arch/all-pc/acpica/source/compiler/asloffset.c

   1 /******************************************************************************
   2  *
   3  * Module Name: asloffset - Generate a C "offset table" for BIOS use.
   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 #include "aslcompiler.h"
  45 #include "aslcompiler.y.h"
  46 #include "amlcode.h"
  47 #include "acnamesp.h"
  48
  49
  50 #define _COMPONENT          ACPI_COMPILER
  51         ACPI_MODULE_NAME    ("asloffset")
  52
  53
  54 /* Local prototypes */
  55
  56 static void
  57 LsEmitOffsetTableEntry (
  58     UINT32                  FileId,
  59     ACPI_NAMESPACE_NODE     *Node,
  60     UINT32                  NamepathOffset,
  61     UINT32                  Offset,
  62     char                    *OpName,
  63     UINT64                  Value,
  64     UINT8                   AmlOpcode,
  65     UINT16                  ParentOpcode);
  66
  67
  68 /*******************************************************************************
  69  *
  70  * FUNCTION:    LsAmlOffsetWalk
  71  *
  72  * PARAMETERS:  ASL_WALK_CALLBACK
  73  *
  74  * RETURN:      Status
  75  *
  76  * DESCRIPTION: Process one node during a offset table file generation.
  77  *
  78  * Three types of objects are currently emitted to the offset table:
  79  *   1) Tagged (named) resource descriptors
  80  *   2) Named integer objects with constant integer values
  81  *   3) Named package objects
  82  *   4) Operation Regions that have constant Offset (address) parameters
  83  *   5) Control methods
  84  *
  85  * The offset table allows the BIOS to dynamically update the values of these
  86  * objects at boot time.
  87  *
  88  ******************************************************************************/
  89
  90 ACPI_STATUS
  91 LsAmlOffsetWalk (
  92     ACPI_PARSE_OBJECT       *Op,
  93     UINT32                  Level,
  94     void                    *Context)
  95 {
  96     UINT32                  FileId = (UINT32) ACPI_TO_INTEGER (Context);
  97     ACPI_NAMESPACE_NODE     *Node;
  98     UINT32                  Length;
  99     UINT32                  NamepathOffset;
 100     UINT32                  DataOffset;
 101     ACPI_PARSE_OBJECT       *NextOp;
 102
 103
 104     /* Ignore actual data blocks for resource descriptors */
 105
 106     if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DATA)
 107     {
 108         return (AE_OK); /* Do NOT update the global AML offset */
 109     }
 110
 111     /* We are only interested in named objects (have a namespace node) */
 112
 113     Node = Op->Asl.Node;
 114     if (!Node)
 115     {
 116         Gbl_CurrentAmlOffset += Op->Asl.FinalAmlLength;
 117         return (AE_OK);
 118     }
 119
 120     /* Named resource descriptor (has a descriptor tag) */
 121
 122     if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE) &&
 123         (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC))
 124     {
 125         LsEmitOffsetTableEntry (FileId, Node, 0, Gbl_CurrentAmlOffset,
 126             Op->Asl.ParseOpName, 0, Op->Asl.Extra, AML_BUFFER_OP);
 127
 128         Gbl_CurrentAmlOffset += Op->Asl.FinalAmlLength;
 129         return (AE_OK);
 130     }
 131
 132     switch (Op->Asl.AmlOpcode)
 133     {
 134     case AML_NAME_OP:
 135
 136         /* Named object -- Name (NameString, DataRefObject) */
