blob: 8ba4bb36af9f1b6282ef2c00e2c30c4724a25e76 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: dswexec - Dispatcher method execution callbacks;
4 * dispatch to interpreter.
5 *
6 *****************************************************************************/
7
8/*
Bob Moore6c9deb72007-02-02 19:48:24 +03009 * Copyright (C) 2000 - 2007, R. Byron Moore
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <acpi/acpi.h>
46#include <acpi/acparser.h>
47#include <acpi/amlcode.h>
48#include <acpi/acdispat.h>
49#include <acpi/acinterp.h>
50#include <acpi/acnamesp.h>
51#include <acpi/acdebug.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define _COMPONENT ACPI_DISPATCHER
Len Brown4be44fc2005-08-05 00:44:28 -040054ACPI_MODULE_NAME("dswexec")
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56/*
57 * Dispatch table for opcode classes
58 */
Len Brown4be44fc2005-08-05 00:44:28 -040059static ACPI_EXECUTE_OP acpi_gbl_op_type_dispatch[] = {
60 acpi_ex_opcode_0A_0T_1R,
61 acpi_ex_opcode_1A_0T_0R,
62 acpi_ex_opcode_1A_0T_1R,
63 acpi_ex_opcode_1A_1T_0R,
64 acpi_ex_opcode_1A_1T_1R,
65 acpi_ex_opcode_2A_0T_0R,
66 acpi_ex_opcode_2A_0T_1R,
67 acpi_ex_opcode_2A_1T_1R,
68 acpi_ex_opcode_2A_2T_1R,
69 acpi_ex_opcode_3A_0T_0R,
70 acpi_ex_opcode_3A_1T_1R,
71 acpi_ex_opcode_6A_0T_1R
72};
Robert Moore44f6c012005-04-18 22:49:35 -040073
Linus Torvalds1da177e2005-04-16 15:20:36 -070074/*****************************************************************************
75 *
76 * FUNCTION: acpi_ds_get_predicate_value
77 *
78 * PARAMETERS: walk_state - Current state of the parse tree walk
Robert Moore44f6c012005-04-18 22:49:35 -040079 * result_obj - if non-zero, pop result from result stack
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 *
81 * RETURN: Status
82 *
83 * DESCRIPTION: Get the result of a predicate evaluation
84 *
85 ****************************************************************************/
86
87acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040088acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state,
89 union acpi_operand_object *result_obj)
90{
91 acpi_status status = AE_OK;
92 union acpi_operand_object *obj_desc;
93 union acpi_operand_object *local_obj_desc = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Bob Mooreb229cf92006-04-21 17:15:00 -040095 ACPI_FUNCTION_TRACE_PTR(ds_get_predicate_value, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97 walk_state->control_state->common.state = 0;
98
99 if (result_obj) {
Len Brown4be44fc2005-08-05 00:44:28 -0400100 status = acpi_ds_result_pop(&obj_desc, walk_state);
101 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500102 ACPI_EXCEPTION((AE_INFO, status,
103 "Could not get result from predicate evaluation"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Len Brown4be44fc2005-08-05 00:44:28 -0400105 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 }
Len Brown4be44fc2005-08-05 00:44:28 -0400107 } else {
108 status = acpi_ds_create_operand(walk_state, walk_state->op, 0);
109 if (ACPI_FAILURE(status)) {
110 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 }
112
Len Brown4be44fc2005-08-05 00:44:28 -0400113 status =
114 acpi_ex_resolve_to_value(&walk_state->operands[0],
115 walk_state);
116 if (ACPI_FAILURE(status)) {
117 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 }
119
Len Brown4be44fc2005-08-05 00:44:28 -0400120 obj_desc = walk_state->operands[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 }
122
123 if (!obj_desc) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500124 ACPI_ERROR((AE_INFO,
Bob Mooreb229cf92006-04-21 17:15:00 -0400125 "No predicate ObjDesc=%p State=%p",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500126 obj_desc, walk_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Len Brown4be44fc2005-08-05 00:44:28 -0400128 return_ACPI_STATUS(AE_AML_NO_OPERAND);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 }
130
131 /*
132 * Result of predicate evaluation must be an Integer
133 * object. Implicitly convert the argument if necessary.
