blob: 18832205b631b4514941490f86adb308914dc10e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
4 *
5 *****************************************************************************/
6
7/*
Bob Moorea8357b02010-01-22 19:07:36 +08008 * Copyright (C) 2000 - 2010, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acinterp.h"
47#include "acnamesp.h"
48#include "actables.h"
49#include "acdispat.h"
Bob Moore3c59f9602009-05-21 10:51:53 +080050#include "acevents.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#define _COMPONENT ACPI_EXECUTER
Len Brown4be44fc2005-08-05 00:44:28 -040053ACPI_MODULE_NAME("exconfig")
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Robert Moore44f6c012005-04-18 22:49:35 -040055/* Local prototypes */
Robert Moore44f6c012005-04-18 22:49:35 -040056static acpi_status
Bob Moore67a119f2008-06-10 13:42:13 +080057acpi_ex_add_table(u32 table_index,
Len Brown4be44fc2005-08-05 00:44:28 -040058 struct acpi_namespace_node *parent_node,
59 union acpi_operand_object **ddb_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Bob Moore3c59f9602009-05-21 10:51:53 +080061static acpi_status
62acpi_ex_region_read(union acpi_operand_object *obj_desc,
63 u32 length, u8 *buffer);
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065/*******************************************************************************
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
Robert Moore44f6c012005-04-18 22:49:35 -040080static acpi_status
Bob Moore67a119f2008-06-10 13:42:13 +080081acpi_ex_add_table(u32 table_index,
Len Brown4be44fc2005-08-05 00:44:28 -040082 struct acpi_namespace_node *parent_node,
83 union acpi_operand_object **ddb_handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
Len Brown4be44fc2005-08-05 00:44:28 -040085 union acpi_operand_object *obj_desc;
Bob Moore186c3072010-04-27 11:32:28 +080086 acpi_status status;
87 acpi_owner_id owner_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
Bob Mooreb229cf92006-04-21 17:15:00 -040089 ACPI_FUNCTION_TRACE(ex_add_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91 /* Create an object to be the table handle */
92
Len Brown4be44fc2005-08-05 00:44:28 -040093 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 if (!obj_desc) {
Len Brown4be44fc2005-08-05 00:44:28 -040095 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 }
97
Robert Moore0c9938c2005-07-29 15:15:00 -070098 /* Init the table handle */
99
Lin Minge0be6f52009-05-21 10:32:02 +0800100 obj_desc->common.flags |= AOPOBJ_DATA_VALID;
Bob Moore1044f1f2008-09-27 11:08:41 +0800101 obj_desc->reference.class = ACPI_REFCLASS_TABLE;
Robert Moore0c9938c2005-07-29 15:15:00 -0700102 *ddb_handle = obj_desc;
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 /* Install the new table into the local data structures */
105
Bob Moore57e664c2008-09-27 10:40:39 +0800106 obj_desc->reference.value = table_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108 /* Add the table to the namespace */
109
Bob Mooref3d2e782007-02-02 19:48:18 +0300110 status = acpi_ns_load_table(table_index, parent_node);
Len Brown4be44fc2005-08-05 00:44:28 -0400111 if (ACPI_FAILURE(status)) {
Bob Mooref3d2e782007-02-02 19:48:18 +0300112 acpi_ut_remove_reference(obj_desc);
113 *ddb_handle = NULL;
Lin Ming7f0c8262009-08-13 14:03:15 +0800114 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 }
116
Lin Ming7f0c8262009-08-13 14:03:15 +0800117 /* 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
Rafael J. Wysocki98746472010-07-08 00:43:36 +0200123 /* Update GPEs for any new _Lxx/_Exx methods. Ignore errors */
Bob Moore186c3072010-04-27 11:32:28 +0800124
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131}
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133/*******************************************************************************
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 *
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300142 * DESCRIPTION: Load an ACPI table from the RSDT/XSDT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 *
144 ******************************************************************************/
145
146acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400147acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
148 union acpi_operand_object **return_desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
Len Brown4be44fc2005-08-05 00:44:28 -0400150 acpi_status status;
151 union acpi_operand_object **operand = &walk_state->operands[0];
