tbxface.c revision 91116
167754Smsmith/****************************************************************************** 267754Smsmith * 367754Smsmith * Module Name: tbxface - Public interfaces to the ACPI subsystem 467754Smsmith * ACPI table oriented interfaces 591116Smsmith * $Revision: 51 $ 667754Smsmith * 767754Smsmith *****************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 1391116Smsmith * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 1470243Smsmith * All rights reserved. 1567754Smsmith * 1667754Smsmith * 2. License 1767754Smsmith * 1867754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1967754Smsmith * rights. You may have additional license terms from the party that provided 2067754Smsmith * you this software, covering your right to use that party's intellectual 2167754Smsmith * property rights. 2267754Smsmith * 2367754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2467754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2567754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2667754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2767754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2867754Smsmith * Code in any form, with the right to sublicense such rights; and 2967754Smsmith * 3067754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3167754Smsmith * license (with the right to sublicense), under only those claims of Intel 3267754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3367754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3467754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3567754Smsmith * license, and in no event shall the patent license extend to any additions 3667754Smsmith * to or modifications of the Original Intel Code. No other license or right 3767754Smsmith * is granted directly or by implication, estoppel or otherwise; 3867754Smsmith * 3967754Smsmith * The above copyright and patent license is granted only if the following 4067754Smsmith * conditions are met: 4167754Smsmith * 4267754Smsmith * 3. Conditions 4367754Smsmith * 4467754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4567754Smsmith * Redistribution of source code of any substantial portion of the Covered 4667754Smsmith * Code or modification with rights to further distribute source must include 4767754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4867754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4967754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 5067754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5167754Smsmith * Code and the date of any change. Licensee must include in that file the 5267754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5367754Smsmith * must include a prominent statement that the modification is derived, 5467754Smsmith * directly or indirectly, from Original Intel Code. 5567754Smsmith * 5667754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5767754Smsmith * Redistribution of source code of any substantial portion of the Covered 5867754Smsmith * Code or modification without rights to further distribute source must 5967754Smsmith * include the following Disclaimer and Export Compliance provision in the 6067754Smsmith * documentation and/or other materials provided with distribution. In 6167754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6267754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6367754Smsmith * license from Licensee to its licensee is limited to the intellectual 6467754Smsmith * property embodied in the software Licensee provides to its licensee, and 6567754Smsmith * not to intellectual property embodied in modifications its licensee may 6667754Smsmith * make. 6767754Smsmith * 6867754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6967754Smsmith * substantial portion of the Covered Code or modification must reproduce the 7067754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7167754Smsmith * provision in the documentation and/or other materials provided with the 7267754Smsmith * distribution. 