[deliverable/linux.git] / drivers / acpi / acpica / utxface.c

/******************************************************************************
 *
 * Module Name: utxface - External interfaces, miscellaneous utility functions
 *
 *****************************************************************************/

/*
 * 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"
#include "acinterp.h"

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utxface")

/*******************************************************************************
 *
 * FUNCTION:    acpi_terminate
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
 *
 ******************************************************************************/
acpi_status acpi_terminate(void)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_terminate);

	/* Just exit if subsystem is already shutdown */

	if (acpi_gbl_shutdown) {
		ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
		return_ACPI_STATUS(AE_OK);
	}

	/* Subsystem appears active, go ahead and shut it down */

	acpi_gbl_shutdown = TRUE;
	acpi_gbl_startup_flags = 0;
	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));

	/* 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);
}

ACPI_EXPORT_SYMBOL(acpi_terminate)

#ifndef ACPI_ASL_COMPILER
#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
 *              initialized successfully.
 *
 ******************************************************************************/
acpi_status acpi_subsystem_status(void)
{

	if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
		return (AE_OK);
	} else {
		return (AE_ERROR);
	}
}

ACPI_EXPORT_SYMBOL(acpi_subsystem_status)

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_system_info
 *
 * PARAMETERS:  out_buffer      - A buffer to receive the resources for the
 *                                device
 *
 * 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;
	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.flags & ACPI_FADT_32BIT_TIMER) {
		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;

	return_ACPI_STATUS(AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_get_system_info)

/*****************************************************************************
 *
 * FUNCTION:    acpi_install_initialization_handler
 *
 * PARAMETERS:  handler             - Callback procedure
 *              function            - Not (currently) used, see below
 *
 * 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);
}

ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
#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);

	(void)acpi_os_purge_cache(acpi_gbl_state_cache);
	(void)acpi_os_purge_cache(acpi_gbl_operand_cache);
	(void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
	(void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);

	return_ACPI_STATUS(AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)

/*****************************************************************************
 *
 * FUNCTION:    acpi_install_interface
 *
 * PARAMETERS:  interface_name      - The interface to install
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Install an _OSI interface to the global list
 *
 ****************************************************************************/
acpi_status acpi_install_interface(acpi_string interface_name)
{
	acpi_status status;
	struct acpi_interface_info *interface_info;

	/* Parameter validation */

	if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
		return (AE_BAD_PARAMETER);
	}

	(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);

	/* Check if the interface name is already in the global list */

	interface_info = acpi_ut_get_interface(interface_name);
	if (interface_info) {
		/*
		 * The interface already exists in the list. This is OK if the
		 * interface has been marked invalid -- just clear the bit.
		 */
		if (interface_info->flags & ACPI_OSI_INVALID) {
			interface_info->flags &= ~ACPI_OSI_INVALID;
			status = AE_OK;
		} else {
			status = AE_ALREADY_EXISTS;
		}
	} else {
		/* New interface name, install into the global list */

		status = acpi_ut_install_interface(interface_name);
	}

	acpi_os_release_mutex(acpi_gbl_osi_mutex);
	return (status);
}

ACPI_EXPORT_SYMBOL(acpi_install_interface)

/*****************************************************************************
 *
 * FUNCTION:    acpi_remove_interface
 *
 * PARAMETERS:  interface_name      - The interface to remove
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Remove an _OSI interface from the global list
 *
 ****************************************************************************/
acpi_status acpi_remove_interface(acpi_string interface_name)
{
	acpi_status status;

	/* Parameter validation */

	if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
		return (AE_BAD_PARAMETER);
	}

	(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);

	status = acpi_ut_remove_interface(interface_name);

	acpi_os_release_mutex(acpi_gbl_osi_mutex);
	return (status);
}

ACPI_EXPORT_SYMBOL(acpi_remove_interface)

