595 lines
20 KiB
C
595 lines
20 KiB
C
/******************************************************************************
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*
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* Module Name: tbutils - table utilities
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* $Revision: 1.88 $
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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 - 2007, 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 <contrib/dev/acpica/acpi.h>
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#include <contrib/dev/acpica/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 ACPI_PHYSICAL_ADDRESS
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AcpiTbGetRootTableEntry (
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UINT8 *TableEntry,
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ACPI_NATIVE_UINT TableEntrySize);
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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.Count >= 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: 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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if (ACPI_COMPARE_NAME (Header->Signature, ACPI_SIG_FACS))
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{
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/* FACS only has signature and length fields of common table header */
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ACPI_INFO ((AE_INFO, "%4.4s @ 0x%p/0x%04X",
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Header->Signature, ACPI_CAST_PTR (void, Address), 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_INFO ((AE_INFO, "RSDP @ 0x%p/0x%04X (v%3.3d %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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ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->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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ACPI_INFO ((AE_INFO,
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"%4.4s @ 0x%p/0x%04X (v%3.3d %6.6s %8.8s 0x%08X %4.4s 0x%08X)",
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Header->Signature, ACPI_CAST_PTR (void, Address),
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Header->Length, Header->Revision, Header->OemId,
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Header->OemTableId, Header->OemRevision, Header->AslCompilerId,
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Header->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] - %2.2X, should be %2.2X",
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Table->Signature, Table->Checksum, (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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ACPI_NATIVE_UINT 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: AcpiTbInstallTable
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*
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* PARAMETERS: Address - Physical address of DSDT or FACS
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* Flags - Flags
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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.
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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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UINT8 Flags,
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char *Signature,
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ACPI_NATIVE_UINT TableIndex)
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{
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ACPI_TABLE_HEADER *Table;
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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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Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER));
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if (!Table)
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{
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return;
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}
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/* If a particular signature is expected, signature must match */
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if (Signature &&
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!ACPI_COMPARE_NAME (Table->Signature, Signature))
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{
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ACPI_ERROR ((AE_INFO, "Invalid signature 0x%X for ACPI table [%s]",
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*ACPI_CAST_PTR (UINT32, Table->Signature), Signature));
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goto UnmapAndExit;
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}
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/* Initialize the table entry */
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AcpiGbl_RootTableList.Tables[TableIndex].Address = Address;
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AcpiGbl_RootTableList.Tables[TableIndex].Length = Table->Length;
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AcpiGbl_RootTableList.Tables[TableIndex].Flags = Flags;
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ACPI_MOVE_32_TO_32 (
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&(AcpiGbl_RootTableList.Tables[TableIndex].Signature),
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Table->Signature);
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AcpiTbPrintTableHeader (Address, Table);
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if (TableIndex == ACPI_TABLE_INDEX_DSDT)
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{
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/* Global integer width is based upon revision of the DSDT */
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AcpiUtSetIntegerWidth (Table->Revision);
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}
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UnmapAndExit:
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AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER));
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbGetRootTableEntry
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*
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* PARAMETERS: TableEntry - Pointer to the RSDT/XSDT table entry
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* TableEntrySize - sizeof 32 or 64 (RSDT or XSDT)
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*
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* RETURN: Physical address extracted from the root table
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*
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* DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on
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* both 32-bit and 64-bit platforms
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*
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* NOTE: ACPI_PHYSICAL_ADDRESS is 32-bit on 32-bit platforms, 64-bit on
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* 64-bit platforms.