7367754Smsmith * 7467754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7567754Smsmith * Intel Code. 7667754Smsmith * 7767754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7867754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7967754Smsmith * other dealings in products derived from or relating to the Covered Code 8067754Smsmith * without prior written authorization from Intel. 8167754Smsmith * 8267754Smsmith * 4. Disclaimer and Export Compliance 8367754Smsmith * 8467754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8567754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8667754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8767754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8867754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8967754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 9067754Smsmith * PARTICULAR PURPOSE. 9167754Smsmith * 9267754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9367754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9467754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9567754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9667754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9767754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9867754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9967754Smsmith * LIMITED REMEDY. 10067754Smsmith * 10167754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10267754Smsmith * software or system incorporating such software without first obtaining any 10367754Smsmith * required license or other approval from the U. S. Department of Commerce or 10467754Smsmith * any other agency or department of the United States Government. In the 10567754Smsmith * event Licensee exports any such software from the United States or 10667754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10767754Smsmith * ensure that the distribution and export/re-export of the software is in 10867754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10967754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 11067754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11167754Smsmith * software, or service, directly or indirectly, to any country for which the 11267754Smsmith * United States government or any agency thereof requires an export license, 11367754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11467754Smsmith * such license, approval or letter. 11567754Smsmith * 11667754Smsmith *****************************************************************************/ 11767754Smsmith 11867754Smsmith#define __TBXFACE_C__ 11967754Smsmith 12067754Smsmith#include "acpi.h" 12167754Smsmith#include "acnamesp.h" 12267754Smsmith#include "acinterp.h" 12367754Smsmith#include "actables.h" 12467754Smsmith 12567754Smsmith 12677424Smsmith#define _COMPONENT ACPI_TABLES 12791116Smsmith ACPI_MODULE_NAME ("tbxface") 12867754Smsmith 12967754Smsmith 13067754Smsmith/******************************************************************************* 13167754Smsmith * 13267754Smsmith * FUNCTION: AcpiLoadTables 13367754Smsmith * 13467754Smsmith * PARAMETERS: None 13567754Smsmith * 13667754Smsmith * RETURN: Status 13767754Smsmith * 13867754Smsmith * DESCRIPTION: This function is called to load the ACPI tables from the 13967754Smsmith * provided RSDT 14067754Smsmith * 14167754Smsmith ******************************************************************************/ 14267754Smsmith 