- 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
466 lines
17 KiB
C
466 lines
17 KiB
C
/******************************************************************************
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*
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* Module Name: exfield - ACPI AML (p-code) execution - field manipulation
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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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 __EXFIELD_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exfield")
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/*******************************************************************************
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*
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* FUNCTION: AcpiExReadDataFromField
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*
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* PARAMETERS: WalkState - Current execution state
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* ObjDesc - The named field
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* RetBufferDesc - Where the return data object is stored
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read from a named field. Returns either an Integer or a
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* Buffer, depending on the size of the field.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExReadDataFromField (
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ACPI_WALK_STATE *WalkState,
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_OPERAND_OBJECT **RetBufferDesc)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *BufferDesc;
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ACPI_SIZE Length;
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void *Buffer;
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UINT32 Function;
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ACPI_FUNCTION_TRACE_PTR (ExReadDataFromField, ObjDesc);
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/* Parameter validation */
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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if (!RetBufferDesc)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD)
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{
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/*
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* If the BufferField arguments have not been previously evaluated,
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* evaluate them now and save the results.
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*/
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if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID))
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{
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Status = AcpiDsGetBufferFieldArguments (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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}
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}
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else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) &&
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(ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS ||
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ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI))
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{
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/*
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* This is an SMBus or IPMI read. We must create a buffer to hold
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* the data and then directly access the region handler.
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*
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* Note: Smbus protocol value is passed in upper 16-bits of Function
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*/
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if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS)
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{
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Length = ACPI_SMBUS_BUFFER_SIZE;
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Function = ACPI_READ | (ObjDesc->Field.Attribute << 16);
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}
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else /* IPMI */
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{
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Length = ACPI_IPMI_BUFFER_SIZE;
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Function = ACPI_READ;
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}
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BufferDesc = AcpiUtCreateBufferObject (Length);
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if (!BufferDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Lock entire transaction if requested */
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AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags);
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/* Call the region handler for the read */
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Status = AcpiExAccessRegion (ObjDesc, 0,
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ACPI_CAST_PTR (UINT64, BufferDesc->Buffer.Pointer),
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Function);
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AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags);
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goto Exit;
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}
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/*
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* Allocate a buffer for the contents of the field.
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*
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* If the field is larger than the current integer width, create
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* a BUFFER to hold it. Otherwise, use an INTEGER. This allows
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* the use of arithmetic operators on the returned value if the
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* field size is equal or smaller than an Integer.
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*
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* Note: Field.length is in bits.
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*/
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Length = (ACPI_SIZE) ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->Field.BitLength);
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if (Length > AcpiGbl_IntegerByteWidth)
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{
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/* Field is too large for an Integer, create a Buffer instead */
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BufferDesc = AcpiUtCreateBufferObject (Length);
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if (!BufferDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Buffer = BufferDesc->Buffer.Pointer;
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}
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else
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{
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/* Field will fit within an Integer (normal case) */
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BufferDesc = AcpiUtCreateIntegerObject ((UINT64) 0);
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if (!BufferDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Length = AcpiGbl_IntegerByteWidth;
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Buffer = &BufferDesc->Integer.Value;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
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"FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n",
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ObjDesc, ObjDesc->Common.Type, Buffer, (UINT32) Length));
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ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
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"FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n",
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ObjDesc->CommonField.BitLength,
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ObjDesc->CommonField.StartFieldBitOffset,
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ObjDesc->CommonField.BaseByteOffset));
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/* Lock entire transaction if requested */
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AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags);
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/* Read from the field */
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Status = AcpiExExtractFromField (ObjDesc, Buffer, (UINT32) Length);
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AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags);
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Exit:
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if (ACPI_FAILURE (Status))
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{
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AcpiUtRemoveReference (BufferDesc);
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}
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else
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{
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*RetBufferDesc = BufferDesc;
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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: AcpiExWriteDataToField
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*
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* PARAMETERS: SourceDesc - Contains data to write
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* ObjDesc - The named field
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* ResultDesc - Where the return value is returned, if any
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write to a named field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExWriteDataToField (
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ACPI_OPERAND_OBJECT *SourceDesc,
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_OPERAND_OBJECT **ResultDesc)
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{
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ACPI_STATUS Status;
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UINT32 Length;
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void *Buffer;
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ACPI_OPERAND_OBJECT *BufferDesc;
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UINT32 Function;
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ACPI_FUNCTION_TRACE_PTR (ExWriteDataToField, ObjDesc);
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/* Parameter validation */
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if (!SourceDesc || !ObjDesc)
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{
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD)
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{
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/*
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* If the BufferField arguments have not been previously evaluated,
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* evaluate them now and save the results.
