526 lines
17 KiB
C
526 lines
17 KiB
C
/******************************************************************************
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*
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* Module Name: tbinstal - ACPI table installation and removal
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2015, 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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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <contrib/dev/acpica/include/actables.h>
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME ("tbinstal")
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/* Local prototypes */
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static BOOLEAN
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AcpiTbCompareTables (
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ACPI_TABLE_DESC *TableDesc,
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UINT32 TableIndex);
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbCompareTables
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*
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* PARAMETERS: TableDesc - Table 1 descriptor to be compared
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* TableIndex - Index of table 2 to be compared
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*
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* RETURN: TRUE if both tables are identical.
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*
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* DESCRIPTION: This function compares a table with another table that has
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* already been installed in the root table list.
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*
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******************************************************************************/
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static BOOLEAN
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AcpiTbCompareTables (
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ACPI_TABLE_DESC *TableDesc,
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UINT32 TableIndex)
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{
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ACPI_STATUS Status = AE_OK;
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BOOLEAN IsIdentical;
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ACPI_TABLE_HEADER *Table;
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UINT32 TableLength;
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UINT8 TableFlags;
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Status = AcpiTbAcquireTable (&AcpiGbl_RootTableList.Tables[TableIndex],
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&Table, &TableLength, &TableFlags);
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if (ACPI_FAILURE (Status))
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{
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return (FALSE);
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}
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/*
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* Check for a table match on the entire table length,
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* not just the header.
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*/
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IsIdentical = (BOOLEAN)((TableDesc->Length != TableLength ||
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memcmp (TableDesc->Pointer, Table, TableLength)) ?
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FALSE : TRUE);
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/* Release the acquired table */
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AcpiTbReleaseTable (Table, TableLength, TableFlags);
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return (IsIdentical);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbInstallTableWithOverride
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*
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* PARAMETERS: NewTableDesc - New table descriptor to install
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* Override - Whether override should be performed
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* TableIndex - Where the table index is returned
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*
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* RETURN: None
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*
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* DESCRIPTION: Install an ACPI table into the global data structure. The
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* table override mechanism is called to allow the host
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* OS to replace any table before it is installed in the root
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* table array.
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*
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******************************************************************************/
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void
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AcpiTbInstallTableWithOverride (
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ACPI_TABLE_DESC *NewTableDesc,
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BOOLEAN Override,
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UINT32 *TableIndex)
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{
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UINT32 i;
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ACPI_STATUS Status;
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Status = AcpiTbGetNextTableDescriptor (&i, NULL);
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if (ACPI_FAILURE (Status))
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{
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return;
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}
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/*
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* ACPI Table Override:
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*
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* Before we install the table, let the host OS override it with a new
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* one if desired. Any table within the RSDT/XSDT can be replaced,
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* including the DSDT which is pointed to by the FADT.
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*/
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if (Override)
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{
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AcpiTbOverrideTable (NewTableDesc);
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}
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AcpiTbInitTableDescriptor (&AcpiGbl_RootTableList.Tables[i],
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NewTableDesc->Address, NewTableDesc->Flags, NewTableDesc->Pointer);
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AcpiTbPrintTableHeader (NewTableDesc->Address, NewTableDesc->Pointer);
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/* This synchronizes AcpiGbl_DsdtIndex */
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*TableIndex = i;
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/* Set the global integer width (based upon revision of the DSDT) */
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if (i == AcpiGbl_DsdtIndex)
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{
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AcpiUtSetIntegerWidth (NewTableDesc->Pointer->Revision);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbInstallFixedTable
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*
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* PARAMETERS: Address - Physical address of DSDT or FACS
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* Signature - Table signature, NULL if no need to
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* match
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* TableIndex - Where the table index is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a fixed ACPI table (DSDT/FACS) into the global data
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* structure.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbInstallFixedTable (
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ACPI_PHYSICAL_ADDRESS Address,
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char *Signature,
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UINT32 *TableIndex)
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{
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ACPI_TABLE_DESC NewTableDesc;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (TbInstallFixedTable);
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if (!Address)
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{
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ACPI_ERROR ((AE_INFO, "Null physical address for ACPI table [%s]",
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Signature));
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return (AE_NO_MEMORY);
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}
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/* Fill a table descriptor for validation */
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Status = AcpiTbAcquireTempTable (&NewTableDesc, Address,
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ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO, "Could not acquire table length at %8.8X%8.8X",
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ACPI_FORMAT_UINT64 (Address)));
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return_ACPI_STATUS (Status);
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}
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/* Validate and verify a table before installation */
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Status = AcpiTbVerifyTempTable (&NewTableDesc, Signature);
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if (ACPI_FAILURE (Status))
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{
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goto ReleaseAndExit;
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}
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/* Add the table to the global root table list */
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AcpiTbInstallTableWithOverride (&NewTableDesc, TRUE, TableIndex);
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ReleaseAndExit:
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/* Release the temporary table descriptor */
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AcpiTbReleaseTempTable (&NewTableDesc);
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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: AcpiTbInstallStandardTable
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*
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* PARAMETERS: Address - Address of the table (might be a virtual
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* address depending on the TableFlags)
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* Flags - Flags for the table
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* Reload - Whether reload should be performed
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* Override - Whether override should be performed
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* TableIndex - Where the table index is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to install an ACPI table that is
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* neither DSDT nor FACS (a "standard" table.)
