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811 lines
26 KiB
C
811 lines
26 KiB
C
/*******************************************************************************
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*
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* Module Name: nsaccess - Top-level functions for accessing ACPI namespace
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2022, 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 MERCHANTABILITY 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 "amlcode.h"
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#include "acnamesp.h"
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#include "acdispat.h"
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#ifdef ACPI_ASL_COMPILER
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#include "acdisasm.h"
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#endif
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsaccess")
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsRootInitialize
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Allocate and initialize the default root named objects
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*
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* MUTEX: Locks namespace for entire execution
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsRootInitialize (
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void)
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{
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ACPI_STATUS Status;
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const ACPI_PREDEFINED_NAMES *InitVal = NULL;
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ACPI_NAMESPACE_NODE *NewNode;
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ACPI_NAMESPACE_NODE *PrevNode = NULL;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STRING Val = NULL;
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ACPI_FUNCTION_TRACE (NsRootInitialize);
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/*
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* The global root ptr is initially NULL, so a non-NULL value indicates
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* that AcpiNsRootInitialize() has already been called; just return.
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*/
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if (AcpiGbl_RootNode)
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{
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Status = AE_OK;
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goto UnlockAndExit;
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}
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/*
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* Tell the rest of the subsystem that the root is initialized
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* (This is OK because the namespace is locked)
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*/
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AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct;
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/* Enter the predefined names in the name table */
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Entering predefined entries into namespace\n"));
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/*
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* Create the initial (default) namespace.
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* This namespace looks like something similar to this:
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*
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* ACPI Namespace (from Namespace Root):
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* 0 _GPE Scope 00203160 00
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* 0 _PR_ Scope 002031D0 00
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* 0 _SB_ Device 00203240 00 Notify Object: 0020ADD8
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* 0 _SI_ Scope 002032B0 00
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* 0 _TZ_ Device 00203320 00
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* 0 _REV Integer 00203390 00 = 0000000000000002
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* 0 _OS_ String 00203488 00 Len 14 "Microsoft Windows NT"
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* 0 _GL_ Mutex 00203580 00 Object 002035F0
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* 0 _OSI Method 00203678 00 Args 1 Len 0000 Aml 00000000
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*/
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for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++)
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{
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Status = AE_OK;
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/* _OSI is optional for now, will be permanent later */
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if (!strcmp (InitVal->Name, "_OSI") && !AcpiGbl_CreateOsiMethod)
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{
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continue;
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}
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/*
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* Create, init, and link the new predefined name
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* Note: No need to use AcpiNsLookup here because all the
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* predefined names are at the root level. It is much easier to
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* just create and link the new node(s) here.
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*/
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NewNode = AcpiNsCreateNode (*ACPI_CAST_PTR (UINT32, InitVal->Name));
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if (!NewNode)
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{
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Status = AE_NO_MEMORY;
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goto UnlockAndExit;
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}
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NewNode->DescriptorType = ACPI_DESC_TYPE_NAMED;
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NewNode->Type = InitVal->Type;
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if (!PrevNode)
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{
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AcpiGbl_RootNodeStruct.Child = NewNode;
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}
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else
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{
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PrevNode->Peer = NewNode;
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}
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NewNode->Parent = &AcpiGbl_RootNodeStruct;
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PrevNode = NewNode;
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/*
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* Name entered successfully. If entry in PreDefinedNames[] specifies
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* an initial value, create the initial value.
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*/
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if (InitVal->Val)
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{
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Status = AcpiOsPredefinedOverride (InitVal, &Val);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO,
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"Could not override predefined %s",
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InitVal->Name));
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}
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if (!Val)
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{
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Val = InitVal->Val;
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}
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/*
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* Entry requests an initial value, allocate a
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* descriptor for it.
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*/
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ObjDesc = AcpiUtCreateInternalObject (InitVal->Type);
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if (!ObjDesc)
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{
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Status = AE_NO_MEMORY;
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goto UnlockAndExit;
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}
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/*
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* Convert value string from table entry to
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* internal representation. Only types actually
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* used for initial values are implemented here.