134 */
Len Brown4be44fc2005-08-05 00:44:28 -0400135 status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, 16);
136 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 goto cleanup;
138 }
139
Len Brown4be44fc2005-08-05 00:44:28 -0400140 if (ACPI_GET_OBJECT_TYPE(local_obj_desc) != ACPI_TYPE_INTEGER) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500141 ACPI_ERROR((AE_INFO,
Bob Mooreb229cf92006-04-21 17:15:00 -0400142 "Bad predicate (not an integer) ObjDesc=%p State=%p Type=%X",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500143 obj_desc, walk_state,
144 ACPI_GET_OBJECT_TYPE(obj_desc)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 status = AE_AML_OPERAND_TYPE;
147 goto cleanup;
148 }
149
150 /* Truncate the predicate to 32-bits if necessary */
151
Len Brown4be44fc2005-08-05 00:44:28 -0400152 acpi_ex_truncate_for32bit_table(local_obj_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154 /*
155 * Save the result of the predicate evaluation on
156 * the control stack
157 */
158 if (local_obj_desc->integer.value) {
159 walk_state->control_state->common.value = TRUE;
Len Brown4be44fc2005-08-05 00:44:28 -0400160 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 /*
162 * Predicate is FALSE, we will just toss the
163 * rest of the package
164 */
165 walk_state->control_state->common.value = FALSE;
166 status = AE_CTRL_FALSE;
167 }
168
Len Brown4be44fc2005-08-05 00:44:28 -0400169 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Len Brown4be44fc2005-08-05 00:44:28 -0400171 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
172 walk_state->control_state->common.value,
173 walk_state->op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Len Brown4be44fc2005-08-05 00:44:28 -0400175 /* Break to debugger to display result */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Len Brown4be44fc2005-08-05 00:44:28 -0400177 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
178 (local_obj_desc, walk_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 /*
181 * Delete the predicate result object (we know that
182 * we don't need it anymore)
183 */
184 if (local_obj_desc != obj_desc) {
Len Brown4be44fc2005-08-05 00:44:28 -0400185 acpi_ut_remove_reference(local_obj_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
Len Brown4be44fc2005-08-05 00:44:28 -0400187 acpi_ut_remove_reference(obj_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
189 walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
Len Brown4be44fc2005-08-05 00:44:28 -0400190 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191}
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193/*****************************************************************************
194 *
195 * FUNCTION: acpi_ds_exec_begin_op
196 *
197 * PARAMETERS: walk_state - Current state of the parse tree walk
Robert Moore44f6c012005-04-18 22:49:35 -0400198 * out_op - Where to return op if a new one is created
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 *
200 * RETURN: Status
201 *
202 * DESCRIPTION: Descending callback used during the execution of control
203 * methods. This is where most operators and operands are
204 * dispatched to the interpreter.
205 *
206 ****************************************************************************/
207
208acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400209acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
210 union acpi_parse_object **out_op)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
Len Brown4be44fc2005-08-05 00:44:28 -0400212 union acpi_parse_object *op;
213 acpi_status status = AE_OK;
214 u32 opcode_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Bob Mooreb229cf92006-04-21 17:15:00 -0400216 ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
218 op = walk_state->op;
219 if (!op) {
Len Brown4be44fc2005-08-05 00:44:28 -0400220 status = acpi_ds_load2_begin_op(walk_state, out_op);
221 if (ACPI_FAILURE(status)) {
Bob Moore867c9ae2007-02-02 19:48:21 +0300222 goto error_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 }
224
225 op = *out_op;
226 walk_state->op = op;
227 walk_state->opcode = op->common.aml_opcode;
Len Brown4be44fc2005-08-05 00:44:28 -0400228 walk_state->op_info =
229 acpi_ps_get_opcode_info(op->common.aml_opcode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Len Brown4be44fc2005-08-05 00:44:28 -0400231 if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
232 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
233 "(%s) Popping scope for Op %p\n",
234 acpi_ut_get_type_name(walk_state->
235 op_info->
236 object_type),
237 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Len Brown4be44fc2005-08-05 00:44:28 -0400239 status = acpi_ds_scope_stack_pop(walk_state);
240 if (ACPI_FAILURE(status)) {
Bob Moore867c9ae2007-02-02 19:48:21 +0300241 goto error_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 }
243 }
244 }
245
246 if (op == walk_state->origin) {
247 if (out_op) {
248 *out_op = op;
249 }
250
Len Brown4be44fc2005-08-05 00:44:28 -0400251 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 }
253
254 /*
255 * If the previous opcode was a conditional, this opcode
256 * must be the beginning of the associated predicate.
