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Diffstat (limited to 'sys/contrib/dev/acpica/nsload.c')
| -rw-r--r-- | sys/contrib/dev/acpica/nsload.c | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/nsload.c b/sys/contrib/dev/acpica/nsload.c new file mode 100644 index 0000000..e006ccf --- /dev/null +++ b/sys/contrib/dev/acpica/nsload.c @@ -0,0 +1,712 @@ +/****************************************************************************** + * + * Module Name: nsload - namespace loading/expanding/contracting procedures + * $Revision: 31 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999, Intel Corp. All rights + * reserved. + * + * 2. License + * + * 2.1. This is your license from Intel Corp. under its intellectual property + * rights. You may have additional license terms from the party that provided + * you this software, covering your right to use that party's intellectual + * property rights. + * + * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a + * copy of the source code appearing in this file ("Covered Code") an + * irrevocable, perpetual, worldwide license under Intel's copyrights in the + * base code distributed originally by Intel ("Original Intel Code") to copy, + * make derivatives, distribute, use and display any portion of the Covered + * Code in any form, with the right to sublicense such rights; and + * + * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent + * license (with the right to sublicense), under only those claims of Intel + * patents that are infringed by the Original Intel Code, to make, use, sell, + * offer to sell, and import the Covered Code and derivative works thereof + * solely to the minimum extent necessary to exercise the above copyright + * license, and in no event shall the patent license extend to any additions + * to or modifications of the Original Intel Code. No other license or right + * is granted directly or by implication, estoppel or otherwise; + * + * The above copyright and patent license is granted only if the following + * conditions are met: + * + * 3. Conditions + * + * 3.1. Redistribution of Source with Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification with rights to further distribute source must include + * the above Copyright Notice, the above License, this list of Conditions, + * and the following Disclaimer and Export Compliance provision. In addition, + * Licensee must cause all Covered Code to which Licensee contributes to + * contain a file documenting the changes Licensee made to create that Covered + * Code and the date of any change. Licensee must include in that file the + * documentation of any changes made by any predecessor Licensee. Licensee + * must include a prominent statement that the modification is derived, + * directly or indirectly, from Original Intel Code. + * + * 3.2. Redistribution of Source with no Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification without rights to further distribute source must + * include the following Disclaimer and Export Compliance provision in the + * documentation and/or other materials provided with distribution. In + * addition, Licensee may not authorize further sublicense of source of any + * portion of the Covered Code, and must include terms to the effect that the + * license from Licensee to its licensee is limited to the intellectual + * property embodied in the software Licensee provides to its licensee, and + * not to intellectual property embodied in modifications its licensee may + * make. + * + * 3.3. Redistribution of Executable. Redistribution in executable form of any + * substantial portion of the Covered Code or modification must reproduce the + * above Copyright Notice, and the following Disclaimer and Export Compliance + * provision in the documentation and/or other materials provided with the + * distribution. + * + * 3.4. Intel retains all right, title, and interest in and to the Original + * Intel Code. + * + * 3.5. Neither the name Intel nor any other trademark owned or controlled by + * Intel shall be used in advertising or otherwise to promote the sale, use or + * other dealings in products derived from or relating to the Covered Code + * without prior written authorization from Intel. + * + * 4. Disclaimer and Export Compliance + * + * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED + * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE + * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, + * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY + * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY + * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A + * PARTICULAR PURPOSE. + * + * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES + * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR + * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, + * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY + * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL + * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS + * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY + * LIMITED REMEDY. + * + * 4.3. Licensee shall not export, either directly or indirectly, any of this + * software or system incorporating such software without first obtaining any + * required license or other approval from the U. S. Department of Commerce or + * any other agency or department of the United States Government. In the + * event Licensee exports any such software from the United States or + * re-exports any such software from a foreign destination, Licensee shall + * ensure that the distribution and export/re-export of the software is in + * compliance with all laws, regulations, orders, or other restrictions of the + * U.S. Export Administration Regulations. Licensee agrees that neither it nor + * any of its subsidiaries will export/re-export any technical data, process, + * software, or service, directly or indirectly, to any country for which the + * United States government or any agency thereof requires an export license, + * other governmental approval, or letter of assurance, without first obtaining + * such license, approval or letter. + * + *****************************************************************************/ + +#define __NSLOAD_C__ + +#include "acpi.h" +#include "acinterp.h" +#include "acnamesp.h" +#include "amlcode.h" +#include "acparser.h" +#include "acdispat.h" +#include "acdebug.h" + + +#define _COMPONENT NAMESPACE + MODULE_NAME ("nsload") + + +/****************************************************************************** + * + * FUNCTION: AcpiLoadNamespace + * + * PARAMETERS: DisplayAmlDuringLoad + * + * RETURN: Status + * + * DESCRIPTION: Load the name space from what ever is pointed to by DSDT. + * (DSDT points to either the BIOS or a buffer.) + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsLoadNamespace ( + void) +{ + ACPI_STATUS Status; + + + FUNCTION_TRACE ("AcpiLoadNameSpace"); + + + /* There must be at least a DSDT installed */ + + if (AcpiGbl_DSDT == NULL) + { + DEBUG_PRINT (ACPI_ERROR, ("DSDT is not in memory\n")); + return_ACPI_STATUS (AE_NO_ACPI_TABLES); + } + + + /* + * Load the namespace. The DSDT is required, + * but the SSDT and PSDT tables are optional. + */ + + Status = AcpiNsLoadTableByType (ACPI_TABLE_DSDT); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Ignore exceptions from these */ + + AcpiNsLoadTableByType (ACPI_TABLE_SSDT); + AcpiNsLoadTableByType (ACPI_TABLE_PSDT); + + + DEBUG_PRINT_RAW (ACPI_OK, + ("ACPI Namespace successfully loaded at root 0x%p\n", + AcpiGbl_RootNode)); + + + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsOneParsePass + * + * PARAMETERS: + * + * RETURN: Status + * + * DESCRIPTION: + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsOneCompleteParse ( + UINT32 PassNumber, + ACPI_TABLE_DESC *TableDesc) +{ + ACPI_PARSE_DOWNWARDS DescendingCallback; + ACPI_PARSE_UPWARDS AscendingCallback; + ACPI_PARSE_OBJECT *ParseRoot; + ACPI_STATUS Status; + + + FUNCTION_TRACE ("NsOneCompleteParse"); + + + switch (PassNumber) + { + case 1: + DescendingCallback = AcpiDsLoad1BeginOp; + AscendingCallback = AcpiDsLoad1EndOp; + break; + + case 2: + DescendingCallback = AcpiDsLoad2BeginOp; + AscendingCallback = AcpiDsLoad2EndOp; + break; + + case 3: + DescendingCallback = AcpiDsExecBeginOp; + AscendingCallback = AcpiDsExecEndOp; + break; + + default: + return (AE_BAD_PARAMETER); + } + + /* Create and init a Root Node */ + + ParseRoot = AcpiPsAllocOp (AML_SCOPE_OP); + if (!ParseRoot) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + ((ACPI_PARSE2_OBJECT *) ParseRoot)->Name = ACPI_ROOT_NAME; + + + /* Pass 1: Parse everything except control method bodies */ + + DEBUG_PRINT (TRACE_PARSE, + ("NsParseTable: *PARSE* pass %d parse\n", PassNumber)); + + Status = AcpiPsParseAml (ParseRoot, + TableDesc->AmlPointer, + TableDesc->AmlLength, + ACPI_PARSE_LOAD_PASS1 | ACPI_PARSE_DELETE_TREE, + NULL, NULL, NULL, + DescendingCallback, + AscendingCallback); + + AcpiPsDeleteParseTree (ParseRoot); + + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsParseTable + * + * PARAMETERS: TableDesc - An ACPI table descriptor for table to parse + * StartNode - Where to enter the table into