- 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
558 lines
19 KiB
C
558 lines
19 KiB
C
/*******************************************************************************
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*
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* Module Name: nseval - Object evaluation, includes control method execution
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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 __NSEVAL_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acparser.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nseval")
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/* Local prototypes */
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static void
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AcpiNsExecModuleCode (
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ACPI_OPERAND_OBJECT *MethodObj,
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ACPI_EVALUATE_INFO *Info);
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsEvaluate
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*
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* PARAMETERS: Info - Evaluation info block, contains:
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* PrefixNode - Prefix or Method/Object Node to execute
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* Pathname - Name of method to execute, If NULL, the
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* Node is the object to execute
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* Parameters - List of parameters to pass to the method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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* ReturnObject - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* ParameterType - Type of Parameter list
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* ReturnObject - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* Flags - ACPI_IGNORE_RETURN_VALUE to delete return
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a control method or return the current value of an
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* ACPI namespace object.
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*
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* MUTEX: Locks interpreter
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsEvaluate (
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ACPI_EVALUATE_INFO *Info)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_FUNCTION_TRACE (NsEvaluate);
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if (!Info)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Initialize the return value to an invalid object */
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Info->ReturnObject = NULL;
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Info->ParamCount = 0;
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/*
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* Get the actual namespace node for the target object. Handles these cases:
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*
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* 1) Null node, Pathname (absolute path)
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* 2) Node, Pathname (path relative to Node)
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* 3) Node, Null Pathname
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*/
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Status = AcpiNsGetNode (Info->PrefixNode, Info->Pathname,
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ACPI_NS_NO_UPSEARCH, &Info->ResolvedNode);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/*
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* For a method alias, we must grab the actual method node so that proper
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* scoping context will be established before execution.
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*/
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if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
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{
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Info->ResolvedNode =
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ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Info->ResolvedNode->Object);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", Info->Pathname,
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Info->ResolvedNode, AcpiNsGetAttachedObject (Info->ResolvedNode)));
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Node = Info->ResolvedNode;
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/*
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* Two major cases here:
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*
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* 1) The object is a control method -- execute it
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* 2) The object is not a method -- just return it's current value
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*/
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if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_METHOD)
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{
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/*
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* 1) Object is a control method - execute it
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*/
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/* Verify that there is a method object associated with this node */
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Info->ObjDesc = AcpiNsGetAttachedObject (Info->ResolvedNode);
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if (!Info->ObjDesc)
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{
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ACPI_ERROR ((AE_INFO, "Control method has no attached sub-object"));
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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/* Count the number of arguments being passed to the method */
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if (Info->Parameters)
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{
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while (Info->Parameters[Info->ParamCount])
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{
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if (Info->ParamCount > ACPI_METHOD_MAX_ARG)
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{
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return_ACPI_STATUS (AE_LIMIT);
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}
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Info->ParamCount++;
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}
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}
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ACPI_DUMP_PATHNAME (Info->ResolvedNode, "ACPI: Execute Method",
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ACPI_LV_INFO, _COMPONENT);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Method at AML address %p Length %X\n",
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Info->ObjDesc->Method.AmlStart + 1,
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Info->ObjDesc->Method.AmlLength - 1));
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/*
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* Any namespace deletion must acquire both the namespace and
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* interpreter locks to ensure that no thread is using the portion of
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* the namespace that is being deleted.
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*
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* Execute the method via the interpreter. The interpreter is locked
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* here before calling into the AML parser
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*/
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AcpiExEnterInterpreter ();
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Status = AcpiPsExecuteMethod (Info);
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AcpiExExitInterpreter ();
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}
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else
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{
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/*
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* 2) Object is not a method, return its current value
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*
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* Disallow certain object types. For these, "evaluation" is undefined.