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*/
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if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID))
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{
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Status = AcpiDsGetBufferFieldArguments (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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}
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}
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else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) &&
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(ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS ||
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ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI))
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{
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/*
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* This is an SMBus or IPMI write. We will bypass the entire field
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* mechanism and handoff the buffer directly to the handler. For
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* these address spaces, the buffer is bi-directional; on a write,
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* return data is returned in the same buffer.
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*
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* Source must be a buffer of sufficient size:
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* ACPI_SMBUS_BUFFER_SIZE or ACPI_IPMI_BUFFER_SIZE.
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*
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* Note: SMBus protocol type is passed in upper 16-bits of Function
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*/
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if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)
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{
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ACPI_ERROR ((AE_INFO,
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"SMBus or IPMI write requires Buffer, found type %s",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS)
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{
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Length = ACPI_SMBUS_BUFFER_SIZE;
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Function = ACPI_WRITE | (ObjDesc->Field.Attribute << 16);
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}
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else /* IPMI */
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{
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Length = ACPI_IPMI_BUFFER_SIZE;
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Function = ACPI_WRITE;
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}
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if (SourceDesc->Buffer.Length < Length)
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{
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ACPI_ERROR ((AE_INFO,
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"SMBus or IPMI write requires Buffer of length %u, found length %u",
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Length, SourceDesc->Buffer.Length));
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return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
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}
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/* Create the bi-directional buffer */
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BufferDesc = AcpiUtCreateBufferObject (Length);
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if (!BufferDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Buffer = BufferDesc->Buffer.Pointer;
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ACPI_MEMCPY (Buffer, SourceDesc->Buffer.Pointer, Length);
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/* Lock entire transaction if requested */
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AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags);
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/*
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* Perform the write (returns status and perhaps data in the
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* same buffer)
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*/
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Status = AcpiExAccessRegion (ObjDesc, 0,
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(UINT64 *) Buffer, Function);
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AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags);
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*ResultDesc = BufferDesc;
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return_ACPI_STATUS (Status);
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}
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/* Get a pointer to the data to be written */
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switch (SourceDesc->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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Buffer = &SourceDesc->Integer.Value;
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Length = sizeof (SourceDesc->Integer.Value);
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break;
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case ACPI_TYPE_BUFFER:
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Buffer = SourceDesc->Buffer.Pointer;
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Length = SourceDesc->Buffer.Length;
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break;
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case ACPI_TYPE_STRING:
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Buffer = SourceDesc->String.Pointer;
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Length = SourceDesc->String.Length;
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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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ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
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"FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n",
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SourceDesc, AcpiUtGetTypeName (SourceDesc->Common.Type),
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SourceDesc->Common.Type, Buffer, Length));
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ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
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"FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n",
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ObjDesc, AcpiUtGetTypeName (ObjDesc->Common.Type),
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ObjDesc->Common.Type,
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ObjDesc->CommonField.BitLength,
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ObjDesc->CommonField.StartFieldBitOffset,
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ObjDesc->CommonField.BaseByteOffset));
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/* Lock entire transaction if requested */
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AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags);
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/* Write to the field */
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Status = AcpiExInsertIntoField (ObjDesc, Buffer, Length);
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AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags);
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return_ACPI_STATUS (Status);
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}
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