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author | jkim <jkim@FreeBSD.org> | 2012-02-16 22:59:29 +0000 |
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committer | jkim <jkim@FreeBSD.org> | 2012-02-16 22:59:29 +0000 |
commit | a561c762bacb78b14d2bf5fb20afc1566203f990 (patch) | |
tree | d4ae2db1980d2ec7b164b1a5658fd2ae62569456 /sys/contrib/dev/acpica/components/namespace/nseval.c | |
parent | 2b86faa18cb89921d202e133fa6a1c39b63cfe16 (diff) | |
parent | a6dfe3119152f97e640cc135d963b9f7c95c84ef (diff) | |
download | FreeBSD-src-a561c762bacb78b14d2bf5fb20afc1566203f990.zip FreeBSD-src-a561c762bacb78b14d2bf5fb20afc1566203f990.tar.gz |
Merge ACPICA 20120215.
Diffstat (limited to 'sys/contrib/dev/acpica/components/namespace/nseval.c')
-rw-r--r-- | sys/contrib/dev/acpica/components/namespace/nseval.c | 485 |
1 files changed, 485 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/namespace/nseval.c b/sys/contrib/dev/acpica/components/namespace/nseval.c new file mode 100644 index 0000000..9a97c6f --- /dev/null +++ b/sys/contrib/dev/acpica/components/namespace/nseval.c @@ -0,0 +1,485 @@ +/******************************************************************************* + * + * Module Name: nseval - Object evaluation, includes control method execution + * + ******************************************************************************/ + +/* + * 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 __NSEVAL_C__ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acparser.h> +#include <contrib/dev/acpica/include/acinterp.h> +#include <contrib/dev/acpica/include/acnamesp.h> + + +#define _COMPONENT ACPI_NAMESPACE + ACPI_MODULE_NAME ("nseval") + +/* Local prototypes */ + +static void +AcpiNsExecModuleCode ( + ACPI_OPERAND_OBJECT *MethodObj, + ACPI_EVALUATE_INFO *Info); + + +/******************************************************************************* + * + * FUNCTION: AcpiNsEvaluate + * + * PARAMETERS: Info - Evaluation info block, contains: + * PrefixNode - Prefix or Method/Object Node to execute + * Pathname - Name of method to execute, If NULL, the + * Node is the object to execute + * Parameters - List of parameters to pass to the method, + * terminated by NULL. Params itself may be + * NULL if no parameters are being passed. + * ReturnObject - Where to put method's return value (if + * any). If NULL, no value is returned. + * ParameterType - Type of Parameter list + * ReturnObject - Where to put method's return value (if + * any). If NULL, no value is returned. + * Flags - ACPI_IGNORE_RETURN_VALUE to delete return + * + * RETURN: Status + * + * DESCRIPTION: Execute a control method or return the current value of an + * ACPI namespace object. + * + * MUTEX: Locks interpreter + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsEvaluate ( + ACPI_EVALUATE_INFO *Info) +{ + ACPI_STATUS Status; + ACPI_NAMESPACE_NODE *Node; + + + ACPI_FUNCTION_TRACE (NsEvaluate); + + + if (!Info) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* Initialize the return value to an invalid object */ + + Info->ReturnObject = NULL; + Info->ParamCount = 0; + + /* + * Get the actual namespace node for the target object. Handles these cases: + * + * 1) Null node, Pathname (absolute path) + * 2) Node, Pathname (path relative to Node) + * 3) Node, Null Pathname + */ + Status = AcpiNsGetNode (Info->PrefixNode, Info->Pathname, + ACPI_NS_NO_UPSEARCH, &Info->ResolvedNode); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* + * For a method alias, we must grab the actual method node so that proper + * scoping context will be established before execution. + */ + if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_LOCAL_METHOD_ALIAS) + { + Info->ResolvedNode = + ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Info->ResolvedNode->Object); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", Info->Pathname, + Info->ResolvedNode, AcpiNsGetAttachedObject (Info->ResolvedNode))); + + Node = Info->ResolvedNode; + + /* + * Two major cases here: + * + * 1) The object is a control method -- execute it + * 2) The object is not a method -- just return it's current value + */ + if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_METHOD) + { + /* + * 1) Object is a