drivers/acpi/executer/exoparg3.c

   1
   2 /******************************************************************************
   3  *
   4  * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
   5  *
   6  *****************************************************************************/
   7
   8 /******************************************************************************
   9  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
  13  * All rights reserved.
  14  *
  15  * 2. License
  16  *
  17  * 2.1. This is your license from Intel Corp. under its intellectual property
  18  * rights.  You may have additional license terms from the party that provided
  19  * you this software, covering your right to use that party's intellectual
  20  * property rights.
  21  *
  22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  23  * copy of the source code appearing in this file ("Covered Code") an
  24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  25  * base code distributed originally by Intel ("Original Intel Code") to copy,
  26  * make derivatives, distribute, use and display any portion of the Covered
  27  * Code in any form, with the right to sublicense such rights; and
  28  *
  29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  30  * license (with the right to sublicense), under only those claims of Intel
  31  * patents that are infringed by the Original Intel Code, to make, use, sell,
  32  * offer to sell, and import the Covered Code and derivative works thereof
  33  * solely to the minimum extent necessary to exercise the above copyright
  34  * license, and in no event shall the patent license extend to any additions
  35  * to or modifications of the Original Intel Code.  No other license or right
  36  * is granted directly or by implication, estoppel or otherwise;
  37  *
  38  * The above copyright and patent license is granted only if the following
  39  * conditions are met:
  40  *
  41  * 3. Conditions
  42  *
  43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  44  * Redistribution of source code of any substantial portion of the Covered
  45  * Code or modification with rights to further distribute source must include
  46  * the above Copyright Notice, the above License, this list of Conditions,
  47  * and the following Disclaimer and Export Compliance provision.  In addition,
  48  * Licensee must cause all Covered Code to which Licensee contributes to
  49  * contain a file documenting the changes Licensee made to create that Covered
  50  * Code and the date of any change.  Licensee must include in that file the
  51  * documentation of any changes made by any predecessor Licensee.  Licensee
  52  * must include a prominent statement that the modification is derived,
  53  * directly or indirectly, from Original Intel Code.
  54  *
  55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  56  * Redistribution of source code of any substantial portion of the Covered
  57  * Code or modification without rights to further distribute source must
  58  * include the following Disclaimer and Export Compliance provision in the
  59  * documentation and/or other materials provided with distribution.  In
  60  * addition, Licensee may not authorize further sublicense of source of any
  61  * portion of the Covered Code, and must include terms to the effect that the
  62  * license from Licensee to its licensee is limited to the intellectual
  63  * property embodied in the software Licensee provides to its licensee, and
  64  * not to intellectual property embodied in modifications its licensee may
  65  * make.
  66  *
  67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  68  * substantial portion of the Covered Code or modification must reproduce the
  69  * above Copyright Notice, and the following Disclaimer and Export Compliance
  70  * provision in the documentation and/or other materials provided with the
  71  * distribution.
  72  *
  73  * 3.4. Intel retains all right, title, and interest in and to the Original
  74  * Intel Code.
  75  *
  76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  77  * Intel shall be used in advertising or otherwise to promote the sale, use or
  78  * other dealings in products derived from or relating to the Covered Code
  79  * without prior written authorization from Intel.
  80  *
  81  * 4. Disclaimer and Export Compliance
  82  *
  83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  84  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  86  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  87
  88  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  89  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  90  * PARTICULAR PURPOSE.
  91  *
  92  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  93  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  94  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  95  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  96  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  97  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  98  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  99  * LIMITED REMEDY.
 100  *
 101  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 102  * software or system incorporating such software without first obtaining any
 103  * required license or other approval from the U. S. Department of Commerce or
 104  * any other agency or department of the United States Government.  In the
 105  * event Licensee exports any such software from the United States or
 106  * re-exports any such software from a foreign destination, Licensee shall
 107  * ensure that the distribution and export/re-export of the software is in
 108  * compliance with all laws, regulations, orders, or other restrictions of the
 109  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 110  * any of its subsidiaries will export/re-export any technical data, process,
 111  * software, or service, directly or indirectly, to any country for which the
 112  * United States government or any agency thereof requires an export license,
 113  * other governmental approval, or letter of assurance, without first obtaining
 114  * such license, approval or letter.
