| 1 |
62 |
marcus.erl |
|
| 2 |
|
|
/******************************************************************************
|
| 3 |
|
|
*
|
| 4 |
|
|
* Module Name: exresolv - AML Interpreter object resolution
|
| 5 |
|
|
*
|
| 6 |
|
|
*****************************************************************************/
|
| 7 |
|
|
|
| 8 |
|
|
/*
|
| 9 |
|
|
* Copyright (C) 2000 - 2007, R. Byron Moore
|
| 10 |
|
|
* 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 |
|
|
|
| 45 |
|
|
#include <acpi/acpi.h>
|
| 46 |
|
|
#include <acpi/amlcode.h>
|
| 47 |
|
|
#include <acpi/acdispat.h>
|
| 48 |
|
|
#include <acpi/acinterp.h>
|
| 49 |
|
|
#include <acpi/acnamesp.h>
|
| 50 |
|
|
#include <acpi/acparser.h>
|
| 51 |
|
|
|
| 52 |
|
|
#define _COMPONENT ACPI_EXECUTER
|
| 53 |
|
|
ACPI_MODULE_NAME("exresolv")
|
| 54 |
|
|
|
| 55 |
|
|
/* Local prototypes */
|
| 56 |
|
|
static acpi_status
|
| 57 |
|
|
acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
|
| 58 |
|
|
struct acpi_walk_state *walk_state);
|
| 59 |
|
|
|
| 60 |
|
|
/*******************************************************************************
|
| 61 |
|
|
*
|
| 62 |
|
|
* FUNCTION: acpi_ex_resolve_to_value
|
| 63 |
|
|
*
|
| 64 |
|
|
* PARAMETERS: **stack_ptr - Points to entry on obj_stack, which can
|
| 65 |
|
|
* be either an (union acpi_operand_object *)
|
| 66 |
|
|
* or an acpi_handle.
|
| 67 |
|
|
* walk_state - Current method state
|
| 68 |
|
|
*
|
| 69 |
|
|
* RETURN: Status
|
| 70 |
|
|
*
|
| 71 |
|
|
* DESCRIPTION: Convert Reference objects to values
|
| 72 |
|
|
*
|
| 73 |
|
|
******************************************************************************/
|
| 74 |
|
|
|
| 75 |
|
|
acpi_status
|
| 76 |
|
|
acpi_ex_resolve_to_value(union acpi_operand_object **stack_ptr,
|
| 77 |
|
|
struct acpi_walk_state *walk_state)
|
| 78 |
|
|
{
|
| 79 |
|
|
acpi_status status;
|
| 80 |
|
|
|
| 81 |
|
|
ACPI_FUNCTION_TRACE_PTR(ex_resolve_to_value, stack_ptr);
|
| 82 |
|
|
|
| 83 |
|
|
if (!stack_ptr || !*stack_ptr) {
|
| 84 |
|
|
ACPI_ERROR((AE_INFO, "Internal - null pointer"));
|
| 85 |
|
|
return_ACPI_STATUS(AE_AML_NO_OPERAND);
|
| 86 |
|
|
}
|
| 87 |
|
|
|
| 88 |
|
|
/*
|
| 89 |
|
|
* The entity pointed to by the stack_ptr can be either
|
| 90 |
|
|
* 1) A valid union acpi_operand_object, or
|
| 91 |
|
|
* 2) A struct acpi_namespace_node (named_obj)
|
| 92 |
|
|
*/
|
| 93 |
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_OPERAND) {
|
| 94 |
|
|
status = acpi_ex_resolve_object_to_value(stack_ptr, walk_state);
|
| 95 |
|
|
if (ACPI_FAILURE(status)) {
|
| 96 |
|
|
return_ACPI_STATUS(status);
|
| 97 |
|
|
}
|
| 98 |
|
|
|
| 99 |
|
|
if (!*stack_ptr) {
|
| 100 |
|
|
ACPI_ERROR((AE_INFO, "Internal - null pointer"));
|
| 101 |
|
|
return_ACPI_STATUS(AE_AML_NO_OPERAND);
|
| 102 |
|
|
}
|
| 103 |
|
|
}
|
| 104 |
|
|
|
| 105 |
|
|
/*
|
| 106 |
|
|
* Object on the stack may have changed if acpi_ex_resolve_object_to_value()
|
| 107 |
|
|
* was called (i.e., we can't use an _else_ here.)
