acpica/tables/tbxface.c

ae115bc7Smrj/******************************************************************************
ae115bc7Smrj *
*de5d74c2SJerry Jelinek * Module Name: tbxface - ACPI table-oriented external interfaces
ae115bc7Smrj *
ae115bc7Smrj *****************************************************************************/
ae115bc7Smrj
26f3cdf0SGordon Ross/*
*de5d74c2SJerry Jelinek * Copyright (C) 2000 - 2016, Intel Corp.
ae115bc7Smrj * All rights reserved.
ae115bc7Smrj *
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.
ae115bc7Smrj *
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.
ae115bc7Smrj *
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 */
ae115bc7Smrj
*de5d74c2SJerry Jelinek#define EXPORT_ACPI_INTERFACES
ae115bc7Smrj
ae115bc7Smrj#include "acpi.h"
aa2aa9a6SDana Myers#include "accommon.h"
ae115bc7Smrj#include "actables.h"
ae115bc7Smrj
ae115bc7Smrj#define _COMPONENT          ACPI_TABLES
ae115bc7Smrj        ACPI_MODULE_NAME    ("tbxface")
ae115bc7Smrj
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiAllocateRootTable
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  InitialTableCount   - Size of InitialTableArray, in number of
db2bae30SDana Myers *                                    ACPI_TABLE_DESC structures
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Allocate a root table array. Used by iASL compiler and
db2bae30SDana Myers *              AcpiInitializeTables.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiAllocateRootTable (
db2bae30SDana Myers    UINT32                  InitialTableCount)
db2bae30SDana Myers{
db2bae30SDana Myers
26f3cdf0SGordon Ross    AcpiGbl_RootTableList.MaxTableCount = InitialTableCount;
db2bae30SDana Myers    AcpiGbl_RootTableList.Flags = ACPI_ROOT_ALLOW_RESIZE;
db2bae30SDana Myers
db2bae30SDana Myers    return (AcpiTbResizeRootTableList ());
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiInitializeTables
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  InitialTableArray   - Pointer to an array of pre-allocated
db2bae30SDana Myers *                                    ACPI_TABLE_DESC structures. If NULL, the
db2bae30SDana Myers *                                    array is dynamically allocated.
db2bae30SDana Myers *              InitialTableCount   - Size of InitialTableArray, in number of
db2bae30SDana Myers *                                    ACPI_TABLE_DESC structures
*de5d74c2SJerry Jelinek *              AllowResize         - Flag to tell Table Manager if resize of
db2bae30SDana Myers *                                    pre-allocated array is allowed. Ignored
db2bae30SDana Myers *                                    if InitialTableArray is NULL.
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
db2bae30SDana Myers *
db2bae30SDana Myers * NOTE:        Allows static allocation of the initial table array in order
db2bae30SDana Myers *              to avoid the use of dynamic memory in confined environments
db2bae30SDana Myers *              such as the kernel boot sequence where it may not be available.
