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+
+/******************************************************************************
+ *
+ * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
+ *
+ *****************************************************************************/
+
+/*
+ * 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 __EXOPARG3_C__
+
+#include "acpi.h"
+#include "accommon.h"
+#include "acinterp.h"
+#include "acparser.h"
+#include "amlcode.h"
+
+
+#define _COMPONENT ACPI_EXECUTER
+ ACPI_MODULE_NAME ("exoparg3")
+
+
+/*!
+ * Naming convention for AML interpreter execution routines.
+ *
+ * The routines that begin execution of AML opcodes are named with a common
+ * convention based upon the number of arguments, the number of target operands,
+ * and whether or not a value is returned:
+ *
+ * AcpiExOpcode_xA_yT_zR
+ *
+ * Where:
+ *
+ * xA - ARGUMENTS: The number of arguments (input operands) that are
+ * required for this opcode type (1 through 6 args).
+ * yT - TARGETS: The number of targets (output operands) that are required
+ * for this opcode type (0, 1, or 2 targets).
+ * zR - RETURN VALUE: Indicates whether this opcode type returns a value
+ * as the function return (0 or 1).
+ *
+ * The AcpiExOpcode* functions are called via the Dispatcher component with
+ * fully resolved operands.
+!*/
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExOpcode_3A_0T_0R
+ *
+ * PARAMETERS: WalkState - Current walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute Triadic operator (3 operands)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiExOpcode_3A_0T_0R (
+ ACPI_WALK_STATE *WalkState)
+{
+ ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
+ ACPI_SIGNAL_FATAL_INFO *Fatal;
+ ACPI_STATUS Status = AE_OK;
+
+
+ ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
+ AcpiPsGetOpcodeName (WalkState->Opcode));
+
+
+ switch (WalkState->Opcode)
+ {
+ case AML_FATAL_OP: /* Fatal (FatalType FatalCode FatalArg) */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
+ (UINT32) Operand[0]->Integer.Value,
+ (UINT32) Operand[1]->Integer.Value,
+ (UINT32) Operand[2]->Integer.Value));
+
+ Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
+ if (Fatal)
+ {
+ Fatal->Type = (UINT32) Operand[0]->Integer.Value;
+ Fatal->Code = (UINT32) Operand[1]->Integer.Value;
+ Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
+ }
+
+ /* Always signal the OS! */
+
+ Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
+
+ /* Might return while OS is shutting down, just continue */
+
+ ACPI_FREE (Fatal);
+ break;
+
+
+ default:
+
+ ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
+ WalkState->Opcode));
+ Status = AE_AML_BAD_OPCODE;
+ goto Cleanup;
+ }
+
+
+Cleanup:
+
+ return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiExOpcode_3A_1T_1R
+ *
+ * PARAMETERS: WalkState - Current walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute Triadic operator (3 operands)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiExOpcode_3A_1T_1R (
+ ACPI_WALK_STATE *WalkState)
+{
+ ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
+ ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
+ char *Buffer = NULL;
+ ACPI_STATUS Status = AE_OK;
+ UINT64 Index;
+ ACPI_SIZE Length;
+
+
+ ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
+ AcpiPsGetOpcodeName (WalkState->Opcode));
+
+
+ switch (WalkState->Opcode)
+ {
+ case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
+
+ /*
+ * Create the return object. The Source operand is guaranteed to be
+ * either a String or a Buffer, so just use its type.
+ */
+ ReturnDesc = AcpiUtCreateInternalObject (
+ (Operand[0])->Common.Type);
+ if (!ReturnDesc)
+ {
+ Status = AE_NO_MEMORY;
+ goto Cleanup;
+ }
+
+ /* Get the Integer values from the objects */
+
+ Index = Operand[1]->Integer.Value;
+ Length = (ACPI_SIZE) Operand[2]->Integer.Value;
+
+ /*
+ * If the index is beyond the length of the String/Buffer, or if the
+ * requested length is zero, return a zero-length String/Buffer
+ */
+ if (Index >= Operand[0]->String.Length)
+ {
+ Length = 0;
+ }
+
+ /* Truncate request if larger than the actual String/Buffer */
+
+ else if ((Index + Length) > Operand[0]->String.Length)
+ {
+ Length = (ACPI_SIZE) Operand[0]->String.Length -
+ (ACPI_SIZE) Index;
+ }
+
+ /* Strings always have a sub-pointer, not so for buffers */
+
+ switch ((Operand[0])->Common.Type)
+ {
+ case ACPI_TYPE_STRING:
+
+ /* Always allocate a new buffer for the String */
+
+ Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
+ if (!Buffer)
+ {
+ Status = AE_NO_MEMORY;
+ goto Cleanup;
+ }
+ break;
+
+ case ACPI_TYPE_BUFFER:
+
+ /* If the requested length is zero, don't allocate a buffer */
+
+ if (Length > 0)
+ {
+ /* Allocate a new buffer for the Buffer */
+
+ Buffer = ACPI_ALLOCATE_ZEROED (Length);
+ if (!Buffer)
+ {
+ Status = AE_NO_MEMORY;
+ goto Cleanup;
+ }
+ }
+ break;
+
+ default: /* Should not happen */
+
+ Status = AE_AML_OPERAND_TYPE;
+ goto Cleanup;
+ }
+
+ if (Buffer)
+ {
+ /* We have a buffer, copy the portion requested */
+
+ ACPI_MEMCPY (Buffer, Operand[0]->String.Pointer + Index,
+ Length);
+ }
+
+ /* Set the length of the new String/Buffer */
+
+ ReturnDesc->String.Pointer = Buffer;
+ ReturnDesc->String.Length = (UINT32) Length;
+
+ /* Mark buffer initialized */
+
+ ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
+ break;
+
+
+ default:
+
+ ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
+ WalkState->Opcode));
+ Status = AE_AML_BAD_OPCODE;
+ goto Cleanup;
+ }
+
+ /* Store the result in the target */
+
+ Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
+
+Cleanup:
+
+ /* Delete return object on error */
+
+ if (ACPI_FAILURE (Status) || WalkState->ResultObj)
+ {
+ AcpiUtRemoveReference (ReturnDesc);
+ WalkState->ResultObj = NULL;
+ }
+
+ /* Set the return object and exit */
+
+ else
+ {
+ WalkState->ResultObj = ReturnDesc;
+ }
+ return_ACPI_STATUS (Status);
+}
+
+
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