blob: d555b374e314a881b463083c890563a658257f4d [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 Moorea8357b02010-01-22 19:07:36 +08009 * Copyright (C) 2000 - 2010, Intel Corp.
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>
Len Browne2f7a772009-01-09 00:30:03 -050046#include "accommon.h"
47#include "acparser.h"
48#include "amlcode.h"
49#include "acdispat.h"
50#include "acinterp.h"
51#include "acnamesp.h"
52#include "acdebug.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#define _COMPONENT ACPI_DISPATCHER
Len Brown4be44fc2005-08-05 00:44:28 -040055ACPI_MODULE_NAME("dswexec")
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57/*
58 * Dispatch table for opcode classes
59 */
Len Brown4be44fc2005-08-05 00:44:28 -040060static ACPI_EXECUTE_OP acpi_gbl_op_type_dispatch[] = {
61 acpi_ex_opcode_0A_0T_1R,
62 acpi_ex_opcode_1A_0T_0R,
63 acpi_ex_opcode_1A_0T_1R,
64 acpi_ex_opcode_1A_1T_0R,
65 acpi_ex_opcode_1A_1T_1R,
66 acpi_ex_opcode_2A_0T_0R,
67 acpi_ex_opcode_2A_0T_1R,
68 acpi_ex_opcode_2A_1T_1R,
69 acpi_ex_opcode_2A_2T_1R,
70 acpi_ex_opcode_3A_0T_0R,
71 acpi_ex_opcode_3A_1T_1R,
72 acpi_ex_opcode_6A_0T_1R
73};
Robert Moore44f6c012005-04-18 22:49:35 -040074
Linus Torvalds1da177e2005-04-16 15:20:36 -070075/*****************************************************************************
76 *
77 * FUNCTION: acpi_ds_get_predicate_value
78 *
79 * PARAMETERS: walk_state - Current state of the parse tree walk
Robert Moore44f6c012005-04-18 22:49:35 -040080 * result_obj - if non-zero, pop result from result stack
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 *
82 * RETURN: Status
83 *
84 * DESCRIPTION: Get the result of a predicate evaluation
85 *
86 ****************************************************************************/
87
88acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040089acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state,
90 union acpi_operand_object *result_obj)
91{
92 acpi_status status = AE_OK;
93 union acpi_operand_object *obj_desc;
94 union acpi_operand_object *local_obj_desc = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Bob Mooreb229cf92006-04-21 17:15:00 -040096 ACPI_FUNCTION_TRACE_PTR(ds_get_predicate_value, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98 walk_state->control_state->common.state = 0;
99
100 if (result_obj) {
Len Brown4be44fc2005-08-05 00:44:28 -0400101 status = acpi_ds_result_pop(&obj_desc, walk_state);
102 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500103 ACPI_EXCEPTION((AE_INFO, status,
104 "Could not get result from predicate evaluation"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Len Brown4be44fc2005-08-05 00:44:28 -0400106 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 }
Len Brown4be44fc2005-08-05 00:44:28 -0400108 } else {
109 status = acpi_ds_create_operand(walk_state, walk_state->op, 0);
110 if (ACPI_FAILURE(status)) {
111 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 }
113
Len Brown4be44fc2005-08-05 00:44:28 -0400114 status =
115 acpi_ex_resolve_to_value(&walk_state->operands[0],
116 walk_state);
117 if (ACPI_FAILURE(status)) {
118 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 }
120
Len Brown4be44fc2005-08-05 00:44:28 -0400121 obj_desc = walk_state->operands[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 }
123
124 if (!obj_desc) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500125 ACPI_ERROR((AE_INFO,
Bob Mooreb229cf92006-04-21 17:15:00 -0400126 "No predicate ObjDesc=%p State=%p",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500127 obj_desc, walk_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Len Brown4be44fc2005-08-05 00:44:28 -0400129 return_ACPI_STATUS(AE_AML_NO_OPERAND);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 }
131
132 /*
133 * Result of predicate evaluation must be an Integer
134 * object. Implicitly convert the argument if necessary.
