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https://github.com/acpica/acpica/
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303 lines
10 KiB
C
303 lines
10 KiB
C
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/******************************************************************************
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*
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* Module Name: nsapinam - Public interfaces to the ACPI subsystem
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* ACPI Name oriented interfaces
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
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* reserved.
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*
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* 2. License
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*
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* 2.1. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") a license
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* under Intel's copyrights in the base code distributed originally by Intel
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* ("Original Intel Code") to copy, make derivatives, distribute, use and
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* display any portion of the Covered Code in any form; and
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*
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* 2.2. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (without the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions to
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* or modifications of the Original Intel Code. No other license or right is
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* granted directly or by implication, estoppel or otherwise;
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*
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* the above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of source code of any substantial portion of the Covered
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* Code or modification must include the above Copyright Notice, the above
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* License, this list of Conditions, and the following Disclaimer and Export
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* Compliance provision. In addition, Licensee must cause all Covered Code to
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* which Licensee contributes to contain a file documenting the changes
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* Licensee made to create that Covered Code and the date of any change.
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* Licensee must include in that file the documentation of any changes made by
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* any predecessor Licensee. Licensee must include a prominent statement that
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* the modification is derived, directly or indirectly, from Original Intel
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* Code.
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*
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* 3.2. Redistribution in binary form of any substantial portion of the Covered
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* Code or modification must reproduce the above Copyright Notice, and the
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* following Disclaimer and Export Compliance provision in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3.3. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.4. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or re-
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* exports any such software from a foreign destination, Licensee shall ensure
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* that the distribution and export/re-export of the software is in compliance
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* with all laws, regulations, orders, or other restrictions of the U.S. Export
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* Administration Regulations. Licensee agrees that neither it nor any of its
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* subsidiaries will export/re-export any technical data, process, software, or
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* service, directly or indirectly, to any country for which the United States
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* government or any agency thereof requires an export license, other
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* governmental approval, or letter of assurance, without first obtaining such
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* license, approval or letter.
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*
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*****************************************************************************/
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#define __NSAPINAM_C__
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#include <acpi.h>
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#include <interpreter.h>
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#include <namespace.h>
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#include <methods.h>
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#include <acpiobj.h>
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#include <pnp.h>
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#define _THIS_MODULE "nsapinam.c"
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#define _COMPONENT NAMESPACE
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/****************************************************************************
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*
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* FUNCTION: AcpiNameToHandle
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*
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* PARAMETERS: Scope - Handle for a search scope.
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* Name - Pointer to an ascii string containing the name
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* RetHandle - Where the return handle is placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine will search for a caller specified name in the
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* name space. The caller can restrict the search region by
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* specifying a non NULL scope. The Scope value is itself a namespace
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* handle. If the scope value is NULL or the NsName specified is
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* fully qualified, teh Scope value is ignored.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNameToHandle (
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ACPI_HANDLE Scope,
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UINT32 Name,
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ACPI_HANDLE *RetHandle)
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{
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NAME_TABLE_ENTRY *ThisEntry;
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ACPI_HANDLE LocalScope = Scope;
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if (!RetHandle)
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{
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return AE_BAD_PARAMETER;
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}
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/* Special case for root, since we can't search for it */
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if (Name == NS_ROOT)
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{
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*RetHandle = RootObject;
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return AE_OK;
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}
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/* Null scope means root scope */
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if (!Scope)
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{
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LocalScope = RootObject->Scope;
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}
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/* Validate the scope handle */
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if (!(ThisEntry = NsConvertHandleToEntry (LocalScope)))
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{
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return AE_BAD_PARAMETER;
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}
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/* Search for the name within this scope */
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while (ThisEntry)
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{
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if (ThisEntry->Name == Name)
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{
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*RetHandle = ThisEntry;
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return AE_OK;
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}
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ThisEntry = ThisEntry->NextEntry;
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}
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*RetHandle = NULL;
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return AE_NOT_FOUND;
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}
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/****************************************************************************
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*
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* FUNCTION: AcpiHandleToName
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*
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* PARAMETERS: Handle - Handle to be converted to a name
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* RetName - Where the 4 char (UINT32) name is placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine returns the name associated with ACPI_HANDLE. This
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* and the AcpiNameToHandle are complementary functions.
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*
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* Handle == AcpiNameToHandle(AcpiHandleToName(Handle))
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* and
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* Name == AcpiHandleToName(AcpiNameToHandle(Name, NULL))
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHandleToName (
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ACPI_HANDLE Handle,
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UINT32 *RetName)
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{
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NAME_TABLE_ENTRY *ObjEntry;
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if (!RetName)
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{
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return AE_BAD_PARAMETER;
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}
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/* Validate handle and convert to and NTE */
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if (!(ObjEntry = NsConvertHandleToEntry (Handle)))
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{
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*RetName = 0;
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return AE_BAD_PARAMETER;
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}
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/* Just extract the name field */
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*RetName = ObjEntry->Name;
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return AE_OK;
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}
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/****************************************************************************
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*
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* FUNCTION: AcpiPathnameToHandle
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*
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* PARAMETERS: Pathname - pointer to ascii string containing full pathname
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* RetHandle - Where the return handle is stored
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine will search for a caller specified name in the
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* name space. The pathname provided must be a fully qualified
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* path from the root of the namespace.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiPathnameToHandle (
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char *Pathname,
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ACPI_HANDLE *RetHandle)
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{
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if (!RetHandle || !Pathname)
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{
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return AE_BAD_PARAMETER;
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}
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/* Special case for root, since we can't search for it */
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if (strcmp (Pathname, NS_ROOT_PATH) == 0)
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{
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*RetHandle = RootObject;
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return AE_OK;
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}
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*RetHandle = NULL;
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return (NsGetHandle (Pathname, NS_ALL, RetHandle));
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}
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/****************************************************************************
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*
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* FUNCTION: AcpiHandleToPathname
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*
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* PARAMETERS: Handle - Handle to be converted to a pathname
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* RetPathPtr - Buffer for returned path
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*
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* RETURN: pointer to a string containing the fully qualified Name.
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*
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* DESCRIPTION: This routine returns the fully qualified name associated with
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* the Handle parameter. This and the AcpiPathnameToHandle are
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* complementary functions.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHandleToPathname (
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ACPI_HANDLE Handle,
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ACPI_BUFFER *RetPathPtr)
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{
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if ((!RetPathPtr->BufferPtr) ||
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(!RetPathPtr->Length))
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{
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return AE_BAD_PARAMETER;
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}
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return (NsHandleToPathname (Handle, RetPathPtr->Length, RetPathPtr->BufferPtr));
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}
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