Commit | Line | Data |
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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; | |
1da177e4 LT |
113 | } |
114 | ||
4be44fcd | 115 | return_ACPI_STATUS(status); |
1da177e4 LT |
116 | } |
117 | ||
1da177e4 LT |
118 | /******************************************************************************* |
119 | * | |
120 | * FUNCTION: acpi_ex_load_table_op | |
121 | * | |
122 | * PARAMETERS: walk_state - Current state with operands | |
123 | * return_desc - Where to store the return object | |
124 | * | |
125 | * RETURN: Status | |
126 | * | |
a6823e12 | 127 | * DESCRIPTION: Load an ACPI table from the RSDT/XSDT |
1da177e4 LT |
128 | * |
129 | ******************************************************************************/ | |
130 | ||
131 | acpi_status | |
4be44fcd LB |
132 | acpi_ex_load_table_op(struct acpi_walk_state *walk_state, |
133 | union acpi_operand_object **return_desc) | |
1da177e4 | 134 | { |
4be44fcd LB |
135 | acpi_status status; |
136 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
4be44fcd LB |
137 | struct acpi_namespace_node *parent_node; |
138 | struct acpi_namespace_node *start_node; | |
139 | struct acpi_namespace_node *parameter_node = NULL; | |
140 | union acpi_operand_object *ddb_handle; | |
f3d2e786 | 141 | struct acpi_table_header *table; |
67a119f9 | 142 | u32 table_index; |
1da177e4 | 143 | |
b229cf92 | 144 | ACPI_FUNCTION_TRACE(ex_load_table_op); |
1da177e4 | 145 | |
49718b17 LM |
146 | /* Validate lengths for the signature_string, OEMIDString, OEMtable_iD */ |
147 | ||
148 | if ((operand[0]->string.length > ACPI_NAME_SIZE) || | |
149 | (operand[1]->string.length > ACPI_OEM_ID_SIZE) || | |
150 | (operand[2]->string.length > ACPI_OEM_TABLE_ID_SIZE)) { | |
151 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
152 | } | |
153 | ||
a6823e12 | 154 | /* Find the ACPI table in the RSDT/XSDT */ |
1da177e4 | 155 | |
4be44fcd LB |
156 | status = acpi_tb_find_table(operand[0]->string.pointer, |
157 | operand[1]->string.pointer, | |
f3d2e786 | 158 | operand[2]->string.pointer, &table_index); |
4be44fcd | 159 | if (ACPI_FAILURE(status)) { |
1da177e4 | 160 | if (status != AE_NOT_FOUND) { |
4be44fcd | 161 | return_ACPI_STATUS(status); |
1da177e4 LT |
162 | } |
163 | ||
164 | /* Table not found, return an Integer=0 and AE_OK */ | |
165 | ||
4be44fcd | 166 | ddb_handle = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); |
1da177e4 | 167 | if (!ddb_handle) { |
4be44fcd | 168 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
169 | } |
170 | ||
171 | ddb_handle->integer.value = 0; | |
172 | *return_desc = ddb_handle; | |
173 | ||
4be44fcd | 174 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
175 | } |
176 | ||
177 | /* Default nodes */ | |
178 | ||
179 | start_node = walk_state->scope_info->scope.node; | |
180 | parent_node = acpi_gbl_root_node; | |
181 | ||
182 | /* root_path (optional parameter) */ | |
183 | ||
184 | if (operand[3]->string.length > 0) { | |
185 | /* | |
186 | * Find the node referenced by the root_path_string. This is the | |
187 | * location within the namespace where the table will be loaded. | |
188 | */ | |
4be44fcd | 189 | status = |
4119532c BM |
190 | acpi_ns_get_node(start_node, operand[3]->string.pointer, |
191 | ACPI_NS_SEARCH_PARENT, &parent_node); | |
4be44fcd LB |
192 | if (ACPI_FAILURE(status)) { |
193 | return_ACPI_STATUS(status); | |
1da177e4 LT |
194 | } |
195 | } | |
196 | ||
197 | /* parameter_path (optional parameter) */ | |
198 | ||
199 | if (operand[4]->string.length > 0) { | |
200 | if ((operand[4]->string.pointer[0] != '\\') && | |
4be44fcd | 201 | (operand[4]->string.pointer[0] != '^')) { |
1da177e4 LT |
202 | /* |
203 | * Path is not absolute, so it will be relative to the node | |
204 | * referenced by the root_path_string (or the NS root if omitted) | |
205 | */ | |
206 | start_node = parent_node; | |
207 | } | |
208 | ||
44f6c012 RM |
209 | /* Find the node referenced by the parameter_path_string */ |
