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/******************************************************************************
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*
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* Module Name: aslopt- Compiler optimizations
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2018, 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 "aslcompiler.h"
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#include "aslcompiler.y.h"
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#include "acparser.h"
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#include "amlcode.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_COMPILER
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ACPI_MODULE_NAME ("aslopt")
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static UINT32 OptTotal = 0;
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/* Local prototypes */
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static ACPI_STATUS
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OptSearchToRoot (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *CurrentNode,
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ACPI_NAMESPACE_NODE *TargetNode,
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ACPI_BUFFER *TargetPath,
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char **NewPath);
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static ACPI_STATUS
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OptBuildShortestPath (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *CurrentNode,
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ACPI_NAMESPACE_NODE *TargetNode,
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ACPI_BUFFER *CurrentPath,
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ACPI_BUFFER *TargetPath,
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ACPI_SIZE AmlNameStringLength,
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UINT8 IsDeclaration,
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char **ReturnNewPath);
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static ACPI_STATUS
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OptOptimizeNameDeclaration (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *CurrentNode,
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ACPI_NAMESPACE_NODE *TargetNode,
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char *AmlNameString,
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char **NewPath);
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/*******************************************************************************
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*
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* FUNCTION: OptSearchToRoot
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*
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* PARAMETERS: Op - Current parser op
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* WalkState - Current state
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* CurrentNode - Where we are in the namespace
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* TargetNode - Node to which we are referring
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* TargetPath - External full path to the target node
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* NewPath - Where the optimized path is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Attempt to optimize a reference to a single 4-character ACPI
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* name utilizing the search-to-root name resolution algorithm
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* that is used by AML interpreters.
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*
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******************************************************************************/
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static ACPI_STATUS
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OptSearchToRoot (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *CurrentNode,
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ACPI_NAMESPACE_NODE *TargetNode,
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ACPI_BUFFER *TargetPath,
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char **NewPath)
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{
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ACPI_NAMESPACE_NODE *Node;
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ACPI_GENERIC_STATE ScopeInfo;
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ACPI_STATUS Status;
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char *Path;
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ACPI_FUNCTION_NAME (OptSearchToRoot);
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/*
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* Check if search-to-root can be utilized. Use the last NameSeg of
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* the NamePath and 1) See if can be found and 2) If found, make
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* sure that it is the same node that we want. If there is another
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* name in the search path before the one we want, the nodes will
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* not match, and we cannot use this optimization.
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*/
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Path = &(((char *) TargetPath->Pointer)[
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TargetPath->Length - ACPI_NAME_SIZE]);
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ScopeInfo.Scope.Node = CurrentNode;
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/* Lookup the NameSeg using SEARCH_PARENT (search-to-root) */
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Status = AcpiNsLookup (&ScopeInfo, Path, ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
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ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
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WalkState, &(Node));
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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/*
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* We found the name, but we must check to make sure that the node
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* matches. Otherwise, there is another identical name in the search
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* path that precludes the use of this optimization.
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*/
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if (Node != TargetNode)
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{
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/*
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* This means that another object with the same name was found first,
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* and we cannot use this optimization.
