195b482a8SLen Brown /****************************************************************************** 295b482a8SLen Brown * 395b482a8SLen Brown * Module Name: utxface - External interfaces for "global" ACPI functions 495b482a8SLen Brown * 595b482a8SLen Brown *****************************************************************************/ 695b482a8SLen Brown 795b482a8SLen Brown /* 895b482a8SLen Brown * Copyright (C) 2000 - 2008, Intel Corp. 995b482a8SLen Brown * All rights reserved. 1095b482a8SLen Brown * 1195b482a8SLen Brown * Redistribution and use in source and binary forms, with or without 1295b482a8SLen Brown * modification, are permitted provided that the following conditions 1395b482a8SLen Brown * are met: 1495b482a8SLen Brown * 1. Redistributions of source code must retain the above copyright 1595b482a8SLen Brown * notice, this list of conditions, and the following disclaimer, 1695b482a8SLen Brown * without modification. 1795b482a8SLen Brown * 2. Redistributions in binary form must reproduce at minimum a disclaimer 1895b482a8SLen Brown * substantially similar to the "NO WARRANTY" disclaimer below 1995b482a8SLen Brown * ("Disclaimer") and any redistribution must be conditioned upon 2095b482a8SLen Brown * including a substantially similar Disclaimer requirement for further 2195b482a8SLen Brown * binary redistribution. 2295b482a8SLen Brown * 3. Neither the names of the above-listed copyright holders nor the names 2395b482a8SLen Brown * of any contributors may be used to endorse or promote products derived 2495b482a8SLen Brown * from this software without specific prior written permission. 2595b482a8SLen Brown * 2695b482a8SLen Brown * Alternatively, this software may be distributed under the terms of the 2795b482a8SLen Brown * GNU General Public License ("GPL") version 2 as published by the Free 2895b482a8SLen Brown * Software Foundation. 2995b482a8SLen Brown * 3095b482a8SLen Brown * NO WARRANTY 3195b482a8SLen Brown * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 3295b482a8SLen Brown * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3395b482a8SLen Brown * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 3495b482a8SLen Brown * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3595b482a8SLen Brown * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3695b482a8SLen Brown * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3795b482a8SLen Brown * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3895b482a8SLen Brown * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 3995b482a8SLen Brown * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 4095b482a8SLen Brown * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 4195b482a8SLen Brown * POSSIBILITY OF SUCH DAMAGES. 4295b482a8SLen Brown */ 4395b482a8SLen Brown 4495b482a8SLen Brown #include <acpi/acpi.h> 45e2f7a777SLen Brown #include "accommon.h" 46e2f7a777SLen Brown #include "acevents.h" 47e2f7a777SLen Brown #include "acnamesp.h" 48e2f7a777SLen Brown #include "acdebug.h" 49e2f7a777SLen Brown #include "actables.h" 5095b482a8SLen Brown 5195b482a8SLen Brown #define _COMPONENT ACPI_UTILITIES 5295b482a8SLen Brown ACPI_MODULE_NAME("utxface") 5395b482a8SLen Brown 5495b482a8SLen Brown #ifndef ACPI_ASL_COMPILER 5595b482a8SLen Brown /******************************************************************************* 5695b482a8SLen Brown * 5795b482a8SLen Brown * FUNCTION: acpi_initialize_subsystem 5895b482a8SLen Brown * 5995b482a8SLen Brown * PARAMETERS: None 6095b482a8SLen Brown * 6195b482a8SLen Brown * RETURN: Status 6295b482a8SLen Brown * 6395b482a8SLen Brown * DESCRIPTION: Initializes all global variables. This is the first function 6495b482a8SLen Brown * called, so any early initialization belongs