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
653 lines
21 KiB
C
653 lines
21 KiB
C
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/******************************************************************************
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*
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* Module Name: exresolv - AML Interpreter object resolution
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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 __EXRESOLV_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "amlcode.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exresolv")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiExResolveObjectToValue (
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ACPI_OPERAND_OBJECT **StackPtr,
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ACPI_WALK_STATE *WalkState);
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/*******************************************************************************
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*
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* FUNCTION: AcpiExResolveToValue
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*
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* PARAMETERS: **StackPtr - Points to entry on ObjStack, which can
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* be either an (ACPI_OPERAND_OBJECT *)
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* or an ACPI_HANDLE.
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* WalkState - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert Reference objects to values
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExResolveToValue (
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ACPI_OPERAND_OBJECT **StackPtr,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE_PTR (ExResolveToValue, StackPtr);
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if (!StackPtr || !*StackPtr)
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{
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ACPI_ERROR ((AE_INFO, "Internal - null pointer"));
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/*
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* The entity pointed to by the StackPtr can be either
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* 1) A valid ACPI_OPERAND_OBJECT, or
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* 2) A ACPI_NAMESPACE_NODE (NamedObj)
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND)
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{
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Status = AcpiExResolveObjectToValue (StackPtr, WalkState);
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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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if (!*StackPtr)
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{
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ACPI_ERROR ((AE_INFO, "Internal - null pointer"));
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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}
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/*
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* Object on the stack may have changed if AcpiExResolveObjectToValue()
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* was called (i.e., we can't use an _else_ here.)
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED)
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{
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Status = AcpiExResolveNodeToValue (
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ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr),
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WalkState);
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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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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr));
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExResolveObjectToValue
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*
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* PARAMETERS: StackPtr - Pointer to an internal object
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* WalkState - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Retrieve the value from an internal object. The Reference type
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* uses the associated AML opcode to determine the value.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiExResolveObjectToValue (
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ACPI_OPERAND_OBJECT **StackPtr,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *StackDesc;
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ACPI_OPERAND_OBJECT *ObjDesc = NULL;
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UINT8 RefType;
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ACPI_FUNCTION_TRACE (ExResolveObjectToValue);
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StackDesc = *StackPtr;
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/* This is an ACPI_OPERAND_OBJECT */
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switch (StackDesc->Common.Type)
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{
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case ACPI_TYPE_LOCAL_REFERENCE:
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RefType = StackDesc->Reference.Class;
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switch (RefType)
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{
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case ACPI_REFCLASS_LOCAL:
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case ACPI_REFCLASS_ARG:
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/*
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* Get the local from the method's state info
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* Note: this increments the local's object reference count
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*/
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Status = AcpiDsMethodDataGetValue (RefType,
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StackDesc->Reference.Value, WalkState, &ObjDesc);
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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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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n",
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StackDesc->Reference.Value, ObjDesc));
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/*
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* Now we can delete the original Reference Object and
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* replace it with the resolved value
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*/
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AcpiUtRemoveReference (StackDesc);
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*StackPtr = ObjDesc;
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break;
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case ACPI_REFCLASS_INDEX:
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switch (StackDesc->Reference.TargetType)
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{
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case ACPI_TYPE_BUFFER_FIELD:
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/* Just return - do not dereference */
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break;
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case ACPI_TYPE_PACKAGE:
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/* If method call or CopyObject - do not dereference */
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if ((WalkState->Opcode == AML_INT_METHODCALL_OP) ||
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(WalkState->Opcode == AML_COPY_OP))
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{
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break;
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}
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/* Otherwise, dereference the PackageIndex to a package element */
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ObjDesc = *StackDesc->Reference.Where;
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if (ObjDesc)
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{
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/*
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* Valid object descriptor, copy pointer to return value
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* (i.e., dereference the package index)
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* Delete the ref object, increment the returned object
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*/
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AcpiUtRemoveReference (StackDesc);
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AcpiUtAddReference (ObjDesc);
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*StackPtr = ObjDesc;
