1 /****************************************************************************** 2 * 3 * Module Name: utxfinit - External interfaces for ACPICA initialization 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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 #define EXPORT_ACPI_INTERFACES 45 46 #include <acpi/acpi.h> 47 #include "accommon.h" 48 #include "acevents.h" 49 #include "acnamesp.h" 50 #include "acdebug.h" 51 #include "actables.h" 52 53 #define _COMPONENT ACPI_UTILITIES 54 ACPI_MODULE_NAME("utxfinit") 55 56 /* For acpi_exec only */ 57 void ae_do_object_overrides(void); 58 59 /******************************************************************************* 60 * 61 * FUNCTION: acpi_initialize_subsystem 62 * 63 * PARAMETERS: None 64 * 65 * RETURN: Status 66 * 67 * DESCRIPTION: Initializes all global variables. This is the first function 68 * called, so any early initialization belongs here. 69 * 70 ******************************************************************************/ 71 72 acpi_status __init acpi_initialize_subsystem(void) 73 { 74 acpi_status status; 75 76 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem); 77 78 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE; 79 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace()); 80 81 /* Initialize the OS-Dependent layer */ 82 83 status = acpi_os_initialize(); 84 if (ACPI_FAILURE(status)) { 85 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization")); 86 return_ACPI_STATUS(status); 87 } 88 89 /* Initialize all globals used by the subsystem */ 90 91 status = acpi_ut_init_globals(); 92 if (ACPI_FAILURE(status)) { 93 ACPI_EXCEPTION((AE_INFO, status, 94 "During initialization of globals")); 95 return_ACPI_STATUS(status); 96 } 97 98 /* Create the default mutex objects */ 99 100 status = acpi_ut_mutex_initialize(); 101 if (ACPI_FAILURE(status)) { 102 ACPI_EXCEPTION((AE_INFO, status, 103 "During Global Mutex creation")); 104 return_ACPI_STATUS(status); 105 } 106 107 /* 108 * Initialize the namespace manager and 109 * the root of the namespace tree 110 */ 111 status = acpi_ns_root_initialize(); 112 if (ACPI_FAILURE(status)) { 113 ACPI_EXCEPTION((AE_INFO, status, 114 "During Namespace initialization")); 115 return_ACPI_STATUS(status); 116 } 117 118 /* Initialize the global OSI interfaces list with the static names */ 119 120 status = acpi_ut_initialize_interfaces(); 121 if (ACPI_FAILURE(status)) { 122 ACPI_EXCEPTION((AE_INFO, status, 123 "During OSI interfaces initialization")); 124 return_ACPI_STATUS(status); 125 } 126 127 return_ACPI_STATUS(AE_OK); 128 } 129 130 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem) 131 132 /******************************************************************************* 133 * 134 * FUNCTION: acpi_enable_subsystem 135 * 136 * PARAMETERS: flags - Init/enable Options 137 * 138 * RETURN: Status 139 * 140 * DESCRIPTION: Completes the subsystem initialization including hardware. 141 * Puts system into ACPI mode if it isn't already. 142 * 143 ******************************************************************************/ 144 acpi_status __init acpi_enable_subsystem(u32 flags) 145 { 146 acpi_status status = AE_OK; 147 148 ACPI_FUNCTION_TRACE(acpi_enable_subsystem); 149 150 /* 151 * The early initialization phase is complete. The namespace is loaded, 152 * and we can now support address spaces other than Memory, I/O, and 153 * PCI_Config. 154 */ 155 acpi_gbl_early_initialization = FALSE; 156 157 /* 158 * Install the default operation region handlers. These are the 159 * handlers that are defined by the ACPI specification to be 160 * "always accessible" -- namely, system_memory, system_IO, and 161 * PCI_Config. This also means that no _REG methods need to be 162 * run for these address spaces. We need to have these handlers 163 * installed before any AML code can be executed, especially any 164 * module-level code (11/2015). 165 */ 166 status = acpi_ev_install_region_handlers(); 167 if (ACPI_FAILURE(status)) { 168 ACPI_EXCEPTION((AE_INFO, status, 169 "During Region initialization")); 170 return_ACPI_STATUS(status); 171 } 172 #if (!ACPI_REDUCED_HARDWARE) 173 174 /* Enable ACPI mode */ 175 176 if (!(flags & ACPI_NO_ACPI_ENABLE)) { 177 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 178 "[Init] Going into ACPI mode\n")); 179 180 acpi_gbl_original_mode = acpi_hw_get_mode(); 181 182 status = acpi_enable(); 183 if (ACPI_FAILURE(status)) { 184 ACPI_WARNING((AE_INFO, "AcpiEnable failed")); 185 return_ACPI_STATUS(status); 186 } 187 } 188 189 /* 190 * Obtain a permanent mapping for the FACS. This is required for the 191 * Global Lock and the Firmware Waking Vector 192 */ 193 if (!