/******************************************************************************
*
* Module Name: tbrsdt - ACPI RSDT table utilities
* $Revision: 7 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __TBRSDT_C__
#include "acpi.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbrsdt")
/*******************************************************************************
*
* FUNCTION: AcpiTbVerifyRsdp
*
* PARAMETERS: Address - RSDP (Pointer to RSDT)
*
* RETURN: Status
*
* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
*
******************************************************************************/
ACPI_STATUS
AcpiTbVerifyRsdp (
ACPI_POINTER *Address)
{
ACPI_TABLE_DESC TableInfo;
ACPI_STATUS Status;
RSDP_DESCRIPTOR *Rsdp;
ACPI_FUNCTION_TRACE ("TbVerifyRsdp");
switch (Address->PointerType)
{
case ACPI_LOGICAL_POINTER:
Rsdp = Address->Pointer.Logical;
break;
case ACPI_PHYSICAL_POINTER:
/*
* Obtain access to the RSDP structure
*/
Status = AcpiOsMapMemory (Address->Pointer.Physical, sizeof (RSDP_DESCRIPTOR),
(void **) &Rsdp);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
default:
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* The signature and checksum must both be correct
*/
if (ACPI_STRNCMP ((char *) Rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0)
{
/* Nope, BAD Signature */
Status = AE_BAD_SIGNATURE;
goto Cleanup;
}
/* Check the standard checksum */
if (AcpiTbChecksum (Rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0)
{
Status = AE_BAD_CHECKSUM;
goto Cleanup;
}
/* Check extended checksum if table version >= 2 */
if (Rsdp->Revision >= 2)
{
if (AcpiTbChecksum (Rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)
{
Status = AE_BAD_CHECKSUM;
goto Cleanup;
}
}
/* The RSDP supplied is OK */
TableInfo.Pointer = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp);
TableInfo.Length = sizeof (RSDP_DESCRIPTOR);
TableInfo.Allocation = ACPI_MEM_MAPPED;
/* Save the table pointers and allocation info */
Status = AcpiTbInitTableDescriptor (ACPI_TABLE_RSDP, &TableInfo);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* Save the RSDP in a global for easy access */
AcpiGbl_RSDP = ACPI_CAST_PTR (RSDP_DESCRIPTOR, TableInfo.Pointer);
return_ACPI_STATUS (Status);
/* Error exit */
Cleanup:
if (AcpiGbl_TableFlags & ACPI_PHYSICAL_POINTER)
{
AcpiOsUnmapMemory (Rsdp, sizeof (RSDP_DESCRIPTOR));
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbGetRsdtAddress
*
* PARAMETERS: None
*
* RETURN: RSDT physical address
*
* DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the
* version of the RSDP
*
******************************************************************************/
void
AcpiTbGetRsdtAddress (
ACPI_POINTER *OutAddress)
{
ACPI_FUNCTION_ENTRY ();
OutAddress->PointerType = AcpiGbl_TableFlags | ACPI_LOGICAL_ADDRESSING;
/*
* For RSDP revision 0 or 1, we use the RSDT.
* For RSDP revision 2 (and above), we use the XSDT
*/
if (AcpiGbl_RSDP->Revision < 2)
{
OutAddress->Pointer.Value = AcpiGbl_RSDP->RsdtPhysicalAddress;
}
else
{
OutAddress->Pointer.Value = ACPI_GET_ADDRESS (AcpiGbl_RSDP->XsdtPhysicalAddress);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiTbValidateRsdt
*
* PARAMETERS: TablePtr - Addressable pointer to the RSDT.
*
* RETURN: Status
*
* DESCRIPTION: Validate signature for the RSDT or XSDT
*
******************************************************************************/
ACPI_STATUS
AcpiTbValidateRsdt (
ACPI_TABLE_HEADER *TablePtr)
{
int NoMatch;
ACPI_FUNCTION_NAME ("TbValidateRsdt");
/*
* For RSDP revision 0 or 1, we use the RSDT.
* For RSDP revision 2 and above, we use the XSDT
*/
if (AcpiGbl_RSDP->Revision < 2)
{
NoMatch = ACPI_STRNCMP ((char *) TablePtr, RSDT_SIG,
sizeof (RSDT_SIG) -1);
}
else
{
NoMatch = ACPI_STRNCMP ((char *) TablePtr, XSDT_SIG,
sizeof (XSDT_SIG) -1);
}
if (NoMatch)
{
/* Invalid RSDT or XSDT signature */
ACPI_REPORT_ERROR (("Invalid signature where RSDP indicates RSDT/XSDT should be located\n"));
ACPI_DUMP_BUFFER (AcpiGbl_RSDP, 20);
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR,
"RSDT/XSDT signature at %X (%p) is invalid\n",
AcpiGbl_RSDP->RsdtPhysicalAddress,
(void *) (ACPI_NATIVE_UINT) AcpiGbl_RSDP->RsdtPhysicalAddress));
return (AE_BAD_SIGNATURE);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbGetTableRsdt
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
*
******************************************************************************/
ACPI_STATUS
AcpiTbGetTableRsdt (
void)
{
ACPI_TABLE_DESC TableInfo;
ACPI_STATUS Status;
ACPI_POINTER Address;
ACPI_FUNCTION_TRACE ("TbGetTableRsdt");
/* Get the RSDT/XSDT via the RSDP */
AcpiTbGetRsdtAddress (&Address);
Status = AcpiTbGetTable (&Address, &TableInfo);
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not get the RSDT/XSDT, %s\n",
AcpiFormatException (Status)));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"RSDP located at %p, points to RSDT physical=%8.8X%8.8X \n",
AcpiGbl_RSDP,
ACPI_HIDWORD (Address.Pointer.Value),
ACPI_LODWORD (Address.Pointer.Value)));
/* Check the RSDT or XSDT signature */
Status = AcpiTbValidateRsdt (TableInfo.Pointer);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Get the number of tables defined in the RSDT or XSDT */
AcpiGbl_RsdtTableCount = AcpiTbGetTableCount (AcpiGbl_RSDP, TableInfo.Pointer);
/* Convert and/or copy to an XSDT structure */
Status = AcpiTbConvertToXsdt (&TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Save the table pointers and allocation info */
Status = AcpiTbInitTableDescriptor (ACPI_TABLE_XSDT, &TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiGbl_XSDT = (XSDT_DESCRIPTOR *) TableInfo.Pointer;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "XSDT located at %p\n", AcpiGbl_XSDT));
return_ACPI_STATUS (Status);
}
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