210 | ||
4be44fcd | 211 | status = |
4119532c BM |
212 | acpi_ns_get_node(start_node, operand[4]->string.pointer, |
213 | ACPI_NS_SEARCH_PARENT, ¶meter_node); | |
4be44fcd LB |
214 | if (ACPI_FAILURE(status)) { |
215 | return_ACPI_STATUS(status); | |
1da177e4 LT |
216 | } |
217 | } | |
218 | ||
219 | /* Load the table into the namespace */ | |
220 | ||
f3d2e786 | 221 | status = acpi_ex_add_table(table_index, parent_node, &ddb_handle); |
4be44fcd LB |
222 | if (ACPI_FAILURE(status)) { |
223 | return_ACPI_STATUS(status); | |
1da177e4 LT |
224 | } |
225 | ||
226 | /* Parameter Data (optional) */ | |
227 | ||
228 | if (parameter_node) { | |
52fc0b02 | 229 | |
1da177e4 LT |
230 | /* Store the parameter data into the optional parameter object */ |
231 | ||
4be44fcd LB |
232 | status = acpi_ex_store(operand[5], |
233 | ACPI_CAST_PTR(union acpi_operand_object, | |
234 | parameter_node), | |
235 | walk_state); | |
236 | if (ACPI_FAILURE(status)) { | |
237 | (void)acpi_ex_unload_table(ddb_handle); | |
06366c14 LM |
238 | |
239 | acpi_ut_remove_reference(ddb_handle); | |
4be44fcd | 240 | return_ACPI_STATUS(status); |
1da177e4 LT |
241 | } |
242 | } | |
243 | ||
f3d2e786 BM |
244 | status = acpi_get_table_by_index(table_index, &table); |
245 | if (ACPI_SUCCESS(status)) { | |
246 | ACPI_INFO((AE_INFO, | |
47c08729 | 247 | "Dynamic OEM Table Load - [%.4s] OemId [%.6s] OemTableId [%.8s]", |
f3d2e786 BM |
248 | table->signature, table->oem_id, |
249 | table->oem_table_id)); | |
250 | } | |
967440e3 | 251 | |
3e08e2d2 LM |
252 | /* Invoke table handler if present */ |
253 | ||
254 | if (acpi_gbl_table_handler) { | |
255 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table, | |
256 | acpi_gbl_table_handler_context); | |
257 | } | |
258 | ||
1da177e4 | 259 | *return_desc = ddb_handle; |
4be44fcd | 260 | return_ACPI_STATUS(status); |
1da177e4 LT |
261 | } |
262 | ||
3c59f960 BM |
263 | /******************************************************************************* |
264 | * | |
265 | * FUNCTION: acpi_ex_region_read | |
266 | * | |
267 | * PARAMETERS: obj_desc - Region descriptor | |
268 | * Length - Number of bytes to read | |
269 | * Buffer - Pointer to where to put the data | |
270 | * | |
271 | * RETURN: Status | |
272 | * | |
273 | * DESCRIPTION: Read data from an operation region. The read starts from the | |
274 | * beginning of the region. | |
275 | * | |
276 | ******************************************************************************/ | |
277 | ||
278 | static acpi_status | |
279 | acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer) | |
280 | { | |
281 | acpi_status status; | |
282 | acpi_integer value; | |
f5407af3 | 283 | u32 region_offset = 0; |
3c59f960 BM |
284 | u32 i; |
285 | ||
3c59f960 BM |
286 | /* Bytewise reads */ |
287 | ||
288 | for (i = 0; i < length; i++) { | |
289 | status = acpi_ev_address_space_dispatch(obj_desc, ACPI_READ, | |
f5407af3 BM |
290 | region_offset, 8, |
291 | &value); | |
3c59f960 BM |
292 | if (ACPI_FAILURE(status)) { |
293 | return status; | |
294 | } | |
295 | ||
296 | *buffer = (u8)value; | |
297 | buffer++; | |
f5407af3 | 298 | region_offset++; |
3c59f960 BM |
299 | } |
300 | ||
301 | return AE_OK; | |
302 | } | |
303 | ||
1da177e4 LT |
304 | /******************************************************************************* |
305 | * | |
306 | * FUNCTION: acpi_ex_load_op | |
307 | * | |
a6823e12 | 308 | * PARAMETERS: obj_desc - Region or Buffer/Field where the table will be |
1da177e4 LT |
309 | * obtained |
310 | * Target - Where a handle to the table will be stored | |
311 | * walk_state - Current state | |
312 | * | |
313 | * RETURN: Status | |
314 | * | |
315 | * DESCRIPTION: Load an ACPI table from a field or operation region | |
316 | * | |
a6823e12 AS |
317 | * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer |
318 | * objects before this code is reached. | |
319 | * | |
320 | * If source is an operation region, it must refer to system_memory, as | |
