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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
6c9deb72 | 8 | * Copyright (C) 2000 - 2007, R. Byron Moore |
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 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acinterp.h> | |
46 | #include <acpi/amlcode.h> | |
47 | #include <acpi/acnamesp.h> | |
48 | #include <acpi/acevents.h> | |
49 | #include <acpi/actables.h> | |
50 | #include <acpi/acdispat.h> | |
51 | ||
1da177e4 | 52 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 53 | ACPI_MODULE_NAME("exconfig") |
1da177e4 | 54 | |
44f6c012 | 55 | /* Local prototypes */ |
44f6c012 | 56 | static acpi_status |
f3d2e786 | 57 | acpi_ex_add_table(acpi_native_uint table_index, |
4be44fcd LB |
58 | struct acpi_namespace_node *parent_node, |
59 | union acpi_operand_object **ddb_handle); | |
1da177e4 LT |
60 | |
61 | /******************************************************************************* | |
62 | * | |
63 | * FUNCTION: acpi_ex_add_table | |
64 | * | |
65 | * PARAMETERS: Table - Pointer to raw table | |
66 | * parent_node - Where to load the table (scope) | |
67 | * ddb_handle - Where to return the table handle. | |
68 | * | |
69 | * RETURN: Status | |
70 | * | |
71 | * DESCRIPTION: Common function to Install and Load an ACPI table with a | |
72 | * returned table handle. | |
73 | * | |
74 | ******************************************************************************/ | |
75 | ||
44f6c012 | 76 | static acpi_status |
f3d2e786 | 77 | acpi_ex_add_table(acpi_native_uint table_index, |
4be44fcd LB |
78 | struct acpi_namespace_node *parent_node, |
79 | union acpi_operand_object **ddb_handle) | |
1da177e4 | 80 | { |
4be44fcd | 81 | acpi_status status; |
4be44fcd | 82 | union acpi_operand_object *obj_desc; |
1da177e4 | 83 | |
b229cf92 | 84 | ACPI_FUNCTION_TRACE(ex_add_table); |
1da177e4 LT |
85 | |
86 | /* Create an object to be the table handle */ | |
87 | ||
4be44fcd | 88 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE); |
1da177e4 | 89 | if (!obj_desc) { |
4be44fcd | 90 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
91 | } |
92 | ||
0c9938cc RM |
93 | /* Init the table handle */ |
94 | ||
95 | obj_desc->reference.opcode = AML_LOAD_OP; | |
96 | *ddb_handle = obj_desc; | |
97 | ||
1da177e4 LT |
98 | /* Install the new table into the local data structures */ |
99 | ||
f3d2e786 | 100 | obj_desc->reference.object = ACPI_CAST_PTR(void, table_index); |
1da177e4 LT |
101 | |
102 | /* Add the table to the namespace */ | |
103 | ||
f3d2e786 | 104 | status = acpi_ns_load_table(table_index, parent_node); |
4be44fcd | 105 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
106 | acpi_ut_remove_reference(obj_desc); |
107 | *ddb_handle = NULL; | |
1da177e4 LT |
108 | } |
109 | ||
4be44fcd | 110 | return_ACPI_STATUS(status); |
1da177e4 LT |
111 | } |
112 | ||
1da177e4 LT |
113 | /******************************************************************************* |
114 | * | |
115 | * FUNCTION: acpi_ex_load_table_op | |
116 | * | |
117 | * PARAMETERS: walk_state - Current state with operands | |
118 | * return_desc - Where to store the return object | |
119 | * | |
120 | * RETURN: Status | |
121 | * | |
a6823e12 | 122 | * DESCRIPTION: Load an ACPI table from the RSDT/XSDT |
1da177e4 LT |
123 | * |
124 | ******************************************************************************/ | |
125 | ||
126 | acpi_status | |
4be44fcd LB |
127 | acpi_ex_load_table_op(struct acpi_walk_state *walk_state, |
128 | union acpi_operand_object **return_desc) | |
1da177e4 | 129 | { |
4be44fcd LB |
130 | acpi_status status; |
131 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
