9560b6dea8
- 99% of the code is Intel's ACPICA. The license is compliant with BSD and GNU and virtually all systems that use ACPI use this code, For instance it is part of the Linux kernel. - The only minix specific files are acpi.c osminixxf.c platform/acminix.h and include/minix/acpi.h - At the moment the driver does not register interrupt hooks which I believe is mainly for handling PnP, events like "battery level is low" and power management. Should not be difficult to add it if need be. - The interface to the outside world is virtually non-existent except a trivial message based service for PCI driver to query which device is connected to what IRQ line. This will evolve as more components start using this driver. VM, Scheduler and IOMMU are the possible users right now. - because of dependency on a native 64bit (long long, part of c99) it is compiled only with a gnu-like compilers which in case of Minix includes gcc llvm-gcc and clang
1060 lines
30 KiB
C
1060 lines
30 KiB
C
/******************************************************************************
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|
*
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* Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
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* parents and siblings and Scope manipulation
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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 - 2010, Intel Corp.
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* All rights reserved.
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*
|
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* 2. License
|
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*
|
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* 2.1. This is your license from Intel Corp. under its intellectual property
|
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* rights. You may have additional license terms from the party that provided
|
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* you this software, covering your right to use that party's intellectual
|
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* property rights.
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*
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* 2.2. 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") an
|
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
|
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
|
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with 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
|
|
* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is 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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*
|
|
* 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.
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|
*
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|
* 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
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* make.
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*
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|
* 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
|
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* provision in the documentation and/or other materials provided with the
|
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* distribution.
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*
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* 3.4. 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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* 3.5. 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,
|
|
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
|
|
* 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
|
|
* 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
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* any of its subsidiaries will export/re-export any technical data, process,
|
|
* software, or service, directly or indirectly, to any country for which the
|
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* United States government or any agency thereof requires an export license,
|
|
* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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|
*****************************************************************************/
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|
#define __NSUTILS_C__
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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 "amlcode.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsutils")
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/* Local prototypes */
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static BOOLEAN
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AcpiNsValidPathSeparator (
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char Sep);
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#ifdef ACPI_OBSOLETE_FUNCTIONS
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ACPI_NAME
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AcpiNsFindParentName (
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ACPI_NAMESPACE_NODE *NodeToSearch);
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#endif
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|
|
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsReportError
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*
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* PARAMETERS: ModuleName - Caller's module name (for error output)
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* LineNumber - Caller's line number (for error output)
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* InternalName - Name or path of the namespace node
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* LookupStatus - Exception code from NS lookup
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*
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* RETURN: None
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*
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* DESCRIPTION: Print warning message with full pathname
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*
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******************************************************************************/
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|
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void
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AcpiNsReportError (
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const char *ModuleName,
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UINT32 LineNumber,
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const char *InternalName,
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ACPI_STATUS LookupStatus)
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{
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ACPI_STATUS Status;
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UINT32 BadName;
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char *Name = NULL;
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AcpiOsPrintf ("ACPI Error (%s-%04d): ", ModuleName, LineNumber);
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if (LookupStatus == AE_BAD_CHARACTER)
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{
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/* There is a non-ascii character in the name */
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ACPI_MOVE_32_TO_32 (&BadName, ACPI_CAST_PTR (UINT32, InternalName));
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AcpiOsPrintf ("[0x%4.4X] (NON-ASCII)", BadName);
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}
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else
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{
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/* Convert path to external format */
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Status = AcpiNsExternalizeName (ACPI_UINT32_MAX,
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InternalName, NULL, &Name);
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/* Print target name */
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if (ACPI_SUCCESS (Status))
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{
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AcpiOsPrintf ("[%s]", Name);
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}
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else
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{
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AcpiOsPrintf ("[COULD NOT EXTERNALIZE NAME]");
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}
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if (Name)
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{
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ACPI_FREE (Name);
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}
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}
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AcpiOsPrintf (" Namespace lookup failure, %s\n",
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AcpiFormatException (LookupStatus));