14367754SmsmithACPI_STATUS 14480062SmsmithAcpiLoadTables (void) 14567754Smsmith{ 14680062Smsmith ACPI_PHYSICAL_ADDRESS RsdpPhysicalAddress; 14777424Smsmith ACPI_STATUS Status; 14867754Smsmith UINT32 NumberOfTables = 0; 14967754Smsmith 15067754Smsmith 15191116Smsmith ACPI_FUNCTION_TRACE ("AcpiLoadTables"); 15267754Smsmith 15367754Smsmith 15480062Smsmith /* Get the RSDP */ 15580062Smsmith 15683174Smsmith Status = AcpiOsGetRootPointer (ACPI_LOGICAL_ADDRESSING, 15780062Smsmith &RsdpPhysicalAddress); 15880062Smsmith if (ACPI_FAILURE (Status)) 15980062Smsmith { 16091116Smsmith ACPI_REPORT_ERROR (("AcpiLoadTables: Could not get RSDP, %s\n", 16180062Smsmith AcpiFormatException (Status))); 16280062Smsmith goto ErrorExit; 16380062Smsmith } 16480062Smsmith 16567754Smsmith /* Map and validate the RSDP */ 16667754Smsmith 16767754Smsmith Status = AcpiTbVerifyRsdp (RsdpPhysicalAddress); 16867754Smsmith if (ACPI_FAILURE (Status)) 16967754Smsmith { 17091116Smsmith ACPI_REPORT_ERROR (("AcpiLoadTables: RSDP Failed validation: %s\n", 17180062Smsmith AcpiFormatException (Status))); 17267754Smsmith goto ErrorExit; 17367754Smsmith } 17467754Smsmith 17567754Smsmith /* Get the RSDT via the RSDP */ 17667754Smsmith 17767754Smsmith Status = AcpiTbGetTableRsdt (&NumberOfTables); 17867754Smsmith if (ACPI_FAILURE (Status)) 17967754Smsmith { 18091116Smsmith ACPI_REPORT_ERROR (("AcpiLoadTables: Could not load RSDT: %s\n", 18180062Smsmith AcpiFormatException (Status))); 18267754Smsmith goto ErrorExit; 18367754Smsmith } 18467754Smsmith 18567754Smsmith /* Now get the rest of the tables */ 18667754Smsmith 18767754Smsmith Status = AcpiTbGetAllTables (NumberOfTables, NULL); 18867754Smsmith if (ACPI_FAILURE (Status)) 18967754Smsmith { 19091116Smsmith ACPI_REPORT_ERROR (("AcpiLoadTables: Error getting required tables (DSDT/FADT/FACS): %s\n", 19180062Smsmith AcpiFormatException (Status))); 19267754Smsmith goto ErrorExit; 19367754Smsmith } 19467754Smsmith 19582367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_OK, "ACPI Tables successfully loaded\n")); 19667754Smsmith 19767754Smsmith 19867754Smsmith /* Load the namespace from the tables */ 19967754Smsmith 20067754Smsmith Status = AcpiNsLoadNamespace (); 20167754Smsmith if (ACPI_FAILURE (Status)) 20267754Smsmith { 20391116Smsmith ACPI_REPORT_ERROR (("AcpiLoadTables: Could not load namespace: %s\n", 20480062Smsmith AcpiFormatException (Status))); 20567754Smsmith goto ErrorExit; 20667754Smsmith } 20767754Smsmith 20867754Smsmith return_ACPI_STATUS (AE_OK); 20967754Smsmith 21067754Smsmith 21167754SmsmithErrorExit: 21291116Smsmith ACPI_REPORT_ERROR (("AcpiLoadTables: Could not load tables: %s\n", 21380062Smsmith AcpiFormatException (Status))); 21467754Smsmith 21567754Smsmith return_ACPI_STATUS (Status); 21667754Smsmith} 21767754Smsmith 21867754Smsmith 21967754Smsmith/******************************************************************************* 22067754Smsmith * 22167754Smsmith * FUNCTION: AcpiLoadTable 22267754Smsmith * 22367754Smsmith * PARAMETERS: TablePtr - pointer to a buffer containing the entire 22467754Smsmith * table to be loaded 22567754Smsmith * 22667754Smsmith * RETURN: Status 22767754Smsmith * 22867754Smsmith * DESCRIPTION: This function is called to load a table from the caller's 22967754Smsmith * buffer. The buffer must contain an entire ACPI Table including 23067754Smsmith * a valid header. The header fields will be verified, and if it 23167754Smsmith * is determined that the table is invalid, the call will fail. 23267754Smsmith * 23367754Smsmith ******************************************************************************/ 23467754Smsmith 23567754SmsmithACPI_STATUS 23667754SmsmithAcpiLoadTable ( 23767754Smsmith ACPI_TABLE_HEADER *TablePtr) 23867754Smsmith{ 23967754Smsmith ACPI_STATUS Status; 24067754Smsmith ACPI_TABLE_DESC TableInfo; 24167754Smsmith 24267754Smsmith 24391116Smsmith ACPI_FUNCTION_TRACE ("AcpiLoadTable"); 24467754Smsmith 24577424Smsmith 24667754Smsmith if (!TablePtr) 24767754Smsmith { 24867754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 24967754Smsmith } 25067754Smsmith 25167754Smsmith /* Copy the table to a local buffer */ 25267754Smsmith 25369450Smsmith Status = AcpiTbGetTable (0, TablePtr, &TableInfo); 25467754Smsmith if (ACPI_FAILURE (Status)) 25567754Smsmith { 25667754Smsmith return_ACPI_STATUS (Status); 25767754Smsmith } 25867754Smsmith 25967754Smsmith /* Install the new table into the local data structures */ 26067754Smsmith 26167754Smsmith Status = AcpiTbInstallTable (NULL, &TableInfo); 26267754Smsmith if (ACPI_FAILURE (Status)) 26367754Smsmith { 26467754Smsmith /* Free table allocated by AcpiTbGetTable */ 26567754Smsmith 26667754Smsmith AcpiTbDeleteSingleTable (&TableInfo); 26767754Smsmith return_ACPI_STATUS (Status); 26867754Smsmith } 26967754Smsmith 27091116Smsmith /* Convert the table to common format if necessary */ 27167754Smsmith 27291116Smsmith switch (TableInfo.Type) 27391116Smsmith { 27491116Smsmith case ACPI_TABLE_FADT: 27591116Smsmith 27691116Smsmith Status = AcpiTbConvertTableFadt (); 27791116Smsmith break; 27891116Smsmith 27991116Smsmith case ACPI_TABLE_FACS: 28091116Smsmith 28191116Smsmith Status = AcpiTbBuildCommonFacs (&TableInfo); 28291116Smsmith break; 28391116Smsmith 28491116Smsmith default: 28591116Smsmith /* Load table into namespace if it contains executable AML */ 28691116Smsmith 28791116Smsmith Status = AcpiNsLoadTable (TableInfo.InstalledDesc, AcpiGbl_RootNode); 28891116Smsmith break; 28991116Smsmith } 29091116Smsmith 29167754Smsmith if (ACPI_FAILURE (Status)) 29267754Smsmith { 29367754Smsmith /* Uninstall table and free the buffer */ 29467754Smsmith 29567754Smsmith AcpiTbUninstallTable (TableInfo.InstalledDesc); 29667754Smsmith } 29767754Smsmith 29867754Smsmith return_ACPI_STATUS (Status); 29967754Smsmith} 30067754Smsmith 30167754Smsmith 30267754Smsmith/******************************************************************************* 30367754Smsmith * 30467754Smsmith * FUNCTION: AcpiUnloadTable 30567754Smsmith * 30667754Smsmith * PARAMETERS: TableType - Type of table to be unloaded 30767754Smsmith * 30867754Smsmith * RETURN: Status 30967754Smsmith * 31067754Smsmith * DESCRIPTION: This routine is used to force the unload of a table 31167754Smsmith * 31267754Smsmith ******************************************************************************/ 31367754Smsmith 31467754SmsmithACPI_STATUS 31567754SmsmithAcpiUnloadTable ( 31667754Smsmith ACPI_TABLE_TYPE TableType) 31767754Smsmith{ 31867754Smsmith ACPI_TABLE_DESC *ListHead; 31967754Smsmith 32067754Smsmith 32191116Smsmith ACPI_FUNCTION_TRACE ("AcpiUnloadTable"); 32267754Smsmith 32367754Smsmith 32467754Smsmith /* Parameter validation */ 32567754Smsmith 32667754Smsmith if (TableType > ACPI_TABLE_MAX) 32767754Smsmith { 32867754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 32967754Smsmith } 33067754Smsmith 33167754Smsmith 33267754Smsmith /* Find all tables of the requested type */ 33367754Smsmith 33467754Smsmith ListHead = &AcpiGbl_AcpiTables[TableType]; 33567754Smsmith do 33667754Smsmith { 33767754Smsmith /* 33867754Smsmith * Delete all namespace entries owned by this table. Note that these 33967754Smsmith * entries can appear anywhere in the namespace by virtue of the AML 34067754Smsmith * "Scope" operator. Thus, we need to track ownership by an ID, not 34167754Smsmith * simply a position within the hierarchy 34267754Smsmith */ 34367754Smsmith AcpiNsDeleteNamespaceByOwner (ListHead->TableId); 34467754Smsmith 34567754Smsmith /* Delete (or unmap) the actual table */ 34667754Smsmith 34767754Smsmith AcpiTbDeleteAcpiTable (TableType); 34867754Smsmith 34967754Smsmith } while (ListHead != &AcpiGbl_AcpiTables[TableType]); 35067754Smsmith 35167754Smsmith return_ACPI_STATUS (AE_OK); 35267754Smsmith} 35367754Smsmith 35467754Smsmith 35567754Smsmith/******************************************************************************* 35667754Smsmith * 35767754Smsmith * FUNCTION: AcpiGetTableHeader 35867754Smsmith * 35967754Smsmith * PARAMETERS: TableType - one of the defined table types 36067754Smsmith * Instance - the non zero instance of the table, allows 36167754Smsmith * support for multiple tables of the same type 36267754Smsmith * see AcpiGbl_AcpiTableFlag 36367754Smsmith * OutTableHeader - pointer to the ACPI_TABLE_HEADER if successful 36467754Smsmith * 36567754Smsmith * DESCRIPTION: This function is called to get an ACPI table header. The caller 36667754Smsmith * supplies an pointer to a data area sufficient to contain an ACPI 36767754Smsmith * ACPI_TABLE_HEADER structure. 36867754Smsmith * 36967754Smsmith * The header contains a length field that can be used to determine 37067754Smsmith * the size of the buffer needed to contain the entire table. This 37167754Smsmith * function is not valid for the RSD PTR table since it does not 37267754Smsmith * have a standard header and is fixed length. 37367754Smsmith * 37467754Smsmith ******************************************************************************/ 37567754Smsmith 37667754SmsmithACPI_STATUS 37767754SmsmithAcpiGetTableHeader ( 37867754Smsmith ACPI_TABLE_TYPE TableType, 37967754Smsmith UINT32 Instance, 38067754Smsmith ACPI_TABLE_HEADER *OutTableHeader) 38167754Smsmith{ 38267754Smsmith ACPI_TABLE_HEADER *TblPtr; 38367754Smsmith ACPI_STATUS Status; 38467754Smsmith 38567754Smsmith 38691116Smsmith ACPI_FUNCTION_TRACE ("AcpiGetTableHeader"); 38767754Smsmith 38877424Smsmith 38967754Smsmith if ((Instance == 0) || 39067754Smsmith (TableType == ACPI_TABLE_RSDP) || 39167754Smsmith (!OutTableHeader)) 39267754Smsmith { 39367754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 39467754Smsmith } 39567754Smsmith 39667754Smsmith /* Check the table type and instance */ 39767754Smsmith 39867754Smsmith if ((TableType > ACPI_TABLE_MAX) || 39991116Smsmith (ACPI_IS_SINGLE_TABLE (AcpiGbl_AcpiTableData[TableType].Flags) && 40067754Smsmith Instance > 1)) 40167754Smsmith { 40267754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 40367754Smsmith } 40467754Smsmith 40567754Smsmith 40667754Smsmith /* Get a pointer to the entire table */ 40767754Smsmith 40867754Smsmith Status = AcpiTbGetTablePtr (TableType, Instance, &TblPtr); 40967754Smsmith if (ACPI_FAILURE (Status)) 41067754Smsmith { 41167754Smsmith return_ACPI_STATUS (Status); 41267754Smsmith } 41367754Smsmith 41467754Smsmith /* 41567754Smsmith * The function will return a NULL pointer if the table is not loaded 41667754Smsmith */ 41767754Smsmith if (TblPtr == NULL) 41867754Smsmith { 41967754Smsmith return_ACPI_STATUS (AE_NOT_EXIST); 42067754Smsmith } 42167754Smsmith 42267754Smsmith /* 42367754Smsmith * Copy the header to the caller's buffer 42467754Smsmith */ 42591116Smsmith ACPI_MEMCPY ((void *) OutTableHeader, (void *) TblPtr, 42667754Smsmith sizeof (ACPI_TABLE_HEADER)); 42767754Smsmith 42867754Smsmith return_ACPI_STATUS (Status); 42967754Smsmith} 43067754Smsmith 43167754Smsmith 43267754Smsmith/******************************************************************************* 43367754Smsmith * 43467754Smsmith * FUNCTION: AcpiGetTable 43567754Smsmith * 43667754Smsmith * PARAMETERS: TableType - one of the defined table types 43767754Smsmith * Instance - the non