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2911e62dda
acpica/source/components/tables/tbxfroot.c
aystarik 2911e62dda Added revision number to header 
date	2000.08.16.21.38.00;	author rmoore1;	state Exp;
2005-06-29 18:54:57 +00:00

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C
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/******************************************************************************
*
* Module Name: tbtable - ACPI tables: FACP, FACS, and RSDP utilities
* $Revision: 1.21 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 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 __TBTABLE_C__
#include "acpi.h"
#include "achware.h"
#include "actables.h"
#define _COMPONENT TABLE_MANAGER
MODULE_NAME ("tbtable");
/*******************************************************************************
*
* FUNCTION: AcpiTbGetTableRsdt
*
* PARAMETERS: NumberOfTables - Where the table count is placed
*
* RETURN: Status
*
* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
*
******************************************************************************/
ACPI_STATUS
AcpiTbGetTableRsdt (
UINT32 *NumberOfTables)
{
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_DESC TableInfo;
FUNCTION_TRACE ("TbGetTableRsdt");
/* Get the RSDP */
Status = AcpiTbFindRsdp (&TableInfo);
if (ACPI_FAILURE (Status))
{
REPORT_WARNING ("RSDP structure not found");
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Save the table pointers and allocation info */
Status = AcpiTbInitTableDescriptor (ACPI_TABLE_RSDP, &TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiGbl_RSDP = (ROOT_SYSTEM_DESCRIPTOR_POINTER *) TableInfo.Pointer;
/*
* RSDP structure was found; Now get the RSDT
*/
DEBUG_PRINT (ACPI_INFO,
("RSDP located at %p, RSDT physical=%p \n",
AcpiGbl_RSDP, AcpiGbl_RSDP->RsdtPhysicalAddress));
Status = AcpiTbGetTable ((void *) AcpiGbl_RSDP->RsdtPhysicalAddress, NULL,
&TableInfo);
if (ACPI_FAILURE (Status))
{
DEBUG_PRINT (ACPI_ERROR,
("GetRsdt: Could not get the RSDT, %s\n",
AcpiCmFormatException (Status)));
if (Status == AE_BAD_SIGNATURE)
{
/* Invalid RSDT signature */
REPORT_ERROR ("Invalid signature where RSDP indicates RSDT should be located");
DUMP_BUFFER (AcpiGbl_RSDP, 20);
DEBUG_PRINT_RAW (ACPI_ERROR,
("RSDP points to RSDT at %lXh, but RSDT signature is invalid\n",
(void *) AcpiGbl_RSDP->RsdtPhysicalAddress));
}
REPORT_ERROR ("Unable to locate RSDT");
return_ACPI_STATUS (Status);
}
/* Always delete the RSDP mapping */
AcpiTbDeleteAcpiTable (ACPI_TABLE_RSDP);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Save the table pointers and allocation info */
Status = AcpiTbInitTableDescriptor (ACPI_TABLE_RSDT, &TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiGbl_RSDT = (ROOT_SYSTEM_DESCRIPTION_TABLE *) TableInfo.Pointer;
/* Valid RSDT signature, verify the checksum */
DEBUG_PRINT (ACPI_INFO, ("RSDT located at %p\n", AcpiGbl_RSDT));
Status = AcpiTbVerifyTableChecksum ((ACPI_TABLE_HEADER *) AcpiGbl_RSDT);
/*
* Determine the number of tables pointed to by the RSDT.
* This is defined by the ACPI Specification to be the number of
* pointers contained within the RSDT. The size of the pointers
* is architecture-dependent.
*/
*NumberOfTables = ((AcpiGbl_RSDT->header.Length -
sizeof (ACPI_TABLE_HEADER)) / sizeof (void *));
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbScanMemoryForRsdp
*
* PARAMETERS: StartAddress - Starting pointer for search
* Length - Maximum length to search
*
* RETURN: Pointer to the RSDP if found, otherwise NULL.
*
* DESCRIPTION: Search a block of memory for the RSDP signature
*
******************************************************************************/
UINT8 *
AcpiTbScanMemoryForRsdp (
UINT8 *StartAddress,
UINT32 Length)
{
UINT32 Offset;
UINT8 *MemRover;
/* Search from given start addr for the requested length */
for (Offset = 0, MemRover = StartAddress;
Offset < Length;
Offset += RSDP_SCAN_STEP, MemRover += RSDP_SCAN_STEP)
{
/* The signature and checksum must both be correct */
if (STRNCMP (MemRover, RSDP_SIG, sizeof (RSDP_SIG)-1) == 0 &&
AcpiTbChecksum (MemRover,
sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER)) == 0)
{
/* If so, we have found the RSDP */
return (MemRover);
}
}
/* Searched entire block, no RSDP was found */
return (NULL);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbFindRsdp
*
* PARAMETERS: *BufferPtr - If == NULL, read data from buffer
* rather than searching memory
* *TableInfo - Where the table info is returned
*
* RETURN: Status
*
* DESCRIPTION: Search lower 1Mbyte of memory for the root system descriptor
* pointer structure. If it is found, set *RSDP to point to it.
*
* NOTE: The RSDP must be either in the first 1K of the Extended
* BIOS Data Area or between E0000 and FFFFF (ACPI 1.0 section
* 5.2.2; assertion #421).
