tbutils.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "actables.h"

Include dependency graph for tbutils.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_TABLES

Functions
static ACPI_PHYSICAL_ADDRESS	AcpiTbGetRootTableEntry (UINT8 *TableEntry, UINT32 TableEntrySize)
ACPI_STATUS	AcpiTbInitializeFacs (void)
void	AcpiTbCheckDsdtHeader (void)
ACPI_TABLE_HEADER *	AcpiTbCopyDsdt (UINT32 TableIndex)
ACPI_STATUS ACPI_INIT_FUNCTION	AcpiTbParseRootTable (ACPI_PHYSICAL_ADDRESS RsdpAddress)
ACPI_STATUS	AcpiTbGetTable (ACPI_TABLE_DESC *TableDesc, ACPI_TABLE_HEADER **OutTable)
void	AcpiTbPutTable (ACPI_TABLE_DESC *TableDesc)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_TABLES

Definition at line 48 of file tbutils.c.

Function Documentation

AcpiTbCheckDsdtHeader()

void AcpiTbCheckDsdtHeader

(

void

)

Definition at line 124 of file tbutils.c.

{
 
    /* Compare original length and checksum to current values */
 
    if (AcpiGbl_OriginalDsdtHeader.Length != AcpiGbl_DSDT->Length ||
        AcpiGbl_OriginalDsdtHeader.Checksum != AcpiGbl_DSDT->Checksum)
    {
        ACPI_BIOS_ERROR ((AE_INFO,
            "The DSDT has been corrupted or replaced - "
            "old, new headers below"));
 
        AcpiTbPrintTableHeader (0, &AcpiGbl_OriginalDsdtHeader);
        AcpiTbPrintTableHeader (0, AcpiGbl_DSDT);
 
        /* Disable further error messages */
 
        AcpiGbl_OriginalDsdtHeader.Length = AcpiGbl_DSDT->Length;
        AcpiGbl_OriginalDsdtHeader.Checksum = AcpiGbl_DSDT->Checksum;
    }
}

Referenced by AcpiPsExecuteMethod().

AcpiTbCopyDsdt()

ACPI_TABLE_HEADER * AcpiTbCopyDsdt

(

UINT32

TableIndex

)

Definition at line 163 of file tbutils.c.

{
    ACPI_TABLE_HEADER       *NewTable;
    ACPI_TABLE_DESC         *TableDesc;
 
 
    TableDesc = &AcpiGbl_RootTableList.Tables[TableIndex];
 
    NewTable = ACPI_ALLOCATE (TableDesc->Length);
    if (!NewTable)
    {
        ACPI_ERROR ((AE_INFO, "Could not copy DSDT of length 0x%X",
            TableDesc->Length));
        return (NULL);
    }
 
    memcpy (NewTable, TableDesc->Pointer, TableDesc->Length);
    AcpiTbUninstallTable (TableDesc);
 
    AcpiTbInitTableDescriptor (
        &AcpiGbl_RootTableList.Tables[AcpiGbl_DsdtIndex],
        ACPI_PTR_TO_PHYSADDR (NewTable),
        ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL, NewTable);
 
    ACPI_INFO ((
        "Forced DSDT copy: length 0x%05X copied locally, original unmapped",
        NewTable->Length));
 
    return (NewTable);
}

Referenced by AcpiTbLoadNamespace().

AcpiTbGetRootTableEntry()

static ACPI_PHYSICAL_ADDRESS AcpiTbGetRootTableEntry ( UINT8 *  TableEntry, UINT32  TableEntrySize  )

static

Definition at line 214 of file tbutils.c.

{
    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 == ACPI_RSDT_ENTRY_SIZE)
    {
        /*
         * 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_BIOS_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));
    }
}

Referenced by AcpiTbParseRootTable().

AcpiTbGetTable()

ACPI_STATUS AcpiTbGetTable	(	ACPI_TABLE_DESC *	TableDesc,
		ACPI_TABLE_HEADER **	OutTable
	)

Definition at line 434 of file tbutils.c.

{
    ACPI_STATUS            Status;
 
 
    ACPI_FUNCTION_TRACE (AcpiTbGetTable);
 
 
    if (TableDesc->ValidationCount == 0)
    {
        /* Table need to be "VALIDATED" */
 
        Status = AcpiTbValidateTable (TableDesc);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }
 
    if (TableDesc->ValidationCount < ACPI_MAX_TABLE_VALIDATIONS)
    {
        TableDesc->ValidationCount++;
 
        /*
         * Detect ValidationCount overflows to ensure that the warning
         * message will only be printed once.
         */
        if (TableDesc->ValidationCount >= ACPI_MAX_TABLE_VALIDATIONS)
        {
            ACPI_WARNING((AE_INFO,
                "Table %p, Validation count overflows\n", TableDesc));
        }
    }
 
    *OutTable = TableDesc->Pointer;
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiGetTable(), AcpiGetTableByIndex(), AcpiTbGetTable(), and AcpiTbParseFadt().

