| 1 |
62 |
marcus.erl |
/*******************************************************************************
|
| 2 |
|
|
*
|
| 3 |
|
|
* Module Name: dsutils - Dispatcher utilities
|
| 4 |
|
|
*
|
| 5 |
|
|
******************************************************************************/
|
| 6 |
|
|
|
| 7 |
|
|
/*
|
| 8 |
|
|
* Copyright (C) 2000 - 2007, R. Byron Moore
|
| 9 |
|
|
* All rights reserved.
|
| 10 |
|
|
*
|
| 11 |
|
|
* Redistribution and use in source and binary forms, with or without
|
| 12 |
|
|
* modification, are permitted provided that the following conditions
|
| 13 |
|
|
* are met:
|
| 14 |
|
|
* 1. Redistributions of source code must retain the above copyright
|
| 15 |
|
|
* notice, this list of conditions, and the following disclaimer,
|
| 16 |
|
|
* without modification.
|
| 17 |
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
| 18 |
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
| 19 |
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
| 20 |
|
|
* including a substantially similar Disclaimer requirement for further
|
| 21 |
|
|
* binary redistribution.
|
| 22 |
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
| 23 |
|
|
* of any contributors may be used to endorse or promote products derived
|
| 24 |
|
|
* from this software without specific prior written permission.
|
| 25 |
|
|
*
|
| 26 |
|
|
* Alternatively, this software may be distributed under the terms of the
|
| 27 |
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
| 28 |
|
|
* Software Foundation.
|
| 29 |
|
|
*
|
| 30 |
|
|
* NO WARRANTY
|
| 31 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
| 32 |
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
| 33 |
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
| 34 |
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
| 35 |
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 36 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 37 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 38 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
| 39 |
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
| 40 |
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
| 41 |
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
| 42 |
|
|
*/
|
| 43 |
|
|
|
| 44 |
|
|
#include <acpi/acpi.h>
|
| 45 |
|
|
#include <acpi/acparser.h>
|
| 46 |
|
|
#include <acpi/amlcode.h>
|
| 47 |
|
|
#include <acpi/acdispat.h>
|
| 48 |
|
|
#include <acpi/acinterp.h>
|
| 49 |
|
|
#include <acpi/acnamesp.h>
|
| 50 |
|
|
#include <acpi/acdebug.h>
|
| 51 |
|
|
|
| 52 |
|
|
#define _COMPONENT ACPI_DISPATCHER
|
| 53 |
|
|
ACPI_MODULE_NAME("dsutils")
|
| 54 |
|
|
|
| 55 |
|
|
/*******************************************************************************
|
| 56 |
|
|
*
|
| 57 |
|
|
* FUNCTION: acpi_ds_clear_implicit_return
|
| 58 |
|
|
*
|
| 59 |
|
|
* PARAMETERS: walk_state - Current State
|
| 60 |
|
|
*
|
| 61 |
|
|
* RETURN: None.
|
| 62 |
|
|
*
|
| 63 |
|
|
* DESCRIPTION: Clear and remove a reference on an implicit return value. Used
|
| 64 |
|
|
* to delete "stale" return values (if enabled, the return value
|
| 65 |
|
|
* from every operator is saved at least momentarily, in case the
|
| 66 |
|
|
* parent method exits.)
|
| 67 |
|
|
*
|
| 68 |
|
|
******************************************************************************/
|
| 69 |
|
|
void acpi_ds_clear_implicit_return(struct acpi_walk_state *walk_state)
|
| 70 |
|
|
{
|
| 71 |
|
|
ACPI_FUNCTION_NAME(ds_clear_implicit_return);
|
| 72 |
|
|
|
| 73 |
|
|
/*
|
| 74 |
|
|
* Slack must be enabled for this feature
|
| 75 |
|
|
*/
|
| 76 |
|
|
if (!acpi_gbl_enable_interpreter_slack) {
|
| 77 |
|
|
return;
|
| 78 |
|
|
}
|
| 79 |
|
|
|
| 80 |
|
|
if (walk_state->implicit_return_obj) {
|
| 81 |
|
|
/*
|
| 82 |
|
|
* Delete any "stale" implicit return. However, in
|
| 83 |
|
|
* complex statements, the implicit return value can be
|
| 84 |
|
|
* bubbled up several levels.
|
| 85 |
|
|
*/
|
| 86 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
| 87 |
|
|
"Removing reference on stale implicit return obj %p\n",
|
| 88 |
|
|
walk_state->implicit_return_obj));
|
| 89 |
|
|
|
| 90 |
|
|
acpi_ut_remove_reference(walk_state->implicit_return_obj);
|
| 91 |
|
|
walk_state->implicit_return_obj = NULL;
|
| 92 |
|
|
}
|
| 93 |
|
|
}
|
| 94 |
|
|
|
| 95 |
|
|
#ifndef ACPI_NO_METHOD_EXECUTION
|
| 96 |
|
|
/*******************************************************************************
|
| 97 |
|
|
*
|
| 98 |
|
|
* FUNCTION: acpi_ds_do_implicit_return
|
| 99 |
|
|
*
|
| 100 |
|
|
* PARAMETERS: return_desc - The return value
|
| 101 |
|
|
* walk_state - Current State
|
| 102 |
|
|
* add_reference - True if a reference should be added to the
|
| 103 |
|
|
* return object
|
| 104 |
|
|
*
|
| 105 |
|
|
* RETURN: TRUE if implicit return enabled, FALSE otherwise
|
| 106 |
|
|
*
|
| 107 |
|
|
* DESCRIPTION: Implements the optional "implicit return". We save the result
|
| 108 |
|
|
* of every ASL operator and control method invocation in case the
|
| 109 |
|
|
* parent method exit. Before storing a new return value, we
|
| 110 |
|
|
* delete the previous return value.