/*****************************************************************************
 *
 * FUNCTION:    acpi_install_interface_handler
 *
 * PARAMETERS:  handler             - The _OSI interface handler to install
 *                                    NULL means "remove existing handler"
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
 *              invoked during execution of the internal implementation of
 *              _OSI. A NULL handler simply removes any existing handler.
 *
 ****************************************************************************/
acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
{
	acpi_status status = AE_OK;

	(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);

	if (handler && acpi_gbl_interface_handler) {
		status = AE_ALREADY_EXISTS;
	} else {
		acpi_gbl_interface_handler = handler;
	}

	acpi_os_release_mutex(acpi_gbl_osi_mutex);
	return (status);
}

ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)

/*****************************************************************************
 *
 * FUNCTION:    acpi_check_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              address             - Start address
 *              length              - Length
 *              warn                - TRUE if warning on overlap desired
 *
 * RETURN:      Count of the number of conflicts detected.
 *
 * DESCRIPTION: Check if the input address range overlaps any of the
 *              ASL operation region address ranges.
 *
 ****************************************************************************/
u32
acpi_check_address_range(acpi_adr_space_type space_id,
			 acpi_physical_address address,
			 acpi_size length, u8 warn)
{
	u32 overlaps;
	acpi_status status;

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return (0);
	}

	overlaps = acpi_ut_check_address_range(space_id, address,
					       (u32)length, warn);

	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	return (overlaps);
}

ACPI_EXPORT_SYMBOL(acpi_check_address_range)
#endif				/* !ACPI_ASL_COMPILER */
/*******************************************************************************
 *
 * FUNCTION:    acpi_decode_pld_buffer
 *
 * PARAMETERS:  in_buffer           - Buffer returned by _PLD method
 *              length              - Length of the in_buffer
 *              return_buffer       - Where the decode buffer is returned
 *
 * RETURN:      Status and the decoded _PLD buffer. User must deallocate
 *              the buffer via ACPI_FREE.
 *
 * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
 *              a local struct that is much more useful to an ACPI driver.
 *
 ******************************************************************************/
acpi_status
acpi_decode_pld_buffer(u8 *in_buffer,
		       acpi_size length, struct acpi_pld_info ** return_buffer)
{
	struct acpi_pld_info *pld_info;
	u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
	u32 dword;

	/* Parameter validation */

	if (!in_buffer || !return_buffer || (length < 16)) {
		return (AE_BAD_PARAMETER);
	}

	pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
	if (!pld_info) {
		return (AE_NO_MEMORY);
	}

	/* First 32-bit DWord */

	ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
	pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
	pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
	pld_info->color = ACPI_PLD_GET_COLOR(&dword);

	/* Second 32-bit DWord */

	ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
	pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
	pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);

	/* Third 32-bit DWord */

	ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
	pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
	pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
	pld_info->lid = ACPI_PLD_GET_LID(&dword);
	pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
	pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
	pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
	pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
	pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
	pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
	pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
	pld_info->bay = ACPI_PLD_GET_BAY(&dword);

	/* Fourth 32-bit DWord */

	ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
	pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
	pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
	pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
	pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
	pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
	pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
	pld_info->order = ACPI_PLD_GET_ORDER(&dword);

	if (length >= ACPI_PLD_BUFFER_SIZE) {

		/* Fifth 32-bit DWord (Revision 2 of _PLD) */

		ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
		pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
		pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
	}

