1 /******************************************************************************
3 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2013, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
44 #define __EXOPARG3_C__
53 #define _COMPONENT ACPI_EXECUTER
54 ACPI_MODULE_NAME ("exoparg3")
58 * Naming convention for AML interpreter execution routines.
60 * The routines that begin execution of AML opcodes are named with a common
61 * convention based upon the number of arguments, the number of target operands,
62 * and whether or not a value is returned:
64 * AcpiExOpcode_xA_yT_zR
68 * xA - ARGUMENTS: The number of arguments (input operands) that are
69 * required for this opcode type (1 through 6 args).
70 * yT - TARGETS: The number of targets (output operands) that are required
71 * for this opcode type (0, 1, or 2 targets).
72 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
73 * as the function return (0 or 1).
75 * The AcpiExOpcode* functions are called via the Dispatcher component with
76 * fully resolved operands.
80 /*******************************************************************************
82 * FUNCTION: AcpiExOpcode_3A_0T_0R
84 * PARAMETERS: WalkState - Current walk state
88 * DESCRIPTION: Execute Triadic operator (3 operands)
90 ******************************************************************************/
93 AcpiExOpcode_3A_0T_0R (
94 ACPI_WALK_STATE *WalkState)
96 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
97 ACPI_SIGNAL_FATAL_INFO *Fatal;
98 ACPI_STATUS Status = AE_OK;
101 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
102 AcpiPsGetOpcodeName (WalkState->Opcode));
105 switch (WalkState->Opcode)
107 case AML_FATAL_OP: /* Fatal (FatalType FatalCode FatalArg) */
109 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
110 "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
111 (UINT32) Operand[0]->Integer.Value,
112 (UINT32) Operand[1]->Integer.Value,
113 (UINT32) Operand[2]->Integer.Value));
115 Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
118 Fatal->Type = (UINT32) Operand[0]->Integer.Value;
119 Fatal->Code = (UINT32) Operand[1]->Integer.Value;
120 Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
123 /* Always signal the OS! */
125 Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
127 /* Might return while OS is shutting down, just continue */
135 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
137 Status = AE_AML_BAD_OPCODE;
144 return_ACPI_STATUS (Status);
148 /*******************************************************************************
150 * FUNCTION: AcpiExOpcode_3A_1T_1R
152 * PARAMETERS: WalkState - Current walk state
156 * DESCRIPTION: Execute Triadic operator (3 operands)
158 ******************************************************************************/
161 AcpiExOpcode_3A_1T_1R (
162 ACPI_WALK_STATE *WalkState)
164 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
165 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
167 ACPI_STATUS Status = AE_OK;
172 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
173 AcpiPsGetOpcodeName (WalkState->Opcode));
176 switch (WalkState->Opcode)
178 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
181 * Create the return object. The Source operand is guaranteed to be
182 * either a String or a Buffer, so just use its type.
184 ReturnDesc = AcpiUtCreateInternalObject (
185 (Operand[0])->Common.Type);
188 Status = AE_NO_MEMORY;
192 /* Get the Integer values from the objects */
194 Index = Operand[1]->Integer.Value;
195 Length = (ACPI_SIZE) Operand[2]->Integer.Value;
198 * If the index is beyond the length of the String/Buffer, or if the
199 * requested length is zero, return a zero-length String/Buffer
201 if (Index >= Operand[0]->String.Length)
206 /* Truncate request if larger than the actual String/Buffer */
208 else if ((Index + Length) > Operand[0]->String.Length)
210 Length = (ACPI_SIZE) Operand[0]->String.Length -
214 /* Strings always have a sub-pointer, not so for buffers */
216 switch ((Operand[0])->Common.Type)
218 case ACPI_TYPE_STRING:
220 /* Always allocate a new buffer for the String */
222 Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
225 Status = AE_NO_MEMORY;
230 case ACPI_TYPE_BUFFER:
232 /* If the requested length is zero, don't allocate a buffer */
236 /* Allocate a new buffer for the Buffer */
238 Buffer = ACPI_ALLOCATE_ZEROED (Length);
241 Status = AE_NO_MEMORY;
247 default: /* Should not happen */
249 Status = AE_AML_OPERAND_TYPE;
255 /* We have a buffer, copy the portion requested */
257 ACPI_MEMCPY (Buffer, Operand[0]->String.Pointer + Index,
261 /* Set the length of the new String/Buffer */
263 ReturnDesc->String.Pointer = Buffer;
264 ReturnDesc->String.Length = (UINT32) Length;
266 /* Mark buffer initialized */
268 ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
274 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
276 Status = AE_AML_BAD_OPCODE;
280 /* Store the result in the target */
282 Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
286 /* Delete return object on error */
288 if (ACPI_FAILURE (Status) || WalkState->ResultObj)
290 AcpiUtRemoveReference (ReturnDesc);
291 WalkState->ResultObj = NULL;
294 /* Set the return object and exit */
298 WalkState->ResultObj = ReturnDesc;
300 return_ACPI_STATUS (Status);