[linux-2.6-block.git] / drivers / acpi / acpica / tbxfload.c

/******************************************************************************
 *
 * Module Name: tbxfload - Table load/unload external interfaces
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2015, 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 "acnamesp.h"
#include "actables.h"

#define _COMPONENT          ACPI_TABLES
ACPI_MODULE_NAME("tbxfload")

/* Local prototypes */
static acpi_status acpi_tb_load_namespace(void);

/*******************************************************************************
 *
 * FUNCTION:    acpi_load_tables
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
 *
 ******************************************************************************/

acpi_status __init acpi_load_tables(void)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_load_tables);

	/* Load the namespace from the tables */

	status = acpi_tb_load_namespace();
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status,
				"While loading namespace from ACPI tables"));
	}

	return_ACPI_STATUS(status);
}

ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables)

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_load_namespace
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
 *              the RSDT/XSDT.
 *
 ******************************************************************************/
static acpi_status acpi_tb_load_namespace(void)
{
	acpi_status status;
	u32 i;
	struct acpi_table_header *new_dsdt;

	ACPI_FUNCTION_TRACE(tb_load_namespace);

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	/*
	 * Load the namespace. The DSDT is required, but any SSDT and
	 * PSDT tables are optional. Verify the DSDT.
	 */
	if (!acpi_gbl_root_table_list.current_table_count ||
	    !ACPI_COMPARE_NAME(&
			       (acpi_gbl_root_table_list.
				tables[ACPI_TABLE_INDEX_DSDT].signature),
			       ACPI_SIG_DSDT)
	    ||
	    ACPI_FAILURE(acpi_tb_validate_table
			 (&acpi_gbl_root_table_list.
			  tables[ACPI_TABLE_INDEX_DSDT]))) {
		status = AE_NO_ACPI_TABLES;
		goto unlock_and_exit;
	}

	/*
	 * Save the DSDT pointer for simple access. This is the mapped memory
	 * address. We must take care here because the address of the .Tables
	 * array can change dynamically as tables are loaded at run-time. Note:
	 * .Pointer field is not validated until after call to acpi_tb_validate_table.
	 */
	acpi_gbl_DSDT =
	    acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer;

	/*
	 * Optionally copy the entire DSDT to local memory (instead of simply
	 * mapping it.) There are some BIOSs that corrupt or replace the original
	 * DSDT, creating the need for this option. Default is FALSE, do not copy
	 * the DSDT.
	 */
	if (acpi_gbl_copy_dsdt_locally) {
		new_dsdt = acpi_tb_copy_dsdt(ACPI_TABLE_INDEX_DSDT);
		if (new_dsdt) {
			acpi_gbl_DSDT = new_dsdt;
		}
	}

	/*
	 * Save the original DSDT header for detection of table corruption
	 * and/or replacement of the DSDT from outside the OS.
	 */
	memcpy(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,
	       sizeof(struct acpi_table_header));

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);

	/* Load and parse tables */

	status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
		if (!acpi_gbl_root_table_list.tables[i].address ||
		    (!ACPI_COMPARE_NAME
		     (&(acpi_gbl_root_table_list.tables[i].signature),
		      ACPI_SIG_SSDT)
		     &&
		     !ACPI_COMPARE_NAME(&
					(acpi_gbl_root_table_list.tables[i].
					 signature), ACPI_SIG_PSDT)
		     &&
		     !ACPI_COMPARE_NAME(&
					(acpi_gbl_root_table_list.tables[i].
					 signature), ACPI_SIG_OSDT))
		    ||
		    ACPI_FAILURE(acpi_tb_validate_table
				 (&acpi_gbl_root_table_list.tables[i]))) {
			continue;
		}

		/* Ignore errors while loading tables, get as many as possible */

		(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
		(void)acpi_ns_load_table(i, acpi_gbl_root_node);
		(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	}

	ACPI_INFO((AE_INFO, "All ACPI Tables successfully acquired"));

unlock_and_exit:
	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_install_table
 *
 * PARAMETERS:  address             - Address of the ACPI table to be installed.
 *              physical            - Whether the address is a physical table
 *                                    address or not
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Dynamically install an ACPI table.
 *              Note: This function should only be invoked after
 *                    acpi_initialize_tables() and before acpi_load_tables().
 *
 ******************************************************************************/

acpi_status __init
acpi_install_table(acpi_physical_address address, u8 physical)
{
	acpi_status status;
	u8 flags;
	u32 table_index;

