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
  48 #define _COMPONENT          ACPI_UTILITIES
  49 ACPI_MODULE_NAME("utinit")
  50
  51 /* Local prototypes */
  52 static void
  53 acpi_ut_fadt_register_error(char *register_name, u32 value, u8 offset);
  54
  55 static void acpi_ut_terminate(void);
  56
  57 /*******************************************************************************
  58  *
  59  * FUNCTION:    acpi_ut_fadt_register_error
  60  *
  61  * PARAMETERS:  register_name           - Pointer to string identifying register
  62  *              Value                   - Actual register contents value
  63  *              Offset                  - Byte offset in the FADT
  64  *
  65  * RETURN:      AE_BAD_VALUE
  66  *
  67  * DESCRIPTION: Display failure message
  68  *
  69  ******************************************************************************/
  70
  71 static void
  72 acpi_ut_fadt_register_error(char *register_name, u32 value, u8 offset)
  73 {
  74
  75         ACPI_WARNING((AE_INFO,
  76                       "Invalid FADT value %s=%X at offset %X FADT=%p",
  77                       register_name, value, offset, acpi_gbl_FADT));
  78 }
  79
  80 /******************************************************************************
  81  *
  82  * FUNCTION:    acpi_ut_validate_fadt
  83  *
  84  * PARAMETERS:  None
  85  *
  86  * RETURN:      Status
  87  *
  88  * DESCRIPTION: Validate various ACPI registers in the FADT
  89  *
  90  ******************************************************************************/
  91
  92 acpi_status acpi_ut_validate_fadt(void)
  93 {
  94
  95         /*
  96          * Verify Fixed ACPI Description Table fields,
  97          * but don't abort on any problems, just display error
  98          */
  99         if (acpi_gbl_FADT->pm1_evt_len < 4) {
 100                 acpi_ut_fadt_register_error("PM1_EVT_LEN",
 101                                             (u32) acpi_gbl_FADT->pm1_evt_len,
 102                                             ACPI_FADT_OFFSET(pm1_evt_len));
 103         }
 104
 105         if (!acpi_gbl_FADT->pm1_cnt_len) {
 106                 acpi_ut_fadt_register_error("PM1_CNT_LEN", 0,
 107                                             ACPI_FADT_OFFSET(pm1_cnt_len));
 108         }
 109
 110         if (!acpi_gbl_FADT->xpm1a_evt_blk.address) {
 111                 acpi_ut_fadt_register_error("X_PM1a_EVT_BLK", 0,
 112                                             ACPI_FADT_OFFSET(xpm1a_evt_blk.
 113                                                              address));
 114         }
 115
 116         if (!acpi_gbl_FADT->xpm1a_cnt_blk.address) {
 117                 acpi_ut_fadt_register_error("X_PM1a_CNT_BLK", 0,
 118                                             ACPI_FADT_OFFSET(xpm1a_cnt_blk.
 119                                                              address));