|
| 111 |
|
|
*
|
| 112 |
|
|
******************************************************************************/
|
| 113 |
|
|
|
| 114 |
|
|
u8
|
| 115 |
|
|
acpi_ds_do_implicit_return(union acpi_operand_object *return_desc,
|
| 116 |
|
|
struct acpi_walk_state *walk_state, u8 add_reference)
|
| 117 |
|
|
{
|
| 118 |
|
|
ACPI_FUNCTION_NAME(ds_do_implicit_return);
|
| 119 |
|
|
|
| 120 |
|
|
/*
|
| 121 |
|
|
* Slack must be enabled for this feature, and we must
|
| 122 |
|
|
* have a valid return object
|
| 123 |
|
|
*/
|
| 124 |
|
|
if ((!acpi_gbl_enable_interpreter_slack) || (!return_desc)) {
|
| 125 |
|
|
return (FALSE);
|
| 126 |
|
|
}
|
| 127 |
|
|
|
| 128 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
| 129 |
|
|
"Result %p will be implicitly returned; Prev=%p\n",
|
| 130 |
|
|
return_desc, walk_state->implicit_return_obj));
|
| 131 |
|
|
|
| 132 |
|
|
/*
|
| 133 |
|
|
* Delete any "stale" implicit return value first. However, in
|
| 134 |
|
|
* complex statements, the implicit return value can be
|
| 135 |
|
|
* bubbled up several levels, so we don't clear the value if it
|
| 136 |
|
|
* is the same as the return_desc.
|
| 137 |
|
|
*/
|
| 138 |
|
|
if (walk_state->implicit_return_obj) {
|
| 139 |
|
|
if (walk_state->implicit_return_obj == return_desc) {
|
| 140 |
|
|
return (TRUE);
|
| 141 |
|
|
}
|
| 142 |
|
|
acpi_ds_clear_implicit_return(walk_state);
|
| 143 |
|
|
}
|
| 144 |
|
|
|
| 145 |
|
|
/* Save the implicit return value, add a reference if requested */
|
| 146 |
|
|
|
| 147 |
|
|
walk_state->implicit_return_obj = return_desc;
|
| 148 |
|
|
if (add_reference) {
|
| 149 |
|
|
acpi_ut_add_reference(return_desc);
|
| 150 |
|
|
}
|
| 151 |
|
|
|
| 152 |
|
|
return (TRUE);
|
| 153 |
|
|
}
|
| 154 |
|
|
|
| 155 |
|
|
/*******************************************************************************
|
| 156 |
|
|
*
|
| 157 |
|
|
* FUNCTION: acpi_ds_is_result_used
|
| 158 |
|
|
*
|
| 159 |
|
|
* PARAMETERS: Op - Current Op
|
| 160 |
|
|
* walk_state - Current State
|
| 161 |
|
|
*
|
| 162 |
|
|
* RETURN: TRUE if result is used, FALSE otherwise
|
| 163 |
|
|
*
|
| 164 |
|
|
* DESCRIPTION: Check if a result object will be used by the parent
|
| 165 |
|
|
*
|
| 166 |
|
|
******************************************************************************/
|
| 167 |
|
|
|
| 168 |
|
|
u8
|
| 169 |
|
|
acpi_ds_is_result_used(union acpi_parse_object * op,
|
| 170 |
|
|
struct acpi_walk_state * walk_state)
|
| 171 |
|
|
{
|
| 172 |
|
|
const struct acpi_opcode_info *parent_info;
|
| 173 |
|
|
|
| 174 |
|
|
ACPI_FUNCTION_TRACE_PTR(ds_is_result_used, op);
|
| 175 |
|
|
|
| 176 |
|
|
/* Must have both an Op and a Result Object */
|
| 177 |
|
|
|
| 178 |
|
|
if (!op) {
|
| 179 |
|
|
ACPI_ERROR((AE_INFO, "Null Op"));
|
| 180 |
|
|
return_UINT8(TRUE);
|
| 181 |
|
|
}
|
| 182 |
|
|
|
| 183 |
|
|
/*
|
| 184 |
|
|
* We know that this operator is not a
|
| 185 |
|
|
* Return() operator (would not come here.) The following code is the
|
| 186 |
|
|
* optional support for a so-called "implicit return". Some AML code
|
| 187 |
|
|
* assumes that the last value of the method is "implicitly" returned
|
| 188 |
|
|
* to the caller. Just save the last result as the return value.
|
| 189 |
|
|
* NOTE: this is optional because the ASL language does not actually
|
| 190 |
|
|
* support this behavior.
