724 lines
25 KiB
C
724 lines
25 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: nsaccess - Top-level functions for accessing ACPI namespace
|
|
* $Revision: 173 $
|
|
*
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* 2. License
|
|
*
|
|
* 2.1. This is your license from Intel Corp. under its intellectual property
|
|
* rights. You may have additional license terms from the party that provided
|
|
* you this software, covering your right to use that party's intellectual
|
|
* property rights.
|
|
*
|
|
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
|
|
* copy of the source code appearing in this file ("Covered Code") an
|
|
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
|
|
* base code distributed originally by Intel ("Original Intel Code") to copy,
|
|
* make derivatives, distribute, use and display any portion of the Covered
|
|
* Code in any form, with the right to sublicense such rights; and
|
|
*
|
|
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
|
|
* license (with the right to sublicense), under only those claims of Intel
|
|
* patents that are infringed by the Original Intel Code, to make, use, sell,
|
|
* offer to sell, and import the Covered Code and derivative works thereof
|
|
* solely to the minimum extent necessary to exercise the above copyright
|
|
* license, and in no event shall the patent license extend to any additions
|
|
* to or modifications of the Original Intel Code. No other license or right
|
|
* is granted directly or by implication, estoppel or otherwise;
|
|
*
|
|
* The above copyright and patent license is granted only if the following
|
|
* conditions are met:
|
|
*
|
|
* 3. Conditions
|
|
*
|
|
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification with rights to further distribute source must include
|
|
* the above Copyright Notice, the above License, this list of Conditions,
|
|
* and the following Disclaimer and Export Compliance provision. In addition,
|
|
* Licensee must cause all Covered Code to which Licensee contributes to
|
|
* contain a file documenting the changes Licensee made to create that Covered
|
|
* Code and the date of any change. Licensee must include in that file the
|
|
* documentation of any changes made by any predecessor Licensee. Licensee
|
|
* must include a prominent statement that the modification is derived,
|
|
* directly or indirectly, from Original Intel Code.
|
|
*
|
|
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification without rights to further distribute source must
|
|
* include the following Disclaimer and Export Compliance provision in the
|
|
* documentation and/or other materials provided with distribution. In
|
|
* addition, Licensee may not authorize further sublicense of source of any
|
|
* portion of the Covered Code, and must include terms to the effect that the
|
|
* license from Licensee to its licensee is limited to the intellectual
|
|
* property embodied in the software Licensee provides to its licensee, and
|
|
* not to intellectual property embodied in modifications its licensee may
|
|
* make.
|
|
*
|
|
* 3.3. Redistribution of Executable. Redistribution in executable form of any
|
|
* substantial portion of the Covered Code or modification must reproduce the
|
|
* above Copyright Notice, and the following Disclaimer and Export Compliance
|
|
* provision in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3.4. Intel retains all right, title, and interest in and to the Original
|
|
* Intel Code.
|
|
*
|
|
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
|
|
* Intel shall be used in advertising or otherwise to promote the sale, use or
|
|
* other dealings in products derived from or relating to the Covered Code
|
|
* without prior written authorization from Intel.
|
|
*
|
|
* 4. Disclaimer and Export Compliance
|
|
*
|
|
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
|
|
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
|
|
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
|
|
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
|
|
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE.
|
|
*
|
|
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
|
|
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
|
|
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
|
|
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
|
|
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
|
|
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
|
|
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
|
|
* LIMITED REMEDY.
