drivers/acpi/tables/tbconvrt.c

   1 /******************************************************************************
   2  *
   3  * Module Name: tbconvrt - ACPI Table conversion utilities
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2004, R. Byron Moore
   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
  45 #include <acpi/acpi.h>
  46 #include <acpi/actables.h>
  47
  48
  49 #define _COMPONENT          ACPI_TABLES
  50          ACPI_MODULE_NAME    ("tbconvrt")
  51
  52
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    acpi_tb_get_table_count
  56  *
  57  * PARAMETERS:  RSDP            - Pointer to the RSDP
  58  *              RSDT            - Pointer to the RSDT/XSDT
  59  *
  60  * RETURN:      The number of tables pointed to by the RSDT or XSDT.
  61  *
  62  * DESCRIPTION: Calculate the number of tables.  Automatically handles either
  63  *              an RSDT or XSDT.
  64  *
  65  ******************************************************************************/
  66
  67 u32
  68 acpi_tb_get_table_count (
  69         struct rsdp_descriptor          *RSDP,
  70         struct acpi_table_header        *RSDT)
  71 {
  72         u32                             pointer_size;
  73
  74
  75         ACPI_FUNCTION_ENTRY ();
  76
  77
  78         if (RSDP->revision < 2) {
  79                 pointer_size = sizeof (u32);
  80         }
  81         else {
  82                 pointer_size = sizeof (u64);
  83         }
  84
  85         /*
  86          * Determine the number of tables pointed to by the RSDT/XSDT.
  87          * This is defined by the ACPI Specification to be the number of
  88          * pointers contained within the RSDT/XSDT.  The size of the pointers
  89          * is architecture-dependent.
  90          */
  91         return ((RSDT->length - sizeof (struct acpi_table_header)) / pointer_size);
  92 }
  93
  94
  95 /*******************************************************************************
  96  *
  97  * FUNCTION:    acpi_tb_convert_to_xsdt
  98  *
  99  * PARAMETERS:  table_info      - Info about the RSDT
 100  *
 101  * RETURN:      Status
 102  *
 103  * DESCRIPTION: Convert an RSDT to an XSDT (internal common format)
 104  *
 105  ******************************************************************************/
 106
 107 acpi_status
 108 acpi_tb_convert_to_xsdt (
 109         struct acpi_table_desc          *table_info)
 110 {
 111         acpi_size                       table_size;
 112         u32                             i;
 113         XSDT_DESCRIPTOR         *new_table;
 114
 115
 116         ACPI_FUNCTION_ENTRY ();
 117
 118
 119         /* Compute size of the converted XSDT */
 120
 121         table_size = ((acpi_size) acpi_gbl_rsdt_table_count * sizeof (u64)) +
 122                           sizeof (struct acpi_table_header);
 123
 124         /* Allocate an XSDT */
 125
 126         new_table = ACPI_MEM_CALLOCATE (table_size);
 127         if (!new_table) {
 128                 return (AE_NO_MEMORY);
 129         }
 130
 131         /* Copy the header and set the length */
 132
 133         ACPI_MEMCPY (new_table, table_info->pointer, sizeof (struct acpi_table_header));
 134         new_table->length = (u32) table_size;
 135
 136         /* Copy the table pointers */
 137
 138         for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
 139                 if (acpi_gbl_RSDP->revision < 2) {
 140                         ACPI_STORE_ADDRESS (new_table->table_offset_entry[i],
 141                                 (ACPI_CAST_PTR (struct rsdt_descriptor_rev1, table_info->pointer))->table_offset_entry[i]);
 142                 }
 143                 else {
 144                         new_table->table_offset_entry[i] =
 145                                 (ACPI_CAST_PTR (XSDT_DESCRIPTOR, table_info->pointer))->table_offset_entry[i];
 146                 }
 147         }
 148
 149         /* Delete the original table (either mapped or in a buffer) */
 150
 151         acpi_tb_delete_single_table (table_info);
 152
 153         /* Point the table descriptor to the new table */
 154
 155         table_info->pointer     = ACPI_CAST_PTR (struct acpi_table_header, new_table);
 156         table_info->length      = table_size;
 157         table_info->allocation  = ACPI_MEM_ALLOCATED;
 158
 159         return (AE_OK);
 160 }
 161
 162
 163 /******************************************************************************
 164  *
 165  * FUNCTION:    acpi_tb_init_generic_address
 166  *
 167  * PARAMETERS:  new_gas_struct      - GAS struct to be initialized
 168  *              register_bit_width  - Width of this register
 169  *              Address             - Address of the register
 170  *
 171  * RETURN:      None
 172  *
 173  * DESCRIPTION: Initialize a GAS structure.