|
| 108 |
|
|
*/
|
| 109 |
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_NAMED) {
|
| 110 |
|
|
status =
|
| 111 |
|
|
acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
|
| 112 |
|
|
(struct acpi_namespace_node,
|
| 113 |
|
|
stack_ptr), walk_state);
|
| 114 |
|
|
if (ACPI_FAILURE(status)) {
|
| 115 |
|
|
return_ACPI_STATUS(status);
|
| 116 |
|
|
}
|
| 117 |
|
|
}
|
| 118 |
|
|
|
| 119 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Resolved object %p\n", *stack_ptr));
|
| 120 |
|
|
return_ACPI_STATUS(AE_OK);
|
| 121 |
|
|
}
|
| 122 |
|
|
|
| 123 |
|
|
/*******************************************************************************
|
| 124 |
|
|
*
|
| 125 |
|
|
* FUNCTION: acpi_ex_resolve_object_to_value
|
| 126 |
|
|
*
|
| 127 |
|
|
* PARAMETERS: stack_ptr - Pointer to an internal object
|
| 128 |
|
|
* walk_state - Current method state
|
| 129 |
|
|
*
|
| 130 |
|
|
* RETURN: Status
|
| 131 |
|
|
*
|
| 132 |
|
|
* DESCRIPTION: Retrieve the value from an internal object. The Reference type
|
| 133 |
|
|
* uses the associated AML opcode to determine the value.
|
| 134 |
|
|
*
|
| 135 |
|
|
******************************************************************************/
|
| 136 |
|
|
|
| 137 |
|
|
static acpi_status
|
| 138 |
|
|
acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
|
| 139 |
|
|
struct acpi_walk_state *walk_state)
|
| 140 |
|
|
{
|
| 141 |
|
|
acpi_status status = AE_OK;
|
| 142 |
|
|
union acpi_operand_object *stack_desc;
|
| 143 |
|
|
void *temp_node;
|
| 144 |
|
|
union acpi_operand_object *obj_desc = NULL;
|
| 145 |
|
|
u16 opcode;
|
| 146 |
|
|
|
| 147 |
|
|
ACPI_FUNCTION_TRACE(ex_resolve_object_to_value);
|
| 148 |
|
|
|
| 149 |
|
|
stack_desc = *stack_ptr;
|
| 150 |
|
|
|
| 151 |
|
|
/* This is an union acpi_operand_object */
|
| 152 |
|
|
|
| 153 |
|
|
switch (ACPI_GET_OBJECT_TYPE(stack_desc)) {
|
| 154 |
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
| 155 |
|
|
|
| 156 |
|
|
opcode = stack_desc->reference.opcode;
|
| 157 |
|
|
|
| 158 |
|
|
switch (opcode) {
|
| 159 |
|
|
case AML_NAME_OP:
|
| 160 |
|
|
|
| 161 |
|
|
/*
|
| 162 |
|
|
* Convert name reference to a namespace node
|
| 163 |
|
|
* Then, acpi_ex_resolve_node_to_value can be used to get the value
|
| 164 |
|
|
*/
|
| 165 |
|
|
temp_node = stack_desc->reference.object;
|
| 166 |
|
|
|
| 167 |
|
|
/* Delete the Reference Object */
|
| 168 |
|
|
|
| 169 |
|
|
acpi_ut_remove_reference(stack_desc);
|
| 170 |
|
|
|
| 171 |
|
|
/* Return the namespace node */
|
| 172 |
|
|
|
| 173 |
|
|
(*stack_ptr) = temp_node;
|
| 174 |
|
|
break;
|
| 175 |
|
|
|
| 176 |
|
|
case AML_LOCAL_OP:
|
| 177 |
|
|
case AML_ARG_OP:
|
| 178 |
|
|
|
| 179 |
|
|
/*
|
| 180 |
|
|
* Get the local from the method's state info
|
| 181 |
|
|
* Note: this increments the local's object reference count