control method - execute it + */ + + /* Verify that there is a method object associated with this node */ + + Info->ObjDesc = AcpiNsGetAttachedObject (Info->ResolvedNode); + if (!Info->ObjDesc) + { + ACPI_ERROR ((AE_INFO, "Control method has no attached sub-object")); + return_ACPI_STATUS (AE_NULL_OBJECT); + } + + /* Count the number of arguments being passed to the method */ + + if (Info->Parameters) + { + while (Info->Parameters[Info->ParamCount]) + { + if (Info->ParamCount > ACPI_METHOD_MAX_ARG) + { + return_ACPI_STATUS (AE_LIMIT); + } + Info->ParamCount++; + } + } + + ACPI_DUMP_PATHNAME (Info->ResolvedNode, "ACPI: Execute Method", + ACPI_LV_INFO, _COMPONENT); + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, + "Method at AML address %p Length %X\n", + Info->ObjDesc->Method.AmlStart + 1, + Info->ObjDesc->Method.AmlLength - 1)); + + /* + * Any namespace deletion must acquire both the namespace and + * interpreter locks to ensure that no thread is using the portion of + * the namespace that is being deleted. + * + * Execute the method via the interpreter. The interpreter is locked + * here before calling into the AML parser + */ + AcpiExEnterInterpreter (); + Status = AcpiPsExecuteMethod (Info); + AcpiExExitInterpreter (); + } + else + { + /* + * 2) Object is not a method, return its current value + * + * Disallow certain object types. For these, "evaluation" is undefined. + */ + switch (Info->ResolvedNode->Type) + { + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_EVENT: + case ACPI_TYPE_MUTEX: + case ACPI_TYPE_REGION: + case ACPI_TYPE_THERMAL: + case ACPI_TYPE_LOCAL_SCOPE: + + ACPI_ERROR ((AE_INFO, + "[%4.4s] Evaluation of object type [%s] is not supported", + Info->ResolvedNode->Name.Ascii, + AcpiUtGetTypeName (Info->ResolvedNode->Type))); + + return_ACPI_STATUS (AE_TYPE); + + default: + break; + } + + /* + * Objects require additional resolution steps (e.g., the Node may be + * a field that must be read, etc.) -- we can't just grab the object + * out of the node. + * + * Use ResolveNodeToValue() to get the associated value. + * + * NOTE: we can get away with passing in NULL for a walk state because + * ResolvedNode is guaranteed to not be a reference to either a method + * local or a method argument (because this interface is never called + * from a running method.) + * + * Even though we do not directly invoke the interpreter for object + * resolution, we must lock it because we could access an opregion. + * The opregion access code assumes that the interpreter is locked. + */ + AcpiExEnterInterpreter (); + + /* Function has a strange interface */ + + Status = AcpiExResolveNodeToValue (&Info->ResolvedNode, NULL); + AcpiExExitInterpreter (); + + /* + * If AcpiExResolveNodeToValue() succeeded, the return value was placed + * in ResolvedNode. + */ + if (ACPI_SUCCESS (Status)) + { + Status = AE_CTRL_RETURN_VALUE; + Info->ReturnObject = + ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->ResolvedNode); + + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returning object %p [%s]\n", + Info->ReturnObject, + AcpiUtGetObjectTypeName (Info->ReturnObject))); + } + } + + /* + * Check input argument count against the ASL-defined count for a method. + * Also check predefined names: argument count and return value against + * the ACPI specification. Some incorrect return value types are repaired. + */ + (void) AcpiNsCheckPredefinedNames (Node, Info->ParamCount, + Status, &Info->ReturnObject); + + /* Check if there is a return value that must be dealt with */ + + if (Status == AE_CTRL_RETURN_VALUE) + { + /* If caller does not want the return value, delete it */ + + if (Info->Flags & ACPI_IGNORE_RETURN_VALUE) + { + AcpiUtRemoveReference (Info->ReturnObject); + Info->ReturnObject = NULL; + } + + /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */ + + Status = AE_OK; + } + + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, + "*** Completed evaluation of object %s ***\n", Info->Pathname)); + + /* + * Namespace was unlocked by the handling AcpiNs* function, so we + * just return + */ + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsExecModuleCodeList + * + * PARAMETERS: None + * + * RETURN: None. Exceptions during method execution