here. 6595b482a8SLen Brown * 6695b482a8SLen Brown ******************************************************************************/ 6795b482a8SLen Brown acpi_status __init acpi_initialize_subsystem(void) 6895b482a8SLen Brown { 6995b482a8SLen Brown acpi_status status; 7095b482a8SLen Brown 7195b482a8SLen Brown ACPI_FUNCTION_TRACE(acpi_initialize_subsystem); 7295b482a8SLen Brown 7395b482a8SLen Brown acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE; 7495b482a8SLen Brown ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace()); 7595b482a8SLen Brown 7695b482a8SLen Brown /* Initialize the OS-Dependent layer */ 7795b482a8SLen Brown 7895b482a8SLen Brown status = acpi_os_initialize(); 7995b482a8SLen Brown if (ACPI_FAILURE(status)) { 8095b482a8SLen Brown ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization")); 8195b482a8SLen Brown return_ACPI_STATUS(status); 8295b482a8SLen Brown } 8395b482a8SLen Brown 8495b482a8SLen Brown /* Initialize all globals used by the subsystem */ 8595b482a8SLen Brown 8695b482a8SLen Brown status = acpi_ut_init_globals(); 8795b482a8SLen Brown if (ACPI_FAILURE(status)) { 8895b482a8SLen Brown ACPI_EXCEPTION((AE_INFO, status, 8995b482a8SLen Brown "During initialization of globals")); 9095b482a8SLen Brown return_ACPI_STATUS(status); 9195b482a8SLen Brown } 9295b482a8SLen Brown 9395b482a8SLen Brown /* Create the default mutex objects */ 9495b482a8SLen Brown 9595b482a8SLen Brown status = acpi_ut_mutex_initialize(); 9695b482a8SLen Brown if (ACPI_FAILURE(status)) { 9795b482a8SLen Brown ACPI_EXCEPTION((AE_INFO, status, 9895b482a8SLen Brown "During Global Mutex creation")); 9995b482a8SLen Brown return_ACPI_STATUS(status); 10095b482a8SLen Brown } 10195b482a8SLen Brown 10295b482a8SLen Brown /* 10395b482a8SLen Brown * Initialize the namespace manager and 10495b482a8SLen Brown * the root of the namespace tree 10595b482a8SLen Brown */ 10695b482a8SLen Brown status = acpi_ns_root_initialize(); 10795b482a8SLen Brown if (ACPI_FAILURE(status)) { 10895b482a8SLen Brown ACPI_EXCEPTION((AE_INFO, status, 10995b482a8SLen Brown "During Namespace initialization")); 11095b482a8SLen Brown return_ACPI_STATUS(status); 11195b482a8SLen Brown } 11295b482a8SLen Brown 11395b482a8SLen Brown /* If configured, initialize the AML debugger */ 11495b482a8SLen Brown 11595b482a8SLen Brown ACPI_DEBUGGER_EXEC(status = acpi_db_initialize()); 11695b482a8SLen Brown return_ACPI_STATUS(status); 11795b482a8SLen Brown } 11895b482a8SLen Brown 11995b482a8SLen Brown /******************************************************************************* 12095b482a8SLen Brown * 12195b482a8SLen Brown * FUNCTION: acpi_enable_subsystem 12295b482a8SLen Brown * 12395b482a8SLen Brown * PARAMETERS: Flags - Init/enable Options 12495b482a8SLen Brown * 12595b482a8SLen Brown * RETURN: Status 12695b482a8SLen Brown * 12795b482a8SLen Brown * DESCRIPTION: Completes the subsystem initialization including hardware. 12895b482a8SLen Brown * Puts system into ACPI mode if it isn't already. 12995b482a8SLen Brown * 13095b482a8SLen Brown ******************************************************************************/ 13195b482a8SLen Brown acpi_status acpi_enable_subsystem(u32 flags) 13295b482a8SLen Brown { 13395b482a8SLen Brown acpi_status status = AE_OK; 13495b482a8SLen Brown 13595b482a8SLen Brown ACPI_FUNCTION_TRACE(acpi_enable_subsystem); 13695b482a8SLen Brown 13795b482a8SLen Brown /* Enable ACPI mode */ 13895b482a8SLen Brown 13995b482a8SLen Brown if (!