db2bae30SDana Myers *
db2bae30SDana Myers *              If the host OS memory managers are initialized, use NULL for
db2bae30SDana Myers *              InitialTableArray, and the table will be dynamically allocated.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiInitializeTables (
db2bae30SDana Myers    ACPI_TABLE_DESC         *InitialTableArray,
db2bae30SDana Myers    UINT32                  InitialTableCount,
db2bae30SDana Myers    BOOLEAN                 AllowResize)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_PHYSICAL_ADDRESS   RsdpAddress;
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (AcpiInitializeTables);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /*
*de5d74c2SJerry Jelinek     * Setup the Root Table Array and allocate the table array
*de5d74c2SJerry Jelinek     * if requested
db2bae30SDana Myers     */
db2bae30SDana Myers    if (!InitialTableArray)
db2bae30SDana Myers    {
db2bae30SDana Myers        Status = AcpiAllocateRootTable (InitialTableCount);
db2bae30SDana Myers        if (ACPI_FAILURE (Status))
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (Status);
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers    else
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Root Table Array has been statically allocated by the host */
db2bae30SDana Myers
*de5d74c2SJerry Jelinek        memset (InitialTableArray, 0,
db2bae30SDana Myers            (ACPI_SIZE) InitialTableCount * sizeof (ACPI_TABLE_DESC));
db2bae30SDana Myers
db2bae30SDana Myers        AcpiGbl_RootTableList.Tables = InitialTableArray;
26f3cdf0SGordon Ross        AcpiGbl_RootTableList.MaxTableCount = InitialTableCount;
db2bae30SDana Myers        AcpiGbl_RootTableList.Flags = ACPI_ROOT_ORIGIN_UNKNOWN;
db2bae30SDana Myers        if (AllowResize)
db2bae30SDana Myers        {
db2bae30SDana Myers            AcpiGbl_RootTableList.Flags |= ACPI_ROOT_ALLOW_RESIZE;
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Get the address of the RSDP */
db2bae30SDana Myers
db2bae30SDana Myers    RsdpAddress = AcpiOsGetRootPointer ();
db2bae30SDana Myers    if (!RsdpAddress)
db2bae30SDana Myers    {
db2bae30SDana Myers        return_ACPI_STATUS (AE_NOT_FOUND);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Get the root table (RSDT or XSDT) and extract all entries to the local
db2bae30SDana Myers     * Root Table Array. This array contains the information of the RSDT/XSDT
db2bae30SDana Myers     * in a common, more useable format.
db2bae30SDana Myers     */
aa2aa9a6SDana Myers    Status = AcpiTbParseRootTable (RsdpAddress);
db2bae30SDana Myers    return_ACPI_STATUS (Status);
db2bae30SDana Myers}
db2bae30SDana Myers
*de5d74c2SJerry JelinekACPI_EXPORT_SYMBOL_INIT (AcpiInitializeTables)
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiReallocateRootTable
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  None
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the
db2bae30SDana Myers *              root list from the previously provided scratch area. Should
db2bae30SDana Myers *              be called once dynamic memory allocation is available in the
*de5d74c2SJerry Jelinek *              kernel.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiReallocateRootTable (
db2bae30SDana Myers    void)
db2bae30SDana Myers{
*de5d74c2SJerry Jelinek    ACPI_STATUS             Status;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (AcpiReallocateRootTable);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Only reallocate the root table if the host provided a static buffer
db2bae30SDana Myers     * for the table array in the call to AcpiInitializeTables.
db2bae30SDana Myers     */
db2bae30SDana Myers    if (AcpiGbl_RootTableList.Flags & ACPI_ROOT_ORIGIN_ALLOCATED)
db2bae30SDana Myers    {
db2bae30SDana Myers        return_ACPI_STATUS (AE_SUPPORT);
db2bae30SDana Myers    }
db2bae30SDana Myers
*de5d74c2SJerry Jelinek    AcpiGbl_RootTableList.Flags |= ACPI_ROOT_ALLOW_RESIZE;
26f3cdf0SGordon Ross
*de5d74c2SJerry Jelinek    Status = AcpiTbResizeRootTableList ();
*de5d74c2SJerry Jelinek    return_ACPI_STATUS (Status);
db2bae30SDana Myers}
db2bae30SDana Myers
*de5d74c2SJerry JelinekACPI_EXPORT_SYMBOL_INIT (AcpiReallocateRootTable)
db2bae30SDana Myers
db2bae30SDana Myers
aa2aa9a6SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiGetTableHeader
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  Signature           - ACPI signature of needed table
db2bae30SDana Myers *              Instance            - Which instance (for SSDTs)
db2bae30SDana Myers *              OutTableHeader      - The pointer to the table header to fill
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status and pointer to mapped table header
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Finds an ACPI table header.