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*/
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switch (InitVal->Type)
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{
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case ACPI_TYPE_METHOD:
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ObjDesc->Method.ParamCount = (UINT8) ACPI_TO_INTEGER (Val);
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ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;
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#if defined (ACPI_ASL_COMPILER)
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/* Save the parameter count for the iASL compiler */
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NewNode->Value = ObjDesc->Method.ParamCount;
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#else
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/* Mark this as a very SPECIAL method (_OSI) */
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ObjDesc->Method.InfoFlags = ACPI_METHOD_INTERNAL_ONLY;
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ObjDesc->Method.Dispatch.Implementation = AcpiUtOsiImplementation;
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#endif
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break;
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case ACPI_TYPE_INTEGER:
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ObjDesc->Integer.Value = ACPI_TO_INTEGER (Val);
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break;
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case ACPI_TYPE_STRING:
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/* Build an object around the static string */
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ObjDesc->String.Length = (UINT32) strlen (Val);
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ObjDesc->String.Pointer = Val;
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ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
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break;
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case ACPI_TYPE_MUTEX:
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ObjDesc->Mutex.Node = NewNode;
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ObjDesc->Mutex.SyncLevel = (UINT8) (ACPI_TO_INTEGER (Val) - 1);
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/* Create a 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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AcpiUtRemoveReference (ObjDesc);
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goto UnlockAndExit;
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}
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/* Special case for ACPI Global Lock */
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if (strcmp (InitVal->Name, "_GL_") == 0)
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{
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AcpiGbl_GlobalLockMutex = ObjDesc;
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/* Create additional counting semaphore for global lock */
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Status = AcpiOsCreateSemaphore (
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1, 0, &AcpiGbl_GlobalLockSemaphore);
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if (ACPI_FAILURE (Status))
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{
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AcpiUtRemoveReference (ObjDesc);
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goto UnlockAndExit;
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}
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}
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Unsupported initial type value 0x%X",
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InitVal->Type));
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AcpiUtRemoveReference (ObjDesc);
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ObjDesc = NULL;
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continue;
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}
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/* Store pointer to value descriptor in the Node */
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Status = AcpiNsAttachObject (NewNode, ObjDesc,
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ObjDesc->Common.Type);
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/* Remove local reference to the object */
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AcpiUtRemoveReference (ObjDesc);
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}
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}
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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/* Save a handle to "_GPE", it is always present */
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if (ACPI_SUCCESS (Status))
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{
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Status = AcpiNsGetNode (NULL, "\\_GPE", ACPI_NS_NO_UPSEARCH,
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&AcpiGbl_FadtGpeDevice);
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}
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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: AcpiNsLookup
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*
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* PARAMETERS: ScopeInfo - Current scope info block
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* Pathname - Search pathname, in internal format
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* (as represented in the AML stream)
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* Type - Type associated with name
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* InterpreterMode - IMODE_LOAD_PASS2 => add name if not found
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* Flags - Flags describing the search restrictions
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* WalkState - Current state of the walk
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* ReturnNode - Where the Node is placed (if found
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* or created successfully)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Find or enter the passed name in the name space.
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* Log an error if name not found in Exec mode.