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}
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|
|
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|
/*******************************************************************************
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*
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* FUNCTION: AcpiNsReportMethodError
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*
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* PARAMETERS: ModuleName - Caller's module name (for error output)
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* LineNumber - Caller's line number (for error output)
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* Message - Error message to use on failure
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* PrefixNode - Prefix relative to the path
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* Path - Path to the node (optional)
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* MethodStatus - Execution status
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*
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* RETURN: None
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*
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* DESCRIPTION: Print warning message with full pathname
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*
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******************************************************************************/
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|
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void
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AcpiNsReportMethodError (
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const char *ModuleName,
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UINT32 LineNumber,
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const char *Message,
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ACPI_NAMESPACE_NODE *PrefixNode,
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const char *Path,
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ACPI_STATUS MethodStatus)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node = PrefixNode;
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AcpiOsPrintf ("ACPI Error (%s-%04d): ", ModuleName, LineNumber);
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if (Path)
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{
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Status = AcpiNsGetNode (PrefixNode, Path, ACPI_NS_NO_UPSEARCH,
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&Node);
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if (ACPI_FAILURE (Status))
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{
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AcpiOsPrintf ("[Could not get node by pathname]");
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}
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}
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AcpiNsPrintNodePathname (Node, Message);
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AcpiOsPrintf (", %s\n", AcpiFormatException (MethodStatus));
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}
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|
|
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsPrintNodePathname
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*
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* PARAMETERS: Node - Object
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* Message - Prefix message
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*
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* DESCRIPTION: Print an object's full namespace pathname
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* Manages allocation/freeing of a pathname buffer
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*
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******************************************************************************/
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void
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AcpiNsPrintNodePathname (
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ACPI_NAMESPACE_NODE *Node,
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const char *Message)
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{
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ACPI_BUFFER Buffer;
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ACPI_STATUS Status;
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|
|
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if (!Node)
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{
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AcpiOsPrintf ("[NULL NAME]");
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return;
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}
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/* Convert handle to full pathname and print it (with supplied message) */
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Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
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Status = AcpiNsHandleToPathname (Node, &Buffer);
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if (ACPI_SUCCESS (Status))
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{
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if (Message)
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{
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AcpiOsPrintf ("%s ", Message);
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}
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AcpiOsPrintf ("[%s] (Node %p)", (char *) Buffer.Pointer, Node);
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ACPI_FREE (Buffer.Pointer);
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}
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}
|
|
|
|
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|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsValidRootPrefix
|
|
*
|
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* PARAMETERS: Prefix - Character to be checked
|
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*
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* RETURN: TRUE if a valid prefix
|
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*
|
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* DESCRIPTION: Check if a character is a valid ACPI Root prefix
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*
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******************************************************************************/
|
|
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|
BOOLEAN
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AcpiNsValidRootPrefix (
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char Prefix)
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{
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|
return ((BOOLEAN) (Prefix == '\\'));
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}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsValidPathSeparator
|
|
*
|
|
* PARAMETERS: Sep - Character to be checked
|
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*
|
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* RETURN: TRUE if a valid path separator
|
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*
|
|
* DESCRIPTION: Check if a character is a valid ACPI path separator
|
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*
|
|
******************************************************************************/
|
|
|
|
static BOOLEAN
|
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AcpiNsValidPathSeparator (
|
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char Sep)
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|
{
|
|
|
|
return ((BOOLEAN) (Sep == '.'));
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsGetType
|
|
*
|
|
* PARAMETERS: Node - Parent Node to be examined
|
|
*
|
|
* RETURN: Type field from Node whose handle is passed
|
|
*
|
|
* DESCRIPTION: Return the type of a Namespace node
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_OBJECT_TYPE
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AcpiNsGetType (
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ACPI_NAMESPACE_NODE *Node)
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|
{
|
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ACPI_FUNCTION_TRACE (NsGetType);
|
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|
|
|
|
if (!Node)
|
|
{
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ACPI_WARNING ((AE_INFO, "Null Node parameter"));
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return_UINT32 (ACPI_TYPE_ANY);
|
|
}
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|
|
return_UINT32 ((ACPI_OBJECT_TYPE) Node->Type);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsLocal
|
|
*
|
|
* PARAMETERS: Type - A namespace object type
|
|
*
|
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* RETURN: LOCAL if names must be found locally in objects of the
|
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* passed type, 0 if enclosing scopes should be searched
|
|
*
|
|
* DESCRIPTION: Returns scope rule for the given object type.