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}
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else
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{
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/*
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* A NULL object descriptor means an uninitialized element of
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* the package, can't dereference it
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*/
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ACPI_ERROR ((AE_INFO,
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"Attempt to dereference an Index to NULL package element Idx=%p",
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StackDesc));
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Status = AE_AML_UNINITIALIZED_ELEMENT;
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}
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break;
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default:
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/* Invalid reference object */
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ACPI_ERROR ((AE_INFO,
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"Unknown TargetType 0x%X in Index/Reference object %p",
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StackDesc->Reference.TargetType, StackDesc));
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Status = AE_AML_INTERNAL;
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break;
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}
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break;
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case ACPI_REFCLASS_REFOF:
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case ACPI_REFCLASS_DEBUG:
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case ACPI_REFCLASS_TABLE:
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/* Just leave the object as-is, do not dereference */
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break;
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case ACPI_REFCLASS_NAME: /* Reference to a named object */
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/* Dereference the name */
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if ((StackDesc->Reference.Node->Type == ACPI_TYPE_DEVICE) ||
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(StackDesc->Reference.Node->Type == ACPI_TYPE_THERMAL))
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{
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/* These node types do not have 'real' subobjects */
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*StackPtr = (void *) StackDesc->Reference.Node;
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}
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else
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{
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/* Get the object pointed to by the namespace node */
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*StackPtr = (StackDesc->Reference.Node)->Object;
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AcpiUtAddReference (*StackPtr);
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}
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AcpiUtRemoveReference (StackDesc);
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break;
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default:
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ACPI_ERROR ((AE_INFO,
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"Unknown Reference type 0x%X in %p", RefType, StackDesc));
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Status = AE_AML_INTERNAL;
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break;
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}
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break;
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case ACPI_TYPE_BUFFER:
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Status = AcpiDsGetBufferArguments (StackDesc);
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break;
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case ACPI_TYPE_PACKAGE:
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Status = AcpiDsGetPackageArguments (StackDesc);
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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case ACPI_TYPE_LOCAL_REGION_FIELD:
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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case ACPI_TYPE_LOCAL_INDEX_FIELD:
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n",
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StackDesc, StackDesc->Common.Type));
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Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc);
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/* Remove a reference to the original operand, then override */
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AcpiUtRemoveReference (*StackPtr);
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*StackPtr = (void *) ObjDesc;
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break;
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default:
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break;
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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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* FUNCTION: AcpiExResolveMultiple
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*
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* PARAMETERS: WalkState - Current state (contains AML opcode)
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* Operand - Starting point for resolution
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* ReturnType - Where the object type is returned
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* ReturnDesc - Where the resolved object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return the base object and type. Traverse a reference list if
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* necessary to get to the base object.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExResolveMultiple (
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ACPI_WALK_STATE *WalkState,
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ACPI_OPERAND_OBJECT *Operand,
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ACPI_OBJECT_TYPE *ReturnType,
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ACPI_OPERAND_OBJECT **ReturnDesc)
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{
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ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_OBJECT_TYPE Type;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiExResolveMultiple);
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/* Operand can be either a namespace node or an operand descriptor */
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switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
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{
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case ACPI_DESC_TYPE_OPERAND:
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Type = ObjDesc->Common.Type;
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break;
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case ACPI_DESC_TYPE_NAMED:
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Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
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ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
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/* If we had an Alias node, use the attached object for type info */
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if (Type == ACPI_TYPE_LOCAL_ALIAS)
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{
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Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
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ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
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}
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break;
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default:
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* If type is anything other than a reference, we are done */
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if (Type != ACPI_TYPE_LOCAL_REFERENCE)
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{
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goto Exit;
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}
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/*
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* For reference objects created via the RefOf, Index, or Load/LoadTable
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* operators, we need to get to the base object (as per the ACPI
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* specification of the ObjectType and SizeOf operators). This means
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* traversing the list of possibly many nested references.
