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825 lines
26 KiB
C
825 lines
26 KiB
C
/******************************************************************************
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*
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* Module Name: tbutils - table utilities
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __TBUTILS_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "actables.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME ("tbutils")
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/* Local prototypes */
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static void
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AcpiTbFixString (
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char *String,
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ACPI_SIZE Length);
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static void
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AcpiTbCleanupTableHeader (
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ACPI_TABLE_HEADER *OutHeader,
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ACPI_TABLE_HEADER *Header);
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static ACPI_PHYSICAL_ADDRESS
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AcpiTbGetRootTableEntry (
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UINT8 *TableEntry,
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UINT32 TableEntrySize);
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbInitializeFacs
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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: Create a permanent mapping for the FADT and save it in a global
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* for accessing the Global Lock and Firmware Waking Vector
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbInitializeFacs (
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void)
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{
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ACPI_STATUS Status;
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Status = AcpiGetTableByIndex (ACPI_TABLE_INDEX_FACS,
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ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &AcpiGbl_FACS));
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return (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbTablesLoaded
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*
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* PARAMETERS: None
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*
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* RETURN: TRUE if required ACPI tables are loaded
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*
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* DESCRIPTION: Determine if the minimum required ACPI tables are present
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* (FADT, FACS, DSDT)
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*
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******************************************************************************/
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BOOLEAN
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AcpiTbTablesLoaded (
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void)
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{
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if (AcpiGbl_RootTableList.CurrentTableCount >= 3)
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{
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return (TRUE);
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbFixString
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*
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* PARAMETERS: String - String to be repaired
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* Length - Maximum length
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*
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* RETURN: None
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*
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* DESCRIPTION: Replace every non-printable or non-ascii byte in the string
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* with a question mark '?'.
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*
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******************************************************************************/
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static void
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AcpiTbFixString (
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char *String,
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ACPI_SIZE Length)
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{
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while (Length && *String)
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{
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if (!ACPI_IS_PRINT (*String))
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{
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*String = '?';
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}
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String++;
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Length--;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbCleanupTableHeader
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*
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* PARAMETERS: OutHeader - Where the cleaned header is returned
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* Header - Input ACPI table header
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*
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* RETURN: Returns the cleaned header in OutHeader
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*
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* DESCRIPTION: Copy the table header and ensure that all "string" fields in
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* the header consist of printable characters.
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*
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******************************************************************************/
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static void
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AcpiTbCleanupTableHeader (
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ACPI_TABLE_HEADER *OutHeader,
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ACPI_TABLE_HEADER *Header)
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{
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ACPI_MEMCPY (OutHeader, Header, sizeof (ACPI_TABLE_HEADER));
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AcpiTbFixString (OutHeader->Signature, ACPI_NAME_SIZE);
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AcpiTbFixString (OutHeader->OemId, ACPI_OEM_ID_SIZE);
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AcpiTbFixString (OutHeader->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
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AcpiTbFixString (OutHeader->AslCompilerId, ACPI_NAME_SIZE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbPrintTableHeader
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*
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* PARAMETERS: Address - Table physical address
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* Header - Table header
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*
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* RETURN: None
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*
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* DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP.
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*
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******************************************************************************/
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void
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AcpiTbPrintTableHeader (
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ACPI_PHYSICAL_ADDRESS Address,
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ACPI_TABLE_HEADER *Header)
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{
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ACPI_TABLE_HEADER LocalHeader;
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/*
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* The reason that the Address is cast to a void pointer is so that we
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* can use %p which will work properly on both 32-bit and 64-bit hosts.
