568 lines
16 KiB
C
568 lines
16 KiB
C
/******************************************************************************
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*
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* Module Name: excreate - Named object creation
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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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#include "acpi.h"
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#include "accommon.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("excreate")
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#ifndef ACPI_NO_METHOD_EXECUTION
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/*******************************************************************************
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*
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* FUNCTION: AcpiExCreateAlias
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*
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* PARAMETERS: WalkState - Current state, contains operands
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new named alias
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCreateAlias (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_NAMESPACE_NODE *TargetNode;
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ACPI_NAMESPACE_NODE *AliasNode;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (ExCreateAlias);
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/* Get the source/alias operands (both namespace nodes) */
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AliasNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
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TargetNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[1];
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if ((TargetNode->Type == ACPI_TYPE_LOCAL_ALIAS) ||
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(TargetNode->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS))
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{
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/*
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* Dereference an existing alias so that we don't create a chain
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* of aliases. With this code, we guarantee that an alias is
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* always exactly one level of indirection away from the
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* actual aliased name.
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*/
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TargetNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, TargetNode->Object);
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}
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/*
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* For objects that can never change (i.e., the NS node will
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* permanently point to the same object), we can simply attach
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* the object to the new NS node. For other objects (such as
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* Integers, buffers, etc.), we have to point the Alias node
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* to the original Node.
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*/
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switch (TargetNode->Type)
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{
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/* For these types, the sub-object can change dynamically via a Store */
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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case ACPI_TYPE_PACKAGE:
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case ACPI_TYPE_BUFFER_FIELD:
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/*
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* These types open a new scope, so we need the NS node in order to access
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* any children.
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*/
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_POWER:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_THERMAL:
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case ACPI_TYPE_LOCAL_SCOPE:
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/*
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* The new alias has the type ALIAS and points to the original
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* NS node, not the object itself.
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*/
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AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS;
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AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
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break;
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case ACPI_TYPE_METHOD:
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/*
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* Control method aliases need to be differentiated
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*/
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AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
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AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
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break;
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default:
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/* Attach the original source object to the new Alias Node */
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/*
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* The new alias assumes the type of the target, and it points
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* to the same object. The reference count of the object has an
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* additional reference to prevent deletion out from under either the
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* target node or the alias Node
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*/
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Status = AcpiNsAttachObject (AliasNode,
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AcpiNsGetAttachedObject (TargetNode), TargetNode->Type);
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break;
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}
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/* Since both operands are Nodes, we don't need to delete them */
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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: AcpiExCreateEvent
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*
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* PARAMETERS: WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new event object
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCreateEvent (
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ACPI_WALK_STATE *WalkState)
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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 (ExCreateEvent);
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT);
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if (!ObjDesc)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/*
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* Create the actual OS semaphore, with zero initial units -- meaning
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* that the event is created in an unsignalled state
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*/
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Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0,
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&ObjDesc->Event.OsSemaphore);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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/* Attach object to the Node */
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Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) WalkState->Operands[0],
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ObjDesc, ACPI_TYPE_EVENT);
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Cleanup:
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/*
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* Remove local reference to the object (on error, will cause deletion
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* of both object and semaphore if present.)
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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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*
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* FUNCTION: AcpiExCreateMutex
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*
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* PARAMETERS: WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new mutex object
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*
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* Mutex (Name[0], SyncLevel[1])
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCreateMutex (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_FUNCTION_TRACE_PTR (ExCreateMutex, ACPI_WALK_OPERANDS);
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/* Create the new mutex object */
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX);
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if (!ObjDesc)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/* Create the actual OS Mutex */
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Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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/* Init object and attach to NS node */
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ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value;
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ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
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Status = AcpiNsAttachObject (ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX);
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Cleanup:
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/*
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* Remove local reference to the object (on error, will cause deletion
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* of both object and semaphore if present.)
