Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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(); | |
121 | acpi_ns_exec_module_code_list(); | |
122 | acpi_ex_enter_interpreter(); | |
123 | ||
75c8044f LZ |
124 | /* |
125 | * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is | |
126 | * responsible for discovering any new wake GPEs by running _PRW methods | |
127 | * that may have been loaded by this table. | |
128 | */ | |
186c307f BM |
129 | status = acpi_tb_get_owner_id(table_index, &owner_id); |
130 | if (ACPI_SUCCESS(status)) { | |
131 | acpi_ev_update_gpes(owner_id); | |
132 | } | |
133 | ||
134 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
135 | } |
136 | ||
1da177e4 LT |
137 | /******************************************************************************* |
138 | * | |
139 | * FUNCTION: acpi_ex_load_table_op | |
140 | * | |
141 | * PARAMETERS: walk_state - Current state with operands | |
142 | * return_desc - Where to store the return object | |
143 | * | |
144 | * RETURN: Status | |
145 | * | |
a6823e12 | 146 | * DESCRIPTION: Load an ACPI table from the RSDT/XSDT |
1da177e4 LT |
147 | * |
148 | ******************************************************************************/ | |
149 | ||
150 | acpi_status | |
4be44fcd LB |
151 | acpi_ex_load_table_op(struct acpi_walk_state *walk_state, |
152 | union acpi_operand_object **return_desc) | |
1da177e4 | 153 | { |
4be44fcd LB |
154 | acpi_status status; |
155 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
4be44fcd LB |
156 | struct acpi_namespace_node *parent_node; |
157 | struct acpi_namespace_node *start_node; | |
158 | struct acpi_namespace_node *parameter_node = NULL; | |
159 | union acpi_operand_object *ddb_handle; | |
f3d2e786 | 160 | struct acpi_table_header *table; |
67a119f9 | 161 | u32 table_index; |
1da177e4 | 162 | |
b229cf92 | 163 | ACPI_FUNCTION_TRACE(ex_load_table_op); |
1da177e4 | 164 | |
75c8044f | 165 | /* Validate lengths for the Signature, oem_id, and oem_table_id strings */ |
49718b17 LM |
166 | |
167 | if ((operand[0]->string.length > ACPI_NAME_SIZE) || | |
168 | (operand[1]->string.length > ACPI_OEM_ID_SIZE) || | |
169 | (operand[2]->string.length > ACPI_OEM_TABLE_ID_SIZE)) { | |
528a412c | 170 | return_ACPI_STATUS(AE_AML_STRING_LIMIT); |
49718b17 LM |
171 | } |
172 | ||
a6823e12 | 173 | /* Find the ACPI table in the RSDT/XSDT */ |
1da177e4 | 174 | |
4be44fcd LB |
175 | status = acpi_tb_find_table(operand[0]->string.pointer, |
176 | operand[1]->string.pointer, | |
f3d2e786 | 177 | operand[2]->string.pointer, &table_index); |
4be44fcd | 178 | if (ACPI_FAILURE(status)) { |
1da177e4 | 179 | if (status != AE_NOT_FOUND) { |
4be44fcd | 180 | return_ACPI_STATUS(status); |
1da177e4 LT |
181 | } |
182 | ||
183 | /* Table not found, return an Integer=0 and AE_OK */ | |
184 | ||
dc95a270 | 185 | ddb_handle = acpi_ut_create_integer_object((u64) 0); |
1da177e4 | 186 | if (!ddb_handle) { |
4be44fcd | 187 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
188 | } |
189 | ||
1da177e4 | 190 | *return_desc = ddb_handle; |
4be44fcd | 191 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
192 | } |
193 | ||
194 | /* Default nodes */ | |
195 | ||
196 | start_node = walk_state->scope_info->scope.node; | |
197 | parent_node = acpi_gbl_root_node; | |
198 | ||
199 | /* root_path (optional parameter) */ | |
200 | ||
201 | if (operand[3]->string.length > 0) { | |
