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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
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 | ||
44 | ||
45 | #include <acpi/acpi.h> | |
46 | #include <acpi/acinterp.h> | |
47 | #include <acpi/amlcode.h> | |
48 | #include <acpi/acnamesp.h> | |
49 | #include <acpi/acevents.h> | |
50 | #include <acpi/actables.h> | |
51 | #include <acpi/acdispat.h> | |
52 | ||
53 | ||
54 | #define _COMPONENT ACPI_EXECUTER | |
55 | ACPI_MODULE_NAME ("exconfig") | |
56 | ||
44f6c012 RM |
57 | /* Local prototypes */ |
58 | ||
59 | static acpi_status | |
60 | acpi_ex_add_table ( | |
61 | struct acpi_table_header *table, | |
62 | struct acpi_namespace_node *parent_node, | |
63 | union acpi_operand_object **ddb_handle); | |
64 | ||
1da177e4 LT |
65 | |
66 | /******************************************************************************* | |
67 | * | |
68 | * FUNCTION: acpi_ex_add_table | |
69 | * | |
70 | * PARAMETERS: Table - Pointer to raw table | |
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 |
1da177e4 LT |
82 | acpi_ex_add_table ( |
83 | struct acpi_table_header *table, | |
84 | struct acpi_namespace_node *parent_node, | |
85 | union acpi_operand_object **ddb_handle) | |
86 | { | |
87 | acpi_status status; | |
88 | struct acpi_table_desc table_info; | |
89 | union acpi_operand_object *obj_desc; | |
90 | ||
91 | ||
92 | ACPI_FUNCTION_TRACE ("ex_add_table"); | |
93 | ||
94 | ||
95 | /* Create an object to be the table handle */ | |
96 | ||
97 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_REFERENCE); | |
98 | if (!obj_desc) { | |
99 | return_ACPI_STATUS (AE_NO_MEMORY); | |
100 | } | |
101 | ||
0c9938cc RM |
102 | /* Init the table handle */ |
103 | ||
104 | obj_desc->reference.opcode = AML_LOAD_OP; | |
105 | *ddb_handle = obj_desc; | |
106 | ||
1da177e4 LT |
107 | /* Install the new table into the local data structures */ |
108 | ||
109 | ACPI_MEMSET (&table_info, 0, sizeof (struct acpi_table_desc)); | |
110 | ||
44f6c012 RM |
111 | table_info.type = ACPI_TABLE_SSDT; |
112 | table_info.pointer = table; | |
113 | table_info.length = (acpi_size) table->length; | |
114 | table_info.allocation = ACPI_MEM_ALLOCATED; | |
1da177e4 LT |
115 | |
116 | status = acpi_tb_install_table (&table_info); | |
0c9938cc RM |
117 | obj_desc->reference.object = table_info.installed_desc; |
118 | ||
1da177e4 | 119 | if (ACPI_FAILURE (status)) { |
0c9938cc RM |
120 | if (status == AE_ALREADY_EXISTS) { |
121 | /* Table already exists, just return the handle */ | |
122 | ||
123 | return_ACPI_STATUS (AE_OK); | |
124 | } | |
1da177e4 LT |
125 | goto cleanup; |
126 | } | |
127 | ||
128 | /* Add the table to the namespace */ | |
129 | ||
130 | status = acpi_ns_load_table (table_info.installed_desc, parent_node); | |
131 | if (ACPI_FAILURE (status)) { | |
132 | /* Uninstall table on error */ | |
133 | ||
134 | (void) acpi_tb_uninstall_table (table_info.installed_desc); | |
135 | goto cleanup; | |
136 | } | |
137 | ||
1da177e4 LT |
138 | return_ACPI_STATUS (AE_OK); |
139 | ||
140 | ||
141 | cleanup: | |
142 | acpi_ut_remove_reference (obj_desc); | |
0c9938cc | 143 | *ddb_handle = NULL; |
1da177e4 LT |
144 | return_ACPI_STATUS (status); |