zero instance of the table, allows 43867754Smsmith * support for multiple tables of the same type 43967754Smsmith * see AcpiGbl_AcpiTableFlag 44067754Smsmith * RetBuffer - pointer to a structure containing a buffer to 44167754Smsmith * receive the table 44267754Smsmith * 44367754Smsmith * RETURN: Status 44467754Smsmith * 44567754Smsmith * DESCRIPTION: This function is called to get an ACPI table. The caller 44667754Smsmith * supplies an OutBuffer large enough to contain the entire ACPI 44767754Smsmith * table. The caller should call the AcpiGetTableHeader function 44867754Smsmith * first to determine the buffer size needed. Upon completion 44967754Smsmith * the OutBuffer->Length field will indicate the number of bytes 45067754Smsmith * copied into the OutBuffer->BufPtr buffer. This table will be 45167754Smsmith * a complete table including the header. 45267754Smsmith * 45367754Smsmith ******************************************************************************/ 45467754Smsmith 45567754SmsmithACPI_STATUS 45667754SmsmithAcpiGetTable ( 45767754Smsmith ACPI_TABLE_TYPE TableType, 45867754Smsmith UINT32 Instance, 45967754Smsmith ACPI_BUFFER *RetBuffer) 46067754Smsmith{ 46167754Smsmith ACPI_TABLE_HEADER *TblPtr; 46267754Smsmith ACPI_STATUS Status; 46391116Smsmith UINT32 TableLength; 46467754Smsmith 46567754Smsmith 46691116Smsmith ACPI_FUNCTION_TRACE ("AcpiGetTable"); 46767754Smsmith 46877424Smsmith 46991116Smsmith /* Parameter validation */ 47091116Smsmith 47191116Smsmith if (Instance == 0) 47267754Smsmith { 47367754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 47467754Smsmith } 47567754Smsmith 47691116Smsmith Status = AcpiUtValidateBuffer (RetBuffer); 47791116Smsmith if (ACPI_FAILURE (Status)) 47891116Smsmith { 47991116Smsmith return_ACPI_STATUS (Status); 48091116Smsmith } 48191116Smsmith 48267754Smsmith /* Check the table type and instance */ 48367754Smsmith 48467754Smsmith if ((TableType > ACPI_TABLE_MAX) || 48591116Smsmith (ACPI_IS_SINGLE_TABLE (AcpiGbl_AcpiTableData[TableType].Flags) && 48667754Smsmith Instance > 1)) 48767754Smsmith { 48867754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 48967754Smsmith } 49067754Smsmith 49167754Smsmith 49267754Smsmith /* Get a pointer to the entire table */ 49367754Smsmith 49467754Smsmith Status = AcpiTbGetTablePtr (TableType, Instance, &TblPtr); 49567754Smsmith if (ACPI_FAILURE (Status)) 49667754Smsmith { 49767754Smsmith return_ACPI_STATUS (Status); 49867754Smsmith } 49967754Smsmith 50067754Smsmith /* 50167754Smsmith * AcpiTbGetTablePtr will return a NULL pointer if the 50278986Smsmith * table is not loaded. 50367754Smsmith */ 50467754Smsmith if (TblPtr == NULL) 50567754Smsmith { 50667754Smsmith return_ACPI_STATUS (AE_NOT_EXIST); 50767754Smsmith } 50867754Smsmith 50991116Smsmith /* Get the table length */ 51091116Smsmith 51167754Smsmith if (TableType == ACPI_TABLE_RSDP) 51267754Smsmith { 51367754Smsmith /* 51467754Smsmith * RSD PTR is the only "table" without a header 51567754Smsmith */ 51691116Smsmith TableLength = sizeof (RSDP_DESCRIPTOR); 51767754Smsmith } 51867754Smsmith else 51967754Smsmith { 52091116Smsmith TableLength = TblPtr->Length; 52167754Smsmith } 52267754Smsmith 52391116Smsmith /* Validate/Allocate/Clear caller buffer */ 52491116Smsmith 52591116Smsmith Status = AcpiUtInitializeBuffer (RetBuffer, TableLength); 52691116Smsmith if (ACPI_FAILURE (Status)) 52767754Smsmith { 52891116Smsmith return_ACPI_STATUS (Status); 52967754Smsmith } 53067754Smsmith 53191116Smsmith /* Copy the table to the buffer */ 53267754Smsmith 53391116Smsmith ACPI_MEMCPY ((void *) RetBuffer->Pointer, (void *) TblPtr, TableLength); 53467754Smsmith return_ACPI_STATUS (AE_OK); 53567754Smsmith} 53667754Smsmith 53778986Smsmith 538