acpica/executer/exconfig.c

db2bae30SDana Myers/******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
db2bae30SDana Myers *
db2bae30SDana Myers *****************************************************************************/
db2bae30SDana Myers
26f3cdf0SGordon Ross/*
*385cc6b4SJerry Jelinek * Copyright (C) 2000 - 2016, Intel Corp.
db2bae30SDana Myers * All rights reserved.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * Redistribution and use in source and binary forms, with or without
26f3cdf0SGordon Ross * modification, are permitted provided that the following conditions
26f3cdf0SGordon Ross * are met:
26f3cdf0SGordon Ross * 1. Redistributions of source code must retain the above copyright
26f3cdf0SGordon Ross *    notice, this list of conditions, and the following disclaimer,
26f3cdf0SGordon Ross *    without modification.
26f3cdf0SGordon Ross * 2. Redistributions in binary form must reproduce at minimum a disclaimer
26f3cdf0SGordon Ross *    substantially similar to the "NO WARRANTY" disclaimer below
26f3cdf0SGordon Ross *    ("Disclaimer") and any redistribution must be conditioned upon
26f3cdf0SGordon Ross *    including a substantially similar Disclaimer requirement for further
26f3cdf0SGordon Ross *    binary redistribution.
26f3cdf0SGordon Ross * 3. Neither the names of the above-listed copyright holders nor the names
26f3cdf0SGordon Ross *    of any contributors may be used to endorse or promote products derived
26f3cdf0SGordon Ross *    from this software without specific prior written permission.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * Alternatively, this software may be distributed under the terms of the
26f3cdf0SGordon Ross * GNU General Public License ("GPL") version 2 as published by the Free
26f3cdf0SGordon Ross * Software Foundation.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * NO WARRANTY
26f3cdf0SGordon Ross * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26f3cdf0SGordon Ross * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26f3cdf0SGordon Ross * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
26f3cdf0SGordon Ross * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26f3cdf0SGordon Ross * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26f3cdf0SGordon Ross * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26f3cdf0SGordon Ross * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26f3cdf0SGordon Ross * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26f3cdf0SGordon Ross * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26f3cdf0SGordon Ross * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26f3cdf0SGordon Ross * POSSIBILITY OF SUCH DAMAGES.
26f3cdf0SGordon Ross */
db2bae30SDana Myers
db2bae30SDana Myers#include "acpi.h"
aa2aa9a6SDana Myers#include "accommon.h"
db2bae30SDana Myers#include "acinterp.h"
db2bae30SDana Myers#include "acnamesp.h"
db2bae30SDana Myers#include "actables.h"
db2bae30SDana Myers#include "acdispat.h"
aa2aa9a6SDana Myers#include "acevents.h"
*385cc6b4SJerry Jelinek#include "amlcode.h"
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers#define _COMPONENT          ACPI_EXECUTER
db2bae30SDana Myers        ACPI_MODULE_NAME    ("exconfig")
db2bae30SDana Myers
db2bae30SDana Myers/* Local prototypes */
db2bae30SDana Myers
db2bae30SDana Myersstatic ACPI_STATUS
db2bae30SDana MyersAcpiExAddTable (
db2bae30SDana Myers    UINT32                  TableIndex,
db2bae30SDana Myers    ACPI_NAMESPACE_NODE     *ParentNode,
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     **DdbHandle);
db2bae30SDana Myers
aa2aa9a6SDana Myersstatic ACPI_STATUS
aa2aa9a6SDana MyersAcpiExRegionRead (
aa2aa9a6SDana Myers    ACPI_OPERAND_OBJECT     *ObjDesc,
aa2aa9a6SDana Myers    UINT32                  Length,
aa2aa9a6SDana Myers    UINT8                   *Buffer);
aa2aa9a6SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExAddTable
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  Table               - Pointer to raw table
db2bae30SDana Myers *              ParentNode          - Where to load the table (scope)
db2bae30SDana Myers *              DdbHandle           - Where to return the table handle.