257 * Save this knowledge in the current scope descriptor
258 */
259 if ((walk_state->control_state) &&
Len Brown4be44fc2005-08-05 00:44:28 -0400260 (walk_state->control_state->common.state ==
261 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
262 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
263 "Exec predicate Op=%p State=%p\n", op,
264 walk_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
Len Brown4be44fc2005-08-05 00:44:28 -0400266 walk_state->control_state->common.state =
267 ACPI_CONTROL_PREDICATE_EXECUTING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 /* Save start of predicate */
270
271 walk_state->control_state->control.predicate_op = op;
272 }
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 opcode_class = walk_state->op_info->class;
275
276 /* We want to send namepaths to the load code */
277
278 if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
279 opcode_class = AML_CLASS_NAMED_OBJECT;
280 }
281
282 /*
283 * Handle the opcode based upon the opcode type
284 */
285 switch (opcode_class) {
286 case AML_CLASS_CONTROL:
287
Len Brown4be44fc2005-08-05 00:44:28 -0400288 status = acpi_ds_exec_begin_control_op(walk_state, op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 break;
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 case AML_CLASS_NAMED_OBJECT:
292
Bob Moore41195322006-05-26 16:36:00 -0400293 if (walk_state->walk_type & ACPI_WALK_METHOD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 /*
Robert Moore44f6c012005-04-18 22:49:35 -0400295 * Found a named object declaration during method execution;
296 * we must enter this object into the namespace. The created
297 * object is temporary and will be deleted upon completion of
298 * the execution of this method.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 */
Len Brown4be44fc2005-08-05 00:44:28 -0400300 status = acpi_ds_load2_begin_op(walk_state, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 }
302
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 break;
304
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 case AML_CLASS_EXECUTE:
306 case AML_CLASS_CREATE:
Bob Moore773069d2008-04-10 19:06:36 +0400307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 break;
309
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 default:
311 break;
312 }
313
314 /* Nothing to do here during method execution */
315
Len Brown4be44fc2005-08-05 00:44:28 -0400316 return_ACPI_STATUS(status);
Bob Moore867c9ae2007-02-02 19:48:21 +0300317
318 error_exit:
319 status = acpi_ds_method_error(status, walk_state);
320 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321}
322
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323/*****************************************************************************
324 *
325 * FUNCTION: acpi_ds_exec_end_op
326 *
327 * PARAMETERS: walk_state - Current state of the parse tree walk
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 *
329 * RETURN: Status
330 *
331 * DESCRIPTION: Ascending callback used during the execution of control
332 * methods. The only thing we really need to do here is to
333 * notice the beginning of IF, ELSE, and WHILE blocks.
334 *
335 ****************************************************************************/
336
Len Brown4be44fc2005-08-05 00:44:28 -0400337acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338{
Len Brown4be44fc2005-08-05 00:44:28 -0400339 union acpi_parse_object *op;
340 acpi_status status = AE_OK;
341 u32 op_type;
342 u32 op_class;
343 union acpi_parse_object *next_op;
344 union acpi_parse_object *first_arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Bob Mooreb229cf92006-04-21 17:15:00 -0400346 ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Len Brown4be44fc2005-08-05 00:44:28 -0400348 op = walk_state->op;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 op_type = walk_state->op_info->type;
350 op_class = walk_state->op_info->class;
351
352 if (op_class == AML_CLASS_UNKNOWN) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500353 ACPI_ERROR((AE_INFO, "Unknown opcode %X",
354 op->common.aml_opcode));
Len Brown4be44fc2005-08-05 00:44:28 -0400355 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 }
357
358 first_arg = op->common.value.arg;
359
360 /* Init the walk state */
361
362 walk_state->num_operands = 0;
Bob Moore773069d2008-04-10 19:06:36 +0400363 walk_state->operand_index = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 walk_state->return_desc = NULL;
365 walk_state->result_obj = NULL;
366
367 /* Call debugger for single step support (DEBUG build only) */
368
Len Brown4be44fc2005-08-05 00:44:28 -0400369 ACPI_DEBUGGER_EXEC(status =
370 acpi_db_single_step(walk_state, op, op_class));
371 ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
372 return_ACPI_STATUS(status);}
373 ) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375 /* Decode the Opcode Class */
376
377 switch (op_class) {
Bob Moore4e3156b2008-04-10 19:06:37 +0400378 case AML_CLASS_ARGUMENT: /* Constants, literals, etc. */
379
380 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
381 status = acpi_ds_evaluate_name_path(walk_state);
382 if (ACPI_FAILURE(status)) {
383 goto cleanup;
384 }
385 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 break;
387
Bob Moore4e3156b2008-04-10 19:06:37 +0400388 case AML_CLASS_EXECUTE: /* Most operators with arguments */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390 /* Build resolved operand stack */
391
Len Brown4be44fc2005-08-05 00:44:28 -0400392 status = acpi_ds_create_operands(walk_state, first_arg);
393 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 goto cleanup;
395 }
396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 /*
398 * All opcodes require operand resolution, with the only exceptions
399 * being the object_type and size_of operators.