db2bae30SDana Myers *
db2bae30SDana Myers * NOTE:        Caller is responsible in unmapping the header with
db2bae30SDana Myers *              AcpiOsUnmapMemory
db2bae30SDana Myers *
aa2aa9a6SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiGetTableHeader (
db2bae30SDana Myers    char                    *Signature,
db2bae30SDana Myers    UINT32                  Instance,
db2bae30SDana Myers    ACPI_TABLE_HEADER       *OutTableHeader)
db2bae30SDana Myers{
db2bae30SDana Myers    UINT32                  i;
db2bae30SDana Myers    UINT32                  j;
db2bae30SDana Myers    ACPI_TABLE_HEADER       *Header;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Parameter validation */
db2bae30SDana Myers
db2bae30SDana Myers    if (!Signature || !OutTableHeader)
db2bae30SDana Myers    {
db2bae30SDana Myers        return (AE_BAD_PARAMETER);
db2bae30SDana Myers    }
db2bae30SDana Myers
aa2aa9a6SDana Myers    /* Walk the root table list */
aa2aa9a6SDana Myers
26f3cdf0SGordon Ross    for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
db2bae30SDana Myers    {
*de5d74c2SJerry Jelinek        if (!ACPI_COMPARE_NAME (
*de5d74c2SJerry Jelinek                &(AcpiGbl_RootTableList.Tables[i].Signature), Signature))
db2bae30SDana Myers        {
db2bae30SDana Myers            continue;
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        if (++j < Instance)
db2bae30SDana Myers        {
db2bae30SDana Myers            continue;
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        if (!AcpiGbl_RootTableList.Tables[i].Pointer)
db2bae30SDana Myers        {
aa2aa9a6SDana Myers            if ((AcpiGbl_RootTableList.Tables[i].Flags &
aa2aa9a6SDana Myers                    ACPI_TABLE_ORIGIN_MASK) ==
*de5d74c2SJerry Jelinek                ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL)
db2bae30SDana Myers            {
aa2aa9a6SDana Myers                Header = AcpiOsMapMemory (
aa2aa9a6SDana Myers                    AcpiGbl_RootTableList.Tables[i].Address,
db2bae30SDana Myers                    sizeof (ACPI_TABLE_HEADER));
db2bae30SDana Myers                if (!Header)
db2bae30SDana Myers                {
*de5d74c2SJerry Jelinek                    return (AE_NO_MEMORY);
db2bae30SDana Myers                }
db2bae30SDana Myers
*de5d74c2SJerry Jelinek                memcpy (OutTableHeader, Header, sizeof (ACPI_TABLE_HEADER));
db2bae30SDana Myers                AcpiOsUnmapMemory (Header, sizeof (ACPI_TABLE_HEADER));
db2bae30SDana Myers            }
db2bae30SDana Myers            else
db2bae30SDana Myers            {
*de5d74c2SJerry Jelinek                return (AE_NOT_FOUND);
db2bae30SDana Myers            }
db2bae30SDana Myers        }
db2bae30SDana Myers        else
db2bae30SDana Myers        {
*de5d74c2SJerry Jelinek            memcpy (OutTableHeader,
aa2aa9a6SDana Myers                AcpiGbl_RootTableList.Tables[i].Pointer,
db2bae30SDana Myers                sizeof (ACPI_TABLE_HEADER));
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        return (AE_OK);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return (AE_NOT_FOUND);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana MyersACPI_EXPORT_SYMBOL (AcpiGetTableHeader)
db2bae30SDana Myers
db2bae30SDana Myers
aa2aa9a6SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiGetTable
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  Signature           - ACPI signature of needed table
db2bae30SDana Myers *              Instance            - Which instance (for SSDTs)
db2bae30SDana Myers *              OutTable            - Where the pointer to the table is returned
db2bae30SDana Myers *
*de5d74c2SJerry Jelinek * RETURN:      Status and pointer to the requested table
db2bae30SDana Myers *
*de5d74c2SJerry Jelinek * DESCRIPTION: Finds and verifies an ACPI table. Table must be in the
*de5d74c2SJerry Jelinek *              RSDT/XSDT.