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*/
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return (AE_NOT_FOUND);
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}
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/* Found the node, we can use this optimization */
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
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"NAMESEG: %-24s", Path));
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/* We must allocate a new string for the name (TargetPath gets deleted) */
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*NewPath = UtLocalCacheCalloc (ACPI_NAME_SIZE + 1);
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strcpy (*NewPath, Path);
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if (strncmp (*NewPath, "_T_", 3))
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{
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AslError (ASL_OPTIMIZATION, ASL_MSG_SINGLE_NAME_OPTIMIZATION,
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Op, *NewPath);
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: OptBuildShortestPath
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*
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* PARAMETERS: Op - Current parser op
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* WalkState - Current state
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* CurrentNode - Where we are in the namespace
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* TargetNode - Node to which we are referring
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* CurrentPath - External full path to the current node
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* TargetPath - External full path to the target node
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* AmlNameStringLength - Length of the original namepath
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* IsDeclaration - TRUE for declaration, FALSE for reference
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* ReturnNewPath - Where the optimized path is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Build an optimal NamePath using carats
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*
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******************************************************************************/
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static ACPI_STATUS
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OptBuildShortestPath (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *CurrentNode,
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ACPI_NAMESPACE_NODE *TargetNode,
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ACPI_BUFFER *CurrentPath,
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ACPI_BUFFER *TargetPath,
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ACPI_SIZE AmlNameStringLength,
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UINT8 IsDeclaration,
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char **ReturnNewPath)
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{
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UINT32 NumCommonSegments;
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UINT32 MaxCommonSegments;
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UINT32 Index;
|
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UINT32 NumCarats;
|
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UINT32 i;
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char *NewPathInternal;
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char *NewPathExternal;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_GENERIC_STATE ScopeInfo;
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ACPI_STATUS Status;
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BOOLEAN SubPath = FALSE;
|
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ACPI_FUNCTION_NAME (OptBuildShortestPath);
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ScopeInfo.Scope.Node = CurrentNode;
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/*
|
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* Determine the maximum number of NameSegs that the Target and Current paths
|
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* can possibly have in common. (To optimize, we have to have at least 1)
|
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*
|
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* Note: The external NamePath string lengths are always a multiple of 5
|
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* (ACPI_NAME_SIZE + separator)
|
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*/
|
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MaxCommonSegments = TargetPath->Length / ACPI_PATH_SEGMENT_LENGTH;
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if (CurrentPath->Length < TargetPath->Length)
|
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{
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MaxCommonSegments = CurrentPath->Length / ACPI_PATH_SEGMENT_LENGTH;
|
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}
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|
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/*
|
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* Determine how many NameSegs the two paths have in common.
|
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* (Starting from the root)
|
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*/
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for (NumCommonSegments = 0;
|
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NumCommonSegments < MaxCommonSegments;
|
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NumCommonSegments++)
|
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{
|
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/* Compare two single NameSegs */
|
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Index = (NumCommonSegments * ACPI_PATH_SEGMENT_LENGTH) + 1;
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|
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if (!ACPI_COMPARE_NAME (
|
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&(ACPI_CAST_PTR (char, TargetPath->Pointer)) [Index],
|
|
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&(ACPI_CAST_PTR (char, CurrentPath->Pointer)) [Index]))
|
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{
|
|
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/* Mismatch */
|
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|
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break;
|
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}
|
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}
|
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|
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, " COMMON: %u",
|
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NumCommonSegments));
|
|
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|
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/* There must be at least 1 common NameSeg in order to optimize */
|
|
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|
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if (NumCommonSegments == 0)
|
|
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{
|
|
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return (AE_NOT_FOUND);
|
|
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}
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|
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if (NumCommonSegments == MaxCommonSegments)
|
|
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{
|
|