|
| 182 |
|
|
*/
|
| 183 |
|
|
status = acpi_ds_method_data_get_value(opcode,
|
| 184 |
|
|
stack_desc->
|
| 185 |
|
|
reference.offset,
|
| 186 |
|
|
walk_state,
|
| 187 |
|
|
&obj_desc);
|
| 188 |
|
|
if (ACPI_FAILURE(status)) {
|
| 189 |
|
|
return_ACPI_STATUS(status);
|
| 190 |
|
|
}
|
| 191 |
|
|
|
| 192 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
| 193 |
|
|
"[Arg/Local %X] ValueObj is %p\n",
|
| 194 |
|
|
stack_desc->reference.offset,
|
| 195 |
|
|
obj_desc));
|
| 196 |
|
|
|
| 197 |
|
|
/*
|
| 198 |
|
|
* Now we can delete the original Reference Object and
|
| 199 |
|
|
* replace it with the resolved value
|
| 200 |
|
|
*/
|
| 201 |
|
|
acpi_ut_remove_reference(stack_desc);
|
| 202 |
|
|
*stack_ptr = obj_desc;
|
| 203 |
|
|
break;
|
| 204 |
|
|
|
| 205 |
|
|
case AML_INDEX_OP:
|
| 206 |
|
|
|
| 207 |
|
|
switch (stack_desc->reference.target_type) {
|
| 208 |
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
| 209 |
|
|
|
| 210 |
|
|
/* Just return - leave the Reference on the stack */
|
| 211 |
|
|
break;
|
| 212 |
|
|
|
| 213 |
|
|
case ACPI_TYPE_PACKAGE:
|
| 214 |
|
|
|
| 215 |
|
|
obj_desc = *stack_desc->reference.where;
|
| 216 |
|
|
if (obj_desc) {
|
| 217 |
|
|
/*
|
| 218 |
|
|
* Valid obj descriptor, copy pointer to return value
|
| 219 |
|
|
* (i.e., dereference the package index)
|
| 220 |
|
|
* Delete the ref object, increment the returned object
|
| 221 |
|
|
*/
|
| 222 |
|
|
acpi_ut_remove_reference(stack_desc);
|
| 223 |
|
|
acpi_ut_add_reference(obj_desc);
|
| 224 |
|
|
*stack_ptr = obj_desc;
|
| 225 |
|
|
} else {
|
| 226 |
|
|
/*
|
| 227 |
|
|
* A NULL object descriptor means an unitialized element of
|
| 228 |
|
|
* the package, can't dereference it
|
| 229 |
|
|
*/
|
| 230 |
|
|
ACPI_ERROR((AE_INFO,
|
| 231 |
|
|
"Attempt to deref an Index to NULL pkg element Idx=%p",
|
| 232 |
|
|
stack_desc));
|
| 233 |
|
|
status = AE_AML_UNINITIALIZED_ELEMENT;
|
| 234 |
|
|
}
|
| 235 |
|
|
break;
|
| 236 |
|
|
|
| 237 |
|
|
default:
|
| 238 |
|
|
|
| 239 |
|
|
/* Invalid reference object */
|
| 240 |
|
|
|
| 241 |
|
|
ACPI_ERROR((AE_INFO,
|
| 242 |
|
|
"Unknown TargetType %X in Index/Reference obj %p",
|
| 243 |
|
|
stack_desc->reference.target_type,
|
| 244 |
|
|
stack_desc));
|
| 245 |
|
|
status = AE_AML_INTERNAL;
|
| 246 |
|
|
break;
|
| 247 |
|
|
}
|
| 248 |
|
|
break;
|
| 249 |
|
|
|
| 250 |
|
|
case AML_REF_OF_OP:
|
| 251 |
|
|
case AML_DEBUG_OP:
|
| 252 |
|
|
case AML_LOAD_OP:
|
| 253 |
|
|
|
| 254 |
|
|
/* Just leave the object as-is */
|
| 255 |
|
|
|
| 256 |
|
|
break;
|
| 257 |
|
|
|
| 258 |
|
|
case AML_INT_NAMEPATH_OP: /* Reference to a named object */
|
| 259 |
|
|
|
| 260 |
|
|
/* Dereference the name */
|
| 261 |
|
|
|
| 262 |
|
|
if ((stack_desc->reference.node->type ==
|
| 263 |
|
|
ACPI_TYPE_DEVICE)
|
| 264 |
|
|
