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407 lines
13 KiB
C
407 lines
13 KiB
C
/******************************************************************************
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*
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* Module Name: tbrsdt - ACPI RSDT table utilities
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* $Revision: 7 $
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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 - 2003, 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 __TBRSDT_C__
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#include "acpi.h"
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#include "actables.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME ("tbrsdt")
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbVerifyRsdp
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*
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* PARAMETERS: Address - RSDP (Pointer to RSDT)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbVerifyRsdp (
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ACPI_POINTER *Address)
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{
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ACPI_TABLE_DESC TableInfo;
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ACPI_STATUS Status;
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RSDP_DESCRIPTOR *Rsdp;
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ACPI_FUNCTION_TRACE ("TbVerifyRsdp");
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switch (Address->PointerType)
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{
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case ACPI_LOGICAL_POINTER:
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Rsdp = Address->Pointer.Logical;
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break;
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case ACPI_PHYSICAL_POINTER:
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/*
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* Obtain access to the RSDP structure
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*/
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Status = AcpiOsMapMemory (Address->Pointer.Physical, sizeof (RSDP_DESCRIPTOR),
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(void **) &Rsdp);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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break;
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default:
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* The signature and checksum must both be correct
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*/
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if (ACPI_STRNCMP ((char *) Rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0)
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{
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/* Nope, BAD Signature */
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Status = AE_BAD_SIGNATURE;
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goto Cleanup;
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}
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/* Check the standard checksum */
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if (AcpiTbChecksum (Rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0)
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{
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Status = AE_BAD_CHECKSUM;
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goto Cleanup;
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}
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/* Check extended checksum if table version >= 2 */
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if (Rsdp->Revision >= 2)
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{
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if (AcpiTbChecksum (Rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)
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{
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Status = AE_BAD_CHECKSUM;
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goto Cleanup;
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}
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}
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/* The RSDP supplied is OK */
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TableInfo.Pointer = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp);
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TableInfo.Length = sizeof (RSDP_DESCRIPTOR);
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TableInfo.Allocation = ACPI_MEM_MAPPED;
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/* Save the table pointers and allocation info */
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Status = AcpiTbInitTableDescriptor (ACPI_TABLE_RSDP, &TableInfo);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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/* Save the RSDP in a global for easy access */
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AcpiGbl_RSDP = ACPI_CAST_PTR (RSDP_DESCRIPTOR, TableInfo.Pointer);
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return_ACPI_STATUS (Status);
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/* Error exit */
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Cleanup:
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if (AcpiGbl_TableFlags & ACPI_PHYSICAL_POINTER)
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{
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AcpiOsUnmapMemory (Rsdp, sizeof (RSDP_DESCRIPTOR));
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbGetRsdtAddress
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*
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* PARAMETERS: None
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*
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* RETURN: RSDT physical address
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*
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* DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the
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* version of the RSDP
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*
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******************************************************************************/
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void
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AcpiTbGetRsdtAddress (
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ACPI_POINTER *OutAddress)
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{
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ACPI_FUNCTION_ENTRY ();
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OutAddress->PointerType = AcpiGbl_TableFlags | ACPI_LOGICAL_ADDRESSING;
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/*
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* For RSDP revision 0 or 1, we use the RSDT.
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* For RSDP revision 2 (and above), we use the XSDT
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*/
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if (AcpiGbl_RSDP->Revision < 2)
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{
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OutAddress->Pointer.Value = AcpiGbl_RSDP->RsdtPhysicalAddress;
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}
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else
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{
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OutAddress->Pointer.Value = ACPI_GET_ADDRESS (AcpiGbl_RSDP->XsdtPhysicalAddress);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbValidateRsdt
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*
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* PARAMETERS: TablePtr - Addressable pointer to the RSDT.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Validate signature for the RSDT or XSDT
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbValidateRsdt (
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ACPI_TABLE_HEADER *TablePtr)
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{
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int NoMatch;
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ACPI_FUNCTION_NAME ("TbValidateRsdt");
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/*
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* For RSDP revision 0 or 1, we use the RSDT.
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* For RSDP revision 2 and above, we use the XSDT
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*/
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if (AcpiGbl_RSDP->Revision < 2)
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{
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NoMatch = ACPI_STRNCMP ((char *) TablePtr, RSDT_SIG,
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sizeof (RSDT_SIG) -1);
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}
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else
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{
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NoMatch = ACPI_STRNCMP ((char *) TablePtr, XSDT_SIG,
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sizeof (XSDT_SIG) -1);
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}
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if (NoMatch)
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{
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/* Invalid RSDT or XSDT signature */
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ACPI_REPORT_ERROR (("Invalid signature where RSDP indicates RSDT/XSDT should be located\n"));
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ACPI_DUMP_BUFFER (AcpiGbl_RSDP, 20);
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR,
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"RSDT/XSDT signature at %X (%p) is invalid\n",
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AcpiGbl_RSDP->RsdtPhysicalAddress,
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(void *) (ACPI_NATIVE_UINT) AcpiGbl_RSDP->RsdtPhysicalAddress));
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return (AE_BAD_SIGNATURE);
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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: AcpiTbGetTableRsdt
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbGetTableRsdt (
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void)
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{
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ACPI_TABLE_DESC TableInfo;
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ACPI_STATUS Status;
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ACPI_POINTER Address;
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ACPI_FUNCTION_TRACE ("TbGetTableRsdt");
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/* Get the RSDT/XSDT via the RSDP */
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AcpiTbGetRsdtAddress (&Address);
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Status = AcpiTbGetTable (&Address, &TableInfo);
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if (ACPI_FAILURE (Status))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not get the RSDT/XSDT, %s\n",
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AcpiFormatException (Status)));
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return_ACPI_STATUS (Status);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"RSDP located at %p, points to RSDT physical=%8.8X%8.8X \n",
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AcpiGbl_RSDP,
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ACPI_HIDWORD (Address.Pointer.Value),
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ACPI_LODWORD (Address.Pointer.Value)));
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/* Check the RSDT or XSDT signature */
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Status = AcpiTbValidateRsdt (TableInfo.Pointer);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Get the number of tables defined in the RSDT or XSDT */
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AcpiGbl_RsdtTableCount = AcpiTbGetTableCount (AcpiGbl_RSDP, TableInfo.Pointer);
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/* Convert and/or copy to an XSDT structure */
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Status = AcpiTbConvertToXsdt (&TableInfo);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Save the table pointers and allocation info */
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Status = AcpiTbInitTableDescriptor (ACPI_TABLE_XSDT, &TableInfo);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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AcpiGbl_XSDT = (XSDT_DESCRIPTOR *) TableInfo.Pointer;
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "XSDT located at %p\n", AcpiGbl_XSDT));
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return_ACPI_STATUS (Status);
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}
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