|
|
*
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|
******************************************************************************/
|
|
|
|
UINT32
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AcpiNsLocal (
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ACPI_OBJECT_TYPE Type)
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|
{
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|
ACPI_FUNCTION_TRACE (NsLocal);
|
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|
|
|
|
if (!AcpiUtValidObjectType (Type))
|
|
{
|
|
/* Type code out of range */
|
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|
|
ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X", Type));
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return_UINT32 (ACPI_NS_NORMAL);
|
|
}
|
|
|
|
return_UINT32 ((UINT32) AcpiGbl_NsProperties[Type] & ACPI_NS_LOCAL);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsGetInternalNameLength
|
|
*
|
|
* PARAMETERS: Info - Info struct initialized with the
|
|
* external name pointer.
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Calculate the length of the internal (AML) namestring
|
|
* corresponding to the external (ASL) namestring.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
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AcpiNsGetInternalNameLength (
|
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ACPI_NAMESTRING_INFO *Info)
|
|
{
|
|
const char *NextExternalChar;
|
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UINT32 i;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
NextExternalChar = Info->ExternalName;
|
|
Info->NumCarats = 0;
|
|
Info->NumSegments = 0;
|
|
Info->FullyQualified = FALSE;
|
|
|
|
/*
|
|
* For the internal name, the required length is 4 bytes per segment, plus
|
|
* 1 each for RootPrefix, MultiNamePrefixOp, segment count, trailing null
|
|
* (which is not really needed, but no there's harm in putting it there)
|
|
*
|
|
* strlen() + 1 covers the first NameSeg, which has no path separator
|
|
*/
|
|
if (AcpiNsValidRootPrefix (*NextExternalChar))
|
|
{
|
|
Info->FullyQualified = TRUE;
|
|
NextExternalChar++;
|
|
|
|
/* Skip redundant RootPrefix, like \\_SB.PCI0.SBRG.EC0 */
|
|
|
|
while (AcpiNsValidRootPrefix (*NextExternalChar))
|
|
{
|
|
NextExternalChar++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Handle Carat prefixes */
|
|
|
|
while (*NextExternalChar == '^')
|
|
{
|
|
Info->NumCarats++;
|
|
NextExternalChar++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Determine the number of ACPI name "segments" by counting the number of
|
|
* path separators within the string. Start with one segment since the
|
|
* segment count is [(# separators) + 1], and zero separators is ok.
|
|
*/
|
|
if (*NextExternalChar)
|
|
{
|
|
Info->NumSegments = 1;
|
|
for (i = 0; NextExternalChar[i]; i++)
|
|
{
|
|
if (AcpiNsValidPathSeparator (NextExternalChar[i]))
|
|
{
|
|
Info->NumSegments++;
|
|
}
|
|
}
|
|
}
|
|
|
|
Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) +
|
|
4 + Info->NumCarats;
|
|
|
|
Info->NextExternalChar = NextExternalChar;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsBuildInternalName
|
|
*
|
|
* PARAMETERS: Info - Info struct fully initialized
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Construct the internal (AML) namestring
|
|
* corresponding to the external (ASL) namestring.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsBuildInternalName (
|
|
ACPI_NAMESTRING_INFO *Info)
|
|
{
|
|
UINT32 NumSegments = Info->NumSegments;
|
|
char *InternalName = Info->InternalName;
|
|
const char *ExternalName = Info->NextExternalChar;
|
|
char *Result = NULL;
|
|
UINT32 i;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsBuildInternalName);
|
|
|
|
|
|
/* Setup the correct prefixes, counts, and pointers */
|
|
|
|
if (Info->FullyQualified)
|
|
{
|
|
InternalName[0] = '\\';
|
|
|
|
if (NumSegments <= 1)
|
|
{
|
|
Result = &InternalName[1];
|
|
}
|
|
else if (NumSegments == 2)
|
|
{
|
|
InternalName[1] = AML_DUAL_NAME_PREFIX;
|
|
Result = &InternalName[2];
|
|
}
|
|
else
|
|
{
|
|
InternalName[1] = AML_MULTI_NAME_PREFIX_OP;
|
|
InternalName[2] = (char) NumSegments;
|
|
Result = &InternalName[3];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Not fully qualified.