|| (stack_desc->reference.node->type ==
|
| 265 |
|
|
ACPI_TYPE_THERMAL)) {
|
| 266 |
|
|
|
| 267 |
|
|
/* These node types do not have 'real' subobjects */
|
| 268 |
|
|
|
| 269 |
|
|
*stack_ptr = (void *)stack_desc->reference.node;
|
| 270 |
|
|
} else {
|
| 271 |
|
|
/* Get the object pointed to by the namespace node */
|
| 272 |
|
|
|
| 273 |
|
|
*stack_ptr =
|
| 274 |
|
|
(stack_desc->reference.node)->object;
|
| 275 |
|
|
acpi_ut_add_reference(*stack_ptr);
|
| 276 |
|
|
}
|
| 277 |
|
|
|
| 278 |
|
|
acpi_ut_remove_reference(stack_desc);
|
| 279 |
|
|
break;
|
| 280 |
|
|
|
| 281 |
|
|
default:
|
| 282 |
|
|
|
| 283 |
|
|
ACPI_ERROR((AE_INFO,
|
| 284 |
|
|
"Unknown Reference opcode %X (%s) in %p",
|
| 285 |
|
|
opcode, acpi_ps_get_opcode_name(opcode),
|
| 286 |
|
|
stack_desc));
|
| 287 |
|
|
status = AE_AML_INTERNAL;
|
| 288 |
|
|
break;
|
| 289 |
|
|
}
|
| 290 |
|
|
break;
|
| 291 |
|
|
|
| 292 |
|
|
case ACPI_TYPE_BUFFER:
|
| 293 |
|
|
|
| 294 |
|
|
status = acpi_ds_get_buffer_arguments(stack_desc);
|
| 295 |
|
|
break;
|
| 296 |
|
|
|
| 297 |
|
|
case ACPI_TYPE_PACKAGE:
|
| 298 |
|
|
|
| 299 |
|
|
status = acpi_ds_get_package_arguments(stack_desc);
|
| 300 |
|
|
break;
|
| 301 |
|
|
|
| 302 |
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
| 303 |
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
| 304 |
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
| 305 |
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
| 306 |
|
|
|
| 307 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
| 308 |
|
|
"FieldRead SourceDesc=%p Type=%X\n",
|
| 309 |
|
|
stack_desc,
|
| 310 |
|
|
ACPI_GET_OBJECT_TYPE(stack_desc)));
|
| 311 |
|
|
|
| 312 |
|
|
status =
|
| 313 |
|
|
acpi_ex_read_data_from_field(walk_state, stack_desc,
|
| 314 |
|
|
&obj_desc);
|
| 315 |
|
|
|
| 316 |
|
|
/* Remove a reference to the original operand, then override */
|
| 317 |
|
|
|
| 318 |
|
|
acpi_ut_remove_reference(*stack_ptr);
|
| 319 |
|
|
*stack_ptr = (void *)obj_desc;
|
| 320 |
|
|
break;
|
| 321 |
|
|
|
| 322 |
|
|
default:
|
| 323 |
|
|
break;
|
| 324 |
|
|
}
|
| 325 |
|
|
|
| 326 |
|
|
return_ACPI_STATUS(status);
|
| 327 |
|
|
}
|
| 328 |
|
|
|
| 329 |
|
|
/*******************************************************************************
|
| 330 |
|
|
*
|
| 331 |
|
|
* FUNCTION: acpi_ex_resolve_multiple
|
| 332 |
|
|
*
|
| 333 |
|
|
* PARAMETERS: walk_state - Current state (contains AML opcode)
|
| 334 |
|
|
* Operand - Starting point for resolution
|
| 335 |
|
|
* return_type - Where the object type is returned
|
| 336 |
|
|
* return_desc - Where the resolved object is returned
|
| 337 |
|
|
*
|
| 338 |
|
|
* RETURN: Status
|
| 339 |
|
|
*
|
| 340 |
|
|
* DESCRIPTION: Return the base object and type. Traverse a reference list if
|
| 341 |
|
|
* necessary to get to the base object.
