arch/all-pc/acpica/source/components/utilities/utpredef.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utpredef - support functions for predefined names
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, 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 #define __UTPREDEF_C__
  45
  46 #include "acpi.h"
  47 #include "accommon.h"
  48 #include "acpredef.h"
  49
  50
  51 #define _COMPONENT          ACPI_UTILITIES
  52         ACPI_MODULE_NAME    ("utpredef")
  53
  54
  55 /*
  56  * Names for the types that can be returned by the predefined objects.
  57  * Used for warning messages. Must be in the same order as the ACPI_RTYPEs
  58  */
  59 static const char   *UtRtypeNames[] =
  60 {
  61     "/Integer",
  62     "/String",
  63     "/Buffer",
  64     "/Package",
  65     "/Reference",
  66 };
  67
  68
  69 /*******************************************************************************
  70  *
  71  * FUNCTION:    AcpiUtGetNextPredefinedMethod
  72  *
  73  * PARAMETERS:  ThisName            - Entry in the predefined method/name table
  74  *
  75  * RETURN:      Pointer to next entry in predefined table.
  76  *
  77  * DESCRIPTION: Get the next entry in the predefine method table. Handles the
  78  *              cases where a package info entry follows a method name that
  79  *              returns a package.
  80  *
  81  ******************************************************************************/
  82
  83 const ACPI_PREDEFINED_INFO *
  84 AcpiUtGetNextPredefinedMethod (
  85     const ACPI_PREDEFINED_INFO  *ThisName)
  86 {
  87
  88     /*
  89      * Skip next entry in the table if this name returns a Package
  90      * (next entry contains the package info)
  91      */
  92     if ((ThisName->Info.ExpectedBtypes & ACPI_RTYPE_PACKAGE) &&
  93         (ThisName->Info.ExpectedBtypes != ACPI_RTYPE_ALL))
  94     {
  95         ThisName++;
  96     }
  97
  98     ThisName++;
  99     return (ThisName);
 100 }
 101
 102
 103 /*******************************************************************************
 104  *
 105  * FUNCTION:    AcpiUtMatchPredefinedMethod
 106  *
 107  * PARAMETERS:  Name                - Name to find
 108  *
 109  * RETURN:      Pointer to entry in predefined table. NULL indicates not found.
 110  *
 111  * DESCRIPTION: Check an object name against the predefined object list.
 112  *
 113  ******************************************************************************/
 114
 115 const ACPI_PREDEFINED_INFO *
 116 AcpiUtMatchPredefinedMethod (
 117     char                        *Name)
 118 {
 119     const ACPI_PREDEFINED_INFO  *ThisName;
 120
 121
 122     /* Quick check for a predefined name, first character must be underscore */
 123
 124     if (Name[0] != '_')
 125     {
 126         return (NULL);
 127     }
 128
 129     /* Search info table for a predefined method/object name */
 130
 131     ThisName = AcpiGbl_PredefinedMethods;
 132     while (ThisName->Info.Name[0])
 133     {
 134         if (ACPI_COMPARE_NAME (Name, ThisName->Info.Name))
 135         {
 136             return (ThisName);
 137         }
 138
 139         ThisName = AcpiUtGetNextPredefinedMethod (ThisName);
 140     }
 141
 142     return (NULL); /* Not found */
 143 }
 144
 145
 146 /*******************************************************************************
 147  *
 148  * FUNCTION:    AcpiUtGetExpectedReturnTypes
 149  *
 150  * PARAMETERS:  Buffer              - Where the formatted string is returned
 151  *              ExpectedBTypes      - Bitfield of expected data types
 152  *
 153  * RETURN:      Formatted string in Buffer.
 154  *
 155  * DESCRIPTION: Format the expected object types into a printable string.