202 | /* | |
203 | * Find the node referenced by the root_path_string. This is the | |
204 | * location within the namespace where the table will be loaded. | |
205 | */ | |
4be44fcd | 206 | status = |
4119532c BM |
207 | acpi_ns_get_node(start_node, operand[3]->string.pointer, |
208 | ACPI_NS_SEARCH_PARENT, &parent_node); | |
4be44fcd LB |
209 | if (ACPI_FAILURE(status)) { |
210 | return_ACPI_STATUS(status); | |
1da177e4 LT |
211 | } |
212 | } | |
213 | ||
214 | /* parameter_path (optional parameter) */ | |
215 | ||
216 | if (operand[4]->string.length > 0) { | |
528a412c BM |
217 | if ((operand[4]->string.pointer[0] != AML_ROOT_PREFIX) && |
218 | (operand[4]->string.pointer[0] != AML_PARENT_PREFIX)) { | |
1da177e4 LT |
219 | /* |
220 | * Path is not absolute, so it will be relative to the node | |
221 | * referenced by the root_path_string (or the NS root if omitted) | |
222 | */ | |
223 | start_node = parent_node; | |
224 | } | |
225 | ||
44f6c012 RM |
226 | /* Find the node referenced by the parameter_path_string */ |
227 | ||
4be44fcd | 228 | status = |
4119532c BM |
229 | acpi_ns_get_node(start_node, operand[4]->string.pointer, |
230 | ACPI_NS_SEARCH_PARENT, ¶meter_node); | |
4be44fcd LB |
231 | if (ACPI_FAILURE(status)) { |
232 | return_ACPI_STATUS(status); | |
1da177e4 LT |
233 | } |
234 | } | |
235 | ||
236 | /* Load the table into the namespace */ | |
237 | ||
f3d2e786 | 238 | status = acpi_ex_add_table(table_index, parent_node, &ddb_handle); |
4be44fcd LB |
239 | if (ACPI_FAILURE(status)) { |
240 | return_ACPI_STATUS(status); | |
1da177e4 LT |
241 | } |
242 | ||
243 | /* Parameter Data (optional) */ | |
244 | ||
245 | if (parameter_node) { | |
52fc0b02 | 246 | |
1da177e4 LT |
247 | /* Store the parameter data into the optional parameter object */ |
248 | ||
4be44fcd LB |
249 | status = acpi_ex_store(operand[5], |
250 | ACPI_CAST_PTR(union acpi_operand_object, | |
251 | parameter_node), | |
252 | walk_state); | |
253 | if (ACPI_FAILURE(status)) { | |
254 | (void)acpi_ex_unload_table(ddb_handle); | |
06366c14 LM |
255 | |
256 | acpi_ut_remove_reference(ddb_handle); | |
4be44fcd | 257 | return_ACPI_STATUS(status); |
1da177e4 LT |
258 | } |
259 | } | |
260 | ||
f3d2e786 BM |
261 | status = acpi_get_table_by_index(table_index, &table); |
262 | if (ACPI_SUCCESS(status)) { | |
186c307f BM |
263 | ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:")); |
264 | acpi_tb_print_table_header(0, table); | |
f3d2e786 | 265 | } |
967440e3 | 266 | |
3e08e2d2 LM |
267 | /* Invoke table handler if present */ |
268 | ||
269 | if (acpi_gbl_table_handler) { | |
270 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table, | |
271 | acpi_gbl_table_handler_context); | |
272 | } | |
273 | ||
1da177e4 | 274 | *return_desc = ddb_handle; |
4be44fcd | 275 | return_ACPI_STATUS(status); |
1da177e4 LT |
276 | } |
277 | ||
3c59f960 BM |
278 | /******************************************************************************* |
279 | * | |
280 | * FUNCTION: acpi_ex_region_read | |
281 | * | |
282 | * PARAMETERS: obj_desc - Region descriptor | |
ba494bee BM |
283 | * length - Number of bytes to read |
284 | * buffer - Pointer to where to put the data | |
3c59f960 BM |
285 | * |
286 | * RETURN: Status | |
287 | * | |
288 | * DESCRIPTION: Read data from an operation region. The read starts from the | |
289 | * beginning of the region. | |
290 | * | |
