779 lines
22 KiB
C
779 lines
22 KiB
C
/******************************************************************************
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*
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* Module Name: utobject - ACPI object create/delete/size/cache routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, 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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#define __UTOBJECT_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME ("utobject")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiUtGetSimpleObjectSize (
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ACPI_OPERAND_OBJECT *Obj,
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ACPI_SIZE *ObjLength);
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static ACPI_STATUS
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AcpiUtGetPackageObjectSize (
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ACPI_OPERAND_OBJECT *Obj,
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ACPI_SIZE *ObjLength);
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static ACPI_STATUS
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AcpiUtGetElementLength (
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UINT8 ObjectType,
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ACPI_OPERAND_OBJECT *SourceObject,
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ACPI_GENERIC_STATE *State,
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void *Context);
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtCreateInternalObjectDbg
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*
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* PARAMETERS: ModuleName - Source file name of caller
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* LineNumber - Line number of caller
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* ComponentId - Component type of caller
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* Type - ACPI Type of the new object
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*
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* RETURN: A new internal object, null on failure
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*
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* DESCRIPTION: Create and initialize a new internal object.
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*
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* NOTE: We always allocate the worst-case object descriptor because
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* these objects are cached, and we want them to be
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* one-size-satisifies-any-request. This in itself may not be
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* the most memory efficient, but the efficiency of the object
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* cache should more than make up for this!
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*
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******************************************************************************/
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ACPI_OPERAND_OBJECT *
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AcpiUtCreateInternalObjectDbg (
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const char *ModuleName,
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UINT32 LineNumber,
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UINT32 ComponentId,
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ACPI_OBJECT_TYPE Type)
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{
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ACPI_OPERAND_OBJECT *Object;
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ACPI_OPERAND_OBJECT *SecondObject;
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ACPI_FUNCTION_TRACE_STR (UtCreateInternalObjectDbg,
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AcpiUtGetTypeName (Type));
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/* Allocate the raw object descriptor */
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Object = AcpiUtAllocateObjectDescDbg (ModuleName, LineNumber, ComponentId);
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if (!Object)
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{
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return_PTR (NULL);
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}
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switch (Type)
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{
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case ACPI_TYPE_REGION:
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case ACPI_TYPE_BUFFER_FIELD:
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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/* These types require a secondary object */
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SecondObject = AcpiUtAllocateObjectDescDbg (ModuleName,
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LineNumber, ComponentId);
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if (!SecondObject)
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{
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AcpiUtDeleteObjectDesc (Object);
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return_PTR (NULL);
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}
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SecondObject->Common.Type = ACPI_TYPE_LOCAL_EXTRA;
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SecondObject->Common.ReferenceCount = 1;
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/* Link the second object to the first */
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Object->Common.NextObject = SecondObject;
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break;
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default:
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/* All others have no secondary object */
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break;
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}
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/* Save the object type in the object descriptor */
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Object->Common.Type = (UINT8) Type;
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/* Init the reference count */
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Object->Common.ReferenceCount = 1;
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/* Any per-type initialization should go here */
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return_PTR (Object);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtCreatePackageObject
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*
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* PARAMETERS: Count - Number of package elements
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*
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* RETURN: Pointer to a new Package object, null on failure
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*
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* DESCRIPTION: Create a fully initialized package object
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*
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******************************************************************************/
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ACPI_OPERAND_OBJECT *
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AcpiUtCreatePackageObject (
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UINT32 Count)
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{
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ACPI_OPERAND_OBJECT *PackageDesc;
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ACPI_OPERAND_OBJECT **PackageElements;
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ACPI_FUNCTION_TRACE_U32 (UtCreatePackageObject, Count);
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/* Create a new Package object */
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PackageDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
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if (!PackageDesc)
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{
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return_PTR (NULL);
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}
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/*
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* Create the element array. Count+1 allows the array to be null
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* terminated.