f3d2e786 | 132 | acpi_native_uint table_index; |
4be44fcd LB |
133 | struct acpi_namespace_node *parent_node; |
134 | struct acpi_namespace_node *start_node; | |
135 | struct acpi_namespace_node *parameter_node = NULL; | |
136 | union acpi_operand_object *ddb_handle; | |
f3d2e786 | 137 | struct acpi_table_header *table; |
1da177e4 | 138 | |
b229cf92 | 139 | ACPI_FUNCTION_TRACE(ex_load_table_op); |
1da177e4 | 140 | |
a6823e12 | 141 | /* Find the ACPI table in the RSDT/XSDT */ |
1da177e4 | 142 | |
4be44fcd LB |
143 | status = acpi_tb_find_table(operand[0]->string.pointer, |
144 | operand[1]->string.pointer, | |
f3d2e786 | 145 | operand[2]->string.pointer, &table_index); |
4be44fcd | 146 | if (ACPI_FAILURE(status)) { |
1da177e4 | 147 | if (status != AE_NOT_FOUND) { |
4be44fcd | 148 | return_ACPI_STATUS(status); |
1da177e4 LT |
149 | } |
150 | ||
151 | /* Table not found, return an Integer=0 and AE_OK */ | |
152 | ||
4be44fcd | 153 | ddb_handle = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); |
1da177e4 | 154 | if (!ddb_handle) { |
4be44fcd | 155 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
156 | } |
157 | ||
158 | ddb_handle->integer.value = 0; | |
159 | *return_desc = ddb_handle; | |
160 | ||
4be44fcd | 161 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
162 | } |
163 | ||
164 | /* Default nodes */ | |
165 | ||
166 | start_node = walk_state->scope_info->scope.node; | |
167 | parent_node = acpi_gbl_root_node; | |
168 | ||
169 | /* root_path (optional parameter) */ | |
170 | ||
171 | if (operand[3]->string.length > 0) { | |
172 | /* | |
173 | * Find the node referenced by the root_path_string. This is the | |
174 | * location within the namespace where the table will be loaded. | |
175 | */ | |
4be44fcd | 176 | status = |
4119532c BM |
177 | acpi_ns_get_node(start_node, operand[3]->string.pointer, |
178 | ACPI_NS_SEARCH_PARENT, &parent_node); | |
4be44fcd LB |
179 | if (ACPI_FAILURE(status)) { |
180 | return_ACPI_STATUS(status); | |
1da177e4 LT |
181 | } |
182 | } | |
183 | ||
184 | /* parameter_path (optional parameter) */ | |
185 | ||
186 | if (operand[4]->string.length > 0) { | |
187 | if ((operand[4]->string.pointer[0] != '\\') && | |
4be44fcd | 188 | (operand[4]->string.pointer[0] != '^')) { |
1da177e4 LT |
189 | /* |
190 | * Path is not absolute, so it will be relative to the node | |
191 | * referenced by the root_path_string (or the NS root if omitted) | |
192 | */ | |
193 | start_node = parent_node; | |
194 | } | |
195 | ||
44f6c012 RM |
196 | /* Find the node referenced by the parameter_path_string */ |
197 | ||
4be44fcd | 198 | status = |
4119532c BM |
199 | acpi_ns_get_node(start_node, operand[4]->string.pointer, |
200 | ACPI_NS_SEARCH_PARENT, ¶meter_node); | |
4be44fcd LB |
201 | if (ACPI_FAILURE(status)) { |
202 | return_ACPI_STATUS(status); | |
1da177e4 LT |
203 | } |
204 | } | |
205 | ||
206 | /* Load the table into the namespace */ | |
207 | ||
f3d2e786 | 208 | status = acpi_ex_add_table(table_index, parent_node, &ddb_handle); |
4be44fcd LB |
209 | if (ACPI_FAILURE(status)) { |
210 | return_ACPI_STATUS(status); | |
1da177e4 LT |
211 | } |
212 | ||
213 | /* Parameter Data (optional) */ | |
214 | ||
215 | if (parameter_node) { | |
52fc0b02 | 216 | |
1da177e4 LT |
217 | /* Store the parameter data into the optional parameter object */ |
218 | ||
4be44fcd LB |
219 | status = acpi_ex_store(operand[5], |
220 | ACPI_CAST_PTR(union acpi_operand_object, | |
221 | parameter_node), | |
222 | walk_state); | |
223 | if (ACPI_FAILURE(status)) { | |
224 | (void)acpi_ex_unload_table(ddb_handle); | |
225 | return_ACPI_STATUS(status); | |
1da177e4 LT |
226 | } |
227 | } | |
228 | ||
f3d2e786 BM |
