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+/******************************************************************************
+ *
+ * Module Name: uteval - Object evaluation
+ *
+ *****************************************************************************/
+
+/*
+ * 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 __UTEVAL_C__
+
+#include "acpi.h"
+#include "accommon.h"
+#include "acnamesp.h"
+
+
+#define _COMPONENT ACPI_UTILITIES
+ ACPI_MODULE_NAME ("uteval")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiUtEvaluateObject
+ *
+ * PARAMETERS: PrefixNode - Starting node
+ * Path - Path to object from starting node
+ * ExpectedReturnTypes - Bitmap of allowed return types
+ * ReturnDesc - Where a return value is stored
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Evaluates a namespace object and verifies the type of the
+ * return object. Common code that simplifies accessing objects
+ * that have required return objects of fixed types.
+ *
+ * NOTE: Internal function, no parameter validation
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiUtEvaluateObject (
+ ACPI_NAMESPACE_NODE *PrefixNode,
+ char *Path,
+ UINT32 ExpectedReturnBtypes,
+ ACPI_OPERAND_OBJECT **ReturnDesc)
+{
+ ACPI_EVALUATE_INFO *Info;
+ ACPI_STATUS Status;
+ UINT32 ReturnBtype;
+
+
+ ACPI_FUNCTION_TRACE (UtEvaluateObject);
+
+
+ /* Allocate the evaluation information block */
+
+ Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
+ if (!Info)
+ {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ Info->PrefixNode = PrefixNode;
+ Info->Pathname = Path;
+
+ /* Evaluate the object/method */
+
+ Status = AcpiNsEvaluate (Info);
+ if (ACPI_FAILURE (Status))
+ {
+ if (Status == AE_NOT_FOUND)
+ {
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n",
+ AcpiUtGetNodeName (PrefixNode), Path));
+ }
+ else
+ {
+ ACPI_ERROR_METHOD ("Method execution failed",
+ PrefixNode, Path, Status);
+ }
+
+ goto Cleanup;
+ }
+
+ /* Did we get a return object? */
+
+ if (!Info->ReturnObject)
+ {
+ if (ExpectedReturnBtypes)
+ {
+ ACPI_ERROR_METHOD ("No object was returned from",
+ PrefixNode, Path, AE_NOT_EXIST);
+
+ Status = AE_NOT_EXIST;
+ }
+
+ goto Cleanup;
+ }
+
+ /* Map the return object type to the bitmapped type */
+
+ switch ((Info->ReturnObject)->Common.Type)
+ {
+ case ACPI_TYPE_INTEGER:
+ ReturnBtype = ACPI_BTYPE_INTEGER;
+ break;
+
+ case ACPI_TYPE_BUFFER:
+ ReturnBtype = ACPI_BTYPE_BUFFER;
+ break;
+
+ case ACPI_TYPE_STRING:
+ ReturnBtype = ACPI_BTYPE_STRING;
+ break;
+
+ case ACPI_TYPE_PACKAGE:
+ ReturnBtype = ACPI_BTYPE_PACKAGE;
+ break;
+
+ default:
+ ReturnBtype = 0;
+ break;
+ }
+
+ if ((AcpiGbl_EnableInterpreterSlack) &&
+ (!ExpectedReturnBtypes))
+ {
+ /*
+ * We received a return object, but one was not expected. This can
+ * happen frequently if the "implicit return" feature is enabled.
+ * Just delete the return object and return AE_OK.
+ */
+ AcpiUtRemoveReference (Info->ReturnObject);
+ goto Cleanup;
+ }
+
+ /* Is the return object one of the expected types? */
+
+ if (!(ExpectedReturnBtypes & ReturnBtype))
+ {
+ ACPI_ERROR_METHOD ("Return object type is incorrect",
+ PrefixNode, Path, AE_TYPE);
+
+ ACPI_ERROR ((AE_INFO,
+ "Type returned from %s was incorrect: %s, expected Btypes: 0x%X",
+ Path, AcpiUtGetObjectTypeName (Info->ReturnObject),
+ ExpectedReturnBtypes));
+
+ /* On error exit, we must delete the return object */
+
+ AcpiUtRemoveReference (Info->ReturnObject);
+ Status = AE_TYPE;
+ goto Cleanup;
+ }
+
+ /* Object type is OK, return it */
+
+ *ReturnDesc = Info->ReturnObject;
+
+Cleanup:
+ ACPI_FREE (Info);
+ return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiUtEvaluateNumericObject
+ *
+ * PARAMETERS: ObjectName - Object name to be evaluated
+ * DeviceNode - Node for the device
+ * Value - Where the value is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Evaluates a numeric namespace object for a selected device
+ * and stores result in *Value.