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* When this function is called by "Load" or "LoadTable" opcodes,
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* or by AcpiLoadTable() API, the "Reload" parameter is set.
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* After sucessfully returning from this function, table is
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* "INSTALLED" but not "VALIDATED".
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbInstallStandardTable (
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ACPI_PHYSICAL_ADDRESS Address,
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UINT8 Flags,
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BOOLEAN Reload,
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BOOLEAN Override,
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UINT32 *TableIndex)
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{
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UINT32 i;
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ACPI_STATUS Status = AE_OK;
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ACPI_TABLE_DESC NewTableDesc;
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ACPI_FUNCTION_TRACE (TbInstallStandardTable);
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/* Acquire a temporary table descriptor for validation */
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Status = AcpiTbAcquireTempTable (&NewTableDesc, Address, Flags);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO, "Could not acquire table length at %8.8X%8.8X",
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ACPI_FORMAT_UINT64 (Address)));
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return_ACPI_STATUS (Status);
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}
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/*
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* Optionally do not load any SSDTs from the RSDT/XSDT. This can
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* be useful for debugging ACPI problems on some machines.
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*/
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if (!Reload &&
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AcpiGbl_DisableSsdtTableInstall &&
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ACPI_COMPARE_NAME (&NewTableDesc.Signature, ACPI_SIG_SSDT))
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{
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ACPI_INFO ((AE_INFO, "Ignoring installation of %4.4s at %8.8X%8.8X",
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NewTableDesc.Signature.Ascii, ACPI_FORMAT_UINT64 (Address)));
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goto ReleaseAndExit;
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}
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/* Validate and verify a table before installation */
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Status = AcpiTbVerifyTempTable (&NewTableDesc, NULL);
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if (ACPI_FAILURE (Status))
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{
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goto ReleaseAndExit;
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}
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if (Reload)
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{
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/*
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* Validate the incoming table signature.
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*
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* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
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* 2) We added support for OEMx tables, signature "OEM".
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* 3) Valid tables were encountered with a null signature, so we just
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* gave up on validating the signature, (05/2008).
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* 4) We encountered non-AML tables such as the MADT, which caused
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* interpreter errors and kernel faults. So now, we once again allow
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* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
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*/
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if ((NewTableDesc.Signature.Ascii[0] != 0x00) &&
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(!ACPI_COMPARE_NAME (&NewTableDesc.Signature, ACPI_SIG_SSDT)) &&
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(strncmp (NewTableDesc.Signature.Ascii, "OEM", 3)))
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{
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ACPI_BIOS_ERROR ((AE_INFO,
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"Table has invalid signature [%4.4s] (0x%8.8X), "
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"must be SSDT or OEMx",
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AcpiUtValidAcpiName (NewTableDesc.Signature.Ascii) ?
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NewTableDesc.Signature.Ascii : "????",
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NewTableDesc.Signature.Integer));
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Status = AE_BAD_SIGNATURE;
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goto ReleaseAndExit;
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}
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/* Check if table is already registered */
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for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
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{
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/*
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* Check for a table match on the entire table length,
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* not just the header.
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*/
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if (!AcpiTbCompareTables (&NewTableDesc, i))
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{
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continue;
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}
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/*
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* Note: the current mechanism does not unregister a table if it is
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* dynamically unloaded. The related namespace entries are deleted,
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* but the table remains in the root table list.
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*
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* The assumption here is that the number of different tables that
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* will be loaded is actually small, and there is minimal overhead
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* in just keeping the table in case it is needed again.
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*
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* If this assumption changes in the future (perhaps on large
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* machines with many table load/unload operations), tables will
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* need to be unregistered when they are unloaded, and slots in the
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* root table list should be reused when empty.