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*/
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switch (Info->ResolvedNode->Type)
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{
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_EVENT:
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case ACPI_TYPE_MUTEX:
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case ACPI_TYPE_REGION:
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case ACPI_TYPE_THERMAL:
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case ACPI_TYPE_LOCAL_SCOPE:
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ACPI_ERROR ((AE_INFO,
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"[%4.4s] Evaluation of object type [%s] is not supported",
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Info->ResolvedNode->Name.Ascii,
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AcpiUtGetTypeName (Info->ResolvedNode->Type)));
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return_ACPI_STATUS (AE_TYPE);
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default:
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break;
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}
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/*
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* Objects require additional resolution steps (e.g., the Node may be
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* a field that must be read, etc.) -- we can't just grab the object
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* out of the node.
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*
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* Use ResolveNodeToValue() to get the associated value.
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*
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* NOTE: we can get away with passing in NULL for a walk state because
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* ResolvedNode is guaranteed to not be a reference to either a method
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* local or a method argument (because this interface is never called
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* from a running method.)
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*
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* Even though we do not directly invoke the interpreter for object
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* resolution, we must lock it because we could access an opregion.
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* The opregion access code assumes that the interpreter is locked.
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*/
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AcpiExEnterInterpreter ();
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/* Function has a strange interface */
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Status = AcpiExResolveNodeToValue (&Info->ResolvedNode, NULL);
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AcpiExExitInterpreter ();
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/*
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* If AcpiExResolveNodeToValue() succeeded, the return value was placed
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* in ResolvedNode.
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*/
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if (ACPI_SUCCESS (Status))
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{
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Status = AE_CTRL_RETURN_VALUE;
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Info->ReturnObject =
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ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->ResolvedNode);
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returning object %p [%s]\n",
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Info->ReturnObject,
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AcpiUtGetObjectTypeName (Info->ReturnObject)));
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}
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}
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/*
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* Check input argument count against the ASL-defined count for a method.
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* Also check predefined names: argument count and return value against
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* the ACPI specification. Some incorrect return value types are repaired.
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*/
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(void) AcpiNsCheckPredefinedNames (Node, Info->ParamCount,
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Status, &Info->ReturnObject);
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/* Check if there is a return value that must be dealt with */
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|
if (Status == AE_CTRL_RETURN_VALUE)
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{
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/* If caller does not want the return value, delete it */
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if (Info->Flags & ACPI_IGNORE_RETURN_VALUE)
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{
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AcpiUtRemoveReference (Info->ReturnObject);
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Info->ReturnObject = NULL;
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}
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/* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
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Status = AE_OK;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"*** Completed evaluation of object %s ***\n", Info->Pathname));
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/*
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* Namespace was unlocked by the handling AcpiNs* function, so we
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* just return
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*/
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return_ACPI_STATUS (Status);
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}
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|
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsExecModuleCodeList
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*
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* PARAMETERS: None
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*
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* RETURN: None. Exceptions during method execution are ignored, since
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* we cannot abort a table load.
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*
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* DESCRIPTION: Execute all elements of the global module-level code list.
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* Each element is executed as a single control method.
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*
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******************************************************************************/
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void
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AcpiNsExecModuleCodeList (
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void)
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{
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ACPI_OPERAND_OBJECT *Prev;
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ACPI_OPERAND_OBJECT *Next;
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ACPI_EVALUATE_INFO *Info;
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UINT32 MethodCount = 0;
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|
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ACPI_FUNCTION_TRACE (NsExecModuleCodeList);
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|
|
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/* Exit now if the list is empty */
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Next = AcpiGbl_ModuleCodeList;
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if (!Next)
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{
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return_VOID;
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}
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|
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/* Allocate the evaluation information block */
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|
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Info = ACPI_ALLOCATE (sizeof (ACPI_EVALUATE_INFO));
|
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if (!Info)
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{
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return_VOID;
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}
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|
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/* Walk the list, executing each "method" */
|
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|
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while (Next)
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{
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Prev = Next;
|
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Next = Next->Method.Mutex;
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|
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/* Clear the link field and execute the method */
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|
|
Prev->Method.Mutex = NULL;
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AcpiNsExecModuleCode (Prev, Info);
|
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MethodCount++;
|
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|
|
/* Delete the (temporary) method object */
|
|
|
|
AcpiUtRemoveReference (Prev);
|
|
}
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|
|
ACPI_INFO ((AE_INFO,
|
|
"Executed %u blocks of module-level executable AML code",
|
|
MethodCount));
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|
|
ACPI_FREE (Info);
|
|
AcpiGbl_ModuleCodeList = NULL;
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsExecModuleCode
|
|
*
|
|
* PARAMETERS: MethodObj - Object container for the module-level code
|
|
* Info - Info block for method evaluation
|
|
*
|
|
* RETURN: None. Exceptions during method execution are ignored, since
|
|
* we cannot abort a table load.