	*return_buffer = pld_info;
	return (AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)
Commit	Line	Data
1da177e4 LT	1	/******************************************************************************
1da177e4 LT	2	*
d978348b	3	* Module Name: utxface - External interfaces, miscellaneous utility functions
1da177e4 LT	4	*
	5	*****************************************************************************/
	6
	7	/*
77848130	8	* Copyright (C) 2000 - 2012, Intel Corp.
1da177e4 LT	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
214f2c90	44	#include <linux/export.h>
1da177e4	45	#include <acpi/acpi.h>
e2f7a777 LB	46	#include "accommon.h"
	47	#include "acevents.h"
	48	#include "acnamesp.h"
	49	#include "acdebug.h"
	50	#include "actables.h"
f654c0fe	51	#include "acinterp.h"
1da177e4 LT	52
1da177e4 LT	53	#define _COMPONENT ACPI_UTILITIES
4be44fcd	54	ACPI_MODULE_NAME("utxface")
1da177e4	55
1da177e4 LT	56	/*******************************************************************************
	57	*
	58	* FUNCTION: acpi_terminate
	59	*
	60	* PARAMETERS: None
	61	*
	62	* RETURN: Status
	63	*
2f977b36	64	* DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
1da177e4 LT	65	*
1da177e4 LT	66	******************************************************************************/
4be44fcd	67	acpi_status acpi_terminate(void)
1da177e4	68	{
4be44fcd	69	acpi_status status;
1da177e4	70
b229cf92	71	ACPI_FUNCTION_TRACE(acpi_terminate);
1da177e4	72
2f977b36 BM	73	/* Just exit if subsystem is already shutdown */
	74
	75	if (acpi_gbl_shutdown) {
	76	ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
	77	return_ACPI_STATUS(AE_OK);
	78	}
	79
	80	/* Subsystem appears active, go ahead and shut it down */
	81
	82	acpi_gbl_shutdown = TRUE;
	83	acpi_gbl_startup_flags = 0;
	84	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
	85
1da177e4 LT	86	/* Terminate the AML Debugger if present */
	87
	88	ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
	89
	90	/* Shutdown and free all resources */
	91
4be44fcd	92	acpi_ut_subsystem_shutdown();
1da177e4 LT	93
	94	/* Free the mutex objects */
	95
4be44fcd	96	acpi_ut_mutex_terminate();
1da177e4 LT	97
	98	#ifdef ACPI_DEBUGGER
	99
	100	/* Shut down the debugger */
	101
4be44fcd	102	acpi_db_terminate();
1da177e4 LT	103	#endif
	104
	105	/* Now we can shutdown the OS-dependent layer */
	106
4be44fcd LB	107	status = acpi_os_terminate();
4be44fcd LB	108	return_ACPI_STATUS(status);
1da177e4 LT	109	}
1da177e4 LT	110
8313524a	111	ACPI_EXPORT_SYMBOL(acpi_terminate)
2f977b36	112
e20a679b	113	#ifndef ACPI_ASL_COMPILER
1da177e4	114	#ifdef ACPI_FUTURE_USAGE
44f6c012	115	/*******************************************************************************
1da177e4 LT	116	*
	117	* FUNCTION: acpi_subsystem_status
	118	*
	119	* PARAMETERS: None
	120	*
	121	* RETURN: Status of the ACPI subsystem
	122	*
	123	* DESCRIPTION: Other drivers that use the ACPI subsystem should call this
44f6c012 RM	124	* before making any other calls, to ensure the subsystem
44f6c012 RM	125	* initialized successfully.
1da177e4	126	*
44f6c012	127	******************************************************************************/
4be44fcd	128	acpi_status acpi_subsystem_status(void)
1da177e4	129	{
44f6c012	130
1da177e4 LT	131	if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
1da177e4 LT	132	return (AE_OK);
4be44fcd	133	} else {
1da177e4 LT	134	return (AE_ERROR);
	135	}
	136	}
	137
8313524a BM	138	ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
8313524a BM	139
44f6c012	140	/*******************************************************************************
1da177e4 LT	141	*
	142	* FUNCTION: acpi_get_system_info
	143	*
44f6c012 RM	144	* PARAMETERS: out_buffer - A buffer to receive the resources for the
44f6c012 RM	145	* device
1da177e4	146	*
ba494bee	147	* RETURN: status - the status of the call
1da177e4 LT	148	*
	149	* DESCRIPTION: This function is called to get information about the current
	150	* state of the ACPI subsystem. It will return system information