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*/
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if (AcpiGbl_RootTableList.Tables[i].Flags & ACPI_TABLE_IS_LOADED)
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{
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/* Table is still loaded, this is an error */
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Status = AE_ALREADY_EXISTS;
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goto ReleaseAndExit;
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}
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else
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{
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/*
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* Table was unloaded, allow it to be reloaded.
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* As we are going to return AE_OK to the caller, we should
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* take the responsibility of freeing the input descriptor.
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* Refill the input descriptor to ensure
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* AcpiTbInstallTableWithOverride() can be called again to
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* indicate the re-installation.
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*/
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AcpiTbUninstallTable (&NewTableDesc);
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*TableIndex = i;
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return_ACPI_STATUS (AE_OK);
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}
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}
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}
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/* Add the table to the global root table list */
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AcpiTbInstallTableWithOverride (&NewTableDesc, Override, TableIndex);
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ReleaseAndExit:
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/* Release the temporary table descriptor */
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AcpiTbReleaseTempTable (&NewTableDesc);
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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: AcpiTbOverrideTable
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*
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* PARAMETERS: OldTableDesc - Validated table descriptor to be
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* overridden
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*
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* RETURN: None
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*
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* DESCRIPTION: Attempt table override by calling the OSL override functions.
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* Note: If the table is overridden, then the entire new table
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* is acquired and returned by this function.
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* Before/after invocation, the table descriptor is in a state
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* that is "VALIDATED".
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*
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******************************************************************************/
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void
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AcpiTbOverrideTable (
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ACPI_TABLE_DESC *OldTableDesc)
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{
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ACPI_STATUS Status;
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char *OverrideType;
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ACPI_TABLE_DESC NewTableDesc;
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ACPI_TABLE_HEADER *Table;
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ACPI_PHYSICAL_ADDRESS Address;
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UINT32 Length;
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/* (1) Attempt logical override (returns a logical address) */
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Status = AcpiOsTableOverride (OldTableDesc->Pointer, &Table);
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if (ACPI_SUCCESS (Status) && Table)
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{
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AcpiTbAcquireTempTable (&NewTableDesc, ACPI_PTR_TO_PHYSADDR (Table),
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ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL);
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OverrideType = "Logical";
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goto FinishOverride;
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}
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/* (2) Attempt physical override (returns a physical address) */
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Status = AcpiOsPhysicalTableOverride (OldTableDesc->Pointer,
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&Address, &Length);
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if (ACPI_SUCCESS (Status) && Address && Length)
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{
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AcpiTbAcquireTempTable (&NewTableDesc, Address,
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ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
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OverrideType = "Physical";
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goto FinishOverride;
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}
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return; /* There was no override */
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FinishOverride:
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/* Validate and verify a table before overriding */
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Status = AcpiTbVerifyTempTable (&NewTableDesc, NULL);
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if (ACPI_FAILURE (Status))
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{
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return;
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}
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ACPI_INFO ((AE_INFO, "%4.4s 0x%8.8X%8.8X"
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" %s table override, new table: 0x%8.8X%8.8X",
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OldTableDesc->Signature.Ascii,
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ACPI_FORMAT_UINT64 (OldTableDesc->Address),
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OverrideType, ACPI_FORMAT_UINT64 (NewTableDesc.Address)));
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/* We can now uninstall the original table */
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AcpiTbUninstallTable (OldTableDesc);
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/*
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* Replace the original table descriptor and keep its state as
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* "VALIDATED".
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*/
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AcpiTbInitTableDescriptor (OldTableDesc, NewTableDesc.Address,
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NewTableDesc.Flags, NewTableDesc.Pointer);
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AcpiTbValidateTempTable (OldTableDesc);
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/* Release the temporary table descriptor */
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AcpiTbReleaseTempTable (&NewTableDesc);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbUninstallTable
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*
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* PARAMETERS: TableDesc - Table descriptor
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete one internal ACPI table
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*
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******************************************************************************/
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void
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AcpiTbUninstallTable (
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ACPI_TABLE_DESC *TableDesc)
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{
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ACPI_FUNCTION_TRACE (TbUninstallTable);
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/* Table must be installed */
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if (!TableDesc->Address)
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{
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return_VOID;
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}
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AcpiTbInvalidateTable (TableDesc);
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if ((TableDesc->Flags & ACPI_TABLE_ORIGIN_MASK) ==
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ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL)
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{
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ACPI_FREE (ACPI_PHYSADDR_TO_PTR (TableDesc->Address));
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}
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TableDesc->Address = ACPI_PTR_TO_PHYSADDR (NULL);
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return_VOID;
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}
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