Len Brown4be44fc2005-08-05 00:44:28 -0400152 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;
Bob Mooref3d2e782007-02-02 19:48:18 +0300156 struct acpi_table_header *table;
Bob Moore67a119f2008-06-10 13:42:13 +0800157 u32 table_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Bob Mooreb229cf92006-04-21 17:15:00 -0400159 ACPI_FUNCTION_TRACE(ex_load_table_op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Lin Ming49718b12008-04-10 19:06:40 +0400161 /* 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
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300169 /* Find the ACPI table in the RSDT/XSDT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Len Brown4be44fc2005-08-05 00:44:28 -0400171 status = acpi_tb_find_table(operand[0]->string.pointer,
172 operand[1]->string.pointer,
Bob Mooref3d2e782007-02-02 19:48:18 +0300173 operand[2]->string.pointer, &table_index);
Len Brown4be44fc2005-08-05 00:44:28 -0400174 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 if (status != AE_NOT_FOUND) {
Len Brown4be44fc2005-08-05 00:44:28 -0400176 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 }
178
179 /* Table not found, return an Integer=0 and AE_OK */
180
Bob Mooredc95a272009-11-12 09:52:45 +0800181 ddb_handle = acpi_ut_create_integer_object((u64) 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 if (!ddb_handle) {
Len Brown4be44fc2005-08-05 00:44:28 -0400183 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 }
185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 *return_desc = ddb_handle;
Len Brown4be44fc2005-08-05 00:44:28 -0400187 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 }
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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400202 status =
Bob Moore41195322006-05-26 16:36:00 -0400203 acpi_ns_get_node(start_node, operand[3]->string.pointer,
204 ACPI_NS_SEARCH_PARENT, &parent_node);
Len Brown4be44fc2005-08-05 00:44:28 -0400205 if (ACPI_FAILURE(status)) {
206 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 }
208 }
209
210 /* parameter_path (optional parameter) */
211
212 if (operand[4]->string.length > 0) {
213 if ((operand[4]->string.pointer[0] != '\\') &&
Len Brown4be44fc2005-08-05 00:44:28 -0400214 (operand[4]->string.pointer[0] != '^')) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 /*
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
Robert Moore44f6c012005-04-18 22:49:35 -0400222 /* Find the node referenced by the parameter_path_string */
223
Len Brown4be44fc2005-08-05 00:44:28 -0400224 status =
Bob Moore41195322006-05-26 16:36:00 -0400225 acpi_ns_get_node(start_node, operand[4]->string.pointer,
226 ACPI_NS_SEARCH_PARENT, &parameter_node);
Len Brown4be44fc2005-08-05 00:44:28 -0400227 if (ACPI_FAILURE(status)) {
228 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 }
230 }
231
232 /* Load the table into the namespace */
233
Bob Mooref3d2e782007-02-02 19:48:18 +0300234 status = acpi_ex_add_table(table_index, parent_node, &ddb_handle);
Len Brown4be44fc2005-08-05 00:44:28 -0400235 if (ACPI_FAILURE(status)) {
236 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 }
238
239 /* Parameter Data (optional) */
240
241 if (parameter_node) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 /* Store the parameter data into the optional parameter object */
244
Len Brown4be44fc2005-08-05 00:44:28 -0400245 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);
Lin Ming06366c12009-05-21 10:29:28 +0800251
252 acpi_ut_remove_reference(ddb_handle);
Len Brown4be44fc2005-08-05 00:44:28 -0400253 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 }
255 }
256
Bob Mooref3d2e782007-02-02 19:48:18 +0300257 status = acpi_get_table_by_index(table_index, &table);
258 if (ACPI_SUCCESS(status)) {
Bob Moore186c3072010-04-27 11:32:28 +0800259 ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
260 acpi_tb_print_table_header(0, table);
Bob Mooref3d2e782007-02-02 19:48:18 +0300261 }
Bob Moore967440e32006-06-23 17:04:00 -0400262
Lin Ming3e08e2d2008-04-10 19:06:38 +0400263 /* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 *return_desc = ddb_handle;
Len Brown4be44fc2005-08-05 00:44:28 -0400271 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272}
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274/*******************************************************************************
275 *
Bob Moore3c59f9602009-05-21 10:51:53 +0800276 * FUNCTION: acpi_ex_region_read
277 *
278 * PARAMETERS: obj_desc - Region descriptor
279 * Length - Number of bytes to read
280 * Buffer - Pointer to where to put the data
