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525 lines
14 KiB
525 lines
14 KiB
/******************************************************************************
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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 - 2005, 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 <linux/module.h>
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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/acparser.h>
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#include <acpi/acdispat.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
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acpi_initialize_subsystem (
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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_DEBUG_EXEC (acpi_ut_init_stack_ptr_trace ());
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/* Initialize all globals used by the subsystem */
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acpi_ut_init_globals ();
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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_REPORT_ERROR (("OSD failed to initialize, %s\n",
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acpi_format_exception (status)));
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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_REPORT_ERROR (("Global mutex creation failure, %s\n",
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acpi_format_exception (status)));
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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_REPORT_ERROR (("Namespace initialization failure, %s\n",
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acpi_format_exception (status)));
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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
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acpi_enable_subsystem (
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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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/*
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* We must initialize the hardware before we can enable ACPI.
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* The values from the FADT are validated here.
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*/
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if (!(flags & ACPI_NO_HARDWARE_INIT)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI hardware\n"));
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status = acpi_hw_initialize ();
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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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/* Enable ACPI mode */
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if (!(flags & ACPI_NO_ACPI_ENABLE)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[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_DEBUG_PRINT ((ACPI_DB_WARN, "acpi_enable failed.\n"));
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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, "[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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* NOTE: We must have the hardware AND events initialized before we can execute
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* ANY control methods SAFELY. Any control method can require ACPI hardware
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* support, so the hardware MUST be initialized before execution!
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*/
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if (!(flags & ACPI_NO_EVENT_INIT)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[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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/* Install the SCI handler and Global Lock handler */
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if (!(flags & ACPI_NO_HANDLER_INIT)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[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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/*******************************************************************************
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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
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acpi_initialize_objects (
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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
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* by the _REG methods will be automatically initialized, even if they
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* contain executable AML (see call to 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, "[Init] Executing _REG op_region 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
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* runs the executable AML that may be part of the declaration of these
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* objects: 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, "[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
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* This runs the _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, "[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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/*******************************************************************************
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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
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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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#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 initial-
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* ized successfully.
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*
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****************************************************************************/
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acpi_status
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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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}
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else {
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return (AE_ERROR);
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}
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}
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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 pointer to a buffer to receive the
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* resources for the device
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* buffer_length - the number of bytes available in the buffer
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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
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acpi_get_system_info (
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struct acpi_buffer *out_buffer)
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{
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struct acpi_system_info *info_ptr;
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u32 i;
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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 = acpi_ut_initialize_buffer (out_buffer, 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) {
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info_ptr->timer_resolution = 0;
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}
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else if (acpi_gbl_FADT->tmr_val_ext == 0) {
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info_ptr->timer_resolution = 24;
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}
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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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/* Current status of the ACPI tables, per table type */
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info_ptr->num_table_types = NUM_ACPI_TABLE_TYPES;
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for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
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info_ptr->table_info[i].count = acpi_gbl_table_lists[i].count;
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}
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return_ACPI_STATUS (AE_OK);
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}
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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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*
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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 (
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acpi_init_handler handler,
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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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#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
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acpi_purge_cached_objects (void)
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{
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ACPI_FUNCTION_TRACE ("acpi_purge_cached_objects");
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#ifdef ACPI_ENABLE_OBJECT_CACHE
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acpi_ut_delete_generic_state_cache ();
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acpi_ut_delete_object_cache ();
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acpi_ds_delete_walk_state_cache ();
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acpi_ps_delete_parse_cache ();
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#endif
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return_ACPI_STATUS (AE_OK);
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}
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