1/****************************************************************************** 2 * 3 * Module Name: utxfinit - External interfaces for ACPICA initialization 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2017, 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 54ACPI_MODULE_NAME("utxfinit") 55 56/* For acpi_exec only */ 57void 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 72acpi_status ACPI_INIT_FUNCTION 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 130ACPI_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 ******************************************************************************/ 144acpi_status ACPI_INIT_FUNCTION 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#if (!ACPI_REDUCED_HARDWARE) 158 159 /* Enable ACPI mode */ 160 161 if (!(flags & ACPI_NO_ACPI_ENABLE)) { 162 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 163 "[Init] Going into ACPI mode\n")); 164 165 acpi_gbl_original_mode = acpi_hw_get_mode(); 166 167 status = acpi_enable(); 168 if (ACPI_FAILURE(status)) { 169 ACPI_WARNING((AE_INFO, "AcpiEnable failed")); 170 return_ACPI_STATUS(status); 171 } 172 } 173 174 /* 175 * Obtain a permanent mapping for the FACS. This is required for the 176 * Global Lock and the Firmware Waking Vector 177 */ 178 if (!(flags & ACPI_NO_FACS_INIT)) { 179 status = acpi_tb_initialize_facs(); 180 if (ACPI_FAILURE(status)) { 181 ACPI_WARNING((AE_INFO, "Could not map the FACS table")); 182 return_ACPI_STATUS(status); 183 } 184 } 185 186 /* 187 * Initialize ACPI Event handling (Fixed and General Purpose) 188 * 189 * Note1: We must have the hardware and events initialized before we can 190 * execute any control methods safely. Any control method can require 191 * ACPI hardware support, so the hardware must be fully initialized before 192 * any method execution! 193 * 194 * Note2: Fixed events are initialized and enabled here. GPEs are 195 * initialized, but cannot be enabled until after the hardware is 196 * completely initialized (SCI and global_lock activated) and the various 197 * initialization control methods are run (_REG, _STA, _INI) on the 198 * entire namespace. 199 */ 200 if (!(flags & ACPI_NO_EVENT_INIT)) { 201 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 202 "[Init] Initializing ACPI events\n")); 203 204 status = acpi_ev_initialize_events(); 205 if (ACPI_FAILURE(status)) { 206 return_ACPI_STATUS(status); 207 } 208 } 209 210 /* 211 * Install the SCI handler and Global Lock handler. This completes the 212 * hardware initialization. 213 */ 214 if (!(flags & ACPI_NO_HANDLER_INIT)) { 215 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 216 "[Init] Installing SCI/GL handlers\n")); 217 218 status = acpi_ev_install_xrupt_handlers(); 219 if (ACPI_FAILURE(status)) { 220 return_ACPI_STATUS(status); 221 } 222 } 223#endif /* !ACPI_REDUCED_HARDWARE */ 224 225 return_ACPI_STATUS(status); 226} 227 228ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem) 229 230/******************************************************************************* 231 * 232 * FUNCTION: acpi_initialize_objects 233 * 234 * PARAMETERS: flags - Init/enable Options 235 * 236 * RETURN: Status 237 * 238 * DESCRIPTION: Completes namespace initialization by initializing device 239 * objects and executing AML code for Regions, buffers, etc. 240 * 241 ******************************************************************************/ 242acpi_status ACPI_INIT_FUNCTION acpi_initialize_objects(u32 flags) 243{ 244 acpi_status status = AE_OK; 245 246 ACPI_FUNCTION_TRACE(acpi_initialize_objects); 247 248#ifdef ACPI_EXEC_APP 249 /* 250 * This call implements the "initialization file" option for acpi_exec. 251 * This is the precise point that we want to perform the overrides. 252 */ 253 ae_do_object_overrides(); 254#endif 255 256 /* 257 * Execute any module-level code that was detected during the table load 258 * phase. Although illegal since ACPI 2.0, there are many machines that 259 * contain this type of code. Each block of detected executable AML code 260 * outside of any control method is wrapped with a temporary control 261 * method object and placed on a global list. The methods on this list 262 * are executed below. 263 * 264 * This case executes the module-level code for all tables only after 265 * all of the tables have been loaded. It is a legacy option and is 266 * not compatible with other ACPI implementations. See acpi_ns_load_table. 267 */ 268 if (!acpi_gbl_parse_table_as_term_list 269 && acpi_gbl_group_module_level_code) { 270 acpi_ns_exec_module_code_list(); 271 272 /* 273 * Initialize the objects that remain uninitialized. This 274 * runs the executable AML that may be part of the 275 * declaration of these objects: 276 * operation_regions, buffer_fields, Buffers, and Packages. 277 */ 278 if (!(flags & ACPI_NO_OBJECT_INIT)) { 279 status = acpi_ns_initialize_objects(); 280 if (ACPI_FAILURE(status)) { 281 return_ACPI_STATUS(status); 282 } 283 } 284 } 285 286 /* 287 * Initialize all device/region objects in the namespace. This runs 288 * the device _STA and _INI methods and region _REG methods. 289 */ 290 if (!(flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) { 291 status = acpi_ns_initialize_devices(flags); 292 if (ACPI_FAILURE(status)) { 293 return_ACPI_STATUS(status); 294 } 295 } 296 297 /* 298 * Empty the caches (delete the cached objects) on the assumption that 299 * the table load filled them up more than they will be at runtime -- 300 * thus wasting non-paged memory. 301 */ 302 status = acpi_purge_cached_objects(); 303 304 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; 305 return_ACPI_STATUS(status); 306} 307 308ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects) 309