145 | } | |
146 | ||
147 | ||
148 | /******************************************************************************* | |
149 | * | |
150 | * FUNCTION: acpi_ex_load_table_op | |
151 | * | |
152 | * PARAMETERS: walk_state - Current state with operands | |
153 | * return_desc - Where to store the return object | |
154 | * | |
155 | * RETURN: Status | |
156 | * | |
157 | * DESCRIPTION: Load an ACPI table | |
158 | * | |
159 | ******************************************************************************/ | |
160 | ||
161 | acpi_status | |
162 | acpi_ex_load_table_op ( | |
163 | struct acpi_walk_state *walk_state, | |
164 | union acpi_operand_object **return_desc) | |
165 | { | |
166 | acpi_status status; | |
167 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
168 | struct acpi_table_header *table; | |
169 | struct acpi_namespace_node *parent_node; | |
170 | struct acpi_namespace_node *start_node; | |
171 | struct acpi_namespace_node *parameter_node = NULL; | |
172 | union acpi_operand_object *ddb_handle; | |
173 | ||
174 | ||
175 | ACPI_FUNCTION_TRACE ("ex_load_table_op"); | |
176 | ||
177 | ||
178 | #if 0 | |
179 | /* | |
180 | * Make sure that the signature does not match one of the tables that | |
181 | * is already loaded. | |
182 | */ | |
183 | status = acpi_tb_match_signature (operand[0]->string.pointer, NULL); | |
184 | if (status == AE_OK) { | |
185 | /* Signature matched -- don't allow override */ | |
186 | ||
187 | return_ACPI_STATUS (AE_ALREADY_EXISTS); | |
188 | } | |
189 | #endif | |
190 | ||
191 | /* Find the ACPI table */ | |
192 | ||
193 | status = acpi_tb_find_table (operand[0]->string.pointer, | |
194 | operand[1]->string.pointer, | |
195 | operand[2]->string.pointer, &table); | |
196 | if (ACPI_FAILURE (status)) { | |
197 | if (status != AE_NOT_FOUND) { | |
198 | return_ACPI_STATUS (status); | |
199 | } | |
200 | ||
201 | /* Table not found, return an Integer=0 and AE_OK */ | |
202 | ||
203 | ddb_handle = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER); | |
204 | if (!ddb_handle) { | |
205 | return_ACPI_STATUS (AE_NO_MEMORY); | |
206 | } | |
207 | ||
208 | ddb_handle->integer.value = 0; | |
209 | *return_desc = ddb_handle; | |
210 | ||
211 | return_ACPI_STATUS (AE_OK); | |
212 | } | |
213 | ||
214 | /* Default nodes */ | |
215 | ||
216 | start_node = walk_state->scope_info->scope.node; | |
217 | parent_node = acpi_gbl_root_node; | |
218 | ||
219 | /* root_path (optional parameter) */ | |
220 | ||
221 | if (operand[3]->string.length > 0) { | |
222 | /* | |
223 | * Find the node referenced by the root_path_string. This is the | |
224 | * location within the namespace where the table will be loaded. | |
225 | */ | |
226 | status = acpi_ns_get_node_by_path (operand[3]->string.pointer, start_node, | |
227 | ACPI_NS_SEARCH_PARENT, &parent_node); | |
228 | if (ACPI_FAILURE (status)) { | |
229 | return_ACPI_STATUS (status); | |
230 | } | |
231 | } | |
232 | ||
233 | /* parameter_path (optional parameter) */ | |
234 | ||
235 | if (operand[4]->string.length > 0) { | |
236 | if ((operand[4]->string.pointer[0] != '\\') && | |
237 | (operand[4]->string.pointer[0] != '^')) { | |
238 | /* | |
239 | * Path is not absolute, so it will be relative to the node | |
