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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
*
* Module Name : utxfinit - External interfaces for ACPICA initialization
*
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* Copyright ( C ) 2000 - 2023 , Intel Corp .
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*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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# define EXPORT_ACPI_INTERFACES
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# include <acpi/acpi.h>
# include "accommon.h"
# include "acevents.h"
# include "acnamesp.h"
# include "acdebug.h"
# include "actables.h"
# define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ( " utxfinit " )
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/* For acpi_exec only */
void ae_do_object_overrides ( void ) ;
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/*******************************************************************************
*
* 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 .
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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acpi_status ACPI_INIT_FUNCTION acpi_initialize_subsystem ( void )
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{
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 ) ;
}
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return_ACPI_STATUS ( AE_OK ) ;
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}
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ACPI_EXPORT_SYMBOL_INIT ( acpi_initialize_subsystem )
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/*******************************************************************************
*
* 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 .
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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acpi_status ACPI_INIT_FUNCTION acpi_enable_subsystem ( u32 flags )
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{
acpi_status status = AE_OK ;
ACPI_FUNCTION_TRACE ( acpi_enable_subsystem ) ;
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/*
* The early initialization phase is complete . The namespace is loaded ,
* and we can now support address spaces other than Memory , I / O , and
* PCI_Config .
*/
acpi_gbl_early_initialization = FALSE ;
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# if (!ACPI_REDUCED_HARDWARE)
/* 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
*/
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if ( ! ( flags & ACPI_NO_FACS_INIT ) ) {
status = acpi_tb_initialize_facs ( ) ;
if ( ACPI_FAILURE ( status ) ) {
ACPI_WARNING ( ( AE_INFO , " Could not map the FACS table " ) ) ;
return_ACPI_STATUS ( status ) ;
}
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}
/*
* 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 ) and the various
* initialization control methods are run ( _REG , _STA , _INI ) on the
* entire namespace .
*/
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 ) ;
}
}
# endif /* !ACPI_REDUCED_HARDWARE */
return_ACPI_STATUS ( status ) ;
}
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ACPI_EXPORT_SYMBOL_INIT ( acpi_enable_subsystem )
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/*******************************************************************************
*
* 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 .
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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acpi_status ACPI_INIT_FUNCTION acpi_initialize_objects ( u32 flags )
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{
acpi_status status = AE_OK ;
ACPI_FUNCTION_TRACE ( acpi_initialize_objects ) ;
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# ifdef ACPI_OBSOLETE_BEHAVIOR
/*
* 05 / 2019 : Removed , initialization now happens at both object
* creation and table load time
*/
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/*
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* Initialize the objects that remain uninitialized . This
* runs the executable AML that may be part of the
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* declaration of these objects : operation_regions , buffer_fields ,
* bank_fields , Buffers , and Packages .
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*/
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if ( ! ( flags & ACPI_NO_OBJECT_INIT ) ) {
status = acpi_ns_initialize_objects ( ) ;
if ( ACPI_FAILURE ( status ) ) {
return_ACPI_STATUS ( status ) ;
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}
}
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# endif
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/*
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* Initialize all device / region objects in the namespace . This runs
* the device _STA and _INI methods and region _REG methods .
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*/
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if ( ! ( flags & ( ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT ) ) ) {
status = acpi_ns_initialize_devices ( flags ) ;
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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 ) ;
}
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ACPI_EXPORT_SYMBOL_INIT ( acpi_initialize_objects )