291 | ******************************************************************************/ | |
292 | ||
293 | static acpi_status | |
294 | acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer) | |
295 | { | |
296 | acpi_status status; | |
5df7e6cb | 297 | u64 value; |
f5407af3 | 298 | u32 region_offset = 0; |
3c59f960 BM |
299 | u32 i; |
300 | ||
3c59f960 BM |
301 | /* Bytewise reads */ |
302 | ||
303 | for (i = 0; i < length; i++) { | |
9ce81784 BM |
304 | status = |
305 | acpi_ev_address_space_dispatch(obj_desc, NULL, ACPI_READ, | |
306 | region_offset, 8, &value); | |
3c59f960 | 307 | if (ACPI_FAILURE(status)) { |
9c0d7939 | 308 | return (status); |
3c59f960 BM |
309 | } |
310 | ||
311 | *buffer = (u8)value; | |
312 | buffer++; | |
f5407af3 | 313 | region_offset++; |
3c59f960 BM |
314 | } |
315 | ||
9c0d7939 | 316 | return (AE_OK); |
3c59f960 BM |
317 | } |
318 | ||
1da177e4 LT |
319 | /******************************************************************************* |
320 | * | |
321 | * FUNCTION: acpi_ex_load_op | |
322 | * | |
a6823e12 | 323 | * PARAMETERS: obj_desc - Region or Buffer/Field where the table will be |
1da177e4 | 324 | * obtained |
ba494bee | 325 | * target - Where a handle to the table will be stored |
1da177e4 LT |
326 | * walk_state - Current state |
327 | * | |
328 | * RETURN: Status | |
329 | * | |
330 | * DESCRIPTION: Load an ACPI table from a field or operation region | |
331 | * | |
a6823e12 AS |
332 | * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer |
333 | * objects before this code is reached. | |
334 | * | |
335 | * If source is an operation region, it must refer to system_memory, as | |
336 | * per the ACPI specification. | |
337 | * | |
1da177e4 LT |
338 | ******************************************************************************/ |
339 | ||
340 | acpi_status | |
4be44fcd LB |
341 | acpi_ex_load_op(union acpi_operand_object *obj_desc, |
342 | union acpi_operand_object *target, | |
343 | struct acpi_walk_state *walk_state) | |
1da177e4 | 344 | { |
4be44fcd | 345 | union acpi_operand_object *ddb_handle; |
f0e0da8a | 346 | struct acpi_table_header *table; |
428f2112 | 347 | struct acpi_table_desc table_desc; |
67a119f9 | 348 | u32 table_index; |
a6823e12 | 349 | acpi_status status; |
98af37fb | 350 | u32 length; |
1da177e4 | 351 | |
b229cf92 | 352 | ACPI_FUNCTION_TRACE(ex_load_op); |
1da177e4 | 353 | |
428f2112 | 354 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); |
a6823e12 AS |
355 | |
356 | /* Source Object can be either an op_region or a Buffer/Field */ | |
357 | ||
3371c19c | 358 | switch (obj_desc->common.type) { |
1da177e4 LT |
359 | case ACPI_TYPE_REGION: |
360 | ||
f0e0da8a DN |
361 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
362 | "Load table from Region %p\n", obj_desc)); | |
5eb69180 | 363 | |
a6823e12 AS |
364 | /* Region must be system_memory (from ACPI spec) */ |
365 | ||
366 | if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) { | |
367 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
368 | } | |
369 | ||
1da177e4 LT |
370 | /* |
371 | * If the Region Address and Length have not been previously evaluated, | |
372 | * evaluate them now and save the results. | |
373 | */ | |
374 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
4be44fcd LB |
375 | status = acpi_ds_get_region_arguments(obj_desc); |
376 | if (ACPI_FAILURE(status)) { | |
