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marcus.erl |
/******************************************************************************
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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 - 2007, R. Byron Moore
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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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/*******************************************************************************
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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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acpi_ut_init_globals();
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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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/*
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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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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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* 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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/*******************************************************************************
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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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|
310 |
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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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317 |
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acpi_ut_subsystem_shutdown();
|
319 |
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|
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/* Free the mutex objects */
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321 |
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acpi_ut_mutex_terminate();
|
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|
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#ifdef ACPI_DEBUGGER
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|
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/* Shut down the debugger */
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327 |
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acpi_db_terminate();
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#endif
|
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|
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/* Now we can shutdown the OS-dependent layer */
|
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|
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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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#ifdef ACPI_FUTURE_USAGE
|
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/*******************************************************************************
|
340 |
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*
|
341 |
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* FUNCTION: acpi_subsystem_status
|
342 |
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*
|
343 |
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* PARAMETERS: None
|
344 |
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*
|
345 |
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* RETURN: Status of the ACPI subsystem
|
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*
|
347 |
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* DESCRIPTION: Other drivers that use the ACPI subsystem should call this
|
348 |
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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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******************************************************************************/
|
352 |
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acpi_status acpi_subsystem_status(void)
|
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{
|
354 |
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|
355 |
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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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}
|
361 |
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|
362 |
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ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
|
363 |
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|
364 |
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/*******************************************************************************
|
365 |
|
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*
|
366 |
|
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* FUNCTION: acpi_get_system_info
|
367 |
|
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*
|
368 |
|
|
* PARAMETERS: out_buffer - A buffer to receive the resources for the
|
369 |
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* device
|
370 |
|
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*
|
371 |
|
|
* RETURN: Status - the status of the call
|
372 |
|
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*
|
373 |
|
|
* DESCRIPTION: This function is called to get information about the current
|
374 |
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* state of the ACPI subsystem. It will return system information
|
375 |
|
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* in the out_buffer.
|
376 |
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*
|
377 |
|
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* If the function fails an appropriate status will be returned
|
378 |
|
|
* and the value of out_buffer is undefined.
|
379 |
|
|
*
|
380 |
|
|
******************************************************************************/
|
381 |
|
|
acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
|
382 |
|
|
{
|
383 |
|
|
struct acpi_system_info *info_ptr;
|
384 |
|
|
acpi_status status;
|
385 |
|
|
|
386 |
|
|
ACPI_FUNCTION_TRACE(acpi_get_system_info);
|
387 |
|
|
|
388 |
|
|
/* Parameter validation */
|
389 |
|
|
|
390 |
|
|
status = acpi_ut_validate_buffer(out_buffer);
|
391 |
|
|
if (ACPI_FAILURE(status)) {
|
392 |
|
|
return_ACPI_STATUS(status);
|
393 |
|
|
}
|
394 |
|
|
|
395 |
|
|
/* Validate/Allocate/Clear caller buffer */
|
396 |
|
|
|
397 |
|
|
status =
|
398 |
|
|
acpi_ut_initialize_buffer(out_buffer,
|
399 |
|
|
sizeof(struct acpi_system_info));
|
400 |
|
|
if (ACPI_FAILURE(status)) {
|
401 |
|
|
return_ACPI_STATUS(status);
|
402 |
|
|
}
|
403 |
|
|
|
404 |
|
|
/*
|
405 |
|
|
* Populate the return buffer
|
406 |
|
|
*/
|
407 |
|
|
info_ptr = (struct acpi_system_info *)out_buffer->pointer;
|
408 |
|
|
|
409 |
|
|
info_ptr->acpi_ca_version = ACPI_CA_VERSION;
|
410 |
|
|
|
411 |
|
|
/* System flags (ACPI capabilities) */
|
412 |
|
|
|
413 |
|
|
info_ptr->flags = ACPI_SYS_MODE_ACPI;
|
414 |
|
|
|
415 |
|
|
/* Timer resolution - 24 or 32 bits */
|
416 |
|
|
|
417 |
|
|
if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
|
418 |
|
|
info_ptr->timer_resolution = 24;
|
419 |
|
|
} else {
|
420 |
|
|
info_ptr->timer_resolution = 32;
|
421 |
|
|
}
|
422 |
|
|
|
423 |
|
|
/* Clear the reserved fields */
|
424 |
|
|
|
425 |
|
|
info_ptr->reserved1 = 0;
|
426 |
|
|
info_ptr->reserved2 = 0;
|
427 |
|
|
|
428 |
|
|
/* Current debug levels */
|
429 |
|
|
|
430 |
|
|
info_ptr->debug_layer = acpi_dbg_layer;
|
431 |
|
|
info_ptr->debug_level = acpi_dbg_level;
|
432 |
|
|
|
433 |
|
|
return_ACPI_STATUS(AE_OK);
|
434 |
|
|
}
|
435 |
|
|
|
436 |
|
|
ACPI_EXPORT_SYMBOL(acpi_get_system_info)
|
437 |
|
|
|
438 |
|
|
/*****************************************************************************
|
439 |
|
|
*
|
440 |
|
|
* FUNCTION: acpi_install_initialization_handler
|
441 |
|
|
*
|
442 |
|
|
* PARAMETERS: Handler - Callback procedure
|
443 |
|
|
* Function - Not (currently) used, see below
|
444 |
|
|
*
|
445 |
|
|
* RETURN: Status
|
446 |
|
|
*
|
447 |
|
|
* DESCRIPTION: Install an initialization handler
|
448 |
|
|
*
|
449 |
|
|
* TBD: When a second function is added, must save the Function also.
|
450 |
|
|
*
|
451 |
|
|
****************************************************************************/
|
452 |
|
|
acpi_status
|
453 |
|
|
acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
|
454 |
|
|
{
|
455 |
|
|
|
456 |
|
|
if (!handler) {
|
457 |
|
|
return (AE_BAD_PARAMETER);
|
458 |
|
|
}
|
459 |
|
|
|
460 |
|
|
if (acpi_gbl_init_handler) {
|
461 |
|
|
return (AE_ALREADY_EXISTS);
|
462 |
|
|
}
|
463 |
|
|
|
464 |
|
|
acpi_gbl_init_handler = handler;
|
465 |
|
|
return AE_OK;
|
466 |
|
|
}
|
467 |
|
|
|
468 |
|
|
ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
|
469 |
|
|
#endif /* ACPI_FUTURE_USAGE */
|
470 |
|
|
/*****************************************************************************
|
471 |
|
|
*
|
472 |
|
|
* FUNCTION: acpi_purge_cached_objects
|
473 |
|
|
*
|
474 |
|
|
* PARAMETERS: None
|
475 |
|
|
*
|
476 |
|
|
* RETURN: Status
|
477 |
|
|
*
|
478 |
|
|
* DESCRIPTION: Empty all caches (delete the cached objects)
|
479 |
|
|
*
|
480 |
|
|
****************************************************************************/
|
481 |
|
|
acpi_status acpi_purge_cached_objects(void)
|
482 |
|
|
{
|
483 |
|
|
ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
|
484 |
|
|
|
485 |
|
|
(void)acpi_os_purge_cache(acpi_gbl_state_cache);
|
486 |
|
|
(void)acpi_os_purge_cache(acpi_gbl_operand_cache);
|
487 |
|
|
(void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
|
488 |
|
|
(void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
|
489 |
|
|
return_ACPI_STATUS(AE_OK);
|
490 |
|
|
}
|
491 |
|
|
|
492 |
|
|
ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
|