 115  *
 116  *****************************************************************************/
 117
 118 #define __EXOPARG3_C__
 119
 120 #include "acpi.h"
 121 #include "accommon.h"
 122 #include "acinterp.h"
 123 #include "acparser.h"
 124 #include "amlcode.h"
 125
 126
 127 #define _COMPONENT          ACPI_EXECUTER
 128         ACPI_MODULE_NAME    ("exoparg3")
 129
 130
 131 /*!
 132  * Naming convention for AML interpreter execution routines.
 133  *
 134  * The routines that begin execution of AML opcodes are named with a common
 135  * convention based upon the number of arguments, the number of target operands,
 136  * and whether or not a value is returned:
 137  *
 138  *      AcpiExOpcode_xA_yT_zR
 139  *
 140  * Where:
 141  *
 142  * xA - ARGUMENTS:    The number of arguments (input operands) that are
 143  *                    required for this opcode type (1 through 6 args).
 144  * yT - TARGETS:      The number of targets (output operands) that are required
 145  *                    for this opcode type (0, 1, or 2 targets).
 146  * zR - RETURN VALUE: Indicates whether this opcode type returns a value
 147  *                    as the function return (0 or 1).
 148  *
 149  * The AcpiExOpcode* functions are called via the Dispatcher component with
 150  * fully resolved operands.
 151 !*/
 152
 153
 154 /*******************************************************************************
 155  *
 156  * FUNCTION:    AcpiExOpcode_3A_0T_0R
 157  *
 158  * PARAMETERS:  WalkState           - Current walk state
 159  *
 160  * RETURN:      Status
 161  *
 162  * DESCRIPTION: Execute Triadic operator (3 operands)
 163  *
 164  ******************************************************************************/
 165
 166 ACPI_STATUS
 167 AcpiExOpcode_3A_0T_0R (
 168     ACPI_WALK_STATE         *WalkState)
 169 {
 170     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
 171     ACPI_SIGNAL_FATAL_INFO  *Fatal;
 172     ACPI_STATUS             Status = AE_OK;
 173
 174
 175     ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
 176         AcpiPsGetOpcodeName (WalkState->Opcode));
 177
 178
 179     switch (WalkState->Opcode)
 180     {
 181     case AML_FATAL_OP:          /* Fatal (FatalType  FatalCode  FatalArg) */
 182
 183         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 184             "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
 185             (UINT32) Operand[0]->Integer.Value,
 186             (UINT32) Operand[1]->Integer.Value,
 187             (UINT32) Operand[2]->Integer.Value));
 188
 189         Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
 190         if (Fatal)
 191         {
 192             Fatal->Type     = (UINT32) Operand[0]->Integer.Value;
 193             Fatal->Code     = (UINT32) Operand[1]->Integer.Value;
 194             Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
 195         }
 196
 197         /* Always signal the OS! */
 198
 199         Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
 200
 201         /* Might return while OS is shutting down, just continue */
 202
 203         ACPI_FREE (Fatal);
 204         break;
 205
 206
 207     default:
 208
 209         ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
 210             WalkState->Opcode));
 211         Status = AE_AML_BAD_OPCODE;
 212         goto Cleanup;
 213     }
 214
 215
 216 Cleanup:
 217
 218     return_ACPI_STATUS (Status);
 219 }
 220
 221
 222 /*******************************************************************************
 223  *
 224  * FUNCTION:    AcpiExOpcode_3A_1T_1R
 225  *
 226  * PARAMETERS:  WalkState           - Current walk state
 227  *
 228  * RETURN:      Status
 229  *
 230  * DESCRIPTION: Execute Triadic operator (3 operands)
 231  *
 232  ******************************************************************************/
 233
 234 ACPI_STATUS
 235 AcpiExOpcode_3A_1T_1R (
 236     ACPI_WALK_STATE         *WalkState)
 237 {
 238     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
 239     ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
 240     char                    *Buffer = NULL;
 241     ACPI_STATUS             Status = AE_OK;
 242     UINT64                  Index;
 243     ACPI_SIZE               Length;
 244
 245
 246     ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
 247         AcpiPsGetOpcodeName (WalkState->Opcode));
 248
 249
 250     switch (WalkState->Opcode)
 251     {
 252     case AML_MID_OP:    /* Mid (Source[0], Index[1], Length[2], Result[3]) */
 253
 254         /*
 255          * Create the return object.  The Source operand is guaranteed to be
 256          * either a String or a Buffer, so just use its type.