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*
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******************************************************************************/
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static ACPI_PHYSICAL_ADDRESS
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AcpiTbGetRootTableEntry (
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UINT8 *TableEntry,
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ACPI_NATIVE_UINT TableEntrySize)
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{
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UINT64 Address64;
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/*
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* Get the table physical address (32-bit for RSDT, 64-bit for XSDT):
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* Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT
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*/
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if (TableEntrySize == sizeof (UINT32))
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{
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/*
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* 32-bit platform, RSDT: Return 32-bit table entry
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* 64-bit platform, RSDT: Expand 32-bit to 64-bit and return
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*/
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return ((ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST_PTR (UINT32, TableEntry)));
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}
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else
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{
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/*
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* 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return
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* 64-bit platform, XSDT: Move (unaligned) 64-bit to local, return 64-bit
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*/
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ACPI_MOVE_64_TO_64 (&Address64, TableEntry);
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#if ACPI_MACHINE_WIDTH == 32
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if (Address64 > ACPI_UINT32_MAX)
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{
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/* Will truncate 64-bit address to 32 bits, issue warning */
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ACPI_WARNING ((AE_INFO,
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"64-bit Physical Address in XSDT is too large (%8.8X%8.8X), truncating",
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ACPI_FORMAT_UINT64 (Address64)));
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}
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#endif
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return ((ACPI_PHYSICAL_ADDRESS) (Address64));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbParseRootTable
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*
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* PARAMETERS: Rsdp - Pointer to the RSDP
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* Flags - Flags
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to parse the Root System Description
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* Table (RSDT or XSDT)
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*
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* NOTE: Tables are mapped (not copied) for efficiency. The FACS must
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* be mapped and cannot be copied because it contains the actual
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* memory location of the ACPI Global Lock.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbParseRootTable (
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ACPI_PHYSICAL_ADDRESS RsdpAddress,
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UINT8 Flags)
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{
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ACPI_TABLE_RSDP *Rsdp;
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ACPI_NATIVE_UINT TableEntrySize;
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ACPI_NATIVE_UINT i;
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UINT32 TableCount;
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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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UINT8 *TableEntry;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (TbParseRootTable);
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/*
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* Map the entire RSDP and extract the address of the RSDT or XSDT
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*/
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Rsdp = AcpiOsMapMemory (RsdpAddress, sizeof (ACPI_TABLE_RSDP));
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if (!Rsdp)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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AcpiTbPrintTableHeader (RsdpAddress, ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp));
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/* Differentiate between RSDT and XSDT root tables */
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if (Rsdp->Revision > 1 && Rsdp->XsdtPhysicalAddress)
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{
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/*
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* Root table is an XSDT (64-bit physical addresses). We must use the
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* XSDT if the revision is > 1 and the XSDT pointer is present, as per
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* the ACPI specification.
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*/
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Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->XsdtPhysicalAddress;
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TableEntrySize = sizeof (UINT64);
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}
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else
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{
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/* Root table is an RSDT (32-bit physical addresses) */
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Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress;
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TableEntrySize = sizeof (UINT32);
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}
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/*
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* It is not possible to map more than one entry in some environments,
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* so unmap the RSDP here before mapping other tables
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*/
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AcpiOsUnmapMemory (Rsdp, sizeof (ACPI_TABLE_RSDP));
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/* Map the RSDT/XSDT table header to get the full table length */
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Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER));
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if (!Table)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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AcpiTbPrintTableHeader (Address, Table);
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/* Get the length of the full table, verify length and map entire table */
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Length = Table->Length;
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AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER));
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if (Length < sizeof (ACPI_TABLE_HEADER))
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{
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ACPI_ERROR ((AE_INFO, "Invalid length 0x%X in RSDT/XSDT", Length));
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return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
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}
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Table = AcpiOsMapMemory (Address, Length);
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if (!Table)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Validate the root table checksum */
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Status = AcpiTbVerifyChecksum (Table, Length);
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if (ACPI_FAILURE (Status))
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{
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AcpiOsUnmapMemory (Table, Length);
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|
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.Count = 2;
|
|
|
|
/*
|
|
* Initialize the root table array from the RSDT/XSDT
|
|
*/
|
|
for (i = 0; i < TableCount; i++)
|
|
{
|
|
if (AcpiGbl_RootTableList.Count >= AcpiGbl_RootTableList.Size)
|
|
{
|
|
/* 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) (AcpiGbl_RootTableList.Size - AcpiGbl_RootTableList.Count)));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
|
|
|
|
AcpiGbl_RootTableList.Tables[AcpiGbl_RootTableList.Count].Address =
|
|
AcpiTbGetRootTableEntry (TableEntry, TableEntrySize);
|
|
|
|
TableEntry += TableEntrySize;
|
|
AcpiGbl_RootTableList.Count++;
|
|
}
|
|
|
|
/*
|
|
* 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.Count; i++)
|
|
{
|
|
AcpiTbInstallTable (AcpiGbl_RootTableList.Tables[i].Address,
|
|
Flags, 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, Flags);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|