321 | * per the ACPI specification. | |
322 | * | |
1da177e4 LT |
323 | ******************************************************************************/ |
324 | ||
325 | acpi_status | |
4be44fcd LB |
326 | acpi_ex_load_op(union acpi_operand_object *obj_desc, |
327 | union acpi_operand_object *target, | |
328 | struct acpi_walk_state *walk_state) | |
1da177e4 | 329 | { |
4be44fcd | 330 | union acpi_operand_object *ddb_handle; |
f0e0da8a | 331 | struct acpi_table_header *table; |
428f2112 | 332 | struct acpi_table_desc table_desc; |
67a119f9 | 333 | u32 table_index; |
a6823e12 | 334 | acpi_status status; |
98af37fb | 335 | u32 length; |
1da177e4 | 336 | |
b229cf92 | 337 | ACPI_FUNCTION_TRACE(ex_load_op); |
1da177e4 | 338 | |
428f2112 | 339 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); |
a6823e12 AS |
340 | |
341 | /* Source Object can be either an op_region or a Buffer/Field */ | |
342 | ||
3371c19c | 343 | switch (obj_desc->common.type) { |
1da177e4 LT |
344 | case ACPI_TYPE_REGION: |
345 | ||
f0e0da8a DN |
346 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
347 | "Load table from Region %p\n", obj_desc)); | |
5eb69180 | 348 | |
a6823e12 AS |
349 | /* Region must be system_memory (from ACPI spec) */ |
350 | ||
351 | if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) { | |
352 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
353 | } | |
354 | ||
1da177e4 LT |
355 | /* |
356 | * If the Region Address and Length have not been previously evaluated, | |
357 | * evaluate them now and save the results. | |
358 | */ | |
359 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
4be44fcd LB |
360 | status = acpi_ds_get_region_arguments(obj_desc); |
361 | if (ACPI_FAILURE(status)) { | |
362 | return_ACPI_STATUS(status); | |
1da177e4 LT |
363 | } |
364 | } | |
365 | ||
3c59f960 BM |
366 | /* Get the table header first so we can get the table length */ |
367 | ||
368 | table = ACPI_ALLOCATE(sizeof(struct acpi_table_header)); | |
f0e0da8a DN |
369 | if (!table) { |
370 | return_ACPI_STATUS(AE_NO_MEMORY); | |
371 | } | |
372 | ||
3c59f960 BM |
373 | status = |
374 | acpi_ex_region_read(obj_desc, | |
375 | sizeof(struct acpi_table_header), | |
376 | ACPI_CAST_PTR(u8, table)); | |
f0e0da8a | 377 | length = table->length; |
3c59f960 BM |
378 | ACPI_FREE(table); |
379 | ||
380 | if (ACPI_FAILURE(status)) { | |
381 | return_ACPI_STATUS(status); | |
382 | } | |
f0e0da8a DN |
383 | |
384 | /* Must have at least an ACPI table header */ | |
385 | ||
386 | if (length < sizeof(struct acpi_table_header)) { | |
387 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
388 | } | |
389 | ||
390 | /* | |
3c59f960 BM |
391 | * The original implementation simply mapped the table, with no copy. |
392 | * However, the memory region is not guaranteed to remain stable and | |
393 | * we must copy the table to a local buffer. For example, the memory | |
394 | * region is corrupted after suspend on some machines. Dynamically | |
395 | * loaded tables are usually small, so this overhead is minimal. | |
396 | * | |
397 | * The latest implementation (5/2009) does not use a mapping at all. | |
398 | * We use the low-level operation region interface to read the table | |
399 | * instead of the obvious optimization of using a direct mapping. | |
400 | * This maintains a consistent use of operation regions across the | |
401 | * entire subsystem. This is important if additional processing must | |
402 | * be performed in the (possibly user-installed) operation region | |
403 | * handler. For example, acpi_exec and ASLTS depend on this. | |
5eb69180 | 404 | */ |
f0e0da8a DN |
405 | |
406 | /* Allocate a buffer for the table */ | |
407 | ||
408 | table_desc.pointer = ACPI_ALLOCATE(length); | |
409 | if (!table_desc.pointer) { | |
410 | return_ACPI_STATUS(AE_NO_MEMORY); | |
411 | } | |
412 | ||
3c59f960 | 413 | /* Read the entire table */ |
f0e0da8a | 414 | |
3c59f960 BM |