135 */
Len Brown4be44fc2005-08-05 00:44:28 -0400136 status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, 16);
137 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 goto cleanup;
139 }
140
Bob Moore3371c192009-02-18 14:44:03 +0800141 if (local_obj_desc->common.type != ACPI_TYPE_INTEGER) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500142 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800143 "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
Bob Moore3371c192009-02-18 14:44:03 +0800144 obj_desc, walk_state, obj_desc->common.type));
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
Lin Mingb9d13122008-09-27 12:01:12 +0800169 /* Predicate can be used for an implicit return value */
170
171 (void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE);
172
Len Brown4be44fc2005-08-05 00:44:28 -0400173 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Len Brown4be44fc2005-08-05 00:44:28 -0400175 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
176 walk_state->control_state->common.value,
177 walk_state->op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
Len Brown4be44fc2005-08-05 00:44:28 -0400179 /* Break to debugger to display result */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Len Brown4be44fc2005-08-05 00:44:28 -0400181 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
182 (local_obj_desc, walk_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
184 /*
185 * Delete the predicate result object (we know that
186 * we don't need it anymore)
187 */
188 if (local_obj_desc != obj_desc) {
Len Brown4be44fc2005-08-05 00:44:28 -0400189 acpi_ut_remove_reference(local_obj_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 }
Len Brown4be44fc2005-08-05 00:44:28 -0400191 acpi_ut_remove_reference(obj_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193 walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
Len Brown4be44fc2005-08-05 00:44:28 -0400194 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197/*****************************************************************************
198 *
199 * FUNCTION: acpi_ds_exec_begin_op
200 *
201 * PARAMETERS: walk_state - Current state of the parse tree walk
Robert Moore44f6c012005-04-18 22:49:35 -0400202 * out_op - Where to return op if a new one is created
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 *
204 * RETURN: Status
205 *
206 * DESCRIPTION: Descending callback used during the execution of control
207 * methods. This is where most operators and operands are
208 * dispatched to the interpreter.
209 *
210 ****************************************************************************/
211
212acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400213acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
214 union acpi_parse_object **out_op)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
Len Brown4be44fc2005-08-05 00:44:28 -0400216 union acpi_parse_object *op;
217 acpi_status status = AE_OK;
218 u32 opcode_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Bob Mooreb229cf92006-04-21 17:15:00 -0400220 ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
222 op = walk_state->op;
223 if (!op) {
Len Brown4be44fc2005-08-05 00:44:28 -0400224 status = acpi_ds_load2_begin_op(walk_state, out_op);
225 if (ACPI_FAILURE(status)) {
Bob Moore867c9ae2007-02-02 19:48:21 +0300226 goto error_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 }
228
229 op = *out_op;
230 walk_state->op = op;
231 walk_state->opcode = op->common.aml_opcode;
Len Brown4be44fc2005-08-05 00:44:28 -0400232 walk_state->op_info =
233 acpi_ps_get_opcode_info(op->common.aml_opcode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Len Brown4be44fc2005-08-05 00:44:28 -0400235 if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
236 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
237 "(%s) Popping scope for Op %p\n",
238 acpi_ut_get_type_name(walk_state->
239 op_info->
240 object_type),
241 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Len Brown4be44fc2005-08-05 00:44:28 -0400243 status = acpi_ds_scope_stack_pop(walk_state);
244 if (ACPI_FAILURE(status)) {
Bob Moore867c9ae2007-02-02 19:48:21 +0300245 goto error_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 }
247 }
248 }
249
250 if (op == walk_state->origin) {
251 if (out_op) {
252 *out_op = op;
253 }
254
Len Brown4be44fc2005-08-05 00:44:28 -0400255 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 }
257
258 /*
259 * If the previous opcode was a conditional, this opcode
260 * must be the beginning of the associated predicate.
