1 /******************************************************************************
   2  *
   3  * Module Name: dtfield.c - Code generation for individual source fields
   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 __DTFIELD_C__
  45 
  46 #include "aslcompiler.h"
  47 #include "dtcompiler.h"
  48 
  49 #define _COMPONENT          DT_COMPILER
  50         ACPI_MODULE_NAME    ("dtfield")
  51 
  52 
  53 /* Local prototypes */
  54 
  55 static void
  56 DtCompileString (
  57     UINT8                   *Buffer,
  58     DT_FIELD                *Field,
  59     UINT32                  ByteLength);
  60 
  61 static void
  62 DtCompileUnicode (
  63     UINT8                   *Buffer,
  64     DT_FIELD                *Field,
  65     UINT32                  ByteLength);
  66 
  67 static ACPI_STATUS
  68 DtCompileUuid (
  69     UINT8                   *Buffer,
  70     DT_FIELD                *Field,
  71     UINT32                  ByteLength);
  72 
  73 static char *
  74 DtNormalizeBuffer (
  75     char                    *Buffer,
  76     UINT32                  *Count);
  77 
  78 
  79 /******************************************************************************
  80  *
  81  * FUNCTION:    DtCompileOneField
  82  *
  83  * PARAMETERS:  Buffer              - Output buffer
  84  *              Field               - Field to be compiled
  85  *              ByteLength          - Byte length of the field
  86  *              Type                - Field type
  87  *
  88  * RETURN:      None
  89  *
  90  * DESCRIPTION: Compile a field value to binary
  91  *
  92  *****************************************************************************/
  93 
  94 void
  95 DtCompileOneField (
  96     UINT8                   *Buffer,
  97     DT_FIELD                *Field,
  98     UINT32                  ByteLength,
  99     UINT8                   Type,
 100     UINT8                   Flags)
 101 {
 102     ACPI_STATUS             Status;
 103 
 104     switch (Type)
 105     {
 106     case DT_FIELD_TYPE_INTEGER:
 107 
 108         DtCompileInteger (Buffer, Field, ByteLength, Flags);
 109         break;
 110 
 111     case DT_FIELD_TYPE_STRING:
 112 
 113         DtCompileString (Buffer, Field, ByteLength);
 114         break;
 115 
 116     case DT_FIELD_TYPE_UUID:
 117 
 118         Status = DtCompileUuid (Buffer, Field, ByteLength);
 119         if (ACPI_SUCCESS (Status))
 120         {
 121             break;
 122         }
 123 
 124         /* Fall through. */
 125 
 126     case DT_FIELD_TYPE_BUFFER:
 127 
 128         DtCompileBuffer (Buffer, Field->Value, Field, ByteLength);
 129         break;
 130 
 131     case DT_FIELD_TYPE_UNICODE:
 132 
 133         DtCompileUnicode (Buffer, Field, ByteLength);
 134         break;
 135 
 136     case DT_FIELD_TYPE_DEVICE_PATH:
 137 
 138         break;
 139 
 140     default:
 141 
 142         DtFatal (ASL_MSG_COMPILER_INTERNAL, Field, "Invalid field type");
 143         break;
 144     }
 145 }
 146 
 147 
 148 /******************************************************************************
 149  *
 150  * FUNCTION:    DtCompileString
 151  *
 152  * PARAMETERS:  Buffer              - Output buffer
 153  *              Field               - String to be copied to buffer
 154  *              ByteLength          - Maximum length of string
 155  *
 156  * RETURN:      None
 157  *
 158  * DESCRIPTION: Copy string to the buffer
 159  *
 160  *****************************************************************************/
 161 
 162 static void
 163 DtCompileString (
 164     UINT8                   *Buffer,
 165     DT_FIELD                *Field,
 166     UINT32                  ByteLength)
 167 {
 168     UINT32                  Length;
 169 
 170 
 171     Length = ACPI_STRLEN (Field->Value);
 172 
 173     /* Check if the string is too long for the field */
 174 
 175     if (Length > ByteLength)
 176     {
 177         sprintf (MsgBuffer, "Maximum %u characters", ByteLength);
 178         DtError (ASL_ERROR, ASL_MSG_STRING_LENGTH, Field, MsgBuffer);
 179         Length = ByteLength;
 180     }
 181 
 182     ACPI_MEMCPY (Buffer, Field->Value, Length);
 183 }
 184 
 185 
 186 /******************************************************************************
 187  *
 188  * FUNCTION:    DtCompileUnicode
 189  *
 190  * PARAMETERS:  Buffer              - Output buffer
 191  *              Field               - String to be copied to buffer
 192  *              ByteLength          - Maximum length of string
 193  *
 194  * RETURN:      None
 195  *
 196  * DESCRIPTION: Convert ASCII string to Unicode string
 197  *
 198  * Note:  The Unicode string is 16 bits per character, no leading signature,
 199  *        with a 16-bit terminating NULL.