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*/
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PackageElements = ACPI_ALLOCATE_ZEROED (
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((ACPI_SIZE) Count + 1) * sizeof (void *));
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if (!PackageElements)
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{
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ACPI_FREE (PackageDesc);
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return_PTR (NULL);
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}
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PackageDesc->Package.Count = Count;
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PackageDesc->Package.Elements = PackageElements;
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return_PTR (PackageDesc);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtCreateIntegerObject
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*
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* PARAMETERS: InitialValue - Initial value for the integer
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*
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* RETURN: Pointer to a new Integer object, null on failure
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*
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* DESCRIPTION: Create an initialized integer object
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*
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******************************************************************************/
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ACPI_OPERAND_OBJECT *
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AcpiUtCreateIntegerObject (
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UINT64 InitialValue)
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{
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ACPI_OPERAND_OBJECT *IntegerDesc;
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ACPI_FUNCTION_TRACE (UtCreateIntegerObject);
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/* Create and initialize a new integer object */
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IntegerDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
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if (!IntegerDesc)
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{
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return_PTR (NULL);
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}
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IntegerDesc->Integer.Value = InitialValue;
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return_PTR (IntegerDesc);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtCreateBufferObject
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*
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* PARAMETERS: BufferSize - Size of buffer to be created
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*
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* RETURN: Pointer to a new Buffer object, null on failure
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*
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* DESCRIPTION: Create a fully initialized buffer object
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*
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******************************************************************************/
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ACPI_OPERAND_OBJECT *
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AcpiUtCreateBufferObject (
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ACPI_SIZE BufferSize)
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{
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ACPI_OPERAND_OBJECT *BufferDesc;
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UINT8 *Buffer = NULL;
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ACPI_FUNCTION_TRACE_U32 (UtCreateBufferObject, BufferSize);
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/* Create a new Buffer object */
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BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
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if (!BufferDesc)
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{
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return_PTR (NULL);
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}
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/* Create an actual buffer only if size > 0 */
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if (BufferSize > 0)
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{
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/* Allocate the actual buffer */
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Buffer = ACPI_ALLOCATE_ZEROED (BufferSize);
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if (!Buffer)
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{
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ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
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(UINT32) BufferSize));
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AcpiUtRemoveReference (BufferDesc);
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return_PTR (NULL);
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}
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}
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/* Complete buffer object initialization */
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BufferDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
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BufferDesc->Buffer.Pointer = Buffer;
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BufferDesc->Buffer.Length = (UINT32) BufferSize;
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/* Return the new buffer descriptor */
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return_PTR (BufferDesc);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtCreateStringObject
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*
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* PARAMETERS: StringSize - Size of string to be created. Does not
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* include NULL terminator, this is added
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* automatically.
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*
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* RETURN: Pointer to a new String object
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*
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* DESCRIPTION: Create a fully initialized string object
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*
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******************************************************************************/
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ACPI_OPERAND_OBJECT *
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AcpiUtCreateStringObject (
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ACPI_SIZE StringSize)
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{
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ACPI_OPERAND_OBJECT *StringDesc;
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char *String;
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ACPI_FUNCTION_TRACE_U32 (UtCreateStringObject, StringSize);
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/* Create a new String object */
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StringDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
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if (!StringDesc)
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{
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return_PTR (NULL);
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}
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/*
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* Allocate the actual string buffer -- (Size + 1) for NULL terminator.
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* NOTE: Zero-length strings are NULL terminated
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*/
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String = ACPI_ALLOCATE_ZEROED (StringSize + 1);
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if (!String)
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{
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ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
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(UINT32) StringSize));
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AcpiUtRemoveReference (StringDesc);
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return_PTR (NULL);
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}
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/* Complete string object initialization */
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StringDesc->String.Pointer = String;
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StringDesc->String.Length = (UINT32) StringSize;
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/* Return the new string descriptor */
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return_PTR (StringDesc);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtValidInternalObject
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*
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* PARAMETERS: Object - Object to be validated
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*
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* RETURN: TRUE if object is valid, FALSE otherwise
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*
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* DESCRIPTION: Validate a pointer to be of type ACPI_OPERAND_OBJECT
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*
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******************************************************************************/
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BOOLEAN
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AcpiUtValidInternalObject (
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void *Object)
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{
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ACPI_FUNCTION_NAME (UtValidInternalObject);
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/* Check for a null pointer */
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if (!Object)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "**** Null Object Ptr\n"));
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return (FALSE);
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}
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/* Check the descriptor type field */
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switch (ACPI_GET_DESCRIPTOR_TYPE (Object))
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{
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case ACPI_DESC_TYPE_OPERAND:
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/* The object appears to be a valid ACPI_OPERAND_OBJECT */
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return (TRUE);
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"%p is not not an ACPI operand obj [%s]\n",
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Object, AcpiUtGetDescriptorName (Object)));
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break;
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtAllocateObjectDescDbg
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*
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* PARAMETERS: ModuleName - Caller's module name (for error output)
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* LineNumber - Caller's line number (for error output)
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* ComponentId - Caller's component ID (for error output)
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*
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* RETURN: Pointer to newly allocated object descriptor. Null on error
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*
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* DESCRIPTION: Allocate a new object descriptor. Gracefully handle
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* error conditions.