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*
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* MUTEX: Assumes namespace is locked.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsLookup (
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ACPI_GENERIC_STATE *ScopeInfo,
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char *Pathname,
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ACPI_OBJECT_TYPE Type,
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ACPI_INTERPRETER_MODE InterpreterMode,
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UINT32 Flags,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE **ReturnNode)
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{
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ACPI_STATUS Status;
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char *Path = Pathname;
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char *ExternalPath;
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ACPI_NAMESPACE_NODE *PrefixNode;
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ACPI_NAMESPACE_NODE *CurrentNode = NULL;
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ACPI_NAMESPACE_NODE *ThisNode = NULL;
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UINT32 NumSegments;
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UINT32 NumCarats;
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ACPI_NAME SimpleName;
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ACPI_OBJECT_TYPE TypeToCheckFor;
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ACPI_OBJECT_TYPE ThisSearchType;
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UINT32 SearchParentFlag = ACPI_NS_SEARCH_PARENT;
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UINT32 LocalFlags;
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ACPI_INTERPRETER_MODE LocalInterpreterMode;
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ACPI_FUNCTION_TRACE (NsLookup);
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if (!ReturnNode)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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LocalFlags = Flags &
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~(ACPI_NS_ERROR_IF_FOUND | ACPI_NS_OVERRIDE_IF_FOUND |
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ACPI_NS_SEARCH_PARENT);
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*ReturnNode = ACPI_ENTRY_NOT_FOUND;
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AcpiGbl_NsLookupCount++;
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if (!AcpiGbl_RootNode)
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{
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return_ACPI_STATUS (AE_NO_NAMESPACE);
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}
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/* Get the prefix scope. A null scope means use the root scope */
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if ((!ScopeInfo) ||
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(!ScopeInfo->Scope.Node))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Null scope prefix, using root node (%p)\n",
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AcpiGbl_RootNode));
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PrefixNode = AcpiGbl_RootNode;
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}
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else
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{
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PrefixNode = ScopeInfo->Scope.Node;
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if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED)
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{
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ACPI_ERROR ((AE_INFO, "%p is not a namespace node [%s]",
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PrefixNode, AcpiUtGetDescriptorName (PrefixNode)));
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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|
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if (!(Flags & ACPI_NS_PREFIX_IS_SCOPE))
|
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{
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/*
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* This node might not be a actual "scope" node (such as a
|
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* Device/Method, etc.) It could be a Package or other object
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* node. Backup up the tree to find the containing scope node.
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*/
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while (!AcpiNsOpensScope (PrefixNode->Type) &&
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PrefixNode->Type != ACPI_TYPE_ANY)
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{
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PrefixNode = PrefixNode->Parent;
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}
|
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}
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}
|
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|
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/* Save type. TBD: may be no longer necessary */
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TypeToCheckFor = Type;
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|
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/*
|
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* Begin examination of the actual pathname
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*/
|
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if (!Pathname)
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{
|
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/* A Null NamePath is allowed and refers to the root */
|
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NumSegments = 0;
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ThisNode = AcpiGbl_RootNode;
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Path = "";
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|
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Null Pathname (Zero segments), Flags=%X\n", Flags));
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}
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else
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{
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/*
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* Name pointer is valid (and must be in internal name format)
|
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*
|
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* Check for scope prefixes:
|
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*
|
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* As represented in the AML stream, a namepath consists of an
|
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* optional scope prefix followed by a name segment part.
|
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*
|
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* If present, the scope prefix is either a Root Prefix (in
|
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* which case the name is fully qualified), or one or more
|
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* Parent Prefixes (in which case the name's scope is relative
|
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* to the current scope).
|
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*/
|
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if (*Path == (UINT8) AML_ROOT_PREFIX)
|
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{
|
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/* Pathname is fully qualified, start from the root */
|
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|
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ThisNode = AcpiGbl_RootNode;
|
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SearchParentFlag = ACPI_NS_NO_UPSEARCH;
|
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|
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/* Point to name segment part */
|
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Path++;
|
|
|
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
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"Path is absolute from root [%p]\n", ThisNode));
|
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}
|
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else
|
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{
|
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/* Pathname is relative to current scope, start there */
|
|
|
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
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"Searching relative to prefix scope [%4.4s] (%p)\n",
|
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AcpiUtGetNodeName (PrefixNode), PrefixNode));
|
|
|
|
/*
|
|
* Handle multiple Parent Prefixes (carat) by just getting
|
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* the parent node for each prefix instance.