240 | * referenced by the root_path_string (or the NS root if omitted) | |
241 | */ | |
242 | start_node = parent_node; | |
243 | } | |
244 | ||
44f6c012 RM |
245 | /* Find the node referenced by the parameter_path_string */ |
246 | ||
1da177e4 | 247 | status = acpi_ns_get_node_by_path (operand[4]->string.pointer, start_node, |
44f6c012 | 248 | ACPI_NS_SEARCH_PARENT, ¶meter_node); |
1da177e4 LT |
249 | if (ACPI_FAILURE (status)) { |
250 | return_ACPI_STATUS (status); | |
251 | } | |
252 | } | |
253 | ||
254 | /* Load the table into the namespace */ | |
255 | ||
256 | status = acpi_ex_add_table (table, parent_node, &ddb_handle); | |
257 | if (ACPI_FAILURE (status)) { | |
258 | return_ACPI_STATUS (status); | |
259 | } | |
260 | ||
261 | /* Parameter Data (optional) */ | |
262 | ||
263 | if (parameter_node) { | |
264 | /* Store the parameter data into the optional parameter object */ | |
265 | ||
44f6c012 RM |
266 | status = acpi_ex_store (operand[5], |
267 | ACPI_CAST_PTR (union acpi_operand_object, parameter_node), | |
1da177e4 LT |
268 | walk_state); |
269 | if (ACPI_FAILURE (status)) { | |
270 | (void) acpi_ex_unload_table (ddb_handle); | |
271 | return_ACPI_STATUS (status); | |
272 | } | |
273 | } | |
274 | ||
275 | *return_desc = ddb_handle; | |
276 | return_ACPI_STATUS (status); | |
277 | } | |
278 | ||
279 | ||
280 | /******************************************************************************* | |
281 | * | |
282 | * FUNCTION: acpi_ex_load_op | |
283 | * | |
284 | * PARAMETERS: obj_desc - Region or Field where the table will be | |
285 | * obtained | |
286 | * Target - Where a handle to the table will be stored | |
287 | * walk_state - Current state | |
288 | * | |
289 | * RETURN: Status | |
290 | * | |
291 | * DESCRIPTION: Load an ACPI table from a field or operation region | |
292 | * | |
293 | ******************************************************************************/ | |
294 | ||
295 | acpi_status | |
296 | acpi_ex_load_op ( | |
297 | union acpi_operand_object *obj_desc, | |
298 | union acpi_operand_object *target, | |
299 | struct acpi_walk_state *walk_state) | |
300 | { | |
301 | acpi_status status; | |
302 | union acpi_operand_object *ddb_handle; | |
303 | union acpi_operand_object *buffer_desc = NULL; | |
304 | struct acpi_table_header *table_ptr = NULL; | |
305 | acpi_physical_address address; | |
306 | struct acpi_table_header table_header; | |
307 | u32 i; | |
308 | ||
309 | ACPI_FUNCTION_TRACE ("ex_load_op"); | |
310 | ||
311 | ||
312 | /* Object can be either an op_region or a Field */ | |
313 | ||
314 | switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { | |
315 | case ACPI_TYPE_REGION: | |
316 | ||
317 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Region %p %s\n", | |
318 | obj_desc, acpi_ut_get_object_type_name (obj_desc))); | |
319 | ||
320 | /* | |
321 | * If the Region Address and Length have not been previously evaluated, | |
322 | * evaluate them now and save the results. | |
323 | */ | |
324 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
325 | status = acpi_ds_get_region_arguments (obj_desc); | |
326 | if (ACPI_FAILURE (status)) { | |
327 | return_ACPI_STATUS (status); | |
328 | } | |
329 | } | |
330 | ||