 156  *
 157  ******************************************************************************/
 158
 159 void
 160 AcpiUtGetExpectedReturnTypes (
 161     char                    *Buffer,
 162     UINT32                  ExpectedBtypes)
 163 {
 164     UINT32                  ThisRtype;
 165     UINT32                  i;
 166     UINT32                  j;
 167
 168
 169     if (!ExpectedBtypes)
 170     {
 171         ACPI_STRCPY (Buffer, "NONE");
 172         return;
 173     }
 174
 175     j = 1;
 176     Buffer[0] = 0;
 177     ThisRtype = ACPI_RTYPE_INTEGER;
 178
 179     for (i = 0; i < ACPI_NUM_RTYPES; i++)
 180     {
 181         /* If one of the expected types, concatenate the name of this type */
 182
 183         if (ExpectedBtypes & ThisRtype)
 184         {
 185             ACPI_STRCAT (Buffer, &UtRtypeNames[i][j]);
 186             j = 0;              /* Use name separator from now on */
 187         }
 188
 189         ThisRtype <<= 1;    /* Next Rtype */
 190     }
 191 }
 192
 193
 194 /*******************************************************************************
 195  *
 196  * The remaining functions are used by iASL and AcpiHelp only
 197  *
 198  ******************************************************************************/
 199
 200 #if (defined ACPI_ASL_COMPILER || defined ACPI_HELP_APP)
 201 #include <stdio.h>
 202 #include <string.h>
 203
 204 /* Local prototypes */
 205
 206 static UINT32
 207 AcpiUtGetArgumentTypes (
 208     char                    *Buffer,
 209     UINT16                  ArgumentTypes);
 210
 211
 212 /* Types that can be returned externally by a predefined name */
 213
 214 static const char   *UtExternalTypeNames[] = /* Indexed by ACPI_TYPE_* */
 215 {
 216     ", UNSUPPORTED-TYPE",
 217     ", Integer",
 218     ", String",
 219     ", Buffer",
 220     ", Package"
 221 };
 222
 223 /* Bit widths for resource descriptor predefined names */
 224
 225 static const char   *UtResourceTypeNames[] =
 226 {
 227     "/1",
 228     "/2",
 229     "/3",
 230     "/8",
 231     "/16",
 232     "/32",
 233     "/64",
 234     "/variable",
 235 };
 236
 237
 238 /*******************************************************************************
 239  *
 240  * FUNCTION:    AcpiUtMatchResourceName
 241  *
 242  * PARAMETERS:  Name                - Name to find
 243  *
 244  * RETURN:      Pointer to entry in the resource table. NULL indicates not
 245  *              found.
 246  *
 247  * DESCRIPTION: Check an object name against the predefined resource
 248  *              descriptor object list.
 249  *
 250  ******************************************************************************/
 251
 252 const ACPI_PREDEFINED_INFO *
 253 AcpiUtMatchResourceName (
 254     char                        *Name)
 255 {
 256     const ACPI_PREDEFINED_INFO  *ThisName;
 257
 258
 259     /* Quick check for a predefined name, first character must be underscore */
 260
 261     if (Name[0] != '_')
 262     {
 263         return (NULL);
 264     }
 265
 266     /* Search info table for a predefined method/object name */
 267
 268     ThisName = AcpiGbl_ResourceNames;
 269     while (ThisName->Info.Name[0])
 270     {
 271         if (ACPI_COMPARE_NAME (Name, ThisName->Info.Name))
 272         {
 273             return (ThisName);
 274         }
 275
 276         ThisName++;
 277     }
 278
 279     return (NULL); /* Not found */
 280 }
 281
 282
 283 /*******************************************************************************
 284  *
 285  * FUNCTION:    AcpiUtDisplayPredefinedMethod
 286  *
 287  * PARAMETERS:  Buffer              - Scratch buffer for this function
 288  *              ThisName            - Entry in the predefined method/name table
 289  *              MultiLine           - TRUE if output should be on >1 line
 290  *
 291  * RETURN:      None
 292  *
 293  * DESCRIPTION: Display information about a predefined method. Number and
 294  *              type of the input arguments, and expected type(s) for the
 295  *              return value, if any.
 296  *
 297  ******************************************************************************/
 298
 299 void
 300 AcpiUtDisplayPredefinedMethod (
 301     char                        *Buffer,
 302     const ACPI_PREDEFINED_INFO  *ThisName,
 303     BOOLEAN                     MultiLine)
 304 {
 305     UINT32                      ArgCount;
 306
 307     /*
 308      * Get the argument count and the string buffer
 309      * containing all argument types
 310      */
 311     ArgCount = AcpiUtGetArgumentTypes (Buffer,
 312         ThisName->Info.ArgumentList);
 313
 314     if (MultiLine)
 315     {
 316         printf ("      ");
 317     }
 318
 319     printf ("%4.4s    Requires %s%u argument%s",
 320         ThisName->Info.Name,
 321         (ThisName->Info.ArgumentList & ARG_COUNT_IS_MINIMUM) ?