|
| 191 |
|
|
*/
|
| 192 |
|
|
(void)acpi_ds_do_implicit_return(walk_state->result_obj, walk_state,
|
| 193 |
|
|
TRUE);
|
| 194 |
|
|
|
| 195 |
|
|
/*
|
| 196 |
|
|
* Now determine if the parent will use the result
|
| 197 |
|
|
*
|
| 198 |
|
|
* If there is no parent, or the parent is a scope_op, we are executing
|
| 199 |
|
|
* at the method level. An executing method typically has no parent,
|
| 200 |
|
|
* since each method is parsed separately. A method invoked externally
|
| 201 |
|
|
* via execute_control_method has a scope_op as the parent.
|
| 202 |
|
|
*/
|
| 203 |
|
|
if ((!op->common.parent) ||
|
| 204 |
|
|
(op->common.parent->common.aml_opcode == AML_SCOPE_OP)) {
|
| 205 |
|
|
|
| 206 |
|
|
/* No parent, the return value cannot possibly be used */
|
| 207 |
|
|
|
| 208 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
| 209 |
|
|
"At Method level, result of [%s] not used\n",
|
| 210 |
|
|
acpi_ps_get_opcode_name(op->common.
|
| 211 |
|
|
aml_opcode)));
|
| 212 |
|
|
return_UINT8(FALSE);
|
| 213 |
|
|
}
|
| 214 |
|
|
|
| 215 |
|
|
/* Get info on the parent. The root_op is AML_SCOPE */
|
| 216 |
|
|
|
| 217 |
|
|
parent_info =
|
| 218 |
|
|
acpi_ps_get_opcode_info(op->common.parent->common.aml_opcode);
|
| 219 |
|
|
if (parent_info->class == AML_CLASS_UNKNOWN) {
|
| 220 |
|
|
ACPI_ERROR((AE_INFO, "Unknown parent opcode Op=%p", op));
|
| 221 |
|
|
return_UINT8(FALSE);
|
| 222 |
|
|
}
|
| 223 |
|
|
|
| 224 |
|
|
/*
|
| 225 |
|
|
* Decide what to do with the result based on the parent. If
|
| 226 |
|
|
* the parent opcode will not use the result, delete the object.
|
| 227 |
|
|
* Otherwise leave it as is, it will be deleted when it is used
|
| 228 |
|
|
* as an operand later.
|
| 229 |
|
|
*/
|
| 230 |
|
|
switch (parent_info->class) {
|
| 231 |
|
|
case AML_CLASS_CONTROL:
|
| 232 |
|
|
|
| 233 |
|
|
switch (op->common.parent->common.aml_opcode) {
|
| 234 |
|
|
case AML_RETURN_OP:
|
| 235 |
|
|
|
| 236 |
|
|
/* Never delete the return value associated with a return opcode */
|
| 237 |
|
|
|
| 238 |
|
|
goto result_used;
|
| 239 |
|
|
|
| 240 |
|
|
case AML_IF_OP:
|
| 241 |
|
|
case AML_WHILE_OP:
|
| 242 |
|
|
|
| 243 |
|
|
/*
|
| 244 |
|
|
* If we are executing the predicate AND this is the predicate op,
|
| 245 |
|
|
* we will use the return value
|
| 246 |
|
|
*/
|
| 247 |
|
|
if ((walk_state->control_state->common.state ==
|
| 248 |
|
|
ACPI_CONTROL_PREDICATE_EXECUTING)
|
| 249 |
|
|
&& (walk_state->control_state->control.
|
| 250 |
|
|
predicate_op == op)) {
|
| 251 |
|
|
goto result_used;
|
| 252 |
|
|
}
|
| 253 |
|
|
break;
|
| 254 |
|
|
|
| 255 |
|
|
default:
|
| 256 |
|
|
/* Ignore other control opcodes */
|
| 257 |
|
|
break;
|
| 258 |
|
|
}
|
| 259 |
|
|
|
| 260 |
|
|
/* The general control opcode returns no result */
|
| 261 |
|
|
|
| 262 |
|
|
goto result_not_used;
|
| 263 |
|
|
|
| 264 |
|
|
case AML_CLASS_CREATE:
|
| 265 |
|
|
|
| 266 |
|
|
/*
|
| 267 |
|
|
* These opcodes allow term_arg(s) as operands and therefore
|
| 268 |
|
|
* the operands can be method calls. The result is used.
|
| 269 |
|
|
*/
|
| 270 |
|
|
goto result_used;
|
| 271 |
|
|
|
| 272 |
|
|
case AML_CLASS_NAMED_OBJECT:
|
| 273 |
|
|
|
| 274 |
|
|
if ((op->common.parent->common.aml_opcode == AML_REGION_OP) ||
|
| 275 |
|
|
(op->common.parent->common.aml_opcode == AML_DATA_REGION_OP)
|
| 276 |
|
|
|| (op->common.parent->common.aml_opcode == AML_PACKAGE_OP)
|
| 277 |
|
|
|| (op->common.parent->common.aml_opcode ==
|
| 278 |
|
|
AML_VAR_PACKAGE_OP)
|
| 279 |
|
|
|| (op->common.parent->common.aml_opcode == AML_BUFFER_OP)
|
| 280 |
|
|
|| (op->common.parent->common.aml_opcode ==
|
| 281 |
|
|
AML_INT_EVAL_SUBTREE_OP)) {
|
| 282 |
|
|
/*
|
| 283 |
|
|
* These opcodes allow term_arg(s) as operands and therefore
|
| 284 |
|
|
* the operands can be method calls. The result is used.