 200  *
 201  *****************************************************************************/
 202 
 203 static void
 204 DtCompileUnicode (
 205     UINT8                   *Buffer,
 206     DT_FIELD                *Field,
 207     UINT32                  ByteLength)
 208 {
 209     UINT32                  Count;
 210     UINT32                  i;
 211     char                    *AsciiString;
 212     UINT16                  *UnicodeString;
 213 
 214 
 215     AsciiString = Field->Value;
 216     UnicodeString = (UINT16 *) Buffer;
 217     Count = ACPI_STRLEN (AsciiString) + 1;
 218 
 219     /* Convert to Unicode string (including null terminator) */
 220 
 221     for (i = 0; i < Count; i++)
 222     {
 223         UnicodeString[i] = (UINT16) AsciiString[i];
 224     }
 225 }
 226 
 227 
 228 /*******************************************************************************
 229  *
 230  * FUNCTION:    DtCompileUuid
 231  *
 232  * PARAMETERS:  Buffer              - Output buffer
 233  *              Field               - String to be copied to buffer
 234  *              ByteLength          - Maximum length of string
 235  *
 236  * RETURN:      None
 237  *
 238  * DESCRIPTION: Convert UUID string to 16-byte buffer
 239  *
 240  ******************************************************************************/
 241 
 242 static ACPI_STATUS
 243 DtCompileUuid (
 244     UINT8                   *Buffer,
 245     DT_FIELD                *Field,
 246     UINT32                  ByteLength)
 247 {
 248     char                    *InString;
 249     ACPI_STATUS             Status;
 250 
 251 
 252     InString = Field->Value;
 253 
 254     Status = AuValidateUuid (InString);
 255     if (ACPI_FAILURE (Status))
 256     {
 257         sprintf (MsgBuffer, "%s", Field->Value);
 258         DtNameError (ASL_ERROR, ASL_MSG_INVALID_UUID, Field, MsgBuffer);
 259     }
 260     else
 261     {
 262         Status = AuConvertStringToUuid (InString, (char *) Buffer);
 263     }
 264 
 265     return (Status);
 266 }
 267 
 268 
 269 /******************************************************************************
 270  *
 271  * FUNCTION:    DtCompileInteger
 272  *
 273  * PARAMETERS:  Buffer              - Output buffer
 274  *              Field               - Field obj with Integer to be compiled
 275  *              ByteLength          - Byte length of the integer
 276  *              Flags               - Additional compile info
 277  *
 278  * RETURN:      None
 279  *
 280  * DESCRIPTION: Compile an integer. Supports integer expressions with C-style
 281  *              operators.