 137
 138         if (!Op->Asl.Child)
 139         {
 140             FlPrintFile (FileId, "%s NO CHILD!\n", MsgBuffer);
 141             return (AE_OK);
 142         }
 143
 144         Length = Op->Asl.FinalAmlLength;
 145         NamepathOffset = Gbl_CurrentAmlOffset + Length;
 146
 147         /* Get to the NameSeg/NamePath Op (and length of the name) */
 148
 149         Op = Op->Asl.Child;
 150
 151         /* Get offset of last nameseg and the actual data */
 152
 153         NamepathOffset = Gbl_CurrentAmlOffset + Length +
 154             (Op->Asl.FinalAmlLength - ACPI_NAME_SIZE);
 155
 156         DataOffset = Gbl_CurrentAmlOffset + Length +
 157             Op->Asl.FinalAmlLength;
 158
 159         /* Get actual value associated with the name */
 160
 161         Op = Op->Asl.Next;
 162         switch (Op->Asl.AmlOpcode)
 163         {
 164         case AML_BYTE_OP:
 165         case AML_WORD_OP:
 166         case AML_DWORD_OP:
 167         case AML_QWORD_OP:
 168
 169             /* The +1 is to handle the integer size prefix (opcode) */
 170
 171             LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, (DataOffset + 1),
 172                 Op->Asl.ParseOpName, Op->Asl.Value.Integer,
 173                 (UINT8) Op->Asl.AmlOpcode, AML_NAME_OP);
 174             break;
 175
 176         case AML_ONE_OP:
 177         case AML_ONES_OP:
 178         case AML_ZERO_OP:
 179
 180             /* For these, offset will point to the opcode */
 181
 182             LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, DataOffset,
 183                 Op->Asl.ParseOpName, Op->Asl.Value.Integer,
 184                 (UINT8) Op->Asl.AmlOpcode, AML_NAME_OP);
 185             break;
 186
 187         case AML_PACKAGE_OP:
 188         case AML_VAR_PACKAGE_OP:
 189
 190             /* Get the package element count */
 191
 192             NextOp = Op->Asl.Child;
 193
 194             LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, DataOffset,
 195                 Op->Asl.ParseOpName, NextOp->Asl.Value.Integer,
 196                 (UINT8) Op->Asl.AmlOpcode, AML_NAME_OP);
 197             break;
 198
 199          default:
 200              break;
 201         }
 202
 203         Gbl_CurrentAmlOffset += Length;
 204         return (AE_OK);
 205
 206     case AML_REGION_OP:
 207
 208         /* OperationRegion (NameString, RegionSpace, RegionOffset, RegionLength) */
 209
 210         Length = Op->Asl.FinalAmlLength;
 211
 212         /* Get the name/namepath node */
 213
 214         NextOp = Op->Asl.Child;
 215
 216         /* Get offset of last nameseg and the actual data */
 217
 218         NamepathOffset = Gbl_CurrentAmlOffset + Length +
 219             (NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE);
 220
 221         DataOffset = Gbl_CurrentAmlOffset + Length +
 222             (NextOp->Asl.FinalAmlLength + 1);
 223
 224         /* Get the SpaceId node, then the Offset (address) node */
 225
 226         NextOp = NextOp->Asl.Next;
 227         NextOp = NextOp->Asl.Next;
 228
 229         switch (NextOp->Asl.AmlOpcode)
 230         {
 231         /*
 232          * We are only interested in integer constants that can be changed
 233          * at boot time. Note, the One/Ones/Zero opcodes are considered
 234          * non-changeable, so we ignore them here.