 174  *
 175  ******************************************************************************/
 176
 177 static void
 178 acpi_tb_init_generic_address (
 179         struct acpi_generic_address     *new_gas_struct,
 180         u8                              register_bit_width,
 181         acpi_physical_address           address)
 182 {
 183
 184         ACPI_STORE_ADDRESS (new_gas_struct->address, address);
 185
 186         new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
 187         new_gas_struct->register_bit_width = register_bit_width;
 188         new_gas_struct->register_bit_offset = 0;
 189         new_gas_struct->reserved        = 0;
 190 }
 191
 192
 193 /*******************************************************************************
 194  *
 195  * FUNCTION:    acpi_tb_convert_fadt1
 196  *
 197  * PARAMETERS:  local_fadt      - Pointer to new FADT
 198  *              original_fadt   - Pointer to old FADT
 199  *
 200  * RETURN:      Populates local_fadt
 201  *
 202  * DESCRIPTION: Convert an ACPI 1.0 FADT to common internal format
 203  *
 204  ******************************************************************************/
 205
 206 static void
 207 acpi_tb_convert_fadt1 (
 208         struct fadt_descriptor_rev2    *local_fadt,
 209         struct fadt_descriptor_rev1    *original_fadt)
 210 {
 211
 212
 213         /* ACPI 1.0 FACS */
 214         /* The BIOS stored FADT should agree with Revision 1.0 */
 215
 216         /*
 217          * Copy the table header and the common part of the tables.
 218          *
 219          * The 2.0 table is an extension of the 1.0 table, so the entire 1.0
 220          * table can be copied first, then expand some fields to 64 bits.
 221          */
 222         ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev1));
 223
 224         /* Convert table pointers to 64-bit fields */
 225
 226         ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl);
 227         ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
 228
 229         /*
 230          * System Interrupt Model isn't used in ACPI 2.0 (local_fadt->Reserved1 = 0;)
 231          */
 232
 233         /*
 234          * This field is set by the OEM to convey the preferred power management
 235          * profile to OSPM. It doesn't have any 1.0 equivalence.  Since we don't
 236          * know what kind of 32-bit system this is, we will use "unspecified".
 237          */
 238         local_fadt->prefer_PM_profile = PM_UNSPECIFIED;
 239
 240         /*
 241          * Processor Performance State Control. This is the value OSPM writes to
 242          * the SMI_CMD register to assume processor performance state control
 243          * responsibility. There isn't any equivalence in 1.0, leave it zeroed.
 244          */
 245         local_fadt->pstate_cnt = 0;
 246
 247         /*
 248          * Support for the _CST object and C States change notification.
 249          * This data item hasn't any 1.0 equivalence so leave it zero.
 250          */
 251         local_fadt->cst_cnt = 0;
 252
 253         /*
 254          * Since there isn't any equivalence in 1.0 and since it highly likely
 255          * that a 1.0 system has legacy support.
 256          */
 257         local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES;
 258
 259         /*
 260          * Convert the V1.0 block addresses to V2.0 GAS structures
 261          */
 262         acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk, local_fadt->pm1_evt_len,
 263                           (acpi_physical_address)   local_fadt->V1_pm1a_evt_blk);
 264         acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk, local_fadt->pm1_evt_len,
 265                           (acpi_physical_address)   local_fadt->V1_pm1b_evt_blk);
 266         acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk, local_fadt->pm1_cnt_len,
 267                           (acpi_physical_address)   local_fadt->V1_pm1a_cnt_blk);
 268         acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk, local_fadt->pm1_cnt_len,
 269                           (acpi_physical_address)   local_fadt->V1_pm1b_cnt_blk);
 270         acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk, local_fadt->pm2_cnt_len,
 271                           (acpi_physical_address)   local_fadt->V1_pm2_cnt_blk);
 272         acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk, local_fadt->pm_tm_len,
 273                           (acpi_physical_address)   local_fadt->V1_pm_tmr_blk);
 274         acpi_tb_init_generic_address (&local_fadt->xgpe0_blk, 0,
 275                           (acpi_physical_address)   local_fadt->V1_gpe0_blk);
 276         acpi_tb_init_generic_address (&local_fadt->xgpe1_blk, 0,
 277                           (acpi_physical_address)   local_fadt->V1_gpe1_blk);
 278
 279         /* Create separate GAS structs for the PM1 Enable registers */
 280
 281         acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
 282                  (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
 283                  (acpi_physical_address) (local_fadt->xpm1a_evt_blk.address +
 284                         ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
 285
 286         /* PM1B is optional; leave null if not present */
 287
 288         if (local_fadt->xpm1b_evt_blk.address) {
 289                 acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
 290                          (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
 291                          (acpi_physical_address) (local_fadt->xpm1b_evt_blk.address +
 292                                 ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
 293         }
 294 }
 295
 296
 297 /*******************************************************************************
 298  *
 299  * FUNCTION:    acpi_tb_convert_fadt2
 300  *
 301  * PARAMETERS:  local_fadt      - Pointer to new FADT
 302  *              original_fadt   - Pointer to old FADT
 303  *
 304  * RETURN:      Populates local_fadt
 305  *
 306  * DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format.