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Common function to Install and Load an ACPI table with a
db2bae30SDana Myers *              returned table handle.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersstatic ACPI_STATUS
db2bae30SDana MyersAcpiExAddTable (
db2bae30SDana Myers    UINT32                  TableIndex,
db2bae30SDana Myers    ACPI_NAMESPACE_NODE     *ParentNode,
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     **DdbHandle)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *ObjDesc;
26f3cdf0SGordon Ross    ACPI_STATUS             Status;
26f3cdf0SGordon Ross    ACPI_OWNER_ID           OwnerId;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExAddTable);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Create an object to be the table handle */
db2bae30SDana Myers
db2bae30SDana Myers    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
db2bae30SDana Myers    if (!ObjDesc)
db2bae30SDana Myers    {
db2bae30SDana Myers        return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Init the table handle */
db2bae30SDana Myers
aa2aa9a6SDana Myers    ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;
db2bae30SDana Myers    ObjDesc->Reference.Class = ACPI_REFCLASS_TABLE;
db2bae30SDana Myers    *DdbHandle = ObjDesc;
db2bae30SDana Myers
db2bae30SDana Myers    /* Install the new table into the local data structures */
db2bae30SDana Myers
db2bae30SDana Myers    ObjDesc->Reference.Value = TableIndex;
db2bae30SDana Myers
db2bae30SDana Myers    /* Add the table to the namespace */
db2bae30SDana Myers
db2bae30SDana Myers    Status = AcpiNsLoadTable (TableIndex, ParentNode);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        AcpiUtRemoveReference (ObjDesc);
db2bae30SDana Myers        *DdbHandle = NULL;
57190917SDana Myers        return_ACPI_STATUS (Status);
db2bae30SDana Myers    }
db2bae30SDana Myers
57190917SDana Myers    /* Execute any module-level code that was found in the table */
57190917SDana Myers
57190917SDana Myers    AcpiExExitInterpreter ();
*385cc6b4SJerry Jelinek    if (AcpiGbl_GroupModuleLevelCode)
*385cc6b4SJerry Jelinek    {
57190917SDana Myers        AcpiNsExecModuleCodeList ();
*385cc6b4SJerry Jelinek    }
57190917SDana Myers    AcpiExEnterInterpreter ();
57190917SDana Myers
26f3cdf0SGordon Ross    /*
26f3cdf0SGordon Ross     * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is
26f3cdf0SGordon Ross     * responsible for discovering any new wake GPEs by running _PRW methods
26f3cdf0SGordon Ross     * that may have been loaded by this table.
26f3cdf0SGordon Ross     */
26f3cdf0SGordon Ross    Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
26f3cdf0SGordon Ross    if (ACPI_SUCCESS (Status))
26f3cdf0SGordon Ross    {
26f3cdf0SGordon Ross        AcpiEvUpdateGpes (OwnerId);
26f3cdf0SGordon Ross    }
26f3cdf0SGordon Ross
26f3cdf0SGordon Ross    return_ACPI_STATUS (AE_OK);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExLoadTableOp
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  WalkState           - Current state with operands
db2bae30SDana Myers *              ReturnDesc          - Where to store the return object
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Load an ACPI table from the RSDT/XSDT
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiExLoadTableOp (
db2bae30SDana Myers    ACPI_WALK_STATE         *WalkState,
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     **ReturnDesc)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
db2bae30SDana Myers    ACPI_NAMESPACE_NODE     *ParentNode;
db2bae30SDana Myers    ACPI_NAMESPACE_NODE     *StartNode;
db2bae30SDana Myers    ACPI_NAMESPACE_NODE     *ParameterNode = NULL;
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *DdbHandle;
db2bae30SDana Myers    ACPI_TABLE_HEADER       *Table;
db2bae30SDana Myers    UINT32                  TableIndex;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExLoadTableOp);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Find the ACPI table in the RSDT/XSDT */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek    Status = AcpiTbFindTable (
*385cc6b4SJerry Jelinek        Operand[0]->String.Pointer,
db2bae30SDana Myers        Operand[1]->String.Pointer,
db2bae30SDana Myers        Operand[2]->String.Pointer, &TableIndex);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        if (Status != AE_NOT_FOUND)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (Status);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /* Table not found, return an Integer=0 and AE_OK */
db2bae30SDana Myers
57190917SDana Myers        DdbHandle = AcpiUtCreateIntegerObject ((UINT64) 0);
db2bae30SDana Myers        if (!DdbHandle)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        *ReturnDesc = DdbHandle;
db2bae30SDana Myers        return_ACPI_STATUS (AE_OK);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Default nodes */
db2bae30SDana Myers
db2bae30SDana Myers    StartNode = WalkState->ScopeInfo->Scope.Node;
db2bae30SDana Myers    ParentNode = AcpiGbl_RootNode;
db2bae30SDana Myers
db2bae30SDana Myers    /* RootPath (optional parameter) */
db2bae30SDana Myers
db2bae30SDana Myers    if (Operand[3]->String.Length > 0)
db2bae30SDana Myers    {
db2bae30SDana Myers        /*
db2bae30SDana Myers         * Find the node referenced by the RootPathString. This is the
db2bae30SDana Myers         * location within the namespace where the table will be loaded.