 322             "(at least) " : "",
 323         ArgCount, ArgCount != 1 ? "s" : "");
 324
 325     /* Display the types for any arguments */
 326
 327     if (ArgCount > 0)
 328     {
 329         printf (" (%s)", Buffer);
 330     }
 331
 332     if (MultiLine)
 333     {
 334         printf ("\n    ");
 335     }
 336
 337     /* Get the return value type(s) allowed */
 338
 339     if (ThisName->Info.ExpectedBtypes)
 340     {
 341         AcpiUtGetExpectedReturnTypes (Buffer, ThisName->Info.ExpectedBtypes);
 342         printf ("  Return value types: %s\n", Buffer);
 343     }
 344     else
 345     {
 346         printf ("  No return value\n");
 347     }
 348 }
 349
 350
 351 /*******************************************************************************
 352  *
 353  * FUNCTION:    AcpiUtGetArgumentTypes
 354  *
 355  * PARAMETERS:  Buffer              - Where to return the formatted types
 356  *              ArgumentTypes       - Types field for this method
 357  *
 358  * RETURN:      Count - the number of arguments required for this method
 359  *
 360  * DESCRIPTION: Format the required data types for this method (Integer,
 361  *              String, Buffer, or Package) and return the required argument
 362  *              count.
 363  *
 364  ******************************************************************************/
 365
 366 static UINT32
 367 AcpiUtGetArgumentTypes (
 368     char                    *Buffer,
 369     UINT16                  ArgumentTypes)
 370 {
 371     UINT16                  ThisArgumentType;
 372     UINT16                  SubIndex;
 373     UINT16                  ArgCount;
 374     UINT32                  i;
 375
 376
 377     *Buffer = 0;
 378     SubIndex = 2;
 379
 380     /* First field in the types list is the count of args to follow */
 381
 382     ArgCount = METHOD_GET_ARG_COUNT (ArgumentTypes);
 383     if (ArgCount > METHOD_PREDEF_ARGS_MAX)
 384     {
 385         printf ("**** Invalid argument count (%u) "
 386             "in predefined info structure\n", ArgCount);
 387         return (ArgCount);
 388     }
 389
 390     /* Get each argument from the list, convert to ascii, store to buffer */
 391
 392     for (i = 0; i < ArgCount; i++)
 393     {
 394         ThisArgumentType = METHOD_GET_NEXT_TYPE (ArgumentTypes);
 395
 396         if (!ThisArgumentType || (ThisArgumentType > METHOD_MAX_ARG_TYPE))
 397         {
 398             printf ("**** Invalid argument type (%u) "
 399                 "in predefined info structure\n", ThisArgumentType);
 400             return (ArgCount);
 401         }
 402
 403         strcat (Buffer, UtExternalTypeNames[ThisArgumentType] + SubIndex);
 404         SubIndex = 0;
 405     }
 406
 407     return (ArgCount);
 408 }
 409
 410
 411 /*******************************************************************************
 412  *
 413  * FUNCTION:    AcpiUtGetResourceBitWidth
 414  *
 415  * PARAMETERS:  Buffer              - Where the formatted string is returned
 416  *              Types               - Bitfield of expected data types
 417  *
 418  * RETURN:      Count of return types. Formatted string in Buffer.
 419  *
 420  * DESCRIPTION: Format the resource bit widths into a printable string.
 421  *
 422  ******************************************************************************/
 423
 424 UINT32
 425 AcpiUtGetResourceBitWidth (
 426     char                    *Buffer,
 427     UINT16                  Types)
 428 {
 429     UINT32                  i;
 430     UINT16                  SubIndex;
 431     UINT32                  Found;
 432
 433
 434     *Buffer = 0;
 435     SubIndex = 1;
 436     Found = 0;
 437
 438     for (i = 0; i < NUM_RESOURCE_WIDTHS; i++)
 439     {
 440         if (Types & 1)
 441         {
 442             strcat (Buffer, &(UtResourceTypeNames[i][SubIndex]));
 443             SubIndex = 0;
 444             Found++;
 445         }
 446
 447         Types >>= 1;
 448     }
 449
 450     return (Found);
 451 }
 452 #endif