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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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*
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* FUNCTION: AcpiExCreateRegion
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*
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* PARAMETERS: AmlStart - Pointer to the region declaration AML
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* AmlLength - Max length of the declaration AML
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* SpaceId - Address space ID for the region
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* WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new operation region object
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCreateRegion (
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UINT8 *AmlStart,
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UINT32 AmlLength,
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UINT8 SpaceId,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_OPERAND_OBJECT *RegionObj2;
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ACPI_FUNCTION_TRACE (ExCreateRegion);
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/* Get the Namespace Node */
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Node = WalkState->Op->Common.Node;
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/*
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* If the region object is already attached to this node,
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* just return
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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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/*
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* Space ID must be one of the predefined IDs, or in the user-defined
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* range
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*/
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if (!AcpiIsValidSpaceId (SpaceId))
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{
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/*
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* Print an error message, but continue. We don't want to abort
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* a table load for this exception. Instead, if the region is
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* actually used at runtime, abort the executing method.
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*/
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ACPI_ERROR ((AE_INFO, "Invalid/unknown Address Space ID: 0x%2.2X", SpaceId));
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
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AcpiUtGetRegionName (SpaceId), SpaceId));
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/* Create the region descriptor */
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
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if (!ObjDesc)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/*
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* Remember location in AML stream of address & length
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* operands since they need to be evaluated at run time.
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*/
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RegionObj2 = ObjDesc->Common.NextObject;
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RegionObj2->Extra.AmlStart = AmlStart;
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RegionObj2->Extra.AmlLength = AmlLength;
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if (WalkState->ScopeInfo)
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{
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RegionObj2->Extra.ScopeNode = WalkState->ScopeInfo->Scope.Node;
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}
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else
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{
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RegionObj2->Extra.ScopeNode = Node;
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}
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/* Init the region from the operands */
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ObjDesc->Region.SpaceId = SpaceId;
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ObjDesc->Region.Address = 0;
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ObjDesc->Region.Length = 0;
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ObjDesc->Region.Node = Node;
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/* Install the new region object in the parent Node */
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Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION);
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Cleanup:
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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: AcpiExCreateProcessor
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*
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* PARAMETERS: WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new processor object and populate the fields
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*
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* Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3])
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCreateProcessor (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState);
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/* Create the processor object */
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR);
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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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/* Initialize the processor object from the operands */
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ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value;
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ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value;
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ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value;
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/* Install the processor object in the parent Node */
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Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
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ObjDesc, ACPI_TYPE_PROCESSOR);
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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: AcpiExCreatePowerResource
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*
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* PARAMETERS: WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new PowerResource object and populate the fields
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*
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* PowerResource (Name[0], SystemLevel[1], ResourceOrder[2])
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCreatePowerResource (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState);
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/* Create the power resource object */
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER);
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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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/* Initialize the power object from the operands */
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ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value;
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ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value;
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/* Install the power resource object in the parent Node */
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Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
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ObjDesc, ACPI_TYPE_POWER);
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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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#endif
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/*******************************************************************************
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*
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* FUNCTION: AcpiExCreateMethod
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*
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* PARAMETERS: AmlStart - First byte of the method's AML
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* AmlLength - AML byte count for this method
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* WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new method object
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCreateMethod (
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UINT8 *AmlStart,
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UINT32 AmlLength,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STATUS Status;
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UINT8 MethodFlags;
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ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState);
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/* Create a new method object */
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD);
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if (!ObjDesc)
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{
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Status = AE_NO_MEMORY;
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goto Exit;
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}
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/* Save the method's AML pointer and length */
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ObjDesc->Method.AmlStart = AmlStart;
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ObjDesc->Method.AmlLength = AmlLength;
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/*
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* Disassemble the method flags. Split off the ArgCount, Serialized
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* flag, and SyncLevel for efficiency.
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*/
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MethodFlags = (UINT8) Operand[1]->Integer.Value;
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ObjDesc->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT);
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/*
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* Get the SyncLevel. If method is serialized, a mutex will be
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* created for this method when it is parsed.
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*/
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if (MethodFlags & AML_METHOD_SERIALIZED)
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{
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ObjDesc->Method.InfoFlags = ACPI_METHOD_SERIALIZED;
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/*
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* ACPI 1.0: SyncLevel = 0
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* ACPI 2.0: SyncLevel = SyncLevel in method declaration
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*/
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ObjDesc->Method.SyncLevel = (UINT8)
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((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4);
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}
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/* Attach the new object to the method Node */
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Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
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ObjDesc, ACPI_TYPE_METHOD);
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/* Remove local reference to the object */
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AcpiUtRemoveReference (ObjDesc);
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Exit:
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/* Remove a reference to the operand */
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AcpiUtRemoveReference (Operand[1]);
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return_ACPI_STATUS (Status);
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}
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