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
497 lines
18 KiB
C
497 lines
18 KiB
C
/*******************************************************************************
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*
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* Module Name: nssearch - Namespace search
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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
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* 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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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* 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.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* 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
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* substantial portion of the Covered Code or modification must reproduce the
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* 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,
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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
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* 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,
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* 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,
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* 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 __NSSEARCH_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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#ifdef ACPI_ASL_COMPILER
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#include "amlcode.h"
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#endif
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nssearch")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiNsSearchParentTree (
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UINT32 TargetName,
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ACPI_NAMESPACE_NODE *Node,
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ACPI_OBJECT_TYPE Type,
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ACPI_NAMESPACE_NODE **ReturnNode);
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsSearchOneScope
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*
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* PARAMETERS: TargetName - Ascii ACPI name to search for
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* ParentNode - Starting node where search will begin
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* Type - Object type to match
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* ReturnNode - Where the matched Named obj is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Search a single level of the namespace. Performs a
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* simple search of the specified level, and does not add
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* entries or search parents.
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*
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*
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* Named object lists are built (and subsequently dumped) in the
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* order in which the names are encountered during the namespace load;
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*
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* All namespace searching is linear in this implementation, but
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* could be easily modified to support any improved search
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* algorithm. However, the linear search was chosen for simplicity
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* and because the trees are small and the other interpreter
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* execution overhead is relatively high.
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*
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* Note: CPU execution analysis has shown that the AML interpreter spends
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* a very small percentage of its time searching the namespace. Therefore,
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* the linear search seems to be sufficient, as there would seem to be
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* little value in improving the search.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsSearchOneScope (
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UINT32 TargetName,
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ACPI_NAMESPACE_NODE *ParentNode,
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ACPI_OBJECT_TYPE Type,
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ACPI_NAMESPACE_NODE **ReturnNode)
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{
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ACPI_NAMESPACE_NODE *Node;
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ACPI_FUNCTION_TRACE (NsSearchOneScope);
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#ifdef ACPI_DEBUG_OUTPUT
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if (ACPI_LV_NAMES & AcpiDbgLevel)
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{
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char *ScopeName;
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ScopeName = AcpiNsGetExternalPathname (ParentNode);
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if (ScopeName)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Searching %s (%p) For [%4.4s] (%s)\n",
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ScopeName, ParentNode, ACPI_CAST_PTR (char, &TargetName),
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AcpiUtGetTypeName (Type)));
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ACPI_FREE (ScopeName);
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}
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}
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#endif
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/*
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* Search for name at this namespace level, which is to say that we
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* must search for the name among the children of this object
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*/
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Node = ParentNode->Child;
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while (Node)
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{
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/* Check for match against the name */
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if (Node->Name.Integer == TargetName)
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{
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/* Resolve a control method alias if any */
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if (AcpiNsGetType (Node) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
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{
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Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object);
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}
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/* Found matching entry */
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Name [%4.4s] (%s) %p found in scope [%4.4s] %p\n",
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ACPI_CAST_PTR (char, &TargetName),
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AcpiUtGetTypeName (Node->Type),
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Node, AcpiUtGetNodeName (ParentNode), ParentNode));
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*ReturnNode = Node;
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return_ACPI_STATUS (AE_OK);
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}
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/* Didn't match name, move on to the next peer object */
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Node = Node->Peer;
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}
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/* Searched entire namespace level, not found */
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Name [%4.4s] (%s) not found in search in scope [%4.4s] "
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"%p first child %p\n",
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ACPI_CAST_PTR (char, &TargetName), AcpiUtGetTypeName (Type),
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AcpiUtGetNodeName (ParentNode), ParentNode, ParentNode->Child));
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return_ACPI_STATUS (AE_NOT_FOUND);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsSearchParentTree
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*
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* PARAMETERS: TargetName - Ascii ACPI name to search for
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* Node - Starting node where search will begin
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* Type - Object type to match
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* ReturnNode - Where the matched Node is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Called when a name has not been found in the current namespace
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* level. Before adding it or giving up, ACPI scope rules require
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* searching enclosing scopes in cases identified by AcpiNsLocal().
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*
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* "A name is located by finding the matching name in the current
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* name space, and then in the parent name space. If the parent
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* name space does not contain the name, the search continues
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* recursively until either the name is found or the name space
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* does not have a parent (the root of the name space). This
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* indicates that the name is not found" (From ACPI Specification,
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* section 5.3)
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiNsSearchParentTree (
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UINT32 TargetName,
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ACPI_NAMESPACE_NODE *Node,
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ACPI_OBJECT_TYPE Type,
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ACPI_NAMESPACE_NODE **ReturnNode)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *ParentNode;
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ACPI_FUNCTION_TRACE (NsSearchParentTree);
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ParentNode = Node->Parent;
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/*
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* If there is no parent (i.e., we are at the root) or type is "local",
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* we won't be searching the parent tree.
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*/
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if (!ParentNode)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "[%4.4s] has no parent\n",
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ACPI_CAST_PTR (char, &TargetName)));
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return_ACPI_STATUS (AE_NOT_FOUND);
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}
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if (AcpiNsLocal (Type))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"[%4.4s] type [%s] must be local to this scope (no parent search)\n",
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ACPI_CAST_PTR (char, &TargetName), AcpiUtGetTypeName (Type)));
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return_ACPI_STATUS (AE_NOT_FOUND);
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}
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/* Search the parent tree */
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Searching parent [%4.4s] for [%4.4s]\n",
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AcpiUtGetNodeName (ParentNode), ACPI_CAST_PTR (char, &TargetName)));
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/* Search parents until target is found or we have backed up to the root */
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while (ParentNode)
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{
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/*
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* Search parent scope. Use TYPE_ANY because we don't care about the
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* object type at this point, we only care about the existence of
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* the actual name we are searching for. Typechecking comes later.