377 | return_ACPI_STATUS(status); | |
1da177e4 LT |
378 | } |
379 | } | |
380 | ||
3c59f960 BM |
381 | /* Get the table header first so we can get the table length */ |
382 | ||
383 | table = ACPI_ALLOCATE(sizeof(struct acpi_table_header)); | |
f0e0da8a DN |
384 | if (!table) { |
385 | return_ACPI_STATUS(AE_NO_MEMORY); | |
386 | } | |
387 | ||
3c59f960 BM |
388 | status = |
389 | acpi_ex_region_read(obj_desc, | |
390 | sizeof(struct acpi_table_header), | |
391 | ACPI_CAST_PTR(u8, table)); | |
f0e0da8a | 392 | length = table->length; |
3c59f960 BM |
393 | ACPI_FREE(table); |
394 | ||
395 | if (ACPI_FAILURE(status)) { | |
396 | return_ACPI_STATUS(status); | |
397 | } | |
f0e0da8a DN |
398 | |
399 | /* Must have at least an ACPI table header */ | |
400 | ||
401 | if (length < sizeof(struct acpi_table_header)) { | |
402 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
403 | } | |
404 | ||
405 | /* | |
3c59f960 BM |
406 | * The original implementation simply mapped the table, with no copy. |
407 | * However, the memory region is not guaranteed to remain stable and | |
408 | * we must copy the table to a local buffer. For example, the memory | |
409 | * region is corrupted after suspend on some machines. Dynamically | |
410 | * loaded tables are usually small, so this overhead is minimal. | |
411 | * | |
412 | * The latest implementation (5/2009) does not use a mapping at all. | |
413 | * We use the low-level operation region interface to read the table | |
414 | * instead of the obvious optimization of using a direct mapping. | |
415 | * This maintains a consistent use of operation regions across the | |
416 | * entire subsystem. This is important if additional processing must | |
417 | * be performed in the (possibly user-installed) operation region | |
418 | * handler. For example, acpi_exec and ASLTS depend on this. | |
5eb69180 | 419 | */ |
f0e0da8a DN |
420 | |
421 | /* Allocate a buffer for the table */ | |
422 | ||
423 | table_desc.pointer = ACPI_ALLOCATE(length); | |
424 | if (!table_desc.pointer) { | |
425 | return_ACPI_STATUS(AE_NO_MEMORY); | |
426 | } | |
427 | ||
3c59f960 | 428 | /* Read the entire table */ |
f0e0da8a | 429 | |
3c59f960 BM |
430 | status = acpi_ex_region_read(obj_desc, length, |
431 | ACPI_CAST_PTR(u8, | |
432 | table_desc.pointer)); | |
433 | if (ACPI_FAILURE(status)) { | |
f0e0da8a | 434 | ACPI_FREE(table_desc.pointer); |
3c59f960 | 435 | return_ACPI_STATUS(status); |
f0e0da8a DN |
436 | } |
437 | ||
a6823e12 | 438 | table_desc.address = obj_desc->region.address; |
1da177e4 LT |
439 | break; |
440 | ||
a6823e12 | 441 | case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */ |
1da177e4 | 442 | |
a6823e12 | 443 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
f0e0da8a DN |
444 | "Load table from Buffer or Field %p\n", |
445 | obj_desc)); | |
98af37fb BM |
446 | |
447 | /* Must have at least an ACPI table header */ | |
448 | ||
f0e0da8a | 449 | if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) { |
98af37fb BM |
450 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
451 | } | |
452 | ||
f0e0da8a | 453 | /* Get the actual table length from the table header */ |
98af37fb | 454 | |
f0e0da8a DN |
455 | table = |
456 | ACPI_CAST_PTR(struct acpi_table_header, | |
457 | obj_desc->buffer.pointer); | |
458 | length = table->length; | |
459 | ||
460 | /* Table cannot extend beyond the buffer */ | |
461 | ||