	151	* in the out_buffer.
	152	*
	153	* If the function fails an appropriate status will be returned
	154	* and the value of out_buffer is undefined.
	155	*
	156	******************************************************************************/
4be44fcd	157	acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
1da177e4	158	{
4be44fcd LB	159	struct acpi_system_info *info_ptr;
4be44fcd LB	160	acpi_status status;
1da177e4	161
b229cf92	162	ACPI_FUNCTION_TRACE(acpi_get_system_info);
1da177e4 LT	163
	164	/* Parameter validation */
	165
4be44fcd LB	166	status = acpi_ut_validate_buffer(out_buffer);
	167	if (ACPI_FAILURE(status)) {
	168	return_ACPI_STATUS(status);
1da177e4 LT	169	}
	170
	171	/* Validate/Allocate/Clear caller buffer */
	172
4be44fcd LB	173	status =
	174	acpi_ut_initialize_buffer(out_buffer,
	175	sizeof(struct acpi_system_info));
	176	if (ACPI_FAILURE(status)) {
	177	return_ACPI_STATUS(status);
1da177e4 LT	178	}
	179
	180	/*
	181	* Populate the return buffer
	182	*/
4be44fcd	183	info_ptr = (struct acpi_system_info *)out_buffer->pointer;
1da177e4	184
4be44fcd	185	info_ptr->acpi_ca_version = ACPI_CA_VERSION;
1da177e4 LT	186
	187	/* System flags (ACPI capabilities) */
	188
4be44fcd	189	info_ptr->flags = ACPI_SYS_MODE_ACPI;
1da177e4 LT	190
	191	/* Timer resolution - 24 or 32 bits */
	192
f3d2e786	193	if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
1da177e4	194	info_ptr->timer_resolution = 24;
4be44fcd	195	} else {
1da177e4 LT	196	info_ptr->timer_resolution = 32;
	197	}
	198
	199	/* Clear the reserved fields */
	200
4be44fcd LB	201	info_ptr->reserved1 = 0;
4be44fcd LB	202	info_ptr->reserved2 = 0;
1da177e4 LT	203
	204	/* Current debug levels */
	205
4be44fcd LB	206	info_ptr->debug_layer = acpi_dbg_layer;
4be44fcd LB	207	info_ptr->debug_level = acpi_dbg_level;
1da177e4	208
4be44fcd	209	return_ACPI_STATUS(AE_OK);
1da177e4	210	}
1da177e4	211
8313524a	212	ACPI_EXPORT_SYMBOL(acpi_get_system_info)
1da177e4 LT	213
	214	/*****************************************************************************
	215	*
	216	* FUNCTION: acpi_install_initialization_handler
	217	*
ba494bee BM	218	* PARAMETERS: handler - Callback procedure
ba494bee BM	219	* function - Not (currently) used, see below
1da177e4 LT	220	*
	221	* RETURN: Status
	222	*
	223	* DESCRIPTION: Install an initialization handler
	224	*
	225	* TBD: When a second function is added, must save the Function also.
	226	*
	227	****************************************************************************/
1da177e4	228	acpi_status
4be44fcd	229	acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
1da177e4 LT	230	{
	231
	232	if (!handler) {
	233	return (AE_BAD_PARAMETER);
	234	}
	235
	236	if (acpi_gbl_init_handler) {
	237	return (AE_ALREADY_EXISTS);
	238	}
	239
	240	acpi_gbl_init_handler = handler;
68aafc35	241	return (AE_OK);
1da177e4 LT	242	}
1da177e4 LT	243
8313524a	244	ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
4be44fcd	245	#endif /* ACPI_FUTURE_USAGE */
b0ed7a91	246
1da177e4 LT	247	/*****************************************************************************
	248	*
	249	* FUNCTION: acpi_purge_cached_objects
	250	*
	251	* PARAMETERS: None
	252	*
	253	* RETURN: Status
	254	*
	255	* DESCRIPTION: Empty all caches (delete the cached objects)
	256	*
	257	****************************************************************************/
4be44fcd	258	acpi_status acpi_purge_cached_objects(void)
1da177e4	259	{
b229cf92	260	ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
1da177e4	261
4be44fcd LB	262	(void)acpi_os_purge_cache(acpi_gbl_state_cache);
	263	(void)acpi_os_purge_cache(acpi_gbl_operand_cache);
	264	(void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
	265	(void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
68aafc35	266
4be44fcd	267	return_ACPI_STATUS(AE_OK);
1da177e4	268	}
8313524a BM	269
8313524a BM	270	ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
b0ed7a91 LM	271
