acpi_ns_get_node(start_node, operand[3]->string.pointer, |
204 | ACPI_NS_SEARCH_PARENT, &parent_node); | |
4be44fcd LB |
205 | if (ACPI_FAILURE(status)) { |
206 | return_ACPI_STATUS(status); | |
1da177e4 LT |
207 | } |
208 | } | |
209 | ||
210 | /* parameter_path (optional parameter) */ | |
211 | ||
212 | if (operand[4]->string.length > 0) { | |
213 | if ((operand[4]->string.pointer[0] != '\\') && | |
4be44fcd | 214 | (operand[4]->string.pointer[0] != '^')) { |
1da177e4 LT |
215 | /* |
216 | * Path is not absolute, so it will be relative to the node | |
217 | * referenced by the root_path_string (or the NS root if omitted) | |
218 | */ | |
219 | start_node = parent_node; | |
220 | } | |
221 | ||
44f6c012 RM |
222 | /* Find the node referenced by the parameter_path_string */ |
223 | ||
4be44fcd | 224 | status = |
4119532c BM |
225 | acpi_ns_get_node(start_node, operand[4]->string.pointer, |
226 | ACPI_NS_SEARCH_PARENT, ¶meter_node); | |
4be44fcd LB |
227 | if (ACPI_FAILURE(status)) { |
228 | return_ACPI_STATUS(status); | |
1da177e4 LT |
229 | } |
230 | } | |
231 | ||
232 | /* Load the table into the namespace */ | |
233 | ||
f3d2e786 | 234 | status = acpi_ex_add_table(table_index, parent_node, &ddb_handle); |
4be44fcd LB |
235 | if (ACPI_FAILURE(status)) { |
236 | return_ACPI_STATUS(status); | |
1da177e4 LT |
237 | } |
238 | ||
239 | /* Parameter Data (optional) */ | |
240 | ||
241 | if (parameter_node) { | |
52fc0b02 | 242 | |
1da177e4 LT |
243 | /* Store the parameter data into the optional parameter object */ |
244 | ||
4be44fcd LB |
245 | status = acpi_ex_store(operand[5], |
246 | ACPI_CAST_PTR(union acpi_operand_object, | |
247 | parameter_node), | |
248 | walk_state); | |
249 | if (ACPI_FAILURE(status)) { | |
250 | (void)acpi_ex_unload_table(ddb_handle); | |
06366c14 LM |
251 | |
252 | acpi_ut_remove_reference(ddb_handle); | |
4be44fcd | 253 | return_ACPI_STATUS(status); |
1da177e4 LT |
254 | } |
255 | } | |
256 | ||
f3d2e786 BM |
257 | status = acpi_get_table_by_index(table_index, &table); |
258 | if (ACPI_SUCCESS(status)) { | |
186c307f BM |
259 | ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:")); |
260 | acpi_tb_print_table_header(0, table); | |
f3d2e786 | 261 | } |
967440e3 | 262 | |
3e08e2d2 LM |
263 | /* Invoke table handler if present */ |
264 | ||
265 | if (acpi_gbl_table_handler) { | |
266 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table, | |
267 | acpi_gbl_table_handler_context); | |
268 | } | |
269 | ||
1da177e4 | 270 | *return_desc = ddb_handle; |
4be44fcd | 271 | return_ACPI_STATUS(status); |
1da177e4 LT |
272 | } |
273 | ||
3c59f960 BM |
274 | /******************************************************************************* |
275 | * | |
276 | * FUNCTION: acpi_ex_region_read | |
277 | * | |
278 | * PARAMETERS: obj_desc - Region descriptor | |
ba494bee BM |
279 | * length - Number of bytes to read |
280 | * buffer - Pointer to where to put the data | |
3c59f960 BM |
281 | * |
282 | * RETURN: Status | |
283 | * | |
284 | * DESCRIPTION: Read data from an operation region. The read starts from the | |
285 | * beginning of the region. | |
286 | * | |
287 | ******************************************************************************/ | |
288 | ||
289 | static acpi_status | |
290 | acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer) | |
291 | { | |
292 | acpi_status status; | |
5df7e6cb | 293 | u64 value; |
f5407af3 | 294 | u32 region_offset = 0; |
3c59f960 BM |
295 | u32 i; |
296 | ||
3c59f960 BM |
297 | /* Bytewise reads */ |
298 | ||
299 | for (i = 0; i < length; i++) { | |
9ce81784 BM |
300 | status = |
301 | acpi_ev_address_space_dispatch(obj_desc, NULL, ACPI_READ, | |
302 | region_offset, 8, &value); | |
3c59f960 BM |
303 | if (ACPI_FAILURE(status)) { |
304 | return status; | |
305 | } | |
306 | ||
307 | *buffer = (u8)value; | |
308 | buffer++; | |
f5407af3 | 309 | region_offset++; |
3c59f960 BM |
310 | } |
311 | ||
312 | return AE_OK; | |
313 | } | |
314 | ||
1da177e4 LT |
315 | /******************************************************************************* |
316 | * | |
317 | * FUNCTION: acpi_ex_load_op | |
318 | * | |