the namespace + * + * RETURN: Status + * + * DESCRIPTION: Parse AML within an ACPI table and return a tree of ops + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsParseTable ( + ACPI_TABLE_DESC *TableDesc, + ACPI_NAMESPACE_NODE *StartNode) +{ + ACPI_STATUS Status; + + + FUNCTION_TRACE ("NsParseTable"); + + + /* + * AML Parse, pass 1 + * + * In this pass, we load most of the namespace. Control methods + * are not parsed until later. A parse tree is not created. Instead, + * each Parser Op subtree is deleted when it is finished. This saves + * a great deal of memory, and allows a small cache of parse objects + * to service the entire parse. The second pass of the parse then + * performs another complete parse of the AML.. + */ + + Status = AcpiNsOneCompleteParse (1, TableDesc); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + + /* + * AML Parse, pass 2 + * + * In this pass, we resolve forward references and other things + * that could not be completed during the first pass. + * Another complete parse of the AML is performed, but the + * overhead of this is compensated for by the fact that the + * parse objects are all cached. + */ + + Status = AcpiNsOneCompleteParse (2, TableDesc); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + + /* TBD: no longer needed, remove */ + + AcpiGbl_ParsedNamespaceRoot = NULL; + + + return_ACPI_STATUS (Status); +} + + +/***************************************************************************** + * + * FUNCTION: AcpiNsLoadTable + * + * PARAMETERS: *PcodeAddr - Address of pcode block + * PcodeLength - Length of pcode block + * + * RETURN: Status + * + * DESCRIPTION: Load one ACPI table into the namespace + * + ****************************************************************************/ + +ACPI_STATUS +AcpiNsLoadTable ( + ACPI_TABLE_DESC *TableDesc, + ACPI_NAMESPACE_NODE *Node) +{ + ACPI_STATUS Status; + + + FUNCTION_TRACE ("NsLoadTable"); + + + if (!TableDesc->AmlPointer) + { + DEBUG_PRINT (ACPI_ERROR, ("NsLoadTable: Null AML pointer\n")); + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + DEBUG_PRINT (ACPI_INFO, + ("NsLoadTable: AML block at %p\n", TableDesc->AmlPointer)); + + + if (!TableDesc->AmlLength) + { + DEBUG_PRINT (ACPI_ERROR, + ("NsLoadTable: Zero-length AML block\n")); + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + + /* + * Parse the table and load the namespace with all named + * objects found within. Control methods are NOT parsed + * at this time. In fact, the control methods cannot be + * parsed until the entire namespace is loaded, because + * if a control method makes a forward reference (call) + * to another control method, we can't continue parsing + * because we don't know how many arguments to parse next! + */ + + DEBUG_PRINT (ACPI_INFO, + ("NsLoadTable: **** Loading table into namespace ****\n")); + + AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE); + Status = AcpiNsParseTable (TableDesc, Node->Child); + AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE); + + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* + * Now we can parse the control methods. We always parse + * them here for a sanity check, and if configured for + * just-in-time parsing, we delete the control method + * parse trees. + */ + + DEBUG_PRINT (ACPI_INFO, + ("NsLoadTable: **** Begin Table Method Parsing and Object Initialization ****\n")); + + Status = AcpiDsInitializeObjects (TableDesc, Node); + + DEBUG_PRINT (ACPI_INFO, + ("NsLoadTable: **** Completed Table Method Parsing and Object Initialization ****\n")); + + return_ACPI_STATUS (Status); +} + + +/****************************************************************************** + * + * FUNCTION: AcpiNsLoadTableByType + * + * PARAMETERS: TableType - Id of the table type to load + * + * RETURN: Status + * + * DESCRIPTION: Load an ACPI table or tables into the namespace. All tables + * of the given type are loaded. The mechanism allows this + * routine to be called repeatedly. + * + *****************************************************************************/ + +ACPI_STATUS +AcpiNsLoadTableByType ( + ACPI_TABLE_TYPE TableType) +{ + UINT32 i; + ACPI_STATUS Status = AE_OK; + ACPI_TABLE_HEADER *TablePtr; + ACPI_TABLE_DESC *TableDesc; + + + FUNCTION_TRACE ("NsLoadTableByType"); + + + AcpiCmAcquireMutex (ACPI_MTX_TABLES); + + + /* + * Table types supported are: + * DSDT (one), SSDT/PSDT (multiple) + */ + + switch (TableType) + { + + case ACPI_TABLE_DSDT: + + DEBUG_PRINT (ACPI_INFO, ("NsLoadTableByType: Loading DSDT\n")); + + TableDesc = &AcpiGbl_AcpiTables[ACPI_TABLE_DSDT]; + + /* If table already loaded