	ACPI_FUNCTION_TRACE(acpi_install_table);

	if (physical) {
		flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL;
	} else {
		flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL;
	}

	status = acpi_tb_install_standard_table(address, flags,
						FALSE, FALSE, &table_index);

	return_ACPI_STATUS(status);
}

ACPI_EXPORT_SYMBOL_INIT(acpi_install_table)

/*******************************************************************************
 *
 * FUNCTION:    acpi_load_table
 *
 * PARAMETERS:  table               - Pointer to a buffer containing the ACPI
 *                                    table to be loaded.
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
 *              be a valid ACPI table with a valid ACPI table header.
 *              Note1: Mainly intended to support hotplug addition of SSDTs.
 *              Note2: Does not copy the incoming table. User is responsible
 *              to ensure that the table is not deleted or unmapped.
 *
 ******************************************************************************/
acpi_status acpi_load_table(struct acpi_table_header *table)
{
	acpi_status status;
	u32 table_index;

	ACPI_FUNCTION_TRACE(acpi_load_table);

	/* Parameter validation */

	if (!table) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	/* Must acquire the interpreter lock during this operation */

	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Install the table and load it into the namespace */

	ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table),
						ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
						TRUE, FALSE, &table_index);

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	if (ACPI_FAILURE(status)) {
		goto unlock_and_exit;
	}

	/*
	 * Note: Now table is "INSTALLED", it must be validated before
	 * using.
	 */
	status =
	    acpi_tb_validate_table(&acpi_gbl_root_table_list.
				   tables[table_index]);
	if (ACPI_FAILURE(status)) {
		goto unlock_and_exit;
	}

	status = acpi_ns_load_table(table_index, acpi_gbl_root_node);

	/* Invoke table handler if present */

	if (acpi_gbl_table_handler) {
		(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
					     acpi_gbl_table_handler_context);
	}

unlock_and_exit:
	(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
	return_ACPI_STATUS(status);
}

ACPI_EXPORT_SYMBOL(acpi_load_table)

/*******************************************************************************
 *
 * FUNCTION:    acpi_unload_parent_table
 *
 * PARAMETERS:  object              - Handle to any namespace object owned by
 *                                    the table to be unloaded
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
 *              the table and deletes all namespace objects associated with
 *              that table. Unloading of the DSDT is not allowed.
 *              Note: Mainly intended to support hotplug removal of SSDTs.
 *
 ******************************************************************************/
acpi_status acpi_unload_parent_table(acpi_handle object)
{
	struct acpi_namespace_node *node =
	    ACPI_CAST_PTR(struct acpi_namespace_node, object);
	acpi_status status = AE_NOT_EXIST;
	acpi_owner_id owner_id;
	u32 i;

	ACPI_FUNCTION_TRACE(acpi_unload_parent_table);

	/* Parameter validation */

	if (!object) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	/*
	 * The node owner_id is currently the same as the parent table ID.
	 * However, this could change in the future.
	 */
	owner_id = node->owner_id;
	if (!owner_id) {

		/* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */

		return_ACPI_STATUS(AE_TYPE);
	}

	/* Must acquire the interpreter lock during this operation */

	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Find the table in the global table list */

	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
		if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) {
			continue;
		}

		/*
		 * Allow unload of SSDT and OEMx tables only. Do not allow unload
		 * of the DSDT. No other types of tables should get here, since
		 * only these types can contain AML and thus are the only types
		 * that can create namespace objects.
		 */
		if (ACPI_COMPARE_NAME
		    (acpi_gbl_root_table_list.tables[i].signature.ascii,
		     ACPI_SIG_DSDT)) {
			status = AE_TYPE;
			break;
		}

		/* Ensure the table is actually loaded */

		if (!acpi_tb_is_table_loaded(i)) {
			status = AE_NOT_EXIST;
			break;
		}

		/* Invoke table handler if present */

		if (acpi_gbl_table_handler) {
			(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
						     acpi_gbl_root_table_list.
						     tables[i].pointer,
						     acpi_gbl_table_handler_context);
		}

		/*
		 * Delete all namespace objects owned by this table. Note that
		 * these objects can appear anywhere in the namespace by virtue
		 * of the AML "Scope" operator. Thus, we need to track ownership
		 * by an ID, not simply a position within the hierarchy.
		 */
		status = acpi_tb_delete_namespace_by_owner(i);
		if (ACPI_FAILURE(status)) {
			break;
		}

		status = acpi_tb_release_owner_id(i);
		acpi_tb_set_table_loaded_flag(i, FALSE);
		break;
	}