db2bae30SDana Myers         */
db2bae30SDana Myers        Status = AcpiNsGetNode (StartNode, Operand[3]->String.Pointer,
db2bae30SDana Myers            ACPI_NS_SEARCH_PARENT, &ParentNode);
db2bae30SDana Myers        if (ACPI_FAILURE (Status))
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (Status);
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* ParameterPath (optional parameter) */
db2bae30SDana Myers
db2bae30SDana Myers    if (Operand[4]->String.Length > 0)
db2bae30SDana Myers    {
*385cc6b4SJerry Jelinek        if ((Operand[4]->String.Pointer[0] != AML_ROOT_PREFIX) &&
*385cc6b4SJerry Jelinek            (Operand[4]->String.Pointer[0] != AML_PARENT_PREFIX))
db2bae30SDana Myers        {
db2bae30SDana Myers            /*
db2bae30SDana Myers             * Path is not absolute, so it will be relative to the node
db2bae30SDana Myers             * referenced by the RootPathString (or the NS root if omitted)
db2bae30SDana Myers             */
db2bae30SDana Myers            StartNode = ParentNode;
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /* Find the node referenced by the ParameterPathString */
db2bae30SDana Myers
db2bae30SDana Myers        Status = AcpiNsGetNode (StartNode, Operand[4]->String.Pointer,
db2bae30SDana Myers            ACPI_NS_SEARCH_PARENT, &ParameterNode);
db2bae30SDana Myers        if (ACPI_FAILURE (Status))
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (Status);
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Load the table into the namespace */
db2bae30SDana Myers
db2bae30SDana Myers    Status = AcpiExAddTable (TableIndex, ParentNode, &DdbHandle);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        return_ACPI_STATUS (Status);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Parameter Data (optional) */
db2bae30SDana Myers
db2bae30SDana Myers    if (ParameterNode)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Store the parameter data into the optional parameter object */
db2bae30SDana Myers
db2bae30SDana Myers        Status = AcpiExStore (Operand[5],
*385cc6b4SJerry Jelinek            ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParameterNode), WalkState);
db2bae30SDana Myers        if (ACPI_FAILURE (Status))
db2bae30SDana Myers        {
db2bae30SDana Myers            (void) AcpiExUnloadTable (DdbHandle);
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers            AcpiUtRemoveReference (DdbHandle);
db2bae30SDana Myers            return_ACPI_STATUS (Status);
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    Status = AcpiGetTableByIndex (TableIndex, &Table);
db2bae30SDana Myers    if (ACPI_SUCCESS (Status))
db2bae30SDana Myers    {
*385cc6b4SJerry Jelinek        ACPI_INFO (("Dynamic OEM Table Load:"));
26f3cdf0SGordon Ross        AcpiTbPrintTableHeader (0, Table);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Invoke table handler if present */
db2bae30SDana Myers
db2bae30SDana Myers    if (AcpiGbl_TableHandler)
db2bae30SDana Myers    {
db2bae30SDana Myers        (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table,
db2bae30SDana Myers            AcpiGbl_TableHandlerContext);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    *ReturnDesc = DdbHandle;
db2bae30SDana Myers    return_ACPI_STATUS (Status);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
aa2aa9a6SDana Myers * FUNCTION:    AcpiExRegionRead
aa2aa9a6SDana Myers *
aa2aa9a6SDana Myers * PARAMETERS:  ObjDesc         - Region descriptor
aa2aa9a6SDana Myers *              Length          - Number of bytes to read
aa2aa9a6SDana Myers *              Buffer          - Pointer to where to put the data
aa2aa9a6SDana Myers *
aa2aa9a6SDana Myers * RETURN:      Status
aa2aa9a6SDana Myers *
aa2aa9a6SDana Myers * DESCRIPTION: Read data from an operation region. The read starts from the
aa2aa9a6SDana Myers *              beginning of the region.