a6823e12 | 319 | * PARAMETERS: obj_desc - Region or Buffer/Field where the table will be |
1da177e4 | 320 | * obtained |
ba494bee | 321 | * target - Where a handle to the table will be stored |
1da177e4 LT |
322 | * walk_state - Current state |
323 | * | |
324 | * RETURN: Status | |
325 | * | |
326 | * DESCRIPTION: Load an ACPI table from a field or operation region | |
327 | * | |
a6823e12 AS |
328 | * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer |
329 | * objects before this code is reached. | |
330 | * | |
331 | * If source is an operation region, it must refer to system_memory, as | |
332 | * per the ACPI specification. | |
333 | * | |
1da177e4 LT |
334 | ******************************************************************************/ |
335 | ||
336 | acpi_status | |
4be44fcd LB |
337 | acpi_ex_load_op(union acpi_operand_object *obj_desc, |
338 | union acpi_operand_object *target, | |
339 | struct acpi_walk_state *walk_state) | |
1da177e4 | 340 | { |
4be44fcd | 341 | union acpi_operand_object *ddb_handle; |
f0e0da8a | 342 | struct acpi_table_header *table; |
428f2112 | 343 | struct acpi_table_desc table_desc; |
67a119f9 | 344 | u32 table_index; |
a6823e12 | 345 | acpi_status status; |
98af37fb | 346 | u32 length; |
1da177e4 | 347 | |
b229cf92 | 348 | ACPI_FUNCTION_TRACE(ex_load_op); |
1da177e4 | 349 | |
428f2112 | 350 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); |
a6823e12 AS |
351 | |
352 | /* Source Object can be either an op_region or a Buffer/Field */ | |
353 | ||
3371c19c | 354 | switch (obj_desc->common.type) { |
1da177e4 LT |
355 | case ACPI_TYPE_REGION: |
356 | ||
f0e0da8a DN |
357 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
358 | "Load table from Region %p\n", obj_desc)); | |
5eb69180 | 359 | |
a6823e12 AS |
360 | /* Region must be system_memory (from ACPI spec) */ |
361 | ||
362 | if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) { | |
363 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
364 | } | |
365 | ||
1da177e4 LT |
366 | /* |
367 | * If the Region Address and Length have not been previously evaluated, | |
368 | * evaluate them now and save the results. | |
369 | */ | |
370 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
4be44fcd LB |
371 | status = acpi_ds_get_region_arguments(obj_desc); |
372 | if (ACPI_FAILURE(status)) { | |
373 | return_ACPI_STATUS(status); | |
1da177e4 LT |
374 | } |
375 | } | |
376 | ||
3c59f960 BM |
377 | /* Get the table header first so we can get the table length */ |
378 | ||
379 | table = ACPI_ALLOCATE(sizeof(struct acpi_table_header)); | |
f0e0da8a DN |
380 | if (!table) { |
381 | return_ACPI_STATUS(AE_NO_MEMORY); | |
382 | } | |
383 | ||
3c59f960 BM |
384 | status = |
385 | acpi_ex_region_read(obj_desc, | |
386 | sizeof(struct acpi_table_header), | |
387 | ACPI_CAST_PTR(u8, table)); | |
f0e0da8a | 388 | length = table->length; |
3c59f960 BM |
389 | ACPI_FREE(table); |
390 | ||
391 | if (ACPI_FAILURE(status)) { | |
392 | return_ACPI_STATUS(status); | |
393 | } | |
f0e0da8a DN |
394 | |
395 | /* Must have at least an ACPI table header */ | |
396 | ||
397 | if (length < sizeof(struct acpi_table_header)) { | |
398 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
399 | } | |
400 | ||
401 | /* | |
3c59f960 BM |
402 | * The original implementation simply mapped the table, with no copy. |
403 | * However, the memory region is not guaranteed to remain stable and | |
404 | * we must copy the table to a local buffer. For example, the memory | |
405 | * region is corrupted after suspend on some machines. Dynamically | |
406 | * loaded tables are usually small, so this overhead is minimal. | |
407 | * | |
408 | * The latest implementation (5/2009) does not use a mapping at all. | |
409 | * We use the low-level operation region interface to read the table | |
410 | * instead of the obvious optimization of using a direct mapping. | |
411 | * This maintains a consistent use of operation regions across the | |
412 | * entire subsystem. This is important if additional processing must | |
413 | * be performed in the (possibly user-installed) operation region | |
414 | * handler. For example, acpi_exec and ASLTS depend on this. | |