|
| 342 |
|
|
*
|
| 343 |
|
|
******************************************************************************/
|
| 344 |
|
|
|
| 345 |
|
|
acpi_status
|
| 346 |
|
|
acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
|
| 347 |
|
|
union acpi_operand_object *operand,
|
| 348 |
|
|
acpi_object_type * return_type,
|
| 349 |
|
|
union acpi_operand_object **return_desc)
|
| 350 |
|
|
{
|
| 351 |
|
|
union acpi_operand_object *obj_desc = (void *)operand;
|
| 352 |
|
|
struct acpi_namespace_node *node;
|
| 353 |
|
|
acpi_object_type type;
|
| 354 |
|
|
acpi_status status;
|
| 355 |
|
|
|
| 356 |
|
|
ACPI_FUNCTION_TRACE(acpi_ex_resolve_multiple);
|
| 357 |
|
|
|
| 358 |
|
|
/* Operand can be either a namespace node or an operand descriptor */
|
| 359 |
|
|
|
| 360 |
|
|
switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
|
| 361 |
|
|
case ACPI_DESC_TYPE_OPERAND:
|
| 362 |
|
|
type = obj_desc->common.type;
|
| 363 |
|
|
break;
|
| 364 |
|
|
|
| 365 |
|
|
case ACPI_DESC_TYPE_NAMED:
|
| 366 |
|
|
type = ((struct acpi_namespace_node *)obj_desc)->type;
|
| 367 |
|
|
obj_desc =
|
| 368 |
|
|
acpi_ns_get_attached_object((struct acpi_namespace_node *)
|
| 369 |
|
|
obj_desc);
|
| 370 |
|
|
|
| 371 |
|
|
/* If we had an Alias node, use the attached object for type info */
|
| 372 |
|
|
|
| 373 |
|
|
if (type == ACPI_TYPE_LOCAL_ALIAS) {
|
| 374 |
|
|
type = ((struct acpi_namespace_node *)obj_desc)->type;
|
| 375 |
|
|
obj_desc =
|
| 376 |
|
|
acpi_ns_get_attached_object((struct
|
| 377 |
|
|
acpi_namespace_node *)
|
| 378 |
|
|
obj_desc);
|
| 379 |
|
|
}
|
| 380 |
|
|
break;
|
| 381 |
|
|
|
| 382 |
|
|
default:
|
| 383 |
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
| 384 |
|
|
}
|
| 385 |
|
|
|
| 386 |
|
|
/* If type is anything other than a reference, we are done */
|
| 387 |
|
|
|
| 388 |
|
|
if (type != ACPI_TYPE_LOCAL_REFERENCE) {
|
| 389 |
|
|
goto exit;
|
| 390 |
|
|
}
|
| 391 |
|
|
|
| 392 |
|
|
/*
|
| 393 |
|
|
* For reference objects created via the ref_of or Index operators,
|
| 394 |
|
|
* we need to get to the base object (as per the ACPI specification
|
| 395 |
|
|
* of the object_type and size_of operators). This means traversing
|
| 396 |
|
|
* the list of possibly many nested references.
