git.oblomov.eu 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 - 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/acnamesp.h>
  47 #include <acpi/acevents.h>
  48
  49 #define _COMPONENT          ACPI_UTILITIES
  50          ACPI_MODULE_NAME    ("utinit")
  51
  52 /* Local prototypes */
  53
  54 static void
  55 acpi_ut_fadt_register_error (
  56         char                            *register_name,
  57         u32                             value,
  58         acpi_size                       offset);
  59
  60 static void acpi_ut_terminate (
  61         void);
  62
  63
  64 /*******************************************************************************
  65  *
  66  * FUNCTION:    acpi_ut_fadt_register_error
  67  *
  68  * PARAMETERS:  register_name           - Pointer to string identifying register
  69  *              Value                   - Actual register contents value
  70  *              Offset                  - Byte offset in the FADT
  71  *
  72  * RETURN:      AE_BAD_VALUE
  73  *
  74  * DESCRIPTION: Display failure message
  75  *
  76  ******************************************************************************/
  77
  78 static void
  79 acpi_ut_fadt_register_error (
  80         char                            *register_name,
  81         u32                             value,
  82         acpi_size                       offset)
  83 {
  84
  85         ACPI_REPORT_WARNING (
  86                 ("Invalid FADT value %s=%X at offset %X FADT=%p\n",
  87                 register_name, value, (u32) offset, acpi_gbl_FADT));
  88 }
  89
  90
  91 /******************************************************************************
  92  *
  93  * FUNCTION:    acpi_ut_validate_fadt
  94  *
  95  * PARAMETERS:  None
  96  *
  97  * RETURN:      Status
  98  *
  99  * DESCRIPTION: Validate various ACPI registers in the FADT
 100  *
 101  ******************************************************************************/
 102
 103 acpi_status
 104 acpi_ut_validate_fadt (
 105         void)
 106 {
 107
 108         /*
 109          * Verify Fixed ACPI Description Table fields,
 110          * but don't abort on any problems, just display error
 111          */
 112         if (acpi_gbl_FADT->pm1_evt_len < 4) {
 113                 acpi_ut_fadt_register_error ("PM1_EVT_LEN",
 114                                   (u32) acpi_gbl_FADT->pm1_evt_len,
 115                                   ACPI_FADT_OFFSET (pm1_evt_len));
 116         }
 117
 118         if (!acpi_gbl_FADT->pm1_cnt_len) {
 119                 acpi_ut_fadt_register_error ("PM1_CNT_LEN", 0,
 120                                   ACPI_FADT_OFFSET (pm1_cnt_len));
 121         }
 122
 123         if (!acpi_gbl_FADT->xpm1a_evt_blk.address) {
 124                 acpi_ut_fadt_register_error ("X_PM1a_EVT_BLK", 0,
 125                                   ACPI_FADT_OFFSET (xpm1a_evt_blk.address));
 126         }
 127
 128         if (!acpi_gbl_FADT->xpm1a_cnt_blk.address) {
 129                 acpi_ut_fadt_register_error ("X_PM1a_CNT_BLK", 0,
 130                                   ACPI_FADT_OFFSET (xpm1a_cnt_blk.address));
 131         }
 132
 133         if (!acpi_gbl_FADT->xpm_tmr_blk.address) {
 134                 acpi_ut_fadt_register_error ("X_PM_TMR_BLK", 0,
 135                                   ACPI_FADT_OFFSET (xpm_tmr_blk.address));
 136         }
 137
 138         if ((acpi_gbl_FADT->xpm2_cnt_blk.address &&
 139                 !acpi_gbl_FADT->pm2_cnt_len)) {
 140                 acpi_ut_fadt_register_error ("PM2_CNT_LEN",
 141                                   (u32) acpi_gbl_FADT->pm2_cnt_len,
 142                                   ACPI_FADT_OFFSET (pm2_cnt_len));
 143         }
 144
 145         if (acpi_gbl_FADT->pm_tm_len < 4) {
 146                 acpi_ut_fadt_register_error ("PM_TM_LEN",
 147                                   (u32) acpi_gbl_FADT->pm_tm_len,
 148                                   ACPI_FADT_OFFSET (pm_tm_len));
 149         }
 150
 151         /* Length of GPE blocks must be a multiple of 2 */
 152
 153         if (acpi_gbl_FADT->xgpe0_blk.address &&