(flags & ACPI_NO_ACPI_ENABLE)) { 14095b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 14195b482a8SLen Brown "[Init] Going into ACPI mode\n")); 14295b482a8SLen Brown 14395b482a8SLen Brown acpi_gbl_original_mode = acpi_hw_get_mode(); 14495b482a8SLen Brown 14595b482a8SLen Brown status = acpi_enable(); 14695b482a8SLen Brown if (ACPI_FAILURE(status)) { 14795b482a8SLen Brown ACPI_WARNING((AE_INFO, "AcpiEnable failed")); 14895b482a8SLen Brown return_ACPI_STATUS(status); 14995b482a8SLen Brown } 15095b482a8SLen Brown } 15195b482a8SLen Brown 15295b482a8SLen Brown /* 15395b482a8SLen Brown * Obtain a permanent mapping for the FACS. This is required for the 15495b482a8SLen Brown * Global Lock and the Firmware Waking Vector 15595b482a8SLen Brown */ 15695b482a8SLen Brown status = acpi_tb_initialize_facs(); 15795b482a8SLen Brown if (ACPI_FAILURE(status)) { 15895b482a8SLen Brown ACPI_WARNING((AE_INFO, "Could not map the FACS table")); 15995b482a8SLen Brown return_ACPI_STATUS(status); 16095b482a8SLen Brown } 16195b482a8SLen Brown 16295b482a8SLen Brown /* 16395b482a8SLen Brown * Install the default op_region handlers. These are installed unless 16495b482a8SLen Brown * other handlers have already been installed via the 16595b482a8SLen Brown * install_address_space_handler interface. 16695b482a8SLen Brown */ 16795b482a8SLen Brown if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 16895b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 16995b482a8SLen Brown "[Init] Installing default address space handlers\n")); 17095b482a8SLen Brown 17195b482a8SLen Brown status = acpi_ev_install_region_handlers(); 17295b482a8SLen Brown if (ACPI_FAILURE(status)) { 17395b482a8SLen Brown return_ACPI_STATUS(status); 17495b482a8SLen Brown } 17595b482a8SLen Brown } 17695b482a8SLen Brown 17795b482a8SLen Brown /* 17895b482a8SLen Brown * Initialize ACPI Event handling (Fixed and General Purpose) 17995b482a8SLen Brown * 18095b482a8SLen Brown * Note1: We must have the hardware and events initialized before we can 18195b482a8SLen Brown * execute any control methods safely. Any control method can require 18295b482a8SLen Brown * ACPI hardware support, so the hardware must be fully initialized before 18395b482a8SLen Brown * any method execution! 18495b482a8SLen Brown * 18595b482a8SLen Brown * Note2: Fixed events are initialized and enabled here. GPEs are 18695b482a8SLen Brown * initialized, but cannot be enabled until after the hardware is 18795b482a8SLen Brown * completely initialized (SCI and global_lock activated) 18895b482a8SLen Brown */ 18995b482a8SLen Brown if (!(flags & ACPI_NO_EVENT_INIT)) { 19095b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 19195b482a8SLen Brown "[Init] Initializing ACPI events\n")); 19295b482a8SLen Brown 19395b482a8SLen Brown status = acpi_ev_initialize_events(); 19495b482a8SLen Brown if (ACPI_FAILURE(status)) { 19595b482a8SLen Brown return_ACPI_STATUS(status); 19695b482a8SLen Brown } 19795b482a8SLen Brown } 19895b482a8SLen Brown 19995b482a8SLen Brown /* 20095b482a8SLen Brown * Install the SCI handler and Global Lock handler. This completes the 20195b482a8SLen Brown * hardware initialization. 20295b482a8SLen Brown */ 20395b482a8SLen Brown if (!(flags & ACPI_NO_HANDLER_INIT)) { 20495b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 20595b482a8SLen Brown "[Init] Installing SCI/GL handlers\n")); 20695b482a8SLen Brown 20795b482a8SLen Brown status = acpi_ev_install_xrupt_handlers(); 20895b482a8SLen Brown if (ACPI_FAILURE(status)) { 20995b482a8SLen Brown return_ACPI_STATUS(status); 21095b482a8SLen Brown } 21195b482a8SLen Brown } 21295b482a8SLen Brown 21395b482a8SLen Brown return_ACPI_STATUS(status); 21495b482a8SLen Brown } 21595b482a8SLen Brown 21695b482a8SLen Brown ACPI_EXPORT_SYMBOL(acpi_enable_subsystem) 21795b482a8SLen Brown 21895b482a8SLen Brown /******************************************************************************* 21995b482a8SLen Brown * 22095b482a8SLen Brown * FUNCTION: acpi_initialize_objects 