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*/
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if (ACPI_COMPARE_NAME (Header->Signature, ACPI_SIG_FACS))
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{
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/* FACS only has signature and length fields */
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ACPI_INFO ((AE_INFO, "%4.4s %p %05X",
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Header->Signature, ACPI_CAST_PTR (void, Address),
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Header->Length));
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}
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else if (ACPI_COMPARE_NAME (Header->Signature, ACPI_SIG_RSDP))
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{
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/* RSDP has no common fields */
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ACPI_MEMCPY (LocalHeader.OemId,
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ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->OemId, ACPI_OEM_ID_SIZE);
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AcpiTbFixString (LocalHeader.OemId, ACPI_OEM_ID_SIZE);
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ACPI_INFO ((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)",
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ACPI_CAST_PTR (void, Address),
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(ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision > 0) ?
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ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Length : 20,
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ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision,
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LocalHeader.OemId));
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}
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else
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{
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/* Standard ACPI table with full common header */
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AcpiTbCleanupTableHeader (&LocalHeader, Header);
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ACPI_INFO ((AE_INFO,
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"%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)",
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LocalHeader.Signature, ACPI_CAST_PTR (void, Address),
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LocalHeader.Length, LocalHeader.Revision, LocalHeader.OemId,
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LocalHeader.OemTableId, LocalHeader.OemRevision,
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LocalHeader.AslCompilerId, LocalHeader.AslCompilerRevision));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbValidateChecksum
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*
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* PARAMETERS: Table - ACPI table to verify
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* Length - Length of entire table
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*
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* RETURN: Status
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*
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* DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
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* exception on bad checksum.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbVerifyChecksum (
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ACPI_TABLE_HEADER *Table,
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UINT32 Length)
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{
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UINT8 Checksum;
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/* Compute the checksum on the table */
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Checksum = AcpiTbChecksum (ACPI_CAST_PTR (UINT8, Table), Length);
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/* Checksum ok? (should be zero) */
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if (Checksum)
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{
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ACPI_WARNING ((AE_INFO,
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"Incorrect checksum in table [%4.4s] - 0x%2.2X, should be 0x%2.2X",
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Table->Signature, Table->Checksum,
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(UINT8) (Table->Checksum - Checksum)));
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#if (ACPI_CHECKSUM_ABORT)
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return (AE_BAD_CHECKSUM);
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#endif
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbChecksum
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*
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* PARAMETERS: Buffer - Pointer to memory region to be checked
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* Length - Length of this memory region
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*
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* RETURN: Checksum (UINT8)
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*
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* DESCRIPTION: Calculates circular checksum of memory region.
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*
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******************************************************************************/
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UINT8
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AcpiTbChecksum (
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UINT8 *Buffer,
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UINT32 Length)
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{
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UINT8 Sum = 0;
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UINT8 *End = Buffer + Length;
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while (Buffer < End)
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{
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Sum = (UINT8) (Sum + *(Buffer++));
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}
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return Sum;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbCheckDsdtHeader
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Quick compare to check validity of the DSDT. This will detect
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* if the DSDT has been replaced from outside the OS and/or if
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* the DSDT header has been corrupted.
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*
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******************************************************************************/
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void
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AcpiTbCheckDsdtHeader (
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void)
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{
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/* Compare original length and checksum to current values */
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if (AcpiGbl_OriginalDsdtHeader.Length != AcpiGbl_DSDT->Length ||
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AcpiGbl_OriginalDsdtHeader.Checksum != AcpiGbl_DSDT->Checksum)
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{
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ACPI_ERROR ((AE_INFO,
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"The DSDT has been corrupted or replaced - old, new headers below"));
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AcpiTbPrintTableHeader (0, &AcpiGbl_OriginalDsdtHeader);
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AcpiTbPrintTableHeader (0, AcpiGbl_DSDT);
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/* Disable further error messages */
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AcpiGbl_OriginalDsdtHeader.Length = AcpiGbl_DSDT->Length;
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AcpiGbl_OriginalDsdtHeader.Checksum = AcpiGbl_DSDT->Checksum;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbCopyDsdt
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*
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* PARAMETERS: TableDesc - Installed table to copy
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*
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* RETURN: None
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*
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* DESCRIPTION: Implements a subsystem option to copy the DSDT to local memory.
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* Some very bad BIOSs are known to either corrupt the DSDT or
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* install a new, bad DSDT. This copy works around the problem.