|
| 285 |
|
|
*/
|
| 286 |
|
|
goto result_used;
|
| 287 |
|
|
}
|
| 288 |
|
|
|
| 289 |
|
|
goto result_not_used;
|
| 290 |
|
|
|
| 291 |
|
|
default:
|
| 292 |
|
|
|
| 293 |
|
|
/*
|
| 294 |
|
|
* In all other cases. the parent will actually use the return
|
| 295 |
|
|
* object, so keep it.
|
| 296 |
|
|
*/
|
| 297 |
|
|
goto result_used;
|
| 298 |
|
|
}
|
| 299 |
|
|
|
| 300 |
|
|
result_used:
|
| 301 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
| 302 |
|
|
"Result of [%s] used by Parent [%s] Op=%p\n",
|
| 303 |
|
|
acpi_ps_get_opcode_name(op->common.aml_opcode),
|
| 304 |
|
|
acpi_ps_get_opcode_name(op->common.parent->common.
|
| 305 |
|
|
aml_opcode), op));
|
| 306 |
|
|
|
| 307 |
|
|
return_UINT8(TRUE);
|
| 308 |
|
|
|
| 309 |
|
|
result_not_used:
|
| 310 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
| 311 |
|
|
"Result of [%s] not used by Parent [%s] Op=%p\n",
|
| 312 |
|
|
acpi_ps_get_opcode_name(op->common.aml_opcode),
|
| 313 |
|
|
acpi_ps_get_opcode_name(op->common.parent->common.
|
| 314 |
|
|
aml_opcode), op));
|
| 315 |
|
|
|
| 316 |
|
|
return_UINT8(FALSE);
|
| 317 |
|
|
}
|
| 318 |
|
|
|
| 319 |
|
|
/*******************************************************************************
|
| 320 |
|
|
*
|
| 321 |
|
|
* FUNCTION: acpi_ds_delete_result_if_not_used
|
| 322 |
|
|
*
|
| 323 |
|
|
* PARAMETERS: Op - Current parse Op
|
| 324 |
|
|
* result_obj - Result of the operation
|
| 325 |
|
|
* walk_state - Current state
|
| 326 |
|
|
*
|
| 327 |
|
|
* RETURN: Status
|
| 328 |
|
|
*
|
| 329 |
|
|
* DESCRIPTION: Used after interpretation of an opcode. If there is an internal
|
| 330 |
|
|
* result descriptor, check if the parent opcode will actually use
|
| 331 |
|
|
* this result. If not, delete the result now so that it will
|
| 332 |
|
|
* not become orphaned.
|
| 333 |
|
|
*
|
| 334 |
|
|
******************************************************************************/
|
| 335 |
|
|
|
| 336 |
|
|
void
|
| 337 |
|
|
acpi_ds_delete_result_if_not_used(union acpi_parse_object *op,
|
| 338 |
|
|
union acpi_operand_object *result_obj,
|
| 339 |
|
|
struct acpi_walk_state *walk_state)
|
| 340 |
|
|
{
|
| 341 |
|
|
union acpi_operand_object *obj_desc;
|
| 342 |
|
|
acpi_status status;
|
| 343 |
|
|
|
| 344 |
|
|
ACPI_FUNCTION_TRACE_PTR(ds_delete_result_if_not_used, result_obj);
|
| 345 |
|
|
|
| 346 |
|
|
if (!op) {
|
| 347 |
|
|
ACPI_ERROR((AE_INFO, "Null Op"));
|
| 348 |
|
|
return_VOID;
|
| 349 |
|
|
}
|
| 350 |
|
|
|
| 351 |
|
|
if (!result_obj) {
|
| 352 |
|
|
return_VOID;
|
| 353 |
|
|
}
|
| 354 |
|
|
|
| 355 |
|
|
if (!acpi_ds_is_result_used(op, walk_state)) {
|
| 356 |
|
|
|
| 357 |
|
|
/* Must pop the result stack (obj_desc should be equal to result_obj) */
|
| 358 |
|
|
|
| 359 |
|
|
status = acpi_ds_result_pop(&obj_desc, walk_state);
|
| 360 |
|
|
if (ACPI_SUCCESS(status)) {
|
| 361 |
|
|
acpi_ut_remove_reference(result_obj);
|
| 362 |
|
|
}
|
| 363 |
|
|
}
|
| 364 |
|
|
|
| 365 |
|
|
return_VOID;
|
| 366 |
|
|
}
|
| 367 |
|
|
|
| 368 |
|
|
/*******************************************************************************
|
| 369 |
|
|
*
|
| 370 |
|
|
* FUNCTION: acpi_ds_resolve_operands
|
| 371 |
|
|
*
|
| 372 |
|
|
* PARAMETERS: walk_state - Current walk state with operands on stack
|
| 373 |
|
|
*
|
| 374 |
|
|
* RETURN: Status
|
| 375 |
|
|
*
|
| 376 |
|
|
* DESCRIPTION: Resolve all operands to their values. Used to prepare
|
| 377 |
|
|
* arguments to a control method invocation (a call from one
|
| 378 |
|
|
* method to another.)