|
|
*/
|
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ThisNode = PrefixNode;
|
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NumCarats = 0;
|
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while (*Path == (UINT8) AML_PARENT_PREFIX)
|
|
{
|
|
/* Name is fully qualified, no search rules apply */
|
|
|
|
SearchParentFlag = ACPI_NS_NO_UPSEARCH;
|
|
|
|
/*
|
|
* Point past this prefix to the name segment
|
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* part or the next Parent Prefix
|
|
*/
|
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Path++;
|
|
|
|
/* Backup to the parent node */
|
|
|
|
NumCarats++;
|
|
ThisNode = ThisNode->Parent;
|
|
if (!ThisNode)
|
|
{
|
|
/*
|
|
* Current scope has no parent scope. Externalize
|
|
* the internal path for error message.
|
|
*/
|
|
Status = AcpiNsExternalizeName (ACPI_UINT32_MAX, Pathname,
|
|
NULL, &ExternalPath);
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"%s: Path has too many parent prefixes (^)",
|
|
ExternalPath));
|
|
|
|
ACPI_FREE (ExternalPath);
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_NOT_FOUND);
|
|
}
|
|
}
|
|
|
|
if (SearchParentFlag == ACPI_NS_NO_UPSEARCH)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Search scope is [%4.4s], path has %u carat(s)\n",
|
|
AcpiUtGetNodeName (ThisNode), NumCarats));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Determine the number of ACPI name segments in this pathname.
|
|
*
|
|
* The segment part consists of either:
|
|
* - A Null name segment (0)
|
|
* - A DualNamePrefix followed by two 4-byte name segments
|
|
* - A MultiNamePrefix followed by a byte indicating the
|
|
* number of segments and the segments themselves.
|
|
* - A single 4-byte name segment
|
|
*
|
|
* Examine the name prefix opcode, if any, to determine the number of
|
|
* segments.
|
|
*/
|
|
switch (*Path)
|
|
{
|
|
case 0:
|
|
/*
|
|
* Null name after a root or parent prefixes. We already
|
|
* have the correct target node and there are no name segments.
|
|
*/
|
|
NumSegments = 0;
|
|
Type = ThisNode->Type;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Prefix-only Pathname (Zero name segments), Flags=%X\n",
|
|
Flags));
|
|
break;
|
|
|
|
case AML_DUAL_NAME_PREFIX:
|
|
|
|
/* More than one NameSeg, search rules do not apply */
|
|
|
|
SearchParentFlag = ACPI_NS_NO_UPSEARCH;
|
|
|
|
/* Two segments, point to first name segment */
|
|
|
|
NumSegments = 2;
|
|
Path++;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Dual Pathname (2 segments, Flags=%X)\n", Flags));
|
|
break;
|
|
|
|
case AML_MULTI_NAME_PREFIX:
|
|
|
|
/* More than one NameSeg, search rules do not apply */
|
|
|
|
SearchParentFlag = ACPI_NS_NO_UPSEARCH;
|
|
|
|
/* Extract segment count, point to first name segment */
|
|
|
|
Path++;
|
|
NumSegments = (UINT32) (UINT8) *Path;
|
|
Path++;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Multi Pathname (%u Segments, Flags=%X)\n",
|
|
NumSegments, Flags));
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* Not a Null name, no Dual or Multi prefix, hence there is
|
|
* only one name segment and Pathname is already pointing to it.
|
|
*/
|
|
NumSegments = 1;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Simple Pathname (1 segment, Flags=%X)\n", Flags));
|
|
break;
|
|
}
|
|
|
|
ACPI_DEBUG_EXEC (AcpiNsPrintPathname (NumSegments, Path));
|
|
}
|
|
|
|
|
|
/*
|
|
* Search namespace for each segment of the name. Loop through and
|
|
* verify (or add to the namespace) each name segment.
|
|
*
|
|
* The object type is significant only at the last name
|
|
* segment. (We don't care about the types along the path, only
|
|
* the type of the final target object.)