400 */
401 if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400402
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 /* Resolve all operands */
404
Len Brown4be44fc2005-08-05 00:44:28 -0400405 status = acpi_ex_resolve_operands(walk_state->opcode,
406 &(walk_state->
407 operands
408 [walk_state->
409 num_operands - 1]),
410 walk_state);
411 if (ACPI_SUCCESS(status)) {
412 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
413 ACPI_IMODE_EXECUTE,
414 acpi_ps_get_opcode_name
415 (walk_state->opcode),
416 walk_state->num_operands,
Bob Mooreb229cf92006-04-21 17:15:00 -0400417 "after ExResolveOperands");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 }
419 }
420
Len Brown4be44fc2005-08-05 00:44:28 -0400421 if (ACPI_SUCCESS(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 /*
423 * Dispatch the request to the appropriate interpreter handler
424 * routine. There is one routine per opcode "type" based upon the
425 * number of opcode arguments and return type.
426 */
Len Brown4be44fc2005-08-05 00:44:28 -0400427 status =
428 acpi_gbl_op_type_dispatch[op_type] (walk_state);
429 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 /*
Bob Mooreb229cf92006-04-21 17:15:00 -0400431 * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 * Local is uninitialized.
433 */
Len Brown4be44fc2005-08-05 00:44:28 -0400434 if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
435 (walk_state->opcode == AML_STORE_OP) &&
436 (walk_state->operands[0]->common.type ==
437 ACPI_TYPE_LOCAL_REFERENCE)
438 && (walk_state->operands[1]->common.type ==
439 ACPI_TYPE_LOCAL_REFERENCE)
440 && (walk_state->operands[0]->reference.opcode ==
441 walk_state->operands[1]->reference.opcode)
442 && (walk_state->operands[0]->reference.offset ==
443 walk_state->operands[1]->reference.offset)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 status = AE_OK;
Len Brown4be44fc2005-08-05 00:44:28 -0400445 } else {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500446 ACPI_EXCEPTION((AE_INFO, status,
447 "While resolving operands for [%s]",
448 acpi_ps_get_opcode_name
449 (walk_state->opcode)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 }
451 }
452
453 /* Always delete the argument objects and clear the operand stack */
454
Len Brown4be44fc2005-08-05 00:44:28 -0400455 acpi_ds_clear_operands(walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457 /*
458 * If a result object was returned from above, push it on the
459 * current result stack
460 */
Len Brown4be44fc2005-08-05 00:44:28 -0400461 if (ACPI_SUCCESS(status) && walk_state->result_obj) {
462 status =
463 acpi_ds_result_push(walk_state->result_obj,
464 walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 break;
467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 default:
469
470 switch (op_type) {
Len Brown4be44fc2005-08-05 00:44:28 -0400471 case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
473 /* 1 Operand, 0 external_result, 0 internal_result */
474
Len Brown4be44fc2005-08-05 00:44:28 -0400475 status = acpi_ds_exec_end_control_op(walk_state, op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 break;
478
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 case AML_TYPE_METHOD_CALL:
480
481 /*
482 * If the method is referenced from within a package
483 * declaration, it is not a invocation of the method, just
484 * a reference to it.