261 * Save this knowledge in the current scope descriptor
262 */
263 if ((walk_state->control_state) &&
Len Brown4be44fc2005-08-05 00:44:28 -0400264 (walk_state->control_state->common.state ==
265 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
266 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
267 "Exec predicate Op=%p State=%p\n", op,
268 walk_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
Len Brown4be44fc2005-08-05 00:44:28 -0400270 walk_state->control_state->common.state =
271 ACPI_CONTROL_PREDICATE_EXECUTING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273 /* Save start of predicate */
274
275 walk_state->control_state->control.predicate_op = op;
276 }
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 opcode_class = walk_state->op_info->class;
279
280 /* We want to send namepaths to the load code */
281
282 if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
283 opcode_class = AML_CLASS_NAMED_OBJECT;
284 }
285
286 /*
287 * Handle the opcode based upon the opcode type
288 */
289 switch (opcode_class) {
290 case AML_CLASS_CONTROL:
291
Len Brown4be44fc2005-08-05 00:44:28 -0400292 status = acpi_ds_exec_begin_control_op(walk_state, op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 break;
294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 case AML_CLASS_NAMED_OBJECT:
296
Bob Moore41195322006-05-26 16:36:00 -0400297 if (walk_state->walk_type & ACPI_WALK_METHOD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 /*
Robert Moore44f6c012005-04-18 22:49:35 -0400299 * Found a named object declaration during method execution;
300 * we must enter this object into the namespace. The created
301 * object is temporary and will be deleted upon completion of
302 * the execution of this method.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 */
Len Brown4be44fc2005-08-05 00:44:28 -0400304 status = acpi_ds_load2_begin_op(walk_state, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 }
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 break;
308
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 case AML_CLASS_EXECUTE:
310 case AML_CLASS_CREATE:
Bob Moore773069d2008-04-10 19:06:36 +0400311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 break;
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 default:
315 break;
316 }
317
318 /* Nothing to do here during method execution */
319
Len Brown4be44fc2005-08-05 00:44:28 -0400320 return_ACPI_STATUS(status);
Bob Moore867c9ae2007-02-02 19:48:21 +0300321
322 error_exit:
323 status = acpi_ds_method_error(status, walk_state);
324 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325}
326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327/*****************************************************************************
328 *
329 * FUNCTION: acpi_ds_exec_end_op
330 *
331 * PARAMETERS: walk_state - Current state of the parse tree walk
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 *
333 * RETURN: Status
334 *
335 * DESCRIPTION: Ascending callback used during the execution of control
336 * methods. The only thing we really need to do here is to
337 * notice the beginning of IF, ELSE, and WHILE blocks.
338 *
339 ****************************************************************************/
340
Len Brown4be44fc2005-08-05 00:44:28 -0400341acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342{
Len Brown4be44fc2005-08-05 00:44:28 -0400343 union acpi_parse_object *op;
344 acpi_status status = AE_OK;
345 u32 op_type;
346 u32 op_class;
347 union acpi_parse_object *next_op;
348 union acpi_parse_object *first_arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Bob Mooreb229cf92006-04-21 17:15:00 -0400350 ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Len Brown4be44fc2005-08-05 00:44:28 -0400352 op = walk_state->op;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 op_type = walk_state->op_info->type;
354 op_class = walk_state->op_info->class;
355
356 if (op_class == AML_CLASS_UNKNOWN) {
Bob Mooref6a22b02010-03-05 17:56:40 +0800357 ACPI_ERROR((AE_INFO, "Unknown opcode 0x%X",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500358 op->common.aml_opcode));
Len Brown4be44fc2005-08-05 00:44:28 -0400359 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 }
361
362 first_arg = op->common.value.arg;
363
364 /* Init the walk state */
365
366 walk_state->num_operands = 0;
Bob Moore773069d2008-04-10 19:06:36 +0400367 walk_state->operand_index = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 walk_state->return_desc = NULL;
369 walk_state->result_obj = NULL;
370
371 /* Call debugger for single step support (DEBUG build only) */
372
Len Brown4be44fc2005-08-05 00:44:28 -0400373 ACPI_DEBUGGER_EXEC(status =
374 acpi_db_single_step(walk_state, op, op_class));
375 ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
376 return_ACPI_STATUS(status);}
377 ) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
379 /* Decode the Opcode Class */
380
381 switch (op_class) {
Bob Moore4e3156b2008-04-10 19:06:37 +0400382 case AML_CLASS_ARGUMENT: /* Constants, literals, etc. */
383
384 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
385 status = acpi_ds_evaluate_name_path(walk_state);
386 if (ACPI_FAILURE(status)) {
387 goto cleanup;
388 }
389 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 break;
391
Bob Moore4e3156b2008-04-10 19:06:37 +0400392 case AML_CLASS_EXECUTE: /* Most operators with arguments */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
394 /* Build resolved operand stack */
395
Len Brown4be44fc2005-08-05 00:44:28 -0400396 status = acpi_ds_create_operands(walk_state, first_arg);
397 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 goto cleanup;
399 }
400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 /*
402 * All opcodes require operand resolution, with the only exceptions
403 * being the object_type and size_of operators.