|
|
*/
|
|
ThisSearchType = ACPI_TYPE_ANY;
|
|
CurrentNode = ThisNode;
|
|
|
|
while (NumSegments && CurrentNode)
|
|
{
|
|
NumSegments--;
|
|
if (!NumSegments)
|
|
{
|
|
/* This is the last segment, enable typechecking */
|
|
|
|
ThisSearchType = Type;
|
|
|
|
/*
|
|
* Only allow automatic parent search (search rules) if the caller
|
|
* requested it AND we have a single, non-fully-qualified NameSeg
|
|
*/
|
|
if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) &&
|
|
(Flags & ACPI_NS_SEARCH_PARENT))
|
|
{
|
|
LocalFlags |= ACPI_NS_SEARCH_PARENT;
|
|
}
|
|
|
|
/* Set error flag according to caller */
|
|
|
|
if (Flags & ACPI_NS_ERROR_IF_FOUND)
|
|
{
|
|
LocalFlags |= ACPI_NS_ERROR_IF_FOUND;
|
|
}
|
|
|
|
/* Set override flag according to caller */
|
|
|
|
if (Flags & ACPI_NS_OVERRIDE_IF_FOUND)
|
|
{
|
|
LocalFlags |= ACPI_NS_OVERRIDE_IF_FOUND;
|
|
}
|
|
}
|
|
|
|
/* Handle opcodes that create a new NameSeg via a full NamePath */
|
|
|
|
LocalInterpreterMode = InterpreterMode;
|
|
if ((Flags & ACPI_NS_PREFIX_MUST_EXIST) && (NumSegments > 0))
|
|
{
|
|
/* Every element of the path must exist (except for the final NameSeg) */
|
|
|
|
LocalInterpreterMode = ACPI_IMODE_EXECUTE;
|
|
}
|
|
|
|
/* Extract one ACPI name from the front of the pathname */
|
|
|
|
ACPI_MOVE_32_TO_32 (&SimpleName, Path);
|
|
|
|
/* Try to find the single (4 character) ACPI name */
|
|
|
|
Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode,
|
|
LocalInterpreterMode, ThisSearchType, LocalFlags, &ThisNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
if (Status == AE_NOT_FOUND)
|
|
{
|
|
#if !defined ACPI_ASL_COMPILER /* Note: iASL reports this error by itself, not needed here */
|
|
if (Flags & ACPI_NS_PREFIX_MUST_EXIST)
|
|
{
|
|
AcpiOsPrintf (ACPI_MSG_BIOS_ERROR
|
|
"Object does not exist: %4.4s\n", (char *) &SimpleName);
|
|
}
|
|
#endif
|
|
/* Name not found in ACPI namespace */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Name [%4.4s] not found in scope [%4.4s] %p\n",
|
|
(char *) &SimpleName, (char *) &CurrentNode->Name,
|
|
CurrentNode));
|
|
}
|
|
|
|
#ifdef ACPI_EXEC_APP
|
|
if ((Status == AE_ALREADY_EXISTS) &&
|
|
(ThisNode->Flags & ANOBJ_NODE_EARLY_INIT))
|
|
{
|
|
ThisNode->Flags &= ~ANOBJ_NODE_EARLY_INIT;
|
|
Status = AE_OK;
|
|
}
|
|
#endif
|
|
|
|
#ifdef ACPI_ASL_COMPILER
|
|
/*
|
|
* If this ACPI name already exists within the namespace as an
|
|
* external declaration, then mark the external as a conflicting
|
|
* declaration and proceed to process the current node as if it did
|
|
* not exist in the namespace. If this node is not processed as
|
|
* normal, then it could cause improper namespace resolution
|
|
* by failing to open a new scope.
|
|
*/
|
|
if (AcpiGbl_DisasmFlag &&
|
|
(Status == AE_ALREADY_EXISTS) &&
|
|
((ThisNode->Flags & ANOBJ_IS_EXTERNAL) ||
|
|
(WalkState && WalkState->Opcode == AML_EXTERNAL_OP)))
|
|
{
|
|
ThisNode->Flags &= ~ANOBJ_IS_EXTERNAL;
|
|
ThisNode->Type = (UINT8)ThisSearchType;
|
|
if (WalkState->Opcode != AML_EXTERNAL_OP)
|
|
{
|
|
AcpiDmMarkExternalConflict (ThisNode);
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
*ReturnNode = ThisNode;
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* More segments to follow? */
|
|
|
|
if (NumSegments > 0)
|
|
{
|
|
/*
|
|
* If we have an alias to an object that opens a scope (such as a
|
|
* device or processor), we need to dereference the alias here so
|
|
* that we can access any children of the original node (via the
|
|
* remaining segments).
