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

/******************************************************************************
 *
 * Module Name: psxface - Parser external interfaces
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2013, 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 <acpi/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "acdispat.h"
#include "acinterp.h"
#include "actables.h"

#define _COMPONENT          ACPI_PARSER
ACPI_MODULE_NAME("psxface")

/* Local Prototypes */
static void acpi_ps_start_trace(struct acpi_evaluate_info *info);

static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);

static void
acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);

/*******************************************************************************
 *
 * FUNCTION:    acpi_debug_trace
 *
 * PARAMETERS:  method_name     - Valid ACPI name string
 *              debug_level     - Optional level mask. 0 to use default
 *              debug_layer     - Optional layer mask. 0 to use default
 *              flags           - bit 1: one shot(1) or persistent(0)
 *
 * RETURN:      Status
 *
 * DESCRIPTION: External interface to enable debug tracing during control
 *              method execution
 *
 ******************************************************************************/

acpi_status
acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
{
	acpi_status status;

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

	/* TBDs: Validate name, allow full path or just nameseg */

	acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
	acpi_gbl_trace_flags = flags;

	if (debug_level) {
		acpi_gbl_trace_dbg_level = debug_level;
	}
	if (debug_layer) {
		acpi_gbl_trace_dbg_layer = debug_layer;
	}

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

/*******************************************************************************
 *
 * FUNCTION:    acpi_ps_start_trace
 *
 * PARAMETERS:  info        - Method info struct
 *
 * RETURN:      None
 *
 * DESCRIPTION: Start control method execution trace
 *
 ******************************************************************************/

static void acpi_ps_start_trace(struct acpi_evaluate_info *info)
{
	acpi_status status;

	ACPI_FUNCTION_ENTRY();

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

	if ((!acpi_gbl_trace_method_name) ||
	    (acpi_gbl_trace_method_name != info->node->name.integer)) {
		goto exit;
	}

	acpi_gbl_original_dbg_level = acpi_dbg_level;
	acpi_gbl_original_dbg_layer = acpi_dbg_layer;

	acpi_dbg_level = 0x00FFFFFF;
	acpi_dbg_layer = ACPI_UINT32_MAX;

	if (acpi_gbl_trace_dbg_level) {
		acpi_dbg_level = acpi_gbl_trace_dbg_level;
	}
	if (acpi_gbl_trace_dbg_layer) {
		acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
	}

      exit:
	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ps_stop_trace
 *
 * PARAMETERS:  info        - Method info struct
 *
 * RETURN:      None
 *
 * DESCRIPTION: Stop control method execution trace
 *
 ******************************************************************************/

static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)
{
	acpi_status status;

	ACPI_FUNCTION_ENTRY();

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

	if ((!acpi_gbl_trace_method_name) ||
	    (acpi_gbl_trace_method_name != info->node->name.integer)) {
		goto exit;
	}

	/* Disable further tracing if type is one-shot */

	if (acpi_gbl_trace_flags & 1) {
		acpi_gbl_trace_method_name = 0;
		acpi_gbl_trace_dbg_level = 0;
		acpi_gbl_trace_dbg_layer = 0;
	}

	acpi_dbg_level = acpi_gbl_original_dbg_level;
	acpi_dbg_layer = acpi_gbl_original_dbg_layer;

      exit:
	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ps_execute_method
 *
 * PARAMETERS:  info            - Method info block, contains:
 *                  node            - Method Node to execute
 *                  obj_desc        - Method object
 *                  parameters      - List of parameters to pass to the method,
 *                                    terminated by NULL. Params itself may be
 *                                    NULL if no parameters are being passed.
 *                  return_object   - Where to put method's return value (if
 *                                    any). If NULL, no value is returned.
 *                  parameter_type  - Type of Parameter list
 *                  return_object   - Where to put method's return value (if
 *                                    any). If NULL, no value is returned.
 *                  pass_number     - Parse or execute pass
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Execute a control method
 *
 ******************************************************************************/

acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
{
	acpi_status status;
	union acpi_parse_object *op;
	struct acpi_walk_state *walk_state;