5eb69180 | 415 | */ |
f0e0da8a DN |
416 | |
417 | /* Allocate a buffer for the table */ | |
418 | ||
419 | table_desc.pointer = ACPI_ALLOCATE(length); | |
420 | if (!table_desc.pointer) { | |
421 | return_ACPI_STATUS(AE_NO_MEMORY); | |
422 | } | |
423 | ||
3c59f960 | 424 | /* Read the entire table */ |
f0e0da8a | 425 | |
3c59f960 BM |
426 | status = acpi_ex_region_read(obj_desc, length, |
427 | ACPI_CAST_PTR(u8, | |
428 | table_desc.pointer)); | |
429 | if (ACPI_FAILURE(status)) { | |
f0e0da8a | 430 | ACPI_FREE(table_desc.pointer); |
3c59f960 | 431 | return_ACPI_STATUS(status); |
f0e0da8a DN |
432 | } |
433 | ||
a6823e12 | 434 | table_desc.address = obj_desc->region.address; |
1da177e4 LT |
435 | break; |
436 | ||
a6823e12 | 437 | case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */ |
1da177e4 | 438 | |
a6823e12 | 439 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
f0e0da8a DN |
440 | "Load table from Buffer or Field %p\n", |
441 | obj_desc)); | |
98af37fb BM |
442 | |
443 | /* Must have at least an ACPI table header */ | |
444 | ||
f0e0da8a | 445 | if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) { |
98af37fb BM |
446 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
447 | } | |
448 | ||
f0e0da8a | 449 | /* Get the actual table length from the table header */ |
98af37fb | 450 | |
f0e0da8a DN |
451 | table = |
452 | ACPI_CAST_PTR(struct acpi_table_header, | |
453 | obj_desc->buffer.pointer); | |
454 | length = table->length; | |
455 | ||
456 | /* Table cannot extend beyond the buffer */ | |
457 | ||
458 | if (length > obj_desc->buffer.length) { | |
459 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); | |
460 | } | |
461 | if (length < sizeof(struct acpi_table_header)) { | |
462 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
98af37fb BM |
463 | } |
464 | ||
5eb69180 | 465 | /* |
f0e0da8a DN |
466 | * Copy the table from the buffer because the buffer could be modified |
467 | * or even deleted in the future | |
5eb69180 | 468 | */ |
98af37fb | 469 | table_desc.pointer = ACPI_ALLOCATE(length); |
5eb69180 BM |
470 | if (!table_desc.pointer) { |
471 | return_ACPI_STATUS(AE_NO_MEMORY); | |
472 | } | |
1da177e4 | 473 | |
f0e0da8a DN |
474 | ACPI_MEMCPY(table_desc.pointer, table, length); |
475 | table_desc.address = ACPI_TO_INTEGER(table_desc.pointer); | |
1da177e4 LT |
476 | break; |
477 | ||
1da177e4 | 478 | default: |
4be44fcd | 479 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
480 | } |
481 | ||
f0e0da8a DN |
482 | /* Validate table checksum (will not get validated in tb_add_table) */ |
483 | ||
484 | status = acpi_tb_verify_checksum(table_desc.pointer, length); | |
485 | if (ACPI_FAILURE(status)) { | |
486 | ACPI_FREE(table_desc.pointer); | |
487 | return_ACPI_STATUS(status); | |
488 | } | |
489 | ||
490 | /* Complete the table descriptor */ | |
491 | ||
492 | table_desc.length = length; | |
493 | table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED; | |
494 | ||
495 | /* Install the new table into the local data structures */ | |
496 | ||
428f2112 | 497 | status = acpi_tb_add_table(&table_desc, &table_index); |
f3d2e786 | 498 | if (ACPI_FAILURE(status)) { |
2147d3f0 BM |
499 | |
500 | /* Delete allocated table buffer */ | |
501 | ||
502 | acpi_tb_delete_table(&table_desc); | |
503 | return_ACPI_STATUS(status); | |
f3d2e786 | 504 | } |
1da177e4 | 505 | |
0bda3f2f BM |
506 | /* |
507 | * Add the table to the namespace. | |
508 | * | |
f0e0da8a | 509 | * Note: Load the table objects relative to the root of the namespace. |
0bda3f2f BM |
510 | * This appears to go against the ACPI specification, but we do it for |
511 | * compatibility with other ACPI implementations. | |
512 | */ | |
f3d2e786 | 513 | status = |
0bda3f2f | 514 | acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle); |
4be44fcd | 515 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 516 | |
88ac00f5 RM |
517 | /* On error, table_ptr was deallocated above */ |
518 | ||
4be44fcd | 519 | return_ACPI_STATUS(status); |
1da177e4 LT |
520 | } |
521 | ||
522 | /* Store the ddb_handle into the Target operand */ | |
523 | ||
4be44fcd LB |
524 | status = acpi_ex_store(ddb_handle, target, walk_state); |
