- 根目录:
- drivers
- acpi
- acpica
- utxface.c
/******************************************************************************
*
* Module Name: utxface - External interfaces for "global" ACPI functions
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2012, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <linux/export.h>
#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"
#include "acdebug.h"
#include "actables.h"
#include "acinterp.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME("utxface")
#ifndef ACPI_ASL_COMPILER
/*******************************************************************************
*
* FUNCTION: acpi_initialize_subsystem
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initializes all global variables. This is the first function
* called, so any early initialization belongs here.
*
******************************************************************************/
acpi_status __init acpi_initialize_subsystem(void)
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
/* Initialize the OS-Dependent layer */
status = acpi_os_initialize();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
return_ACPI_STATUS(status);
}
/* Initialize all globals used by the subsystem */
status = acpi_ut_init_globals();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"During initialization of globals"));
return_ACPI_STATUS(status);
}
/* Create the default mutex objects */
status = acpi_ut_mutex_initialize();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"During Global Mutex creation"));
return_ACPI_STATUS(status);
}
/*
* Initialize the namespace manager and
* the root of the namespace tree
*/
status = acpi_ns_root_initialize();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"During Namespace initialization"));
return_ACPI_STATUS(status);
}
/* Initialize the global OSI interfaces list with the static names */
status = acpi_ut_initialize_interfaces();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"During OSI interfaces initialization"));
return_ACPI_STATUS(status);
}
/* If configured, initialize the AML debugger */
ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_enable_subsystem
*
* PARAMETERS: Flags - Init/enable Options
*
* RETURN: Status
*
* DESCRIPTION: Completes the subsystem initialization including hardware.
* Puts system into ACPI mode if it isn't already.
*
******************************************************************************/
acpi_status acpi_enable_subsystem(u32 flags)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
/* Enable ACPI mode */
if (!(flags & ACPI_NO_ACPI_ENABLE)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Going into ACPI mode\n"));
acpi_gbl_original_mode = acpi_hw_get_mode();
status = acpi_enable();
if (ACPI_FAILURE(status)) {
ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
return_ACPI_STATUS(status);
}
}
/*
* Obtain a permanent mapping for the FACS. This is required for the
* Global Lock and the Firmware Waking Vector
*/
status = acpi_tb_initialize_facs();
if (ACPI_FAILURE(status)) {
ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
return_ACPI_STATUS(status);
}
/*
* Install the default op_region handlers. These are installed unless
* other handlers have already been installed via the
* install_address_space_handler interface.
*/
if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Installing default address space handlers\n"));
status = acpi_ev_install_region_handlers();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Initialize ACPI Event handling (Fixed and General Purpose)
*
* Note1: We must have the hardware and events initialized before we can
* execute any control methods safely. Any control method can require
* ACPI hardware support, so the hardware must be fully initialized before
* any method execution!
*
* Note2: Fixed events are initialized and enabled here. GPEs are
* initialized, but cannot be enabled until after the hardware is
* completely initialized (SCI and global_lock activated)
*/
if (!(flags & ACPI_NO_EVENT_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Initializing ACPI events\n"));
status = acpi_ev_initialize_events();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Install the SCI handler and Global Lock handler. This completes the
* hardware initialization.
*/
if (!(flags & ACPI_NO_HANDLER_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Installing SCI/GL handlers\n"));
status = acpi_ev_install_xrupt_handlers();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_enable_subsystem)
/*******************************************************************************
*
* FUNCTION: acpi_initialize_objects
*
* PARAMETERS: Flags - Init/enable Options
*
* RETURN: Status
*
* DESCRIPTION: Completes namespace initialization by initializing device
* objects and executing AML code for Regions, buffers, etc.
*
******************************************************************************/
acpi_status acpi_initialize_objects(u32 flags)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(acpi_initialize_objects);
/*
* Run all _REG methods
*
* Note: Any objects accessed by the _REG methods will be automatically
* initialized, even if they contain executable AML (see the call to
* acpi_ns_initialize_objects below).