 257          */
 258         ReturnDesc = AcpiUtCreateInternalObject (
 259                         (Operand[0])->Common.Type);
 260         if (!ReturnDesc)
 261         {
 262             Status = AE_NO_MEMORY;
 263             goto Cleanup;
 264         }
 265
 266         /* Get the Integer values from the objects */
 267
 268         Index = Operand[1]->Integer.Value;
 269         Length = (ACPI_SIZE) Operand[2]->Integer.Value;
 270
 271         /*
 272          * If the index is beyond the length of the String/Buffer, or if the
 273          * requested length is zero, return a zero-length String/Buffer
 274          */
 275         if (Index >= Operand[0]->String.Length)
 276         {
 277             Length = 0;
 278         }
 279
 280         /* Truncate request if larger than the actual String/Buffer */
 281
 282         else if ((Index + Length) > Operand[0]->String.Length)
 283         {
 284             Length = (ACPI_SIZE) Operand[0]->String.Length -
 285                         (ACPI_SIZE) Index;
 286         }
 287
 288         /* Strings always have a sub-pointer, not so for buffers */
 289
 290         switch ((Operand[0])->Common.Type)
 291         {
 292         case ACPI_TYPE_STRING:
 293
 294             /* Always allocate a new buffer for the String */
 295
 296             Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
 297             if (!Buffer)
 298             {
 299                 Status = AE_NO_MEMORY;
 300                 goto Cleanup;
 301             }
 302             break;
 303
 304         case ACPI_TYPE_BUFFER:
 305
 306             /* If the requested length is zero, don't allocate a buffer */
 307
 308             if (Length > 0)
 309             {
 310                 /* Allocate a new buffer for the Buffer */
 311
 312                 Buffer = ACPI_ALLOCATE_ZEROED (Length);
 313                 if (!Buffer)
 314                 {
 315                     Status = AE_NO_MEMORY;
 316                     goto Cleanup;
 317                 }
 318             }
 319             break;
 320
 321         default:                        /* Should not happen */
 322
 323             Status = AE_AML_OPERAND_TYPE;
 324             goto Cleanup;
 325         }
 326
 327         if (Buffer)
 328         {
 329             /* We have a buffer, copy the portion requested */
 330
 331             ACPI_MEMCPY (Buffer, Operand[0]->String.Pointer + Index,
 332                          Length);
 333         }
 334
 335         /* Set the length of the new String/Buffer */
 336
 337         ReturnDesc->String.Pointer = Buffer;
 338         ReturnDesc->String.Length = (UINT32) Length;
 339
 340         /* Mark buffer initialized */
 341
 342         ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
 343         break;
 344
 345
 346     default:
 347
 348         ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
 349             WalkState->Opcode));
 350         Status = AE_AML_BAD_OPCODE;
 351         goto Cleanup;
 352     }
 353
 354     /* Store the result in the target */
 355
 356     Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
 357
 358 Cleanup:
 359
 360     /* Delete return object on error */
 361
 362     if (ACPI_FAILURE (Status) || WalkState->ResultObj)
 363     {
 364         AcpiUtRemoveReference (ReturnDesc);
 365         WalkState->ResultObj = NULL;
 366     }
 367
 368     /* Set the return object and exit */
 369
 370     else
 371     {
 372         WalkState->ResultObj = ReturnDesc;
 373     }
 374     return_ACPI_STATUS (Status);
 375 }
 376
 377