	(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
	return_ACPI_STATUS(status);
}

ACPI_EXPORT_SYMBOL(acpi_unload_parent_table)
Commit	Line	Data
d59b8ecd BM	1	/******************************************************************************
	2	*
	3	* Module Name: tbxfload - Table load/unload external interfaces
	4	*
	5	*****************************************************************************/
	6
	7	/*
82a80941	8	* Copyright (C) 2000 - 2015, Intel Corp.
d59b8ecd 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
d59b8ecd BM	46	#include <acpi/acpi.h>
	47	#include "accommon.h"
	48	#include "acnamesp.h"
	49	#include "actables.h"
	50
	51	#define _COMPONENT ACPI_TABLES
	52	ACPI_MODULE_NAME("tbxfload")
	53
	54	/* Local prototypes */
	55	static acpi_status acpi_tb_load_namespace(void);
	56
d59b8ecd BM	57	/*******************************************************************************
	58	*
	59	* FUNCTION: acpi_load_tables
	60	*
	61	* PARAMETERS: None
	62	*
	63	* RETURN: Status
	64	*
	65	* DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
	66	*
	67	******************************************************************************/
	68
45c9f78b	69	acpi_status __init acpi_load_tables(void)
d59b8ecd BM	70	{
	71	acpi_status status;
	72
	73	ACPI_FUNCTION_TRACE(acpi_load_tables);
	74
	75	/* Load the namespace from the tables */
	76
	77	status = acpi_tb_load_namespace();
	78	if (ACPI_FAILURE(status)) {
	79	ACPI_EXCEPTION((AE_INFO, status,
	80	"While loading namespace from ACPI tables"));
	81	}
	82
	83	return_ACPI_STATUS(status);
	84	}
	85
d21f600b	86	ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables)
d59b8ecd BM	87
	88	/*******************************************************************************
	89	*
	90	* FUNCTION: acpi_tb_load_namespace
	91	*
	92	* PARAMETERS: None
	93	*
	94	* RETURN: Status
	95	*
	96	* DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
	97	* the RSDT/XSDT.
	98	*
	99	******************************************************************************/
	100	static acpi_status acpi_tb_load_namespace(void)
	101	{
	102	acpi_status status;
	103	u32 i;
	104	struct acpi_table_header *new_dsdt;
	105
	106	ACPI_FUNCTION_TRACE(tb_load_namespace);
	107
	108	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	109
	110	/*
	111	* Load the namespace. The DSDT is required, but any SSDT and
	112	* PSDT tables are optional. Verify the DSDT.
	113	*/
	114	if (!acpi_gbl_root_table_list.current_table_count \|\|
	115	!ACPI_COMPARE_NAME(&
	116	(acpi_gbl_root_table_list.
	117	tables[ACPI_TABLE_INDEX_DSDT].signature),
	118	ACPI_SIG_DSDT)
	119	\|\|
7f9fc99c	120	ACPI_FAILURE(acpi_tb_validate_table
d59b8ecd BM	121	(&acpi_gbl_root_table_list.
	122	tables[ACPI_TABLE_INDEX_DSDT]))) {
	123	status = AE_NO_ACPI_TABLES;
	124	goto unlock_and_exit;
	125	}
	126
	127	/*
	128	* Save the DSDT pointer for simple access. This is the mapped memory
	129	* address. We must take care here because the address of the .Tables
	130	* array can change dynamically as tables are loaded at run-time. Note:
7f9fc99c	131	* .Pointer field is not validated until after call to acpi_tb_validate_table.
d59b8ecd BM	132	*/
	133	acpi_gbl_DSDT =
	134	acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer;
	135
	136	/*
	137	* Optionally copy the entire DSDT to local memory (instead of simply
	138	* mapping it.) There are some BIOSs that corrupt or replace the original
	139	* DSDT, creating the need for this option. Default is FALSE, do not copy
	140	* the DSDT.
	141	*/
	142	if (acpi_gbl_copy_dsdt_locally) {
	143	new_dsdt = acpi_tb_copy_dsdt(ACPI_TABLE_INDEX_DSDT);
	144	if (new_dsdt) {
	145	acpi_gbl_DSDT = new_dsdt;
	146	}
	147	}
	148
	149	/*
	150	* Save the original DSDT header for detection of table corruption
	151	* and/or replacement of the DSDT from outside the OS.
	152	*/
4fa4616e BM	153	memcpy(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,
4fa4616e BM	154	sizeof(struct acpi_table_header));
d59b8ecd BM	155
	156	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	157
	158	/* Load and parse tables */
	159
	160	status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node);