|
|
*
|
|
* DESCRIPTION: Execute a control method containing a block of module-level
|
|
* executable AML code. The control method is temporarily
|
|
* installed to the root node, then evaluated.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiNsExecModuleCode (
|
|
ACPI_OPERAND_OBJECT *MethodObj,
|
|
ACPI_EVALUATE_INFO *Info)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ParentObj;
|
|
ACPI_NAMESPACE_NODE *ParentNode;
|
|
ACPI_OBJECT_TYPE Type;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsExecModuleCode);
|
|
|
|
|
|
/*
|
|
* Get the parent node. We cheat by using the NextObject field
|
|
* of the method object descriptor.
|
|
*/
|
|
ParentNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
|
|
MethodObj->Method.NextObject);
|
|
Type = AcpiNsGetType (ParentNode);
|
|
|
|
/*
|
|
* Get the region handler and save it in the method object. We may need
|
|
* this if an operation region declaration causes a _REG method to be run.
|
|
*
|
|
* We can't do this in AcpiPsLinkModuleCode because
|
|
* AcpiGbl_RootNode->Object is NULL at PASS1.
|
|
*/
|
|
if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object)
|
|
{
|
|
MethodObj->Method.Extra.Handler =
|
|
ParentNode->Object->Device.Handler;
|
|
}
|
|
|
|
/* Must clear NextObject (AcpiNsAttachObject needs the field) */
|
|
|
|
MethodObj->Method.NextObject = NULL;
|
|
|
|
/* Initialize the evaluation information block */
|
|
|
|
ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO));
|
|
Info->PrefixNode = ParentNode;
|
|
|
|
/*
|
|
* Get the currently attached parent object. Add a reference, because the
|
|
* ref count will be decreased when the method object is installed to
|
|
* the parent node.
|
|
*/
|
|
ParentObj = AcpiNsGetAttachedObject (ParentNode);
|
|
if (ParentObj)
|
|
{
|
|
AcpiUtAddReference (ParentObj);
|
|
}
|
|
|
|
/* Install the method (module-level code) in the parent node */
|
|
|
|
Status = AcpiNsAttachObject (ParentNode, MethodObj,
|
|
ACPI_TYPE_METHOD);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
/* Execute the parent node as a control method */
|
|
|
|
Status = AcpiNsEvaluate (Info);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Executed module-level code at %p\n",
|
|
MethodObj->Method.AmlStart));
|
|
|
|
/* Delete a possible implicit return value (in slack mode) */
|
|
|
|
if (Info->ReturnObject)
|
|
{
|
|
AcpiUtRemoveReference (Info->ReturnObject);
|
|
}
|
|
|
|
/* Detach the temporary method object */
|
|
|
|
AcpiNsDetachObject (ParentNode);
|
|
|
|
/* Restore the original parent object */
|
|
|
|
if (ParentObj)
|
|
{
|
|
Status = AcpiNsAttachObject (ParentNode, ParentObj, Type);
|
|
}
|
|
else
|
|
{
|
|
ParentNode->Type = (UINT8) Type;
|
|
}
|
|
|
|
Exit:
|
|
if (ParentObj)
|
|
{
|
|
AcpiUtRemoveReference (ParentObj);
|
|
}
|
|
return_VOID;
|
|
}
|
|
|