461 lines
13 KiB
C
461 lines
13 KiB
C
/******************************************************************************
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*
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* Module Name: tbxfload - Table load/unload external interfaces
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define EXPORT_ACPI_INTERFACES
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "actables.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME ("tbxfload")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiTbLoadNamespace (
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void);
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/*******************************************************************************
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*
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* FUNCTION: AcpiLoadTables
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiLoadTables (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiLoadTables);
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/* Load the namespace from the tables */
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Status = AcpiTbLoadNamespace ();
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"While loading namespace from ACPI tables"));
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}
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL_INIT (AcpiLoadTables)
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbLoadNamespace
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
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* the RSDT/XSDT.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiTbLoadNamespace (
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void)
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{
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ACPI_STATUS Status;
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UINT32 i;
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ACPI_TABLE_HEADER *NewDsdt;
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ACPI_FUNCTION_TRACE (TbLoadNamespace);
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(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
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/*
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* Load the namespace. The DSDT is required, but any SSDT and
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* PSDT tables are optional. Verify the DSDT.
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*/
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if (!AcpiGbl_RootTableList.CurrentTableCount ||
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!ACPI_COMPARE_NAME (
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&(AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Signature),
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ACPI_SIG_DSDT) ||
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ACPI_FAILURE (AcpiTbValidateTable (
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&AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT])))
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{
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Status = AE_NO_ACPI_TABLES;
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goto UnlockAndExit;
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}
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/*
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* Save the DSDT pointer for simple access. This is the mapped memory
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* address. We must take care here because the address of the .Tables
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* array can change dynamically as tables are loaded at run-time. Note:
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* .Pointer field is not validated until after call to AcpiTbValidateTable.
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*/
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AcpiGbl_DSDT = AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Pointer;
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/*
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* Optionally copy the entire DSDT to local memory (instead of simply
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* mapping it.) There are some BIOSs that corrupt or replace the original
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* DSDT, creating the need for this option. Default is FALSE, do not copy
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* the DSDT.
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*/
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if (AcpiGbl_CopyDsdtLocally)
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{
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NewDsdt = AcpiTbCopyDsdt (ACPI_TABLE_INDEX_DSDT);
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if (NewDsdt)
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{
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AcpiGbl_DSDT = NewDsdt;
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}
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}
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/*
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* Save the original DSDT header for detection of table corruption
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* and/or replacement of the DSDT from outside the OS.
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*/
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ACPI_MEMCPY (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT,
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sizeof (ACPI_TABLE_HEADER));
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(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
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/* Load and parse tables */
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Status = AcpiNsLoadTable (ACPI_TABLE_INDEX_DSDT, AcpiGbl_RootNode);
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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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/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
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(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
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for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
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{
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if ((!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
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ACPI_SIG_SSDT) &&
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!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
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ACPI_SIG_PSDT)) ||
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ACPI_FAILURE (AcpiTbValidateTable (
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&AcpiGbl_RootTableList.Tables[i])))
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{
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continue;
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}
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/* Ignore errors while loading tables, get as many as possible */
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(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
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(void) AcpiNsLoadTable (i, AcpiGbl_RootNode);
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(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
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}
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ACPI_INFO ((AE_INFO, "All ACPI Tables successfully acquired"));
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
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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: AcpiInstallTable
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*
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* PARAMETERS: Address - Address of the ACPI table to be installed.
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* Physical - Whether the address is a physical table
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* address or not
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dynamically install an ACPI table.
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* Note: This function should only be invoked after
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* AcpiInitializeTables() and before AcpiLoadTables().
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiInstallTable (
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ACPI_PHYSICAL_ADDRESS Address,
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BOOLEAN Physical)
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{
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ACPI_STATUS Status;
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UINT8 Flags;
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UINT32 TableIndex;
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ACPI_FUNCTION_TRACE (AcpiInstallTable);
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if (Physical)
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{
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Flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL;
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}
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else
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{
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Flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL;
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}
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Status = AcpiTbInstallStandardTable (Address, Flags,
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FALSE, FALSE, &TableIndex);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL_INIT (AcpiInstallTable)
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/*******************************************************************************
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*
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* FUNCTION: AcpiLoadTable
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*
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* PARAMETERS: Table - Pointer to a buffer containing the ACPI
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* table to be loaded.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
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* be a valid ACPI table with a valid ACPI table header.