aa2aa9a6SDana Myers *
aa2aa9a6SDana Myers ******************************************************************************/
aa2aa9a6SDana Myers
aa2aa9a6SDana Myersstatic ACPI_STATUS
aa2aa9a6SDana MyersAcpiExRegionRead (
aa2aa9a6SDana Myers    ACPI_OPERAND_OBJECT     *ObjDesc,
aa2aa9a6SDana Myers    UINT32                  Length,
aa2aa9a6SDana Myers    UINT8                   *Buffer)
aa2aa9a6SDana Myers{
aa2aa9a6SDana Myers    ACPI_STATUS             Status;
26f3cdf0SGordon Ross    UINT64                  Value;
aa2aa9a6SDana Myers    UINT32                  RegionOffset = 0;
aa2aa9a6SDana Myers    UINT32                  i;
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers    /* Bytewise reads */
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers    for (i = 0; i < Length; i++)
aa2aa9a6SDana Myers    {
*385cc6b4SJerry Jelinek        Status = AcpiEvAddressSpaceDispatch (ObjDesc, NULL, ACPI_READ,
aa2aa9a6SDana Myers            RegionOffset, 8, &Value);
aa2aa9a6SDana Myers        if (ACPI_FAILURE (Status))
aa2aa9a6SDana Myers        {
aa2aa9a6SDana Myers            return (Status);
aa2aa9a6SDana Myers        }
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers        *Buffer = (UINT8) Value;
aa2aa9a6SDana Myers        Buffer++;
aa2aa9a6SDana Myers        RegionOffset++;
aa2aa9a6SDana Myers    }
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers    return (AE_OK);
aa2aa9a6SDana Myers}
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers/*******************************************************************************
aa2aa9a6SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExLoadOp
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  ObjDesc         - Region or Buffer/Field where the table will be
db2bae30SDana Myers *                                obtained
db2bae30SDana Myers *              Target          - Where a handle to the table will be stored
db2bae30SDana Myers *              WalkState       - Current state
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Load an ACPI table from a field or operation region
db2bae30SDana Myers *
db2bae30SDana Myers * NOTE: Region Fields (Field, BankField, IndexFields) are resolved to buffer
db2bae30SDana Myers *       objects before this code is reached.
db2bae30SDana Myers *
db2bae30SDana Myers *       If source is an operation region, it must refer to SystemMemory, as
db2bae30SDana Myers *       per the ACPI specification.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiExLoadOp (
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *ObjDesc,
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *Target,
db2bae30SDana Myers    ACPI_WALK_STATE         *WalkState)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *DdbHandle;
*385cc6b4SJerry Jelinek    ACPI_TABLE_HEADER       *TableHeader;
db2bae30SDana Myers    ACPI_TABLE_HEADER       *Table;
db2bae30SDana Myers    UINT32                  TableIndex;
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers    UINT32                  Length;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExLoadOp);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Source Object can be either an OpRegion or a Buffer/Field */
db2bae30SDana Myers
aa2aa9a6SDana Myers    switch (ObjDesc->Common.Type)
db2bae30SDana Myers    {
db2bae30SDana Myers    case ACPI_TYPE_REGION:
db2bae30SDana Myers
db2bae30SDana Myers        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
db2bae30SDana Myers            "Load table from Region %p\n", ObjDesc));
db2bae30SDana Myers
db2bae30SDana Myers        /* Region must be SystemMemory (from ACPI spec) */
db2bae30SDana Myers
db2bae30SDana Myers        if (ObjDesc->Region.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /*
*385cc6b4SJerry Jelinek         * If the Region Address and Length have not been previously
*385cc6b4SJerry Jelinek         * evaluated, evaluate them now and save the results.