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
289static acpi_status
290acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer)
291{
292 acpi_status status;
Bob Moore5df7e6c2010-01-21 10:06:32 +0800293 u64 value;
Bob Mooref5407af2009-05-21 10:56:52 +0800294 u32 region_offset = 0;
Bob Moore3c59f9602009-05-21 10:51:53 +0800295 u32 i;
296
Bob Moore3c59f9602009-05-21 10:51:53 +0800297 /* Bytewise reads */
298
299 for (i = 0; i < length; i++) {
300 status = acpi_ev_address_space_dispatch(obj_desc, ACPI_READ,
Bob Mooref5407af2009-05-21 10:56:52 +0800301 region_offset, 8,
302 &value);
Bob Moore3c59f9602009-05-21 10:51:53 +0800303 if (ACPI_FAILURE(status)) {
304 return status;
305 }
306
307 *buffer = (u8)value;
308 buffer++;
Bob Mooref5407af2009-05-21 10:56:52 +0800309 region_offset++;
Bob Moore3c59f9602009-05-21 10:51:53 +0800310 }
311
312 return AE_OK;
313}
314
315/*******************************************************************************
316 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 * FUNCTION: acpi_ex_load_op
318 *
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300319 * PARAMETERS: obj_desc - Region or Buffer/Field where the table will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 * obtained
321 * Target - Where a handle to the table will be stored
322 * walk_state - Current state
323 *
324 * RETURN: Status
325 *
326 * DESCRIPTION: Load an ACPI table from a field or operation region
327 *
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300328 * 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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 ******************************************************************************/
335
336acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400337acpi_ex_load_op(union acpi_operand_object *obj_desc,
338 union acpi_operand_object *target,
339 struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340{
Len Brown4be44fc2005-08-05 00:44:28 -0400341 union acpi_operand_object *ddb_handle;
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800342 struct acpi_table_header *table;
Alexey Starikovskiy428f2112007-02-02 19:48:22 +0300343 struct acpi_table_desc table_desc;
Bob Moore67a119f2008-06-10 13:42:13 +0800344 u32 table_index;
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300345 acpi_status status;
Bob Moore98af37f2008-04-10 19:06:39 +0400346 u32 length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Bob Mooreb229cf92006-04-21 17:15:00 -0400348 ACPI_FUNCTION_TRACE(ex_load_op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Alexey Starikovskiy428f2112007-02-02 19:48:22 +0300350 ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300351
352 /* Source Object can be either an op_region or a Buffer/Field */
353
Bob Moore3371c192009-02-18 14:44:03 +0800354 switch (obj_desc->common.type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 case ACPI_TYPE_REGION:
356
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800357 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
358 "Load table from Region %p\n", obj_desc));
Bob Moore5eb69182008-04-10 19:06:39 +0400359
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300360 /* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 /*
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)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400371 status = acpi_ds_get_region_arguments(obj_desc);
372 if (ACPI_FAILURE(status)) {
373 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 }
375 }
376
Bob Moore3c59f9602009-05-21 10:51:53 +0800377 /* Get the table header first so we can get the table length */
378
379 table = ACPI_ALLOCATE(sizeof(struct acpi_table_header));
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800380 if (!table) {
381 return_ACPI_STATUS(AE_NO_MEMORY);
382 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Bob Moore3c59f9602009-05-21 10:51:53 +0800384 status =
385 acpi_ex_region_read(obj_desc,
386 sizeof(struct acpi_table_header),
387 ACPI_CAST_PTR(u8, table));
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800388 length = table->length;
Bob Moore3c59f9602009-05-21 10:51:53 +0800389 ACPI_FREE(table);
390
391 if (ACPI_FAILURE(status)) {
392 return_ACPI_STATUS(status);
393 }
Bob Moore98af37f2008-04-10 19:06:39 +0400394
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
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800401 /*
Bob Moore3c59f9602009-05-21 10:51:53 +0800402 * 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.
