reactos/drivers/bus/acpi/acpica/executer/exoparg6.c

   1
   2 /******************************************************************************
   3  *
   4  * Module Name: exoparg6 - AML execution - opcodes with 6 arguments
   5  *
   6  *****************************************************************************/
   7
   8 /******************************************************************************
   9  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2009, 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 __EXOPARG6_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    ("exoparg6")
 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 /* Local prototypes */
 154
 155 static BOOLEAN
 156 AcpiExDoMatch (
 157     UINT32                  MatchOp,
 158     ACPI_OPERAND_OBJECT     *PackageObj,
 159     ACPI_OPERAND_OBJECT     *MatchObj);
 160
 161
 162 /*******************************************************************************
 163  *
 164  * FUNCTION:    AcpiExDoMatch
 165  *
 166  * PARAMETERS:  MatchOp         - The AML match operand
 167  *              PackageObj      - Object from the target package
 168  *              MatchObj        - Object to be matched
 169  *
 170  * RETURN:      TRUE if the match is successful, FALSE otherwise
 171  *
 172  * DESCRIPTION: Implements the low-level match for the ASL Match operator.
 173  *              Package elements will be implicitly converted to the type of
 174  *              the match object (Integer/Buffer/String).
 175  *
 176  ******************************************************************************/
 177
 178 static BOOLEAN
 179 AcpiExDoMatch (
 180     UINT32                  MatchOp,
 181     ACPI_OPERAND_OBJECT     *PackageObj,
 182     ACPI_OPERAND_OBJECT     *MatchObj)
 183 {
 184     BOOLEAN                 LogicalResult = TRUE;
 185     ACPI_STATUS             Status;
 186
 187
 188     /*
 189      * Note: Since the PackageObj/MatchObj ordering is opposite to that of
 190      * the standard logical operators, we have to reverse them when we call
 191      * DoLogicalOp in order to make the implicit conversion rules work
 192      * correctly. However, this means we have to flip the entire equation
 193      * also. A bit ugly perhaps, but overall, better than fussing the
 194      * parameters around at runtime, over and over again.
 195      *
 196      * Below, P[i] refers to the package element, M refers to the Match object.
 197      */
 198     switch (MatchOp)
 199     {
 200     case MATCH_MTR:
 201
 202         /* Always true */
 203
 204         break;
 205
 206     case MATCH_MEQ:
 207
 208         /*
 209          * True if equal: (P[i] == M)
 210          * Change to:     (M == P[i])
 211          */
 212         Status = AcpiExDoLogicalOp (AML_LEQUAL_OP, MatchObj, PackageObj,
 213                     &LogicalResult);
 214         if (ACPI_FAILURE (Status))
 215         {
 216             return (FALSE);
 217         }
 218         break;
 219
 220     case MATCH_MLE:
 221
 222         /*
 223          * True if less than or equal: (P[i] <= M) (P[i] NotGreater than M)
 224          * Change to:                  (M >= P[i]) (M NotLess than P[i])
 225          */
 226         Status = AcpiExDoLogicalOp (AML_LLESS_OP, MatchObj, PackageObj,
 227                     &LogicalResult);
 228         if (ACPI_FAILURE (Status))
 229         {
 230             return (FALSE);
 231         }
 232         LogicalResult = (BOOLEAN) !LogicalResult;
 233         break;
 234
 235     case MATCH_MLT:
 236
 237         /*
 238          * True if less than: (P[i] < M)
 239          * Change to:         (M > P[i])
 240          */
 241         Status = AcpiExDoLogicalOp (AML_LGREATER_OP, MatchObj, PackageObj,
 242                     &LogicalResult);
 243         if (ACPI_FAILURE (Status))
 244         {
 245             return (FALSE);
 246         }
 247         break;
 248
 249     case MATCH_MGE:
 250
 251         /*
 252          * True if greater than or equal: (P[i] >= M) (P[i] NotLess than M)
 253          * Change to:                     (M <= P[i]) (M NotGreater than P[i])
 254          */
 255         Status = AcpiExDoLogicalOp (AML_LGREATER_OP, MatchObj, PackageObj,
 256                     &LogicalResult);
 257         if (ACPI_FAILURE (Status))
 258         {
 259             return (FALSE);
 260         }
 261         LogicalResult = (BOOLEAN)!LogicalResult;
 262         break;
 263
 264     case MATCH_MGT:
 265
 266         /*
 267          * True if greater than: (P[i] > M)
 268          * Change to:            (M < P[i])
 269          */
 270         Status = AcpiExDoLogicalOp (AML_LLESS_OP, MatchObj, PackageObj,
 271                     &LogicalResult);
 272         if (ACPI_FAILURE (Status))
 273         {
 274             return (FALSE);
 275         }
 276         break;
 277
 278     default:
 279
 280         /* Undefined */
 281
 282         return (FALSE);
 283     }
 284
 285     return LogicalResult;