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*
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******************************************************************************/
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void *
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AcpiUtAllocateObjectDescDbg (
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const char *ModuleName,
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UINT32 LineNumber,
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UINT32 ComponentId)
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{
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ACPI_OPERAND_OBJECT *Object;
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ACPI_FUNCTION_TRACE (UtAllocateObjectDescDbg);
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Object = AcpiOsAcquireObject (AcpiGbl_OperandCache);
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if (!Object)
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{
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ACPI_ERROR ((ModuleName, LineNumber,
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"Could not allocate an object descriptor"));
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return_PTR (NULL);
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}
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/* Mark the descriptor type */
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ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_OPERAND);
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
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Object, (UINT32) sizeof (ACPI_OPERAND_OBJECT)));
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return_PTR (Object);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtDeleteObjectDesc
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*
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* PARAMETERS: Object - An Acpi internal object to be deleted
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*
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* RETURN: None.
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*
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* DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
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*
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******************************************************************************/
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void
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AcpiUtDeleteObjectDesc (
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ACPI_OPERAND_OBJECT *Object)
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{
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ACPI_FUNCTION_TRACE_PTR (UtDeleteObjectDesc, Object);
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/* Object must be of type ACPI_OPERAND_OBJECT */
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if (ACPI_GET_DESCRIPTOR_TYPE (Object) != ACPI_DESC_TYPE_OPERAND)
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{
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ACPI_ERROR ((AE_INFO,
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"%p is not an ACPI Operand object [%s]", Object,
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AcpiUtGetDescriptorName (Object)));
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return_VOID;
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}
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(void) AcpiOsReleaseObject (AcpiGbl_OperandCache, Object);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtGetSimpleObjectSize
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*
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* PARAMETERS: InternalObject - An ACPI operand object
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* ObjLength - Where the length is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to determine the space required to
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* contain a simple object for return to an external user.
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*
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* The length includes the object structure plus any additional
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* needed space.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiUtGetSimpleObjectSize (
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ACPI_OPERAND_OBJECT *InternalObject,
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ACPI_SIZE *ObjLength)
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{
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ACPI_SIZE Length;
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ACPI_SIZE Size;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE_PTR (UtGetSimpleObjectSize, InternalObject);
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/* Start with the length of the (external) Acpi object */
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Length = sizeof (ACPI_OBJECT);
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/* A NULL object is allowed, can be a legal uninitialized package element */
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if (!InternalObject)
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{
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/*
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* Object is NULL, just return the length of ACPI_OBJECT
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* (A NULL ACPI_OBJECT is an object of all zeroes.)
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*/
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*ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
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return_ACPI_STATUS (AE_OK);
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}
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/* A Namespace Node should never appear here */
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if (ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_NAMED)
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{
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/* A namespace node should never get here */
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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/*
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* The final length depends on the object type
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* Strings and Buffers are packed right up against the parent object and
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* must be accessed bytewise or there may be alignment problems on
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* certain processors
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*/
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switch (InternalObject->Common.Type)
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{
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case ACPI_TYPE_STRING:
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Length += (ACPI_SIZE) InternalObject->String.Length + 1;
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break;
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case ACPI_TYPE_BUFFER:
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Length += (ACPI_SIZE) InternalObject->Buffer.Length;
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break;
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_POWER:
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/* No extra data for these types */
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break;
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case ACPI_TYPE_LOCAL_REFERENCE:
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switch (InternalObject->Reference.Class)
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{
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case ACPI_REFCLASS_NAME:
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/*
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* Get the actual length of the full pathname to this object.