	ACPI_FUNCTION_TRACE(ps_execute_method);

	/* Quick validation of DSDT header */

	acpi_tb_check_dsdt_header();

	/* Validate the Info and method Node */

	if (!info || !info->node) {
		return_ACPI_STATUS(AE_NULL_ENTRY);
	}

	/* Init for new method, wait on concurrency semaphore */

	status =
	    acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * The caller "owns" the parameters, so give each one an extra reference
	 */
	acpi_ps_update_parameter_list(info, REF_INCREMENT);

	/* Begin tracing if requested */

	acpi_ps_start_trace(info);

	/*
	 * Execute the method. Performs parse simultaneously
	 */
	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
			  "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
			  info->node->name.ascii, info->node, info->obj_desc));

	/* Create and init a Root Node */

	op = acpi_ps_create_scope_op();
	if (!op) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Create and initialize a new walk state */

	info->pass_number = ACPI_IMODE_EXECUTE;
	walk_state =
	    acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
				      NULL, NULL);
	if (!walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	status = acpi_ds_init_aml_walk(walk_state, op, info->node,
				       info->obj_desc->method.aml_start,
				       info->obj_desc->method.aml_length, info,
				       info->pass_number);
	if (ACPI_FAILURE(status)) {
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup;
	}

	if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
		walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
	}

	/* Invoke an internal method if necessary */

	if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
		status =
		    info->obj_desc->method.dispatch.implementation(walk_state);
		info->return_object = walk_state->return_desc;

		/* Cleanup states */

		acpi_ds_scope_stack_clear(walk_state);
		acpi_ps_cleanup_scope(&walk_state->parser_state);
		acpi_ds_terminate_control_method(walk_state->method_desc,
						 walk_state);
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup;
	}

	/*
	 * Start method evaluation with an implicit return of zero.
	 * This is done for Windows compatibility.
	 */
	if (acpi_gbl_enable_interpreter_slack) {
		walk_state->implicit_return_obj =
		    acpi_ut_create_integer_object((u64) 0);
		if (!walk_state->implicit_return_obj) {
			status = AE_NO_MEMORY;
			acpi_ds_delete_walk_state(walk_state);
			goto cleanup;
		}
	}

	/* Parse the AML */

	status = acpi_ps_parse_aml(walk_state);

	/* walk_state was deleted by parse_aml */

      cleanup:
	acpi_ps_delete_parse_tree(op);

	/* End optional tracing */

	acpi_ps_stop_trace(info);

	/* Take away the extra reference that we gave the parameters above */

	acpi_ps_update_parameter_list(info, REF_DECREMENT);

	/* Exit now if error above */

	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * If the method has returned an object, signal this to the caller with
	 * a control exception code
	 */
	if (info->return_object) {
		ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
				  info->return_object));
		ACPI_DUMP_STACK_ENTRY(info->return_object);

		status = AE_CTRL_RETURN_VALUE;
	}

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ps_update_parameter_list
 *
 * PARAMETERS:  info            - See struct acpi_evaluate_info
 *                                (Used: parameter_type and Parameters)
 *              action          - Add or Remove reference
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Update reference count on all method parameter objects
 *
 ******************************************************************************/

static void
acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
{
	u32 i;