 282  *
 283  *****************************************************************************/
 284 
 285 void
 286 DtCompileInteger (
 287     UINT8                   *Buffer,
 288     DT_FIELD                *Field,
 289     UINT32                  ByteLength,
 290     UINT8                   Flags)
 291 {
 292     UINT64                  Value;
 293     UINT64                  MaxValue;
 294     ACPI_STATUS             Status;
 295 
 296 
 297     /* Output buffer byte length must be in range 1-8 */
 298 
 299     if ((ByteLength > 8) || (ByteLength == 0))
 300     {
 301         DtFatal (ASL_MSG_COMPILER_INTERNAL, Field,
 302             "Invalid internal Byte length");
 303         return;
 304     }
 305 
 306     /* Resolve integer expression to a single integer value */
 307 
 308     Status = DtResolveIntegerExpression (Field, &Value);
 309     if (ACPI_FAILURE (Status))
 310     {
 311         return;
 312     }
 313 
 314     /* Ensure that reserved fields are set to zero */
 315     /* TBD: should we set to zero, or just make this an ERROR? */
 316     /* TBD: Probably better to use a flag */
 317 
 318     if (!ACPI_STRCMP (Field->Name, "Reserved") &&
 319         (Value != 0))
 320     {
 321         DtError (ASL_WARNING, ASL_MSG_RESERVED_VALUE, Field,
 322             "Setting to zero");
 323         Value = 0;
 324     }
 325 
 326     /* Check if the value must be non-zero */
 327 
 328     if ((Value == 0) && (Flags & DT_NON_ZERO))
 329     {
 330         DtError (ASL_ERROR, ASL_MSG_ZERO_VALUE, Field, NULL);
 331     }
 332 
 333     /*
 334      * Generate the maximum value for the data type (ByteLength)
 335      * Note: construct chosen for maximum portability
 336      */
 337     MaxValue = ((UINT64) (-1)) >> (64 - (ByteLength * 8));
 338 
 339     /* Validate that the input value is within range of the target */
 340 
 341     if (Value > MaxValue)
 342     {
 343         sprintf (MsgBuffer, "%8.8X%8.8X - max %u bytes",
 344             ACPI_FORMAT_UINT64 (Value), ByteLength);
 345         DtError (ASL_ERROR, ASL_MSG_INTEGER_SIZE, Field, MsgBuffer);
 346     }
 347 
 348     ACPI_MEMCPY (Buffer, &Value, ByteLength);
 349     return;
 350 }
 351 
 352 
 353 /******************************************************************************
 354  *
 355  * FUNCTION:    DtNormalizeBuffer
 356  *
 357  * PARAMETERS:  Buffer              - Input buffer
 358  *              Count               - Output the count of hex number in
 359  *                                    the Buffer
 360  *
 361  * RETURN:      The normalized buffer, freed by caller
 362  *
 363  * DESCRIPTION: [1A,2B,3C,4D] or 1A, 2B, 3C, 4D will be normalized
 364  *              to 1A 2B 3C 4D
 365  *
 366  *****************************************************************************/
 367 
 368 static char *
 369 DtNormalizeBuffer (
 370     char                    *Buffer,
 371     UINT32                  *Count)
 372 {
 373     char                    *NewBuffer;
 374     char                    *TmpBuffer;
 375     UINT32                  BufferCount = 0;
 376     BOOLEAN                 Separator = TRUE;
 377     char                    c;
 378 
 379 
 380     NewBuffer = UtLocalCalloc (ACPI_STRLEN (Buffer) + 1);
 381     TmpBuffer = NewBuffer;
 382 
 383     while ((c = *Buffer++))
 384     {
 385         switch (c)
 386         {
 387         /* Valid separators */
 388 
 389         case '[':
 390         case ']':
 391         case ' ':
 392         case ',':
 393 
 394             Separator = TRUE;
 395             break;
 396 
 397         default:
 398 
 399             if (Separator)
 400             {
 401                 /* Insert blank as the standard separator */
 402 
 403                 if (NewBuffer[0])
 404                 {
 405                     *TmpBuffer++ = ' ';
 406                     BufferCount++;
 407                 }
 408 
 409                 Separator = FALSE;
 410             }
 411 
 412             *TmpBuffer++ = c;
 413             break;
 414         }
 415     }
 416 
 417     *Count = BufferCount + 1;
 418     return (NewBuffer);
 419 }
 420 
 421 
 422 /******************************************************************************
 423  *
 424  * FUNCTION:    DtCompileBuffer