462 | if (length > obj_desc->buffer.length) { | |
463 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); | |
464 | } | |
465 | if (length < sizeof(struct acpi_table_header)) { | |
466 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); | |
98af37fb BM |
467 | } |
468 | ||
5eb69180 | 469 | /* |
f0e0da8a DN |
470 | * Copy the table from the buffer because the buffer could be modified |
471 | * or even deleted in the future | |
5eb69180 | 472 | */ |
98af37fb | 473 | table_desc.pointer = ACPI_ALLOCATE(length); |
5eb69180 BM |
474 | if (!table_desc.pointer) { |
475 | return_ACPI_STATUS(AE_NO_MEMORY); | |
476 | } | |
1da177e4 | 477 | |
f0e0da8a DN |
478 | ACPI_MEMCPY(table_desc.pointer, table, length); |
479 | table_desc.address = ACPI_TO_INTEGER(table_desc.pointer); | |
1da177e4 LT |
480 | break; |
481 | ||
1da177e4 | 482 | default: |
1d1ea1b7 | 483 | |
4be44fcd | 484 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
485 | } |
486 | ||
f0e0da8a DN |
487 | /* Validate table checksum (will not get validated in tb_add_table) */ |
488 | ||
489 | status = acpi_tb_verify_checksum(table_desc.pointer, length); | |
490 | if (ACPI_FAILURE(status)) { | |
491 | ACPI_FREE(table_desc.pointer); | |
492 | return_ACPI_STATUS(status); | |
493 | } | |
494 | ||
495 | /* Complete the table descriptor */ | |
496 | ||
497 | table_desc.length = length; | |
498 | table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED; | |
499 | ||
500 | /* Install the new table into the local data structures */ | |
501 | ||
428f2112 | 502 | status = acpi_tb_add_table(&table_desc, &table_index); |
f3d2e786 | 503 | if (ACPI_FAILURE(status)) { |
2147d3f0 BM |
504 | |
505 | /* Delete allocated table buffer */ | |
506 | ||
507 | acpi_tb_delete_table(&table_desc); | |
508 | return_ACPI_STATUS(status); | |
f3d2e786 | 509 | } |
1da177e4 | 510 | |
0bda3f2f BM |
511 | /* |
512 | * Add the table to the namespace. | |
513 | * | |
f0e0da8a | 514 | * Note: Load the table objects relative to the root of the namespace. |
0bda3f2f BM |
515 | * This appears to go against the ACPI specification, but we do it for |
516 | * compatibility with other ACPI implementations. | |
517 | */ | |
f3d2e786 | 518 | status = |
0bda3f2f | 519 | acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle); |
4be44fcd | 520 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 521 | |
88ac00f5 RM |
522 | /* On error, table_ptr was deallocated above */ |
523 | ||
4be44fcd | 524 | return_ACPI_STATUS(status); |
1da177e4 LT |
525 | } |
526 | ||
527 | /* Store the ddb_handle into the Target operand */ | |
528 | ||
4be44fcd LB |
529 | status = acpi_ex_store(ddb_handle, target, walk_state); |
530 | if (ACPI_FAILURE(status)) { | |
531 | (void)acpi_ex_unload_table(ddb_handle); | |
1da177e4 | 532 | |
88ac00f5 | 533 | /* table_ptr was deallocated above */ |
1da177e4 | 534 | |
a13b8460 | 535 | acpi_ut_remove_reference(ddb_handle); |
4be44fcd | 536 | return_ACPI_STATUS(status); |
88ac00f5 | 537 | } |
1da177e4 | 538 | |
186c307f BM |
539 | ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:")); |
540 | acpi_tb_print_table_header(0, table_desc.pointer); | |
541 | ||
06366c14 LM |
542 | /* Remove the reference by added by acpi_ex_store above */ |
543 | ||
544 | acpi_ut_remove_reference(ddb_handle); | |
545 | ||
3e08e2d2 LM |
546 | /* Invoke table handler if present */ |
547 | ||
548 | if (acpi_gbl_table_handler) { | |
