drivers/acpi/tables/tbgetall.c

   1 /******************************************************************************
   2  *
   3  * Module Name: tbgetall - Get all required ACPI tables
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2005, 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    ("tbgetall")
  51
  52
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    acpi_tb_get_primary_table
  56  *
  57  * PARAMETERS:  Address             - Physical address of table to retrieve
  58  *              *table_info         - Where the table info is returned
  59  *
  60  * RETURN:      Status
  61  *
  62  * DESCRIPTION: Maps the physical address of table into a logical address
  63  *
  64  ******************************************************************************/
  65
  66 acpi_status
  67 acpi_tb_get_primary_table (
  68         struct acpi_pointer             *address,
  69         struct acpi_table_desc          *table_info)
  70 {
  71         acpi_status                     status;
  72         struct acpi_table_header        header;
  73
  74
  75         ACPI_FUNCTION_TRACE ("tb_get_primary_table");
  76
  77
  78         /* Ignore a NULL address in the RSDT */
  79
  80         if (!address->pointer.value) {
  81                 return_ACPI_STATUS (AE_OK);
  82         }
  83
  84         /*
  85          * Get the header in order to get signature and table size
  86          */
  87         status = acpi_tb_get_table_header (address, &header);
  88         if (ACPI_FAILURE (status)) {
  89                 return_ACPI_STATUS (status);
  90         }
  91
  92         /* Clear the table_info */
  93
  94         ACPI_MEMSET (table_info, 0, sizeof (struct acpi_table_desc));
  95
  96         /*
  97          * Check the table signature and make sure it is recognized.
  98          * Also checks the header checksum
  99          */
 100         table_info->pointer = &header;
 101         status = acpi_tb_recognize_table (table_info, ACPI_TABLE_PRIMARY);
 102         if (ACPI_FAILURE (status)) {
 103                 return_ACPI_STATUS (status);
 104         }
 105
 106         /* Get the entire table */
 107
 108         status = acpi_tb_get_table_body (address, &header, table_info);
 109         if (ACPI_FAILURE (status)) {
 110                 return_ACPI_STATUS (status);
 111         }
 112
 113         /* Install the table */
 114
 115         status = acpi_tb_install_table (table_info);
 116         return_ACPI_STATUS (status);
 117 }
 118
 119
 120 /*******************************************************************************
 121  *
 122  * FUNCTION:    acpi_tb_get_secondary_table
 123  *
 124  * PARAMETERS:  Address             - Physical address of table to retrieve
 125  *              *table_info         - Where the table info is returned
 126  *
 127  * RETURN:      Status
 128  *
 129  * DESCRIPTION: Maps the physical address of table into a logical address
 130  *
 131  ******************************************************************************/
 132
 133 acpi_status
 134 acpi_tb_get_secondary_table (
 135         struct acpi_pointer             *address,
 136         acpi_string                     signature,
 137         struct acpi_table_desc          *table_info)
 138 {
 139         acpi_status                     status;
 140         struct acpi_table_header        header;
 141
 142
 143         ACPI_FUNCTION_TRACE_STR ("tb_get_secondary_table", signature);
 144
 145
 146         /* Get the header in order to match the signature */
 147
 148         status = acpi_tb_get_table_header (address, &header);
 149         if (ACPI_FAILURE (status)) {
 150                 return_ACPI_STATUS (status);
 151         }
 152
 153         /* Signature must match request */
 154
 155         if (ACPI_STRNCMP (header.signature, signature, ACPI_NAME_SIZE)) {
 156                 ACPI_REPORT_ERROR (("Incorrect table signature - wanted [%s] found [%4.4s]\n",
 157                         signature, header.signature));
 158                 return_ACPI_STATUS (AE_BAD_SIGNATURE);
 159         }
 160
 161         /*
 162          * Check the table signature and make sure it is recognized.
 163          * Also checks the header checksum
 164          */
 165         table_info->pointer = &header;
 166         status = acpi_tb_recognize_table (table_info, ACPI_TABLE_SECONDARY);
 167         if (ACPI_FAILURE (status)) {
 168                 return_ACPI_STATUS (status);
 169         }
 170
 171         /* Get the entire table */
 172
 173         status = acpi_tb_get_table_body (address, &header, table_info);
 174         if (ACPI_FAILURE (status)) {
 175                 return_ACPI_STATUS (status);
 176         }
 177
 178         /* Install the table */
 179
 180         status = acpi_tb_install_table (table_info);
 181         return_ACPI_STATUS (status);
 182 }
 183
 184
 185 /*******************************************************************************
 186  *
 187  * FUNCTION:    acpi_tb_get_required_tables
 188  *
 189  * PARAMETERS:  None
 190  *
 191  * RETURN:      Status
 192  *
 193  * DESCRIPTION: Load and validate tables other than the RSDT.  The RSDT must
 194  *              already be loaded and validated.