(flags & ACPI_NO_FACS_INIT)) { 194 status = acpi_tb_initialize_facs(); 195 if (ACPI_FAILURE(status)) { 196 ACPI_WARNING((AE_INFO, "Could not map the FACS table")); 197 return_ACPI_STATUS(status); 198 } 199 } 200 201 /* 202 * Initialize ACPI Event handling (Fixed and General Purpose) 203 * 204 * Note1: We must have the hardware and events initialized before we can 205 * execute any control methods safely. Any control method can require 206 * ACPI hardware support, so the hardware must be fully initialized before 207 * any method execution! 208 * 209 * Note2: Fixed events are initialized and enabled here. GPEs are 210 * initialized, but cannot be enabled until after the hardware is 211 * completely initialized (SCI and global_lock activated) and the various 212 * initialization control methods are run (_REG, _STA, _INI) on the 213 * entire namespace. 214 */ 215 if (!(flags & ACPI_NO_EVENT_INIT)) { 216 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 217 "[Init] Initializing ACPI events\n")); 218 219 status = acpi_ev_initialize_events(); 220 if (ACPI_FAILURE(status)) { 221 return_ACPI_STATUS(status); 222 } 223 } 224 225 /* 226 * Install the SCI handler and Global Lock handler. This completes the 227 * hardware initialization. 228 */ 229 if (!(flags & ACPI_NO_HANDLER_INIT)) { 230 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 231 "[Init] Installing SCI/GL handlers\n")); 232 233 status = acpi_ev_install_xrupt_handlers(); 234 if (ACPI_FAILURE(status)) { 235 return_ACPI_STATUS(status); 236 } 237 } 238 #endif /* !ACPI_REDUCED_HARDWARE */ 239 240 return_ACPI_STATUS(status); 241 } 242 243 ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem) 244 245 /******************************************************************************* 246 * 247 * FUNCTION: acpi_initialize_objects 248 * 249 * PARAMETERS: flags - Init/enable Options 250 * 251 * RETURN: Status 252 * 253 * DESCRIPTION: Completes namespace initialization by initializing device 254 * objects and executing AML code for Regions, buffers, etc. 255 * 256 ******************************************************************************/ 257 acpi_status __init acpi_initialize_objects(u32 flags) 258 { 259 acpi_status status = AE_OK; 260 261 ACPI_FUNCTION_TRACE(acpi_initialize_objects); 262 263 /* 264 * Run all _REG methods 265 * 266 * Note: Any objects accessed by the _REG methods will be automatically 267 * initialized, even if they contain executable AML (see the call to 268 * acpi_ns_initialize_objects below). 269 */ 270 acpi_gbl_reg_methods_enabled = TRUE; 271 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 272 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 273 "[Init] Executing _REG OpRegion methods\n")); 274 275 status = acpi_ev_initialize_op_regions(); 276 if (ACPI_FAILURE(status)) { 277 return_ACPI_STATUS(status); 278 } 279 } 280 #ifdef ACPI_EXEC_APP 281 /* 282 * This call implements the "initialization file" option for acpi_exec. 283 * This is the precise point that we want to perform the overrides. 284 */ 285 ae_do_object_overrides(); 286 #endif 287 288 /* 289 * Execute any module-level code that was detected during the table load 290 * phase. Although illegal since ACPI 2.0, there are many machines that 291 * contain this type of code. Each block of detected executable AML code 292 * outside of any control method is wrapped with a temporary control 293 * method object and placed on a global list. The methods on this list 294 * are executed below. 295 * 296 * This case executes the module-level code for all tables only after 297 * all of the tables have been loaded. It is a legacy option and is 298 * not compatible with other ACPI implementations. See acpi_ns_load_table. 299 */ 300 if (acpi_gbl_group_module_level_code) { 301 acpi_ns_exec_module_code_list(); 302 } 303 304 /* 305 * Initialize the objects that remain uninitialized. This runs the 306 * executable AML that may be part of the declaration of these objects: 307 * operation_regions, buffer_fields, Buffers, and Packages. 308 */ 309 if (!(flags & ACPI_NO_OBJECT_INIT)) { 310 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 311 "[Init] Completing Initialization of ACPI Objects\n")); 312 313 status = acpi_ns_initialize_objects(); 314 if (ACPI_FAILURE(status)) { 315 return_ACPI_STATUS(status); 316 } 317 } 318 319 /* 320 * Initialize all device objects in the namespace. This runs the device 321 * _STA and _INI methods. 322 */ 323 if (!(flags & ACPI_NO_DEVICE_INIT)) { 324 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 325 "[Init] Initializing ACPI Devices\n")); 326 327 status = acpi_ns_initialize_devices(); 328 if (ACPI_FAILURE(status)) { 329 return_ACPI_STATUS(status); 330 } 331 } 332 333 /* 334 * Empty the caches (delete the cached objects) on the assumption that 335 * the table load filled them up more than they will be at runtime -- 336 * thus wasting non-paged memory. 337 */ 338 status = acpi_purge_cached_objects(); 339 340 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; 341 return_ACPI_STATUS(status); 342 } 343 344 ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects) 345