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* The reference will be converted to the pathname to the object
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*/
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Size = AcpiNsGetPathnameLength (InternalObject->Reference.Node);
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if (!Size)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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Length += ACPI_ROUND_UP_TO_NATIVE_WORD (Size);
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break;
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default:
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/*
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* No other reference opcodes are supported.
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* Notably, Locals and Args are not supported, but this may be
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* required eventually.
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*/
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ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
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"unsupported Reference Class [%s] 0x%X in object %p",
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AcpiUtGetReferenceName (InternalObject),
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InternalObject->Reference.Class, InternalObject));
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Status = AE_TYPE;
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break;
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}
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
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"unsupported type [%s] 0x%X in object %p",
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AcpiUtGetObjectTypeName (InternalObject),
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InternalObject->Common.Type, InternalObject));
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Status = AE_TYPE;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Account for the space required by the object rounded up to the next
|
|
* multiple of the machine word size. This keeps each object aligned
|
|
* on a machine word boundary. (preventing alignment faults on some
|
|
* machines.)
|
|
*/
|
|
*ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtGetElementLength
|
|
*
|
|
* PARAMETERS: ACPI_PKG_CALLBACK
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get the length of one package element.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiUtGetElementLength (
|
|
UINT8 ObjectType,
|
|
ACPI_OPERAND_OBJECT *SourceObject,
|
|
ACPI_GENERIC_STATE *State,
|
|
void *Context)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_PKG_INFO *Info = (ACPI_PKG_INFO *) Context;
|
|
ACPI_SIZE ObjectSpace;
|
|
|
|
|
|
switch (ObjectType)
|
|
{
|
|
case ACPI_COPY_TYPE_SIMPLE:
|
|
/*
|
|
* Simple object - just get the size (Null object/entry is handled
|
|
* here also) and sum it into the running package length
|
|
*/
|
|
Status = AcpiUtGetSimpleObjectSize (SourceObject, &ObjectSpace);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
Info->Length += ObjectSpace;
|
|
break;
|
|
|
|
case ACPI_COPY_TYPE_PACKAGE:
|
|
|
|
/* Package object - nothing much to do here, let the walk handle it */
|
|
|
|
Info->NumPackages++;
|
|
State->Pkg.ThisTargetObj = NULL;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* No other types allowed */
|
|
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtGetPackageObjectSize
|
|
*
|
|
* PARAMETERS: InternalObject - An ACPI internal object
|
|
* ObjLength - Where the length is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to determine the space required to
|
|
* contain a package object for return to an external user.
|
|
*
|
|
* This is moderately complex since a package contains other
|
|
* objects including packages.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiUtGetPackageObjectSize (
|
|
ACPI_OPERAND_OBJECT *InternalObject,
|
|
ACPI_SIZE *ObjLength)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_PKG_INFO Info;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (UtGetPackageObjectSize, InternalObject);
|
|
|
|
|
|
Info.Length = 0;
|
|
Info.ObjectSpace = 0;
|
|
Info.NumPackages = 1;
|
|
|
|
Status = AcpiUtWalkPackageTree (InternalObject, NULL,
|
|
AcpiUtGetElementLength, &Info);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* We have handled all of the objects in all levels of the package.
|
|
* just add the length of the package objects themselves.
|
|
* Round up to the next machine word.
|
|
*/
|
|
Info.Length += ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT)) *
|
|
(ACPI_SIZE) Info.NumPackages;
|
|
|
|
/* Return the total package length */
|
|
|
|
*ObjLength = Info.Length;
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtGetObjectSize
|
|
*
|
|
* PARAMETERS: InternalObject - An ACPI internal object
|
|
* ObjLength - Where the length will be returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to determine the space required to
|
|
* contain an object for return to an API user.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiUtGetObjectSize (
|
|
ACPI_OPERAND_OBJECT *InternalObject,
|
|
ACPI_SIZE *ObjLength)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
if ((ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_OPERAND) &&
|
|
(InternalObject->Common.Type == ACPI_TYPE_PACKAGE))
|
|
{
|
|
Status = AcpiUtGetPackageObjectSize (InternalObject, ObjLength);
|
|
}
|
|
else
|
|
{
|
|
Status = AcpiUtGetSimpleObjectSize (InternalObject, ObjLength);
|
|
}
|
|
|
|
return (Status);
|
|
}
|