*/
if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Executing _REG OpRegion methods\n"));
status = acpi_ev_initialize_op_regions();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Execute any module-level code that was detected during the table load
* phase. Although illegal since ACPI 2.0, there are many machines that
* contain this type of code. Each block of detected executable AML code
* outside of any control method is wrapped with a temporary control
* method object and placed on a global list. The methods on this list
* are executed below.
*/
acpi_ns_exec_module_code_list();
/*
* Initialize the objects that remain uninitialized. This runs the
* executable AML that may be part of the declaration of these objects:
* operation_regions, buffer_fields, Buffers, and Packages.
*/
if (!(flags & ACPI_NO_OBJECT_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Completing Initialization of ACPI Objects\n"));
status = acpi_ns_initialize_objects();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Initialize all device objects in the namespace. This runs the device
* _STA and _INI methods.
*/
if (!(flags & ACPI_NO_DEVICE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Initializing ACPI Devices\n"));
status = acpi_ns_initialize_devices();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Empty the caches (delete the cached objects) on the assumption that
* the table load filled them up more than they will be at runtime --
* thus wasting non-paged memory.
*/
status = acpi_purge_cached_objects();
acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_initialize_objects)
#endif
/*******************************************************************************
*
* FUNCTION: acpi_terminate
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
*
******************************************************************************/
acpi_status acpi_terminate(void)
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_terminate);
/* Just exit if subsystem is already shutdown */
if (acpi_gbl_shutdown) {
ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
return_ACPI_STATUS(AE_OK);
}
/* Subsystem appears active, go ahead and shut it down */
acpi_gbl_shutdown = TRUE;
acpi_gbl_startup_flags = 0;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
/* Terminate the AML Debugger if present */
ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
/* Shutdown and free all resources */
acpi_ut_subsystem_shutdown();
/* Free the mutex objects */
acpi_ut_mutex_terminate();
#ifdef ACPI_DEBUGGER
/* Shut down the debugger */
acpi_db_terminate();
#endif
/* Now we can shutdown the OS-dependent layer */
status = acpi_os_terminate();
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_terminate)
#ifndef ACPI_ASL_COMPILER
#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
*
* FUNCTION: acpi_subsystem_status
*
* PARAMETERS: None
*
* RETURN: Status of the ACPI subsystem
*
* DESCRIPTION: Other drivers that use the ACPI subsystem should call this
* before making any other calls, to ensure the subsystem
* initialized successfully.
*
******************************************************************************/
acpi_status acpi_subsystem_status(void)
{
if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
return (AE_OK);
} else {
return (AE_ERROR);
}
}
ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
/*******************************************************************************
*
* FUNCTION: acpi_get_system_info
*
* PARAMETERS: out_buffer - A buffer to receive the resources for the
* device
*
* RETURN: Status - the status of the call
*
* DESCRIPTION: This function is called to get information about the current
* state of the ACPI subsystem. It will return system information
* in the out_buffer.
*
* If the function fails an appropriate status will be returned
* and the value of out_buffer is undefined.
*
******************************************************************************/
acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
{
struct acpi_system_info *info_ptr;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_get_system_info);
/* Parameter validation */
status = acpi_ut_validate_buffer(out_buffer);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Validate/Allocate/Clear caller buffer */
status =
acpi_ut_initialize_buffer(out_buffer,
sizeof(struct acpi_system_info));
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Populate the return buffer
*/
info_ptr = (struct acpi_system_info *)out_buffer->pointer;
info_ptr->acpi_ca_version = ACPI_CA_VERSION;
/* System flags (ACPI capabilities) */
info_ptr->flags = ACPI_SYS_MODE_ACPI;
/* Timer resolution - 24 or 32 bits */
if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
info_ptr->timer_resolution = 24;
} else {
info_ptr->timer_resolution = 32;
}
/* Clear the reserved fields */
info_ptr->reserved1 = 0;
info_ptr->reserved2 = 0;
/* Current debug levels */
info_ptr->debug_layer = acpi_dbg_layer;
info_ptr->debug_level = acpi_dbg_level;
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_get_system_info)
/*****************************************************************************
*
* FUNCTION: acpi_install_initialization_handler
*
* PARAMETERS: Handler - Callback procedure
* Function - Not (currently) used, see below
*
* RETURN: Status
*
* DESCRIPTION: Install an initialization handler
*
* TBD: When a second function is added, must save the Function also.