485 */
486 if ((op->asl.parent) &&
Len Brown4be44fc2005-08-05 00:44:28 -0400487 ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
488 || (op->asl.parent->asl.aml_opcode ==
489 AML_VAR_PACKAGE_OP))) {
490 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
491 "Method Reference in a Package, Op=%p\n",
492 op));
Bob Moore967440e32006-06-23 17:04:00 -0400493
Len Brown4be44fc2005-08-05 00:44:28 -0400494 op->common.node =
495 (struct acpi_namespace_node *)op->asl.value.
Bob Mooreb1609872008-04-10 19:06:40 +0400496 arg->asl.node;
Len Brown4be44fc2005-08-05 00:44:28 -0400497 acpi_ut_add_reference(op->asl.value.arg->asl.
498 node->object);
499 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 }
501
Len Brown4be44fc2005-08-05 00:44:28 -0400502 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
503 "Method invocation, Op=%p\n", op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
505 /*
506 * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
507 * the method Node pointer
508 */
509 /* next_op points to the op that holds the method name */
510
511 next_op = first_arg;
512
513 /* next_op points to first argument op */
514
515 next_op = next_op->common.next;
516
517 /*
518 * Get the method's arguments and put them on the operand stack
519 */
Len Brown4be44fc2005-08-05 00:44:28 -0400520 status = acpi_ds_create_operands(walk_state, next_op);
521 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 break;
523 }
524
525 /*
526 * Since the operands will be passed to another control method,
527 * we must resolve all local references here (Local variables,
528 * arguments to *this* method, etc.)
529 */
Len Brown4be44fc2005-08-05 00:44:28 -0400530 status = acpi_ds_resolve_operands(walk_state);
531 if (ACPI_FAILURE(status)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 /* On error, clear all resolved operands */
534
Len Brown4be44fc2005-08-05 00:44:28 -0400535 acpi_ds_clear_operands(walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 break;
537 }
538
539 /*
540 * Tell the walk loop to preempt this running method and
541 * execute the new method
542 */
543 status = AE_CTRL_TRANSFER;
544
545 /*
546 * Return now; we don't want to disturb anything,
547 * especially the operand count!
548 */
Len Brown4be44fc2005-08-05 00:44:28 -0400549 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
551 case AML_TYPE_CREATE_FIELD:
552
Len Brown4be44fc2005-08-05 00:44:28 -0400553 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Bob Mooreb229cf92006-04-21 17:15:00 -0400554 "Executing CreateField Buffer/Index Op=%p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400555 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
Len Brown4be44fc2005-08-05 00:44:28 -0400557 status = acpi_ds_load2_end_op(walk_state);
558 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 break;
560 }
561
Len Brown4be44fc2005-08-05 00:44:28 -0400562 status =
563 acpi_ds_eval_buffer_field_operands(walk_state, op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 break;
565
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 case AML_TYPE_CREATE_OBJECT:
567
Len Brown4be44fc2005-08-05 00:44:28 -0400568 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Bob Mooreb229cf92006-04-21 17:15:00 -0400569 "Executing CreateObject (Buffer/Package) Op=%p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400570 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
572 switch (op->common.parent->common.aml_opcode) {
573 case AML_NAME_OP:
574
575 /*
Robert Moore44f6c012005-04-18 22:49:35 -0400576 * Put the Node on the object stack (Contains the ACPI Name
577 * of this object)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 */
Len Brown4be44fc2005-08-05 00:44:28 -0400579 walk_state->operands[0] =
580 (void *)op->common.parent->common.node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 walk_state->num_operands = 1;
582
Len Brown4be44fc2005-08-05 00:44:28 -0400583 status = acpi_ds_create_node(walk_state,
584 op->common.parent->
585 common.node,
586 op->common.parent);
587 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 break;
589 }
590
591 /* Fall through */
592 /*lint -fallthrough */
593
594 case AML_INT_EVAL_SUBTREE_OP:
595
Len Brown4be44fc2005-08-05 00:44:28 -0400596 status =
597 acpi_ds_eval_data_object_operands
598 (walk_state, op,
599 acpi_ns_get_attached_object(op->common.
600 parent->common.
