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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: utxfinit - External interfaces for ACPICA initialization
*
* Copyright (C) 2000 - 2023, Intel Corp.
*
*****************************************************************************/
#define EXPORT_ACPI_INTERFACES
#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")
/* For acpi_exec only */
void ae_do_object_overrides(void);
/*******************************************************************************
*
* 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_INIT_FUNCTION 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);
}
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)
/*******************************************************************************
*
* 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_INIT_FUNCTION acpi_enable_subsystem(u32 flags)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
/*
* 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;
#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
*/
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);
}
}
/*
* 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);
}
ACPI_EXPORT_SYMBOL_INIT(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_INIT_FUNCTION acpi_initialize_objects(u32 flags)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(acpi_initialize_objects);
#ifdef ACPI_OBSOLETE_BEHAVIOR
/*
* 05/2019: Removed, initialization now happens at both object
* creation and table load time
*/
/*
* 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,
* bank_fields, Buffers, and Packages.
*/
if (!(flags & ACPI_NO_OBJECT_INIT)) {
status = acpi_ns_initialize_objects();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
#endif
/*
* Initialize all device/region objects in the namespace. This runs
* the device _STA and _INI methods and region _REG methods.
*/
if (!(flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) {
status = acpi_ns_initialize_devices(flags);
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_INIT(acpi_initialize_objects)
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