db2bae30SDana Myers         */
db2bae30SDana Myers        if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID))
db2bae30SDana Myers        {
db2bae30SDana Myers            Status = AcpiDsGetRegionArguments (ObjDesc);
db2bae30SDana Myers            if (ACPI_FAILURE (Status))
db2bae30SDana Myers            {
db2bae30SDana Myers                return_ACPI_STATUS (Status);
db2bae30SDana Myers            }
db2bae30SDana Myers        }
db2bae30SDana Myers
aa2aa9a6SDana Myers        /* Get the table header first so we can get the table length */
aa2aa9a6SDana Myers
*385cc6b4SJerry Jelinek        TableHeader = ACPI_ALLOCATE (sizeof (ACPI_TABLE_HEADER));
*385cc6b4SJerry Jelinek        if (!TableHeader)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers        }
db2bae30SDana Myers
aa2aa9a6SDana Myers        Status = AcpiExRegionRead (ObjDesc, sizeof (ACPI_TABLE_HEADER),
*385cc6b4SJerry Jelinek            ACPI_CAST_PTR (UINT8, TableHeader));
*385cc6b4SJerry Jelinek        Length = TableHeader->Length;
*385cc6b4SJerry Jelinek        ACPI_FREE (TableHeader);
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers        if (ACPI_FAILURE (Status))
aa2aa9a6SDana Myers        {
aa2aa9a6SDana Myers            return_ACPI_STATUS (Status);
aa2aa9a6SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /* Must have at least an ACPI table header */
db2bae30SDana Myers
db2bae30SDana Myers        if (Length < sizeof (ACPI_TABLE_HEADER))
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /*
aa2aa9a6SDana Myers         * The original implementation simply mapped the table, with no copy.
aa2aa9a6SDana Myers         * However, the memory region is not guaranteed to remain stable and
aa2aa9a6SDana Myers         * we must copy the table to a local buffer. For example, the memory
aa2aa9a6SDana Myers         * region is corrupted after suspend on some machines. Dynamically
aa2aa9a6SDana Myers         * loaded tables are usually small, so this overhead is minimal.
aa2aa9a6SDana Myers         *
aa2aa9a6SDana Myers         * The latest implementation (5/2009) does not use a mapping at all.
aa2aa9a6SDana Myers         * We use the low-level operation region interface to read the table
aa2aa9a6SDana Myers         * instead of the obvious optimization of using a direct mapping.
aa2aa9a6SDana Myers         * This maintains a consistent use of operation regions across the
aa2aa9a6SDana Myers         * entire subsystem. This is important if additional processing must
aa2aa9a6SDana Myers         * be performed in the (possibly user-installed) operation region
aa2aa9a6SDana Myers         * handler. For example, AcpiExec and ASLTS depend on this.
db2bae30SDana Myers         */
db2bae30SDana Myers
db2bae30SDana Myers        /* Allocate a buffer for the table */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek        Table = ACPI_ALLOCATE (Length);
*385cc6b4SJerry Jelinek        if (!Table)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers        }
db2bae30SDana Myers
aa2aa9a6SDana Myers        /* Read the entire table */
db2bae30SDana Myers
aa2aa9a6SDana Myers        Status = AcpiExRegionRead (ObjDesc, Length,
*385cc6b4SJerry Jelinek            ACPI_CAST_PTR (UINT8, Table));
aa2aa9a6SDana Myers        if (ACPI_FAILURE (Status))
db2bae30SDana Myers        {
*385cc6b4SJerry Jelinek            ACPI_FREE (Table);
aa2aa9a6SDana Myers            return_ACPI_STATUS (Status);
db2bae30SDana Myers        }
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ACPI_TYPE_BUFFER: /* Buffer or resolved RegionField */
db2bae30SDana Myers
db2bae30SDana Myers        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
db2bae30SDana Myers            "Load table from Buffer or Field %p\n", ObjDesc));
db2bae30SDana Myers
db2bae30SDana Myers        /* Must have at least an ACPI table header */
db2bae30SDana Myers
db2bae30SDana Myers        if (ObjDesc->Buffer.Length < sizeof (ACPI_TABLE_HEADER))
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /* Get the actual table length from the table header */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek        TableHeader = ACPI_CAST_PTR (
*385cc6b4SJerry Jelinek            ACPI_TABLE_HEADER, ObjDesc->Buffer.Pointer);
*385cc6b4SJerry Jelinek        Length = TableHeader->Length;
db2bae30SDana Myers
db2bae30SDana Myers        /* Table cannot extend beyond the buffer */
db2bae30SDana Myers
db2bae30SDana Myers        if (Length > ObjDesc->Buffer.Length)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
db2bae30SDana Myers        }
db2bae30SDana Myers        if (Length < sizeof (ACPI_TABLE_HEADER))
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /*
