1 /******************************************************************************
3 * Module Name: tbfind - find table
5 *****************************************************************************/
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44 #include <contrib/dev/acpica/include/acpi.h>
45 #include <contrib/dev/acpica/include/accommon.h>
46 #include <contrib/dev/acpica/include/actables.h>
48 #define _COMPONENT ACPI_TABLES
49 ACPI_MODULE_NAME ("tbfind")
52 /*******************************************************************************
54 * FUNCTION: AcpiTbFindTable
56 * PARAMETERS: Signature - String with ACPI table signature
57 * OemId - String with the table OEM ID
58 * OemTableId - String with the OEM Table ID
59 * TableIndex - Where the table index is returned
61 * RETURN: Status and table index
63 * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
64 * Signature, OEM ID and OEM Table ID. Returns an index that can
65 * be used to get the table header or entire table.
67 ******************************************************************************/
78 ACPI_TABLE_HEADER Header;
81 ACPI_FUNCTION_TRACE (TbFindTable);
84 /* Normalize the input strings */
86 ACPI_MEMSET (&Header, 0, sizeof (ACPI_TABLE_HEADER));
87 ACPI_MOVE_NAME (Header.Signature, Signature);
88 ACPI_STRNCPY (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
89 ACPI_STRNCPY (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);
91 /* Search for the table */
93 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
95 if (ACPI_MEMCMP (&(AcpiGbl_RootTableList.Tables[i].Signature),
96 Header.Signature, ACPI_NAME_SIZE))
98 /* Not the requested table */
103 /* Table with matching signature has been found */
105 if (!AcpiGbl_RootTableList.Tables[i].Pointer)
107 /* Table is not currently mapped, map it */
109 Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[i]);
110 if (ACPI_FAILURE (Status))
112 return_ACPI_STATUS (Status);
115 if (!AcpiGbl_RootTableList.Tables[i].Pointer)
121 /* Check for table match on all IDs */
123 if (!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
124 Header.Signature, ACPI_NAME_SIZE) &&
126 !ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
127 Header.OemId, ACPI_OEM_ID_SIZE)) &&
129 !ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId,
130 Header.OemTableId, ACPI_OEM_TABLE_ID_SIZE)))
134 ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
136 return_ACPI_STATUS (AE_OK);
140 return_ACPI_STATUS (AE_NOT_FOUND);