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*
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******************************************************************************/
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ACPI_TABLE_HEADER *
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AcpiTbCopyDsdt (
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UINT32 TableIndex)
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{
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ACPI_TABLE_HEADER *NewTable;
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ACPI_TABLE_DESC *TableDesc;
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TableDesc = &AcpiGbl_RootTableList.Tables[TableIndex];
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NewTable = ACPI_ALLOCATE (TableDesc->Length);
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if (!NewTable)
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{
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ACPI_ERROR ((AE_INFO, "Could not copy DSDT of length 0x%X",
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TableDesc->Length));
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return (NULL);
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}
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ACPI_MEMCPY (NewTable, TableDesc->Pointer, TableDesc->Length);
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AcpiTbDeleteTable (TableDesc);
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TableDesc->Pointer = NewTable;
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TableDesc->Flags = ACPI_TABLE_ORIGIN_ALLOCATED;
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ACPI_INFO ((AE_INFO,
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"Forced DSDT copy: length 0x%05X copied locally, original unmapped",
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NewTable->Length));
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return (NewTable);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbInstallTable
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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 - Index into root table array
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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 implemented here 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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AcpiTbInstallTable (
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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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UINT8 Flags;
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ACPI_STATUS Status;
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ACPI_TABLE_HEADER *TableToInstall;
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ACPI_TABLE_HEADER *MappedTable;
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ACPI_TABLE_HEADER *OverrideTable = NULL;
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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;
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}
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/* Map just the table header */
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MappedTable = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER));
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if (!MappedTable)
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{
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return;
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}
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/* If a particular signature is expected (DSDT/FACS), it must match */
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if (Signature &&
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!ACPI_COMPARE_NAME (MappedTable->Signature, Signature))
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{
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ACPI_ERROR ((AE_INFO,
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"Invalid signature 0x%X for ACPI table, expected [%s]",
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*ACPI_CAST_PTR (UINT32, MappedTable->Signature), Signature));
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goto UnmapAndExit;
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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,
|
|