|
|
*/
|
|
if (ThisNode->Type == ACPI_TYPE_LOCAL_ALIAS)
|
|
{
|
|
if (!ThisNode->Object)
|
|
{
|
|
return_ACPI_STATUS (AE_NOT_EXIST);
|
|
}
|
|
|
|
if (AcpiNsOpensScope (((ACPI_NAMESPACE_NODE *)
|
|
ThisNode->Object)->Type))
|
|
{
|
|
ThisNode = (ACPI_NAMESPACE_NODE *) ThisNode->Object;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Special handling for the last segment (NumSegments == 0) */
|
|
|
|
else
|
|
{
|
|
/*
|
|
* Sanity typecheck of the target object:
|
|
*
|
|
* If 1) This is the last segment (NumSegments == 0)
|
|
* 2) And we are looking for a specific type
|
|
* (Not checking for TYPE_ANY)
|
|
* 3) Which is not an alias
|
|
* 4) Which is not a local type (TYPE_SCOPE)
|
|
* 5) And the type of target object is known (not TYPE_ANY)
|
|
* 6) And target object does not match what we are looking for
|
|
*
|
|
* Then we have a type mismatch. Just warn and ignore it.
|
|
*/
|
|
if ((TypeToCheckFor != ACPI_TYPE_ANY) &&
|
|
(TypeToCheckFor != ACPI_TYPE_LOCAL_ALIAS) &&
|
|
(TypeToCheckFor != ACPI_TYPE_LOCAL_METHOD_ALIAS) &&
|
|
(TypeToCheckFor != ACPI_TYPE_LOCAL_SCOPE) &&
|
|
(ThisNode->Type != ACPI_TYPE_ANY) &&
|
|
(ThisNode->Type != TypeToCheckFor))
|
|
{
|
|
/* Complain about a type mismatch */
|
|
|
|
ACPI_WARNING ((AE_INFO,
|
|
"NsLookup: Type mismatch on %4.4s (%s), searching for (%s)",
|
|
ACPI_CAST_PTR (char, &SimpleName),
|
|
AcpiUtGetTypeName (ThisNode->Type),
|
|
AcpiUtGetTypeName (TypeToCheckFor)));
|
|
}
|
|
|
|
/*
|
|
* If this is the last name segment and we are not looking for a
|
|
* specific type, but the type of found object is known, use that
|
|
* type to (later) see if it opens a scope.
|
|
*/
|
|
if (Type == ACPI_TYPE_ANY)
|
|
{
|
|
Type = ThisNode->Type;
|
|
}
|
|
}
|
|
|
|
/* Point to next name segment and make this node current */
|
|
|
|
Path += ACPI_NAMESEG_SIZE;
|
|
CurrentNode = ThisNode;
|
|
}
|
|
|
|
/* Always check if we need to open a new scope */
|
|
|
|
if (!(Flags & ACPI_NS_DONT_OPEN_SCOPE) && (WalkState))
|
|
{
|
|
/*
|
|
* If entry is a type which opens a scope, push the new scope on the
|
|
* scope stack.
|
|
*/
|
|
if (AcpiNsOpensScope (Type))
|
|
{
|
|
Status = AcpiDsScopeStackPush (ThisNode, Type, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef ACPI_EXEC_APP
|
|
if (Flags & ACPI_NS_EARLY_INIT)
|
|
{
|
|
ThisNode->Flags |= ANOBJ_NODE_EARLY_INIT;
|
|
}
|
|
#endif
|
|
|
|
*ReturnNode = ThisNode;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|