+ *
+ * NOTE: Internal function, no parameter validation
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiUtEvaluateNumericObject (
+ char *ObjectName,
+ ACPI_NAMESPACE_NODE *DeviceNode,
+ UINT64 *Value)
+{
+ ACPI_OPERAND_OBJECT *ObjDesc;
+ ACPI_STATUS Status;
+
+
+ ACPI_FUNCTION_TRACE (UtEvaluateNumericObject);
+
+
+ Status = AcpiUtEvaluateObject (DeviceNode, ObjectName,
+ ACPI_BTYPE_INTEGER, &ObjDesc);
+ if (ACPI_FAILURE (Status))
+ {
+ return_ACPI_STATUS (Status);
+ }
+
+ /* Get the returned Integer */
+
+ *Value = ObjDesc->Integer.Value;
+
+ /* On exit, we must delete the return object */
+
+ AcpiUtRemoveReference (ObjDesc);
+ return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiUtExecute_STA
+ *
+ * PARAMETERS: DeviceNode - Node for the device
+ * Flags - Where the status flags are returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Executes _STA for selected device and stores results in
+ * *Flags.
+ *
+ * NOTE: Internal function, no parameter validation
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiUtExecute_STA (
+ ACPI_NAMESPACE_NODE *DeviceNode,
+ UINT32 *Flags)
+{
+ ACPI_OPERAND_OBJECT *ObjDesc;
+ ACPI_STATUS Status;
+
+
+ ACPI_FUNCTION_TRACE (UtExecute_STA);
+
+
+ Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__STA,
+ ACPI_BTYPE_INTEGER, &ObjDesc);
+ if (ACPI_FAILURE (Status))
+ {
+ if (AE_NOT_FOUND == Status)
+ {
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
+ "_STA on %4.4s was not found, assuming device is present\n",
+ AcpiUtGetNodeName (DeviceNode)));
+
+ *Flags = ACPI_UINT32_MAX;
+ Status = AE_OK;
+ }
+
+ return_ACPI_STATUS (Status);
+ }
+
+ /* Extract the status flags */
+
+ *Flags = (UINT32) ObjDesc->Integer.Value;
+
+ /* On exit, we must delete the return object */
+
+ AcpiUtRemoveReference (ObjDesc);
+ return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiUtExecutePowerMethods
+ *
+ * PARAMETERS: DeviceNode - Node for the device
+ * MethodNames - Array of power method names
+ * MethodCount - Number of methods to execute
+ * OutValues - Where the power method values are returned
+ *
+ * RETURN: Status, OutValues
+ *
+ * DESCRIPTION: Executes the specified power methods for the device and returns
+ * the result(s).
+ *
+ * NOTE: Internal function, no parameter validation
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiUtExecutePowerMethods (
+ ACPI_NAMESPACE_NODE *DeviceNode,
+ const char **MethodNames,
+ UINT8 MethodCount,
+ UINT8 *OutValues)
+{
+ ACPI_OPERAND_OBJECT *ObjDesc;
+ ACPI_STATUS Status;
+ ACPI_STATUS FinalStatus = AE_NOT_FOUND;
+ UINT32 i;
+
+
+ ACPI_FUNCTION_TRACE (UtExecutePowerMethods);
+
+
+ for (i = 0; i < MethodCount; i++)
+ {
+ /*
+ * Execute the power method (_SxD or _SxW). The only allowable
+ * return type is an Integer.
+ */
+ Status = AcpiUtEvaluateObject (DeviceNode,
+ ACPI_CAST_PTR (char, MethodNames[i]),
+ ACPI_BTYPE_INTEGER, &ObjDesc);
+ if (ACPI_SUCCESS (Status))
+ {
+ OutValues[i] = (UINT8) ObjDesc->Integer.Value;
+
+ /* Delete the return object */
+
+ AcpiUtRemoveReference (ObjDesc);
+ FinalStatus = AE_OK; /* At least one value is valid */
+ continue;
+ }
+
+ OutValues[i] = ACPI_UINT8_MAX;
+ if (Status == AE_NOT_FOUND)
+ {
+ continue; /* Ignore if not found */
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Failed %s on Device %4.4s, %s\n",
+ ACPI_CAST_PTR (char, MethodNames[i]),
+ AcpiUtGetNodeName (DeviceNode), AcpiFormatException (Status)));
+ }
+
+ return_ACPI_STATUS (FinalStatus);
+}
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