9560b6dea8
- 99% of the code is Intel's ACPICA. The license is compliant with BSD and GNU and virtually all systems that use ACPI use this code, For instance it is part of the Linux kernel. - The only minix specific files are acpi.c osminixxf.c platform/acminix.h and include/minix/acpi.h - At the moment the driver does not register interrupt hooks which I believe is mainly for handling PnP, events like "battery level is low" and power management. Should not be difficult to add it if need be. - The interface to the outside world is virtually non-existent except a trivial message based service for PCI driver to query which device is connected to what IRQ line. This will evolve as more components start using this driver. VM, Scheduler and IOMMU are the possible users right now. - because of dependency on a native 64bit (long long, part of c99) it is compiled only with a gnu-like compilers which in case of Minix includes gcc llvm-gcc and clang
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 - 2010, 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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|
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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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*
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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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|
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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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|
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if (Signature &&
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!ACPI_COMPARE_NAME (MappedTable->Signature, Signature))
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{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Invalid signature 0x%X for ACPI table, expected [%s]",
|
|
*ACPI_CAST_PTR (UINT32, MappedTable->Signature), Signature));
|
|
goto UnmapAndExit;
|
|
}
|
|
|
|
/*
|
|
* ACPI Table Override:
|
|
*
|
|
* Before we install the table, let the host OS override it with a new
|
|
* 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);
|
|
}
|