usr/src/uts/intel/io/acpica/executer/exoparg3.c

   1 /******************************************************************************
   2  *
   3  * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  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.
  25  *
  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.
  29  *
  30  * NO WARRANTY
  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.
  42  */
  43
  44 #include "acpi.h"
  45 #include "accommon.h"
  46 #include "acinterp.h"
  47 #include "acparser.h"
  48 #include "amlcode.h"
  49
  50
  51 #define _COMPONENT          ACPI_EXECUTER
  52         ACPI_MODULE_NAME    ("exoparg3")
  53
  54
  55 /*!
  56  * Naming convention for AML interpreter execution routines.
  57  *
  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:
  61  *
  62  *      AcpiExOpcode_xA_yT_zR
  63  *
  64  * Where:
  65  *
  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).
  72  *
  73  * The AcpiExOpcode* functions are called via the Dispatcher component with
  74  * fully resolved operands.
  75 !*/
  76
  77
  78 /*******************************************************************************
  79  *
  80  * FUNCTION:    AcpiExOpcode_3A_0T_0R
  81  *
  82  * PARAMETERS:  WalkState           - Current walk state
  83  *
  84  * RETURN:      Status
  85  *
  86  * DESCRIPTION: Execute Triadic operator (3 operands)
  87  *
  88  ******************************************************************************/
  89
  90 ACPI_STATUS
  91 AcpiExOpcode_3A_0T_0R (
  92     ACPI_WALK_STATE         *WalkState)
  93 {
  94     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
  95     ACPI_SIGNAL_FATAL_INFO  *Fatal;
  96     ACPI_STATUS             Status = AE_OK;
  97
  98
  99     ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
 100         AcpiPsGetOpcodeName (WalkState->Opcode));
 101
 102
 103     switch (WalkState->Opcode)
 104     {
 105     case AML_FATAL_OP:          /* Fatal (FatalType  FatalCode  FatalArg) */
 106
 107         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 108             "FatalOp: Type %X Code %X Arg %X "
 109             "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
 110             (UINT32) Operand[0]->Integer.Value,
 111             (UINT32) Operand[1]->Integer.Value,
 112             (UINT32) Operand[2]->Integer.Value));
 113
 114         Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
 115         if (Fatal)
 116         {
 117             Fatal->Type = (UINT32) Operand[0]->Integer.Value;
 118             Fatal->Code = (UINT32) Operand[1]->Integer.Value;
 119             Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
 120         }
 121
 122         /* Always signal the OS! */
 123
 124         Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
 125
 126         /* Might return while OS is shutting down, just continue */
 127
 128         ACPI_FREE (Fatal);
 129         goto Cleanup;
 130
 131     case AML_EXTERNAL_OP:
 132         /*
 133          * If the interpreter sees this opcode, just ignore it. The External
 134          * op is intended for use by disassemblers in order to properly
 135          * disassemble control method invocations. The opcode or group of
 136          * opcodes should be surrounded by an "if (0)" clause to ensure that
 137          * AML interpreters never see the opcode. Thus, something is
 138          * wrong if an external opcode ever gets here.
 139          */
 140         ACPI_ERROR ((AE_INFO, "Executed External Op"));
 141         Status = AE_OK;
 142         goto Cleanup;
 143
 144     default:
 145
 146         ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
 147             WalkState->Opcode));
 148
 149         Status = AE_AML_BAD_OPCODE;
 150         goto Cleanup;
 151     }
 152
 153
 154 Cleanup:
 155
 156     return_ACPI_STATUS (Status);
 157 }
 158
 159
 160 /*******************************************************************************
 161  *
 162  * FUNCTION:    AcpiExOpcode_3A_1T_1R
 163  *
 164  * PARAMETERS:  WalkState           - Current walk state
 165  *
 166  * RETURN:      Status
 167  *
 168  * DESCRIPTION: Execute Triadic operator (3 operands)
 169  *
 170  ******************************************************************************/
 171
 172 ACPI_STATUS
 173 AcpiExOpcode_3A_1T_1R (
 174     ACPI_WALK_STATE         *WalkState)
 175 {
 176     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
 177     ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
 178     char                    *Buffer = NULL;
 179     ACPI_STATUS             Status = AE_OK;
 180     UINT64                  Index;
 181     ACPI_SIZE               Length;
 182
 183
 184     ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
 185         AcpiPsGetOpcodeName (WalkState->Opcode));
 186
 187
 188     switch (WalkState->Opcode)
 189     {
 190     case AML_MID_OP:    /* Mid (Source[0], Index[1], Length[2], Result[3]) */
 191         /*
 192          * Create the return object. The Source operand is guaranteed to be
 193          * either a String or a Buffer, so just use its type.