|
|
* Handle Carats first, then append the name segments
|
|
*/
|
|
i = 0;
|
|
if (Info->NumCarats)
|
|
{
|
|
for (i = 0; i < Info->NumCarats; i++)
|
|
{
|
|
InternalName[i] = '^';
|
|
}
|
|
}
|
|
|
|
if (NumSegments <= 1)
|
|
{
|
|
Result = &InternalName[i];
|
|
}
|
|
else if (NumSegments == 2)
|
|
{
|
|
InternalName[i] = AML_DUAL_NAME_PREFIX;
|
|
Result = &InternalName[(ACPI_SIZE) i+1];
|
|
}
|
|
else
|
|
{
|
|
InternalName[i] = AML_MULTI_NAME_PREFIX_OP;
|
|
InternalName[(ACPI_SIZE) i+1] = (char) NumSegments;
|
|
Result = &InternalName[(ACPI_SIZE) i+2];
|
|
}
|
|
}
|
|
|
|
/* Build the name (minus path separators) */
|
|
|
|
for (; NumSegments; NumSegments--)
|
|
{
|
|
for (i = 0; i < ACPI_NAME_SIZE; i++)
|
|
{
|
|
if (AcpiNsValidPathSeparator (*ExternalName) ||
|
|
(*ExternalName == 0))
|
|
{
|
|
/* Pad the segment with underscore(s) if segment is short */
|
|
|
|
Result[i] = '_';
|
|
}
|
|
else
|
|
{
|
|
/* Convert the character to uppercase and save it */
|
|
|
|
Result[i] = (char) ACPI_TOUPPER ((int) *ExternalName);
|
|
ExternalName++;
|
|
}
|
|
}
|
|
|
|
/* Now we must have a path separator, or the pathname is bad */
|
|
|
|
if (!AcpiNsValidPathSeparator (*ExternalName) &&
|
|
(*ExternalName != 0))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Move on the next segment */
|
|
|
|
ExternalName++;
|
|
Result += ACPI_NAME_SIZE;
|
|
}
|
|
|
|
/* Terminate the string */
|
|
|
|
*Result = 0;
|
|
|
|
if (Info->FullyQualified)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (abs) \"\\%s\"\n",
|
|
InternalName, InternalName));
|
|
}
|
|
else
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n",
|
|
InternalName, InternalName));
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsInternalizeName
|
|
*
|
|
* PARAMETERS: *ExternalName - External representation of name
|
|
* **Converted Name - Where to return the resulting
|
|
* internal represention of the name
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
|
|
* to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
|
|
*
|
|
*******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsInternalizeName (
|
|
const char *ExternalName,
|
|
char **ConvertedName)
|
|
{
|
|
char *InternalName;
|
|
ACPI_NAMESTRING_INFO Info;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsInternalizeName);
|
|
|
|
|
|
if ((!ExternalName) ||
|
|
(*ExternalName == 0) ||
|
|
(!ConvertedName))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Get the length of the new internal name */
|
|
|
|
Info.ExternalName = ExternalName;
|
|
AcpiNsGetInternalNameLength (&Info);
|
|
|
|
/* We need a segment to store the internal name */
|
|
|
|
InternalName = ACPI_ALLOCATE_ZEROED (Info.Length);
|
|
if (!InternalName)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Build the name */
|
|
|
|
Info.InternalName = InternalName;
|
|
Status = AcpiNsBuildInternalName (&Info);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_FREE (InternalName);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
*ConvertedName = InternalName;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsExternalizeName
|
|
*
|
|
* PARAMETERS: InternalNameLength - Lenth of the internal name below
|
|
* InternalName - Internal representation of name
|
|
* ConvertedNameLength - Where the length is returned
|
|
* ConvertedName - Where the resulting external name
|
|
* is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
|
|
* to its external (printable) form (e.g. "\_PR_.CPU0")
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsExternalizeName (
|
|
UINT32 InternalNameLength,
|
|
const char *InternalName,
|
|
UINT32 *ConvertedNameLength,
|
|
char **ConvertedName)
|
|
{
|
|
UINT32 NamesIndex = 0;
|
|
UINT32 NumSegments = 0;
|
|
UINT32 RequiredLength;
|
|
UINT32 PrefixLength = 0;
|
|
UINT32 i = 0;
|
|
UINT32 j = 0;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsExternalizeName);
|
|
|
|
|
|
if (!InternalNameLength ||
|
|
!InternalName ||
|
|
!ConvertedName)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Check for a prefix (one '\' | one or more '^') */
|
|
|
|
switch (InternalName[0])
|
|
{
|
|
case '\\':
|
|
PrefixLength = 1;
|
|
break;
|
|
|
|
case '^':
|
|
for (i = 0; i < InternalNameLength; i++)
|
|
{
|
|
if (InternalName[i] == '^')
|
|
{
|
|
PrefixLength = i + 1;
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == InternalNameLength)
|
|
{
|
|
PrefixLength = i;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check for object names. Note that there could be 0-255 of these
|
|
* 4-byte elements.