 235          */
 236         case AML_BYTE_OP:
 237         case AML_WORD_OP:
 238         case AML_DWORD_OP:
 239         case AML_QWORD_OP:
 240
 241             LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, (DataOffset + 1),
 242                 Op->Asl.ParseOpName, NextOp->Asl.Value.Integer,
 243                 (UINT8) NextOp->Asl.AmlOpcode, AML_REGION_OP);
 244
 245             Gbl_CurrentAmlOffset += Length;
 246             return (AE_OK);
 247
 248         default:
 249             break;
 250         }
 251         break;
 252
 253     case AML_METHOD_OP:
 254
 255         /* Method (Namepath, ...) */
 256
 257         Length = Op->Asl.FinalAmlLength;
 258
 259         /* Get the NameSeg/NamePath Op */
 260
 261         NextOp = Op->Asl.Child;
 262
 263         /* Get offset of last nameseg and the actual data (flags byte) */
 264
 265         NamepathOffset = Gbl_CurrentAmlOffset + Length +
 266             (NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE);
 267
 268         DataOffset = Gbl_CurrentAmlOffset + Length +
 269             NextOp->Asl.FinalAmlLength;
 270
 271         /* Get the flags byte Op */
 272
 273         NextOp = NextOp->Asl.Next;
 274
 275         LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, DataOffset,
 276             Op->Asl.ParseOpName, NextOp->Asl.Value.Integer,
 277             (UINT8) Op->Asl.AmlOpcode, AML_METHOD_OP);
 278         break;
 279
 280     case AML_PROCESSOR_OP:
 281
 282         /* Processor (Namepath, ProcessorId, Address, Length) */
 283
 284         Length = Op->Asl.FinalAmlLength;
 285         NextOp = Op->Asl.Child;     /* Get Namepath */
 286
 287         /* Get offset of last nameseg and the actual data (PBlock address) */
 288
 289         NamepathOffset = Gbl_CurrentAmlOffset + Length +
 290             (NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE);
 291
 292         DataOffset = Gbl_CurrentAmlOffset + Length +
 293             (NextOp->Asl.FinalAmlLength + 1);
 294
 295         NextOp = NextOp->Asl.Next;  /* Get ProcessorID (BYTE) */
 296         NextOp = NextOp->Asl.Next;  /* Get Address (DWORD) */
 297
 298         LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, DataOffset,
 299             Op->Asl.ParseOpName, NextOp->Asl.Value.Integer,
 300             (UINT8) AML_DWORD_OP, AML_PROCESSOR_OP);
 301         break;
 302
 303     case AML_DEVICE_OP:
 304     case AML_SCOPE_OP:
 305     case AML_THERMAL_ZONE_OP:
 306
 307         /* Device/Scope/ThermalZone (Namepath) */
 308
 309         Length = Op->Asl.FinalAmlLength;
 310         NextOp = Op->Asl.Child;     /* Get Namepath */
 311
 312         /* Get offset of last nameseg */
 313
 314         NamepathOffset = Gbl_CurrentAmlOffset + Length +
 315             (NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE);
 316
 317         LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, 0,
 318             Op->Asl.ParseOpName, 0, (UINT8) 0, Op->Asl.AmlOpcode);
 319         break;
 320
 321     default:
 322         break;
 323     }
 324
 325     Gbl_CurrentAmlOffset += Op->Asl.FinalAmlLength;
 326     return (AE_OK);
 327 }
 328
 329
 330 /*******************************************************************************
 331  *
 332  * FUNCTION:    LsEmitOffsetTableEntry
 333  *
 334  * PARAMETERS:  FileId          - ID of current listing file
 335  *              Node            - Namespace node associated with the name
 336  *              Offset          - Offset of the value within the AML table
 337  *              OpName          - Name of the AML opcode
 338  *              Value           - Current value of the AML field
 339  *              AmlOpcode       - Opcode associated with the field
 340  *              ObjectType      - ACPI object type
 341  *
 342  * RETURN:      None
 343  *
 344  * DESCRIPTION: Emit a line of the offset table (-so option)
 345  *
 346  ******************************************************************************/
 347
 348 static void
 349 LsEmitOffsetTableEntry (
 350     UINT32                  FileId,
 351     ACPI_NAMESPACE_NODE     *Node,
 352     UINT32                  NamepathOffset,
 353     UINT32                  Offset,
 354     char                    *OpName,
 355     UINT64                  Value,
 356     UINT8                   AmlOpcode,
 357     UINT16                  ParentOpcode)
 358 {
 359     ACPI_BUFFER             TargetPath;
 360     ACPI_STATUS             Status;
 361
 362
 363     /* Get the full pathname to the namespace node */
 364
 365     TargetPath.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
 366     Status = AcpiNsHandleToPathname (Node, &TargetPath);
 367     if (ACPI_FAILURE (Status))
 368     {
 369         return;
 370     }
 371
 372     /* [1] - Skip the opening backslash for the path */
 373
 374     strcpy (MsgBuffer, "\"");
 375     strcat (MsgBuffer, &((char *) TargetPath.Pointer)[1]);
 376     strcat (MsgBuffer, "\",");
 377     ACPI_FREE (TargetPath.Pointer);
 378
 379     /*
 380      * Max offset is 4G, constrained by 32-bit ACPI table length.