	if (info->parameters) {

		/* Update reference count for each parameter */

		for (i = 0; info->parameters[i]; i++) {

			/* Ignore errors, just do them all */

			(void)acpi_ut_update_object_reference(info->
							      parameters[i],
							      action);
		}
	}
}
Commit	Line	Data
1da177e4 LT	1	/******************************************************************************
	2	*
	3	* Module Name: psxface - Parser external interfaces
	4	*
	5	*****************************************************************************/
	6
	7	/*
25f044e6	8	* Copyright (C) 2000 - 2013, 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
1da177e4	44	#include <acpi/acpi.h>
e2f7a777 LB	45	#include "accommon.h"
	46	#include "acparser.h"
	47	#include "acdispat.h"
	48	#include "acinterp.h"
69ec87ef	49	#include "actables.h"
1da177e4	50
1da177e4	51	#define _COMPONENT ACPI_PARSER
4be44fcd	52	ACPI_MODULE_NAME("psxface")
1da177e4	53
0c9938cc	54	/* Local Prototypes */
4119532c	55	static void acpi_ps_start_trace(struct acpi_evaluate_info *info);
50eca3eb	56
4119532c	57	static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);
50eca3eb	58
0c9938cc	59	static void
4119532c	60	acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
1da177e4	61
50eca3eb BM	62	/*******************************************************************************
	63	*
	64	* FUNCTION: acpi_debug_trace
	65	*
	66	* PARAMETERS: method_name - Valid ACPI name string
	67	* debug_level - Optional level mask. 0 to use default
	68	* debug_layer - Optional layer mask. 0 to use default
ba494bee	69	* flags - bit 1: one shot(1) or persistent(0)
50eca3eb BM	70	*
	71	* RETURN: Status
	72	*
	73	* DESCRIPTION: External interface to enable debug tracing during control
	74	* method execution
	75	*
	76	******************************************************************************/
	77
	78	acpi_status
	79	acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
	80	{
	81	acpi_status status;
	82
	83	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	84	if (ACPI_FAILURE(status)) {
	85	return (status);
	86	}
	87
	88	/* TBDs: Validate name, allow full path or just nameseg */
	89
c51a4de8	90	acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
50eca3eb BM	91	acpi_gbl_trace_flags = flags;
	92
	93	if (debug_level) {
	94	acpi_gbl_trace_dbg_level = debug_level;
	95	}
	96	if (debug_layer) {
	97	acpi_gbl_trace_dbg_layer = debug_layer;
	98	}
	99
	100	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	101	return (AE_OK);
	102	}
	103
	104	/*******************************************************************************
	105	*
	106	* FUNCTION: acpi_ps_start_trace
	107	*
ba494bee	108	* PARAMETERS: info - Method info struct
50eca3eb BM	109	*
	110	* RETURN: None
	111	*
	112	* DESCRIPTION: Start control method execution trace
	113	*
	114	******************************************************************************/
	115
4119532c	116	static void acpi_ps_start_trace(struct acpi_evaluate_info *info)
50eca3eb BM	117	{
	118	acpi_status status;
	119
	120	ACPI_FUNCTION_ENTRY();
	121
	122	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	123	if (ACPI_FAILURE(status)) {
	124	return;
	125	}
	126
	127	if ((!acpi_gbl_trace_method_name) \|\|
29a241cc	128	(acpi_gbl_trace_method_name != info->node->name.integer)) {
50eca3eb BM	129	goto exit;
	130	}
	131
	132	acpi_gbl_original_dbg_level = acpi_dbg_level;
	133	acpi_gbl_original_dbg_layer = acpi_dbg_layer;
	134
	135	acpi_dbg_level = 0x00FFFFFF;
	136	acpi_dbg_layer = ACPI_UINT32_MAX;
	137
	138	if (acpi_gbl_trace_dbg_level) {
	139	acpi_dbg_level = acpi_gbl_trace_dbg_level;
	140	}
	141	if (acpi_gbl_trace_dbg_layer) {
	142	acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
	143	}
	144
	145	exit:
	146	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	147	}
	148