|
|
*/
|
|
if (PrefixLength < InternalNameLength)
|
|
{
|
|
switch (InternalName[PrefixLength])
|
|
{
|
|
case AML_MULTI_NAME_PREFIX_OP:
|
|
|
|
/* <count> 4-byte names */
|
|
|
|
NamesIndex = PrefixLength + 2;
|
|
NumSegments = (UINT8)
|
|
InternalName[(ACPI_SIZE) PrefixLength + 1];
|
|
break;
|
|
|
|
case AML_DUAL_NAME_PREFIX:
|
|
|
|
/* Two 4-byte names */
|
|
|
|
NamesIndex = PrefixLength + 1;
|
|
NumSegments = 2;
|
|
break;
|
|
|
|
case 0:
|
|
|
|
/* NullName */
|
|
|
|
NamesIndex = 0;
|
|
NumSegments = 0;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* one 4-byte name */
|
|
|
|
NamesIndex = PrefixLength;
|
|
NumSegments = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Calculate the length of ConvertedName, which equals the length
|
|
* of the prefix, length of all object names, length of any required
|
|
* punctuation ('.') between object names, plus the NULL terminator.
|
|
*/
|
|
RequiredLength = PrefixLength + (4 * NumSegments) +
|
|
((NumSegments > 0) ? (NumSegments - 1) : 0) + 1;
|
|
|
|
/*
|
|
* Check to see if we're still in bounds. If not, there's a problem
|
|
* with InternalName (invalid format).
|
|
*/
|
|
if (RequiredLength > InternalNameLength)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Invalid internal name"));
|
|
return_ACPI_STATUS (AE_BAD_PATHNAME);
|
|
}
|
|
|
|
/* Build the ConvertedName */
|
|
|
|
*ConvertedName = ACPI_ALLOCATE_ZEROED (RequiredLength);
|
|
if (!(*ConvertedName))
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
j = 0;
|
|
|
|
for (i = 0; i < PrefixLength; i++)
|
|
{
|
|
(*ConvertedName)[j++] = InternalName[i];
|
|
}
|
|
|
|
if (NumSegments > 0)
|
|
{
|
|
for (i = 0; i < NumSegments; i++)
|
|
{
|
|
if (i > 0)
|
|
{
|
|
(*ConvertedName)[j++] = '.';
|
|
}
|
|
|
|
(*ConvertedName)[j++] = InternalName[NamesIndex++];
|
|
(*ConvertedName)[j++] = InternalName[NamesIndex++];
|
|
(*ConvertedName)[j++] = InternalName[NamesIndex++];
|
|
(*ConvertedName)[j++] = InternalName[NamesIndex++];
|
|
}
|
|
}
|
|
|
|
if (ConvertedNameLength)
|
|
{
|
|
*ConvertedNameLength = (UINT32) RequiredLength;
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsValidateHandle
|
|
*
|
|
* PARAMETERS: Handle - Handle to be validated and typecast to a
|
|
* namespace node.
|
|
*
|
|
* RETURN: A pointer to a namespace node
|
|
*
|
|
* DESCRIPTION: Convert a namespace handle to a namespace node. Handles special
|
|
* cases for the root node.