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if (CurrentPath->Length == TargetPath->Length)
|
|
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{
|
|
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, " SAME PATH"));
|
|
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return (AE_NOT_FOUND);
|
|
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}
|
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else
|
|
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{
|
|
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, " SUBPATH"));
|
|
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SubPath = TRUE;
|
|
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}
|
|
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}
|
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1fb00e |
|
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1fb00e |
/* Determine how many prefix Carats are required */
|
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1fb00e |
|
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Packit Service |
1fb00e |
NumCarats = (CurrentPath->Length / ACPI_PATH_SEGMENT_LENGTH) -
|
|
Packit Service |
1fb00e |
NumCommonSegments;
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* Construct a new target string
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
NewPathExternal =
|
|
Packit Service |
1fb00e |
ACPI_ALLOCATE_ZEROED (TargetPath->Length + NumCarats + 1);
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Insert the Carats into the Target string */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
for (i = 0; i < NumCarats; i++)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
NewPathExternal[i] = AML_PARENT_PREFIX;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* Copy only the necessary (optimal) segments from the original
|
|
Packit Service |
1fb00e |
* target string
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Index = (NumCommonSegments * ACPI_PATH_SEGMENT_LENGTH) + 1;
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Special handling for exact subpath in a name declaration */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (IsDeclaration && SubPath &&
|
|
Packit Service |
1fb00e |
(CurrentPath->Length > TargetPath->Length))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* The current path is longer than the target, and the target is a
|
|
Packit Service |
1fb00e |
* subpath of the current path. We must include one more NameSeg of
|
|
Packit Service |
1fb00e |
* the target path
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Index -= ACPI_PATH_SEGMENT_LENGTH;
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Special handling for Scope() operator */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (Op->Asl.AmlOpcode == AML_SCOPE_OP)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
NewPathExternal[i] = AML_PARENT_PREFIX;
|
|
Packit Service |
1fb00e |
i++;
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, "(EXTRA ^)"));
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Make sure we haven't gone off the end of the target path */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (Index > TargetPath->Length)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
Index = TargetPath->Length;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
strcpy (&NewPathExternal[i],
|
|
Packit Service |
1fb00e |
&(ACPI_CAST_PTR (char, TargetPath->Pointer))[Index]);
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, " %-24s", NewPathExternal));
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* Internalize the new target string and check it against the original
|
|
Packit Service |
1fb00e |
* string to make sure that this is in fact an optimization. If the
|
|
Packit Service |
1fb00e |
* original string is already optimal, there is no point in continuing.
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Status = AcpiNsInternalizeName (NewPathExternal, &NewPathInternal);
|
|
Packit Service |
1fb00e |
if (ACPI_FAILURE (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
AslCoreSubsystemError (Op, Status, "Internalizing new NamePath",
|
|
Packit Service |
1fb00e |
ASL_NO_ABORT);
|
|
Packit Service |
1fb00e |
goto Cleanup;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (strlen (NewPathInternal) >= AmlNameStringLength)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
1fb00e |
" NOT SHORTER (New %u old %u)",
|
|
Packit Service |
1fb00e |
(UINT32) strlen (NewPathInternal),
|
|
Packit Service |
1fb00e |
(UINT32) AmlNameStringLength));
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_FREE (NewPathInternal);
|
|
Packit Service |
1fb00e |
Status = AE_NOT_FOUND;
|
|
Packit Service |
1fb00e |
goto Cleanup;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* Check to make sure that the optimization finds the node we are
|
|
Packit Service |
1fb00e |
* looking for. This is simply a sanity check on the new
|
|
Packit Service |
1fb00e |
* path that has been created.
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Status = AcpiNsLookup (&ScopeInfo, NewPathInternal,
|
|
Packit Service |
1fb00e |
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
|
Packit Service |
1fb00e |
ACPI_NS_DONT_OPEN_SCOPE, WalkState, &(Node));
|
|
Packit Service |
1fb00e |
if (ACPI_SUCCESS (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* Found the namepath, but make sure the node is correct */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (Node == TargetNode)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* The lookup matched the node, accept this optimization */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
AslError (ASL_OPTIMIZATION, ASL_MSG_NAME_OPTIMIZATION,
|
|
Packit Service |
1fb00e |
Op, NewPathExternal);
|
|
Packit Service |
1fb00e |
*ReturnNewPath = NewPathInternal;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* Node is not correct, do not use this optimization */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
Status = AE_NOT_FOUND;
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, " ***** WRONG NODE"));
|
|
Packit Service |
1fb00e |
AslError (ASL_WARNING, ASL_MSG_COMPILER_INTERNAL, Op,
|
|
Packit Service |
1fb00e |
"Not using optimized name - found wrong node");
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* The lookup failed, we obviously cannot use this optimization */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_FREE (NewPathInternal);
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, " ***** NOT FOUND"));
|
|
Packit Service |
1fb00e |
AslError (ASL_WARNING, ASL_MSG_COMPILER_INTERNAL, Op,
|
|
Packit Service |
1fb00e |
"Not using optimized name - did not find node");
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
Cleanup:
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_FREE (NewPathExternal);
|
|
Packit Service |
1fb00e |
return (Status);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*******************************************************************************
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* FUNCTION: OptOptimizeNameDeclaration
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* PARAMETERS: Op - Current parser op
|
|
Packit Service |
1fb00e |
* WalkState - Current state
|
|
Packit Service |
1fb00e |
* CurrentNode - Where we are in the namespace
|
|
Packit Service |
1fb00e |
* AmlNameString - Unoptimized namepath
|
|
Packit Service |
1fb00e |
* NewPath - Where the optimized path is returned
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* RETURN: Status. AE_OK If path is optimized
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* DESCRIPTION: Perform a simple optimization of removing an extraneous
|
|
Packit Service |
1fb00e |
* backslash prefix if we are already at the root scope.
