/******************************************************************************
*
* Module Name: utxface - External interfaces for "global" ACPI functions
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* 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/module.h>
#include <acpi/acpi.h>
#include <acpi/acevents.h>
#include <acpi/acnamesp.h>
#include <acpi/acparser.h>
#include <acpi/acdispat.h>
#include <acpi/acdebug.h>
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utxface")
/*******************************************************************************
*
* 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
acpi_initialize_subsystem (
void)
{
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_initialize_subsystem");
ACPI_DEBUG_EXEC (acpi_ut_init_stack_ptr_trace ());
/* Initialize all globals used by the subsystem */
acpi_ut_init_globals ();
/* Initialize the OS-Dependent layer */
status = acpi_os_initialize ();
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("OSD failed to initialize, %s\n",
acpi_format_exception (status)));
return_ACPI_STATUS (status);
}
/* Create the default mutex objects */
status = acpi_ut_mutex_initialize ();
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("Global mutex creation failure, %s\n",
acpi_format_exception (status)));
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_REPORT_ERROR (("Namespace initialization failure, %s\n",
acpi_format_exception (status)));
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");
/*
* We must initialize the hardware before we can enable ACPI.
* The values from the FADT are validated here.
*/
if (!(flags & ACPI_NO_HARDWARE_INIT)) {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI hardware\n"));
status = acpi_hw_initialize ();
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* 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_DEBUG_PRINT ((ACPI_DB_WARN, "acpi_enable failed.\n"));
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)
*
* NOTE: 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 initialized before execution!
*/
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 */
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);
}
/*******************************************************************************
*
* 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 call to acpi_ns_initialize_objects below).
*/
if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Executing _REG op_region methods\n"));
status = acpi_ev_initialize_op_regions ();
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/*
* 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 _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);
}
/*******************************************************************************
*
* FUNCTION: acpi_terminate
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Shutdown the ACPI subsystem. Release all resources.
*
******************************************************************************/
acpi_status
acpi_terminate (void)
{
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_terminate");
/* 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);
}
#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 initial-
* ized successfully.
*
****************************************************************************/
acpi_status
acpi_subsystem_status (void)
{
if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
return (AE_OK);
}
else {
return (AE_ERROR);
}
}
/******************************************************************************
*
* FUNCTION: acpi_get_system_info
*
* PARAMETERS: out_buffer - a pointer to a buffer to receive the
* resources for the device
* buffer_length - the number of bytes available in the buffer
*
* 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;
u32 i;
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) {
info_ptr->timer_resolution = 0;
}
else if (acpi_gbl_FADT->tmr_val_ext == 0) {
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;
/* Current status of the ACPI tables, per table type */
info_ptr->num_table_types = NUM_ACPI_TABLE_TYPES;
for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
info_ptr->table_info[i].count = acpi_gbl_table_lists[i].count;
}
return_ACPI_STATUS (AE_OK);
}
EXPORT_SYMBOL(acpi_get_system_info);
/*****************************************************************************
*
* FUNCTION: acpi_install_initialization_handler
*
* PARAMETERS: Handler - Callback procedure
*
* 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;
}
#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");
#ifdef ACPI_ENABLE_OBJECT_CACHE
acpi_ut_delete_generic_state_cache ();
acpi_ut_delete_object_cache ();
acpi_ds_delete_walk_state_cache ();
acpi_ps_delete_parse_cache ();
#endif
return_ACPI_STATUS (AE_OK);
}