|
|
*
|
|
* 4.3. Licensee shall not export, either directly or indirectly, any of this
|
|
* software or system incorporating such software without first obtaining any
|
|
* required license or other approval from the U. S. Department of Commerce or
|
|
* any other agency or department of the United States Government. In the
|
|
* event Licensee exports any such software from the United States or
|
|
* re-exports any such software from a foreign destination, Licensee shall
|
|
* ensure that the distribution and export/re-export of the software is in
|
|
* compliance with all laws, regulations, orders, or other restrictions of the
|
|
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
|
|
* any of its subsidiaries will export/re-export any technical data, process,
|
|
* software, or service, directly or indirectly, to any country for which the
|
|
* United States government or any agency thereof requires an export license,
|
|
* other governmental approval, or letter of assurance, without first obtaining
|
|
* such license, approval or letter.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#define __NSACCESS_C__
|
|
|
|
#include "acpi.h"
|
|
#include "amlcode.h"
|
|
#include "acnamesp.h"
|
|
#include "acdispat.h"
|
|
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
|
ACPI_MODULE_NAME ("nsaccess")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsRootInitialize
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Allocate and initialize the default root named objects
|
|
*
|
|
* MUTEX: Locks namespace for entire execution
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsRootInitialize (void)
|
|
{
|
|
ACPI_STATUS Status;
|
|
const ACPI_PREDEFINED_NAMES *InitVal = NULL;
|
|
ACPI_NAMESPACE_NODE *NewNode;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_STRING Val = NULL;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("NsRootInitialize");
|
|
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* The global root ptr is initially NULL, so a non-NULL value indicates
|
|
* that AcpiNsRootInitialize() has already been called; just return.
|
|
*/
|
|
if (AcpiGbl_RootNode)
|
|
{
|
|
Status = AE_OK;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/*
|
|
* Tell the rest of the subsystem that the root is initialized
|
|
* (This is OK because the namespace is locked)
|
|
*/
|
|
AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct;
|
|
|
|
/* Enter the pre-defined names in the name table */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"Entering predefined entries into namespace\n"));
|
|
|
|
for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++)
|
|
{
|
|
Status = AcpiNsLookup (NULL, InitVal->Name, InitVal->Type,
|
|
ACPI_IMODE_LOAD_PASS2, ACPI_NS_NO_UPSEARCH, NULL, &NewNode);
|
|
|
|
if (ACPI_FAILURE (Status) || (!NewNode)) /* Must be on same line for code converter */
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Could not create predefined name %s, %s\n",
|
|
InitVal->Name, AcpiFormatException (Status)));
|
|
}
|
|
|
|
/*
|
|
* Name entered successfully.
|
|
* If entry in PreDefinedNames[] specifies an
|
|
* initial value, create the initial value.
|
|
*/
|
|
if (InitVal->Val)
|
|
{
|
|
Status = AcpiOsPredefinedOverride (InitVal, &Val);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not override predefined %s\n",
|
|
InitVal->Name));
|
|
}
|
|
|
|
if (!Val)
|
|
{
|
|
Val = InitVal->Val;
|
|
}
|
|
|
|
/*
|
|
* Entry requests an initial value, allocate a
|
|
* descriptor for it.
|
|
*/
|
|
ObjDesc = AcpiUtCreateInternalObject (InitVal->Type);
|
|
if (!ObjDesc)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/*
|
|
* Convert value string from table entry to
|
|
* internal representation. Only types actually
|
|
* used for initial values are implemented here.
|
|
*/
|
|
switch (InitVal->Type)
|
|
{
|
|
case ACPI_TYPE_METHOD:
|
|
ObjDesc->Method.ParamCount =
|
|
(UINT8) ACPI_STRTOUL (Val, NULL, 10);
|
|
ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;
|
|
|
|
#if defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
|
|
|
|
/* Compiler cheats by putting parameter count in the OwnerID */