	161	if (ACPI_FAILURE(status)) {
	162	return_ACPI_STATUS(status);
	163	}
	164
	165	/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
	166
	167	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	168	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
c04e1fb4 LZ	169	if (!acpi_gbl_root_table_list.tables[i].address \|\|
c04e1fb4 LZ	170	(!ACPI_COMPARE_NAME
d59b8ecd BM	171	(&(acpi_gbl_root_table_list.tables[i].signature),
	172	ACPI_SIG_SSDT)
	173	&&
	174	!ACPI_COMPARE_NAME(&
	175	(acpi_gbl_root_table_list.tables[i].
fe536995 BM	176	signature), ACPI_SIG_PSDT)
	177	&&
	178	!ACPI_COMPARE_NAME(&
	179	(acpi_gbl_root_table_list.tables[i].
	180	signature), ACPI_SIG_OSDT))
d59b8ecd	181	\|\|
7f9fc99c	182	ACPI_FAILURE(acpi_tb_validate_table
d59b8ecd BM	183	(&acpi_gbl_root_table_list.tables[i]))) {
	184	continue;
	185	}
	186
d59b8ecd BM	187	/* Ignore errors while loading tables, get as many as possible */
	188
	189	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	190	(void)acpi_ns_load_table(i, acpi_gbl_root_node);
	191	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	192	}
	193
3e5621a7	194	ACPI_INFO((AE_INFO, "All ACPI Tables successfully acquired"));
d59b8ecd	195
10622bf8	196	unlock_and_exit:
d59b8ecd BM	197	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	198	return_ACPI_STATUS(status);
	199	}
	200
caf4a15c LZ	201	/*******************************************************************************
	202	*
	203	* FUNCTION: acpi_install_table
	204	*
	205	* PARAMETERS: address - Address of the ACPI table to be installed.
	206	* physical - Whether the address is a physical table
	207	* address or not
	208	*
	209	* RETURN: Status
	210	*
	211	* DESCRIPTION: Dynamically install an ACPI table.
	212	* Note: This function should only be invoked after
	213	* acpi_initialize_tables() and before acpi_load_tables().
	214	*
	215	******************************************************************************/
	216
	217	acpi_status __init
	218	acpi_install_table(acpi_physical_address address, u8 physical)
	219	{
	220	acpi_status status;
	221	u8 flags;
	222	u32 table_index;
	223
	224	ACPI_FUNCTION_TRACE(acpi_install_table);
	225
	226	if (physical) {
ed6f1d44	227	flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL;
dc00203b ZR	228	} else {
dc00203b ZR	229	flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL;
caf4a15c LZ	230	}
caf4a15c LZ	231
ed6f1d44 BM	232	status = acpi_tb_install_standard_table(address, flags,
ed6f1d44 BM	233	FALSE, FALSE, &table_index);
caf4a15c LZ	234
	235	return_ACPI_STATUS(status);
	236	}
	237
	238	ACPI_EXPORT_SYMBOL_INIT(acpi_install_table)
	239
f60d8181 BM	240	/*******************************************************************************
	241	*
	242	* FUNCTION: acpi_load_table
	243	*
	244	* PARAMETERS: table - Pointer to a buffer containing the ACPI
	245	* table to be loaded.
	246	*
	247	* RETURN: Status
	248	*
	249	* DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
	250	* be a valid ACPI table with a valid ACPI table header.
	251	* Note1: Mainly intended to support hotplug addition of SSDTs.
691fda50	252	* Note2: Does not copy the incoming table. User is responsible
f60d8181 BM	253	* to ensure that the table is not deleted or unmapped.
	254	*
	255	******************************************************************************/
f60d8181 BM	256	acpi_status acpi_load_table(struct acpi_table_header *table)
	257	{
	258	acpi_status status;
f60d8181 BM	259	u32 table_index;
	260
	261	ACPI_FUNCTION_TRACE(acpi_load_table);
	262
	263	/* Parameter validation */
	264
	265	if (!table) {
	266	return_ACPI_STATUS(AE_BAD_PARAMETER);
	267	}
	268
f60d8181 BM	269	/* Must acquire the interpreter lock during this operation */
	270
	271	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
	272	if (ACPI_FAILURE(status)) {
	273	return_ACPI_STATUS(status);
	274	}
	275
	276	/* Install the table and load it into the namespace */
	277
	278	ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
86dfc6f3	279	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
ed6f1d44 BM	280
	281	status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table),