 195  *
 196  *              Get the minimum set of ACPI tables, namely:
 197  *
 198  *              1) FADT (via RSDT in loop below)
 199  *              2) FACS (via FADT)
 200  *              3) DSDT (via FADT)
 201  *
 202  ******************************************************************************/
 203
 204 acpi_status
 205 acpi_tb_get_required_tables (
 206         void)
 207 {
 208         acpi_status                     status = AE_OK;
 209         u32                             i;
 210         struct acpi_table_desc          table_info;
 211         struct acpi_pointer             address;
 212
 213
 214         ACPI_FUNCTION_TRACE ("tb_get_required_tables");
 215
 216         ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%d ACPI tables in RSDT\n",
 217                 acpi_gbl_rsdt_table_count));
 218
 219
 220         address.pointer_type  = acpi_gbl_table_flags | ACPI_LOGICAL_ADDRESSING;
 221
 222         /*
 223          * Loop through all table pointers found in RSDT.
 224          * This will NOT include the FACS and DSDT - we must get
 225          * them after the loop.
 226          *
 227          * The only tables we are interested in getting here is the FADT and
 228          * any SSDTs.
 229          */
 230         for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
 231                 /* Get the table address from the common internal XSDT */
 232
 233                 address.pointer.value = acpi_gbl_XSDT->table_offset_entry[i];
 234
 235                 /*
 236                  * Get the tables needed by this subsystem (FADT and any SSDTs).
 237                  * NOTE: All other tables are completely ignored at this time.
 238                  */
 239                 status = acpi_tb_get_primary_table (&address, &table_info);
 240                 if ((status != AE_OK) && (status != AE_TABLE_NOT_SUPPORTED)) {
 241                         ACPI_REPORT_WARNING (("%s, while getting table at %8.8X%8.8X\n",
 242                                 acpi_format_exception (status),
 243                                 ACPI_FORMAT_UINT64 (address.pointer.value)));
 244                 }
 245         }
 246
 247         /* We must have a FADT to continue */
 248
 249         if (!acpi_gbl_FADT) {
 250                 ACPI_REPORT_ERROR (("No FADT present in RSDT/XSDT\n"));
 251                 return_ACPI_STATUS (AE_NO_ACPI_TABLES);
 252         }
 253
 254         /*
 255          * Convert the FADT to a common format.  This allows earlier revisions of the
 256          * table to coexist with newer versions, using common access code.
 257          */
 258         status = acpi_tb_convert_table_fadt ();
 259         if (ACPI_FAILURE (status)) {
 260                 ACPI_REPORT_ERROR (("Could not convert FADT to internal common format\n"));
 261                 return_ACPI_STATUS (status);
 262         }
 263
 264         /*
 265          * Get the FACS (Pointed to by the FADT)
 266          */
 267         address.pointer.value = acpi_gbl_FADT->xfirmware_ctrl;
 268
 269         status = acpi_tb_get_secondary_table (&address, FACS_SIG, &table_info);
 270         if (ACPI_FAILURE (status)) {
 271                 ACPI_REPORT_ERROR (("Could not get/install the FACS, %s\n",
 272                         acpi_format_exception (status)));
 273                 return_ACPI_STATUS (status);
 274         }
 275
 276         /*
 277          * Create the common FACS pointer table
 278          * (Contains pointers to the original table)
 279          */
 280         status = acpi_tb_build_common_facs (&table_info);
 281         if (ACPI_FAILURE (status)) {
 282                 return_ACPI_STATUS (status);
 283         }
 284
 285         /*
 286          * Get/install the DSDT (Pointed to by the FADT)
 287          */
 288         address.pointer.value = acpi_gbl_FADT->Xdsdt;
 289
 290         status = acpi_tb_get_secondary_table (&address, DSDT_SIG, &table_info);
 291         if (ACPI_FAILURE (status)) {
 292                 ACPI_REPORT_ERROR (("Could not get/install the DSDT\n"));
 293                 return_ACPI_STATUS (status);
 294         }
 295
 296         /* Set Integer Width (32/64) based upon DSDT revision */
 297
 298         acpi_ut_set_integer_width (acpi_gbl_DSDT->revision);
 299
 300         /* Dump the entire DSDT */
 301
 302         ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
 303                 "Hex dump of entire DSDT, size %d (0x%X), Integer width = %d\n",
 304                 acpi_gbl_DSDT->length, acpi_gbl_DSDT->length, acpi_gbl_integer_bit_width));
 305         ACPI_DUMP_BUFFER ((u8 *) acpi_gbl_DSDT, acpi_gbl_DSDT->length);
 306
 307         /* Always delete the RSDP mapping, we are done with it */
 308
 309         acpi_tb_delete_tables_by_type (ACPI_TABLE_RSDP);
 310         return_ACPI_STATUS (status);
 311 }
 312
 313