tbfind.c File Reference

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

Include dependency graph for tbfind.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_TABLES

Functions
ACPI_STATUS	AcpiTbFindTable (char *Signature, char *OemId, char *OemTableId, UINT32 *TableIndex)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_TABLES

Definition at line 48 of file tbfind.c.

Function Documentation

AcpiTbFindTable()

ACPI_STATUS AcpiTbFindTable	(	char *	Signature,
		char *	OemId,
		char *	OemTableId,
		UINT32 *	TableIndex
	)

Definition at line 70 of file tbfind.c.

{
    ACPI_STATUS             Status = AE_OK;
    ACPI_TABLE_HEADER       Header;
    UINT32                  i;
 
 
    ACPI_FUNCTION_TRACE (TbFindTable);
 
 
    /* Validate the input table signature */
 
    if (!AcpiUtValidNameseg (Signature))
    {
        return_ACPI_STATUS (AE_BAD_SIGNATURE);
    }
 
    /* Don't allow the OEM strings to be too long */
 
    if ((strlen (OemId) > ACPI_OEM_ID_SIZE) ||
        (strlen (OemTableId) > ACPI_OEM_TABLE_ID_SIZE))
    {
        return_ACPI_STATUS (AE_AML_STRING_LIMIT);
    }
 
    /* Normalize the input strings */
 
    memset (&Header, 0, sizeof (ACPI_TABLE_HEADER));
    ACPI_COPY_NAMESEG (Header.Signature, Signature);
    strncpy (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
    strncpy (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);
 
    /* Search for the table */
 
    (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
    for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
    {
        if (memcmp (&(AcpiGbl_RootTableList.Tables[i].Signature),
            Header.Signature, ACPI_NAMESEG_SIZE))
        {
            /* Not the requested table */
 
            continue;
        }
 
        /* Table with matching signature has been found */
 
        if (!AcpiGbl_RootTableList.Tables[i].Pointer)
        {
            /* Table is not currently mapped, map it */
 
            Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[i]);
            if (ACPI_FAILURE (Status))
            {
                goto UnlockAndExit;
            }
 
            if (!AcpiGbl_RootTableList.Tables[i].Pointer)
            {
                continue;
            }
        }
 
        /* Check for table match on all IDs */
 
        if (!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
                Header.Signature, ACPI_NAMESEG_SIZE) &&
            (!OemId[0] ||
             !memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
                 Header.OemId, ACPI_OEM_ID_SIZE)) &&
            (!OemTableId[0] ||
             !memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId,
                 Header.OemTableId, ACPI_OEM_TABLE_ID_SIZE)))
        {
            *TableIndex = i;
 
            ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
                Header.Signature));
            goto UnlockAndExit;
        }
    }
    Status = AE_NOT_FOUND;
 
UnlockAndExit:
    (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiDsEvalTableRegionOperands(), and AcpiExLoadTableOp().