err.no Git - linux-2.6/blob - drivers/acpi/utilities/utinit.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utinit - Common ACPI subsystem initialization
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, 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 #include <acpi/acpi.h>
  45 #include <acpi/acnamesp.h>
  46 #include <acpi/acevents.h>
  47 #include <acpi/actables.h>
  48
  49 #define _COMPONENT          ACPI_UTILITIES
  50 ACPI_MODULE_NAME("utinit")
  51
  52 /* Local prototypes */
  53 static void
  54 acpi_ut_fadt_register_error(char *register_name, u32 value, u8 offset);
  55
  56 static void acpi_ut_terminate(void);
  57
  58 /*******************************************************************************
  59  *
  60  * FUNCTION:    acpi_ut_fadt_register_error
  61  *
  62  * PARAMETERS:  register_name           - Pointer to string identifying register
  63  *              Value                   - Actual register contents value
  64  *              Offset                  - Byte offset in the FADT
  65  *
  66  * RETURN:      AE_BAD_VALUE
  67  *
  68  * DESCRIPTION: Display failure message
  69  *
  70  ******************************************************************************/
  71
  72 static void
  73 acpi_ut_fadt_register_error(char *register_name, u32 value, u8 offset)
  74 {
  75
  76         ACPI_WARNING((AE_INFO,
  77                       "Invalid FADT value %s=%X at offset %X in FADT=%p",
  78                       register_name, value, offset, &acpi_gbl_FADT));
  79 }
  80
  81 /******************************************************************************
  82  *
  83  * FUNCTION:    acpi_ut_validate_fadt
  84  *
  85  * PARAMETERS:  None
  86  *
  87  * RETURN:      Status
  88  *
  89  * DESCRIPTION: Validate various ACPI registers in the FADT
  90  *
  91  ******************************************************************************/
  92
  93 acpi_status acpi_ut_validate_fadt(void)
  94 {
  95
  96         /*
  97          * Verify Fixed ACPI Description Table fields,
  98          * but don't abort on any problems, just display error
  99          */
 100         if (acpi_gbl_FADT.pm1_event_length < 4) {
 101                 acpi_ut_fadt_register_error("PM1_EVT_LEN",
 102                                             (u32) acpi_gbl_FADT.
 103                                             pm1_event_length,
 104                                             ACPI_FADT_OFFSET(pm1_event_length));
 105         }
 106
 107         if (!acpi_gbl_FADT.pm1_control_length) {
 108                 acpi_ut_fadt_register_error("PM1_CNT_LEN", 0,
 109                                             ACPI_FADT_OFFSET
 110                                             (pm1_control_length));
 111         }
 112
 113         if (!acpi_gbl_FADT.xpm1a_event_block.address) {
 114                 acpi_ut_fadt_register_error("X_PM1a_EVT_BLK", 0,
 115                                             ACPI_FADT_OFFSET(xpm1a_event_block.
 116                                                              address));
 117         }
 118
 119         if (!acpi_gbl_FADT.xpm1a_control_block.address) {
 120                 acpi_ut_fadt_register_error("X_PM1a_CNT_BLK", 0,
 121                                             ACPI_FADT_OFFSET
 122                                             (xpm1a_control_block.address));
 123         }
 124
 125         if (!acpi_gbl_FADT.xpm_timer_block.address) {
 126                 acpi_ut_fadt_register_error("X_PM_TMR_BLK", 0,
 127                                             ACPI_FADT_OFFSET(xpm_timer_block.
 128                                                              address));
 129         }
 130
 131         if ((acpi_gbl_FADT.xpm2_control_block.address &&
 132              !acpi_gbl_FADT.pm2_control_length)) {
 133                 acpi_ut_fadt_register_error("PM2_CNT_LEN",
 134                                             (u32) acpi_gbl_FADT.