 194          */
 195         ReturnDesc = AcpiUtCreateInternalObject (
 196             (Operand[0])->Common.Type);
 197         if (!ReturnDesc)
 198         {
 199             Status = AE_NO_MEMORY;
 200             goto Cleanup;
 201         }
 202
 203         /* Get the Integer values from the objects */
 204
 205         Index = Operand[1]->Integer.Value;
 206         Length = (ACPI_SIZE) Operand[2]->Integer.Value;
 207
 208         /*
 209          * If the index is beyond the length of the String/Buffer, or if the
 210          * requested length is zero, return a zero-length String/Buffer
 211          */
 212         if (Index >= Operand[0]->String.Length)
 213         {
 214             Length = 0;
 215         }
 216
 217         /* Truncate request if larger than the actual String/Buffer */
 218
 219         else if ((Index + Length) > Operand[0]->String.Length)
 220         {
 221             Length =
 222                 (ACPI_SIZE) Operand[0]->String.Length - (ACPI_SIZE) Index;
 223         }
 224
 225         /* Strings always have a sub-pointer, not so for buffers */
 226
 227         switch ((Operand[0])->Common.Type)
 228         {
 229         case ACPI_TYPE_STRING:
 230
 231             /* Always allocate a new buffer for the String */
 232
 233             Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
 234             if (!Buffer)
 235             {
 236                 Status = AE_NO_MEMORY;
 237                 goto Cleanup;
 238             }
 239             break;
 240
 241         case ACPI_TYPE_BUFFER:
 242
 243             /* If the requested length is zero, don't allocate a buffer */
 244
 245             if (Length > 0)
 246             {
 247                 /* Allocate a new buffer for the Buffer */
 248
 249                 Buffer = ACPI_ALLOCATE_ZEROED (Length);
 250                 if (!Buffer)
 251                 {
 252                     Status = AE_NO_MEMORY;
 253                     goto Cleanup;
 254                 }
 255             }
 256             break;
 257
 258         default:                        /* Should not happen */
 259
 260             Status = AE_AML_OPERAND_TYPE;
 261             goto Cleanup;
 262         }
 263
 264         if (Buffer)
 265         {
 266             /* We have a buffer, copy the portion requested */
 267
 268             memcpy (Buffer,
 269                 Operand[0]->String.Pointer + Index, Length);
 270         }
 271
 272         /* Set the length of the new String/Buffer */
 273
 274         ReturnDesc->String.Pointer = Buffer;
 275         ReturnDesc->String.Length = (UINT32) Length;
 276
 277         /* Mark buffer initialized */
 278
 279         ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
 280         break;
 281
 282     default:
 283
 284         ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
 285             WalkState->Opcode));
 286
 287         Status = AE_AML_BAD_OPCODE;
 288         goto Cleanup;
 289     }
 290
 291     /* Store the result in the target */
 292
 293     Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
 294
 295 Cleanup:
 296
 297     /* Delete return object on error */
 298
 299     if (ACPI_FAILURE (Status) || WalkState->ResultObj)
 300     {
 301         AcpiUtRemoveReference (ReturnDesc);
 302         WalkState->ResultObj = NULL;
 303     }
 304     else
 305     {
 306         /* Set the return object and exit */
 307
 308         WalkState->ResultObj = ReturnDesc;
 309     }
 310
 311     return_ACPI_STATUS (Status);
 312 }