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591 lines
18 KiB
C
591 lines
18 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 - 2020, 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.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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/*******************************************************************************
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*
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* FUNCTION: AcpiDsBuildInternalObject
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*
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* PARAMETERS: WalkState - Current walk state
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* Op - Parser object to be translated
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* ObjDescPtr - 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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AcpiDsBuildInternalObject (
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT *Op,
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ACPI_OPERAND_OBJECT **ObjDescPtr)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (DsBuildInternalObject);
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*ObjDescPtr = NULL;
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if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
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{
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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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{
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/* Check if we are resolving a named reference within a package */
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if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
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(Op->Common.Parent->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP))
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{
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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 CreateNewObject;
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}
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else
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{
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Status = AcpiNsLookup (WalkState->ScopeInfo,
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Op->Common.Value.String,
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ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
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ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL,
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ACPI_CAST_INDIRECT_PTR (
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ACPI_NAMESPACE_NODE, &(Op->Common.Node)));
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
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Op->Common.Value.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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CreateNewObject:
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/* Create and init a new internal ACPI object */
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ObjDesc = AcpiUtCreateInternalObject (
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(AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType);
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Status = AcpiDsInitObjectFromOp (
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WalkState, Op, Op->Common.AmlOpcode, &ObjDesc);
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if (ACPI_FAILURE (Status))
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{
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AcpiUtRemoveReference (ObjDesc);
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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.AmlOpcode == AML_PACKAGE_OP) ||
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(Op->Common.Parent->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP))
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{
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ObjDesc->Reference.Resolved = TRUE;
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if ((Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
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!ObjDesc->Reference.Node)
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{
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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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ObjDesc->Reference.Node = WalkState->ScopeInfo->Scope.Node;
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ObjDesc->Reference.Aml = Op->Common.Aml;
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ObjDesc->Reference.Resolved = FALSE;
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}
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}
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*ObjDescPtr = ObjDesc;
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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: AcpiDsBuildInternalBufferObj
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*
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* PARAMETERS: WalkState - Current walk state
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* Op - Parser object to be translated
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* BufferLength - Length of the buffer
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* ObjDescPtr - 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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AcpiDsBuildInternalBufferObj (
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT *Op,
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UINT32 BufferLength,
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ACPI_OPERAND_OBJECT **ObjDescPtr)
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{
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ACPI_PARSE_OBJECT *Arg;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_PARSE_OBJECT *ByteList;
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UINT32 ByteListLength = 0;
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ACPI_FUNCTION_TRACE (DsBuildInternalBufferObj);
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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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ObjDesc = *ObjDescPtr;
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if (!ObjDesc)
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{
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/* Create a new buffer object */
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
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*ObjDescPtr = ObjDesc;
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if (!ObjDesc)
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{
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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) ByteList can be either
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* individual bytes or a string initializer. In either case, a
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* ByteList appears in the AML.
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*/
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Arg = Op->Common.Value.Arg; /* skip first arg */
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ByteList = Arg->Named.Next;
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if (ByteList)
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{
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if (ByteList->Common.AmlOpcode != AML_INT_BYTELIST_OP)
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{
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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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ByteList->Common.AmlOpcode, ByteList));
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AcpiUtRemoveReference (ObjDesc);
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return (AE_TYPE);
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}
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ByteListLength = (UINT32) ByteList->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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ObjDesc->Buffer.Length = BufferLength;
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if (ByteListLength > BufferLength)
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{
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ObjDesc->Buffer.Length = ByteListLength;
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}
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/* Allocate the buffer */
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if (ObjDesc->Buffer.Length == 0)
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{
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ObjDesc->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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}
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else
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{
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ObjDesc->Buffer.Pointer =
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ACPI_ALLOCATE_ZEROED (ObjDesc->Buffer.Length);
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if (!ObjDesc->Buffer.Pointer)
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{
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AcpiUtDeleteObjectDesc (ObjDesc);
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Initialize buffer from the ByteList (if present) */
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if (ByteList)
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{
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memcpy (ObjDesc->Buffer.Pointer, ByteList->Named.Data,
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ByteListLength);
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}
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}
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ObjDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