 120         }
 121
 122         if (!acpi_gbl_FADT->xpm_tmr_blk.address) {
 123                 acpi_ut_fadt_register_error("X_PM_TMR_BLK", 0,
 124                                             ACPI_FADT_OFFSET(xpm_tmr_blk.
 125                                                              address));
 126         }
 127
 128         if ((acpi_gbl_FADT->xpm2_cnt_blk.address &&
 129              !acpi_gbl_FADT->pm2_cnt_len)) {
 130                 acpi_ut_fadt_register_error("PM2_CNT_LEN",
 131                                             (u32) acpi_gbl_FADT->pm2_cnt_len,
 132                                             ACPI_FADT_OFFSET(pm2_cnt_len));
 133         }
 134
 135         if (acpi_gbl_FADT->pm_tm_len < 4) {
 136                 acpi_ut_fadt_register_error("PM_TM_LEN",
 137                                             (u32) acpi_gbl_FADT->pm_tm_len,
 138                                             ACPI_FADT_OFFSET(pm_tm_len));
 139         }
 140
 141         /* Length of GPE blocks must be a multiple of 2 */
 142
 143         if (acpi_gbl_FADT->xgpe0_blk.address &&
 144             (acpi_gbl_FADT->gpe0_blk_len & 1)) {
 145                 acpi_ut_fadt_register_error("(x)GPE0_BLK_LEN",
 146                                             (u32) acpi_gbl_FADT->gpe0_blk_len,
 147                                             ACPI_FADT_OFFSET(gpe0_blk_len));
 148         }
 149
 150         if (acpi_gbl_FADT->xgpe1_blk.address &&
 151             (acpi_gbl_FADT->gpe1_blk_len & 1)) {
 152                 acpi_ut_fadt_register_error("(x)GPE1_BLK_LEN",
 153                                             (u32) acpi_gbl_FADT->gpe1_blk_len,
 154                                             ACPI_FADT_OFFSET(gpe1_blk_len));
 155         }
 156
 157         return (AE_OK);
 158 }
 159
 160 /******************************************************************************
 161  *
 162  * FUNCTION:    acpi_ut_terminate
 163  *
 164  * PARAMETERS:  none
 165  *
 166  * RETURN:      none
 167  *
 168  * DESCRIPTION: Free global memory
 169  *
 170  ******************************************************************************/
 171
 172 static void acpi_ut_terminate(void)
 173 {
 174         struct acpi_gpe_block_info *gpe_block;
 175         struct acpi_gpe_block_info *next_gpe_block;
 176         struct acpi_gpe_xrupt_info *gpe_xrupt_info;
 177         struct acpi_gpe_xrupt_info *next_gpe_xrupt_info;
 178
 179         ACPI_FUNCTION_TRACE(ut_terminate);
 180
 181         /* Free global tables, etc. */
 182         /* Free global GPE blocks and related info structures */
 183
 184         gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
 185         while (gpe_xrupt_info) {
 186                 gpe_block = gpe_xrupt_info->gpe_block_list_head;
 187                 while (gpe_block) {
 188                         next_gpe_block = gpe_block->next;
 189                         ACPI_FREE(gpe_block->event_info);
 190                         ACPI_FREE(gpe_block->register_info);
 191                         ACPI_FREE(gpe_block);
 192
 193                         gpe_block = next_gpe_block;
 194                 }
 195                 next_gpe_xrupt_info = gpe_xrupt_info->next;
 196                 ACPI_FREE(gpe_xrupt_info);
 197                 gpe_xrupt_info = next_gpe_xrupt_info;
 198         }
 199
 200         return_VOID;
 201 }
 202
 203 /*******************************************************************************
 204  *
 205  * FUNCTION:    acpi_ut_subsystem_shutdown
 206  *
 207  * PARAMETERS:  none
 208  *
 209  * RETURN:      none
 210  *
 211  * DESCRIPTION: Shutdown the various subsystems.  Don't delete the mutex
 212  *              objects here -- because the AML debugger may be still running.
 213  *
 214  ******************************************************************************/
 215
 216 void acpi_ut_subsystem_shutdown(void)
 217 {
 218
 219         ACPI_FUNCTION_TRACE(ut_subsystem_shutdown);
 220
 221         /* Just exit if subsystem is already shutdown */
 222
 223         if (acpi_gbl_shutdown) {
 224                 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
 225                 return_VOID;
 226         }
 227
 228         /* Subsystem appears active, go ahead and shut it down */
 229
 230         acpi_gbl_shutdown = TRUE;
 231         acpi_gbl_startup_flags = 0;
 232         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
 233
 234         /* Close the acpi_event Handling */
 235
 236         acpi_ev_terminate();
 237
 238         /* Close the Namespace */
 239
 240         acpi_ns_terminate();
 241
 242         /* Close the globals */
 243
 244         acpi_ut_terminate();
 245
 246         /* Purge the local caches */
 247
 248         (void)acpi_ut_delete_caches();
 249         return_VOID;
 250 }