AcpiTbInitializeFacs()

ACPI_STATUS AcpiTbInitializeFacs

(

void

)

Definition at line 75 of file tbutils.c.

{
    ACPI_TABLE_FACS         *Facs;
 
 
    /* If Hardware Reduced flag is set, there is no FACS */
 
    if (AcpiGbl_ReducedHardware)
    {
        AcpiGbl_FACS = NULL;
        return (AE_OK);
    }
    else if (AcpiGbl_FADT.XFacs &&
         (!AcpiGbl_FADT.Facs || !AcpiGbl_Use32BitFacsAddresses))
    {
        (void) AcpiGetTableByIndex (AcpiGbl_XFacsIndex,
            ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Facs));
        AcpiGbl_FACS = Facs;
    }
    else if (AcpiGbl_FADT.Facs)
    {
        (void) AcpiGetTableByIndex (AcpiGbl_FacsIndex,
            ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Facs));
        AcpiGbl_FACS = Facs;
    }
 
    /* If there is no FACS, just continue. There was already an error msg */
 
    return (AE_OK);
}

Referenced by AcpiEnableSubsystem().

AcpiTbParseRootTable()

ACPI_STATUS ACPI_INIT_FUNCTION AcpiTbParseRootTable

(

ACPI_PHYSICAL_ADDRESS

RsdpAddress

)

Definition at line 277 of file tbutils.c.

{
    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;
    UINT32                  TableIndex;
 
 
    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));
 
    /* Use XSDT if present and not overridden. Otherwise, use RSDT */
 
    if ((Rsdp->Revision > 1) &&
        Rsdp->XsdtPhysicalAddress &&
        !AcpiGbl_DoNotUseXsdt)
    {
        /*
         * RSDP contains 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 = ACPI_XSDT_ENTRY_SIZE;
    }
    else
    {
        /* Root table is an RSDT (32-bit physical addresses) */
 
        Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress;
        TableEntrySize = ACPI_RSDT_ENTRY_SIZE;
    }
 
    /*
     * 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);
 
    /*
     * Validate length of the table, and map entire table.
     * Minimum length table must contain at least one entry.
     */
    Length = Table->Length;
    AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER));
 
    if (Length < (sizeof (ACPI_TABLE_HEADER) + TableEntrySize))
    {
        ACPI_BIOS_ERROR ((AE_INFO,
            "Invalid table 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 = AcpiUtVerifyChecksum (Table, Length);
    if (ACPI_FAILURE (Status))
    {
        AcpiOsUnmapMemory (Table, Length);
        return_ACPI_STATUS (Status);
    }
 
    /* Get the number of entries and pointer to first entry */
 
    TableCount = (UINT32) ((Table->Length - sizeof (ACPI_TABLE_HEADER)) /
        TableEntrySize);
    TableEntry = ACPI_ADD_PTR (UINT8, Table, sizeof (ACPI_TABLE_HEADER));
 
    /* Initialize the root table array from the RSDT/XSDT */
 
    for (i = 0; i < TableCount; i++)
    {
        /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
 
        Address = AcpiTbGetRootTableEntry (TableEntry, TableEntrySize);
 
        /* Skip NULL entries in RSDT/XSDT */
 
        if (!Address)
        {
            goto NextTable;
        }
 
        Status = AcpiTbInstallStandardTable (Address,
            ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, TRUE,
            &TableIndex);
 
        if (ACPI_SUCCESS (Status) &&
            ACPI_COMPARE_NAMESEG (
                &AcpiGbl_RootTableList.Tables[TableIndex].Signature,
                ACPI_SIG_FADT))
        {
            AcpiGbl_FadtIndex = TableIndex;
            AcpiTbParseFadt ();
        }
 
NextTable:
 
        TableEntry += TableEntrySize;
    }
 
    AcpiOsUnmapMemory (Table, Length);
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiInitializeTables().

AcpiTbPutTable()

void AcpiTbPutTable

(

ACPI_TABLE_DESC *

TableDesc

)

Definition at line 491 of file tbutils.c.

{
 
    ACPI_FUNCTION_TRACE (AcpiTbPutTable);
 
 
    if (TableDesc->ValidationCount < ACPI_MAX_TABLE_VALIDATIONS)
    {
        TableDesc->ValidationCount--;
 
        /*
         * Detect ValidationCount underflows to ensure that the warning
         * message will only be printed once.
         */
        if (TableDesc->ValidationCount >= ACPI_MAX_TABLE_VALIDATIONS)
        {
            ACPI_WARNING ((AE_INFO,
                "Table %p, Validation count underflows\n", TableDesc));
            return_VOID;
        }
    }
 
    if (TableDesc->ValidationCount == 0)
    {
        /* Table need to be "INVALIDATED" */
 
        AcpiTbInvalidateTable (TableDesc);
    }
 
    return_VOID;
}

Referenced by AcpiPutTable(), AcpiTbParseFadt(), and AcpiTbPutTable().