229 | status = acpi_get_table_by_index(table_index, &table); |
230 | if (ACPI_SUCCESS(status)) { | |
231 | ACPI_INFO((AE_INFO, | |
232 | "Dynamic OEM Table Load - [%4.4s] OemId [%6.6s] OemTableId [%8.8s]", | |
233 | table->signature, table->oem_id, | |
234 | table->oem_table_id)); | |
235 | } | |
967440e3 | 236 | |
1da177e4 | 237 | *return_desc = ddb_handle; |
4be44fcd | 238 | return_ACPI_STATUS(status); |
1da177e4 LT |
239 | } |
240 | ||
1da177e4 LT |
241 | /******************************************************************************* |
242 | * | |
243 | * FUNCTION: acpi_ex_load_op | |
244 | * | |
a6823e12 | 245 | * PARAMETERS: obj_desc - Region or Buffer/Field where the table will be |
1da177e4 LT |
246 | * obtained |
247 | * Target - Where a handle to the table will be stored | |
248 | * walk_state - Current state | |
249 | * | |
250 | * RETURN: Status | |
251 | * | |
252 | * DESCRIPTION: Load an ACPI table from a field or operation region | |
253 | * | |
a6823e12 AS |
254 | * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer |
255 | * objects before this code is reached. | |
256 | * | |
257 | * If source is an operation region, it must refer to system_memory, as | |
258 | * per the ACPI specification. | |
259 | * | |
1da177e4 LT |
260 | ******************************************************************************/ |
261 | ||
262 | acpi_status | |
4be44fcd LB |
263 | acpi_ex_load_op(union acpi_operand_object *obj_desc, |
264 | union acpi_operand_object *target, | |
265 | struct acpi_walk_state *walk_state) | |
1da177e4 | 266 | { |
4be44fcd | 267 | union acpi_operand_object *ddb_handle; |
428f2112 | 268 | struct acpi_table_desc table_desc; |
a6823e12 AS |
269 | acpi_native_uint table_index; |
270 | acpi_status status; | |
1da177e4 | 271 | |
b229cf92 | 272 | ACPI_FUNCTION_TRACE(ex_load_op); |
1da177e4 | 273 | |
428f2112 | 274 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); |
a6823e12 AS |
275 | |
276 | /* Source Object can be either an op_region or a Buffer/Field */ | |
277 | ||
4be44fcd | 278 | switch (ACPI_GET_OBJECT_TYPE(obj_desc)) { |
1da177e4 LT |
279 | case ACPI_TYPE_REGION: |
280 | ||
a6823e12 AS |
281 | /* Region must be system_memory (from ACPI spec) */ |
282 | ||
283 | if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) { | |
284 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
285 | } | |
286 | ||
4be44fcd LB |
287 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Load from Region %p %s\n", |
288 | obj_desc, | |
289 | acpi_ut_get_object_type_name(obj_desc))); | |
1da177e4 LT |
290 | |
291 | /* | |
292 | * If the Region Address and Length have not been previously evaluated, | |
293 | * evaluate them now and save the results. | |
294 | */ | |
295 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
4be44fcd LB |
296 | status = acpi_ds_get_region_arguments(obj_desc); |
297 | if (ACPI_FAILURE(status)) { | |
298 | return_ACPI_STATUS(status); | |
1da177e4 LT |
299 | } |
300 | } | |
301 | ||
a6823e12 AS |
302 | table_desc.address = obj_desc->region.address; |
303 | table_desc.length = obj_desc->region.length; | |
304 | table_desc.flags = ACPI_TABLE_ORIGIN_MAPPED; | |
1da177e4 LT |
305 | break; |
306 | ||
a6823e12 | 307 | case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */ |
1da177e4 | 308 | |
a6823e12 | 309 | /* Simply extract the buffer from the buffer object */ |
1da177e4 | 310 | |
a6823e12 AS |
311 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
312 | "Load from Buffer or Field %p %s\n", obj_desc, | |
313 | acpi_ut_get_object_type_name(obj_desc))); | |
88ac00f5 | 314 | |
a6823e12 AS |
315 | table_desc.pointer = ACPI_CAST_PTR(struct acpi_table_header, |
316 | obj_desc->buffer.pointer); | |