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
******************************************************************************/
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
static ACPI_STATUS
|
|
Packit Service |
1fb00e |
OptOptimizeNameDeclaration (
|
|
Packit Service |
1fb00e |
ACPI_PARSE_OBJECT *Op,
|
|
Packit Service |
1fb00e |
ACPI_WALK_STATE *WalkState,
|
|
Packit Service |
1fb00e |
ACPI_NAMESPACE_NODE *CurrentNode,
|
|
Packit Service |
1fb00e |
ACPI_NAMESPACE_NODE *TargetNode,
|
|
Packit Service |
1fb00e |
char *AmlNameString,
|
|
Packit Service |
1fb00e |
char **NewPath)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
ACPI_STATUS Status;
|
|
Packit Service |
1fb00e |
char *NewPathExternal;
|
|
Packit Service |
1fb00e |
ACPI_NAMESPACE_NODE *Node;
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_FUNCTION_TRACE (OptOptimizeNameDeclaration);
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (((CurrentNode == AcpiGbl_RootNode) ||
|
|
Packit Service |
1fb00e |
(Op->Common.Parent->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK)) &&
|
|
Packit Service |
1fb00e |
(ACPI_IS_ROOT_PREFIX (AmlNameString[0])))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* The current scope is the root, and the namepath has a root prefix
|
|
Packit Service |
1fb00e |
* that is therefore extraneous. Remove it.
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
*NewPath = &AmlNameString[1];
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Debug output */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
Status = AcpiNsExternalizeName (ACPI_UINT32_MAX, *NewPath,
|
|
Packit Service |
1fb00e |
NULL, &NewPathExternal);
|
|
Packit Service |
1fb00e |
if (ACPI_FAILURE (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
AslCoreSubsystemError (Op, Status, "Externalizing NamePath",
|
|
Packit Service |
1fb00e |
ASL_NO_ABORT);
|
|
Packit Service |
1fb00e |
return (Status);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* Check to make sure that the optimization finds the node we are
|
|
Packit Service |
1fb00e |
* looking for. This is simply a sanity check on the new
|
|
Packit Service |
1fb00e |
* path that has been created.
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* We know that we are at the root, so NULL is used for the scope.
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Status = AcpiNsLookup (NULL, *NewPath,
|
|
Packit Service |
1fb00e |
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
|
Packit Service |
1fb00e |
ACPI_NS_DONT_OPEN_SCOPE, WalkState, &(Node));
|
|
Packit Service |
1fb00e |
if (ACPI_SUCCESS (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* Found the namepath, but make sure the node is correct */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (Node == TargetNode)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* The lookup matched the node, accept this optimization */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
AslError (ASL_OPTIMIZATION, ASL_MSG_NAME_OPTIMIZATION,
|
|
Packit Service |
1fb00e |
Op, NewPathExternal);
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
1fb00e |
"AT ROOT: %-24s", NewPathExternal));
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* Node is not correct, do not use this optimization */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
Status = AE_NOT_FOUND;
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
1fb00e |
" ***** WRONG NODE"));
|
|
Packit Service |
1fb00e |
AslError (ASL_WARNING, ASL_MSG_COMPILER_INTERNAL, Op,
|
|
Packit Service |
1fb00e |
"Not using optimized name - found wrong node");
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* The lookup failed, we obviously cannot use this optimization */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
1fb00e |
" ***** NOT FOUND"));
|
|
Packit Service |
1fb00e |
AslError (ASL_WARNING, ASL_MSG_COMPILER_INTERNAL, Op,
|
|
Packit Service |
1fb00e |
"Not using optimized name - did not find node");
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_FREE (NewPathExternal);
|
|
Packit Service |
1fb00e |
return (Status);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Could not optimize */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
return (AE_NOT_FOUND);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*******************************************************************************
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* FUNCTION: OptOptimizeNamePath
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* PARAMETERS: Op - Current parser op
|
|
Packit Service |
1fb00e |
* Flags - Opcode info flags
|
|
Packit Service |
1fb00e |
* WalkState - Current state
|
|
Packit Service |
1fb00e |
* AmlNameString - Unoptimized namepath
|
|
Packit Service |
1fb00e |
* TargetNode - Node to which AmlNameString refers
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* RETURN: None. If path is optimized, the Op is updated with new path
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* DESCRIPTION: Optimize a Named Declaration or Reference to the minimal length.