|
|
|
|
NewNode->OwnerId = ObjDesc->Method.ParamCount;
|
|
#endif
|
|
break;
|
|
|
|
case ACPI_TYPE_INTEGER:
|
|
|
|
ObjDesc->Integer.Value =
|
|
(ACPI_INTEGER) ACPI_STRTOUL (Val, NULL, 10);
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_STRING:
|
|
|
|
/*
|
|
* Build an object around the static string
|
|
*/
|
|
ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Val);
|
|
ObjDesc->String.Pointer = Val;
|
|
ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_MUTEX:
|
|
|
|
ObjDesc->Mutex.Node = NewNode;
|
|
ObjDesc->Mutex.SyncLevel =
|
|
(UINT16) ACPI_STRTOUL (Val, NULL, 10);
|
|
|
|
if (ACPI_STRCMP (InitVal->Name, "_GL_") == 0)
|
|
{
|
|
/*
|
|
* Create a counting semaphore for the
|
|
* global lock
|
|
*/
|
|
Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT,
|
|
1, &ObjDesc->Mutex.Semaphore);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/*
|
|
* We just created the mutex for the
|
|
* global lock, save it
|
|
*/
|
|
AcpiGbl_GlobalLockSemaphore = ObjDesc->Mutex.Semaphore;
|
|
}
|
|
else
|
|
{
|
|
/* Create a mutex */
|
|
|
|
Status = AcpiOsCreateSemaphore (1, 1,
|
|
&ObjDesc->Mutex.Semaphore);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
default:
|
|
ACPI_REPORT_ERROR (("Unsupported initial type value %X\n",
|
|
InitVal->Type));
|
|
AcpiUtRemoveReference (ObjDesc);
|
|
ObjDesc = NULL;
|
|
continue;
|
|
}
|
|
|
|
/* Store pointer to value descriptor in the Node */
|
|
|
|
Status = AcpiNsAttachObject (NewNode, ObjDesc, ACPI_GET_OBJECT_TYPE (ObjDesc));
|
|
|
|
/* Remove local reference to the object */
|
|
|
|
AcpiUtRemoveReference (ObjDesc);
|
|
}
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsLookup
|
|
*
|
|
* PARAMETERS: PrefixNode - Search scope if name is not fully qualified
|
|
* Pathname - Search pathname, in internal format
|
|
* (as represented in the AML stream)
|
|
* Type - Type associated with name
|
|
* InterpreterMode - IMODE_LOAD_PASS2 => add name if not found
|
|
* Flags - Flags describing the search restrictions
|
|
* WalkState - Current state of the walk
|
|
* ReturnNode - Where the Node is placed (if found
|
|
* or created successfully)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Find or enter the passed name in the name space.
|
|
* Log an error if name not found in Exec mode.
|
|
*
|
|
* MUTEX: Assumes namespace is locked.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsLookup (
|
|
ACPI_GENERIC_STATE *ScopeInfo,
|
|
char *Pathname,
|
|
ACPI_OBJECT_TYPE Type,
|
|
ACPI_INTERPRETER_MODE InterpreterMode,
|
|
UINT32 Flags,
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_NAMESPACE_NODE **ReturnNode)
|
|
{
|
|
ACPI_STATUS Status;
|
|
char *Path = Pathname;
|
|
ACPI_NAMESPACE_NODE *PrefixNode;
|
|
ACPI_NAMESPACE_NODE *CurrentNode = NULL;
|
|
ACPI_NAMESPACE_NODE *ThisNode = NULL;
|
|
UINT32 NumSegments;
|
|
UINT32 NumCarats;
|
|
ACPI_NAME SimpleName;
|
|
ACPI_OBJECT_TYPE TypeToCheckFor;
|
|
ACPI_OBJECT_TYPE ThisSearchType;
|
|
UINT32 SearchParentFlag = ACPI_NS_SEARCH_PARENT;
|
|
UINT32 LocalFlags = Flags & ~(ACPI_NS_ERROR_IF_FOUND |
|
|
ACPI_NS_SEARCH_PARENT);
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("NsLookup");
|
|
|
|
|
|
if (!ReturnNode)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
AcpiGbl_NsLookupCount++;
|
|
*ReturnNode = ACPI_ENTRY_NOT_FOUND;
|
|
|
|
if (!AcpiGbl_RootNode)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_NAMESPACE);
|
|
}
|
|
|
|
/*
|
|
* Get the prefix scope.
|
|
* A null scope means use the root scope
|
|
*/
|
|
if ((!ScopeInfo) ||
|
|
(!ScopeInfo->Scope.Node))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Null scope prefix, using root node (%p)\n",
|
|
AcpiGbl_RootNode));
|
|
|
|
PrefixNode = AcpiGbl_RootNode;
|
|
}
|
|
else
|
|
{
|
|
PrefixNode = ScopeInfo->Scope.Node;
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "[%p] Not a namespace node\n",
|
|
PrefixNode));
|
|
return_ACPI_STATUS (AE_AML_INTERNAL);
|
|
}
|
|
|
|
/*
|
|
* This node might not be a actual "scope" node (such as a
|
|
* Device/Method, etc.) It could be a Package or other object node.
|
|
* Backup up the tree to find the containing scope node.