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800415 */
Bob Moore98af37f2008-04-10 19:06:39 +0400416
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800417 /* 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
Bob Moore3c59f9602009-05-21 10:51:53 +0800424 /* Read the entire table */
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800425
Bob Moore3c59f9602009-05-21 10:51:53 +0800426 status = acpi_ex_region_read(obj_desc, length,
427 ACPI_CAST_PTR(u8,
428 table_desc.pointer));
429 if (ACPI_FAILURE(status)) {
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800430 ACPI_FREE(table_desc.pointer);
Bob Moore3c59f9602009-05-21 10:51:53 +0800431 return_ACPI_STATUS(status);
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800432 }
433
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800434 table_desc.address = obj_desc->region.address;
435 break;
436
437 case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */
438
439 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
440 "Load table from Buffer or Field %p\n",
441 obj_desc));
442
443 /* Must have at least an ACPI table header */
444
445 if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) {
446 return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
447 }
448
449 /* Get the actual table length from the table header */
450
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);
Bob Moore98af37f2008-04-10 19:06:39 +0400463 }
464
Bob Moore5eb69182008-04-10 19:06:39 +0400465 /*
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800466 * Copy the table from the buffer because the buffer could be modified
467 * or even deleted in the future
Bob Moore5eb69182008-04-10 19:06:39 +0400468 */
Bob Moore98af37f2008-04-10 19:06:39 +0400469 table_desc.pointer = ACPI_ALLOCATE(length);
Bob Moore5eb69182008-04-10 19:06:39 +0400470 if (!table_desc.pointer) {
471 return_ACPI_STATUS(AE_NO_MEMORY);
472 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800474 ACPI_MEMCPY(table_desc.pointer, table, length);
475 table_desc.address = ACPI_TO_INTEGER(table_desc.pointer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 break;
477
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400479 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 }
481
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800482 /* 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
Alexey Starikovskiy428f2112007-02-02 19:48:22 +0300497 status = acpi_tb_add_table(&table_desc, &table_index);
Bob Mooref3d2e782007-02-02 19:48:18 +0300498 if (ACPI_FAILURE(status)) {
Bob Moore2147d3f2010-01-21 09:08:31 +0800499
500 /* Delete allocated table buffer */
501
502 acpi_tb_delete_table(&table_desc);
503 return_ACPI_STATUS(status);
Bob Mooref3d2e782007-02-02 19:48:18 +0300504 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Bob Moore0bda3f22008-06-10 14:14:17 +0800506 /*
507 * Add the table to the namespace.
508 *
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800509 * Note: Load the table objects relative to the root of the namespace.
Bob Moore0bda3f22008-06-10 14:14:17 +0800510 * This appears to go against the ACPI specification, but we do it for
511 * compatibility with other ACPI implementations.