into namespace, just return */ + + if (TableDesc->LoadedIntoNamespace) + { + goto UnlockAndExit; + } + + TableDesc->TableId = TABLE_ID_DSDT; + + /* Now load the single DSDT */ + + Status = AcpiNsLoadTable (TableDesc, AcpiGbl_RootNode); + if (ACPI_SUCCESS (Status)) + { + TableDesc->LoadedIntoNamespace = TRUE; + } + + break; + + + case ACPI_TABLE_SSDT: + + DEBUG_PRINT (ACPI_INFO, + ("NsLoadTableByType: Loading %d SSDTs\n", + AcpiGbl_AcpiTables[ACPI_TABLE_SSDT].Count)); + + /* + * Traverse list of SSDT tables + */ + + TableDesc = &AcpiGbl_AcpiTables[ACPI_TABLE_SSDT]; + for (i = 0; i < AcpiGbl_AcpiTables[ACPI_TABLE_SSDT].Count; i++) + { + TablePtr = TableDesc->Pointer; + + /* + * Only attempt to load table if it is not + * already loaded! + */ + + if (!TableDesc->LoadedIntoNamespace) + { + Status = AcpiNsLoadTable (TableDesc, + AcpiGbl_RootNode); + if (ACPI_FAILURE (Status)) + { + break; + } + + TableDesc->LoadedIntoNamespace = TRUE; + } + + TableDesc = TableDesc->Next; + } + + break; + + + case ACPI_TABLE_PSDT: + + DEBUG_PRINT (ACPI_INFO, + ("NsLoadTableByType: Loading %d PSDTs\n", + AcpiGbl_AcpiTables[ACPI_TABLE_PSDT].Count)); + + /* + * Traverse list of PSDT tables + */ + + TableDesc = &AcpiGbl_AcpiTables[ACPI_TABLE_PSDT]; + + for (i = 0; i < AcpiGbl_AcpiTables[ACPI_TABLE_PSDT].Count; i++) + { + TablePtr = TableDesc->Pointer; + + /* Only attempt to load table if it is not already loaded! */ + + if (!TableDesc->LoadedIntoNamespace) + { + Status = AcpiNsLoadTable (TableDesc, + AcpiGbl_RootNode); + if (ACPI_FAILURE (Status)) + { + break; + } + + TableDesc->LoadedIntoNamespace = TRUE; + } + + TableDesc = TableDesc->Next; + } + + break; + + + default: + Status = AE_SUPPORT; + } + + +UnlockAndExit: + + AcpiCmReleaseMutex (ACPI_MTX_TABLES); + + return_ACPI_STATUS (Status); + +} + + +/****************************************************************************** + * + * FUNCTION: AcpiNsDeleteSubtree + * + * PARAMETERS: StartHandle - Handle in namespace where search begins + * + * RETURNS Status + * + * DESCRIPTION: Walks the namespace starting at the given handle and deletes + * all objects, entries, and scopes in the entire subtree. + * + * TBD: [Investigate] What if any part of this subtree is in use? + * (i.e. on one of the object stacks?) + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsDeleteSubtree ( + ACPI_HANDLE StartHandle) +{ + ACPI_STATUS Status; + ACPI_HANDLE ChildHandle; + ACPI_HANDLE ParentHandle; + ACPI_HANDLE NextChildHandle; + ACPI_HANDLE Dummy; + UINT32 Level; + + + FUNCTION_TRACE ("NsDeleteSubtree"); + + + ParentHandle = StartHandle; + ChildHandle = 0; + Level = 1; + + /* + * Traverse the tree of objects until we bubble back up + * to where we started. + */ + + while (Level > 0) + { + /* Attempt to get the next object in this scope */ + + Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle, + ChildHandle, + &NextChildHandle); + + ChildHandle = NextChildHandle; + + + /* Did we get a new object? */ + + if (ACPI_SUCCESS (Status)) + { + /* Check if this object has any children */ + + if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, + ChildHandle, 0, + &Dummy))) + { + /* + * There is at least one child of this object, + * visit the object + */ + + Level++; + ParentHandle = ChildHandle; + ChildHandle = 0; + } + } + + else + { + /* + * No more children in this object, go back up to + * the object's parent + */ + Level--; + + /* Delete all children now */ + + AcpiNsDeleteChildren (ChildHandle); + + ChildHandle = ParentHandle; + AcpiGetParent (ParentHandle, &ParentHandle); + } + } + + /* Now delete the starting object, and we are done */ + + AcpiNsDeleteNode (ChildHandle); + + + return_ACPI_STATUS (AE_OK); +} + + +/**************************************************************************** + * + * FUNCTION: AcpiNsUnloadNameSpace + * + * PARAMETERS: Handle - Root of namespace subtree to be deleted + * + * RETURN: Status + * + * DESCRIPTION: Shrinks the namespace, typically in response to an undocking + * event. Deletes an entire subtree starting from (and + * including) the given handle. + * + ****************************************************************************/ + +ACPI_STATUS +AcpiNsUnloadNamespace ( + ACPI_HANDLE Handle) +{ + ACPI_STATUS Status; + + + FUNCTION_TRACE ("NsUnloadNameSpace"); + + + /* Parameter validation */ + + if (!AcpiGbl_RootNode) + { + return_ACPI_STATUS (AE_NO_NAMESPACE); + } + + if (!Handle) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + + /* This function does the real work */ + + Status = AcpiNsDeleteSubtree (Handle); + + return_ACPI_STATUS (Status); +} + + |
