501 lines
14 KiB
C
501 lines
14 KiB
C
/******************************************************************************
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*
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* Module Name: utxface - External interfaces for "global" ACPI functions
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acevents.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acdebug.h>
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utxface")
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#ifndef ACPI_ASL_COMPILER
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/*******************************************************************************
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*
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* FUNCTION: acpi_initialize_subsystem
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initializes all global variables. This is the first function
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* called, so any early initialization belongs here.
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*
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******************************************************************************/
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acpi_status __init acpi_initialize_subsystem(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
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acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
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ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
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/* Initialize the OS-Dependent layer */
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status = acpi_os_initialize();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
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return_ACPI_STATUS(status);
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}
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/* Initialize all globals used by the subsystem */
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status = acpi_ut_init_globals();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"During initialization of globals"));
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return_ACPI_STATUS(status);
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}
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/* Create the default mutex objects */
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status = acpi_ut_mutex_initialize();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"During Global Mutex creation"));
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return_ACPI_STATUS(status);
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}
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/*
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* Initialize the namespace manager and
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* the root of the namespace tree
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*/
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status = acpi_ns_root_initialize();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"During Namespace initialization"));
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return_ACPI_STATUS(status);
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}
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/* If configured, initialize the AML debugger */
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ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_enable_subsystem
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*
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* PARAMETERS: Flags - Init/enable Options
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*
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* RETURN: Status
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*
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* DESCRIPTION: Completes the subsystem initialization including hardware.
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* Puts system into ACPI mode if it isn't already.
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*
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******************************************************************************/
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acpi_status acpi_enable_subsystem(u32 flags)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
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/* Enable ACPI mode */
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if (!(flags & ACPI_NO_ACPI_ENABLE)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Going into ACPI mode\n"));
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acpi_gbl_original_mode = acpi_hw_get_mode();
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status = acpi_enable();
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if (ACPI_FAILURE(status)) {
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ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
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return_ACPI_STATUS(status);
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}
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}
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/*
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* Install the default op_region handlers. These are installed unless
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* other handlers have already been installed via the
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* install_address_space_handler interface.
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*/
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if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Installing default address space handlers\n"));
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status = acpi_ev_install_region_handlers();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/*
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* Initialize ACPI Event handling (Fixed and General Purpose)
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*
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* Note1: We must have the hardware and events initialized before we can
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* execute any control methods safely. Any control method can require
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* ACPI hardware support, so the hardware must be fully initialized before
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* any method execution!
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*
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* Note2: Fixed events are initialized and enabled here. GPEs are
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* initialized, but cannot be enabled until after the hardware is
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* completely initialized (SCI and global_lock activated)
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*/
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if (!(flags & ACPI_NO_EVENT_INIT)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Initializing ACPI events\n"));
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status = acpi_ev_initialize_events();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/*
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* Install the SCI handler and Global Lock handler. This completes the
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* hardware initialization.
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*/
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if (!(flags & ACPI_NO_HANDLER_INIT)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Installing SCI/GL handlers\n"));
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status = acpi_ev_install_xrupt_handlers();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_enable_subsystem)
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/*******************************************************************************
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*
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* FUNCTION: acpi_initialize_objects
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*
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* PARAMETERS: Flags - Init/enable Options
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*
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* RETURN: Status
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*
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* DESCRIPTION: Completes namespace initialization by initializing device
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* objects and executing AML code for Regions, buffers, etc.
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*
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******************************************************************************/
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acpi_status acpi_initialize_objects(u32 flags)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(acpi_initialize_objects);
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/*
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* Run all _REG methods
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*
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* Note: Any objects accessed by the _REG methods will be automatically
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* initialized, even if they contain executable AML (see the call to
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* acpi_ns_initialize_objects below).
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*/
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if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Executing _REG OpRegion methods\n"));
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status = acpi_ev_initialize_op_regions();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/*
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* Initialize the objects that remain uninitialized. This runs the
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* executable AML that may be part of the declaration of these objects:
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* operation_regions, buffer_fields, Buffers, and Packages.
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*/
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if (!(flags & ACPI_NO_OBJECT_INIT)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Completing Initialization of ACPI Objects\n"));
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status = acpi_ns_initialize_objects();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/*
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* Initialize all device objects in the namespace. This runs the device
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* _STA and _INI methods.
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*/
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if (!(flags & ACPI_NO_DEVICE_INIT)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Initializing ACPI Devices\n"));
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status = acpi_ns_initialize_devices();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/*
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* Complete the GPE initialization for the GPE blocks defined in the FADT
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* (GPE block 0 and 1).
