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1275 |
phoenix |
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/******************************************************************************
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*
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* Module Name: exresolv - AML Interpreter object resolution
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2004, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/amlcode.h>
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#include <acpi/acdispat.h>
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#include <acpi/acinterp.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acparser.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exresolv")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_resolve_to_value
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*
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* PARAMETERS: **stack_ptr - Points to entry on obj_stack, which can
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* be either an (union acpi_operand_object *)
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* or an acpi_handle.
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* walk_state - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert Reference objects to values
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*
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******************************************************************************/
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acpi_status
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acpi_ex_resolve_to_value (
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union acpi_operand_object **stack_ptr,
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struct acpi_walk_state *walk_state)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE_PTR ("ex_resolve_to_value", stack_ptr);
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if (!stack_ptr || !*stack_ptr) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n"));
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/*
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* The entity pointed to by the stack_ptr can be either
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* 1) A valid union acpi_operand_object, or
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* 2) A struct acpi_namespace_node (named_obj)
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE (*stack_ptr) == ACPI_DESC_TYPE_OPERAND) {
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status = acpi_ex_resolve_object_to_value (stack_ptr, walk_state);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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}
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/*
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* Object on the stack may have changed if acpi_ex_resolve_object_to_value()
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* was called (i.e., we can't use an _else_ here.)
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE (*stack_ptr) == ACPI_DESC_TYPE_NAMED) {
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status = acpi_ex_resolve_node_to_value (
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ACPI_CAST_INDIRECT_PTR (struct acpi_namespace_node, stack_ptr),
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walk_state);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *stack_ptr));
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_resolve_object_to_value
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*
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* PARAMETERS: stack_ptr - Pointer to a stack location that contains a
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* ptr to an internal object.
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* walk_state - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Retrieve the value from an internal object. The Reference type
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* uses the associated AML opcode to determine the value.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_resolve_object_to_value (
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union acpi_operand_object **stack_ptr,
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struct acpi_walk_state *walk_state)
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{
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acpi_status status = AE_OK;
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union acpi_operand_object *stack_desc;
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void *temp_node;
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union acpi_operand_object *obj_desc;
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u16 opcode;
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ACPI_FUNCTION_TRACE ("ex_resolve_object_to_value");
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| 148 |
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stack_desc = *stack_ptr;
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/* This is an union acpi_operand_object */
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switch (ACPI_GET_OBJECT_TYPE (stack_desc)) {
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case ACPI_TYPE_LOCAL_REFERENCE:
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opcode = stack_desc->reference.opcode;
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switch (opcode) {
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case AML_NAME_OP:
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/*
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* Convert indirect name ptr to a direct name ptr.
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* Then, acpi_ex_resolve_node_to_value can be used to get the value
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*/
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temp_node = stack_desc->reference.object;
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/* Delete the Reference Object */
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acpi_ut_remove_reference (stack_desc);
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/* Put direct name pointer onto stack and exit */
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(*stack_ptr) = temp_node;
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break;
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case AML_LOCAL_OP:
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case AML_ARG_OP:
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/*
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* Get the local from the method's state info
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* Note: this increments the local's object reference count
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*/
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status = acpi_ds_method_data_get_value (opcode,
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stack_desc->reference.offset, walk_state, &obj_desc);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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| 189 |
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/*
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| 191 |
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* Now we can delete the original Reference Object and
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* replace it with the resolve value
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*/
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acpi_ut_remove_reference (stack_desc);
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*stack_ptr = obj_desc;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %d] value_obj is %p\n",
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stack_desc->reference.offset, obj_desc));
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break;
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| 200 |
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| 201 |
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| 202 |
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case AML_INDEX_OP:
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| 203 |
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| 204 |
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switch (stack_desc->reference.target_type) {
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case ACPI_TYPE_BUFFER_FIELD:
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| 207 |
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/* Just return - leave the Reference on the stack */
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| 208 |
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break;
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| 209 |
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| 210 |
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| 211 |
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case ACPI_TYPE_PACKAGE:
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| 212 |
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| 213 |
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obj_desc = *stack_desc->reference.where;
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if (obj_desc) {
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| 215 |
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/*
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| 216 |
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* Valid obj descriptor, copy pointer to return value
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| 217 |
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* (i.e., dereference the package index)
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| 218 |
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* Delete the ref object, increment the returned object
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| 219 |
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*/
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| 220 |
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acpi_ut_remove_reference (stack_desc);
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| 221 |
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acpi_ut_add_reference (obj_desc);
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| 222 |
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*stack_ptr = obj_desc;
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| 223 |
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}
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| 224 |
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else {
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| 225 |
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/*
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| 226 |
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* A NULL object descriptor means an unitialized element of
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| 227 |
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* the package, can't dereference it
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| 228 |
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*/
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| 229 |
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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| 230 |
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"Attempt to deref an Index to NULL pkg element Idx=%p\n",
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| 231 |
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stack_desc));
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| 232 |
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status = AE_AML_UNINITIALIZED_ELEMENT;
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| 233 |
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}
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| 234 |
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break;
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| 235 |
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| 236 |
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| 237 |
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default:
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| 238 |
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| 239 |
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/* Invalid reference object */
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| 240 |
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| 241 |
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ACPI_REPORT_ERROR ((
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| 242 |
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"During resolve, Unknown target_type %X in Index/Reference obj %p\n",
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| 243 |
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stack_desc->reference.target_type, stack_desc));
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| 244 |
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status = AE_AML_INTERNAL;
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| 245 |
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break;
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| 246 |
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}
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| 247 |
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break;
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| 248 |
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| 249 |
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| 250 |
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case AML_REF_OF_OP:
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| 251 |
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case AML_DEBUG_OP:
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| 252 |
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case AML_LOAD_OP:
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| 253 |
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| 254 |
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/* Just leave the object as-is */
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| 255 |
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| 256 |
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break;
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| 257 |
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| 258 |
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| 259 |
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default:
|
| 260 |
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|
| 261 |
|
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ACPI_REPORT_ERROR (("During resolve, Unknown Reference opcode %X (%s) in %p\n",
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| 262 |
|
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opcode, acpi_ps_get_opcode_name (opcode), stack_desc));
|
| 263 |
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status = AE_AML_INTERNAL;
|
| 264 |
|
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break;
|
| 265 |
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}
|
| 266 |
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break;
|
| 267 |
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|
| 268 |
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|
| 269 |
|
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case ACPI_TYPE_BUFFER:
|
| 270 |
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|
| 271 |
|
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status = acpi_ds_get_buffer_arguments (stack_desc);
|
| 272 |
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break;
|
| 273 |
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|
| 274 |
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|
| 275 |
|
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case ACPI_TYPE_PACKAGE:
|
| 276 |
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|
| 277 |
|
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status = acpi_ds_get_package_arguments (stack_desc);
|
| 278 |
|
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break;
|
| 279 |
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|
| 280 |
|
|
|
| 281 |
|
|
/*
|
| 282 |
|
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* These cases may never happen here, but just in case..
|
| 283 |
|
|
*/
|
| 284 |
|
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case ACPI_TYPE_BUFFER_FIELD:
|
| 285 |
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
| 286 |
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
| 287 |
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
| 288 |
|
|
|
| 289 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "field_read source_desc=%p Type=%X\n",
|
| 290 |
|
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stack_desc, ACPI_GET_OBJECT_TYPE (stack_desc)));
|
| 291 |
|
|
|
| 292 |
|
|
status = acpi_ex_read_data_from_field (walk_state, stack_desc, &obj_desc);
|
| 293 |
|
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*stack_ptr = (void *) obj_desc;
|
| 294 |
|
|
break;
|
| 295 |
|
|
|
| 296 |
|
|
default:
|
| 297 |
|
|
break;
|
| 298 |
|
|
}
|
| 299 |
|
|
|
| 300 |
|
|
return_ACPI_STATUS (status);
|
| 301 |
|
|
}
|
| 302 |
|
|
|
| 303 |
|
|
|
| 304 |
|
|
/*******************************************************************************
|
| 305 |
|
|
*
|
| 306 |
|
|
* FUNCTION: acpi_ex_resolve_multiple
|
| 307 |
|
|
*
|
| 308 |
|
|
* PARAMETERS: walk_state - Current state (contains AML opcode)
|
| 309 |
|
|
* Operand - Starting point for resolution
|
| 310 |
|
|
* return_type - Where the object type is returned
|
| 311 |
|
|
* return_desc - Where the resolved object is returned
|
| 312 |
|
|
*
|
| 313 |
|
|
* RETURN: Status
|
| 314 |
|
|
*
|
| 315 |
|
|
* DESCRIPTION: Return the base object and type. Traverse a reference list if
|
| 316 |
|
|
* necessary to get to the base object.