* including the DSDT which is pointed to by the FADT.
|
|
*/
|
|
Status = AcpiOsTableOverride (MappedTable, &OverrideTable);
|
|
if (ACPI_SUCCESS (Status) && OverrideTable)
|
|
{
|
|
ACPI_INFO ((AE_INFO,
|
|
"%4.4s @ 0x%p Table override, replaced with:",
|
|
MappedTable->Signature, ACPI_CAST_PTR (void, Address)));
|
|
|
|
AcpiGbl_RootTableList.Tables[TableIndex].Pointer = OverrideTable;
|
|
Address = ACPI_PTR_TO_PHYSADDR (OverrideTable);
|
|
|
|
TableToInstall = OverrideTable;
|
|
Flags = ACPI_TABLE_ORIGIN_OVERRIDE;
|
|
}
|
|
else
|
|
{
|
|
TableToInstall = MappedTable;
|
|
Flags = ACPI_TABLE_ORIGIN_MAPPED;
|
|
}
|
|
|
|
/* Initialize the table entry */
|
|
|
|
AcpiGbl_RootTableList.Tables[TableIndex].Address = Address;
|
|
AcpiGbl_RootTableList.Tables[TableIndex].Length = TableToInstall->Length;
|
|
AcpiGbl_RootTableList.Tables[TableIndex].Flags = Flags;
|
|
|
|
ACPI_MOVE_32_TO_32 (
|
|
&(AcpiGbl_RootTableList.Tables[TableIndex].Signature),
|
|
TableToInstall->Signature);
|
|
|
|
AcpiTbPrintTableHeader (Address, TableToInstall);
|
|
|
|
if (TableIndex == ACPI_TABLE_INDEX_DSDT)
|
|
{
|
|
/* Global integer width is based upon revision of the DSDT */
|
|
|
|
AcpiUtSetIntegerWidth (TableToInstall->Revision);
|
|
}
|
|
|
|
UnmapAndExit:
|
|
AcpiOsUnmapMemory (MappedTable, sizeof (ACPI_TABLE_HEADER));
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiTbGetRootTableEntry
|
|
*
|
|
* PARAMETERS: TableEntry - Pointer to the RSDT/XSDT table entry
|
|
* TableEntrySize - sizeof 32 or 64 (RSDT or XSDT)
|
|
*
|
|
* RETURN: Physical address extracted from the root table
|
|
*
|
|
* DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on
|
|
* both 32-bit and 64-bit platforms
|
|
*
|
|
* NOTE: ACPI_PHYSICAL_ADDRESS is 32-bit on 32-bit platforms, 64-bit on
|
|
* 64-bit platforms.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_PHYSICAL_ADDRESS
|
|
AcpiTbGetRootTableEntry (
|
|
UINT8 *TableEntry,
|
|
UINT32 TableEntrySize)
|
|
{
|
|
UINT64 Address64;
|
|
|
|
|
|
/*
|
|
* Get the table physical address (32-bit for RSDT, 64-bit for XSDT):
|
|
* Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT
|
|
*/
|
|
if (TableEntrySize == sizeof (UINT32))
|
|
{
|
|
/*
|
|
* 32-bit platform, RSDT: Return 32-bit table entry
|
|
* 64-bit platform, RSDT: Expand 32-bit to 64-bit and return
|
|
*/
|
|
return ((ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST_PTR (UINT32, TableEntry)));
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return
|
|
* 64-bit platform, XSDT: Move (unaligned) 64-bit to local,
|
|
* return 64-bit
|
|
*/
|
|
ACPI_MOVE_64_TO_64 (&Address64, TableEntry);
|
|
|
|
#if ACPI_MACHINE_WIDTH == 32
|
|
if (Address64 > ACPI_UINT32_MAX)
|
|
{
|
|
/* Will truncate 64-bit address to 32 bits, issue warning */
|
|
|
|
ACPI_WARNING ((AE_INFO,
|
|
"64-bit Physical Address in XSDT is too large (0x%8.8X%8.8X),"
|
|
" truncating",
|
|
ACPI_FORMAT_UINT64 (Address64)));
|
|
}
|
|
#endif
|
|
return ((ACPI_PHYSICAL_ADDRESS) (Address64));
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiTbParseRootTable
|
|
*
|
|
* PARAMETERS: Rsdp - Pointer to the RSDP
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to parse the Root System Description
|
|
* Table (RSDT or XSDT)
|
|
*
|
|
* NOTE: Tables are mapped (not copied) for efficiency. The FACS must
|
|
* be mapped and cannot be copied because it contains the actual
|
|
* memory location of the ACPI Global Lock.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiTbParseRootTable (
|
|
ACPI_PHYSICAL_ADDRESS RsdpAddress)
|
|
{
|
|
ACPI_TABLE_RSDP *Rsdp;
|
|
UINT32 TableEntrySize;
|
|
UINT32 i;
|
|
UINT32 TableCount;
|
|
ACPI_TABLE_HEADER *Table;
|
|
ACPI_PHYSICAL_ADDRESS Address;
|
|
UINT32 Length;
|
|
UINT8 *TableEntry;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (TbParseRootTable);
|
|
|
|
|
|
/*
|
|
* Map the entire RSDP and extract the address of the RSDT or XSDT
|
|
*/
|
|
Rsdp = AcpiOsMapMemory (RsdpAddress, sizeof (ACPI_TABLE_RSDP));
|
|
if (!Rsdp)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
AcpiTbPrintTableHeader (RsdpAddress,
|
|
ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp));
|
|
|
|
/* Differentiate between RSDT and XSDT root tables */
|
|
|
|
if (Rsdp->Revision > 1 && Rsdp->XsdtPhysicalAddress)
|
|
{
|
|
/*
|
|
* Root table is an XSDT (64-bit physical addresses). We must use the
|
|
* XSDT if the revision is > 1 and the XSDT pointer is present, as per
|
|
* the ACPI specification.