 135                                             pm2_control_length,
 136                                             ACPI_FADT_OFFSET
 137                                             (pm2_control_length));
 138         }
 139
 140         if (acpi_gbl_FADT.pm_timer_length < 4) {
 141                 acpi_ut_fadt_register_error("PM_TM_LEN",
 142                                             (u32) acpi_gbl_FADT.pm_timer_length,
 143                                             ACPI_FADT_OFFSET(pm_timer_length));
 144         }
 145
 146         /* Length of GPE blocks must be a multiple of 2 */
 147
 148         if (acpi_gbl_FADT.xgpe0_block.address &&
 149             (acpi_gbl_FADT.gpe0_block_length & 1)) {
 150                 acpi_ut_fadt_register_error("(x)GPE0_BLK_LEN",
 151                                             (u32) acpi_gbl_FADT.
 152                                             gpe0_block_length,
 153                                             ACPI_FADT_OFFSET
 154                                             (gpe0_block_length));
 155         }
 156
 157         if (acpi_gbl_FADT.xgpe1_block.address &&
 158             (acpi_gbl_FADT.gpe1_block_length & 1)) {
 159                 acpi_ut_fadt_register_error("(x)GPE1_BLK_LEN",
 160                                             (u32) acpi_gbl_FADT.
 161                                             gpe1_block_length,
 162                                             ACPI_FADT_OFFSET
 163                                             (gpe1_block_length));
 164         }
 165
 166         return (AE_OK);
 167 }
 168
 169 /******************************************************************************
 170  *
 171  * FUNCTION:    acpi_ut_terminate
 172  *
 173  * PARAMETERS:  none
 174  *
 175  * RETURN:      none
 176  *
 177  * DESCRIPTION: Free global memory
 178  *
 179  ******************************************************************************/
 180
 181 static void acpi_ut_terminate(void)
 182 {
 183         struct acpi_gpe_block_info *gpe_block;
 184         struct acpi_gpe_block_info *next_gpe_block;
 185         struct acpi_gpe_xrupt_info *gpe_xrupt_info;
 186         struct acpi_gpe_xrupt_info *next_gpe_xrupt_info;
 187
 188         ACPI_FUNCTION_TRACE(ut_terminate);
 189
 190         /* Free global GPE blocks and related info structures */
 191
 192         gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
 193         while (gpe_xrupt_info) {
 194                 gpe_block = gpe_xrupt_info->gpe_block_list_head;
 195                 while (gpe_block) {
 196                         next_gpe_block = gpe_block->next;
 197                         ACPI_FREE(gpe_block->event_info);
 198                         ACPI_FREE(gpe_block->register_info);
 199                         ACPI_FREE(gpe_block);
 200
 201                         gpe_block = next_gpe_block;
 202                 }
 203                 next_gpe_xrupt_info = gpe_xrupt_info->next;
 204                 ACPI_FREE(gpe_xrupt_info);
 205                 gpe_xrupt_info = next_gpe_xrupt_info;
 206         }
 207
 208         return_VOID;
 209 }
 210
 211 /*******************************************************************************
 212  *
 213  * FUNCTION:    acpi_ut_subsystem_shutdown
 214  *
 215  * PARAMETERS:  none
 216  *
 217  * RETURN:      none
 218  *
 219  * DESCRIPTION: Shutdown the various subsystems.  Don't delete the mutex
 220  *              objects here -- because the AML debugger may be still running.
 221  *
 222  ******************************************************************************/
 223
 224 void acpi_ut_subsystem_shutdown(void)
 225 {
 226
 227         ACPI_FUNCTION_TRACE(ut_subsystem_shutdown);
 228
 229         /* Just exit if subsystem is already shutdown */
 230
 231         if (acpi_gbl_shutdown) {
 232                 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
 233                 return_VOID;
 234         }
 235
 236         /* Subsystem appears active, go ahead and shut it down */
 237
 238         acpi_gbl_shutdown = TRUE;
 239         acpi_gbl_startup_flags = 0;
 240         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
 241
 242         /* Close the acpi_event Handling */
 243
 244         acpi_ev_terminate();
 245
 246         /* Close the Namespace */
 247
 248         acpi_ns_terminate();
 249
 250         /* Delete the ACPI tables */
 251
 252         acpi_tb_terminate();
 253
 254         /* Close the globals */
 255
 256         acpi_ut_terminate();
 257
 258         /* Purge the local caches */
 259
 260         (void)acpi_ut_delete_caches();
 261         return_VOID;
 262 }