|
| 317 |
|
|
*
|
| 318 |
|
|
******************************************************************************/
|
| 319 |
|
|
|
| 320 |
|
|
acpi_status
|
| 321 |
|
|
acpi_ex_resolve_multiple (
|
| 322 |
|
|
struct acpi_walk_state *walk_state,
|
| 323 |
|
|
union acpi_operand_object *operand,
|
| 324 |
|
|
acpi_object_type *return_type,
|
| 325 |
|
|
union acpi_operand_object **return_desc)
|
| 326 |
|
|
{
|
| 327 |
|
|
union acpi_operand_object *obj_desc = (void *) operand;
|
| 328 |
|
|
struct acpi_namespace_node *node;
|
| 329 |
|
|
acpi_object_type type;
|
| 330 |
|
|
|
| 331 |
|
|
|
| 332 |
|
|
ACPI_FUNCTION_TRACE ("acpi_ex_resolve_multiple");
|
| 333 |
|
|
|
| 334 |
|
|
|
| 335 |
|
|
/*
|
| 336 |
|
|
* For reference objects created via the ref_of or Index operators,
|
| 337 |
|
|
* we need to get to the base object (as per the ACPI specification
|
| 338 |
|
|
* of the object_type and size_of operators). This means traversing
|
| 339 |
|
|
* the list of possibly many nested references.
|
| 340 |
|
|
*/
|
| 341 |
|
|
while (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_REFERENCE) {
|
| 342 |
|
|
switch (obj_desc->reference.opcode) {
|
| 343 |
|
|
case AML_REF_OF_OP:
|
| 344 |
|
|
|
| 345 |
|
|
/* Dereference the reference pointer */
|
| 346 |
|
|
|
| 347 |
|
|
node = obj_desc->reference.object;
|
| 348 |
|
|
|
| 349 |
|
|
/* All "References" point to a NS node */
|
| 350 |
|
|
|
| 351 |
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (node) != ACPI_DESC_TYPE_NAMED) {
|
| 352 |
|
|
ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Not a NS node %p [%s]\n",
|
| 353 |
|
|
node, acpi_ut_get_descriptor_name (node)));
|
| 354 |
|
|
return_ACPI_STATUS (AE_AML_INTERNAL);
|
| 355 |
|
|
}
|
| 356 |
|
|
|
| 357 |
|
|
/* Get the attached object */
|
| 358 |
|
|
|
| 359 |
|
|
obj_desc = acpi_ns_get_attached_object (node);
|
| 360 |
|
|
if (!obj_desc) {
|
| 361 |
|
|
/* No object, use the NS node type */
|
| 362 |
|
|
|
| 363 |
|
|
type = acpi_ns_get_type (node);
|
| 364 |
|
|
goto exit;
|
| 365 |
|
|
}
|
| 366 |
|
|
|
| 367 |
|
|
/* Check for circular references */
|
| 368 |
|
|
|
| 369 |
|
|
if (obj_desc == operand) {
|
| 370 |
|
|
return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
|
| 371 |
|
|
}
|
| 372 |
|
|
break;
|
| 373 |
|
|
|
| 374 |
|
|
|
| 375 |
|
|
case AML_INDEX_OP:
|
| 376 |
|
|
|
| 377 |
|
|
/* Get the type of this reference (index into another object) */
|
| 378 |
|
|
|
| 379 |
|
|
type = obj_desc->reference.target_type;
|
| 380 |
|
|
if (type != ACPI_TYPE_PACKAGE) {
|
| 381 |
|
|
goto exit;
|
| 382 |
|
|
}
|
| 383 |
|
|
|
| 384 |
|
|
/*
|
| 385 |
|
|
* The main object is a package, we want to get the type
|
| 386 |
|
|
* of the individual package element that is referenced by
|
| 387 |
|
|
* the index.
|
| 388 |
|
|
*
|
| 389 |
|
|
* This could of course in turn be another reference object.