	149	/*******************************************************************************
	150	*
	151	* FUNCTION: acpi_ps_stop_trace
	152	*
ba494bee	153	* PARAMETERS: info - Method info struct
50eca3eb BM	154	*
	155	* RETURN: None
	156	*
	157	* DESCRIPTION: Stop control method execution trace
	158	*
	159	******************************************************************************/
	160
4119532c	161	static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)
50eca3eb BM	162	{
	163	acpi_status status;
	164
	165	ACPI_FUNCTION_ENTRY();
	166
	167	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	168	if (ACPI_FAILURE(status)) {
	169	return;
	170	}
	171
	172	if ((!acpi_gbl_trace_method_name) \|\|
29a241cc	173	(acpi_gbl_trace_method_name != info->node->name.integer)) {
50eca3eb BM	174	goto exit;
	175	}
	176
	177	/* Disable further tracing if type is one-shot */
	178
	179	if (acpi_gbl_trace_flags & 1) {
	180	acpi_gbl_trace_method_name = 0;
	181	acpi_gbl_trace_dbg_level = 0;
	182	acpi_gbl_trace_dbg_layer = 0;
	183	}
	184
	185	acpi_dbg_level = acpi_gbl_original_dbg_level;
	186	acpi_dbg_layer = acpi_gbl_original_dbg_layer;
	187
	188	exit:
	189	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	190	}
	191
1da177e4 LT	192	/*******************************************************************************
1da177e4 LT	193	*
0c9938cc	194	* FUNCTION: acpi_ps_execute_method
1da177e4	195	*
ba494bee BM	196	* PARAMETERS: info - Method info block, contains:
ba494bee BM	197	* node - Method Node to execute
0c9938cc	198	* obj_desc - Method object
ba494bee	199	* parameters - List of parameters to pass to the method,
1da177e4 LT	200	* terminated by NULL. Params itself may be
1da177e4 LT	201	* NULL if no parameters are being passed.
44f6c012 RM	202	* return_object - Where to put method's return value (if
	203	* any). If NULL, no value is returned.
	204	* parameter_type - Type of Parameter list
	205	* return_object - Where to put method's return value (if
	206	* any). If NULL, no value is returned.
0c9938cc	207	* pass_number - Parse or execute pass
1da177e4 LT	208	*
	209	* RETURN: Status
	210	*
	211	* DESCRIPTION: Execute a control method
	212	*
	213	******************************************************************************/
	214
4119532c	215	acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
1da177e4	216	{
4be44fcd	217	acpi_status status;
9bc75cff VP	218	union acpi_parse_object *op;
9bc75cff VP	219	struct acpi_walk_state *walk_state;
1da177e4	220
b229cf92	221	ACPI_FUNCTION_TRACE(ps_execute_method);
1da177e4	222
729df0f8 LM	223	/* Quick validation of DSDT header */
	224
	225	acpi_tb_check_dsdt_header();
	226
0c9938cc	227	/* Validate the Info and method Node */
1da177e4	228
29a241cc	229	if (!info \|\| !info->node) {
4be44fcd	230	return_ACPI_STATUS(AE_NULL_ENTRY);
1da177e4 LT	231	}
1da177e4 LT	232
1da177e4 LT	233	/* Init for new method, wait on concurrency semaphore */
1da177e4 LT	234
4be44fcd	235	status =
29a241cc	236	acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL);
4be44fcd LB	237	if (ACPI_FAILURE(status)) {
4be44fcd LB	238	return_ACPI_STATUS(status);
1da177e4 LT	239	}
1da177e4 LT	240
0c9938cc	241	/*
9bc75cff	242	* The caller "owns" the parameters, so give each one an extra reference
0c9938cc	243	*/
4be44fcd	244	acpi_ps_update_parameter_list(info, REF_INCREMENT);
1da177e4	245
50eca3eb BM	246	/* Begin tracing if requested */
	247
	248	acpi_ps_start_trace(info);
	249
0c9938cc	250	/*
9bc75cff	251	* Execute the method. Performs parse simultaneously
0c9938cc	252	*/
4be44fcd	253	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
9bc75cff	254	"** Begin Method Parse/Execute [%4.4s] ** Node=%p Obj=%p\n",
29a241cc	255	info->node->name.ascii, info->node, info->obj_desc));
1da177e4	256
9bc75cff VP	257	/* Create and init a Root Node */
	258
	259	op = acpi_ps_create_scope_op();