22195b482a8SLen Brown * 22295b482a8SLen Brown * PARAMETERS: Flags - Init/enable Options 22395b482a8SLen Brown * 22495b482a8SLen Brown * RETURN: Status 22595b482a8SLen Brown * 22695b482a8SLen Brown * DESCRIPTION: Completes namespace initialization by initializing device 22795b482a8SLen Brown * objects and executing AML code for Regions, buffers, etc. 22895b482a8SLen Brown * 22995b482a8SLen Brown ******************************************************************************/ 23095b482a8SLen Brown acpi_status acpi_initialize_objects(u32 flags) 23195b482a8SLen Brown { 23295b482a8SLen Brown acpi_status status = AE_OK; 23395b482a8SLen Brown 23495b482a8SLen Brown ACPI_FUNCTION_TRACE(acpi_initialize_objects); 23595b482a8SLen Brown 23695b482a8SLen Brown /* 23795b482a8SLen Brown * Run all _REG methods 23895b482a8SLen Brown * 23995b482a8SLen Brown * Note: Any objects accessed by the _REG methods will be automatically 24095b482a8SLen Brown * initialized, even if they contain executable AML (see the call to 24195b482a8SLen Brown * acpi_ns_initialize_objects below). 24295b482a8SLen Brown */ 24395b482a8SLen Brown if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { 24495b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 24595b482a8SLen Brown "[Init] Executing _REG OpRegion methods\n")); 24695b482a8SLen Brown 24795b482a8SLen Brown status = acpi_ev_initialize_op_regions(); 24895b482a8SLen Brown if (ACPI_FAILURE(status)) { 24995b482a8SLen Brown return_ACPI_STATUS(status); 25095b482a8SLen Brown } 25195b482a8SLen Brown } 25295b482a8SLen Brown 25395b482a8SLen Brown /* 2547f0c826aSLin Ming * Execute any module-level code that was detected during the table load 2557f0c826aSLin Ming * phase. Although illegal since ACPI 2.0, there are many machines that 2567f0c826aSLin Ming * contain this type of code. Each block of detected executable AML code 2577f0c826aSLin Ming * outside of any control method is wrapped with a temporary control 2587f0c826aSLin Ming * method object and placed on a global list. The methods on this list 2597f0c826aSLin Ming * are executed below. 2607f0c826aSLin Ming */ 2617f0c826aSLin Ming acpi_ns_exec_module_code_list(); 2627f0c826aSLin Ming 2637f0c826aSLin Ming /* 26495b482a8SLen Brown * Initialize the objects that remain uninitialized. This runs the 26595b482a8SLen Brown * executable AML that may be part of the declaration of these objects: 26695b482a8SLen Brown * operation_regions, buffer_fields, Buffers, and Packages. 26795b482a8SLen Brown */ 26895b482a8SLen Brown if (!(flags & ACPI_NO_OBJECT_INIT)) { 26995b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 27095b482a8SLen Brown "[Init] Completing Initialization of ACPI Objects\n")); 27195b482a8SLen Brown 27295b482a8SLen Brown status = acpi_ns_initialize_objects(); 27395b482a8SLen Brown if (ACPI_FAILURE(status)) { 27495b482a8SLen Brown return_ACPI_STATUS(status); 27595b482a8SLen Brown } 27695b482a8SLen Brown } 27795b482a8SLen Brown 27895b482a8SLen Brown /* 27995b482a8SLen Brown * Initialize all device objects in the namespace. This runs the device 28095b482a8SLen Brown * _STA and _INI methods. 28195b482a8SLen Brown */ 28295b482a8SLen Brown if (!(flags & ACPI_NO_DEVICE_INIT)) { 28395b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 28495b482a8SLen Brown "[Init] Initializing ACPI Devices\n")); 28595b482a8SLen Brown 28695b482a8SLen Brown status = acpi_ns_initialize_devices(); 28795b482a8SLen Brown if (ACPI_FAILURE(status)) { 28895b482a8SLen Brown return_ACPI_STATUS(status); 28995b482a8SLen Brown } 29095b482a8SLen Brown } 29195b482a8SLen Brown 29295b482a8SLen Brown /* 29395b482a8SLen Brown * Complete the GPE initialization for the GPE blocks defined in the FADT 29495b482a8SLen Brown * (GPE block 0 and 1). 