|
| 379 |
|
|
*
|
| 380 |
|
|
******************************************************************************/
|
| 381 |
|
|
|
| 382 |
|
|
acpi_status acpi_ds_resolve_operands(struct acpi_walk_state *walk_state)
|
| 383 |
|
|
{
|
| 384 |
|
|
u32 i;
|
| 385 |
|
|
acpi_status status = AE_OK;
|
| 386 |
|
|
|
| 387 |
|
|
ACPI_FUNCTION_TRACE_PTR(ds_resolve_operands, walk_state);
|
| 388 |
|
|
|
| 389 |
|
|
/*
|
| 390 |
|
|
* Attempt to resolve each of the valid operands
|
| 391 |
|
|
* Method arguments are passed by reference, not by value. This means
|
| 392 |
|
|
* that the actual objects are passed, not copies of the objects.
|
| 393 |
|
|
*/
|
| 394 |
|
|
for (i = 0; i < walk_state->num_operands; i++) {
|
| 395 |
|
|
status =
|
| 396 |
|
|
acpi_ex_resolve_to_value(&walk_state->operands[i],
|
| 397 |
|
|
walk_state);
|
| 398 |
|
|
if (ACPI_FAILURE(status)) {
|
| 399 |
|
|
break;
|
| 400 |
|
|
}
|
| 401 |
|
|
}
|
| 402 |
|
|
|
| 403 |
|
|
return_ACPI_STATUS(status);
|
| 404 |
|
|
}
|
| 405 |
|
|
|
| 406 |
|
|
/*******************************************************************************
|
| 407 |
|
|
*
|
| 408 |
|
|
* FUNCTION: acpi_ds_clear_operands
|
| 409 |
|
|
*
|
| 410 |
|
|
* PARAMETERS: walk_state - Current walk state with operands on stack
|
| 411 |
|
|
*
|
| 412 |
|
|
* RETURN: None
|
| 413 |
|
|
*
|
| 414 |
|
|
* DESCRIPTION: Clear all operands on the current walk state operand stack.
|
| 415 |
|
|
*
|
| 416 |
|
|
******************************************************************************/
|
| 417 |
|
|
|
| 418 |
|
|
void acpi_ds_clear_operands(struct acpi_walk_state *walk_state)
|
| 419 |
|
|
{
|
| 420 |
|
|
u32 i;
|
| 421 |
|
|
|
| 422 |
|
|
ACPI_FUNCTION_TRACE_PTR(ds_clear_operands, walk_state);
|
| 423 |
|
|
|
| 424 |
|
|
/* Remove a reference on each operand on the stack */
|
| 425 |
|
|
|
| 426 |
|
|
for (i = 0; i < walk_state->num_operands; i++) {
|
| 427 |
|
|
/*
|
| 428 |
|
|
* Remove a reference to all operands, including both
|
| 429 |
|
|
* "Arguments" and "Targets".
|
| 430 |
|
|
*/
|
| 431 |
|
|
acpi_ut_remove_reference(walk_state->operands[i]);
|
| 432 |
|
|
walk_state->operands[i] = NULL;
|
| 433 |
|
|
}
|
| 434 |
|
|
|
| 435 |
|
|
walk_state->num_operands = 0;
|
| 436 |
|
|
return_VOID;
|
| 437 |
|
|
}
|
| 438 |
|
|
#endif
|
| 439 |
|
|
|
| 440 |
|
|
/*******************************************************************************
|
| 441 |
|
|
*
|
| 442 |
|
|
* FUNCTION: acpi_ds_create_operand
|
| 443 |
|
|
*
|
| 444 |
|
|
* PARAMETERS: walk_state - Current walk state
|
| 445 |
|
|
* Arg - Parse object for the argument
|
| 446 |
|
|
* arg_index - Which argument (zero based)
|
| 447 |
|
|
*
|
| 448 |
|
|
* RETURN: Status
|
| 449 |
|
|
*
|
| 450 |
|
|
* DESCRIPTION: Translate a parse tree object that is an argument to an AML
|
| 451 |
|
|
* opcode to the equivalent interpreter object. This may include
|
| 452 |
|
|
* looking up a name or entering a new name into the internal
|
| 453 |
|
|
* namespace.