601 node));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 break;
603
604 default:
605
Len Brown4be44fc2005-08-05 00:44:28 -0400606 status =
607 acpi_ds_eval_data_object_operands
608 (walk_state, op, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 break;
610 }
611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 /*
613 * If a result object was returned from above, push it on the
614 * current result stack
615 */
Robert Moore44f6c012005-04-18 22:49:35 -0400616 if (walk_state->result_obj) {
Len Brown4be44fc2005-08-05 00:44:28 -0400617 status =
618 acpi_ds_result_push(walk_state->result_obj,
619 walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 }
621 break;
622
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 case AML_TYPE_NAMED_FIELD:
624 case AML_TYPE_NAMED_COMPLEX:
625 case AML_TYPE_NAMED_SIMPLE:
626 case AML_TYPE_NAMED_NO_OBJ:
627
Len Brown4be44fc2005-08-05 00:44:28 -0400628 status = acpi_ds_load2_end_op(walk_state);
629 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 break;
631 }
632
633 if (op->common.aml_opcode == AML_REGION_OP) {
Len Brown4be44fc2005-08-05 00:44:28 -0400634 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Bob Mooreb229cf92006-04-21 17:15:00 -0400635 "Executing OpRegion Address/Length Op=%p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400636 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Len Brown4be44fc2005-08-05 00:44:28 -0400638 status =
639 acpi_ds_eval_region_operands(walk_state,
640 op);
641 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 break;
643 }
Lin Ming941f48b2008-04-10 19:06:41 +0400644 } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
645 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
646 "Executing DataTableRegion Strings Op=%p\n",
647 op));
648
649 status =
650 acpi_ds_eval_table_region_operands
651 (walk_state, op);
652 if (ACPI_FAILURE(status)) {
653 break;
654 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 break;
657
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 case AML_TYPE_UNDEFINED:
659
Bob Mooreb8e4d892006-01-27 16:43:00 -0500660 ACPI_ERROR((AE_INFO,
661 "Undefined opcode type Op=%p", op));
Len Brown4be44fc2005-08-05 00:44:28 -0400662 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
664 case AML_TYPE_BOGUS:
665
Len Brown4be44fc2005-08-05 00:44:28 -0400666 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
667 "Internal opcode=%X type Op=%p\n",
668 walk_state->opcode, op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 break;
670
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 default:
672
Bob Mooreb8e4d892006-01-27 16:43:00 -0500673 ACPI_ERROR((AE_INFO,
674 "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p",
675 op_class, op_type, op->common.aml_opcode,
676 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
678 status = AE_NOT_IMPLEMENTED;
679 break;
680 }
681 }
682
683 /*
684 * ACPI 2.0 support for 64-bit integers: Truncate numeric
685 * result value if we are executing from a 32-bit ACPI table
686 */
Len Brown4be44fc2005-08-05 00:44:28 -0400687 acpi_ex_truncate_for32bit_table(walk_state->result_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
689 /*
690 * Check if we just completed the evaluation of a
691 * conditional predicate
692 */
Len Brown4be44fc2005-08-05 00:44:28 -0400693 if ((ACPI_SUCCESS(status)) &&
694 (walk_state->control_state) &&
695 (walk_state->control_state->common.state ==
696 ACPI_CONTROL_PREDICATE_EXECUTING) &&
697 (walk_state->control_state->control.predicate_op == op)) {
698 status =
699 acpi_ds_get_predicate_value(walk_state,
700 walk_state->result_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 walk_state->result_obj = NULL;
702 }
703
Len Brown4be44fc2005-08-05 00:44:28 -0400704 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 if (walk_state->result_obj) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 /* Break to debugger to display result */
709
Len Brown4be44fc2005-08-05 00:44:28 -0400710 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
711 (walk_state->result_obj, walk_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713 /*
714 * Delete the result op if and only if:
715 * Parent will not use the result -- such as any
716 * non-nested type2 op in a method (parent will be method)
717 */
Len Brown4be44fc2005-08-05 00:44:28 -0400718 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
719 walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721#ifdef _UNDER_DEVELOPMENT
722
723 if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
Len Brown4be44fc2005-08-05 00:44:28 -0400724 acpi_db_method_end(walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 }
726#endif
727
Bob Mooredefba1d2005-12-16 17:05:00 -0500728 /* Invoke exception handler on error */
729
730 if (ACPI_FAILURE(status)) {
731 status = acpi_ds_method_error(status, walk_state);
732 }
733
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 /* Always clear the object stack */
735
736 walk_state->num_operands = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400737 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738}