29595b482a8SLen Brown * 29695b482a8SLen Brown * Note1: This is where the _PRW methods are executed for the GPEs. These 29795b482a8SLen Brown * methods can only be executed after the SCI and Global Lock handlers are 29895b482a8SLen Brown * installed and initialized. 29995b482a8SLen Brown * 30095b482a8SLen Brown * Note2: Currently, there seems to be no need to run the _REG methods 30195b482a8SLen Brown * before execution of the _PRW methods and enabling of the GPEs. 30295b482a8SLen Brown */ 30395b482a8SLen Brown if (!(flags & ACPI_NO_EVENT_INIT)) { 30495b482a8SLen Brown status = acpi_ev_install_fadt_gpes(); 30595b482a8SLen Brown if (ACPI_FAILURE(status)) 30695b482a8SLen Brown return (status); 30795b482a8SLen Brown } 30895b482a8SLen Brown 30995b482a8SLen Brown /* 31095b482a8SLen Brown * Empty the caches (delete the cached objects) on the assumption that 31195b482a8SLen Brown * the table load filled them up more than they will be at runtime -- 31295b482a8SLen Brown * thus wasting non-paged memory. 31395b482a8SLen Brown */ 31495b482a8SLen Brown status = acpi_purge_cached_objects(); 31595b482a8SLen Brown 31695b482a8SLen Brown acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; 31795b482a8SLen Brown return_ACPI_STATUS(status); 31895b482a8SLen Brown } 31995b482a8SLen Brown 32095b482a8SLen Brown ACPI_EXPORT_SYMBOL(acpi_initialize_objects) 32195b482a8SLen Brown 32295b482a8SLen Brown #endif 32395b482a8SLen Brown /******************************************************************************* 32495b482a8SLen Brown * 32595b482a8SLen Brown * FUNCTION: acpi_terminate 32695b482a8SLen Brown * 32795b482a8SLen Brown * PARAMETERS: None 32895b482a8SLen Brown * 32995b482a8SLen Brown * RETURN: Status 33095b482a8SLen Brown * 3312f977b36SBob Moore * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources. 33295b482a8SLen Brown * 33395b482a8SLen Brown ******************************************************************************/ 33495b482a8SLen Brown acpi_status acpi_terminate(void) 33595b482a8SLen Brown { 33695b482a8SLen Brown acpi_status status; 33795b482a8SLen Brown 33895b482a8SLen Brown ACPI_FUNCTION_TRACE(acpi_terminate); 33995b482a8SLen Brown 3402f977b36SBob Moore /* Just exit if subsystem is already shutdown */ 3412f977b36SBob Moore 3422f977b36SBob Moore if (acpi_gbl_shutdown) { 3432f977b36SBob Moore ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated")); 3442f977b36SBob Moore return_ACPI_STATUS(AE_OK); 3452f977b36SBob Moore } 3462f977b36SBob Moore 3472f977b36SBob Moore /* Subsystem appears active, go ahead and shut it down */ 3482f977b36SBob Moore 3492f977b36SBob Moore acpi_gbl_shutdown = TRUE; 3502f977b36SBob Moore acpi_gbl_startup_flags = 0; 3512f977b36SBob Moore ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n")); 3522f977b36SBob Moore 35395b482a8SLen Brown /* Terminate the AML Debugger if present */ 35495b482a8SLen Brown 35595b482a8SLen Brown ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE); 35695b482a8SLen Brown 35795b482a8SLen Brown /* Shutdown and free all resources */ 35895b482a8SLen Brown 35995b482a8SLen Brown acpi_ut_subsystem_shutdown(); 36095b482a8SLen Brown 36195b482a8SLen Brown /* Free the mutex objects */ 36295b482a8SLen Brown 36395b482a8SLen Brown acpi_ut_mutex_terminate(); 36495b482a8SLen Brown 36595b482a8SLen Brown #ifdef ACPI_DEBUGGER 36695b482a8SLen Brown 36795b482a8SLen Brown /* Shut down the debugger */ 36895b482a8SLen Brown 36995b482a8SLen Brown acpi_db_terminate(); 37095b482a8SLen Brown #endif 37195b482a8SLen Brown 37295b482a8SLen Brown /* Now we can shutdown the OS-dependent layer */ 37395b482a8SLen Brown 37495b482a8SLen Brown status = acpi_os_terminate(); 37595b482a8SLen Brown return_ACPI_STATUS(status); 