|
|
*
|
|
* NOTE: Real integer handles would allow for more verification
|
|
* and keep all pointers within this subsystem - however this introduces
|
|
* more overhead and has not been necessary to this point. Drivers
|
|
* holding handles are typically notified before a node becomes invalid
|
|
* due to a table unload.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_NAMESPACE_NODE *
|
|
AcpiNsValidateHandle (
|
|
ACPI_HANDLE Handle)
|
|
{
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!Handle) || (Handle == ACPI_ROOT_OBJECT))
|
|
{
|
|
return (AcpiGbl_RootNode);
|
|
}
|
|
|
|
/* We can at least attempt to verify the handle */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (Handle) != ACPI_DESC_TYPE_NAMED)
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
return (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle));
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsTerminate
|
|
*
|
|
* PARAMETERS: none
|
|
*
|
|
* RETURN: none
|
|
*
|
|
* DESCRIPTION: free memory allocated for namespace and ACPI table storage.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiNsTerminate (
|
|
void)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsTerminate);
|
|
|
|
|
|
/*
|
|
* 1) Free the entire namespace -- all nodes and objects
|
|
*
|
|
* Delete all object descriptors attached to namepsace nodes
|
|
*/
|
|
AcpiNsDeleteNamespaceSubtree (AcpiGbl_RootNode);
|
|
|
|
/* Detach any objects attached to the root */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (AcpiGbl_RootNode);
|
|
if (ObjDesc)
|
|
{
|
|
AcpiNsDetachObject (AcpiGbl_RootNode);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n"));
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsOpensScope
|
|
*
|
|
* PARAMETERS: Type - A valid namespace type
|
|
*
|
|
* RETURN: NEWSCOPE if the passed type "opens a name scope" according
|
|
* to the ACPI specification, else 0
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT32
|
|
AcpiNsOpensScope (
|
|
ACPI_OBJECT_TYPE Type)
|
|
{
|
|
ACPI_FUNCTION_TRACE_STR (NsOpensScope, AcpiUtGetTypeName (Type));
|
|
|
|
|
|
if (!AcpiUtValidObjectType (Type))
|
|
{
|
|
/* type code out of range */
|
|
|
|
ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X", Type));
|
|
return_UINT32 (ACPI_NS_NORMAL);
|
|
}
|
|
|
|
return_UINT32 (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsGetNode
|
|
*
|
|
* PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The
|
|
* \ (backslash) and ^ (carat) prefixes, and the
|
|
* . (period) to separate segments are supported.
|
|
* PrefixNode - Root of subtree to be searched, or NS_ALL for the
|
|
* root of the name space. If Name is fully
|
|
* qualified (first INT8 is '\'), the passed value
|
|
* of Scope will not be accessed.
|
|
* Flags - Used to indicate whether to perform upsearch or
|
|
* not.
|
|
* ReturnNode - Where the Node is returned
|
|
*
|
|
* DESCRIPTION: Look up a name relative to a given scope and return the
|
|
* corresponding Node. NOTE: Scope can be null.
|
|
*
|
|
* MUTEX: Locks namespace
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsGetNode (
|
|
ACPI_NAMESPACE_NODE *PrefixNode,
|
|
const char *Pathname,
|
|
UINT32 Flags,
|
|
ACPI_NAMESPACE_NODE **ReturnNode)
|
|
{
|
|
ACPI_GENERIC_STATE ScopeInfo;
|
|
ACPI_STATUS Status;
|
|
char *InternalPath;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (NsGetNode, ACPI_CAST_PTR (char, Pathname));
|
|
|
|
|
|
if (!Pathname)
|
|
{
|
|
*ReturnNode = PrefixNode;
|
|
if (!PrefixNode)
|
|
{
|
|
*ReturnNode = AcpiGbl_RootNode;
|
|
}
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/* Convert path to internal representation */
|
|
|
|
Status = AcpiNsInternalizeName (Pathname, &InternalPath);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Must lock namespace during lookup */
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Setup lookup scope (search starting point) */
|
|
|
|
ScopeInfo.Scope.Node = PrefixNode;
|
|
|
|
/* Lookup the name in the namespace */
|
|
|
|
Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY,
|
|
ACPI_IMODE_EXECUTE, (Flags | ACPI_NS_DONT_OPEN_SCOPE),
|
|
NULL, ReturnNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s, %s\n",
|
|
Pathname, AcpiFormatException (Status)));
|
|
}
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
Cleanup:
|
|
ACPI_FREE (InternalPath);
|
|
return_ACPI_STATUS (Status);
|
|
}
|