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Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc);
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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: AcpiDsCreateNode
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*
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* PARAMETERS: WalkState - 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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AcpiDsCreateNode (
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *Node,
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ACPI_PARSE_OBJECT *Op)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_FUNCTION_TRACE_PTR (DsCreateNode, 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 (AcpiNsGetAttachedObject (Node))
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{
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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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{
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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 = AcpiDsBuildInternalObject (
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WalkState, Op->Common.Value.Arg, &ObjDesc);
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if (ACPI_FAILURE (Status))
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{
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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 = ObjDesc->Common.Type;
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/* Attach obj to node */
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Status = AcpiNsAttachObject (Node, ObjDesc, Node->Type);
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/* Remove local reference to the object */
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AcpiUtRemoveReference (ObjDesc);
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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: AcpiDsInitObjectFromOp
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*
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* PARAMETERS: WalkState - 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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* RetObjDesc - 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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AcpiDsInitObjectFromOp (
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT *Op,
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UINT16 Opcode,
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ACPI_OPERAND_OBJECT **RetObjDesc)
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{
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const ACPI_OPCODE_INFO *OpInfo;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (DsInitObjectFromOp);
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ObjDesc = *RetObjDesc;
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OpInfo = AcpiPsGetOpcodeInfo (Opcode);
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if (OpInfo->Class == AML_CLASS_UNKNOWN)
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{
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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 (ObjDesc->Common.Type)
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{
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case ACPI_TYPE_BUFFER:
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/*
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* Defer evaluation of Buffer TermArg operand
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*/
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ObjDesc->Buffer.Node = ACPI_CAST_PTR (
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ACPI_NAMESPACE_NODE, WalkState->Operands[0]);
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ObjDesc->Buffer.AmlStart = Op->Named.Data;
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ObjDesc->Buffer.AmlLength = 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 TermArg 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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ObjDesc->Package.Node = ACPI_CAST_PTR (
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ACPI_NAMESPACE_NODE, WalkState->Operands[0]);
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if (!Op->Named.Data)
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{
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return_ACPI_STATUS (AE_OK);
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}
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ObjDesc->Package.AmlStart = Op->Named.Data;
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ObjDesc->Package.AmlLength = Op->Named.Length;
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break;
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case ACPI_TYPE_INTEGER:
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switch (OpInfo->Type)
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{
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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). ZeroOp is used as a placeholder for optional
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* target operands.
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*/
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ObjDesc->Common.Flags = AOPOBJ_AML_CONSTANT;
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switch (Opcode)
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{
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case AML_ZERO_OP:
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ObjDesc->Integer.Value = 0;
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break;
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case AML_ONE_OP:
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ObjDesc->Integer.Value = 1;
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break;
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case AML_ONES_OP:
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ObjDesc->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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(void) AcpiExTruncateFor32bitTable (ObjDesc);
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break;
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case AML_REVISION_OP:
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ObjDesc->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", 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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ObjDesc->Integer.Value = Op->Common.Value.Integer;
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if (AcpiExTruncateFor32bitTable (ObjDesc))
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{
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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.Value.Integer),
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(UINT32) ObjDesc->Integer.Value));
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}
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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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OpInfo->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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ObjDesc->String.Pointer = Op->Common.Value.String;
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ObjDesc->String.Length = (UINT32) 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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ObjDesc->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 (OpInfo->Type)
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{
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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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ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_FIRST_LOCAL_OP;
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ObjDesc->Reference.Class = ACPI_REFCLASS_LOCAL;
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Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_LOCAL,
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ObjDesc->Reference.Value, WalkState,
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ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE,
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&ObjDesc->Reference.Object));
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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) */
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ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_FIRST_ARG_OP;
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ObjDesc->Reference.Class = ACPI_REFCLASS_ARG;
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Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_ARG,
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ObjDesc->Reference.Value, WalkState,
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ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE,
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&ObjDesc->Reference.Object));
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break;
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default: /* Object name or Debug object */
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switch (Op->Common.AmlOpcode)
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{
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case AML_INT_NAMEPATH_OP:
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/* Node was saved in Op */
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ObjDesc->Reference.Node = Op->Common.Node;
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ObjDesc->Reference.Class = ACPI_REFCLASS_NAME;
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if (Op->Common.Node)
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{
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ObjDesc->Reference.Object = Op->Common.Node->Object;
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}
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break;
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case AML_DEBUG_OP:
|
|
|
|
ObjDesc->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",
|
|
ObjDesc->Common.Type));
|
|
|
|
Status = AE_AML_OPERAND_TYPE;
|
|
break;
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|