|
| 397 |
|
|
*/
|
| 398 |
|
|
while (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_REFERENCE) {
|
| 399 |
|
|
switch (obj_desc->reference.opcode) {
|
| 400 |
|
|
case AML_REF_OF_OP:
|
| 401 |
|
|
case AML_INT_NAMEPATH_OP:
|
| 402 |
|
|
|
| 403 |
|
|
/* Dereference the reference pointer */
|
| 404 |
|
|
|
| 405 |
|
|
if (obj_desc->reference.opcode == AML_REF_OF_OP) {
|
| 406 |
|
|
node = obj_desc->reference.object;
|
| 407 |
|
|
} else { /* AML_INT_NAMEPATH_OP */
|
| 408 |
|
|
|
| 409 |
|
|
node = obj_desc->reference.node;
|
| 410 |
|
|
}
|
| 411 |
|
|
|
| 412 |
|
|
/* All "References" point to a NS node */
|
| 413 |
|
|
|
| 414 |
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(node) !=
|
| 415 |
|
|
ACPI_DESC_TYPE_NAMED) {
|
| 416 |
|
|
ACPI_ERROR((AE_INFO, "Not a NS node %p [%s]",
|
| 417 |
|
|
node,
|
| 418 |
|
|
acpi_ut_get_descriptor_name(node)));
|
| 419 |
|
|
return_ACPI_STATUS(AE_AML_INTERNAL);
|
| 420 |
|
|
}
|
| 421 |
|
|
|
| 422 |
|
|
/* Get the attached object */
|
| 423 |
|
|
|
| 424 |
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
| 425 |
|
|
if (!obj_desc) {
|
| 426 |
|
|
|
| 427 |
|
|
/* No object, use the NS node type */
|
| 428 |
|
|
|
| 429 |
|
|
type = acpi_ns_get_type(node);
|
| 430 |
|
|
goto exit;
|
| 431 |
|
|
}
|
| 432 |
|
|
|
| 433 |
|
|
/* Check for circular references */
|
| 434 |
|
|
|
| 435 |
|
|
if (obj_desc == operand) {
|
| 436 |
|
|
return_ACPI_STATUS(AE_AML_CIRCULAR_REFERENCE);
|
| 437 |
|
|
}
|
| 438 |
|
|
break;
|
| 439 |
|
|
|
| 440 |
|
|
case AML_INDEX_OP:
|
| 441 |
|
|
|
| 442 |
|
|
/* Get the type of this reference (index into another object) */
|
| 443 |
|
|
|
| 444 |
|
|
type = obj_desc->reference.target_type;
|
| 445 |
|
|
if (type != ACPI_TYPE_PACKAGE) {
|
| 446 |
|
|
goto exit;
|
| 447 |
|
|
}
|
| 448 |
|
|
|
| 449 |
|
|
/*
|
| 450 |
|
|
* The main object is a package, we want to get the type
|
| 451 |
|
|
* of the individual package element that is referenced by
|
| 452 |
|
|
* the index.
|
| 453 |
|
|
*
|
| 454 |
|
|
* This could of course in turn be another reference object.
|
| 455 |
|
|
*/
|
| 456 |
|
|
obj_desc = *(obj_desc->reference.where);
|
| 457 |
|
|
if (!obj_desc) {
|
| 458 |
|
|
|
| 459 |
|
|
/* NULL package elements are allowed */
|
| 460 |
|
|
|
| 461 |
|
|
type = 0; /* Uninitialized */
|
| 462 |
|
|
goto exit;
|
| 463 |
|
|
}
|
| 464 |
|
|
break;
|
| 465 |
|
|
|
| 466 |
|
|
case AML_LOCAL_OP:
|
| 467 |
|
|
case AML_ARG_OP:
|
| 468 |
|
|
|
| 469 |
|
|
if (return_desc) {
|
| 470 |
|
|
status =
|
| 471 |
|
|
acpi_ds_method_data_get_value(obj_desc->
|
| 472 |
|
|
reference.
