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![Bob Moore](/assets/img/avatar_default.png)
ACPICA commit 0c08790c56fdf0dc081ae869495a09d8c4230854 This change defers the resolution of package elements that are named references until after the entire namespace has been loaded from the definition block. This allows such references to be in fact forward references for both module level code and control methods. Link: https://github.com/acpica/acpica/commit/0c08790c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
588 lines
16 KiB
C
588 lines
16 KiB
C
/******************************************************************************
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*
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* Module Name: dsobject - Dispatcher object management routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2017, Intel Corp.
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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 "accommon.h"
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#include "acparser.h"
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#include "amlcode.h"
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#include "acdispat.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dsobject")
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#ifndef ACPI_NO_METHOD_EXECUTION
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_build_internal_object
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*
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* PARAMETERS: walk_state - Current walk state
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* op - Parser object to be translated
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* obj_desc_ptr - Where the ACPI internal object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Translate a parser Op object to the equivalent namespace object
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* Simple objects are any objects other than a package object!
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*
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******************************************************************************/
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acpi_status
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acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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union acpi_operand_object **obj_desc_ptr)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ds_build_internal_object);
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*obj_desc_ptr = NULL;
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if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
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/*
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* This is a named object reference. If this name was
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* previously looked up in the namespace, it was stored in
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* this op. Otherwise, go ahead and look it up now
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*/
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if (!op->common.node) {
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/* Check if we are resolving a named reference within a package */
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if ((op->common.parent->common.aml_opcode ==
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AML_PACKAGE_OP)
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|| (op->common.parent->common.aml_opcode ==
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AML_VARIABLE_PACKAGE_OP)) {
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/*
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* We won't resolve package elements here, we will do this
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* after all ACPI tables are loaded into the namespace. This
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* behavior supports both forward references to named objects
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* and external references to objects in other tables.
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*/
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goto create_new_object;
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} else {
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status = acpi_ns_lookup(walk_state->scope_info,
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op->common.value.string,
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ACPI_TYPE_ANY,
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ACPI_IMODE_EXECUTE,
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ACPI_NS_SEARCH_PARENT |
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ACPI_NS_DONT_OPEN_SCOPE,
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NULL,
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ACPI_CAST_INDIRECT_PTR
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(struct
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acpi_namespace_node,
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&(op->common.node)));
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR_NAMESPACE(op->common.value.
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string, 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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}
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create_new_object:
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/* Create and init a new internal ACPI object */
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obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
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(op->common.aml_opcode))->
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object_type);
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if (!obj_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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status =
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acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
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&obj_desc);
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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/*
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* Handling for unresolved package reference elements.
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* These are elements that are namepaths.
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*/
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if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
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(op->common.parent->common.aml_opcode == AML_VARIABLE_PACKAGE_OP)) {
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obj_desc->reference.resolved = TRUE;
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if ((op->common.aml_opcode == AML_INT_NAMEPATH_OP) &&
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!obj_desc->reference.node) {
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/*
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* Name was unresolved above.
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* Get the prefix node for later lookup
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*/
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obj_desc->reference.node =
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walk_state->scope_info->scope.node;
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obj_desc->reference.aml = op->common.aml;
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obj_desc->reference.resolved = FALSE;
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}
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}
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*obj_desc_ptr = obj_desc;
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_build_internal_buffer_obj
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*
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* PARAMETERS: walk_state - Current walk state
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* op - Parser object to be translated
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* buffer_length - Length of the buffer
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* obj_desc_ptr - Where the ACPI internal object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Translate a parser Op package object to the equivalent
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* namespace object
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*
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******************************************************************************/
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acpi_status
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acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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u32 buffer_length,
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union acpi_operand_object **obj_desc_ptr)
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{
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union acpi_parse_object *arg;
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union acpi_operand_object *obj_desc;
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union acpi_parse_object *byte_list;
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u32 byte_list_length = 0;
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ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);
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/*
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* If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
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* The buffer object already exists (from the NS node), otherwise it must
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* be created.
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*/
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obj_desc = *obj_desc_ptr;
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if (!obj_desc) {
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/* Create a new buffer object */
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
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*obj_desc_ptr = obj_desc;
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if (!obj_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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}
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/*
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* Second arg is the buffer data (optional) byte_list can be either
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* individual bytes or a string initializer. In either case, a
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* byte_list appears in the AML.