|
| 454 |
|
|
*
|
| 455 |
|
|
******************************************************************************/
|
| 456 |
|
|
|
| 457 |
|
|
acpi_status
|
| 458 |
|
|
acpi_ds_create_operand(struct acpi_walk_state *walk_state,
|
| 459 |
|
|
union acpi_parse_object *arg, u32 arg_index)
|
| 460 |
|
|
{
|
| 461 |
|
|
acpi_status status = AE_OK;
|
| 462 |
|
|
char *name_string;
|
| 463 |
|
|
u32 name_length;
|
| 464 |
|
|
union acpi_operand_object *obj_desc;
|
| 465 |
|
|
union acpi_parse_object *parent_op;
|
| 466 |
|
|
u16 opcode;
|
| 467 |
|
|
acpi_interpreter_mode interpreter_mode;
|
| 468 |
|
|
const struct acpi_opcode_info *op_info;
|
| 469 |
|
|
|
| 470 |
|
|
ACPI_FUNCTION_TRACE_PTR(ds_create_operand, arg);
|
| 471 |
|
|
|
| 472 |
|
|
/* A valid name must be looked up in the namespace */
|
| 473 |
|
|
|
| 474 |
|
|
if ((arg->common.aml_opcode == AML_INT_NAMEPATH_OP) &&
|
| 475 |
|
|
(arg->common.value.string)) {
|
| 476 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n",
|
| 477 |
|
|
arg));
|
| 478 |
|
|
|
| 479 |
|
|
/* Get the entire name string from the AML stream */
|
| 480 |
|
|
|
| 481 |
|
|
status =
|
| 482 |
|
|
acpi_ex_get_name_string(ACPI_TYPE_ANY,
|
| 483 |
|
|
arg->common.value.buffer,
|
| 484 |
|
|
&name_string, &name_length);
|
| 485 |
|
|
|
| 486 |
|
|
if (ACPI_FAILURE(status)) {
|
| 487 |
|
|
return_ACPI_STATUS(status);
|
| 488 |
|
|
}
|
| 489 |
|
|
|
| 490 |
|
|
/* All prefixes have been handled, and the name is in name_string */
|
| 491 |
|
|
|
| 492 |
|
|
/*
|
| 493 |
|
|
* Special handling for buffer_field declarations. This is a deferred
|
| 494 |
|
|
* opcode that unfortunately defines the field name as the last
|
| 495 |
|
|
* parameter instead of the first. We get here when we are performing
|
| 496 |
|
|
* the deferred execution, so the actual name of the field is already
|
| 497 |
|
|
* in the namespace. We don't want to attempt to look it up again
|
| 498 |
|
|
* because we may be executing in a different scope than where the
|
| 499 |
|
|
* actual opcode exists.
|
| 500 |
|
|
*/
|
| 501 |
|
|
if ((walk_state->deferred_node) &&
|
| 502 |
|
|
(walk_state->deferred_node->type == ACPI_TYPE_BUFFER_FIELD)
|
| 503 |
|
|
&& (arg_index ==
|
| 504 |
|
|
(u32) ((walk_state->opcode ==
|
| 505 |
|
|
AML_CREATE_FIELD_OP) ? 3 : 2))) {
|
| 506 |
|
|
obj_desc =
|
| 507 |
|
|
ACPI_CAST_PTR(union acpi_operand_object,
|
| 508 |
|
|
walk_state->deferred_node);
|
| 509 |
|
|
status = AE_OK;
|
| 510 |
|
|
} else { /* All other opcodes */
|
| 511 |
|
|
|
| 512 |
|
|
/*
|
| 513 |
|
|
* Differentiate between a namespace "create" operation
|
| 514 |
|
|
* versus a "lookup" operation (IMODE_LOAD_PASS2 vs.
|
| 515 |
|
|
* IMODE_EXECUTE) in order to support the creation of
|
| 516 |
|
|
* namespace objects during the execution of control methods.
|
| 517 |
|
|
*/
|
| 518 |
|
|
parent_op = arg->common.parent;
|
| 519 |
|
|
op_info =
|
| 520 |
|
|
acpi_ps_get_opcode_info(parent_op->common.
|
| 521 |
|
|
aml_opcode);
|
| 522 |
|
|
if ((op_info->flags & AML_NSNODE)
|
| 523 |
|
|
&& (parent_op->common.aml_opcode !=
|
| 524 |
|
|
AML_INT_METHODCALL_OP)
|
| 525 |
|
|
&& (parent_op->common.aml_opcode != AML_REGION_OP)
|
| 526 |
|
|
&& (parent_op->common.aml_opcode !=
|
| 527 |
|
|
AML_INT_NAMEPATH_OP)) {
|
| 528 |
|
|
|
| 529 |
|
|
/* Enter name into namespace if not found */
|
| 530 |
|
|
|
| 531 |
|
|
interpreter_mode = ACPI_IMODE_LOAD_PASS2;
|
| 532 |
|
|
} else {
|
| 533 |
|
|
/* Return a failure if name not found */
|
| 534 |
|
|
|
| 535 |
|
|
interpreter_mode = ACPI_IMODE_EXECUTE;
|
| 536 |
|
|
}
|
| 537 |
|
|
|
| 538 |
|
|
status =
|
| 539 |
|
|
acpi_ns_lookup(walk_state->scope_info, name_string,
|
| 540 |
|
|
ACPI_TYPE_ANY, interpreter_mode,
|
| 541 |
|
|
ACPI_NS_SEARCH_PARENT |
|
| 542 |
|
|
ACPI_NS_DONT_OPEN_SCOPE, walk_state,
|
| 543 |
|
|
ACPI_CAST_INDIRECT_PTR(struct
|
| 544 |
|
|
acpi_namespace_node,
|
| 545 |
|
|
&obj_desc));
|
| 546 |
|
|
/*
|
| 547 |
|
|
* The only case where we pass through (ignore) a NOT_FOUND
|
| 548 |
|
|
* error is for the cond_ref_of opcode.