|
|
Packit Service |
1fb00e |
* Must take into account both the current location in the
|
|
Packit Service |
1fb00e |
* namespace and the actual reference path.
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
******************************************************************************/
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
void
|
|
Packit Service |
1fb00e |
OptOptimizeNamePath (
|
|
Packit Service |
1fb00e |
ACPI_PARSE_OBJECT *Op,
|
|
Packit Service |
1fb00e |
UINT32 Flags,
|
|
Packit Service |
1fb00e |
ACPI_WALK_STATE *WalkState,
|
|
Packit Service |
1fb00e |
char *AmlNameString,
|
|
Packit Service |
1fb00e |
ACPI_NAMESPACE_NODE *TargetNode)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
ACPI_STATUS Status;
|
|
Packit Service |
1fb00e |
ACPI_BUFFER TargetPath;
|
|
Packit Service |
1fb00e |
ACPI_BUFFER CurrentPath;
|
|
Packit Service |
1fb00e |
ACPI_SIZE AmlNameStringLength;
|
|
Packit Service |
1fb00e |
ACPI_NAMESPACE_NODE *CurrentNode;
|
|
Packit Service |
1fb00e |
char *ExternalNameString;
|
|
Packit Service |
1fb00e |
char *NewPath = NULL;
|
|
Packit Service |
1fb00e |
ACPI_SIZE HowMuchShorter;
|
|
Packit Service |
1fb00e |
ACPI_PARSE_OBJECT *NextOp;
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_FUNCTION_TRACE (OptOptimizeNamePath);
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* This is an optional optimization */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (!Gbl_ReferenceOptimizationFlag)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
return_VOID;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Various required items */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (!TargetNode || !WalkState || !AmlNameString || !Op->Common.Parent)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
return_VOID;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
f54687 |
"PATH OPTIMIZE: Line %5u ParentOp [%12.12s] ThisOp [%12.12s] ",
|
|
Packit Service |
1fb00e |
Op->Asl.LogicalLineNumber,
|
|
Packit Service |
1fb00e |
AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode),
|
|
Packit Service |
1fb00e |
AcpiPsGetOpcodeName (Op->Common.AmlOpcode)));
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (!(Flags & (AML_NAMED | AML_CREATE)))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
if (Op->Asl.CompileFlags & OP_IS_NAME_DECLARATION)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* We don't want to fuss with actual name declaration nodes here */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
1fb00e |
"******* NAME DECLARATION\n"));
|
|
Packit Service |
1fb00e |
return_VOID;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* The original path must be longer than one NameSeg (4 chars) for there
|
|
Packit Service |
1fb00e |
* to be any possibility that it can be optimized to a shorter string
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
AmlNameStringLength = strlen (AmlNameString);
|
|
Packit Service |
1fb00e |
if (AmlNameStringLength <= ACPI_NAME_SIZE)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
1fb00e |
"NAMESEG %4.4s\n", AmlNameString));
|
|
Packit Service |
1fb00e |
return_VOID;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* We need to obtain the node that represents the current scope -- where
|
|
Packit Service |
1fb00e |
* we are right now in the namespace. We will compare this path
|
|
Packit Service |
1fb00e |
* against the Namepath, looking for commonality.