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* Note1: Mainly intended to support hotplug addition of SSDTs.
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* Note2: Does not copy the incoming table. User is responsible
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* to ensure that the table is not deleted or unmapped.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiLoadTable (
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ACPI_TABLE_HEADER *Table)
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{
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ACPI_STATUS Status;
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UINT32 TableIndex;
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ACPI_FUNCTION_TRACE (AcpiLoadTable);
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/* Parameter validation */
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if (!Table)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Must acquire the interpreter lock during this operation */
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Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
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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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/* Install the table and load it into the namespace */
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ACPI_INFO ((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
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(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
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Status = AcpiTbInstallStandardTable (ACPI_PTR_TO_PHYSADDR (Table),
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ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, TRUE, FALSE,
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&TableIndex);
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(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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/*
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* Note: Now table is "INSTALLED", it must be validated before
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* using.
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*/
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Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[TableIndex]);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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Status = AcpiNsLoadTable (TableIndex, AcpiGbl_RootNode);
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/* Invoke table handler if present */
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if (AcpiGbl_TableHandler)
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{
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(void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table,
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AcpiGbl_TableHandlerContext);
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}
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiLoadTable)
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/*******************************************************************************
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*
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* FUNCTION: AcpiUnloadParentTable
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*
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* PARAMETERS: Object - Handle to any namespace object owned by
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* the table to be unloaded
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*
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* RETURN: Status
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*
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* DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
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* the table and deletes all namespace objects associated with
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* that table. Unloading of the DSDT is not allowed.
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* Note: Mainly intended to support hotplug removal of SSDTs.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUnloadParentTable (
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ACPI_HANDLE Object)
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{
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ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object);
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ACPI_STATUS Status = AE_NOT_EXIST;
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ACPI_OWNER_ID OwnerId;
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UINT32 i;
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ACPI_FUNCTION_TRACE (AcpiUnloadParentTable);
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/* Parameter validation */
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if (!Object)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* The node OwnerId is currently the same as the parent table ID.
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* However, this could change in the future.
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*/
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OwnerId = Node->OwnerId;
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if (!OwnerId)
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{
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/* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */
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return_ACPI_STATUS (AE_TYPE);
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}
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/* Must acquire the interpreter lock during this operation */
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Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
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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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/* Find the table in the global table list */
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for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
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{
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if (OwnerId != AcpiGbl_RootTableList.Tables[i].OwnerId)
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{
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continue;
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}
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/*
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* Allow unload of SSDT and OEMx tables only. Do not allow unload
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* of the DSDT. No other types of tables should get here, since
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* only these types can contain AML and thus are the only types
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* that can create namespace objects.
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*/
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if (ACPI_COMPARE_NAME (
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AcpiGbl_RootTableList.Tables[i].Signature.Ascii,
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ACPI_SIG_DSDT))
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{
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Status = AE_TYPE;
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break;
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}
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/* Ensure the table is actually loaded */
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if (!AcpiTbIsTableLoaded (i))
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{
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Status = AE_NOT_EXIST;
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break;
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}
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/* Invoke table handler if present */
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if (AcpiGbl_TableHandler)
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{
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(void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD,
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AcpiGbl_RootTableList.Tables[i].Pointer,
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AcpiGbl_TableHandlerContext);
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}
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/*
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* Delete all namespace objects owned by this table. Note that
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* these objects can appear anywhere in the namespace by virtue
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* of the AML "Scope" operator. Thus, we need to track ownership
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* by an ID, not simply a position within the hierarchy.
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*/
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Status = AcpiTbDeleteNamespaceByOwner (i);
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if (ACPI_FAILURE (Status))
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{
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break;
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}
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Status = AcpiTbReleaseOwnerId (i);
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AcpiTbSetTableLoadedFlag (i, FALSE);
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break;
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}
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(void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable)
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