|
| 549 |
|
|
*/
|
| 550 |
|
|
if (status == AE_NOT_FOUND) {
|
| 551 |
|
|
if (parent_op->common.aml_opcode ==
|
| 552 |
|
|
AML_COND_REF_OF_OP) {
|
| 553 |
|
|
/*
|
| 554 |
|
|
* For the Conditional Reference op, it's OK if
|
| 555 |
|
|
* the name is not found; We just need a way to
|
| 556 |
|
|
* indicate this to the interpreter, set the
|
| 557 |
|
|
* object to the root
|
| 558 |
|
|
*/
|
| 559 |
|
|
obj_desc = ACPI_CAST_PTR(union
|
| 560 |
|
|
acpi_operand_object,
|
| 561 |
|
|
acpi_gbl_root_node);
|
| 562 |
|
|
status = AE_OK;
|
| 563 |
|
|
} else {
|
| 564 |
|
|
/*
|
| 565 |
|
|
* We just plain didn't find it -- which is a
|
| 566 |
|
|
* very serious error at this point
|
| 567 |
|
|
*/
|
| 568 |
|
|
status = AE_AML_NAME_NOT_FOUND;
|
| 569 |
|
|
}
|
| 570 |
|
|
}
|
| 571 |
|
|
|
| 572 |
|
|
if (ACPI_FAILURE(status)) {
|
| 573 |
|
|
ACPI_ERROR_NAMESPACE(name_string, status);
|
| 574 |
|
|
}
|
| 575 |
|
|
}
|
| 576 |
|
|
|
| 577 |
|
|
/* Free the namestring created above */
|
| 578 |
|
|
|
| 579 |
|
|
ACPI_FREE(name_string);
|
| 580 |
|
|
|
| 581 |
|
|
/* Check status from the lookup */
|
| 582 |
|
|
|
| 583 |
|
|
if (ACPI_FAILURE(status)) {
|
| 584 |
|
|
return_ACPI_STATUS(status);
|
| 585 |
|
|
}
|
| 586 |
|
|
|
| 587 |
|
|
/* Put the resulting object onto the current object stack */
|
| 588 |
|
|
|
| 589 |
|
|
status = acpi_ds_obj_stack_push(obj_desc, walk_state);
|
| 590 |
|
|
if (ACPI_FAILURE(status)) {
|
| 591 |
|
|
return_ACPI_STATUS(status);
|
| 592 |
|
|
}
|
| 593 |
|
|
ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object
|
| 594 |
|
|
(obj_desc, walk_state));
|
| 595 |
|
|
} else {
|
| 596 |
|
|
/* Check for null name case */
|
| 597 |
|
|
|
| 598 |
|
|
if (arg->common.aml_opcode == AML_INT_NAMEPATH_OP) {
|
| 599 |
|
|
/*
|
| 600 |
|
|
* If the name is null, this means that this is an
|
| 601 |
|
|
* optional result parameter that was not specified
|
| 602 |
|
|
* in the original ASL. Create a Zero Constant for a
|
| 603 |
|
|
* placeholder. (Store to a constant is a Noop.)
|
| 604 |
|
|
*/
|
| 605 |
|
|
opcode = AML_ZERO_OP; /* Has no arguments! */
|
| 606 |
|
|
|
| 607 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
| 608 |
|
|
"Null namepath: Arg=%p\n", arg));
|
| 609 |
|
|
} else {
|
| 610 |
|
|
opcode = arg->common.aml_opcode;
|
| 611 |
|
|
}
|
| 612 |
|
|
|
| 613 |
|
|
/* Get the object type of the argument */
|
| 614 |
|
|
|
| 615 |
|
|
op_info = acpi_ps_get_opcode_info(opcode);
|
| 616 |
|
|
if (op_info->object_type == ACPI_TYPE_INVALID) {
|
| 617 |
|
|
return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
|
| 618 |
|
|
}
|
| 619 |
|
|
|
| 620 |
|
|
if (op_info->flags & AML_HAS_RETVAL) {
|
| 621 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
| 622 |
|
|
"Argument previously created, already stacked\n"));
|
| 623 |
|
|
|
| 624 |
|
|
ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object
|
| 625 |
|
|
(walk_state->
|
| 626 |
|
|
operands[walk_state->num_operands -
|
| 627 |
|
|
1], walk_state));
|
| 628 |
|
|
|
| 629 |
|
|
/*
|
| 630 |
|
|
* Use value that was already previously returned
|
| 631 |
|
|
* by the evaluation of this argument
|
| 632 |
|
|
*/
|
| 633 |
|
|
status =
|
| 634 |
|
|
acpi_ds_result_pop_from_bottom(&obj_desc,
|
| 635 |
|
|
walk_state);
|
| 636 |
|
|
if (ACPI_FAILURE(status)) {
|
| 637 |
|
|
/*
|
| 638 |
|
|
* Only error is underflow, and this indicates
|
| 639 |
|
|
* a missing or null operand!