415 | status = acpi_ex_region_read(obj_desc, length, |
416 | ACPI_CAST_PTR(u8, | |
417 | table_desc.pointer)); | |
418 | if (ACPI_FAILURE(status)) { | |
f0e0da8a | 419 | ACPI_FREE(table_desc.pointer); |
3c59f960 | 420 | return_ACPI_STATUS(status); |
f0e0da8a DN |
421 | } |
422 | ||
a6823e12 | 423 | table_desc.address = obj_desc->region.address; |
1da177e4 LT |
424 | break; |
425 | ||
a6823e12 | 426 | case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */ |
1da177e4 | 427 | |
a6823e12 | 428 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
f0e0da8a DN |
429 | "Load table from Buffer or Field %p\n", |
430 | obj_desc)); | |
98af37fb BM |
431 | |
432 | /* Must have at least an ACPI table header */ | |
433 | ||
f0e0da8a | 434 | if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) { |
98af37fb BM |
435 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
436 | } | |
437 | ||
f0e0da8a | 438 | /* Get the actual table length from the table header */ |
98af37fb | 439 | |
f0e0da8a DN |
440 | table = |
441 | ACPI_CAST_PTR(struct acpi_table_header, | |
442 | obj_desc->buffer.pointer); | |
443 | length = table->length; | |
444 | ||
445 | /* Table cannot extend beyond the buffer */ | |
446 | ||
447 | if (length > obj_desc->buffer.length) { | |
448 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); | |
449 | } | |
450 | if (length < sizeof(struct acpi_table_header)) { | |
451 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
98af37fb BM |
452 | } |
453 | ||
5eb69180 | 454 | /* |
f0e0da8a DN |
455 | * Copy the table from the buffer because the buffer could be modified |
456 | * or even deleted in the future | |
5eb69180 | 457 | */ |
98af37fb | 458 | table_desc.pointer = ACPI_ALLOCATE(length); |
5eb69180 BM |
459 | if (!table_desc.pointer) { |
460 | return_ACPI_STATUS(AE_NO_MEMORY); | |
461 | } | |
1da177e4 | 462 | |
f0e0da8a DN |
463 | ACPI_MEMCPY(table_desc.pointer, table, length); |
464 | table_desc.address = ACPI_TO_INTEGER(table_desc.pointer); | |
1da177e4 LT |
465 | break; |
466 | ||
1da177e4 | 467 | default: |
4be44fcd | 468 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
469 | } |
470 | ||
f0e0da8a DN |
471 | /* Validate table checksum (will not get validated in tb_add_table) */ |
472 | ||
473 | status = acpi_tb_verify_checksum(table_desc.pointer, length); | |
474 | if (ACPI_FAILURE(status)) { | |
475 | ACPI_FREE(table_desc.pointer); | |
476 | return_ACPI_STATUS(status); | |
477 | } | |
478 | ||
479 | /* Complete the table descriptor */ | |
480 | ||
481 | table_desc.length = length; | |
482 | table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED; | |
483 | ||
484 | /* Install the new table into the local data structures */ | |
485 | ||
428f2112 | 486 | status = acpi_tb_add_table(&table_desc, &table_index); |
f3d2e786 | 487 | if (ACPI_FAILURE(status)) { |
0fab8997 | 488 | goto cleanup; |
f3d2e786 | 489 | } |
1da177e4 | 490 | |
0bda3f2f BM |
491 | /* |
492 | * Add the table to the namespace. | |
493 | * | |
f0e0da8a | 494 | * Note: Load the table objects relative to the root of the namespace. |
0bda3f2f BM |
495 | * This appears to go against the ACPI specification, but we do it for |
496 | * compatibility with other ACPI implementations. | |
497 | */ | |
f3d2e786 | 498 | status = |
0bda3f2f | 499 | acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle); |
4be44fcd | 500 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 501 | |
88ac00f5 RM |
502 | /* On error, table_ptr was deallocated above */ |
503 | ||
4be44fcd | 504 | return_ACPI_STATUS(status); |
1da177e4 LT |
505 | } |
506 | ||
507 | /* Store the ddb_handle into the Target operand */ | |
508 | ||
4be44fcd LB |
509 | status = acpi_ex_store(ddb_handle, target, walk_state); |
510 | if (ACPI_FAILURE(status)) { | |
511 | (void)acpi_ex_unload_table(ddb_handle); | |
1da177e4 | 512 | |
88ac00f5 | 513 | /* table_ptr was deallocated above */ |
1da177e4 | 514 | |
a13b8460 | 515 | acpi_ut_remove_reference(ddb_handle); |