404 */
405 if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 /* Resolve all operands */
408
Len Brown4be44fc2005-08-05 00:44:28 -0400409 status = acpi_ex_resolve_operands(walk_state->opcode,
410 &(walk_state->
411 operands
412 [walk_state->
413 num_operands - 1]),
414 walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 }
416
Len Brown4be44fc2005-08-05 00:44:28 -0400417 if (ACPI_SUCCESS(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 /*
419 * Dispatch the request to the appropriate interpreter handler
420 * routine. There is one routine per opcode "type" based upon the
421 * number of opcode arguments and return type.
422 */
Len Brown4be44fc2005-08-05 00:44:28 -0400423 status =
424 acpi_gbl_op_type_dispatch[op_type] (walk_state);
425 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 /*
Bob Mooreb229cf92006-04-21 17:15:00 -0400427 * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 * Local is uninitialized.
429 */
Len Brown4be44fc2005-08-05 00:44:28 -0400430 if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
431 (walk_state->opcode == AML_STORE_OP) &&
432 (walk_state->operands[0]->common.type ==
433 ACPI_TYPE_LOCAL_REFERENCE)
434 && (walk_state->operands[1]->common.type ==
435 ACPI_TYPE_LOCAL_REFERENCE)
Bob Moore1044f1f2008-09-27 11:08:41 +0800436 && (walk_state->operands[0]->reference.class ==
437 walk_state->operands[1]->reference.class)
438 && (walk_state->operands[0]->reference.value ==
439 walk_state->operands[1]->reference.value)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 status = AE_OK;
Len Brown4be44fc2005-08-05 00:44:28 -0400441 } else {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500442 ACPI_EXCEPTION((AE_INFO, status,
443 "While resolving operands for [%s]",
444 acpi_ps_get_opcode_name
445 (walk_state->opcode)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 }
447 }
448
449 /* Always delete the argument objects and clear the operand stack */
450
Len Brown4be44fc2005-08-05 00:44:28 -0400451 acpi_ds_clear_operands(walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
453 /*
454 * If a result object was returned from above, push it on the
455 * current result stack
456 */
Len Brown4be44fc2005-08-05 00:44:28 -0400457 if (ACPI_SUCCESS(status) && walk_state->result_obj) {
458 status =
459 acpi_ds_result_push(walk_state->result_obj,
460 walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 break;
463
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 default:
465
466 switch (op_type) {
Len Brown4be44fc2005-08-05 00:44:28 -0400467 case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
469 /* 1 Operand, 0 external_result, 0 internal_result */
470
Len Brown4be44fc2005-08-05 00:44:28 -0400471 status = acpi_ds_exec_end_control_op(walk_state, op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 break;
474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 case AML_TYPE_METHOD_CALL:
476
477 /*
478 * If the method is referenced from within a package
479 * declaration, it is not a invocation of the method, just
480 * a reference to it.
481 */
482 if ((op->asl.parent) &&
Len Brown4be44fc2005-08-05 00:44:28 -0400483 ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
484 || (op->asl.parent->asl.aml_opcode ==
485 AML_VAR_PACKAGE_OP))) {
486 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
487 "Method Reference in a Package, Op=%p\n",
488 op));
Bob Moore967440e32006-06-23 17:04:00 -0400489
Len Brown4be44fc2005-08-05 00:44:28 -0400490 op->common.node =
491 (struct acpi_namespace_node *)op->asl.value.
Bob Mooreb1609872008-04-10 19:06:40 +0400492 arg->asl.node;
Len Brown4be44fc2005-08-05 00:44:28 -0400493 acpi_ut_add_reference(op->asl.value.arg->asl.