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*/
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Status = AcpiNsSearchOneScope (
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TargetName, ParentNode, ACPI_TYPE_ANY, ReturnNode);
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if (ACPI_SUCCESS (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Not found here, go up another level (until we reach the root) */
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ParentNode = ParentNode->Parent;
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}
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/* Not found in parent tree */
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return_ACPI_STATUS (AE_NOT_FOUND);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsSearchAndEnter
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*
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* PARAMETERS: TargetName - Ascii ACPI name to search for (4 chars)
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* WalkState - Current state of the walk
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* Node - Starting node where search will begin
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* InterpreterMode - Add names only in ACPI_MODE_LOAD_PASS_x.
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* Otherwise,search only.
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* Type - Object type to match
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* Flags - Flags describing the search restrictions
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* ReturnNode - Where the Node is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Search for a name segment in a single namespace level,
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* optionally adding it if it is not found. If the passed
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* Type is not Any and the type previously stored in the
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* entry was Any (i.e. unknown), update the stored type.
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*
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* In ACPI_IMODE_EXECUTE, search only.
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* In other modes, search and add if not found.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsSearchAndEnter (
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UINT32 TargetName,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *Node,
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ACPI_INTERPRETER_MODE InterpreterMode,
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ACPI_OBJECT_TYPE Type,
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UINT32 Flags,
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ACPI_NAMESPACE_NODE **ReturnNode)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *NewNode;
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ACPI_FUNCTION_TRACE (NsSearchAndEnter);
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/* Parameter validation */
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if (!Node || !TargetName || !ReturnNode)
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{
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ACPI_ERROR ((AE_INFO,
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"Null parameter: Node %p Name 0x%X ReturnNode %p",
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Node, TargetName, ReturnNode));
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* Name must consist of valid ACPI characters. We will repair the name if
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* necessary because we don't want to abort because of this, but we want
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* all namespace names to be printable. A warning message is appropriate.
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*
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* This issue came up because there are in fact machines that exhibit
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* this problem, and we want to be able to enable ACPI support for them,
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* even though there are a few bad names.
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*/
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AcpiUtRepairName (ACPI_CAST_PTR (char, &TargetName));
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/* Try to find the name in the namespace level specified by the caller */
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*ReturnNode = ACPI_ENTRY_NOT_FOUND;
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Status = AcpiNsSearchOneScope (TargetName, Node, Type, ReturnNode);
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if (Status != AE_NOT_FOUND)
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{
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/*
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* If we found it AND the request specifies that a find is an error,
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* return the error
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*/
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if ((Status == AE_OK) &&
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(Flags & ACPI_NS_ERROR_IF_FOUND))
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{
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Status = AE_ALREADY_EXISTS;
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}
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#ifdef ACPI_ASL_COMPILER
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if (*ReturnNode && (*ReturnNode)->Type == ACPI_TYPE_ANY)
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{
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(*ReturnNode)->Flags |= ANOBJ_IS_EXTERNAL;
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}
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#endif
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/* Either found it or there was an error: finished either way */
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return_ACPI_STATUS (Status);
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}
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/*
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* The name was not found. If we are NOT performing the first pass
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* (name entry) of loading the namespace, search the parent tree (all the
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* way to the root if necessary.) We don't want to perform the parent
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* search when the namespace is actually being loaded. We want to perform
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* the search when namespace references are being resolved (load pass 2)
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* and during the execution phase.
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*/
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if ((InterpreterMode != ACPI_IMODE_LOAD_PASS1) &&
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(Flags & ACPI_NS_SEARCH_PARENT))
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{
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/*
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* Not found at this level - search parent tree according to the
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* ACPI specification
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*/
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Status = AcpiNsSearchParentTree (TargetName, Node, Type, ReturnNode);
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if (ACPI_SUCCESS (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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/* In execute mode, just search, never add names. Exit now */
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if (InterpreterMode == ACPI_IMODE_EXECUTE)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"%4.4s Not found in %p [Not adding]\n",
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ACPI_CAST_PTR (char, &TargetName), Node));
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return_ACPI_STATUS (AE_NOT_FOUND);
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}
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/* Create the new named object */
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NewNode = AcpiNsCreateNode (TargetName);
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if (!NewNode)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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#ifdef ACPI_ASL_COMPILER
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/* Node is an object defined by an External() statement */
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if (Flags & ACPI_NS_EXTERNAL ||
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(WalkState && WalkState->Opcode == AML_SCOPE_OP))
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{
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NewNode->Flags |= ANOBJ_IS_EXTERNAL;
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}
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#endif
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if (Flags & ACPI_NS_TEMPORARY)
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{
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NewNode->Flags |= ANOBJ_TEMPORARY;
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}
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/* Install the new object into the parent's list of children */
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AcpiNsInstallNode (WalkState, Node, NewNode, Type);
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*ReturnNode = NewNode;
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return_ACPI_STATUS (AE_OK);
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}
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