+++ /dev/null
-/******************************************************************************
- *
- * Module Name: nsload - namespace loading/expanding/contracting procedures
- *
- *****************************************************************************/
-
-/*
- * Copyright (C) 2000 - 2017, Intel Corp.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- */
-
-#include "acpi.h"
-#include "accommon.h"
-#include "acnamesp.h"
-#include "acdispat.h"
-#include "actables.h"
-#include "acinterp.h"
-
-
-#define _COMPONENT ACPI_NAMESPACE
- ACPI_MODULE_NAME ("nsload")
-
-/* Local prototypes */
-
-#ifdef ACPI_FUTURE_IMPLEMENTATION
-ACPI_STATUS
-AcpiNsUnloadNamespace (
- ACPI_HANDLE Handle);
-
-static ACPI_STATUS
-AcpiNsDeleteSubtree (
- ACPI_HANDLE StartHandle);
-#endif
-
-
-#ifndef ACPI_NO_METHOD_EXECUTION
-/*******************************************************************************
- *
- * FUNCTION: AcpiNsLoadTable
- *
- * PARAMETERS: TableIndex - Index for table to be loaded
- * Node - Owning NS node
- *
- * RETURN: Status
- *
- * DESCRIPTION: Load one ACPI table into the namespace
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiNsLoadTable (
- UINT32 TableIndex,
- ACPI_NAMESPACE_NODE *Node)
-{
- ACPI_STATUS Status;
-
-
- ACPI_FUNCTION_TRACE (NsLoadTable);
-
-
- /* If table already loaded into namespace, just return */
-
- if (AcpiTbIsTableLoaded (TableIndex))
- {
- Status = AE_ALREADY_EXISTS;
- goto Unlock;
- }
-
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "**** Loading table into namespace ****\n"));
-
- Status = AcpiTbAllocateOwnerId (TableIndex);
- if (ACPI_FAILURE (Status))
- {
- goto Unlock;
- }
-
- /*
- * Parse the table and load the namespace with all named
- * objects found within. Control methods are NOT parsed
- * at this time. In fact, the control methods cannot be
- * parsed until the entire namespace is loaded, because
- * if a control method makes a forward reference (call)
- * to another control method, we can't continue parsing
- * because we don't know how many arguments to parse next!
- */
- Status = AcpiNsParseTable (TableIndex, Node);
- if (ACPI_SUCCESS (Status))
- {
- AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
- }
- else
- {
- /*
- * On error, delete any namespace objects created by this table.
- * We cannot initialize these objects, so delete them. There are
- * a couple of expecially bad cases:
- * AE_ALREADY_EXISTS - namespace collision.
- * AE_NOT_FOUND - the target of a Scope operator does not
- * exist. This target of Scope must already exist in the
- * namespace, as per the ACPI specification.
- */
- AcpiNsDeleteNamespaceByOwner (
- AcpiGbl_RootTableList.Tables[TableIndex].OwnerId);
-
- AcpiTbReleaseOwnerId (TableIndex);
- return_ACPI_STATUS (Status);
- }
-
-Unlock:
- if (ACPI_FAILURE (Status))
- {
- return_ACPI_STATUS (Status);
- }
-
- /*
- * Now we can parse the control methods. We always parse
- * them here for a sanity check, and if configured for
- * just-in-time parsing, we delete the control method
- * parse trees.
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "**** Begin Table Object Initialization\n"));
-
- AcpiExEnterInterpreter ();
- Status = AcpiDsInitializeObjects (TableIndex, Node);
- AcpiExExitInterpreter ();
-
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "**** Completed Table Object Initialization\n"));
-
- /*
- * Execute any module-level code that was detected during the table load
- * phase. Although illegal since ACPI 2.0, there are many machines that
- * contain this type of code. Each block of detected executable AML code
- * outside of any control method is wrapped with a temporary control
- * method object and placed on a global list. The methods on this list
- * are executed below.
- *
- * This case executes the module-level code for each table immediately
- * after the table has been loaded. This provides compatibility with
- * other ACPI implementations. Optionally, the execution can be deferred
- * until later, see AcpiInitializeObjects.
- */
- if (!AcpiGbl_ParseTableAsTermList && !AcpiGbl_GroupModuleLevelCode)
- {
- AcpiNsExecModuleCodeList ();
- }
-
- return_ACPI_STATUS (Status);
-}
-
-
-#ifdef ACPI_OBSOLETE_FUNCTIONS
-/*******************************************************************************
- *
- * FUNCTION: AcpiLoadNamespace
- *
- * PARAMETERS: None
- *
- * RETURN: Status
- *
- * DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
- * (DSDT points to either the BIOS or a buffer.)
