[mirror_ubuntu-artful-kernel.git] / drivers / acpi / acpica / utxfinit.c

/******************************************************************************
 *
 * Module Name: utxfinit - External interfaces for ACPICA initialization
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2017, 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.
 */

#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_EXEC_APP
	/*
	 * This call implements the "initialization file" option for acpi_exec.
	 * This is the precise point that we want to perform the overrides.
	 */
	ae_do_object_overrides();
#endif

	/*
	 * 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.
	 *
	 * This case executes the module-level code for all tables only after
	 * all of the tables have been loaded. It is a legacy option and is
	 * not compatible with other ACPI implementations. See acpi_ns_load_table.
	 */
	if (!acpi_gbl_parse_table_as_term_list
	    && acpi_gbl_group_module_level_code) {
		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)) {
			status = acpi_ns_initialize_objects();
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}
		}
	}

	/*
	 * 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)
Commit	Line	Data
d978348b BM	1	/******************************************************************************
	2	*
	3	* Module Name: utxfinit - External interfaces for ACPICA initialization
	4	*
	5	*****************************************************************************/
	6
	7	/*
7735ca0e	8	* Copyright (C) 2000 - 2017, Intel Corp.
d978348b BM	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
839e928f LZ	44	#define EXPORT_ACPI_INTERFACES
839e928f LZ	45
d978348b BM	46	#include <acpi/acpi.h>
	47	#include "accommon.h"
	48	#include "acevents.h"
	49	#include "acnamesp.h"
	50	#include "acdebug.h"
	51	#include "actables.h"
	52
	53	#define _COMPONENT ACPI_UTILITIES
	54	ACPI_MODULE_NAME("utxfinit")
	55
b487867c BM	56	/* For acpi_exec only */
	57	void ae_do_object_overrides(void);
	58
d978348b BM	59	/*******************************************************************************
	60	*
	61	* FUNCTION: acpi_initialize_subsystem
	62	*
	63	* PARAMETERS: None
	64	*
	65	* RETURN: Status
	66	*
	67	* DESCRIPTION: Initializes all global variables. This is the first function
	68	* called, so any early initialization belongs here.
	69	*
	70	******************************************************************************/
b487867c	71
2368b1a1	72	acpi_status ACPI_INIT_FUNCTION acpi_initialize_subsystem(void)
d978348b BM	73	{
	74	acpi_status status;
	75
	76	ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
	77
	78	acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
	79	ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
	80
	81	/* Initialize the OS-Dependent layer */
	82
	83	status = acpi_os_initialize();
	84	if (ACPI_FAILURE(status)) {
	85	ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
	86	return_ACPI_STATUS(status);
	87	}
	88
	89	/* Initialize all globals used by the subsystem */
	90
	91	status = acpi_ut_init_globals();
	92	if (ACPI_FAILURE(status)) {
	93	ACPI_EXCEPTION((AE_INFO, status,
	94	"During initialization of globals"));
	95	return_ACPI_STATUS(status);
	96	}
	97
	98	/* Create the default mutex objects */
	99
	100	status = acpi_ut_mutex_initialize();
	101	if (ACPI_FAILURE(status)) {
	102	ACPI_EXCEPTION((AE_INFO, status,
	103	"During Global Mutex creation"));
	104	return_ACPI_STATUS(status);
	105	}
	106
	107	/*
	108	* Initialize the namespace manager and
	109	* the root of the namespace tree
	110	*/
	111	status = acpi_ns_root_initialize();
	112	if (ACPI_FAILURE(status)) {
	113	ACPI_EXCEPTION((AE_INFO, status,
	114	"During Namespace initialization"));
	115	return_ACPI_STATUS(status);
	116	}
	117
	118	/* Initialize the global OSI interfaces list with the static names */
	119
	120	status = acpi_ut_initialize_interfaces();
	121	if (ACPI_FAILURE(status)) {
	122	ACPI_EXCEPTION((AE_INFO, status,
	123	"During OSI interfaces initialization"));
	124	return_ACPI_STATUS(status);
	125	}
	126
1a2c4783	127	return_ACPI_STATUS(AE_OK);
d978348b	128	}
d21f600b LZ	129
d21f600b LZ	130	ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)
d978348b BM	131
	132	/*******************************************************************************
	133	*
	134	* FUNCTION: acpi_enable_subsystem
	135	*
	136	* PARAMETERS: flags - Init/enable Options
	137	*
	138	* RETURN: Status
	139	*
	140	* DESCRIPTION: Completes the subsystem initialization including hardware.
	141	* Puts system into ACPI mode if it isn't already.
	142	*
	143	******************************************************************************/
2368b1a1	144	acpi_status ACPI_INIT_FUNCTION acpi_enable_subsystem(u32 flags)
d978348b BM	145	{
	146	acpi_status status = AE_OK;
	147
	148	ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
	149
7b738064 BM	150	/*
	151	* The early initialization phase is complete. The namespace is loaded,
	152	* and we can now support address spaces other than Memory, I/O, and
	153	* PCI_Config.
	154	*/
	155	acpi_gbl_early_initialization = FALSE;
	156
d978348b BM	157	#if (!ACPI_REDUCED_HARDWARE)
	158
	159	/* Enable ACPI mode */
	160
	161	if (!(flags & ACPI_NO_ACPI_ENABLE)) {
	162	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