	282	ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
	283	TRUE, FALSE, &table_index);
	284
86dfc6f3 LZ	285	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	286	if (ACPI_FAILURE(status)) {
	287	goto unlock_and_exit;
	288	}
	289
	290	/*
	291	* Note: Now table is "INSTALLED", it must be validated before
	292	* using.
	293	*/
	294	status =
	295	acpi_tb_validate_table(&acpi_gbl_root_table_list.
	296	tables[table_index]);
f60d8181 BM	297	if (ACPI_FAILURE(status)) {
	298	goto unlock_and_exit;
	299	}
	300
	301	status = acpi_ns_load_table(table_index, acpi_gbl_root_node);
	302
	303	/* Invoke table handler if present */
	304
	305	if (acpi_gbl_table_handler) {
	306	(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
	307	acpi_gbl_table_handler_context);
	308	}
	309
10622bf8	310	unlock_and_exit:
f60d8181 BM	311	(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
	312	return_ACPI_STATUS(status);
	313	}
	314
	315	ACPI_EXPORT_SYMBOL(acpi_load_table)
	316
	317	/*******************************************************************************
	318	*
	319	* FUNCTION: acpi_unload_parent_table
	320	*
	321	* PARAMETERS: object - Handle to any namespace object owned by
	322	* the table to be unloaded
	323	*
	324	* RETURN: Status
	325	*
	326	* DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
	327	* the table and deletes all namespace objects associated with
	328	* that table. Unloading of the DSDT is not allowed.
	329	* Note: Mainly intended to support hotplug removal of SSDTs.
	330	*
	331	******************************************************************************/
	332	acpi_status acpi_unload_parent_table(acpi_handle object)
	333	{
	334	struct acpi_namespace_node *node =
	335	ACPI_CAST_PTR(struct acpi_namespace_node, object);
	336	acpi_status status = AE_NOT_EXIST;
	337	acpi_owner_id owner_id;
	338	u32 i;
	339
	340	ACPI_FUNCTION_TRACE(acpi_unload_parent_table);
	341
	342	/* Parameter validation */
	343
	344	if (!object) {
	345	return_ACPI_STATUS(AE_BAD_PARAMETER);
	346	}
	347
	348	/*
	349	* The node owner_id is currently the same as the parent table ID.
	350	* However, this could change in the future.
	351	*/
	352	owner_id = node->owner_id;
	353	if (!owner_id) {
	354
	355	/* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */
	356
	357	return_ACPI_STATUS(AE_TYPE);
	358	}
	359
	360	/* Must acquire the interpreter lock during this operation */
	361
	362	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
	363	if (ACPI_FAILURE(status)) {
	364	return_ACPI_STATUS(status);
	365	}
	366
	367	/* Find the table in the global table list */
	368
	369	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
	370	if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) {
	371	continue;
	372	}
	373
	374	/*
375	* Allow unload of SSDT and OEMx tables only. Do not allow unload
376	* of the DSDT. No other types of tables should get here, since
377	* only these types can contain AML and thus are the only types
378	* that can create namespace objects.
379	*/
380	if (ACPI_COMPARE_NAME
381	(acpi_gbl_root_table_list.tables[i].signature.ascii,
382	ACPI_SIG_DSDT)) {
383	status = AE_TYPE;
384	break;
385	}
386
387	/* Ensure the table is actually loaded */
388
389	if (!acpi_tb_is_table_loaded(i)) {
390	status = AE_NOT_EXIST;
391	break;
392	}
393
394	/* Invoke table handler if present */
395
396	if (acpi_gbl_table_handler) {
397	(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
398	acpi_gbl_root_table_list.
399	tables[i].pointer,
400	acpi_gbl_table_handler_context);
401	}
402
403	/*
404	* Delete all namespace objects owned by this table. Note that
405	* these objects can appear anywhere in the namespace by virtue
406	* of the AML "Scope" operator. Thus, we need to track ownership
407	* by an ID, not simply a position within the hierarchy.
408	*/
409	status = acpi_tb_delete_namespace_by_owner(i);
410	if (ACPI_FAILURE(status)) {
411	break;
412	}
413
414	status = acpi_tb_release_owner_id(i);
415	acpi_tb_set_table_loaded_flag(i, FALSE);
416	break;
417	}
418
419	(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
420	return_ACPI_STATUS(status);
421	}
422
423	ACPI_EXPORT_SYMBOL(acpi_unload_parent_table)