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*/
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while (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
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{
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switch (ObjDesc->Reference.Class)
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{
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case ACPI_REFCLASS_REFOF:
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case ACPI_REFCLASS_NAME:
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/* Dereference the reference pointer */
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if (ObjDesc->Reference.Class == ACPI_REFCLASS_REFOF)
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{
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Node = ObjDesc->Reference.Object;
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}
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else /* AML_INT_NAMEPATH_OP */
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{
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Node = ObjDesc->Reference.Node;
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}
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/* All "References" point to a NS node */
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if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
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{
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ACPI_ERROR ((AE_INFO,
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"Not a namespace node %p [%s]",
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Node, AcpiUtGetDescriptorName (Node)));
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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/* Get the attached object */
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ObjDesc = AcpiNsGetAttachedObject (Node);
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if (!ObjDesc)
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{
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/* No object, use the NS node type */
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Type = AcpiNsGetType (Node);
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goto Exit;
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}
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/* Check for circular references */
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if (ObjDesc == Operand)
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{
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return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
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}
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break;
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case ACPI_REFCLASS_INDEX:
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/* Get the type of this reference (index into another object) */
|
|
|
|
Type = ObjDesc->Reference.TargetType;
|
|
if (Type != ACPI_TYPE_PACKAGE)
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
/*
|
|
* The main object is a package, we want to get the type
|
|
* of the individual package element that is referenced by
|
|
* the index.
|
|
*
|
|
* This could of course in turn be another reference object.
|
|
*/
|
|
ObjDesc = *(ObjDesc->Reference.Where);
|
|
if (!ObjDesc)
|
|
{
|
|
/* NULL package elements are allowed */
|
|
|
|
Type = 0; /* Uninitialized */
|
|
goto Exit;
|
|
}
|
|
break;
|
|
|
|
|
|
case ACPI_REFCLASS_TABLE:
|
|
|
|
Type = ACPI_TYPE_DDB_HANDLE;
|
|
goto Exit;
|
|
|
|
|
|
case ACPI_REFCLASS_LOCAL:
|
|
case ACPI_REFCLASS_ARG:
|
|
|
|
if (ReturnDesc)
|
|
{
|
|
Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Class,
|
|
ObjDesc->Reference.Value, WalkState, &ObjDesc);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
AcpiUtRemoveReference (ObjDesc);
|
|
}
|
|
else
|
|
{
|
|
Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Class,
|
|
ObjDesc->Reference.Value, WalkState, &Node);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (!ObjDesc)
|
|
{
|
|
Type = ACPI_TYPE_ANY;
|
|
goto Exit;
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
case ACPI_REFCLASS_DEBUG:
|
|
|
|
/* The Debug Object is of type "DebugObject" */
|
|
|
|
Type = ACPI_TYPE_DEBUG_OBJECT;
|
|
goto Exit;
|
|
|
|
|
|
default:
|
|
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Unknown Reference Class 0x%2.2X", ObjDesc->Reference.Class));
|
|
return_ACPI_STATUS (AE_AML_INTERNAL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now we are guaranteed to have an object that has not been created
|
|
* via the RefOf or Index operators.
|
|
*/
|
|
Type = ObjDesc->Common.Type;
|
|
|
|
|
|
Exit:
|
|
/* Convert internal types to external types */
|
|
|
|
switch (Type)
|
|
{
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
|
|
|
Type = ACPI_TYPE_FIELD_UNIT;
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_SCOPE:
|
|
|
|
/* Per ACPI Specification, Scope is untyped */
|
|
|
|
Type = ACPI_TYPE_ANY;
|
|
break;
|
|
|
|
default:
|
|
/* No change to Type required */
|
|
break;
|
|
}
|
|
|
|
*ReturnType = Type;
|
|
if (ReturnDesc)
|
|
{
|
|
*ReturnDesc = ObjDesc;
|
|
}
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|