|
| 473 |
|
|
opcode,
|
| 474 |
|
|
obj_desc->
|
| 475 |
|
|
reference.
|
| 476 |
|
|
offset,
|
| 477 |
|
|
walk_state,
|
| 478 |
|
|
&obj_desc);
|
| 479 |
|
|
if (ACPI_FAILURE(status)) {
|
| 480 |
|
|
return_ACPI_STATUS(status);
|
| 481 |
|
|
}
|
| 482 |
|
|
acpi_ut_remove_reference(obj_desc);
|
| 483 |
|
|
} else {
|
| 484 |
|
|
status =
|
| 485 |
|
|
acpi_ds_method_data_get_node(obj_desc->
|
| 486 |
|
|
reference.
|
| 487 |
|
|
opcode,
|
| 488 |
|
|
obj_desc->
|
| 489 |
|
|
reference.
|
| 490 |
|
|
offset,
|
| 491 |
|
|
walk_state,
|
| 492 |
|
|
&node);
|
| 493 |
|
|
if (ACPI_FAILURE(status)) {
|
| 494 |
|
|
return_ACPI_STATUS(status);
|
| 495 |
|
|
}
|
| 496 |
|
|
|
| 497 |
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
| 498 |
|
|
if (!obj_desc) {
|
| 499 |
|
|
type = ACPI_TYPE_ANY;
|
| 500 |
|
|
goto exit;
|
| 501 |
|
|
}
|
| 502 |
|
|
}
|
| 503 |
|
|
break;
|
| 504 |
|
|
|
| 505 |
|
|
case AML_DEBUG_OP:
|
| 506 |
|
|
|
| 507 |
|
|
/* The Debug Object is of type "DebugObject" */
|
| 508 |
|
|
|
| 509 |
|
|
type = ACPI_TYPE_DEBUG_OBJECT;
|
| 510 |
|
|
goto exit;
|
| 511 |
|
|
|
| 512 |
|
|
default:
|
| 513 |
|
|
|
| 514 |
|
|
ACPI_ERROR((AE_INFO,
|
| 515 |
|
|
"Unknown Reference subtype %X",
|
| 516 |
|
|
obj_desc->reference.opcode));
|
| 517 |
|
|
return_ACPI_STATUS(AE_AML_INTERNAL);
|
| 518 |
|
|
}
|
| 519 |
|
|
}
|
| 520 |
|
|
|
| 521 |
|
|
/*
|
| 522 |
|
|
* Now we are guaranteed to have an object that has not been created
|
| 523 |
|
|
* via the ref_of or Index operators.
|
| 524 |
|
|
*/
|
| 525 |
|
|
type = ACPI_GET_OBJECT_TYPE(obj_desc);
|
| 526 |
|
|
|
| 527 |
|
|
exit:
|
| 528 |
|
|
/* Convert internal types to external types */
|
| 529 |
|
|
|
| 530 |
|
|
switch (type) {
|
| 531 |
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
| 532 |
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
| 533 |
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
| 534 |
|
|
|
| 535 |
|
|
type = ACPI_TYPE_FIELD_UNIT;
|
| 536 |
|
|
break;
|
| 537 |
|
|
|
| 538 |
|
|
case ACPI_TYPE_LOCAL_SCOPE:
|
| 539 |
|
|
|
| 540 |
|
|
/* Per ACPI Specification, Scope is untyped */
|
| 541 |
|
|
|
| 542 |
|
|
type = ACPI_TYPE_ANY;
|
| 543 |
|
|
break;
|
| 544 |
|
|
|
| 545 |
|
|
default:
|
| 546 |
|
|
/* No change to Type required */
|
| 547 |
|
|
break;
|
| 548 |
|
|
}
|
| 549 |
|
|
|
| 550 |
|
|
*return_type = type;
|
| 551 |
|
|
if (return_desc) {
|
| 552 |
|
|
*return_desc = obj_desc;
|
| 553 |
|
|
}
|
| 554 |
|
|
return_ACPI_STATUS(AE_OK);
|
| 555 |
|
|
}
|