37695b482a8SLen Brown } 37795b482a8SLen Brown 37895b482a8SLen Brown ACPI_EXPORT_SYMBOL(acpi_terminate) 3792f977b36SBob Moore 38095b482a8SLen Brown #ifndef ACPI_ASL_COMPILER 38195b482a8SLen Brown #ifdef ACPI_FUTURE_USAGE 38295b482a8SLen Brown /******************************************************************************* 38395b482a8SLen Brown * 38495b482a8SLen Brown * FUNCTION: acpi_subsystem_status 38595b482a8SLen Brown * 38695b482a8SLen Brown * PARAMETERS: None 38795b482a8SLen Brown * 38895b482a8SLen Brown * RETURN: Status of the ACPI subsystem 38995b482a8SLen Brown * 39095b482a8SLen Brown * DESCRIPTION: Other drivers that use the ACPI subsystem should call this 39195b482a8SLen Brown * before making any other calls, to ensure the subsystem 39295b482a8SLen Brown * initialized successfully. 39395b482a8SLen Brown * 39495b482a8SLen Brown ******************************************************************************/ 39595b482a8SLen Brown acpi_status acpi_subsystem_status(void) 39695b482a8SLen Brown { 39795b482a8SLen Brown 39895b482a8SLen Brown if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) { 39995b482a8SLen Brown return (AE_OK); 40095b482a8SLen Brown } else { 40195b482a8SLen Brown return (AE_ERROR); 40295b482a8SLen Brown } 40395b482a8SLen Brown } 40495b482a8SLen Brown 40595b482a8SLen Brown ACPI_EXPORT_SYMBOL(acpi_subsystem_status) 40695b482a8SLen Brown 40795b482a8SLen Brown /******************************************************************************* 40895b482a8SLen Brown * 40995b482a8SLen Brown * FUNCTION: acpi_get_system_info 41095b482a8SLen Brown * 41195b482a8SLen Brown * PARAMETERS: out_buffer - A buffer to receive the resources for the 41295b482a8SLen Brown * device 41395b482a8SLen Brown * 41495b482a8SLen Brown * RETURN: Status - the status of the call 41595b482a8SLen Brown * 41695b482a8SLen Brown * DESCRIPTION: This function is called to get information about the current 41795b482a8SLen Brown * state of the ACPI subsystem. It will return system information 41895b482a8SLen Brown * in the out_buffer. 41995b482a8SLen Brown * 42095b482a8SLen Brown * If the function fails an appropriate status will be returned 42195b482a8SLen Brown * and the value of out_buffer is undefined. 42295b482a8SLen Brown * 42395b482a8SLen Brown ******************************************************************************/ 42495b482a8SLen Brown acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer) 42595b482a8SLen Brown { 42695b482a8SLen Brown struct acpi_system_info *info_ptr; 42795b482a8SLen Brown acpi_status status; 42895b482a8SLen Brown 42995b482a8SLen Brown ACPI_FUNCTION_TRACE(acpi_get_system_info); 43095b482a8SLen Brown 43195b482a8SLen Brown /* Parameter validation */ 43295b482a8SLen Brown 43395b482a8SLen Brown status = acpi_ut_validate_buffer(out_buffer); 43495b482a8SLen Brown if (ACPI_FAILURE(status)) { 43595b482a8SLen Brown return_ACPI_STATUS(status); 43695b482a8SLen Brown } 43795b482a8SLen Brown 43895b482a8SLen Brown /* Validate/Allocate/Clear caller buffer */ 43995b482a8SLen Brown 44095b482a8SLen Brown status = 44195b482a8SLen Brown acpi_ut_initialize_buffer(out_buffer, 44295b482a8SLen Brown sizeof(struct acpi_system_info)); 44395b482a8SLen Brown if (ACPI_FAILURE(status)) { 44495b482a8SLen Brown return_ACPI_STATUS(status); 44595b482a8SLen Brown } 44695b482a8SLen Brown 44795b482a8SLen Brown /* 44895b482a8SLen Brown * Populate the return buffer 44995b482a8SLen Brown */ 45095b482a8SLen Brown info_ptr = (struct acpi_system_info *)out_buffer->pointer; 45195b482a8SLen Brown 45295b482a8SLen Brown info_ptr->acpi_ca_version = ACPI_CA_VERSION; 45395b482a8SLen Brown 45495b482a8SLen Brown /* System flags (ACPI capabilities) */ 45595b482a8SLen Brown 45695b482a8SLen Brown