1 files changed, 143 insertions, 0 deletions
diff --git a/source/components/tables/tbfind.c b/source/components/tables/tbfind.c
new file mode 100644
index 000000000000..d7e2440b32ac
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+++ b/source/components/tables/tbfind.c
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+/******************************************************************************
+ *
+ * Module Name: tbfind   - find table
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#define __TBFIND_C__
+
+#include "acpi.h"
+#include "accommon.h"
+#include "actables.h"
+
+#define _COMPONENT          ACPI_TABLES
+        ACPI_MODULE_NAME    ("tbfind")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiTbFindTable
+ *
+ * PARAMETERS:  Signature           - String with ACPI table signature
+ *              OemId               - String with the table OEM ID
+ *              OemTableId          - String with the OEM Table ID
+ *              TableIndex          - Where the table index is returned
+ *
+ * RETURN:      Status and table index
+ *
+ * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
+ *              Signature, OEM ID and OEM Table ID. Returns an index that can
+ *              be used to get the table header or entire table.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiTbFindTable (
+    char                    *Signature,
+    char                    *OemId,
+    char                    *OemTableId,
+    UINT32                  *TableIndex)
+{
+    UINT32                  i;
+    ACPI_STATUS             Status;
+    ACPI_TABLE_HEADER       Header;
+
+
+    ACPI_FUNCTION_TRACE (TbFindTable);
+
+
+    /* Normalize the input strings */
+
+    ACPI_MEMSET (&Header, 0, sizeof (ACPI_TABLE_HEADER));
+    ACPI_STRNCPY (Header.Signature, Signature, ACPI_NAME_SIZE);
+    ACPI_STRNCPY (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
+    ACPI_STRNCPY (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);
+
+    /* Search for the table */
+
+    for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
+    {
+        if (ACPI_MEMCMP (&(AcpiGbl_RootTableList.Tables[i].Signature),
+                            Header.Signature, ACPI_NAME_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 = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
+            if (ACPI_FAILURE (Status))
+            {
+                return_ACPI_STATUS (Status);
+            }
+
+            if (!AcpiGbl_RootTableList.Tables[i].Pointer)
+            {
+                continue;
+            }
+        }
+
+        /* Check for table match on all IDs */
+
+        if (!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
+                            Header.Signature, ACPI_NAME_SIZE) &&
+            (!OemId[0] ||
+             !ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
+                             Header.OemId, ACPI_OEM_ID_SIZE)) &&
+            (!OemTableId[0] ||
+             !ACPI_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));
+            return_ACPI_STATUS (AE_OK);
+        }
+    }
+
+    return_ACPI_STATUS (AE_NOT_FOUND);
+}