 154                 (acpi_gbl_FADT->gpe0_blk_len & 1)) {
 155                 acpi_ut_fadt_register_error ("(x)GPE0_BLK_LEN",
 156                                   (u32) acpi_gbl_FADT->gpe0_blk_len,
 157                                   ACPI_FADT_OFFSET (gpe0_blk_len));
 158         }
 159
 160         if (acpi_gbl_FADT->xgpe1_blk.address &&
 161                 (acpi_gbl_FADT->gpe1_blk_len & 1)) {
 162                 acpi_ut_fadt_register_error ("(x)GPE1_BLK_LEN",
 163                                   (u32) acpi_gbl_FADT->gpe1_blk_len,
 164                                   ACPI_FADT_OFFSET (gpe1_blk_len));
 165         }
 166
 167         return (AE_OK);
 168 }
 169
 170
 171 /******************************************************************************
 172  *
 173  * FUNCTION:    acpi_ut_terminate
 174  *
 175  * PARAMETERS:  none
 176  *
 177  * RETURN:      none
 178  *
 179  * DESCRIPTION: Free global memory
 180  *
 181  ******************************************************************************/
 182
 183 static void
 184 acpi_ut_terminate (
 185         void)
 186 {
 187         struct acpi_gpe_block_info      *gpe_block;
 188         struct acpi_gpe_block_info      *next_gpe_block;
 189         struct acpi_gpe_xrupt_info      *gpe_xrupt_info;
 190         struct acpi_gpe_xrupt_info      *next_gpe_xrupt_info;
 191
 192
 193         ACPI_FUNCTION_TRACE ("ut_terminate");
 194
 195
 196         /* Free global tables, etc. */
 197         /* Free global GPE blocks and related info structures */
 198
 199         gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
 200         while (gpe_xrupt_info) {
 201                 gpe_block = gpe_xrupt_info->gpe_block_list_head;
 202                 while (gpe_block) {
 203                         next_gpe_block = gpe_block->next;
 204                         ACPI_MEM_FREE (gpe_block->event_info);
 205                         ACPI_MEM_FREE (gpe_block->register_info);
 206                         ACPI_MEM_FREE (gpe_block);
 207
 208                         gpe_block = next_gpe_block;
 209                 }
 210                 next_gpe_xrupt_info = gpe_xrupt_info->next;
 211                 ACPI_MEM_FREE (gpe_xrupt_info);
 212                 gpe_xrupt_info = next_gpe_xrupt_info;
 213         }
 214
 215         return_VOID;
 216 }
 217
 218
 219 /*******************************************************************************
 220  *
 221  * FUNCTION:    acpi_ut_subsystem_shutdown
 222  *
 223  * PARAMETERS:  none
 224  *
 225  * RETURN:      none
 226  *
 227  * DESCRIPTION: Shutdown the various subsystems.  Don't delete the mutex
 228  *              objects here -- because the AML debugger may be still running.
 229  *
 230  ******************************************************************************/
 231
 232 void
 233 acpi_ut_subsystem_shutdown (
 234         void)
 235 {
 236
 237         ACPI_FUNCTION_TRACE ("ut_subsystem_shutdown");
 238
 239         /* Just exit if subsystem is already shutdown */
 240
 241         if (acpi_gbl_shutdown) {
 242                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
 243                         "ACPI Subsystem is already terminated\n"));
 244                 return_VOID;
 245         }
 246
 247         /* Subsystem appears active, go ahead and shut it down */
 248
 249         acpi_gbl_shutdown = TRUE;
 250         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 251                 "Shutting down ACPI Subsystem...\n"));
 252
 253         /* Close the acpi_event Handling */
 254
 255         acpi_ev_terminate ();
 256
 257         /* Close the Namespace */
 258
 259         acpi_ns_terminate ();
 260
 261         /* Close the globals */
 262
 263         acpi_ut_terminate ();
 264
 265         /* Purge the local caches */
 266
 267         (void) acpi_purge_cached_objects ();
 268
 269         /* Debug only - display leftover memory allocation, if any */
 270
 271 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 272         acpi_ut_dump_allocations (ACPI_UINT32_MAX, NULL);
 273 #endif
 274
 275         return_VOID;
 276 }
 277
 278