525 | if (ACPI_FAILURE(status)) { | |
526 | (void)acpi_ex_unload_table(ddb_handle); | |
1da177e4 | 527 | |
88ac00f5 | 528 | /* table_ptr was deallocated above */ |
1da177e4 | 529 | |
a13b8460 | 530 | acpi_ut_remove_reference(ddb_handle); |
4be44fcd | 531 | return_ACPI_STATUS(status); |
88ac00f5 | 532 | } |
1da177e4 | 533 | |
186c307f BM |
534 | ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:")); |
535 | acpi_tb_print_table_header(0, table_desc.pointer); | |
536 | ||
06366c14 LM |
537 | /* Remove the reference by added by acpi_ex_store above */ |
538 | ||
539 | acpi_ut_remove_reference(ddb_handle); | |
540 | ||
3e08e2d2 LM |
541 | /* Invoke table handler if present */ |
542 | ||
543 | if (acpi_gbl_table_handler) { | |
544 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, | |
545 | table_desc.pointer, | |
546 | acpi_gbl_table_handler_context); | |
547 | } | |
548 | ||
4be44fcd | 549 | return_ACPI_STATUS(status); |
1da177e4 LT |
550 | } |
551 | ||
1da177e4 LT |
552 | /******************************************************************************* |
553 | * | |
554 | * FUNCTION: acpi_ex_unload_table | |
555 | * | |
556 | * PARAMETERS: ddb_handle - Handle to a previously loaded table | |
557 | * | |
558 | * RETURN: Status | |
559 | * | |
560 | * DESCRIPTION: Unload an ACPI table | |
561 | * | |
562 | ******************************************************************************/ | |
563 | ||
4be44fcd | 564 | acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle) |
1da177e4 | 565 | { |
4be44fcd LB |
566 | acpi_status status = AE_OK; |
567 | union acpi_operand_object *table_desc = ddb_handle; | |
67a119f9 | 568 | u32 table_index; |
3e08e2d2 | 569 | struct acpi_table_header *table; |
1da177e4 | 570 | |
b229cf92 | 571 | ACPI_FUNCTION_TRACE(ex_unload_table); |
1da177e4 LT |
572 | |
573 | /* | |
574 | * Validate the handle | |
e0be6f5a | 575 | * Although the handle is partially validated in acpi_ex_reconfiguration() |
1da177e4 LT |
576 | * when it calls acpi_ex_resolve_operands(), the handle is more completely |
577 | * validated here. | |
e0be6f5a LM |
578 | * |
579 | * Handle must be a valid operand object of type reference. Also, the | |
580 | * ddb_handle must still be marked valid (table has not been previously | |
581 | * unloaded) | |
1da177e4 LT |
582 | */ |
583 | if ((!ddb_handle) || | |
4be44fcd | 584 | (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) || |
e0be6f5a LM |
585 | (ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) || |
586 | (!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) { | |
4be44fcd | 587 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
588 | } |
589 | ||
57e664cf | 590 | /* Get the table index from the ddb_handle */ |
1da177e4 | 591 | |
57e664cf | 592 | table_index = table_desc->reference.value; |
1da177e4 | 593 | |
e0be6f5a LM |
594 | /* Ensure the table is still loaded */ |
595 | ||
596 | if (!acpi_tb_is_table_loaded(table_index)) { | |
597 | return_ACPI_STATUS(AE_NOT_EXIST); | |
598 | } | |
599 | ||
3e08e2d2 LM |
600 | /* Invoke table handler if present */ |
601 | ||
602 | if (acpi_gbl_table_handler) { | |
603 | status = acpi_get_table_by_index(table_index, &table); | |
604 | if (ACPI_SUCCESS(status)) { | |
605 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD, | |
606 | table, | |
607 | acpi_gbl_table_handler_context); | |
608 | } | |
609 | } | |
610 | ||
8a335a23 BM |
611 | /* Delete the portion of the namespace owned by this table */ |
612 | ||
613 | status = acpi_tb_delete_namespace_by_owner(table_index); | |
614 | if (ACPI_FAILURE(status)) { | |
615 | return_ACPI_STATUS(status); | |
616 | } | |
1da177e4 | 617 | |
8a335a23 | 618 | (void)acpi_tb_release_owner_id(table_index); |
f3d2e786 | 619 | acpi_tb_set_table_loaded_flag(table_index, FALSE); |
1da177e4 | 620 | |
e0be6f5a LM |
621 | /* |
622 | * Invalidate the handle. We do this because the handle may be stored | |
623 | * in a named object and may not be actually deleted until much later. | |
624 | */ | |
625 | ddb_handle->common.flags &= ~AOPOBJ_DATA_VALID; | |
3e08e2d2 | 626 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 627 | } |