|
| 640 |
|
|
*/
|
| 641 |
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
| 642 |
|
|
"Missing or null operand"));
|
| 643 |
|
|
return_ACPI_STATUS(status);
|
| 644 |
|
|
}
|
| 645 |
|
|
} else {
|
| 646 |
|
|
/* Create an ACPI_INTERNAL_OBJECT for the argument */
|
| 647 |
|
|
|
| 648 |
|
|
obj_desc =
|
| 649 |
|
|
acpi_ut_create_internal_object(op_info->
|
| 650 |
|
|
object_type);
|
| 651 |
|
|
if (!obj_desc) {
|
| 652 |
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
| 653 |
|
|
}
|
| 654 |
|
|
|
| 655 |
|
|
/* Initialize the new object */
|
| 656 |
|
|
|
| 657 |
|
|
status =
|
| 658 |
|
|
acpi_ds_init_object_from_op(walk_state, arg, opcode,
|
| 659 |
|
|
&obj_desc);
|
| 660 |
|
|
if (ACPI_FAILURE(status)) {
|
| 661 |
|
|
acpi_ut_delete_object_desc(obj_desc);
|
| 662 |
|
|
return_ACPI_STATUS(status);
|
| 663 |
|
|
}
|
| 664 |
|
|
}
|
| 665 |
|
|
|
| 666 |
|
|
/* Put the operand object on the object stack */
|
| 667 |
|
|
|
| 668 |
|
|
status = acpi_ds_obj_stack_push(obj_desc, walk_state);
|
| 669 |
|
|
if (ACPI_FAILURE(status)) {
|
| 670 |
|
|
return_ACPI_STATUS(status);
|
| 671 |
|
|
}
|
| 672 |
|
|
|
| 673 |
|
|
ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object
|
| 674 |
|
|
(obj_desc, walk_state));
|
| 675 |
|
|
}
|
| 676 |
|
|
|
| 677 |
|
|
return_ACPI_STATUS(AE_OK);
|
| 678 |
|
|
}
|
| 679 |
|
|
|
| 680 |
|
|
/*******************************************************************************
|
| 681 |
|
|
*
|
| 682 |
|
|
* FUNCTION: acpi_ds_create_operands
|
| 683 |
|
|
*
|
| 684 |
|
|
* PARAMETERS: walk_state - Current state
|
| 685 |
|
|
* first_arg - First argument of a parser argument tree
|
| 686 |
|
|
*
|
| 687 |
|
|
* RETURN: Status
|
| 688 |
|
|
*
|
| 689 |
|
|
* DESCRIPTION: Convert an operator's arguments from a parse tree format to
|
| 690 |
|
|
* namespace objects and place those argument object on the object
|
| 691 |
|
|
* stack in preparation for evaluation by the interpreter.
|
| 692 |
|
|
*
|
| 693 |
|
|
******************************************************************************/
|
| 694 |
|
|
|
| 695 |
|
|
acpi_status
|
| 696 |
|
|
acpi_ds_create_operands(struct acpi_walk_state *walk_state,
|
| 697 |
|
|
union acpi_parse_object *first_arg)
|
| 698 |
|
|
{
|
| 699 |
|
|
acpi_status status = AE_OK;
|
| 700 |
|
|
union acpi_parse_object *arg;
|
| 701 |
|
|
u32 arg_count = 0;
|
| 702 |
|
|
|
| 703 |
|
|
ACPI_FUNCTION_TRACE_PTR(ds_create_operands, first_arg);
|
| 704 |
|
|
|
| 705 |
|
|
/* For all arguments in the list... */
|
| 706 |
|
|
|
| 707 |
|
|
arg = first_arg;
|
| 708 |
|
|
while (arg) {
|
| 709 |
|
|
status = acpi_ds_create_operand(walk_state, arg, arg_count);
|
| 710 |
|
|
if (ACPI_FAILURE(status)) {
|
| 711 |
|
|
goto cleanup;
|
| 712 |
|
|
}
|
| 713 |
|
|
|
| 714 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
| 715 |
|
|
"Arg #%d (%p) done, Arg1=%p\n", arg_count,
|
| 716 |
|
|
arg, first_arg));
|
| 717 |
|
|
|
| 718 |
|
|
/* Move on to next argument, if any */
|
| 719 |
|
|
|
| 720 |
|
|
arg = arg->common.next;
|
| 721 |
|
|
arg_count++;
|
| 722 |
|
|
}
|
| 723 |
|
|
|
| 724 |
|
|
return_ACPI_STATUS(status);
|
| 725 |
|
|
|
| 726 |
|
|
cleanup:
|
| 727 |
|
|
/*
|
| 728 |
|
|
* We must undo everything done above; meaning that we must
|
| 729 |
|
|
* pop everything off of the operand stack and delete those
|
| 730 |
|
|
* objects
|
| 731 |
|
|
*/
|
| 732 |
|
|
(void)acpi_ds_obj_stack_pop_and_delete(arg_count, walk_state);
|
| 733 |
|
|
|
| 734 |
|
|
ACPI_EXCEPTION((AE_INFO, status, "While creating Arg %d",
|
| 735 |
|
|
(arg_count + 1)));
|
| 736 |
|
|
return_ACPI_STATUS(status);
|
| 737 |
|
|
}
|