331 | /* Get the base physical address of the region */ | |
332 | ||
333 | address = obj_desc->region.address; | |
334 | ||
335 | /* Get the table length from the table header */ | |
336 | ||
337 | table_header.length = 0; | |
338 | for (i = 0; i < 8; i++) { | |
339 | status = acpi_ev_address_space_dispatch (obj_desc, ACPI_READ, | |
340 | (acpi_physical_address) (i + address), 8, | |
341 | ((u8 *) &table_header) + i); | |
342 | if (ACPI_FAILURE (status)) { | |
343 | return_ACPI_STATUS (status); | |
344 | } | |
345 | } | |
346 | ||
347 | /* Sanity check the table length */ | |
348 | ||
349 | if (table_header.length < sizeof (struct acpi_table_header)) { | |
350 | return_ACPI_STATUS (AE_BAD_HEADER); | |
351 | } | |
352 | ||
353 | /* Allocate a buffer for the entire table */ | |
354 | ||
355 | table_ptr = ACPI_MEM_ALLOCATE (table_header.length); | |
356 | if (!table_ptr) { | |
357 | return_ACPI_STATUS (AE_NO_MEMORY); | |
358 | } | |
359 | ||
360 | /* Get the entire table from the op region */ | |
361 | ||
362 | for (i = 0; i < table_header.length; i++) { | |
363 | status = acpi_ev_address_space_dispatch (obj_desc, ACPI_READ, | |
364 | (acpi_physical_address) (i + address), 8, | |
365 | ((u8 *) table_ptr + i)); | |
366 | if (ACPI_FAILURE (status)) { | |
367 | goto cleanup; | |
368 | } | |
369 | } | |
370 | break; | |
371 | ||
372 | ||
373 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
374 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
375 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
376 | ||
377 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Field %p %s\n", | |
378 | obj_desc, acpi_ut_get_object_type_name (obj_desc))); | |
379 | ||
380 | /* | |
381 | * The length of the field must be at least as large as the table. | |
382 | * Read the entire field and thus the entire table. Buffer is | |
383 | * allocated during the read. | |
384 | */ | |
385 | status = acpi_ex_read_data_from_field (walk_state, obj_desc, &buffer_desc); | |
386 | if (ACPI_FAILURE (status)) { | |
88ac00f5 | 387 | return_ACPI_STATUS (status); |
1da177e4 LT |
388 | } |
389 | ||
44f6c012 RM |
390 | table_ptr = ACPI_CAST_PTR (struct acpi_table_header, |
391 | buffer_desc->buffer.pointer); | |
1da177e4 | 392 | |
88ac00f5 RM |
393 | /* All done with the buffer_desc, delete it */ |
394 | ||
395 | buffer_desc->buffer.pointer = NULL; | |
396 | acpi_ut_remove_reference (buffer_desc); | |
397 | ||
398 | /* Sanity check the table length */ | |
1da177e4 LT |
399 | |
400 | if (table_ptr->length < sizeof (struct acpi_table_header)) { | |
88ac00f5 RM |
401 | status = AE_BAD_HEADER; |
402 | goto cleanup; | |
1da177e4 LT |
403 | } |
404 | break; | |
405 | ||
406 | ||
407 | default: | |
408 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); | |
409 | } | |
410 | ||
411 | /* The table must be either an SSDT or a PSDT */ | |
412 | ||
413 | if ((!ACPI_STRNCMP (table_ptr->signature, | |
414 | acpi_gbl_table_data[ACPI_TABLE_PSDT].signature, | |
415 | acpi_gbl_table_data[ACPI_TABLE_PSDT].sig_length)) && | |
416 | (!ACPI_STRNCMP (table_ptr->signature, | |
417 | acpi_gbl_table_data[ACPI_TABLE_SSDT].signature, | |
418 | acpi_gbl_table_data[ACPI_TABLE_SSDT].sig_length))) { | |
419 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