 307  *              Handles optional "X" fields.
 308  *
 309  ******************************************************************************/
 310
 311 static void
 312 acpi_tb_convert_fadt2 (
 313         struct fadt_descriptor_rev2    *local_fadt,
 314         struct fadt_descriptor_rev2    *original_fadt)
 315 {
 316
 317         /* We have an ACPI 2.0 FADT but we must copy it to our local buffer */
 318
 319         ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev2));
 320
 321         /*
 322          * "X" fields are optional extensions to the original V1.0 fields, so
 323          * we must selectively expand V1.0 fields if the corresponding X field
 324          * is zero.
 325          */
 326         if (!(local_fadt->xfirmware_ctrl)) {
 327                 ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl);
 328         }
 329
 330         if (!(local_fadt->Xdsdt)) {
 331                 ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
 332         }
 333
 334         if (!(local_fadt->xpm1a_evt_blk.address)) {
 335                 acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk,
 336                         local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1a_evt_blk);
 337         }
 338
 339         if (!(local_fadt->xpm1b_evt_blk.address)) {
 340                 acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk,
 341                         local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1b_evt_blk);
 342         }
 343
 344         if (!(local_fadt->xpm1a_cnt_blk.address)) {
 345                 acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk,
 346                         local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1a_cnt_blk);
 347         }
 348
 349         if (!(local_fadt->xpm1b_cnt_blk.address)) {
 350                 acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk,
 351                         local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1b_cnt_blk);
 352         }
 353
 354         if (!(local_fadt->xpm2_cnt_blk.address)) {
 355                 acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk,
 356                         local_fadt->pm2_cnt_len, (acpi_physical_address) local_fadt->V1_pm2_cnt_blk);
 357         }
 358
 359         if (!(local_fadt->xpm_tmr_blk.address)) {
 360                 acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk,
 361                         local_fadt->pm_tm_len, (acpi_physical_address) local_fadt->V1_pm_tmr_blk);
 362         }
 363
 364         if (!(local_fadt->xgpe0_blk.address)) {
 365                 acpi_tb_init_generic_address (&local_fadt->xgpe0_blk,
 366                         0, (acpi_physical_address) local_fadt->V1_gpe0_blk);
 367         }
 368
 369         if (!(local_fadt->xgpe1_blk.address)) {
 370                 acpi_tb_init_generic_address (&local_fadt->xgpe1_blk,
 371                         0, (acpi_physical_address) local_fadt->V1_gpe1_blk);
 372         }
 373
 374         /* Create separate GAS structs for the PM1 Enable registers */
 375
 376         acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
 377                 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
 378                 (acpi_physical_address) (local_fadt->xpm1a_evt_blk.address +
 379                         ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
 380         acpi_gbl_xpm1a_enable.address_space_id = local_fadt->xpm1a_evt_blk.address_space_id;
 381
 382         /* PM1B is optional; leave null if not present */
 383
 384         if (local_fadt->xpm1b_evt_blk.address) {
 385                 acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
 386                         (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
 387                         (acpi_physical_address) (local_fadt->xpm1b_evt_blk.address +
 388                                 ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
 389                 acpi_gbl_xpm1b_enable.address_space_id = local_fadt->xpm1b_evt_blk.address_space_id;
 390         }
 391 }
 392
 393
 394 /*******************************************************************************
 395  *
 396  * FUNCTION:    acpi_tb_convert_table_fadt
 397  *
 398  * PARAMETERS:  None
 399  *
 400  * RETURN:      Status
 401  *
 402  * DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
 403  *              ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
 404  *              copied to the local FADT.  The ACPI CA software uses this
 405  *              local FADT. Thus a significant amount of special #ifdef
 406  *              type codeing is saved.