	272	/*****************************************************************************
	273	*
	274	* FUNCTION: acpi_install_interface
	275	*
	276	* PARAMETERS: interface_name - The interface to install
	277	*
	278	* RETURN: Status
	279	*
	280	* DESCRIPTION: Install an _OSI interface to the global list
	281	*
	282	****************************************************************************/
	283	acpi_status acpi_install_interface(acpi_string interface_name)
	284	{
	285	acpi_status status;
	286	struct acpi_interface_info *interface_info;
	287
	288	/* Parameter validation */
	289
	290	if (!interface_name \|\| (ACPI_STRLEN(interface_name) == 0)) {
	291	return (AE_BAD_PARAMETER);
	292	}
	293
	294	(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
	295
	296	/* Check if the interface name is already in the global list */
	297
	298	interface_info = acpi_ut_get_interface(interface_name);
	299	if (interface_info) {
	300	/*
	301	* The interface already exists in the list. This is OK if the
	302	* interface has been marked invalid -- just clear the bit.
	303	*/
	304	if (interface_info->flags & ACPI_OSI_INVALID) {
	305	interface_info->flags &= ~ACPI_OSI_INVALID;
	306	status = AE_OK;
	307	} else {
	308	status = AE_ALREADY_EXISTS;
	309	}
	310	} else {
	311	/* New interface name, install into the global list */
	312
	313	status = acpi_ut_install_interface(interface_name);
	314	}
	315
	316	acpi_os_release_mutex(acpi_gbl_osi_mutex);
	317	return (status);
	318	}
	319
	320	ACPI_EXPORT_SYMBOL(acpi_install_interface)
	321
	322	/*****************************************************************************
	323	*
	324	* FUNCTION: acpi_remove_interface
	325	*
	326	* PARAMETERS: interface_name - The interface to remove
	327	*
	328	* RETURN: Status
	329	*
	330	* DESCRIPTION: Remove an _OSI interface from the global list
	331	*
	332	****************************************************************************/
	333	acpi_status acpi_remove_interface(acpi_string interface_name)
	334	{
335	acpi_status status;
336
337	/* Parameter validation */
338
339	if (!interface_name \|\| (ACPI_STRLEN(interface_name) == 0)) {
340	return (AE_BAD_PARAMETER);
341	}
342
343	(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
344
345	status = acpi_ut_remove_interface(interface_name);
346
347	acpi_os_release_mutex(acpi_gbl_osi_mutex);
348	return (status);
349	}
350
351	ACPI_EXPORT_SYMBOL(acpi_remove_interface)
352
353	/*****************************************************************************
354	*
355	* FUNCTION: acpi_install_interface_handler
356	*
ba494bee	357	* PARAMETERS: handler - The _OSI interface handler to install
b0ed7a91 LM	358	* NULL means "remove existing handler"
	359	*
	360	* RETURN: Status
	361	*
	362	* DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
	363	* invoked during execution of the internal implementation of
	364	* _OSI. A NULL handler simply removes any existing handler.
	365	*
	366	****************************************************************************/
	367	acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
	368	{
	369	acpi_status status = AE_OK;
	370
	371	(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
	372
	373	if (handler && acpi_gbl_interface_handler) {
	374	status = AE_ALREADY_EXISTS;
	375	} else {
	376	acpi_gbl_interface_handler = handler;
	377	}
	378
	379	acpi_os_release_mutex(acpi_gbl_osi_mutex);
	380	return (status);
	381	}
	382
	383	ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
f654c0fe LM	384
	385	/*****************************************************************************
	386	*
	387	* FUNCTION: acpi_check_address_range
	388	*
	389	* PARAMETERS: space_id - Address space ID
ba494bee BM	390	* address - Start address
	391	* length - Length
	392	* warn - TRUE if warning on overlap desired
f654c0fe LM	393	*
	394	* RETURN: Count of the number of conflicts detected.
	395	*
	396	* DESCRIPTION: Check if the input address range overlaps any of the
	397	* ASL operation region address ranges.
	398	*