	163	"[Init] Going into ACPI mode\n"));
	164
	165	acpi_gbl_original_mode = acpi_hw_get_mode();
	166
	167	status = acpi_enable();
	168	if (ACPI_FAILURE(status)) {
	169	ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
	170	return_ACPI_STATUS(status);
	171	}
	172	}
	173
	174	/*
	175	* Obtain a permanent mapping for the FACS. This is required for the
	176	* Global Lock and the Firmware Waking Vector
	177	*/
c04be184 LZ	178	if (!(flags & ACPI_NO_FACS_INIT)) {
	179	status = acpi_tb_initialize_facs();
	180	if (ACPI_FAILURE(status)) {
	181	ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
	182	return_ACPI_STATUS(status);
	183	}
d978348b	184	}
d978348b	185
d978348b BM	186	/*
	187	* Initialize ACPI Event handling (Fixed and General Purpose)
	188	*
	189	* Note1: We must have the hardware and events initialized before we can
	190	* execute any control methods safely. Any control method can require
	191	* ACPI hardware support, so the hardware must be fully initialized before
	192	* any method execution!
	193	*
	194	* Note2: Fixed events are initialized and enabled here. GPEs are
	195	* initialized, but cannot be enabled until after the hardware is
	196	* completely initialized (SCI and global_lock activated) and the various
	197	* initialization control methods are run (_REG, _STA, _INI) on the
	198	* entire namespace.
	199	*/
	200	if (!(flags & ACPI_NO_EVENT_INIT)) {
	201	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
	202	"[Init] Initializing ACPI events\n"));
	203
	204	status = acpi_ev_initialize_events();
	205	if (ACPI_FAILURE(status)) {
	206	return_ACPI_STATUS(status);
	207	}
	208	}
	209
	210	/*
	211	* Install the SCI handler and Global Lock handler. This completes the
	212	* hardware initialization.
	213	*/
	214	if (!(flags & ACPI_NO_HANDLER_INIT)) {
	215	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
	216	"[Init] Installing SCI/GL handlers\n"));
	217
	218	status = acpi_ev_install_xrupt_handlers();
	219	if (ACPI_FAILURE(status)) {
	220	return_ACPI_STATUS(status);
	221	}
	222	}
	223	#endif /* !ACPI_REDUCED_HARDWARE */
	224
	225	return_ACPI_STATUS(status);
	226	}
d21f600b LZ	227
d21f600b LZ	228	ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
d978348b BM	229
	230	/*******************************************************************************
	231	*
	232	* FUNCTION: acpi_initialize_objects
	233	*
	234	* PARAMETERS: flags - Init/enable Options
	235	*
	236	* RETURN: Status
	237	*
	238	* DESCRIPTION: Completes namespace initialization by initializing device
	239	* objects and executing AML code for Regions, buffers, etc.
	240	*
	241	******************************************************************************/
2368b1a1	242	acpi_status ACPI_INIT_FUNCTION acpi_initialize_objects(u32 flags)
d978348b BM	243	{
	244	acpi_status status = AE_OK;
	245
	246	ACPI_FUNCTION_TRACE(acpi_initialize_objects);
	247
b487867c BM	248	#ifdef ACPI_EXEC_APP
	249	/*
	250	* This call implements the "initialization file" option for acpi_exec.
	251	* This is the precise point that we want to perform the overrides.
	252	*/
	253	ae_do_object_overrides();
	254	#endif
d978348b BM	255
	256	/*
	257	* Execute any module-level code that was detected during the table load
	258	* phase. Although illegal since ACPI 2.0, there are many machines that
	259	* contain this type of code. Each block of detected executable AML code
	260	* outside of any control method is wrapped with a temporary control
	261	* method object and placed on a global list. The methods on this list
	262	* are executed below.
2785ce8d BM	263	*
	264	* This case executes the module-level code for all tables only after
	265	* all of the tables have been loaded. It is a legacy option and is
	266	* not compatible with other ACPI implementations. See acpi_ns_load_table.
d978348b	267	*/
de56ba95 LZ	268	if (!acpi_gbl_parse_table_as_term_list
de56ba95 LZ	269	&& acpi_gbl_group_module_level_code) {
2785ce8d	270	acpi_ns_exec_module_code_list();
d978348b	271
5508df89 LZ	272	/*
	273	* Initialize the objects that remain uninitialized. This
	274	* runs the executable AML that may be part of the
	275	* declaration of these objects:
	276	* operation_regions, buffer_fields, Buffers, and Packages.
	277	*/
	278	if (!(flags & ACPI_NO_OBJECT_INIT)) {
	279	status = acpi_ns_initialize_objects();
	280	if (ACPI_FAILURE(status)) {
	281	return_ACPI_STATUS(status);
	282	}
d978348b BM	283	}
	284	}
	285
	286	/*
ced04366 LZ	287	* Initialize all device/region objects in the namespace. This runs
ced04366 LZ	288	* the device _STA and _INI methods and region _REG methods.
d978348b	289	*/
ced04366 LZ	290	if (!(flags & (ACPI_NO_DEVICE_INIT \| ACPI_NO_ADDRESS_SPACE_INIT))) {
ced04366 LZ	291	status = acpi_ns_initialize_devices(flags);
d978348b BM	292	if (ACPI_FAILURE(status)) {
	293	return_ACPI_STATUS(status);
	294	}
	295	}
	296
	297	/*
	298	* Empty the caches (delete the cached objects) on the assumption that
	299	* the table load filled them up more than they will be at runtime --
	300	* thus wasting non-paged memory.
	301	*/
	302	status = acpi_purge_cached_objects();
	303
	304	acpi_gbl_startup_flags \|= ACPI_INITIALIZED_OK;
	305	return_ACPI_STATUS(status);
	306	}
d21f600b LZ	307
d21f600b LZ	308	ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)