diff options
Diffstat (limited to 'drivers/acpi/acpica/utxfinit.c')
| -rw-r--r-- | drivers/acpi/acpica/utxfinit.c | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utxfinit.c b/drivers/acpi/acpica/utxfinit.c new file mode 100644 index 000000000000..14f523627a5e --- /dev/null +++ b/drivers/acpi/acpica/utxfinit.c @@ -0,0 +1,317 @@ +/****************************************************************************** + * + * Module Name: utxfinit - External interfaces for ACPICA initialization + * + *****************************************************************************/ + +/* + * 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" + +#define _COMPONENT ACPI_UTILITIES +ACPI_MODULE_NAME("utxfinit") + +/******************************************************************************* + * + * 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_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); +} +ACPI_EXPORT_SYMBOL(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_enable_subsystem(u32 flags) +{ + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE(acpi_enable_subsystem); + +#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 + */ + status = acpi_tb_initialize_facs(); + if (ACPI_FAILURE(status)) { + ACPI_WARNING((AE_INFO, "Could not map the FACS table")); + return_ACPI_STATUS(status); + } +#endif /* !ACPI_REDUCED_HARDWARE */ + + /* + * 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); + } + } +#if (!ACPI_REDUCED_HARDWARE) + /* + * 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(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) |