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
CurrentNode = AcpiGbl_RootNode;
|
|
Packit Service |
1fb00e |
if (WalkState->ScopeInfo)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
CurrentNode = WalkState->ScopeInfo->Scope.Node;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (Flags & (AML_NAMED | AML_CREATE))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* This is the declaration of a new name */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, "NAME\n"));
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* The node of interest is the parent of this node (the containing
|
|
Packit Service |
1fb00e |
* scope). The actual namespace node may be up more than one level
|
|
Packit Service |
1fb00e |
* of parse op or it may not exist at all (if we traverse back
|
|
Packit Service |
1fb00e |
* up to the root.)
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
NextOp = Op->Asl.Parent;
|
|
Packit Service |
1fb00e |
while (NextOp && (!NextOp->Asl.Node))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
NextOp = NextOp->Asl.Parent;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (NextOp && NextOp->Asl.Node)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
CurrentNode = NextOp->Asl.Node;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
CurrentNode = AcpiGbl_RootNode;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* This is a reference to an existing named object */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, "REFERENCE\n"));
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* Obtain the full paths to the two nodes that we are interested in
|
|
Packit Service |
1fb00e |
* (Target and current namespace location) in external
|
|
Packit Service |
1fb00e |
* format -- something we can easily manipulate
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
TargetPath.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
|
|
Packit Service |
1fb00e |
Status = AcpiNsHandleToPathname (TargetNode, &TargetPath, FALSE);
|
|
Packit Service |
1fb00e |
if (ACPI_FAILURE (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
AslCoreSubsystemError (Op, Status, "Getting Target NamePath",
|
|
Packit Service |
1fb00e |
ASL_NO_ABORT);
|
|
Packit Service |
1fb00e |
return_VOID;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
TargetPath.Length--; /* Subtract one for null terminator */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* CurrentPath is the path to this scope (where we are in the namespace) */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
CurrentPath.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
|
|
Packit Service |
1fb00e |
Status = AcpiNsHandleToPathname (CurrentNode, &CurrentPath, FALSE);
|
|
Packit Service |
1fb00e |
if (ACPI_FAILURE (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
AslCoreSubsystemError (Op, Status, "Getting Current NamePath",
|
|
Packit Service |
1fb00e |
ASL_NO_ABORT);
|
|
Packit Service |
1fb00e |
return_VOID;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
CurrentPath.Length--; /* Subtract one for null terminator */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Debug output only */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
Status = AcpiNsExternalizeName (ACPI_UINT32_MAX, AmlNameString,
|
|
Packit Service |
1fb00e |
NULL, &ExternalNameString);
|
|
Packit Service |
1fb00e |
if (ACPI_FAILURE (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
AslCoreSubsystemError (Op, Status, "Externalizing NamePath",
|
|
Packit Service |
1fb00e |
ASL_NO_ABORT);
|
|
Packit Service |
1fb00e |
return_VOID;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
1fb00e |
"CURRENT SCOPE: (%2u) %-37s FULL PATH TO NAME: (%2u) %-32s ACTUAL AML:%-32s\n",
|
|
Packit Service |
1fb00e |
(UINT32) CurrentPath.Length, (char *) CurrentPath.Pointer,
|
|
Packit Service |
1fb00e |
(UINT32) TargetPath.Length, (char *) TargetPath.Pointer,
|
|
Packit Service |
1fb00e |
ExternalNameString));
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_FREE (ExternalNameString);
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* Attempt an optmization depending on the type of namepath
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
if (Flags & (AML_NAMED | AML_CREATE))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* This is a named opcode and the namepath is a name declaration, not
|
|
Packit Service |
1fb00e |
* a reference.