549 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, | |
550 | table_desc.pointer, | |
551 | acpi_gbl_table_handler_context); | |
552 | } | |
553 | ||
4be44fcd | 554 | return_ACPI_STATUS(status); |
1da177e4 LT |
555 | } |
556 | ||
1da177e4 LT |
557 | /******************************************************************************* |
558 | * | |
559 | * FUNCTION: acpi_ex_unload_table | |
560 | * | |
561 | * PARAMETERS: ddb_handle - Handle to a previously loaded table | |
562 | * | |
563 | * RETURN: Status | |
564 | * | |
565 | * DESCRIPTION: Unload an ACPI table | |
566 | * | |
567 | ******************************************************************************/ | |
568 | ||
4be44fcd | 569 | acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle) |
1da177e4 | 570 | { |
4be44fcd LB |
571 | acpi_status status = AE_OK; |
572 | union acpi_operand_object *table_desc = ddb_handle; | |
67a119f9 | 573 | u32 table_index; |
3e08e2d2 | 574 | struct acpi_table_header *table; |
1da177e4 | 575 | |
b229cf92 | 576 | ACPI_FUNCTION_TRACE(ex_unload_table); |
1da177e4 LT |
577 | |
578 | /* | |
579 | * Validate the handle | |
e0be6f5a | 580 | * Although the handle is partially validated in acpi_ex_reconfiguration() |
1da177e4 LT |
581 | * when it calls acpi_ex_resolve_operands(), the handle is more completely |
582 | * validated here. | |
e0be6f5a LM |
583 | * |
584 | * Handle must be a valid operand object of type reference. Also, the | |
585 | * ddb_handle must still be marked valid (table has not been previously | |
586 | * unloaded) | |
1da177e4 LT |
587 | */ |
588 | if ((!ddb_handle) || | |
4be44fcd | 589 | (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) || |
e0be6f5a LM |
590 | (ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) || |
591 | (!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) { | |
f6f57f60 | 592 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
593 | } |
594 | ||
57e664cf | 595 | /* Get the table index from the ddb_handle */ |
1da177e4 | 596 | |
57e664cf | 597 | table_index = table_desc->reference.value; |
1da177e4 | 598 | |
e0be6f5a LM |
599 | /* Ensure the table is still loaded */ |
600 | ||
601 | if (!acpi_tb_is_table_loaded(table_index)) { | |
602 | return_ACPI_STATUS(AE_NOT_EXIST); | |
603 | } | |
604 | ||
3e08e2d2 LM |
605 | /* Invoke table handler if present */ |
606 | ||
607 | if (acpi_gbl_table_handler) { | |
608 | status = acpi_get_table_by_index(table_index, &table); | |
609 | if (ACPI_SUCCESS(status)) { | |
610 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD, | |
611 | table, | |
612 | acpi_gbl_table_handler_context); | |
613 | } | |
614 | } | |
615 | ||
8a335a23 BM |
616 | /* Delete the portion of the namespace owned by this table */ |
617 | ||
618 | status = acpi_tb_delete_namespace_by_owner(table_index); | |
619 | if (ACPI_FAILURE(status)) { | |
620 | return_ACPI_STATUS(status); | |
621 | } | |
1da177e4 | 622 | |
8a335a23 | 623 | (void)acpi_tb_release_owner_id(table_index); |
f3d2e786 | 624 | acpi_tb_set_table_loaded_flag(table_index, FALSE); |
1da177e4 | 625 | |
e0be6f5a LM |
626 | /* |
627 | * Invalidate the handle. We do this because the handle may be stored | |
628 | * in a named object and may not be actually deleted until much later. | |
629 | */ | |
630 | ddb_handle->common.flags &= ~AOPOBJ_DATA_VALID; | |
3e08e2d2 | 631 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 632 | } |