*385cc6b4SJerry Jelinek         * Copy the table from the buffer because the buffer could be
*385cc6b4SJerry Jelinek         * modified or even deleted in the future
db2bae30SDana Myers         */
*385cc6b4SJerry Jelinek        Table = ACPI_ALLOCATE (Length);
*385cc6b4SJerry Jelinek        if (!Table)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers        }
db2bae30SDana Myers
*385cc6b4SJerry Jelinek        memcpy (Table, TableHeader, Length);
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    default:
*385cc6b4SJerry Jelinek
db2bae30SDana Myers        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Install the new table into the local data structures */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek    ACPI_INFO (("Dynamic OEM Table Load:"));
*385cc6b4SJerry Jelinek    (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    Status = AcpiTbInstallStandardTable (ACPI_PTR_TO_PHYSADDR (Table),
*385cc6b4SJerry Jelinek        ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL, TRUE, TRUE,
*385cc6b4SJerry Jelinek        &TableIndex);
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
26f3cdf0SGordon Ross        /* Delete allocated table buffer */
26f3cdf0SGordon Ross
*385cc6b4SJerry Jelinek        ACPI_FREE (Table);
*385cc6b4SJerry Jelinek        return_ACPI_STATUS (Status);
*385cc6b4SJerry Jelinek    }
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    /*
*385cc6b4SJerry Jelinek     * Note: Now table is "INSTALLED", it must be validated before
*385cc6b4SJerry Jelinek     * loading.
*385cc6b4SJerry Jelinek     */
*385cc6b4SJerry Jelinek    Status = AcpiTbValidateTable (
*385cc6b4SJerry Jelinek        &AcpiGbl_RootTableList.Tables[TableIndex]);
*385cc6b4SJerry Jelinek    if (ACPI_FAILURE (Status))
*385cc6b4SJerry Jelinek    {
26f3cdf0SGordon Ross        return_ACPI_STATUS (Status);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Add the table to the namespace.
db2bae30SDana Myers     *
db2bae30SDana Myers     * Note: Load the table objects relative to the root of the namespace.
db2bae30SDana Myers     * This appears to go against the ACPI specification, but we do it for
db2bae30SDana Myers     * compatibility with other ACPI implementations.
db2bae30SDana Myers     */
db2bae30SDana Myers    Status = AcpiExAddTable (TableIndex, AcpiGbl_RootNode, &DdbHandle);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        /* On error, TablePtr was deallocated above */
db2bae30SDana Myers
db2bae30SDana Myers        return_ACPI_STATUS (Status);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Store the DdbHandle into the Target operand */
db2bae30SDana Myers
db2bae30SDana Myers    Status = AcpiExStore (DdbHandle, Target, WalkState);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        (void) AcpiExUnloadTable (DdbHandle);
db2bae30SDana Myers
db2bae30SDana Myers        /* TablePtr was deallocated above */
db2bae30SDana Myers
db2bae30SDana Myers        AcpiUtRemoveReference (DdbHandle);
db2bae30SDana Myers        return_ACPI_STATUS (Status);
db2bae30SDana Myers    }
db2bae30SDana Myers
aa2aa9a6SDana Myers    /* Remove the reference by added by AcpiExStore above */
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers    AcpiUtRemoveReference (DdbHandle);
aa2aa9a6SDana Myers
db2bae30SDana Myers    /* Invoke table handler if present */
db2bae30SDana Myers
db2bae30SDana Myers    if (AcpiGbl_TableHandler)
db2bae30SDana Myers    {
*385cc6b4SJerry Jelinek        (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table,
db2bae30SDana Myers            AcpiGbl_TableHandlerContext);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return_ACPI_STATUS (Status);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExUnloadTable
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  DdbHandle           - Handle to a previously loaded table
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Unload an ACPI table
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiExUnloadTable (
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *DdbHandle)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status = AE_OK;
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *TableDesc = DdbHandle;
db2bae30SDana Myers    UINT32                  TableIndex;
db2bae30SDana Myers    ACPI_TABLE_HEADER       *Table;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExUnloadTable);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /*
*385cc6b4SJerry Jelinek     * Temporarily emit a warning so that the ASL for the machine can be
*385cc6b4SJerry Jelinek     * hopefully obtained. This is to say that the Unload() operator is
*385cc6b4SJerry Jelinek     * extremely rare if not completely unused.
