354 lines
9.7 KiB
C
354 lines
9.7 KiB
C
/******************************************************************************
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*
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* Module Name: nsload - namespace loading/expanding/contracting procedures
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acdispat.h"
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#include "actables.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsload")
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/* Local prototypes */
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#ifdef ACPI_FUTURE_IMPLEMENTATION
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ACPI_STATUS
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AcpiNsUnloadNamespace (
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ACPI_HANDLE Handle);
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static ACPI_STATUS
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AcpiNsDeleteSubtree (
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ACPI_HANDLE StartHandle);
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#endif
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#ifndef ACPI_NO_METHOD_EXECUTION
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsLoadTable
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*
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* PARAMETERS: TableIndex - Index for table to be loaded
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* Node - Owning NS node
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load one ACPI table into the namespace
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsLoadTable (
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UINT32 TableIndex,
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ACPI_NAMESPACE_NODE *Node)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (NsLoadTable);
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/*
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* Parse the table and load the namespace with all named
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* objects found within. Control methods are NOT parsed
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* at this time. In fact, the control methods cannot be
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* parsed until the entire namespace is loaded, because
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* if a control method makes a forward reference (call)
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* to another control method, we can't continue parsing
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* because we don't know how many arguments to parse next!
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*/
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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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/* If table already loaded into namespace, just return */
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if (AcpiTbIsTableLoaded (TableIndex))
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{
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Status = AE_ALREADY_EXISTS;
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goto Unlock;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"**** Loading table into namespace ****\n"));
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Status = AcpiTbAllocateOwnerId (TableIndex);
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if (ACPI_FAILURE (Status))
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{
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goto Unlock;
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}
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Status = AcpiNsParseTable (TableIndex, Node);
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if (ACPI_SUCCESS (Status))
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{
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AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
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}
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else
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{
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(void) AcpiTbReleaseOwnerId (TableIndex);
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}
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Unlock:
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(void) AcpiUtReleaseMutex (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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* Now we can parse the control methods. We always parse
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* them here for a sanity check, and if configured for
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* just-in-time parsing, we delete the control method
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* parse trees.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"**** Begin Table Object Initialization\n"));
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Status = AcpiDsInitializeObjects (TableIndex, Node);
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"**** Completed Table Object Initialization\n"));
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return_ACPI_STATUS (Status);
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}
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#ifdef ACPI_OBSOLETE_FUNCTIONS
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/*******************************************************************************
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*
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* FUNCTION: AcpiLoadNamespace
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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: Load the name space from what ever is pointed to by DSDT.
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* (DSDT points to either the BIOS or a buffer.)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsLoadNamespace (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiLoadNameSpace);
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/* There must be at least a DSDT installed */
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if (AcpiGbl_DSDT == NULL)
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{
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ACPI_ERROR ((AE_INFO, "DSDT is not in memory"));
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return_ACPI_STATUS (AE_NO_ACPI_TABLES);
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}
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/*
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* Load the namespace. The DSDT is required,
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* but the SSDT and PSDT tables are optional.
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*/
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Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT);
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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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/* Ignore exceptions from these */
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(void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT);
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(void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT);
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
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"ACPI Namespace successfully loaded at root %p\n",
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AcpiGbl_RootNode));
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return_ACPI_STATUS (Status);
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}
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#endif
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#ifdef ACPI_FUTURE_IMPLEMENTATION
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDeleteSubtree
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*
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* PARAMETERS: StartHandle - Handle in namespace where search begins
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*
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* RETURNS Status
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*
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* DESCRIPTION: Walks the namespace starting at the given handle and deletes
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* all objects, entries, and scopes in the entire subtree.
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*
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* Namespace/Interpreter should be locked or the subsystem should
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* be in shutdown before this routine is called.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiNsDeleteSubtree (
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ACPI_HANDLE StartHandle)
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{
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ACPI_STATUS Status;
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ACPI_HANDLE ChildHandle;
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ACPI_HANDLE ParentHandle;
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ACPI_HANDLE NextChildHandle;
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ACPI_HANDLE Dummy;
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UINT32 Level;
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ACPI_FUNCTION_TRACE (NsDeleteSubtree);
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ParentHandle = StartHandle;
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ChildHandle = NULL;
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Level = 1;
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/*
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* Traverse the tree of objects until we bubble back up
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* to where we started.
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*/
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while (Level > 0)
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{
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/* Attempt to get the next object in this scope */
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Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle,
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ChildHandle, &NextChildHandle);
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ChildHandle = NextChildHandle;
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/* Did we get a new object? */
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if (ACPI_SUCCESS (Status))
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{
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/* Check if this object has any children */
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if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle,
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NULL, &Dummy)))
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{
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/*
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* There is at least one child of this object,
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* visit the object
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*/
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Level++;
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ParentHandle = ChildHandle;
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ChildHandle = NULL;
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}
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}
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else
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{
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/*
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* No more children in this object, go back up to
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* the object's parent
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*/
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Level--;
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/* Delete all children now */
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AcpiNsDeleteChildren (ChildHandle);
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ChildHandle = ParentHandle;
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Status = AcpiGetParent (ParentHandle, &ParentHandle);
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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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}
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/* Now delete the starting object, and we are done */
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AcpiNsRemoveNode (ChildHandle);
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsUnloadNameSpace
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*
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* PARAMETERS: Handle - Root of namespace subtree to be deleted
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*
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* RETURN: Status
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*
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* DESCRIPTION: Shrinks the namespace, typically in response to an undocking
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* event. Deletes an entire subtree starting from (and
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* including) the given handle.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsUnloadNamespace (
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ACPI_HANDLE Handle)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (NsUnloadNameSpace);
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/* Parameter validation */
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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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if (!Handle)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* This function does the real work */
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Status = AcpiNsDeleteSubtree (Handle);
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return_ACPI_STATUS (Status);
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}
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#endif
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#endif
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