db2bae30SDana Myers *
aa2aa9a6SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiGetTable (
db2bae30SDana Myers    char                    *Signature,
db2bae30SDana Myers    UINT32                  Instance,
db2bae30SDana Myers    ACPI_TABLE_HEADER       **OutTable)
db2bae30SDana Myers{
db2bae30SDana Myers    UINT32                  i;
db2bae30SDana Myers    UINT32                  j;
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Parameter validation */
db2bae30SDana Myers
db2bae30SDana Myers    if (!Signature || !OutTable)
db2bae30SDana Myers    {
db2bae30SDana Myers        return (AE_BAD_PARAMETER);
db2bae30SDana Myers    }
db2bae30SDana Myers
aa2aa9a6SDana Myers    /* Walk the root table list */
aa2aa9a6SDana Myers
26f3cdf0SGordon Ross    for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
db2bae30SDana Myers    {
*de5d74c2SJerry Jelinek        if (!ACPI_COMPARE_NAME (
*de5d74c2SJerry Jelinek                &(AcpiGbl_RootTableList.Tables[i].Signature), Signature))
db2bae30SDana Myers        {
db2bae30SDana Myers            continue;
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        if (++j < Instance)
db2bae30SDana Myers        {
db2bae30SDana Myers            continue;
db2bae30SDana Myers        }
db2bae30SDana Myers
*de5d74c2SJerry Jelinek        Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[i]);
db2bae30SDana Myers        if (ACPI_SUCCESS (Status))
db2bae30SDana Myers        {
db2bae30SDana Myers            *OutTable = AcpiGbl_RootTableList.Tables[i].Pointer;
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        return (Status);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return (AE_NOT_FOUND);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana MyersACPI_EXPORT_SYMBOL (AcpiGetTable)
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiGetTableByIndex
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  TableIndex          - Table index
db2bae30SDana Myers *              Table               - Where the pointer to the table is returned
db2bae30SDana Myers *
*de5d74c2SJerry Jelinek * RETURN:      Status and pointer to the requested table
db2bae30SDana Myers *
*de5d74c2SJerry Jelinek * DESCRIPTION: Obtain a table by an index into the global table list. Used
*de5d74c2SJerry Jelinek *              internally also.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiGetTableByIndex (
db2bae30SDana Myers    UINT32                  TableIndex,
db2bae30SDana Myers    ACPI_TABLE_HEADER       **Table)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (AcpiGetTableByIndex);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Parameter validation */
db2bae30SDana Myers
db2bae30SDana Myers    if (!Table)
db2bae30SDana Myers    {
db2bae30SDana Myers        return_ACPI_STATUS (AE_BAD_PARAMETER);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
db2bae30SDana Myers
db2bae30SDana Myers    /* Validate index */
db2bae30SDana Myers
26f3cdf0SGordon Ross    if (TableIndex >= AcpiGbl_RootTableList.CurrentTableCount)
db2bae30SDana Myers    {
db2bae30SDana Myers        (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
db2bae30SDana Myers        return_ACPI_STATUS (AE_BAD_PARAMETER);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    if (!AcpiGbl_RootTableList.Tables[TableIndex].Pointer)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Table is not mapped, map it */
db2bae30SDana Myers
*de5d74c2SJerry Jelinek        Status = AcpiTbValidateTable (
*de5d74c2SJerry Jelinek            &AcpiGbl_RootTableList.Tables[TableIndex]);
db2bae30SDana Myers        if (ACPI_FAILURE (Status))
db2bae30SDana Myers        {
db2bae30SDana Myers            (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
db2bae30SDana Myers            return_ACPI_STATUS (Status);
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    *Table = AcpiGbl_RootTableList.Tables[TableIndex].Pointer;
db2bae30SDana Myers    (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
db2bae30SDana Myers    return_ACPI_STATUS (AE_OK);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana MyersACPI_EXPORT_SYMBOL (AcpiGetTableByIndex)
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiInstallTableHandler
ae115bc7Smrj *
db2bae30SDana Myers * PARAMETERS:  Handler         - Table event handler
db2bae30SDana Myers *              Context         - Value passed to the handler on each event
ae115bc7Smrj *
ae115bc7Smrj * RETURN:      Status
ae115bc7Smrj *
*de5d74c2SJerry Jelinek * DESCRIPTION: Install a global table event handler.