420 | "Table has invalid signature [%4.4s], must be SSDT or PSDT\n", | |
421 | table_ptr->signature)); | |
422 | status = AE_BAD_SIGNATURE; | |
423 | goto cleanup; | |
424 | } | |
425 | ||
426 | /* Install the new table into the local data structures */ | |
427 | ||
428 | status = acpi_ex_add_table (table_ptr, acpi_gbl_root_node, &ddb_handle); | |
429 | if (ACPI_FAILURE (status)) { | |
88ac00f5 RM |
430 | /* On error, table_ptr was deallocated above */ |
431 | ||
432 | return_ACPI_STATUS (status); | |
1da177e4 LT |
433 | } |
434 | ||
435 | /* Store the ddb_handle into the Target operand */ | |
436 | ||
437 | status = acpi_ex_store (ddb_handle, target, walk_state); | |
438 | if (ACPI_FAILURE (status)) { | |
439 | (void) acpi_ex_unload_table (ddb_handle); | |
1da177e4 | 440 | |
88ac00f5 | 441 | /* table_ptr was deallocated above */ |
1da177e4 | 442 | |
88ac00f5 RM |
443 | return_ACPI_STATUS (status); |
444 | } | |
1da177e4 LT |
445 | |
446 | cleanup: | |
88ac00f5 | 447 | if (ACPI_FAILURE (status)) { |
1da177e4 LT |
448 | ACPI_MEM_FREE (table_ptr); |
449 | } | |
450 | return_ACPI_STATUS (status); | |
451 | } | |
452 | ||
453 | ||
454 | /******************************************************************************* | |
455 | * | |
456 | * FUNCTION: acpi_ex_unload_table | |
457 | * | |
458 | * PARAMETERS: ddb_handle - Handle to a previously loaded table | |
459 | * | |
460 | * RETURN: Status | |
461 | * | |
462 | * DESCRIPTION: Unload an ACPI table | |
463 | * | |
464 | ******************************************************************************/ | |
465 | ||
466 | acpi_status | |
467 | acpi_ex_unload_table ( | |
468 | union acpi_operand_object *ddb_handle) | |
469 | { | |
470 | acpi_status status = AE_OK; | |
471 | union acpi_operand_object *table_desc = ddb_handle; | |
472 | struct acpi_table_desc *table_info; | |
473 | ||
474 | ||
475 | ACPI_FUNCTION_TRACE ("ex_unload_table"); | |
476 | ||
477 | ||
478 | /* | |
479 | * Validate the handle | |
480 | * Although the handle is partially validated in acpi_ex_reconfiguration(), | |
481 | * when it calls acpi_ex_resolve_operands(), the handle is more completely | |
482 | * validated here. | |
483 | */ | |
484 | if ((!ddb_handle) || | |
485 | (ACPI_GET_DESCRIPTOR_TYPE (ddb_handle) != ACPI_DESC_TYPE_OPERAND) || | |
486 | (ACPI_GET_OBJECT_TYPE (ddb_handle) != ACPI_TYPE_LOCAL_REFERENCE)) { | |
487 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
488 | } | |
489 | ||
490 | /* Get the actual table descriptor from the ddb_handle */ | |
491 | ||
492 | table_info = (struct acpi_table_desc *) table_desc->reference.object; | |
493 | ||
494 | /* | |
495 | * Delete the entire namespace under this table Node | |
496 | * (Offset contains the table_id) | |
497 | */ | |
f9f4601f | 498 | acpi_ns_delete_namespace_by_owner (table_info->owner_id); |
0c9938cc | 499 | acpi_ut_release_owner_id (&table_info->owner_id); |
1da177e4 LT |
500 | |
501 | /* Delete the table itself */ | |
502 | ||
503 | (void) acpi_tb_uninstall_table (table_info->installed_desc); | |
504 | ||
505 | /* Delete the table descriptor (ddb_handle) */ | |
506 | ||
507 | acpi_ut_remove_reference (table_desc); | |
508 | return_ACPI_STATUS (status); | |
509 | } | |
510 |