|
| 390 |
|
|
*/
|
| 391 |
|
|
obj_desc = *(obj_desc->reference.where);
|
| 392 |
|
|
break;
|
| 393 |
|
|
|
| 394 |
|
|
|
| 395 |
|
|
case AML_INT_NAMEPATH_OP:
|
| 396 |
|
|
|
| 397 |
|
|
/* Dereference the reference pointer */
|
| 398 |
|
|
|
| 399 |
|
|
node = obj_desc->reference.node;
|
| 400 |
|
|
|
| 401 |
|
|
/* All "References" point to a NS node */
|
| 402 |
|
|
|
| 403 |
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (node) != ACPI_DESC_TYPE_NAMED) {
|
| 404 |
|
|
ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Not a NS node %p [%s]\n",
|
| 405 |
|
|
node, acpi_ut_get_descriptor_name (node)));
|
| 406 |
|
|
return_ACPI_STATUS (AE_AML_INTERNAL);
|
| 407 |
|
|
}
|
| 408 |
|
|
|
| 409 |
|
|
/* Get the attached object */
|
| 410 |
|
|
|
| 411 |
|
|
obj_desc = acpi_ns_get_attached_object (node);
|
| 412 |
|
|
if (!obj_desc) {
|
| 413 |
|
|
/* No object, use the NS node type */
|
| 414 |
|
|
|
| 415 |
|
|
type = acpi_ns_get_type (node);
|
| 416 |
|
|
goto exit;
|
| 417 |
|
|
}
|
| 418 |
|
|
|
| 419 |
|
|
/* Check for circular references */
|
| 420 |
|
|
|
| 421 |
|
|
if (obj_desc == operand) {
|
| 422 |
|
|
return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
|
| 423 |
|
|
}
|
| 424 |
|
|
break;
|
| 425 |
|
|
|
| 426 |
|
|
|
| 427 |
|
|
case AML_DEBUG_OP:
|
| 428 |
|
|
|
| 429 |
|
|
/* The Debug Object is of type "debug_object" */
|
| 430 |
|
|
|
| 431 |
|
|
type = ACPI_TYPE_DEBUG_OBJECT;
|
| 432 |
|
|
goto exit;
|
| 433 |
|
|
|
| 434 |
|
|
|
| 435 |
|
|
default:
|
| 436 |
|
|
|
| 437 |
|
|
ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Unknown Reference subtype %X\n",
|
| 438 |
|
|
obj_desc->reference.opcode));
|
| 439 |
|
|
return_ACPI_STATUS (AE_AML_INTERNAL);
|
| 440 |
|
|
}
|
| 441 |
|
|
}
|
| 442 |
|
|
|
| 443 |
|
|
/*
|
| 444 |
|
|
* Now we are guaranteed to have an object that has not been created
|
| 445 |
|
|
* via the ref_of or Index operators.
|
| 446 |
|
|
*/
|
| 447 |
|
|
type = ACPI_GET_OBJECT_TYPE (obj_desc);
|
| 448 |
|
|
|
| 449 |
|
|
|
| 450 |
|
|
exit:
|
| 451 |
|
|
/* Convert internal types to external types */
|
| 452 |
|
|
|
| 453 |
|
|
switch (type) {
|
| 454 |
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
| 455 |
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
| 456 |
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
| 457 |
|
|
|
| 458 |
|
|
type = ACPI_TYPE_FIELD_UNIT;
|
| 459 |
|
|
break;
|
| 460 |
|
|
|
| 461 |
|
|
case ACPI_TYPE_LOCAL_SCOPE:
|
| 462 |
|
|
|
| 463 |
|
|
/* Per ACPI Specification, Scope is untyped */
|
| 464 |
|
|
|
| 465 |
|
|
type = ACPI_TYPE_ANY;
|
| 466 |
|
|
break;
|
| 467 |
|
|
|
| 468 |
|
|
default:
|
| 469 |
|
|
/* No change to Type required */
|
| 470 |
|
|
break;
|
| 471 |
|
|
}
|
| 472 |
|
|
|
| 473 |
|
|
*return_type = type;
|
| 474 |
|
|
if (return_desc) {
|
| 475 |
|
|
*return_desc = obj_desc;
|
| 476 |
|
|
}
|
| 477 |
|
|
return_ACPI_STATUS (AE_OK);
|
| 478 |
|
|
}
|
| 479 |
|
|
|
| 480 |
|
|
|