512 */
Bob Mooref3d2e782007-02-02 19:48:18 +0300513 status =
Bob Moore0bda3f22008-06-10 14:14:17 +0800514 acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle);
Len Brown4be44fc2005-08-05 00:44:28 -0400515 if (ACPI_FAILURE(status)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400516
Robert Moore88ac00f2005-05-26 00:00:00 -0400517 /* On error, table_ptr was deallocated above */
518
Len Brown4be44fc2005-08-05 00:44:28 -0400519 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 }
521
522 /* Store the ddb_handle into the Target operand */
523
Len Brown4be44fc2005-08-05 00:44:28 -0400524 status = acpi_ex_store(ddb_handle, target, walk_state);
525 if (ACPI_FAILURE(status)) {
526 (void)acpi_ex_unload_table(ddb_handle);
Robert Moore88ac00f2005-05-26 00:00:00 -0400527
528 /* table_ptr was deallocated above */
529
Bob Moorea13b8462008-04-10 19:06:39 +0400530 acpi_ut_remove_reference(ddb_handle);
Len Brown4be44fc2005-08-05 00:44:28 -0400531 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 }
533
Bob Moore186c3072010-04-27 11:32:28 +0800534 ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
535 acpi_tb_print_table_header(0, table_desc.pointer);
536
Lin Ming06366c12009-05-21 10:29:28 +0800537 /* Remove the reference by added by acpi_ex_store above */
538
539 acpi_ut_remove_reference(ddb_handle);
540
Lin Ming3e08e2d2008-04-10 19:06:38 +0400541 /* 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
Len Brown4be44fc2005-08-05 00:44:28 -0400549 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550}
551
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552/*******************************************************************************
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
Len Brown4be44fc2005-08-05 00:44:28 -0400564acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565{
Len Brown4be44fc2005-08-05 00:44:28 -0400566 acpi_status status = AE_OK;
567 union acpi_operand_object *table_desc = ddb_handle;
Bob Moore67a119f2008-06-10 13:42:13 +0800568 u32 table_index;
Lin Ming3e08e2d2008-04-10 19:06:38 +0400569 struct acpi_table_header *table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Bob Mooreb229cf92006-04-21 17:15:00 -0400571 ACPI_FUNCTION_TRACE(ex_unload_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
573 /*
574 * Validate the handle
Lin Minge0be6f52009-05-21 10:32:02 +0800575 * Although the handle is partially validated in acpi_ex_reconfiguration()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 * when it calls acpi_ex_resolve_operands(), the handle is more completely
577 * validated here.
Lin Minge0be6f52009-05-21 10:32:02 +0800578 *
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)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 */
583 if ((!ddb_handle) ||
Len Brown4be44fc2005-08-05 00:44:28 -0400584 (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) ||
Lin Minge0be6f52009-05-21 10:32:02 +0800585 (ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) ||
586 (!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) {
Len Brown4be44fc2005-08-05 00:44:28 -0400587 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
589
Bob Moore57e664c2008-09-27 10:40:39 +0800590 /* Get the table index from the ddb_handle */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Bob Moore57e664c2008-09-27 10:40:39 +0800592 table_index = table_desc->reference.value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
Lin Minge0be6f52009-05-21 10:32:02 +0800594 /* 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
Lin Ming3e08e2d2008-04-10 19:06:38 +0400600 /* 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
Bob Moore8a335a232009-03-09 16:31:04 +0800611 /* Delete the portion of the namespace owned by this table */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
Bob Moore8a335a232009-03-09 16:31:04 +0800613 status = acpi_tb_delete_namespace_by_owner(table_index);
614 if (ACPI_FAILURE(status)) {
615 return_ACPI_STATUS(status);
616 }
617
618 (void)acpi_tb_release_owner_id(table_index);
Bob Mooref3d2e782007-02-02 19:48:18 +0300619 acpi_tb_set_table_loaded_flag(table_index, FALSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620
Lin Minge0be6f52009-05-21 10:32:02 +0800621 /*
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;
Lin Ming3e08e2d2008-04-10 19:06:38 +0400626 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627}