ae115bc7Smrj *
ae115bc7Smrj ******************************************************************************/
ae115bc7Smrj
ae115bc7SmrjACPI_STATUS
db2bae30SDana MyersAcpiInstallTableHandler (
db2bae30SDana Myers    ACPI_TABLE_HANDLER      Handler,
db2bae30SDana Myers    void                    *Context)
ae115bc7Smrj{
ae115bc7Smrj    ACPI_STATUS             Status;
ae115bc7Smrj
ae115bc7Smrj
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (AcpiInstallTableHandler);
ae115bc7Smrj
ae115bc7Smrj
db2bae30SDana Myers    if (!Handler)
ae115bc7Smrj    {
ae115bc7Smrj        return_ACPI_STATUS (AE_BAD_PARAMETER);
ae115bc7Smrj    }
ae115bc7Smrj
db2bae30SDana Myers    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
ae115bc7Smrj    if (ACPI_FAILURE (Status))
ae115bc7Smrj    {
ae115bc7Smrj        return_ACPI_STATUS (Status);
ae115bc7Smrj    }
ae115bc7Smrj
db2bae30SDana Myers    /* Don't allow more than one handler */
ae115bc7Smrj
db2bae30SDana Myers    if (AcpiGbl_TableHandler)
ae115bc7Smrj    {
db2bae30SDana Myers        Status = AE_ALREADY_EXISTS;
db2bae30SDana Myers        goto Cleanup;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Install the handler */
db2bae30SDana Myers
db2bae30SDana Myers    AcpiGbl_TableHandler = Handler;
db2bae30SDana Myers    AcpiGbl_TableHandlerContext = Context;
db2bae30SDana Myers
db2bae30SDana MyersCleanup:
db2bae30SDana Myers    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
ae115bc7Smrj    return_ACPI_STATUS (Status);
ae115bc7Smrj}
ae115bc7Smrj
db2bae30SDana MyersACPI_EXPORT_SYMBOL (AcpiInstallTableHandler)
ae115bc7Smrj
ae115bc7Smrj
ae115bc7Smrj/*******************************************************************************
ae115bc7Smrj *
db2bae30SDana Myers * FUNCTION:    AcpiRemoveTableHandler
ae115bc7Smrj *
db2bae30SDana Myers * PARAMETERS:  Handler         - Table event handler that was installed
db2bae30SDana Myers *                                previously.
ae115bc7Smrj *
ae115bc7Smrj * RETURN:      Status
ae115bc7Smrj *
*de5d74c2SJerry Jelinek * DESCRIPTION: Remove a table event handler
ae115bc7Smrj *
ae115bc7Smrj ******************************************************************************/
ae115bc7Smrj
ae115bc7SmrjACPI_STATUS
db2bae30SDana MyersAcpiRemoveTableHandler (
db2bae30SDana Myers    ACPI_TABLE_HANDLER      Handler)
ae115bc7Smrj{
ae115bc7Smrj    ACPI_STATUS             Status;
ae115bc7Smrj
ae115bc7Smrj
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (AcpiRemoveTableHandler);
ae115bc7Smrj
ae115bc7Smrj
db2bae30SDana Myers    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
ae115bc7Smrj    if (ACPI_FAILURE (Status))
ae115bc7Smrj    {
ae115bc7Smrj        return_ACPI_STATUS (Status);
ae115bc7Smrj    }
ae115bc7Smrj
db2bae30SDana Myers    /* Make sure that the installed handler is the same */
ae115bc7Smrj
db2bae30SDana Myers    if (!Handler ||
db2bae30SDana Myers        Handler != AcpiGbl_TableHandler)
ae115bc7Smrj    {
db2bae30SDana Myers        Status = AE_BAD_PARAMETER;
db2bae30SDana Myers        goto Cleanup;
ae115bc7Smrj    }
ae115bc7Smrj
db2bae30SDana Myers    /* Remove the handler */
ae115bc7Smrj
db2bae30SDana Myers    AcpiGbl_TableHandler = NULL;
ae115bc7Smrj
db2bae30SDana MyersCleanup:
db2bae30SDana Myers    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
ae115bc7Smrj    return_ACPI_STATUS (Status);
ae115bc7Smrj}
ae115bc7Smrj
db2bae30SDana MyersACPI_EXPORT_SYMBOL (AcpiRemoveTableHandler)