info_ptr->flags = ACPI_SYS_MODE_ACPI; 45795b482a8SLen Brown 45895b482a8SLen Brown /* Timer resolution - 24 or 32 bits */ 45995b482a8SLen Brown 46095b482a8SLen Brown if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) { 46195b482a8SLen Brown info_ptr->timer_resolution = 24; 46295b482a8SLen Brown } else { 46395b482a8SLen Brown info_ptr->timer_resolution = 32; 46495b482a8SLen Brown } 46595b482a8SLen Brown 46695b482a8SLen Brown /* Clear the reserved fields */ 46795b482a8SLen Brown 46895b482a8SLen Brown info_ptr->reserved1 = 0; 46995b482a8SLen Brown info_ptr->reserved2 = 0; 47095b482a8SLen Brown 47195b482a8SLen Brown /* Current debug levels */ 47295b482a8SLen Brown 47395b482a8SLen Brown info_ptr->debug_layer = acpi_dbg_layer; 47495b482a8SLen Brown info_ptr->debug_level = acpi_dbg_level; 47595b482a8SLen Brown 47695b482a8SLen Brown return_ACPI_STATUS(AE_OK); 47795b482a8SLen Brown } 47895b482a8SLen Brown 47995b482a8SLen Brown ACPI_EXPORT_SYMBOL(acpi_get_system_info) 48095b482a8SLen Brown 48195b482a8SLen Brown /***************************************************************************** 48295b482a8SLen Brown * 48395b482a8SLen Brown * FUNCTION: acpi_install_initialization_handler 48495b482a8SLen Brown * 48595b482a8SLen Brown * PARAMETERS: Handler - Callback procedure 48695b482a8SLen Brown * Function - Not (currently) used, see below 48795b482a8SLen Brown * 48895b482a8SLen Brown * RETURN: Status 48995b482a8SLen Brown * 49095b482a8SLen Brown * DESCRIPTION: Install an initialization handler 49195b482a8SLen Brown * 49295b482a8SLen Brown * TBD: When a second function is added, must save the Function also. 49395b482a8SLen Brown * 49495b482a8SLen Brown ****************************************************************************/ 49595b482a8SLen Brown acpi_status 49695b482a8SLen Brown acpi_install_initialization_handler(acpi_init_handler handler, u32 function) 49795b482a8SLen Brown { 49895b482a8SLen Brown 49995b482a8SLen Brown if (!handler) { 50095b482a8SLen Brown return (AE_BAD_PARAMETER); 50195b482a8SLen Brown } 50295b482a8SLen Brown 50395b482a8SLen Brown if (acpi_gbl_init_handler) { 50495b482a8SLen Brown return (AE_ALREADY_EXISTS); 50595b482a8SLen Brown } 50695b482a8SLen Brown 50795b482a8SLen Brown acpi_gbl_init_handler = handler; 50895b482a8SLen Brown return AE_OK; 50995b482a8SLen Brown } 51095b482a8SLen Brown 51195b482a8SLen Brown ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler) 51295b482a8SLen Brown #endif /* ACPI_FUTURE_USAGE */ 51395b482a8SLen Brown /***************************************************************************** 51495b482a8SLen Brown * 51595b482a8SLen Brown * FUNCTION: acpi_purge_cached_objects 51695b482a8SLen Brown * 51795b482a8SLen Brown * PARAMETERS: None 51895b482a8SLen Brown * 51995b482a8SLen Brown * RETURN: Status 52095b482a8SLen Brown * 52195b482a8SLen Brown * DESCRIPTION: Empty all caches (delete the cached objects) 52295b482a8SLen Brown * 52395b482a8SLen Brown ****************************************************************************/ 52495b482a8SLen Brown acpi_status acpi_purge_cached_objects(void) 52595b482a8SLen Brown { 52695b482a8SLen Brown ACPI_FUNCTION_TRACE(acpi_purge_cached_objects); 52795b482a8SLen Brown 52895b482a8SLen Brown (void)acpi_os_purge_cache(acpi_gbl_state_cache); 52995b482a8SLen Brown (void)acpi_os_purge_cache(acpi_gbl_operand_cache); 53095b482a8SLen Brown (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache); 53195b482a8SLen Brown (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache); 53295b482a8SLen Brown return_ACPI_STATUS(AE_OK); 53395b482a8SLen Brown } 53495b482a8SLen Brown 53595b482a8SLen Brown ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects) 53695b482a8SLen Brown #endif 537