*
****************************************************************************/
acpi_status
acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
{
if (!handler) {
return (AE_BAD_PARAMETER);
}
if (acpi_gbl_init_handler) {
return (AE_ALREADY_EXISTS);
}
acpi_gbl_init_handler = handler;
return AE_OK;
}
ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
#endif /* ACPI_FUTURE_USAGE */
/*****************************************************************************
*
* FUNCTION: acpi_purge_cached_objects
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Empty all caches (delete the cached objects)
*
****************************************************************************/
acpi_status acpi_purge_cached_objects(void)
{
ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
(void)acpi_os_purge_cache(acpi_gbl_state_cache);
(void)acpi_os_purge_cache(acpi_gbl_operand_cache);
(void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
(void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
/*****************************************************************************
*
* FUNCTION: acpi_install_interface
*
* PARAMETERS: interface_name - The interface to install
*
* RETURN: Status
*
* DESCRIPTION: Install an _OSI interface to the global list
*
****************************************************************************/
acpi_status acpi_install_interface(acpi_string interface_name)
{
acpi_status status;
struct acpi_interface_info *interface_info;
/* Parameter validation */
if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
return (AE_BAD_PARAMETER);
}
(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
/* Check if the interface name is already in the global list */
interface_info = acpi_ut_get_interface(interface_name);
if (interface_info) {
/*
* The interface already exists in the list. This is OK if the
* interface has been marked invalid -- just clear the bit.
*/
if (interface_info->flags & ACPI_OSI_INVALID) {
interface_info->flags &= ~ACPI_OSI_INVALID;
status = AE_OK;
} else {
status = AE_ALREADY_EXISTS;
}
} else {
/* New interface name, install into the global list */
status = acpi_ut_install_interface(interface_name);
}
acpi_os_release_mutex(acpi_gbl_osi_mutex);
return (status);
}
ACPI_EXPORT_SYMBOL(acpi_install_interface)
/*****************************************************************************
*
* FUNCTION: acpi_remove_interface
*
* PARAMETERS: interface_name - The interface to remove
*
* RETURN: Status
*
* DESCRIPTION: Remove an _OSI interface from the global list
*
****************************************************************************/
acpi_status acpi_remove_interface(acpi_string interface_name)
{
acpi_status status;
/* Parameter validation */
if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
return (AE_BAD_PARAMETER);
}
(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
status = acpi_ut_remove_interface(interface_name);
acpi_os_release_mutex(acpi_gbl_osi_mutex);
return (status);
}
ACPI_EXPORT_SYMBOL(acpi_remove_interface)
/*****************************************************************************
*
* FUNCTION: acpi_install_interface_handler
*
* PARAMETERS: Handler - The _OSI interface handler to install
* NULL means "remove existing handler"
*
* RETURN: Status
*
* DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
* invoked during execution of the internal implementation of
* _OSI. A NULL handler simply removes any existing handler.
*
****************************************************************************/
acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
{
acpi_status status = AE_OK;
(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
if (handler && acpi_gbl_interface_handler) {
status = AE_ALREADY_EXISTS;
} else {
acpi_gbl_interface_handler = handler;
}
acpi_os_release_mutex(acpi_gbl_osi_mutex);
return (status);
}
ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
/*****************************************************************************
*
* FUNCTION: acpi_check_address_range
*
* PARAMETERS: space_id - Address space ID
* Address - Start address
* Length - Length
* Warn - TRUE if warning on overlap desired
*
* RETURN: Count of the number of conflicts detected.
*
* DESCRIPTION: Check if the input address range overlaps any of the
* ASL operation region address ranges.
*
****************************************************************************/
u32
acpi_check_address_range(acpi_adr_space_type space_id,
acpi_physical_address address,
acpi_size length, u8 warn)
{
u32 overlaps;
acpi_status status;
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return (0);
}
overlaps = acpi_ut_check_address_range(space_id, address,
(u32)length, warn);
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return (overlaps);
}
ACPI_EXPORT_SYMBOL(acpi_check_address_range)
#endif /* !ACPI_ASL_COMPILER */