are ignored, since + * we cannot abort a table load. + * + * DESCRIPTION: Execute all elements of the global module-level code list. + * Each element is executed as a single control method. + * + ******************************************************************************/ + +void +AcpiNsExecModuleCodeList ( + void) +{ + ACPI_OPERAND_OBJECT *Prev; + ACPI_OPERAND_OBJECT *Next; + ACPI_EVALUATE_INFO *Info; + UINT32 MethodCount = 0; + + + ACPI_FUNCTION_TRACE (NsExecModuleCodeList); + + + /* Exit now if the list is empty */ + + Next = AcpiGbl_ModuleCodeList; + if (!Next) + { + return_VOID; + } + + /* Allocate the evaluation information block */ + + Info = ACPI_ALLOCATE (sizeof (ACPI_EVALUATE_INFO)); + if (!Info) + { + return_VOID; + } + + /* Walk the list, executing each "method" */ + + while (Next) + { + Prev = Next; + Next = Next->Method.Mutex; + + /* Clear the link field and execute the method */ + + Prev->Method.Mutex = NULL; + AcpiNsExecModuleCode (Prev, Info); + MethodCount++; + + /* Delete the (temporary) method object */ + + AcpiUtRemoveReference (Prev); + } + + ACPI_INFO ((AE_INFO, + "Executed %u blocks of module-level executable AML code", + MethodCount)); + + ACPI_FREE (Info); + AcpiGbl_ModuleCodeList = NULL; + return_VOID; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsExecModuleCode + * + * PARAMETERS: MethodObj - Object container for the module-level code + * Info - Info block for method evaluation + * + * RETURN: None. Exceptions during method execution are ignored, since + * we cannot abort a table load. + * + * DESCRIPTION: Execute a control method containing a block of module-level + * executable AML code. The control method is temporarily + * installed to the root node, then evaluated. + * + ******************************************************************************/ + +static void +AcpiNsExecModuleCode ( + ACPI_OPERAND_OBJECT *MethodObj, + ACPI_EVALUATE_INFO *Info) +{ + ACPI_OPERAND_OBJECT *ParentObj; + ACPI_NAMESPACE_NODE *ParentNode; + ACPI_OBJECT_TYPE Type; + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (NsExecModuleCode); + + + /* + * Get the parent node. We cheat by using the NextObject field + * of the method object descriptor. + */ + ParentNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, + MethodObj->Method.NextObject); + Type = AcpiNsGetType (ParentNode); + + /* + * Get the region handler and save it in the method object. We may need + * this if an operation region declaration causes a _REG method to be run. + * + * We can't do this in AcpiPsLinkModuleCode because + * AcpiGbl_RootNode->Object is NULL at PASS1. + */ + if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object) + { + MethodObj->Method.Dispatch.Handler = + ParentNode->Object->Device.Handler; + } + + /* Must clear NextObject (AcpiNsAttachObject needs the field) */ + + MethodObj->Method.NextObject = NULL; + + /* Initialize the evaluation information block */ + + ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO)); + Info->PrefixNode = ParentNode; + + /* + * Get the currently attached parent object. Add a reference, because the + * ref count will be decreased when the method object is installed to + * the parent node. + */ + ParentObj = AcpiNsGetAttachedObject (ParentNode); + if (ParentObj) + { + AcpiUtAddReference (ParentObj); + } + + /* Install the method (module-level code) in the parent node */ + + Status = AcpiNsAttachObject (ParentNode, MethodObj, + ACPI_TYPE_METHOD); + if (ACPI_FAILURE (Status)) + { + goto Exit; + } + + /* Execute the parent node as a control method */ + + Status = AcpiNsEvaluate (Info); + + ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Executed module-level code at %p\n", + MethodObj->Method.AmlStart)); + + /* Delete a possible implicit return value (in slack mode) */ + + if (Info->ReturnObject) + { + AcpiUtRemoveReference (Info->ReturnObject); + } + + /* Detach the temporary method object */ + + AcpiNsDetachObject (ParentNode); + + /* Restore the original parent object */ + + if (ParentObj) + { + Status = AcpiNsAttachObject (ParentNode, ParentObj, Type); + } + else + { + ParentNode->Type = (UINT8) Type; + } + +Exit: + if (ParentObj) + { + AcpiUtRemoveReference (ParentObj); + } + return_VOID; +} + |