 407  *
 408  ******************************************************************************/
 409
 410 acpi_status
 411 acpi_tb_convert_table_fadt (void)
 412 {
 413         struct fadt_descriptor_rev2    *local_fadt;
 414         struct acpi_table_desc         *table_desc;
 415
 416
 417         ACPI_FUNCTION_TRACE ("tb_convert_table_fadt");
 418
 419
 420         /*
 421          * acpi_gbl_FADT is valid
 422          * Allocate and zero the 2.0 FADT buffer
 423          */
 424         local_fadt = ACPI_MEM_CALLOCATE (sizeof (struct fadt_descriptor_rev2));
 425         if (local_fadt == NULL) {
 426                 return_ACPI_STATUS (AE_NO_MEMORY);
 427         }
 428
 429         /*
 430          * FADT length and version validation.  The table must be at least as
 431          * long as the version 1.0 FADT
 432          */
 433         if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev1)) {
 434                 ACPI_REPORT_ERROR (("Invalid FADT table length: 0x%X\n", acpi_gbl_FADT->length));
 435                 return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
 436         }
 437
 438         if (acpi_gbl_FADT->revision >= FADT2_REVISION_ID) {
 439                 if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev2)) {
 440                         /* Length is too short to be a V2.0 table */
 441
 442                         ACPI_REPORT_WARNING (("Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table\n",
 443                                          acpi_gbl_FADT->length, acpi_gbl_FADT->revision));
 444
 445                         acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
 446                 }
 447                 else {
 448                         /* Valid V2.0 table */
 449
 450                         acpi_tb_convert_fadt2 (local_fadt, acpi_gbl_FADT);
 451                 }
 452         }
 453         else {
 454                 /* Valid V1.0 table */
 455
 456                 acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
 457         }
 458
 459         /*
 460          * Global FADT pointer will point to the new common V2.0 FADT
 461          */
 462         acpi_gbl_FADT = local_fadt;
 463         acpi_gbl_FADT->length = sizeof (FADT_DESCRIPTOR);
 464
 465         /* Free the original table */
 466
 467         table_desc = acpi_gbl_table_lists[ACPI_TABLE_FADT].next;
 468         acpi_tb_delete_single_table (table_desc);
 469
 470         /* Install the new table */
 471
 472         table_desc->pointer     = ACPI_CAST_PTR (struct acpi_table_header, acpi_gbl_FADT);
 473         table_desc->allocation  = ACPI_MEM_ALLOCATED;
 474         table_desc->length      = sizeof (struct fadt_descriptor_rev2);
 475
 476         /* Dump the entire FADT */
 477
 478         ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
 479                 "Hex dump of common internal FADT, size %d (%X)\n",
 480                 acpi_gbl_FADT->length, acpi_gbl_FADT->length));
 481         ACPI_DUMP_BUFFER ((u8 *) (acpi_gbl_FADT), acpi_gbl_FADT->length);
 482
 483         return_ACPI_STATUS (AE_OK);
 484 }
 485
 486
 487 /*******************************************************************************
 488  *
 489  * FUNCTION:    acpi_tb_convert_table_facs
 490  *
 491  * PARAMETERS:  table_info      - Info for currently installad FACS
 492  *
 493  * RETURN:      Status
 494  *
 495  * DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal
 496  *              table format.
 497  *
 498  ******************************************************************************/
 499
 500 acpi_status
 501 acpi_tb_build_common_facs (
 502         struct acpi_table_desc          *table_info)
 503 {
 504
 505         ACPI_FUNCTION_TRACE ("tb_build_common_facs");
 506
 507
 508         /* Absolute minimum length is 24, but the ACPI spec says 64 */
 509
 510         if (acpi_gbl_FACS->length < 24) {
 511                 ACPI_REPORT_ERROR (("Invalid FACS table length: 0x%X\n", acpi_gbl_FACS->length));
 512                 return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
 513         }
 514
 515         if (acpi_gbl_FACS->length < 64) {
 516                 ACPI_REPORT_WARNING (("FACS is shorter than the ACPI specification allows: 0x%X, using anyway\n",
 517                         acpi_gbl_FACS->length));
 518         }
 519
 520         /* Copy fields to the new FACS */
 521
 522         acpi_gbl_common_fACS.global_lock = &(acpi_gbl_FACS->global_lock);
 523
 524         if ((acpi_gbl_RSDP->revision < 2) ||
 525                 (acpi_gbl_FACS->length < 32) ||
 526                 (!(acpi_gbl_FACS->xfirmware_waking_vector))) {
 527                 /* ACPI 1.0 FACS or short table or optional X_ field is zero */
 528
 529                 acpi_gbl_common_fACS.firmware_waking_vector = ACPI_CAST_PTR (u64, &(acpi_gbl_FACS->firmware_waking_vector));
 530                 acpi_gbl_common_fACS.vector_width = 32;
 531         }
 532         else {
 533                 /* ACPI 2.0 FACS with valid X_ field */
 534
 535                 acpi_gbl_common_fACS.firmware_waking_vector = &acpi_gbl_FACS->xfirmware_waking_vector;
 536                 acpi_gbl_common_fACS.vector_width = 64;
 537         }
 538
 539         return_ACPI_STATUS (AE_OK);
 540 }
 541
 542