*
******************************************************************************/
ACPI_STATUS
AcpiTbFindRsdp (
ACPI_TABLE_DESC *TableInfo)
{
UINT8 *TablePtr;
UINT8 *MemRover;
ACPI_STATUS Status = AE_OK;
FUNCTION_TRACE ("TbFindRsdp");
if (AcpiGbl_AcpiInitData.RSDP_PhysicalAddress)
{
/*
* RSDP address was supplied as part of the initialization data
*/
Status = AcpiOsMapMemory(AcpiGbl_AcpiInitData.RSDP_PhysicalAddress,
sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER),
(void **)&TablePtr);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (!TablePtr)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* The signature and checksum must both be correct
*/
if (STRNCMP (TablePtr, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0)
{
/* Nope, BAD Signature */
AcpiOsUnmapMemory (TablePtr, sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER));
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
/* The signature and checksum must both be correct */
if (AcpiTbChecksum (TablePtr,
sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER)) != 0)
{
/* Nope, BAD Checksum */
AcpiOsUnmapMemory (TablePtr, sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER));
return_ACPI_STATUS (AE_BAD_CHECKSUM);
}
/* RSDP supplied is OK */
/* If so, we have found the RSDP */
TableInfo->Pointer = (ACPI_TABLE_HEADER *) TablePtr;
TableInfo->Length = sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER);
TableInfo->Allocation = ACPI_MEM_MAPPED;
TableInfo->BasePointer = TablePtr;
return_ACPI_STATUS (AE_OK);
}
/*
* Search memory for RSDP. First map low physical memory.
*/
Status = AcpiOsMapMemory (LO_RSDP_WINDOW_BASE, LO_RSDP_WINDOW_SIZE,
(void **)&TablePtr);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* 1) Search EBDA (low memory) paragraphs
*/
if (NULL != (MemRover = AcpiTbScanMemoryForRsdp (TablePtr,
LO_RSDP_WINDOW_SIZE)))
{
/* Found it, return pointer and don't delete the mapping */
TableInfo->Pointer = (ACPI_TABLE_HEADER *) MemRover;
TableInfo->Length = LO_RSDP_WINDOW_SIZE;
TableInfo->Allocation = ACPI_MEM_MAPPED;
TableInfo->BasePointer = TablePtr;
return_ACPI_STATUS (AE_OK);
}
/* This mapping is no longer needed */
AcpiOsUnmapMemory (TablePtr, LO_RSDP_WINDOW_SIZE);
/*
* 2) Search upper memory: 16-byte boundaries in E0000h-F0000h
*/
Status = AcpiOsMapMemory (HI_RSDP_WINDOW_BASE, HI_RSDP_WINDOW_SIZE,
(void **)&TablePtr);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (NULL != (MemRover = AcpiTbScanMemoryForRsdp (TablePtr,
HI_RSDP_WINDOW_SIZE)))
{
/* Found it, return pointer and don't delete the mapping */
TableInfo->Pointer = (ACPI_TABLE_HEADER *) MemRover;
TableInfo->Length = HI_RSDP_WINDOW_SIZE;
TableInfo->Allocation = ACPI_MEM_MAPPED;
TableInfo->BasePointer = TablePtr;
return_ACPI_STATUS (AE_OK);
}
/* This mapping is no longer needed */
AcpiOsUnmapMemory (TablePtr, HI_RSDP_WINDOW_SIZE);
/* RSDP signature was not found */
return_ACPI_STATUS (AE_NOT_FOUND);
}
/******************************************************************************
*
* FUNCTION: AcpiTbGetTableFacs
*
* PARAMETERS: *BufferPtr - If BufferPtr is valid, read data from
* buffer rather than searching memory
* *TableInfo - Where the table info is returned
*
* RETURN: Status
*
* DESCRIPTION: Returns a pointer to the FACS as defined in FACP. This
* function assumes the global variable FACP has been
* correctly initialized. The value of FACP->FirmwareCtrl
* into a far pointer which is returned.
*
*****************************************************************************/
ACPI_STATUS
AcpiTbGetTableFacs (
ACPI_TABLE_HEADER *BufferPtr,
ACPI_TABLE_DESC *TableInfo)
{
void *TablePtr = NULL;
UINT32 Size;
UINT8 Allocation;
ACPI_STATUS Status = AE_OK;
FUNCTION_TRACE ("TbGetTableFacs");
/* Must have a valid FACP pointer */
if (!AcpiGbl_FACP)
{
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
Size = sizeof (FIRMWARE_ACPI_CONTROL_STRUCTURE);
if (BufferPtr)
{
/*
* Getting table from a file -- allocate a buffer and
* read the table.
*/
TablePtr = AcpiCmAllocate (Size);
if(!TablePtr)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
MEMCPY (TablePtr, BufferPtr, Size);
/* Save allocation type */
Allocation = ACPI_MEM_ALLOCATED;
}
else
{
/* Just map the physical memory to our address space */
Status = AcpiTbMapAcpiTable ((void *) AcpiGbl_FACP->FirmwareCtrl,
&Size, &TablePtr);
if (ACPI_FAILURE(Status))
{
return_ACPI_STATUS (Status);
}
/* Save allocation type */
Allocation = ACPI_MEM_MAPPED;
}
/* Return values */
TableInfo->Pointer = TablePtr;
TableInfo->Length = Size;
TableInfo->Allocation = Allocation;
TableInfo->BasePointer = TablePtr;
return_ACPI_STATUS (Status);
}
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