 381      * Max Length for Integers is 8 bytes.
 382      */
 383     FlPrintFile (FileId,
 384         "    {%-29s 0x%4.4X, 0x%8.8X, 0x%2.2X, 0x%8.8X, 0x%8.8X%8.8X}, /* %s */\n",
 385         MsgBuffer, ParentOpcode, NamepathOffset, AmlOpcode,
 386         Offset, ACPI_FORMAT_UINT64 (Value), OpName);
 387 }
 388
 389
 390 /*******************************************************************************
 391  *
 392  * FUNCTION:    LsDoOffsetTableHeader, LsDoOffsetTableFooter
 393  *
 394  * PARAMETERS:  FileId          - ID of current listing file
 395  *
 396  * RETURN:      None
 397  *
 398  * DESCRIPTION: Header and footer for the offset table file.
 399  *
 400  ******************************************************************************/
 401
 402 void
 403 LsDoOffsetTableHeader (
 404     UINT32                  FileId)
 405 {
 406
 407     FlPrintFile (FileId,
 408         "#ifndef __AML_OFFSET_TABLE_H\n"
 409         "#define __AML_OFFSET_TABLE_H\n\n");
 410
 411     FlPrintFile (FileId, "typedef struct {\n"
 412         "    char                   *Pathname;      /* Full pathname (from root) to the object */\n"
 413         "    unsigned short         ParentOpcode;   /* AML opcode for the parent object */\n"
 414         "    unsigned long          NamesegOffset;  /* Offset of last nameseg in the parent namepath */\n"
 415         "    unsigned char          Opcode;         /* AML opcode for the data */\n"
 416         "    unsigned long          Offset;         /* Offset for the data */\n"
 417         "    unsigned long long     Value;          /* Original value of the data (as applicable) */\n"
 418         "} AML_OFFSET_TABLE_ENTRY;\n\n");
 419
 420     FlPrintFile (FileId,
 421         "#endif /* __AML_OFFSET_TABLE_H */\n\n");
 422
 423     FlPrintFile (FileId,
 424         "/*\n"
 425         " * Information specific to the supported object types:\n"
 426         " *\n"
 427         " * Integers:\n"
 428         " *    Opcode is the integer prefix, indicates length of the data\n"
 429         " *        (One of: BYTE, WORD, DWORD, QWORD, ZERO, ONE, ONES)\n"
 430         " *    Offset points to the actual integer data\n"
 431         " *    Value is the existing value in the AML\n"
 432         " *\n"
 433         " * Packages:\n"
 434         " *    Opcode is the package or var_package opcode\n"
 435         " *    Offset points to the package opcode\n"
 436         " *    Value is the package element count\n"
 437         " *\n"
 438         " * Operation Regions:\n"
 439         " *    Opcode is the address integer prefix, indicates length of the data\n"
 440         " *    Offset points to the region address\n"
 441         " *    Value is the existing address value in the AML\n"
 442         " *\n"
 443         " * Control Methods:\n"
 444         " *    Offset points to the method flags byte\n"
 445         " *    Value is the existing flags value in the AML\n"
 446         " *\n"
 447         " * Processors:\n"
 448         " *    Offset points to the first byte of the PBlock Address\n"
 449         " *\n"
 450         " * Resource Descriptors:\n"
 451         " *    Opcode is the descriptor type\n"
 452         " *    Offset points to the start of the descriptor\n"
 453         " *\n"
 454         " * Scopes/Devices/ThermalZones:\n"
 455         " *    Nameseg offset only\n"
 456         " */\n");
 457
 458     FlPrintFile (FileId,
 459         "AML_OFFSET_TABLE_ENTRY   %s_%s_OffsetTable[] =\n{\n",
 460         Gbl_TableSignature, Gbl_TableId);
 461 }
 462
 463
 464 void
 465 LsDoOffsetTableFooter (
 466     UINT32                  FileId)
 467 {
 468
 469     FlPrintFile (FileId,
 470         "    {NULL,0,0,0,0,0} /* Table terminator */\n};\n\n");
 471     Gbl_CurrentAmlOffset = 0;
 472 }