1 /****************************************************************************** 2 * 3 * Module Name: utxfinit - External interfaces for ACPICA initialization 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2012, Intel Corp. 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 <linux/export.h> 45 #include <acpi/acpi.h> 46 #include "accommon.h" 47 #include "acevents.h" 48 #include "acnamesp.h" 49 #include "acdebug.h" 50 #include "actables.h" 51 52 #define _COMPONENT ACPI_UTILITIES 53 ACPI_MODULE_NAME("utxfinit") 54 55 /******************************************************************************* 56 * 57 * FUNCTION: acpi_initialize_subsystem 58 * 59 * PARAMETERS: None 60 * 61 * RETURN: Status 62 * 63 * DESCRIPTION: Initializes all global variables. This is the first function 64 * called, so any early initialization belongs here. 65 * 66 ******************************************************************************/ 67 acpi_status acpi_initialize_subsystem(void) 68 { 69 acpi_status status; 70 71 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem); 72 73 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE; 74 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace()); 75 76 /* Initialize the OS-Dependent layer */ 77 78 status = acpi_os_initialize(); 79 if (ACPI_FAILURE(status)) { 80 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization")); 81 return_ACPI_STATUS(status); 82 } 83 84 /* Initialize all globals used by the subsystem */ 85 86 status = acpi_ut_init_globals(); 87 if (ACPI_FAILURE(status)) { 88 ACPI_EXCEPTION((AE_INFO, status, 89 "During initialization of globals")); 90 return_ACPI_STATUS(status); 91 } 92 93 /* Create the default mutex objects */ 94 95 status = acpi_ut_mutex_initialize(); 96 if (ACPI_FAILURE(status)) { 97 ACPI_EXCEPTION((AE_INFO, status, 98 "During Global Mutex creation")); 99 return_ACPI_STATUS(status); 100 } 101 102 /* 103 * Initialize the namespace manager and 104 * the root of the namespace tree 105 */ 106 status = acpi_ns_root_initialize(); 107 if (ACPI_FAILURE(status)) { 108 ACPI_EXCEPTION((AE_INFO, status, 109 "During Namespace initialization")); 110 return_ACPI_STATUS(status); 111 } 112 113 /* Initialize the global OSI interfaces list with the static names */ 114 115 status = acpi_ut_initialize_interfaces(); 116 if (ACPI_FAILURE(status)) { 117 ACPI_EXCEPTION((AE_INFO, status, 118 "During OSI interfaces initialization")); 119 return_ACPI_STATUS(status); 120 } 121 122 /* If configured, initialize the AML debugger */ 123 124 ACPI_DEBUGGER_EXEC(status = acpi_db_initialize()); 125 return_ACPI_STATUS(status); 126 } 127 ACPI_EXPORT_SYMBOL(acpi_initialize_subsystem) 128 129 /******************************************************************************* 130 * 131 * FUNCTION: acpi_enable_subsystem 132 * 133 * PARAMETERS: flags - Init/enable Options 134 * 135 * RETURN: Status 136 * 137 * DESCRIPTION: Completes the subsystem initialization including hardware. 138 * Puts system into ACPI mode if it isn't already. 139 * 140 ******************************************************************************/ 141 acpi_status acpi_enable_subsystem(u32 flags) 142 { 143 acpi_status status = AE_OK; 144 145 ACPI_FUNCTION_TRACE(acpi_enable_subsystem); 146 147 #if (!ACPI_REDUCED_HARDWARE) 148 149 /* Enable ACPI mode */ 150 151 if (!(flags & ACPI_NO_ACPI_ENABLE)) { 152 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 153 "[Init] Going into ACPI mode\n")); 154 155 acpi_gbl_original_mode = acpi_hw_get_mode(); 156 157 status = acpi_enable(); 158 if (ACPI_FAILURE(status)) { 159 ACPI_WARNING((AE_INFO, "AcpiEnable failed")); 160 return_ACPI_STATUS(status); 161 } 162 } 163 164 /* 165 * Obtain a permanent mapping for the FACS. This is required for the 166 * Global Lock and the Firmware Waking Vector 167 */ 168 status = acpi_tb_initialize_facs(); 169 if (ACPI_FAILURE(status)) { 170 ACPI_WARNING((AE_INFO, "Could not map the FACS table")); 171 return_ACPI_STATUS(status); 172 } 173 #endif /* !ACPI_REDUCED_HARDWARE */ 174 175 /* 176 * Install the default op_region handlers. These are installed unless 177 * other handlers have already been installed via the 178 * install_address_space_handler interface. 