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Status = OptOptimizeNameDeclaration (Op, WalkState, CurrentNode,
|
|
Packit Service |
1fb00e |
TargetNode, AmlNameString, &NewPath);
|
|
Packit Service |
1fb00e |
if (ACPI_FAILURE (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* 2) now attempt to
|
|
Packit Service |
1fb00e |
* optimize the namestring with carats (up-arrow)
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Status = OptBuildShortestPath (Op, WalkState, CurrentNode,
|
|
Packit Service |
1fb00e |
TargetNode, &CurrentPath, &TargetPath,
|
|
Packit Service |
1fb00e |
AmlNameStringLength, 1, &NewPath);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* This is a reference to an existing named object
|
|
Packit Service |
1fb00e |
*
|
|
Packit Service |
1fb00e |
* 1) Check if search-to-root can be utilized using the last
|
|
Packit Service |
1fb00e |
* NameSeg of the NamePath
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Status = OptSearchToRoot (Op, WalkState, CurrentNode,
|
|
Packit Service |
1fb00e |
TargetNode, &TargetPath, &NewPath);
|
|
Packit Service |
1fb00e |
if (ACPI_FAILURE (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* 2) Search-to-root could not be used, now attempt to
|
|
Packit Service |
1fb00e |
* optimize the namestring with carats (up-arrow)
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Status = OptBuildShortestPath (Op, WalkState, CurrentNode,
|
|
Packit Service |
1fb00e |
TargetNode, &CurrentPath, &TargetPath,
|
|
Packit Service |
1fb00e |
AmlNameStringLength, 0, &NewPath);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* Success from above indicates that the NamePath was successfully
|
|
Packit Service |
1fb00e |
* optimized. We need to update the parse op with the new name
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
if (ACPI_SUCCESS (Status))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
HowMuchShorter = (AmlNameStringLength - strlen (NewPath));
|
|
Packit Service |
1fb00e |
OptTotal += HowMuchShorter;
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS,
|
|
Packit Service |
1fb00e |
" REDUCED BY %2u (TOTAL SAVED %2u)",
|
|
Packit Service |
1fb00e |
(UINT32) HowMuchShorter, OptTotal));
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
if (Flags & AML_NAMED)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
if (Op->Asl.AmlOpcode == AML_ALIAS_OP)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/*
|
|
Packit Service |
1fb00e |
* ALIAS is the only oddball opcode, the name declaration
|
|
Packit Service |
1fb00e |
* (alias name) is the second operand
|
|
Packit Service |
1fb00e |
*/
|
|
Packit Service |
1fb00e |
Op->Asl.Child->Asl.Next->Asl.Value.String = NewPath;
|
|
Packit Service |
1fb00e |
Op->Asl.Child->Asl.Next->Asl.AmlLength = strlen (NewPath);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
Op->Asl.Child->Asl.Value.String = NewPath;
|
|
Packit Service |
1fb00e |
Op->Asl.Child->Asl.AmlLength = strlen (NewPath);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else if (Flags & AML_CREATE)
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* Name must appear as the last parameter */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
NextOp = Op->Asl.Child;
|
|
Packit Service |
1fb00e |
while (!(NextOp->Asl.CompileFlags & OP_IS_NAME_DECLARATION))
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
NextOp = NextOp->Asl.Next;
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
/* Update the parse node with the new NamePath */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
NextOp->Asl.Value.String = NewPath;
|
|
Packit Service |
1fb00e |
NextOp->Asl.AmlLength = strlen (NewPath);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
/* Update the parse node with the new NamePath */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
Op->Asl.Value.String = NewPath;
|
|
Packit Service |
1fb00e |
Op->Asl.AmlLength = strlen (NewPath);
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
else
|
|
Packit Service |
1fb00e |
{
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, " ALREADY OPTIMAL"));
|
|
Packit Service |
1fb00e |
}
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
/* Cleanup path buffers */
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_FREE (TargetPath.Pointer);
|
|
Packit Service |
1fb00e |
ACPI_FREE (CurrentPath.Pointer);
|
|
Packit Service |
1fb00e |
|
|
Packit Service |
1fb00e |
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OPTIMIZATIONS, "\n"));
|
|
Packit Service |
1fb00e |
return_VOID;
|
|
Packit Service |
1fb00e |
}
|