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*/
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arg = op->common.value.arg; /* skip first arg */
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byte_list = arg->named.next;
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if (byte_list) {
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if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
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ACPI_ERROR((AE_INFO,
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"Expecting bytelist, found AML opcode 0x%X in op %p",
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byte_list->common.aml_opcode, byte_list));
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acpi_ut_remove_reference(obj_desc);
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return (AE_TYPE);
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}
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byte_list_length = (u32) byte_list->common.value.integer;
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}
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/*
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* The buffer length (number of bytes) will be the larger of:
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* 1) The specified buffer length and
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* 2) The length of the initializer byte list
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*/
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obj_desc->buffer.length = buffer_length;
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if (byte_list_length > buffer_length) {
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obj_desc->buffer.length = byte_list_length;
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}
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/* Allocate the buffer */
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if (obj_desc->buffer.length == 0) {
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obj_desc->buffer.pointer = NULL;
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Buffer defined with zero length in AML, creating\n"));
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} else {
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obj_desc->buffer.pointer =
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ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
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if (!obj_desc->buffer.pointer) {
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acpi_ut_delete_object_desc(obj_desc);
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Initialize buffer from the byte_list (if present) */
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if (byte_list) {
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memcpy(obj_desc->buffer.pointer, byte_list->named.data,
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byte_list_length);
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}
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}
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obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
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op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
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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_ds_create_node
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*
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* PARAMETERS: walk_state - Current walk state
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* node - NS Node to be initialized
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* op - Parser object to be translated
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create the object to be associated with a namespace node
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*
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******************************************************************************/
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acpi_status
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acpi_ds_create_node(struct acpi_walk_state *walk_state,
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struct acpi_namespace_node *node,
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union acpi_parse_object *op)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);
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/*
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* Because of the execution pass through the non-control-method
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* parts of the table, we can arrive here twice. Only init
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* the named object node the first time through
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*/
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if (acpi_ns_get_attached_object(node)) {
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return_ACPI_STATUS(AE_OK);
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}
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if (!op->common.value.arg) {
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/* No arguments, there is nothing to do */
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return_ACPI_STATUS(AE_OK);
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}
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/* Build an internal object for the argument(s) */
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status =
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acpi_ds_build_internal_object(walk_state, op->common.value.arg,
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&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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/* Re-type the object according to its argument */
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node->type = obj_desc->common.type;
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/* Attach obj to node */
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status = acpi_ns_attach_object(node, obj_desc, node->type);
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/* Remove local reference to the object */
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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#endif /* ACPI_NO_METHOD_EXECUTION */
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_init_object_from_op
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*
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* PARAMETERS: walk_state - Current walk state
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* op - Parser op used to init the internal object
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* opcode - AML opcode associated with the object
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* ret_obj_desc - Namespace object to be initialized
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize a namespace object from a parser Op and its
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* associated arguments. The namespace object is a more compact
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* representation of the Op and its arguments.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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u16 opcode,
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union acpi_operand_object **ret_obj_desc)
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{
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const struct acpi_opcode_info *op_info;
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union acpi_operand_object *obj_desc;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(ds_init_object_from_op);
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obj_desc = *ret_obj_desc;
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op_info = acpi_ps_get_opcode_info(opcode);
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if (op_info->class == AML_CLASS_UNKNOWN) {
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/* Unknown opcode */
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return_ACPI_STATUS(AE_TYPE);
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}
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/* Perform per-object initialization */
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switch (obj_desc->common.type) {
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case ACPI_TYPE_BUFFER:
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/*
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* Defer evaluation of Buffer term_arg operand
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*/
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obj_desc->buffer.node =
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ACPI_CAST_PTR(struct acpi_namespace_node,
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walk_state->operands[0]);
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obj_desc->buffer.aml_start = op->named.data;
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obj_desc->buffer.aml_length = op->named.length;
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break;
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case ACPI_TYPE_PACKAGE:
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/*
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* Defer evaluation of Package term_arg operand and all
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* package elements. (01/2017): We defer the element
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* resolution to allow forward references from the package
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* in order to provide compatibility with other ACPI
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* implementations.
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*/
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obj_desc->package.node =
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ACPI_CAST_PTR(struct acpi_namespace_node,
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walk_state->operands[0]);
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if (!op->named.data) {
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return_ACPI_STATUS(AE_OK);
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}
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obj_desc->package.aml_start = op->named.data;
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obj_desc->package.aml_length = op->named.length;
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break;
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case ACPI_TYPE_INTEGER:
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switch (op_info->type) {
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case AML_TYPE_CONSTANT:
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/*
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* Resolve AML Constants here - AND ONLY HERE!
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* All constants are integers.