	399	****************************************************************************/
	400	u32
	401	acpi_check_address_range(acpi_adr_space_type space_id,
	402	acpi_physical_address address,
	403	acpi_size length, u8 warn)
	404	{
	405	u32 overlaps;
	406	acpi_status status;
	407
	408	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	409	if (ACPI_FAILURE(status)) {
	410	return (0);
	411	}
	412
	413	overlaps = acpi_ut_check_address_range(space_id, address,
	414	(u32)length, warn);
	415
	416	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	417	return (overlaps);
	418	}
	419
	420	ACPI_EXPORT_SYMBOL(acpi_check_address_range)
b0ed7a91	421	#endif /* !ACPI_ASL_COMPILER */
be030a57 BM	422	/*******************************************************************************
	423	*
	424	* FUNCTION: acpi_decode_pld_buffer
	425	*
	426	* PARAMETERS: in_buffer - Buffer returned by _PLD method
	427	* length - Length of the in_buffer
	428	* return_buffer - Where the decode buffer is returned
	429	*
	430	* RETURN: Status and the decoded _PLD buffer. User must deallocate
	431	* the buffer via ACPI_FREE.
	432	*
	433	* DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
	434	* a local struct that is much more useful to an ACPI driver.
	435	*
	436	******************************************************************************/
	437	acpi_status
	438	acpi_decode_pld_buffer(u8 *in_buffer,
	439	acpi_size length, struct acpi_pld_info ** return_buffer)
	440	{
	441	struct acpi_pld_info *pld_info;
	442	u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
	443	u32 dword;
	444
	445	/* Parameter validation */
	446
	447	if (!in_buffer \|\| !return_buffer \|\| (length < 16)) {
	448	return (AE_BAD_PARAMETER);
	449	}
	450
	451	pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
	452	if (!pld_info) {
	453	return (AE_NO_MEMORY);
	454	}
	455
	456	/* First 32-bit DWord */
	457
	458	ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
	459	pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
	460	pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
	461	pld_info->color = ACPI_PLD_GET_COLOR(&dword);
	462
	463	/* Second 32-bit DWord */
	464
	465	ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
	466	pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
	467	pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);
	468
	469	/* Third 32-bit DWord */
	470
	471	ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
	472	pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
	473	pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
	474	pld_info->lid = ACPI_PLD_GET_LID(&dword);
	475	pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
	476	pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
	477	pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
	478	pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
	479	pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
	480	pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
	481	pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
	482	pld_info->bay = ACPI_PLD_GET_BAY(&dword);
	483
	484	/* Fourth 32-bit DWord */
	485
486	ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
487	pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
488	pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
489	pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
490	pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
491	pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
492	pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
493	pld_info->order = ACPI_PLD_GET_ORDER(&dword);
494
495	if (length >= ACPI_PLD_BUFFER_SIZE) {
496
497	/* Fifth 32-bit DWord (Revision 2 of _PLD) */
498
499	ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
500	pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
501	pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
502	}
503
504	*return_buffer = pld_info;
505	return (AE_OK);
506	}
507
508	ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)