179 */ 180 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 181 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 182 "[Init] Installing default address space handlers\n")); 183 184 status = acpi_ev_install_region_handlers(); 185 if (ACPI_FAILURE(status)) { 186 return_ACPI_STATUS(status); 187 } 188 } 189 #if (!ACPI_REDUCED_HARDWARE) 190 /* 191 * Initialize ACPI Event handling (Fixed and General Purpose) 192 * 193 * Note1: We must have the hardware and events initialized before we can 194 * execute any control methods safely. Any control method can require 195 * ACPI hardware support, so the hardware must be fully initialized before 196 * any method execution! 197 * 198 * Note2: Fixed events are initialized and enabled here. GPEs are 199 * initialized, but cannot be enabled until after the hardware is 200 * completely initialized (SCI and global_lock activated) and the various 201 * initialization control methods are run (_REG, _STA, _INI) on the 202 * entire namespace. 203 */ 204 if (!(flags & ACPI_NO_EVENT_INIT)) { 205 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 206 "[Init] Initializing ACPI events\n")); 207 208 status = acpi_ev_initialize_events(); 209 if (ACPI_FAILURE(status)) { 210 return_ACPI_STATUS(status); 211 } 212 } 213 214 /* 215 * Install the SCI handler and Global Lock handler. This completes the 216 * hardware initialization. 217 */ 218 if (!(flags & ACPI_NO_HANDLER_INIT)) { 219 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 220 "[Init] Installing SCI/GL handlers\n")); 221 222 status = acpi_ev_install_xrupt_handlers(); 223 if (ACPI_FAILURE(status)) { 224 return_ACPI_STATUS(status); 225 } 226 } 227 #endif /* !ACPI_REDUCED_HARDWARE */ 228 229 return_ACPI_STATUS(status); 230 } 231 ACPI_EXPORT_SYMBOL(acpi_enable_subsystem) 232 233 /******************************************************************************* 234 * 235 * FUNCTION: acpi_initialize_objects 236 * 237 * PARAMETERS: flags - Init/enable Options 238 * 239 * RETURN: Status 240 * 241 * DESCRIPTION: Completes namespace initialization by initializing device 242 * objects and executing AML code for Regions, buffers, etc. 243 * 244 ******************************************************************************/ 245 acpi_status acpi_initialize_objects(u32 flags) 246 { 247 acpi_status status = AE_OK; 248 249 ACPI_FUNCTION_TRACE(acpi_initialize_objects); 250 251 /* 252 * Run all _REG methods 253 * 254 * Note: Any objects accessed by the _REG methods will be automatically 255 * initialized, even if they contain executable AML (see the call to 256 * acpi_ns_initialize_objects below). 257 */ 258 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 259 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 260 "[Init] Executing _REG OpRegion methods\n")); 261 262 status = acpi_ev_initialize_op_regions(); 263 if (ACPI_FAILURE(status)) { 264 return_ACPI_STATUS(status); 265 } 266 } 267 268 /* 269 * Execute any module-level code that was detected during the table load 270 * phase. Although illegal since ACPI 2.0, there are many machines that 271 * contain this type of code. Each block of detected executable AML code 272 * outside of any control method is wrapped with a temporary control 273 * method object and placed on a global list. The methods on this list 274 * are executed below. 275 */ 276 acpi_ns_exec_module_code_list(); 277 278 /* 279 * Initialize the objects that remain uninitialized. This runs the 280 * executable AML that may be part of the declaration of these objects: 281 * operation_regions, buffer_fields, Buffers, and Packages. 282 */ 283 if (!(flags & ACPI_NO_OBJECT_INIT)) { 284 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 285 "[Init] Completing Initialization of ACPI Objects\n")); 286 287 status = acpi_ns_initialize_objects(); 288 if (ACPI_FAILURE(status)) { 289 return_ACPI_STATUS(status); 290 } 291 } 292 293 /* 294 * Initialize all device objects in the namespace. This runs the device 295 * _STA and _INI methods. 296 */ 297 if (!(flags & ACPI_NO_DEVICE_INIT)) { 298 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 299 "[Init] Initializing ACPI Devices\n")); 300 301 status = acpi_ns_initialize_devices(); 302 if (ACPI_FAILURE(status)) { 303 return_ACPI_STATUS(status); 304 } 305 } 306 307 /* 308 * Empty the caches (delete the cached objects) on the assumption that 309 * the table load filled them up more than they will be at runtime -- 310 * thus wasting non-paged memory. 311 */ 312 status = acpi_purge_cached_objects(); 313 314 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; 315 return_ACPI_STATUS(status); 316 } 317 ACPI_EXPORT_SYMBOL(acpi_initialize_objects) 318