 286 }
 287
 288
 289 /*******************************************************************************
 290  *
 291  * FUNCTION:    AcpiExOpcode_6A_0T_1R
 292  *
 293  * PARAMETERS:  WalkState           - Current walk state
 294  *
 295  * RETURN:      Status
 296  *
 297  * DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value
 298  *
 299  ******************************************************************************/
 300
 301 ACPI_STATUS
 302 AcpiExOpcode_6A_0T_1R (
 303     ACPI_WALK_STATE         *WalkState)
 304 {
 305     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
 306     ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
 307     ACPI_STATUS             Status = AE_OK;
 308     ACPI_INTEGER            Index;
 309     ACPI_OPERAND_OBJECT     *ThisElement;
 310
 311
 312     ACPI_FUNCTION_TRACE_STR (ExOpcode_6A_0T_1R,
 313         AcpiPsGetOpcodeName (WalkState->Opcode));
 314
 315
 316     switch (WalkState->Opcode)
 317     {
 318     case AML_MATCH_OP:
 319         /*
 320          * Match (SearchPkg[0], MatchOp1[1], MatchObj1[2],
 321          *                      MatchOp2[3], MatchObj2[4], StartIndex[5])
 322          */
 323
 324         /* Validate both Match Term Operators (MTR, MEQ, etc.) */
 325
 326         if ((Operand[1]->Integer.Value > MAX_MATCH_OPERATOR) ||
 327             (Operand[3]->Integer.Value > MAX_MATCH_OPERATOR))
 328         {
 329             ACPI_ERROR ((AE_INFO, "Match operator out of range"));
 330             Status = AE_AML_OPERAND_VALUE;
 331             goto Cleanup;
 332         }
 333
 334         /* Get the package StartIndex, validate against the package length */
 335
 336         Index = Operand[5]->Integer.Value;
 337         if (Index >= Operand[0]->Package.Count)
 338         {
 339             ACPI_ERROR ((AE_INFO,
 340                 "Index (%X%8.8X) beyond package end (%X)",
 341                 ACPI_FORMAT_UINT64 (Index), Operand[0]->Package.Count));
 342             Status = AE_AML_PACKAGE_LIMIT;
 343             goto Cleanup;
 344         }
 345
 346         /* Create an integer for the return value */
 347         /* Default return value is ACPI_INTEGER_MAX if no match found */
 348
 349         ReturnDesc = AcpiUtCreateIntegerObject (ACPI_INTEGER_MAX);
 350         if (!ReturnDesc)
 351         {
 352             Status = AE_NO_MEMORY;
 353             goto Cleanup;
 354
 355         }
 356
 357         /*
 358          * Examine each element until a match is found. Both match conditions
 359          * must be satisfied for a match to occur. Within the loop,
 360          * "continue" signifies that the current element does not match
 361          * and the next should be examined.
 362          *
 363          * Upon finding a match, the loop will terminate via "break" at
 364          * the bottom.  If it terminates "normally", MatchValue will be
 365          * ACPI_INTEGER_MAX (Ones) (its initial value) indicating that no
 366          * match was found.
 367          */
 368         for ( ; Index < Operand[0]->Package.Count; Index++)
 369         {
 370             /* Get the current package element */
 371
 372             ThisElement = Operand[0]->Package.Elements[Index];
 373
 374             /* Treat any uninitialized (NULL) elements as non-matching */
 375
 376             if (!ThisElement)
 377             {
 378                 continue;
 379             }
 380
 381             /*
 382              * Both match conditions must be satisfied. Execution of a continue
 383              * (proceed to next iteration of enclosing for loop) signifies a
 384              * non-match.
 385              */
 386             if (!AcpiExDoMatch ((UINT32) Operand[1]->Integer.Value,
 387                                 ThisElement, Operand[2]))
 388             {
 389                 continue;
 390             }
 391
 392             if (!AcpiExDoMatch ((UINT32) Operand[3]->Integer.Value,
 393                                 ThisElement, Operand[4]))
 394             {
 395                 continue;
 396             }
 397
 398             /* Match found: Index is the return value */
 399
 400             ReturnDesc->Integer.Value = Index;
 401             break;
 402         }
 403         break;
 404
 405
 406     case AML_LOAD_TABLE_OP:
 407
 408         Status = AcpiExLoadTableOp (WalkState, &ReturnDesc);
 409         break;
 410
 411
 412     default:
 413
 414         ACPI_ERROR ((AE_INFO, "Unknown AML opcode %X",
 415             WalkState->Opcode));
 416         Status = AE_AML_BAD_OPCODE;
 417         goto Cleanup;
 418     }
 419
 420
 421 Cleanup:
 422
 423     /* Delete return object on error */
 424
 425     if (ACPI_FAILURE (Status))
 426     {
 427         AcpiUtRemoveReference (ReturnDesc);
 428     }
 429
 430     /* Save return object on success */
 431
 432     else
 433     {
 434         WalkState->ResultObj = ReturnDesc;
 435     }
 436
 437     return_ACPI_STATUS (Status);
 438 }