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* We mark the integer with a flag that indicates that it started
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* life as a constant -- so that stores to constants will perform
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* as expected (noop). zero_op is used as a placeholder for optional
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* target operands.
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*/
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obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
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switch (opcode) {
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case AML_ZERO_OP:
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obj_desc->integer.value = 0;
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break;
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case AML_ONE_OP:
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obj_desc->integer.value = 1;
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break;
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case AML_ONES_OP:
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obj_desc->integer.value = ACPI_UINT64_MAX;
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/* Truncate value if we are executing from a 32-bit ACPI table */
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#ifndef ACPI_NO_METHOD_EXECUTION
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(void)acpi_ex_truncate_for32bit_table(obj_desc);
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#endif
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break;
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case AML_REVISION_OP:
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obj_desc->integer.value = ACPI_CA_VERSION;
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"Unknown constant opcode 0x%X",
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opcode));
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status = AE_AML_OPERAND_TYPE;
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break;
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}
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break;
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case AML_TYPE_LITERAL:
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obj_desc->integer.value = op->common.value.integer;
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#ifndef ACPI_NO_METHOD_EXECUTION
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if (acpi_ex_truncate_for32bit_table(obj_desc)) {
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/* Warn if we found a 64-bit constant in a 32-bit table */
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ACPI_WARNING((AE_INFO,
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"Truncated 64-bit constant found in 32-bit table: %8.8X%8.8X => %8.8X",
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ACPI_FORMAT_UINT64(op->common.
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value.integer),
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(u32)obj_desc->integer.value));
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}
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#endif
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unknown Integer type 0x%X",
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op_info->type));
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status = AE_AML_OPERAND_TYPE;
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break;
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}
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break;
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case ACPI_TYPE_STRING:
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obj_desc->string.pointer = op->common.value.string;
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obj_desc->string.length = (u32)strlen(op->common.value.string);
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/*
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* The string is contained in the ACPI table, don't ever try
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* to delete it
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*/
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obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
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break;
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case ACPI_TYPE_METHOD:
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break;
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case ACPI_TYPE_LOCAL_REFERENCE:
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switch (op_info->type) {
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case AML_TYPE_LOCAL_VARIABLE:
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/* Local ID (0-7) is (AML opcode - base AML_FIRST_LOCAL_OP) */
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obj_desc->reference.value =
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((u32)opcode) - AML_FIRST_LOCAL_OP;
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obj_desc->reference.class = ACPI_REFCLASS_LOCAL;
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#ifndef ACPI_NO_METHOD_EXECUTION
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status =
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acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL,
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obj_desc->reference.
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value, walk_state,
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ACPI_CAST_INDIRECT_PTR
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(struct
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acpi_namespace_node,
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&obj_desc->reference.
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object));
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#endif
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break;
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case AML_TYPE_METHOD_ARGUMENT:
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/* Arg ID (0-6) is (AML opcode - base AML_FIRST_ARG_OP) */
|
|
|
|
obj_desc->reference.value =
|
|
((u32)opcode) - AML_FIRST_ARG_OP;
|
|
obj_desc->reference.class = ACPI_REFCLASS_ARG;
|
|
|
|
#ifndef ACPI_NO_METHOD_EXECUTION
|
|
status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG,
|
|
obj_desc->
|
|
reference.value,
|
|
walk_state,
|
|
ACPI_CAST_INDIRECT_PTR
|
|
(struct
|
|
acpi_namespace_node,
|
|
&obj_desc->
|
|
reference.
|
|
object));
|
|
#endif
|
|
break;
|
|
|
|
default: /* Object name or Debug object */
|
|
|
|
switch (op->common.aml_opcode) {
|
|
case AML_INT_NAMEPATH_OP:
|
|
|
|
/* Node was saved in Op */
|
|
|
|
obj_desc->reference.node = op->common.node;
|
|
obj_desc->reference.class = ACPI_REFCLASS_NAME;
|
|
if (op->common.node) {
|
|
obj_desc->reference.object =
|
|
op->common.node->object;
|
|
}
|
|
break;
|
|
|
|
case AML_DEBUG_OP:
|
|
|
|
obj_desc->reference.class = ACPI_REFCLASS_DEBUG;
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
"Unimplemented reference type for AML opcode: 0x%4.4X",
|
|
opcode));
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR((AE_INFO, "Unimplemented data type: 0x%X",
|
|
obj_desc->common.type));
|
|
|
|
status = AE_AML_OPERAND_TYPE;
|
|
break;
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|