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiNsLoadNamespace (
- void)
-{
- ACPI_STATUS Status;
-
-
- ACPI_FUNCTION_TRACE (AcpiLoadNameSpace);
-
-
- /* There must be at least a DSDT installed */
-
- if (AcpiGbl_DSDT == NULL)
- {
- ACPI_ERROR ((AE_INFO, "DSDT is not in memory"));
- return_ACPI_STATUS (AE_NO_ACPI_TABLES);
- }
-
- /*
- * Load the namespace. The DSDT is required,
- * but the SSDT and PSDT tables are optional.
- */
- Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT);
- if (ACPI_FAILURE (Status))
- {
- return_ACPI_STATUS (Status);
- }
-
- /* Ignore exceptions from these */
-
- (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT);
- (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT);
-
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
- "ACPI Namespace successfully loaded at root %p\n",
- AcpiGbl_RootNode));
-
- return_ACPI_STATUS (Status);
-}
-#endif
-
-#ifdef ACPI_FUTURE_IMPLEMENTATION
-/*******************************************************************************
- *
- * FUNCTION: AcpiNsDeleteSubtree
- *
- * PARAMETERS: StartHandle - Handle in namespace where search begins
- *
- * RETURNS Status
- *
- * DESCRIPTION: Walks the namespace starting at the given handle and deletes
- * all objects, entries, and scopes in the entire subtree.
- *
- * Namespace/Interpreter should be locked or the subsystem should
- * be in shutdown before this routine is called.
- *
- ******************************************************************************/
-
-static ACPI_STATUS
-AcpiNsDeleteSubtree (
- ACPI_HANDLE StartHandle)
-{
- ACPI_STATUS Status;
- ACPI_HANDLE ChildHandle;
- ACPI_HANDLE ParentHandle;
- ACPI_HANDLE NextChildHandle;
- ACPI_HANDLE Dummy;
- UINT32 Level;
-
-
- ACPI_FUNCTION_TRACE (NsDeleteSubtree);
-
-
- ParentHandle = StartHandle;
- ChildHandle = NULL;
- Level = 1;
-
- /*
- * Traverse the tree of objects until we bubble back up
- * to where we started.
- */
- while (Level > 0)
- {
- /* Attempt to get the next object in this scope */
-
- Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle,
- ChildHandle, &NextChildHandle);
-
- ChildHandle = NextChildHandle;
-
- /* Did we get a new object? */
-
- if (ACPI_SUCCESS (Status))
- {
- /* Check if this object has any children */
-
- if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle,
- NULL, &Dummy)))
- {
- /*
- * There is at least one child of this object,
- * visit the object
- */
- Level++;
- ParentHandle = ChildHandle;
- ChildHandle = NULL;
- }
- }
- else
- {
- /*
- * No more children in this object, go back up to
- * the object's parent
- */
- Level--;
-
- /* Delete all children now */
-
- AcpiNsDeleteChildren (ChildHandle);
-
- ChildHandle = ParentHandle;
- Status = AcpiGetParent (ParentHandle, &ParentHandle);
- if (ACPI_FAILURE (Status))
- {
- return_ACPI_STATUS (Status);
- }
- }
- }
-
- /* Now delete the starting object, and we are done */
-
- AcpiNsRemoveNode (ChildHandle);
- return_ACPI_STATUS (AE_OK);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiNsUnloadNameSpace
- *
- * PARAMETERS: Handle - Root of namespace subtree to be deleted
- *
- * RETURN: Status
- *
- * DESCRIPTION: Shrinks the namespace, typically in response to an undocking
- * event. Deletes an entire subtree starting from (and
- * including) the given handle.
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiNsUnloadNamespace (
- ACPI_HANDLE Handle)
-{
- ACPI_STATUS Status;
-
-
- ACPI_FUNCTION_TRACE (NsUnloadNameSpace);
-
-
- /* Parameter validation */
-
- if (!AcpiGbl_RootNode)
- {
- return_ACPI_STATUS (AE_NO_NAMESPACE);
- }
-
- if (!Handle)
- {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- /* This function does the real work */
-
- Status = AcpiNsDeleteSubtree (Handle);
- return_ACPI_STATUS (Status);
-}
-#endif
-#endif
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