494 node->object);
495 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 }
497
Len Brown4be44fc2005-08-05 00:44:28 -0400498 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
499 "Method invocation, Op=%p\n", op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
501 /*
502 * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
503 * the method Node pointer
504 */
505 /* next_op points to the op that holds the method name */
506
507 next_op = first_arg;
508
509 /* next_op points to first argument op */
510
511 next_op = next_op->common.next;
512
513 /*
514 * Get the method's arguments and put them on the operand stack
515 */
Len Brown4be44fc2005-08-05 00:44:28 -0400516 status = acpi_ds_create_operands(walk_state, next_op);
517 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 break;
519 }
520
521 /*
522 * Since the operands will be passed to another control method,
523 * we must resolve all local references here (Local variables,
524 * arguments to *this* method, etc.)
525 */
Len Brown4be44fc2005-08-05 00:44:28 -0400526 status = acpi_ds_resolve_operands(walk_state);
527 if (ACPI_FAILURE(status)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 /* On error, clear all resolved operands */
530
Len Brown4be44fc2005-08-05 00:44:28 -0400531 acpi_ds_clear_operands(walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 break;
533 }
534
535 /*
536 * Tell the walk loop to preempt this running method and
537 * execute the new method
538 */
539 status = AE_CTRL_TRANSFER;
540
541 /*
542 * Return now; we don't want to disturb anything,
543 * especially the operand count!
544 */
Len Brown4be44fc2005-08-05 00:44:28 -0400545 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547 case AML_TYPE_CREATE_FIELD:
548
Len Brown4be44fc2005-08-05 00:44:28 -0400549 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Bob Mooreb229cf92006-04-21 17:15:00 -0400550 "Executing CreateField Buffer/Index Op=%p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400551 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Len Brown4be44fc2005-08-05 00:44:28 -0400553 status = acpi_ds_load2_end_op(walk_state);
554 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 break;
556 }
557
Len Brown4be44fc2005-08-05 00:44:28 -0400558 status =
559 acpi_ds_eval_buffer_field_operands(walk_state, op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 break;
561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 case AML_TYPE_CREATE_OBJECT:
563
Len Brown4be44fc2005-08-05 00:44:28 -0400564 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Bob Mooreb229cf92006-04-21 17:15:00 -0400565 "Executing CreateObject (Buffer/Package) Op=%p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400566 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
568 switch (op->common.parent->common.aml_opcode) {
569 case AML_NAME_OP:
570
571 /*
Robert Moore44f6c012005-04-18 22:49:35 -0400572 * Put the Node on the object stack (Contains the ACPI Name
573 * of this object)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 */
Len Brown4be44fc2005-08-05 00:44:28 -0400575 walk_state->operands[0] =
576 (void *)op->common.parent->common.node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 walk_state->num_operands = 1;
578
Len Brown4be44fc2005-08-05 00:44:28 -0400579 status = acpi_ds_create_node(walk_state,
580 op->common.parent->
581 common.node,
582 op->common.parent);
583 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 break;
585 }
586
587 /* Fall through */
588 /*lint -fallthrough */
589
590 case AML_INT_EVAL_SUBTREE_OP:
591
Len Brown4be44fc2005-08-05 00:44:28 -0400592 status =
593 acpi_ds_eval_data_object_operands
594 (walk_state, op,
595 acpi_ns_get_attached_object(op->common.
596 parent->common.
