1 /******************************************************************************
3 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
5 *****************************************************************************/
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44 #include <contrib/dev/acpica/include/acpi.h>
45 #include <contrib/dev/acpica/include/accommon.h>
46 #include <contrib/dev/acpica/include/acinterp.h>
47 #include <contrib/dev/acpica/include/acparser.h>
48 #include <contrib/dev/acpica/include/amlcode.h>
51 #define _COMPONENT ACPI_EXECUTER
52 ACPI_MODULE_NAME ("exoparg3")
56 * Naming convention for AML interpreter execution routines.
58 * The routines that begin execution of AML opcodes are named with a common
59 * convention based upon the number of arguments, the number of target operands,
60 * and whether or not a value is returned:
62 * AcpiExOpcode_xA_yT_zR
66 * xA - ARGUMENTS: The number of arguments (input operands) that are
67 * required for this opcode type (1 through 6 args).
68 * yT - TARGETS: The number of targets (output operands) that are required
69 * for this opcode type (0, 1, or 2 targets).
70 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
71 * as the function return (0 or 1).
73 * The AcpiExOpcode* functions are called via the Dispatcher component with
74 * fully resolved operands.
78 /*******************************************************************************
80 * FUNCTION: AcpiExOpcode_3A_0T_0R
82 * PARAMETERS: WalkState - Current walk state
86 * DESCRIPTION: Execute Triadic operator (3 operands)
88 ******************************************************************************/
91 AcpiExOpcode_3A_0T_0R (
92 ACPI_WALK_STATE *WalkState)
94 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
95 ACPI_SIGNAL_FATAL_INFO *Fatal;
96 ACPI_STATUS Status = AE_OK;
99 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
100 AcpiPsGetOpcodeName (WalkState->Opcode));
103 switch (WalkState->Opcode)
105 case AML_FATAL_OP: /* Fatal (FatalType FatalCode FatalArg) */
107 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
108 "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
109 (UINT32) Operand[0]->Integer.Value,
110 (UINT32) Operand[1]->Integer.Value,
111 (UINT32) Operand[2]->Integer.Value));
113 Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
116 Fatal->Type = (UINT32) Operand[0]->Integer.Value;
117 Fatal->Code = (UINT32) Operand[1]->Integer.Value;
118 Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
121 /* Always signal the OS! */
123 Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
125 /* Might return while OS is shutting down, just continue */
130 case AML_EXTERNAL_OP:
132 * If the interpreter sees this opcode, just ignore it. The External
133 * op is intended for use by disassemblers in order to properly
134 * disassemble control method invocations. The opcode or group of
135 * opcodes should be surrounded by an "if (0)" clause to ensure that
136 * AML interpreters never see the opcode.
143 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
145 Status = AE_AML_BAD_OPCODE;
152 return_ACPI_STATUS (Status);
156 /*******************************************************************************
158 * FUNCTION: AcpiExOpcode_3A_1T_1R
160 * PARAMETERS: WalkState - Current walk state
164 * DESCRIPTION: Execute Triadic operator (3 operands)
166 ******************************************************************************/
169 AcpiExOpcode_3A_1T_1R (
170 ACPI_WALK_STATE *WalkState)
172 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
173 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
175 ACPI_STATUS Status = AE_OK;
180 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
181 AcpiPsGetOpcodeName (WalkState->Opcode));
184 switch (WalkState->Opcode)
186 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
188 * Create the return object. The Source operand is guaranteed to be
189 * either a String or a Buffer, so just use its type.
191 ReturnDesc = AcpiUtCreateInternalObject (
192 (Operand[0])->Common.Type);
195 Status = AE_NO_MEMORY;
199 /* Get the Integer values from the objects */
201 Index = Operand[1]->Integer.Value;
202 Length = (ACPI_SIZE) Operand[2]->Integer.Value;
205 * If the index is beyond the length of the String/Buffer, or if the
206 * requested length is zero, return a zero-length String/Buffer
208 if (Index >= Operand[0]->String.Length)
213 /* Truncate request if larger than the actual String/Buffer */
215 else if ((Index + Length) > Operand[0]->String.Length)
217 Length = (ACPI_SIZE) Operand[0]->String.Length -
221 /* Strings always have a sub-pointer, not so for buffers */
223 switch ((Operand[0])->Common.Type)
225 case ACPI_TYPE_STRING:
227 /* Always allocate a new buffer for the String */
229 Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
232 Status = AE_NO_MEMORY;
237 case ACPI_TYPE_BUFFER:
239 /* If the requested length is zero, don't allocate a buffer */
243 /* Allocate a new buffer for the Buffer */
245 Buffer = ACPI_ALLOCATE_ZEROED (Length);
248 Status = AE_NO_MEMORY;
254 default: /* Should not happen */
256 Status = AE_AML_OPERAND_TYPE;
262 /* We have a buffer, copy the portion requested */
264 ACPI_MEMCPY (Buffer, Operand[0]->String.Pointer + Index,
268 /* Set the length of the new String/Buffer */
270 ReturnDesc->String.Pointer = Buffer;
271 ReturnDesc->String.Length = (UINT32) Length;
273 /* Mark buffer initialized */
275 ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
280 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
282 Status = AE_AML_BAD_OPCODE;
286 /* Store the result in the target */
288 Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
292 /* Delete return object on error */
294 if (ACPI_FAILURE (Status) || WalkState->ResultObj)
296 AcpiUtRemoveReference (ReturnDesc);
297 WalkState->ResultObj = NULL;
300 /* Set the return object and exit */
304 WalkState->ResultObj = ReturnDesc;
306 return_ACPI_STATUS (Status);