|
|
*/
|
|
while (!AcpiNsOpensScope (PrefixNode->Type) &&
|
|
PrefixNode->Type != ACPI_TYPE_ANY)
|
|
{
|
|
PrefixNode = AcpiNsGetParentNode (PrefixNode);
|
|
}
|
|
}
|
|
|
|
/* Save type TBD: may be no longer necessary */
|
|
|
|
TypeToCheckFor = Type;
|
|
|
|
/*
|
|
* Begin examination of the actual pathname
|
|
*/
|
|
if (!Pathname)
|
|
{
|
|
/* A Null NamePath is allowed and refers to the root */
|
|
|
|
NumSegments = 0;
|
|
ThisNode = AcpiGbl_RootNode;
|
|
Path = "";
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Null Pathname (Zero segments), Flags=%X\n", Flags));
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Name pointer is valid (and must be in internal name format)
|
|
*
|
|
* Check for scope prefixes:
|
|
*
|
|
* As represented in the AML stream, a namepath consists of an
|
|
* optional scope prefix followed by a name segment part.
|
|
*
|
|
* If present, the scope prefix is either a Root Prefix (in
|
|
* which case the name is fully qualified), or one or more
|
|
* Parent Prefixes (in which case the name's scope is relative
|
|
* to the current scope).
|
|
*/
|
|
if (*Path == (UINT8) AML_ROOT_PREFIX)
|
|
{
|
|
/* Pathname is fully qualified, start from the root */
|
|
|
|
ThisNode = AcpiGbl_RootNode;
|
|
SearchParentFlag = ACPI_NS_NO_UPSEARCH;
|
|
|
|
/* Point to name segment part */
|
|
|
|
Path++;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Path is absolute from root [%p]\n", ThisNode));
|
|
}
|
|
else
|
|
{
|
|
/* Pathname is relative to current scope, start there */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Searching relative to prefix scope [%4.4s] (%p)\n",
|
|
PrefixNode->Name.Ascii, PrefixNode));
|
|
|
|
/*
|
|
* Handle multiple Parent Prefixes (carat) by just getting
|
|
* the parent node for each prefix instance.
|
|
*/
|
|
ThisNode = PrefixNode;
|
|
NumCarats = 0;
|
|
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
|
|
* part or the next Parent Prefix
|
|
*/
|
|
Path++;
|
|
|
|
/* Backup to the parent node */
|
|
|
|
NumCarats++;
|
|
ThisNode = AcpiNsGetParentNode (ThisNode);
|
|
if (!ThisNode)
|
|
{
|
|
/* Current scope has no parent scope */
|
|
|
|
ACPI_REPORT_ERROR (
|
|
("ACPI path has too many parent prefixes (^) - reached beyond root node\n"));
|
|
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 %d carat(s)\n",
|
|
ThisNode->Name.Ascii, 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_OP:
|
|
|
|
/* 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 (%d 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;
|
|
}
|
|
}
|
|
|
|
/* 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,
|
|
InterpreterMode, ThisSearchType, LocalFlags, &ThisNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
if (Status == AE_NOT_FOUND)
|
|
{
|
|
/* 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));
|
|
}
|
|
|
|
*ReturnNode = ThisNode;
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* 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 ((NumSegments == 0) &&
|
|
(TypeToCheckFor != ACPI_TYPE_ANY) &&
|
|
(TypeToCheckFor != ACPI_TYPE_LOCAL_ALIAS) &&
|
|
(TypeToCheckFor != ACPI_TYPE_LOCAL_SCOPE) &&
|
|
(ThisNode->Type != ACPI_TYPE_ANY) &&
|
|
(ThisNode->Type != TypeToCheckFor))
|
|
{
|
|
/* Complain about a type mismatch */
|
|
|
|
ACPI_REPORT_WARNING (
|
|
("NsLookup: Type mismatch on %4.4s (%s), searching for (%s)\n",
|
|
(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 see if it opens a scope.
|
|
*/
|
|
if ((NumSegments == 0) && (Type == ACPI_TYPE_ANY))
|
|
{
|
|
Type = ThisNode->Type;
|
|
}
|
|
|
|
/* Point to next name segment and make this node current */
|
|
|
|
Path += ACPI_NAME_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);
|
|
}
|
|
}
|
|
}
|
|
|
|
*ReturnNode = ThisNode;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|