 425  *
 426  * PARAMETERS:  Buffer              - Output buffer
 427  *              StringValue         - Integer list to be compiled
 428  *              Field               - Current field object
 429  *              ByteLength          - Byte length of the integer list
 430  *
 431  * RETURN:      Count of remaining data in the input list
 432  *
 433  * DESCRIPTION: Compile and pack an integer list, for example
 434  *              "AA 1F 20 3B" ==> Buffer[] = {0xAA,0x1F,0x20,0x3B}
 435  *
 436  *****************************************************************************/
 437 
 438 UINT32
 439 DtCompileBuffer (
 440     UINT8                   *Buffer,
 441     char                    *StringValue,
 442     DT_FIELD                *Field,
 443     UINT32                  ByteLength)
 444 {
 445     ACPI_STATUS             Status;
 446     char                    Hex[3];
 447     UINT64                  Value;
 448     UINT32                  i;
 449     UINT32                  Count;
 450 
 451 
 452     /* Allow several different types of value separators */
 453 
 454     StringValue = DtNormalizeBuffer (StringValue, &Count);
 455 
 456     Hex[2] = 0;
 457     for (i = 0; i < Count; i++)
 458     {
 459         /* Each element of StringValue is three chars */
 460 
 461         Hex[0] = StringValue[(3 * i)];
 462         Hex[1] = StringValue[(3 * i) + 1];
 463 
 464         /* Convert one hex byte */
 465 
 466         Value = 0;
 467         Status = DtStrtoul64 (Hex, &Value);
 468         if (ACPI_FAILURE (Status))
 469         {
 470             DtError (ASL_ERROR, ASL_MSG_BUFFER_ELEMENT, Field, MsgBuffer);
 471             goto Exit;
 472         }
 473 
 474         Buffer[i] = (UINT8) Value;
 475     }
 476 
 477 Exit:
 478     ACPI_FREE (StringValue);
 479     return (ByteLength - Count);
 480 }
 481 
 482 
 483 /******************************************************************************
 484  *
 485  * FUNCTION:    DtCompileFlag
 486  *
 487  * PARAMETERS:  Buffer              - Output buffer
 488  *              Field               - Field to be compiled
 489  *              Info                - Flag info
 490  *
 491  * RETURN:
 492  *
 493  * DESCRIPTION: Compile a flag
 494  *
 495  *****************************************************************************/
 496 
 497 void
 498 DtCompileFlag (
 499     UINT8                   *Buffer,
 500     DT_FIELD                *Field,
 501     ACPI_DMTABLE_INFO       *Info)
 502 {
 503     UINT64                  Value = 0;
 504     UINT32                  BitLength = 1;
 505     UINT8                   BitPosition = 0;
 506     ACPI_STATUS             Status;
 507 
 508 
 509     Status = DtStrtoul64 (Field->Value, &Value);
 510     if (ACPI_FAILURE (Status))
 511     {
 512         DtError (ASL_ERROR, ASL_MSG_INVALID_HEX_INTEGER, Field, NULL);
 513     }
 514 
 515     switch (Info->Opcode)
 516     {
 517     case ACPI_DMT_FLAG0:
 518     case ACPI_DMT_FLAG1:
 519     case ACPI_DMT_FLAG2:
 520     case ACPI_DMT_FLAG3:
 521     case ACPI_DMT_FLAG4:
 522     case ACPI_DMT_FLAG5:
 523     case ACPI_DMT_FLAG6:
 524     case ACPI_DMT_FLAG7:
 525 
 526         BitPosition = Info->Opcode;
 527         BitLength = 1;
 528         break;
 529 
 530     case ACPI_DMT_FLAGS0:
 531 
 532         BitPosition = 0;
 533         BitLength = 2;
 534         break;
 535 
 536 
 537     case ACPI_DMT_FLAGS1:
 538 
 539         BitPosition = 1;
 540         BitLength = 2;
 541         break;
 542 
 543 
 544     case ACPI_DMT_FLAGS2:
 545 
 546         BitPosition = 2;
 547         BitLength = 2;
 548         break;
 549 
 550     case ACPI_DMT_FLAGS4:
 551 
 552         BitPosition = 4;
 553         BitLength = 2;
 554         break;
 555 
 556     default:
 557 
 558         DtFatal (ASL_MSG_COMPILER_INTERNAL, Field, "Invalid flag opcode");
 559         break;
 560     }
 561 
 562     /* Check range of the input flag value */
 563 
 564     if (Value >= ((UINT64) 1 << BitLength))
 565     {
 566         sprintf (MsgBuffer, "Maximum %u bit", BitLength);
 567         DtError (ASL_ERROR, ASL_MSG_FLAG_VALUE, Field, MsgBuffer);
 568         Value = 0;
 569     }
 570 
 571     *Buffer |= (UINT8) (Value << BitPosition);
 572 }