*385cc6b4SJerry Jelinek     */
*385cc6b4SJerry Jelinek    ACPI_WARNING ((AE_INFO,
*385cc6b4SJerry Jelinek        "Received request to unload an ACPI table"));
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    /*
db2bae30SDana Myers     * Validate the handle
aa2aa9a6SDana Myers     * Although the handle is partially validated in AcpiExReconfiguration()
db2bae30SDana Myers     * when it calls AcpiExResolveOperands(), the handle is more completely
db2bae30SDana Myers     * validated here.
aa2aa9a6SDana Myers     *
aa2aa9a6SDana Myers     * Handle must be a valid operand object of type reference. Also, the
aa2aa9a6SDana Myers     * DdbHandle must still be marked valid (table has not been previously
aa2aa9a6SDana Myers     * unloaded)
db2bae30SDana Myers     */
db2bae30SDana Myers    if ((!DdbHandle) ||
db2bae30SDana Myers        (ACPI_GET_DESCRIPTOR_TYPE (DdbHandle) != ACPI_DESC_TYPE_OPERAND) ||
aa2aa9a6SDana Myers        (DdbHandle->Common.Type != ACPI_TYPE_LOCAL_REFERENCE) ||
aa2aa9a6SDana Myers        (!(DdbHandle->Common.Flags & AOPOBJ_DATA_VALID)))
db2bae30SDana Myers    {
*385cc6b4SJerry Jelinek        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Get the table index from the DdbHandle */
db2bae30SDana Myers
db2bae30SDana Myers    TableIndex = TableDesc->Reference.Value;
db2bae30SDana Myers
aa2aa9a6SDana Myers    /* Ensure the table is still loaded */
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers    if (!AcpiTbIsTableLoaded (TableIndex))
aa2aa9a6SDana Myers    {
aa2aa9a6SDana Myers        return_ACPI_STATUS (AE_NOT_EXIST);
aa2aa9a6SDana Myers    }
aa2aa9a6SDana Myers
db2bae30SDana Myers    /* Invoke table handler if present */
db2bae30SDana Myers
db2bae30SDana Myers    if (AcpiGbl_TableHandler)
db2bae30SDana Myers    {
db2bae30SDana Myers        Status = AcpiGetTableByIndex (TableIndex, &Table);
db2bae30SDana Myers        if (ACPI_SUCCESS (Status))
db2bae30SDana Myers        {
db2bae30SDana Myers            (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD, Table,
db2bae30SDana Myers                AcpiGbl_TableHandlerContext);
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
aa2aa9a6SDana Myers    /* Delete the portion of the namespace owned by this table */
db2bae30SDana Myers
aa2aa9a6SDana Myers    Status = AcpiTbDeleteNamespaceByOwner (TableIndex);
aa2aa9a6SDana Myers    if (ACPI_FAILURE (Status))
aa2aa9a6SDana Myers    {
aa2aa9a6SDana Myers        return_ACPI_STATUS (Status);
aa2aa9a6SDana Myers    }
aa2aa9a6SDana Myers
aa2aa9a6SDana Myers    (void) AcpiTbReleaseOwnerId (TableIndex);
db2bae30SDana Myers    AcpiTbSetTableLoadedFlag (TableIndex, FALSE);
db2bae30SDana Myers
aa2aa9a6SDana Myers    /*
aa2aa9a6SDana Myers     * Invalidate the handle. We do this because the handle may be stored
aa2aa9a6SDana Myers     * in a named object and may not be actually deleted until much later.
aa2aa9a6SDana Myers     */
aa2aa9a6SDana Myers    DdbHandle->Common.Flags &= ~AOPOBJ_DATA_VALID;
db2bae30SDana Myers    return_ACPI_STATUS (AE_OK);
db2bae30SDana Myers}