4be44fcd | 516 | return_ACPI_STATUS(status); |
88ac00f5 | 517 | } |
1da177e4 | 518 | |
06366c14 LM |
519 | /* Remove the reference by added by acpi_ex_store above */ |
520 | ||
521 | acpi_ut_remove_reference(ddb_handle); | |
522 | ||
3e08e2d2 LM |
523 | /* Invoke table handler if present */ |
524 | ||
525 | if (acpi_gbl_table_handler) { | |
526 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, | |
527 | table_desc.pointer, | |
528 | acpi_gbl_table_handler_context); | |
529 | } | |
530 | ||
4be44fcd LB |
531 | cleanup: |
532 | if (ACPI_FAILURE(status)) { | |
5eb69180 | 533 | |
f0e0da8a | 534 | /* Delete allocated table buffer */ |
5eb69180 | 535 | |
a6823e12 | 536 | acpi_tb_delete_table(&table_desc); |
1da177e4 | 537 | } |
4be44fcd | 538 | return_ACPI_STATUS(status); |
1da177e4 LT |
539 | } |
540 | ||
1da177e4 LT |
541 | /******************************************************************************* |
542 | * | |
543 | * FUNCTION: acpi_ex_unload_table | |
544 | * | |
545 | * PARAMETERS: ddb_handle - Handle to a previously loaded table | |
546 | * | |
547 | * RETURN: Status | |
548 | * | |
549 | * DESCRIPTION: Unload an ACPI table | |
550 | * | |
551 | ******************************************************************************/ | |
552 | ||
4be44fcd | 553 | acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle) |
1da177e4 | 554 | { |
4be44fcd LB |
555 | acpi_status status = AE_OK; |
556 | union acpi_operand_object *table_desc = ddb_handle; | |
67a119f9 | 557 | u32 table_index; |
3e08e2d2 | 558 | struct acpi_table_header *table; |
1da177e4 | 559 | |
b229cf92 | 560 | ACPI_FUNCTION_TRACE(ex_unload_table); |
1da177e4 LT |
561 | |
562 | /* | |
563 | * Validate the handle | |
e0be6f5a | 564 | * Although the handle is partially validated in acpi_ex_reconfiguration() |
1da177e4 LT |
565 | * when it calls acpi_ex_resolve_operands(), the handle is more completely |
566 | * validated here. | |
e0be6f5a LM |
567 | * |
568 | * Handle must be a valid operand object of type reference. Also, the | |
569 | * ddb_handle must still be marked valid (table has not been previously | |
570 | * unloaded) | |
1da177e4 LT |
571 | */ |
572 | if ((!ddb_handle) || | |
4be44fcd | 573 | (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) || |
e0be6f5a LM |
574 | (ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) || |
575 | (!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) { | |
4be44fcd | 576 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
577 | } |
578 | ||
57e664cf | 579 | /* Get the table index from the ddb_handle */ |
1da177e4 | 580 | |
57e664cf | 581 | table_index = table_desc->reference.value; |
1da177e4 | 582 | |
e0be6f5a LM |
583 | /* Ensure the table is still loaded */ |
584 | ||
585 | if (!acpi_tb_is_table_loaded(table_index)) { | |
586 | return_ACPI_STATUS(AE_NOT_EXIST); | |
587 | } | |
588 | ||
3e08e2d2 LM |
589 | /* Invoke table handler if present */ |
590 | ||
591 | if (acpi_gbl_table_handler) { | |
592 | status = acpi_get_table_by_index(table_index, &table); | |
593 | if (ACPI_SUCCESS(status)) { | |
594 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD, | |
595 | table, | |
596 | acpi_gbl_table_handler_context); | |
597 | } | |
598 | } | |
599 | ||
8a335a23 BM |
600 | /* Delete the portion of the namespace owned by this table */ |
601 | ||
602 | status = acpi_tb_delete_namespace_by_owner(table_index); | |
603 | if (ACPI_FAILURE(status)) { | |
604 | return_ACPI_STATUS(status); | |
605 | } | |
1da177e4 | 606 | |
8a335a23 | 607 | (void)acpi_tb_release_owner_id(table_index); |
f3d2e786 | 608 | acpi_tb_set_table_loaded_flag(table_index, FALSE); |
1da177e4 | 609 | |
e0be6f5a LM |
610 | /* |
611 | * Invalidate the handle. We do this because the handle may be stored | |
612 | * in a named object and may not be actually deleted until much later. | |
613 | */ | |
614 | ddb_handle->common.flags &= ~AOPOBJ_DATA_VALID; | |
3e08e2d2 | 615 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 616 | } |