|
|
*/
|
|
Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->XsdtPhysicalAddress;
|
|
TableEntrySize = sizeof (UINT64);
|
|
}
|
|
else
|
|
{
|
|
/* Root table is an RSDT (32-bit physical addresses) */
|
|
|
|
Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress;
|
|
TableEntrySize = sizeof (UINT32);
|
|
}
|
|
|
|
/*
|
|
* It is not possible to map more than one entry in some environments,
|
|
* so unmap the RSDP here before mapping other tables
|
|
*/
|
|
AcpiOsUnmapMemory (Rsdp, sizeof (ACPI_TABLE_RSDP));
|
|
|
|
|
|
/* Map the RSDT/XSDT table header to get the full table length */
|
|
|
|
Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER));
|
|
if (!Table)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
AcpiTbPrintTableHeader (Address, Table);
|
|
|
|
/* Get the length of the full table, verify length and map entire table */
|
|
|
|
Length = Table->Length;
|
|
AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER));
|
|
|
|
if (Length < sizeof (ACPI_TABLE_HEADER))
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Invalid length 0x%X in RSDT/XSDT", Length));
|
|
return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
|
|
}
|
|
|
|
Table = AcpiOsMapMemory (Address, Length);
|
|
if (!Table)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Validate the root table checksum */
|
|
|
|
Status = AcpiTbVerifyChecksum (Table, Length);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
AcpiOsUnmapMemory (Table, Length);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Calculate the number of tables described in the root table */
|
|
|
|
TableCount = (UINT32) ((Table->Length - sizeof (ACPI_TABLE_HEADER)) /
|
|
TableEntrySize);
|
|
|
|
/*
|
|
* First two entries in the table array are reserved for the DSDT
|
|
* and FACS, which are not actually present in the RSDT/XSDT - they
|
|
* come from the FADT
|
|
*/
|
|
TableEntry = ACPI_CAST_PTR (UINT8, Table) + sizeof (ACPI_TABLE_HEADER);
|
|
AcpiGbl_RootTableList.CurrentTableCount = 2;
|
|
|
|
/*
|
|
* Initialize the root table array from the RSDT/XSDT
|
|
*/
|
|
for (i = 0; i < TableCount; i++)
|
|
{
|
|
if (AcpiGbl_RootTableList.CurrentTableCount >=
|
|
AcpiGbl_RootTableList.MaxTableCount)
|
|
{
|
|
/* There is no more room in the root table array, attempt resize */
|
|
|
|
Status = AcpiTbResizeRootTableList ();
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_WARNING ((AE_INFO, "Truncating %u table entries!",
|
|
(unsigned) (TableCount -
|
|
(AcpiGbl_RootTableList.CurrentTableCount - 2))));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
|
|
|
|
AcpiGbl_RootTableList.Tables[AcpiGbl_RootTableList.CurrentTableCount].Address =
|
|
AcpiTbGetRootTableEntry (TableEntry, TableEntrySize);
|
|
|
|
TableEntry += TableEntrySize;
|
|
AcpiGbl_RootTableList.CurrentTableCount++;
|
|
}
|
|
|
|
/*
|
|
* It is not possible to map more than one entry in some environments,
|
|
* so unmap the root table here before mapping other tables
|
|
*/
|
|
AcpiOsUnmapMemory (Table, Length);
|
|
|
|
/*
|
|
* Complete the initialization of the root table array by examining
|
|
* the header of each table
|
|
*/
|
|
for (i = 2; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
|
|
{
|
|
AcpiTbInstallTable (AcpiGbl_RootTableList.Tables[i].Address,
|
|
NULL, i);
|
|
|
|
/* Special case for FADT - get the DSDT and FACS */
|
|
|
|
if (ACPI_COMPARE_NAME (
|
|
&AcpiGbl_RootTableList.Tables[i].Signature, ACPI_SIG_FADT))
|
|
{
|
|
AcpiTbParseFadt (i);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|