317 | table_desc.length = table_desc.pointer->length; | |
318 | table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED; | |
1da177e4 | 319 | |
a6823e12 | 320 | obj_desc->buffer.pointer = NULL; |
1da177e4 LT |
321 | break; |
322 | ||
1da177e4 | 323 | default: |
4be44fcd | 324 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
325 | } |
326 | ||
f3d2e786 BM |
327 | /* |
328 | * Install the new table into the local data structures | |
329 | */ | |
428f2112 | 330 | status = acpi_tb_add_table(&table_desc, &table_index); |
f3d2e786 | 331 | if (ACPI_FAILURE(status)) { |
0fab8997 | 332 | goto cleanup; |
f3d2e786 | 333 | } |
1da177e4 | 334 | |
f3d2e786 BM |
335 | status = |
336 | acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle); | |
4be44fcd | 337 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 338 | |
88ac00f5 RM |
339 | /* On error, table_ptr was deallocated above */ |
340 | ||
4be44fcd | 341 | return_ACPI_STATUS(status); |
1da177e4 LT |
342 | } |
343 | ||
344 | /* Store the ddb_handle into the Target operand */ | |
345 | ||
4be44fcd LB |
346 | status = acpi_ex_store(ddb_handle, target, walk_state); |
347 | if (ACPI_FAILURE(status)) { | |
348 | (void)acpi_ex_unload_table(ddb_handle); | |
1da177e4 | 349 | |
88ac00f5 | 350 | /* table_ptr was deallocated above */ |
1da177e4 | 351 | |
4be44fcd | 352 | return_ACPI_STATUS(status); |
88ac00f5 | 353 | } |
1da177e4 | 354 | |
4be44fcd LB |
355 | cleanup: |
356 | if (ACPI_FAILURE(status)) { | |
a6823e12 | 357 | acpi_tb_delete_table(&table_desc); |
1da177e4 | 358 | } |
4be44fcd | 359 | return_ACPI_STATUS(status); |
1da177e4 LT |
360 | } |
361 | ||
1da177e4 LT |
362 | /******************************************************************************* |
363 | * | |
364 | * FUNCTION: acpi_ex_unload_table | |
365 | * | |
366 | * PARAMETERS: ddb_handle - Handle to a previously loaded table | |
367 | * | |
368 | * RETURN: Status | |
369 | * | |
370 | * DESCRIPTION: Unload an ACPI table | |
371 | * | |
372 | ******************************************************************************/ | |
373 | ||
4be44fcd | 374 | acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle) |
1da177e4 | 375 | { |
4be44fcd LB |
376 | acpi_status status = AE_OK; |
377 | union acpi_operand_object *table_desc = ddb_handle; | |
f3d2e786 | 378 | acpi_native_uint table_index; |
1da177e4 | 379 | |
b229cf92 | 380 | ACPI_FUNCTION_TRACE(ex_unload_table); |
1da177e4 LT |
381 | |
382 | /* | |
383 | * Validate the handle | |
384 | * Although the handle is partially validated in acpi_ex_reconfiguration(), | |
385 | * when it calls acpi_ex_resolve_operands(), the handle is more completely | |
386 | * validated here. | |
387 | */ | |
388 | if ((!ddb_handle) || | |
4be44fcd LB |
389 | (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) || |
390 | (ACPI_GET_OBJECT_TYPE(ddb_handle) != ACPI_TYPE_LOCAL_REFERENCE)) { | |
391 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
392 | } |
393 | ||
f3d2e786 | 394 | /* Get the table index from the ddb_handle */ |
1da177e4 | 395 | |
f3d2e786 | 396 | table_index = (acpi_native_uint) table_desc->reference.object; |
1da177e4 LT |
397 | |
398 | /* | |
399 | * Delete the entire namespace under this table Node | |
400 | * (Offset contains the table_id) | |
401 | */ | |
f3d2e786 BM |
402 | acpi_tb_delete_namespace_by_owner(table_index); |
403 | acpi_tb_release_owner_id(table_index); | |
1da177e4 | 404 | |
f3d2e786 | 405 | acpi_tb_set_table_loaded_flag(table_index, FALSE); |
1da177e4 LT |
406 | |
407 | /* Delete the table descriptor (ddb_handle) */ | |
408 | ||
4be44fcd LB |
409 | acpi_ut_remove_reference(table_desc); |
410 | return_ACPI_STATUS(status); | |
1da177e4 | 411 | } |