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*
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* Note1: This is where the _PRW methods are executed for the GPEs. These
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* methods can only be executed after the SCI and Global Lock handlers are
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* installed and initialized.
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*
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* Note2: Currently, there seems to be no need to run the _REG methods
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* before execution of the _PRW methods and enabling of the GPEs.
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*/
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if (!(flags & ACPI_NO_EVENT_INIT)) {
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status = acpi_ev_install_fadt_gpes();
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if (ACPI_FAILURE(status))
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return (status);
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}
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/*
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* Empty the caches (delete the cached objects) on the assumption that
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* the table load filled them up more than they will be at runtime --
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* thus wasting non-paged memory.
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*/
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status = acpi_purge_cached_objects();
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acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_initialize_objects)
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#endif
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/*******************************************************************************
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*
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* FUNCTION: acpi_terminate
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Shutdown the ACPI subsystem. Release all resources.
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*
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******************************************************************************/
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acpi_status acpi_terminate(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_terminate);
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/* Terminate the AML Debugger if present */
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ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
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/* Shutdown and free all resources */
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acpi_ut_subsystem_shutdown();
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/* Free the mutex objects */
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acpi_ut_mutex_terminate();
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#ifdef ACPI_DEBUGGER
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/* Shut down the debugger */
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acpi_db_terminate();
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#endif
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/* Now we can shutdown the OS-dependent layer */
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status = acpi_os_terminate();
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_terminate)
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#ifndef ACPI_ASL_COMPILER
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#ifdef ACPI_FUTURE_USAGE
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/*******************************************************************************
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*
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* FUNCTION: acpi_subsystem_status
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*
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* PARAMETERS: None
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*
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* RETURN: Status of the ACPI subsystem
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*
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* DESCRIPTION: Other drivers that use the ACPI subsystem should call this
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* before making any other calls, to ensure the subsystem
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* initialized successfully.
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*
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******************************************************************************/
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acpi_status acpi_subsystem_status(void)
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{
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if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
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return (AE_OK);
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} else {
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return (AE_ERROR);
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}
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}
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ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_system_info
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*
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* PARAMETERS: out_buffer - A buffer to receive the resources for the
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* device
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*
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* RETURN: Status - the status of the call
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*
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* DESCRIPTION: This function is called to get information about the current
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* state of the ACPI subsystem. It will return system information
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* in the out_buffer.
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*
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* If the function fails an appropriate status will be returned
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* and the value of out_buffer is undefined.
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*
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******************************************************************************/
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acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
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{
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struct acpi_system_info *info_ptr;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_get_system_info);
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/* Parameter validation */
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status = acpi_ut_validate_buffer(out_buffer);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Validate/Allocate/Clear caller buffer */
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status =
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acpi_ut_initialize_buffer(out_buffer,
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sizeof(struct acpi_system_info));
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* Populate the return buffer
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*/
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info_ptr = (struct acpi_system_info *)out_buffer->pointer;
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info_ptr->acpi_ca_version = ACPI_CA_VERSION;
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/* System flags (ACPI capabilities) */
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info_ptr->flags = ACPI_SYS_MODE_ACPI;
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/* Timer resolution - 24 or 32 bits */
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if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
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info_ptr->timer_resolution = 24;
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} else {
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info_ptr->timer_resolution = 32;
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}
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/* Clear the reserved fields */
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info_ptr->reserved1 = 0;
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info_ptr->reserved2 = 0;
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/* Current debug levels */
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info_ptr->debug_layer = acpi_dbg_layer;
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info_ptr->debug_level = acpi_dbg_level;
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_system_info)
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/*****************************************************************************
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*
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* FUNCTION: acpi_install_initialization_handler
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*
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* PARAMETERS: Handler - Callback procedure
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* Function - Not (currently) used, see below
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install an initialization handler
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*
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* TBD: When a second function is added, must save the Function also.
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*
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****************************************************************************/
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acpi_status
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acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
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{
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if (!handler) {
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return (AE_BAD_PARAMETER);
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}
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if (acpi_gbl_init_handler) {
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return (AE_ALREADY_EXISTS);
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}
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acpi_gbl_init_handler = handler;
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return AE_OK;
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}
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ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
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#endif /* ACPI_FUTURE_USAGE */
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/*****************************************************************************
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*
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* FUNCTION: acpi_purge_cached_objects
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Empty all caches (delete the cached objects)
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*
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****************************************************************************/
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acpi_status acpi_purge_cached_objects(void)
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{
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ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
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(void)acpi_os_purge_cache(acpi_gbl_state_cache);
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(void)acpi_os_purge_cache(acpi_gbl_operand_cache);
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(void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
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(void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
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#endif
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