597 node));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 break;
599
600 default:
601
Len Brown4be44fc2005-08-05 00:44:28 -0400602 status =
603 acpi_ds_eval_data_object_operands
604 (walk_state, op, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 break;
606 }
607
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 /*
609 * If a result object was returned from above, push it on the
610 * current result stack
611 */
Robert Moore44f6c012005-04-18 22:49:35 -0400612 if (walk_state->result_obj) {
Len Brown4be44fc2005-08-05 00:44:28 -0400613 status =
614 acpi_ds_result_push(walk_state->result_obj,
615 walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 }
617 break;
618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 case AML_TYPE_NAMED_FIELD:
620 case AML_TYPE_NAMED_COMPLEX:
621 case AML_TYPE_NAMED_SIMPLE:
622 case AML_TYPE_NAMED_NO_OBJ:
623
Len Brown4be44fc2005-08-05 00:44:28 -0400624 status = acpi_ds_load2_end_op(walk_state);
625 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 break;
627 }
628
629 if (op->common.aml_opcode == AML_REGION_OP) {
Len Brown4be44fc2005-08-05 00:44:28 -0400630 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Bob Mooreb229cf92006-04-21 17:15:00 -0400631 "Executing OpRegion Address/Length Op=%p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400632 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
Len Brown4be44fc2005-08-05 00:44:28 -0400634 status =
635 acpi_ds_eval_region_operands(walk_state,
636 op);
637 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 break;
639 }
Lin Ming941f48b2008-04-10 19:06:41 +0400640 } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
641 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
642 "Executing DataTableRegion Strings Op=%p\n",
643 op));
644
645 status =
646 acpi_ds_eval_table_region_operands
647 (walk_state, op);
648 if (ACPI_FAILURE(status)) {
649 break;
650 }
Lin Mingef805d92008-04-10 19:06:41 +0400651 } else if (op->common.aml_opcode == AML_BANK_FIELD_OP) {
652 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
653 "Executing BankField Op=%p\n",
654 op));
655
656 status =
657 acpi_ds_eval_bank_field_operands(walk_state,
658 op);
659 if (ACPI_FAILURE(status)) {
660 break;
661 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 break;
664
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 case AML_TYPE_UNDEFINED:
666
Bob Mooreb8e4d892006-01-27 16:43:00 -0500667 ACPI_ERROR((AE_INFO,
668 "Undefined opcode type Op=%p", op));
Len Brown4be44fc2005-08-05 00:44:28 -0400669 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
671 case AML_TYPE_BOGUS:
672
Len Brown4be44fc2005-08-05 00:44:28 -0400673 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
674 "Internal opcode=%X type Op=%p\n",
675 walk_state->opcode, op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 break;
677
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 default:
679
Bob Mooreb8e4d892006-01-27 16:43:00 -0500680 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800681 "Unimplemented opcode, class=0x%X type=0x%X Opcode=-0x%X Op=%p",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500682 op_class, op_type, op->common.aml_opcode,
683 op));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
685 status = AE_NOT_IMPLEMENTED;
686 break;
687 }
688 }
689
690 /*
691 * ACPI 2.0 support for 64-bit integers: Truncate numeric
692 * result value if we are executing from a 32-bit ACPI table
693 */
Len Brown4be44fc2005-08-05 00:44:28 -0400694 acpi_ex_truncate_for32bit_table(walk_state->result_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695
696 /*
697 * Check if we just completed the evaluation of a
698 * conditional predicate
699 */
Len Brown4be44fc2005-08-05 00:44:28 -0400700 if ((ACPI_SUCCESS(status)) &&
701 (walk_state->control_state) &&
702 (walk_state->control_state->common.state ==
703 ACPI_CONTROL_PREDICATE_EXECUTING) &&
704 (walk_state->control_state->control.predicate_op == op)) {
705 status =
706 acpi_ds_get_predicate_value(walk_state,
707 walk_state->result_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 walk_state->result_obj = NULL;
709 }
710
Len Brown4be44fc2005-08-05 00:44:28 -0400711 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 if (walk_state->result_obj) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400714
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 /* Break to debugger to display result */
716
Len Brown4be44fc2005-08-05 00:44:28 -0400717 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
718 (walk_state->result_obj, walk_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
720 /*
721 * Delete the result op if and only if:
722 * Parent will not use the result -- such as any
723 * non-nested type2 op in a method (parent will be method)
724 */
Len Brown4be44fc2005-08-05 00:44:28 -0400725 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
726 walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728#ifdef _UNDER_DEVELOPMENT
729
730 if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
Len Brown4be44fc2005-08-05 00:44:28 -0400731 acpi_db_method_end(walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 }
733#endif
734
Bob Mooredefba1d2005-12-16 17:05:00 -0500735 /* Invoke exception handler on error */
736
737 if (ACPI_FAILURE(status)) {
738 status = acpi_ds_method_error(status, walk_state);
739 }
740
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 /* Always clear the object stack */
742
743 walk_state->num_operands = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400744 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745}