	260	if (!op) {
	261	status = AE_NO_MEMORY;
0c9938cc	262	goto cleanup;
1da177e4 LT	263	}
1da177e4 LT	264
9bc75cff	265	/* Create and initialize a new walk state */
1da177e4	266
ec3153fb	267	info->pass_number = ACPI_IMODE_EXECUTE;
9bc75cff VP	268	walk_state =
	269	acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
	270	NULL, NULL);
	271	if (!walk_state) {
	272	status = AE_NO_MEMORY;
	273	goto cleanup;
	274	}
	275
29a241cc	276	status = acpi_ds_init_aml_walk(walk_state, op, info->node,
9bc75cff VP	277	info->obj_desc->method.aml_start,
	278	info->obj_desc->method.aml_length, info,
	279	info->pass_number);
	280	if (ACPI_FAILURE(status)) {
	281	acpi_ds_delete_walk_state(walk_state);
	282	goto cleanup;
	283	}
	284
26294842	285	if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
7f0c826a LM	286	walk_state->parse_flags \|= ACPI_PARSE_MODULE_LEVEL;
	287	}
	288
a8fadc92 BM	289	/* Invoke an internal method if necessary */
a8fadc92 BM	290
26294842	291	if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
e31c32cf	292	status =
26294842	293	info->obj_desc->method.dispatch.implementation(walk_state);
a8fadc92 BM	294	info->return_object = walk_state->return_desc;
	295
	296	/* Cleanup states */
	297
	298	acpi_ds_scope_stack_clear(walk_state);
	299	acpi_ps_cleanup_scope(&walk_state->parser_state);
	300	acpi_ds_terminate_control_method(walk_state->method_desc,
	301	walk_state);
	302	acpi_ds_delete_walk_state(walk_state);
	303	goto cleanup;
	304	}
	305
7a4b8131 LM	306	/*
	307	* Start method evaluation with an implicit return of zero.
	308	* This is done for Windows compatibility.
	309	*/
	310	if (acpi_gbl_enable_interpreter_slack) {
	311	walk_state->implicit_return_obj =
dc95a270	312	acpi_ut_create_integer_object((u64) 0);
7a4b8131 LM	313	if (!walk_state->implicit_return_obj) {
	314	status = AE_NO_MEMORY;
	315	acpi_ds_delete_walk_state(walk_state);
	316	goto cleanup;
	317	}
7a4b8131 LM	318	}
7a4b8131 LM	319
9bc75cff VP	320	/* Parse the AML */
	321
	322	status = acpi_ps_parse_aml(walk_state);
	323
	324	/* walk_state was deleted by parse_aml */
0c9938cc	325
4be44fcd	326	cleanup:
9bc75cff VP	327	acpi_ps_delete_parse_tree(op);
9bc75cff VP	328
50eca3eb BM	329	/* End optional tracing */
	330
	331	acpi_ps_stop_trace(info);
	332
0c9938cc	333	/* Take away the extra reference that we gave the parameters above */
1da177e4	334
4be44fcd	335	acpi_ps_update_parameter_list(info, REF_DECREMENT);
1da177e4	336
0c9938cc	337	/* Exit now if error above */
1da177e4	338
4be44fcd LB	339	if (ACPI_FAILURE(status)) {
4be44fcd LB	340	return_ACPI_STATUS(status);
1da177e4 LT	341	}
1da177e4 LT	342
0c9938cc RM	343	/*
	344	* If the method has returned an object, signal this to the caller with
	345	* a control exception code
	346	*/
	347	if (info->return_object) {
b229cf92	348	ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
4be44fcd LB	349	info->return_object));
4be44fcd LB	350	ACPI_DUMP_STACK_ENTRY(info->return_object);
0c9938cc RM	351
0c9938cc RM	352	status = AE_CTRL_RETURN_VALUE;
1da177e4 LT	353	}
1da177e4 LT	354
4be44fcd	355	return_ACPI_STATUS(status);
0c9938cc	356	}
44f6c012	357
0c9938cc RM	358	/*******************************************************************************
	359	*
	360	* FUNCTION: acpi_ps_update_parameter_list
	361	*
ba494bee	362	* PARAMETERS: info - See struct acpi_evaluate_info
0c9938cc	363	* (Used: parameter_type and Parameters)
ba494bee	364	* action - Add or Remove reference
0c9938cc RM	365	*
	366	* RETURN: Status
	367	*
	368	* DESCRIPTION: Update reference count on all method parameter objects
	369	*
	370	******************************************************************************/
1da177e4	371
0c9938cc	372	static void
4119532c	373	acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
0c9938cc	374	{
67a119f9	375	u32 i;
1da177e4	376
c91d924e	377	if (info->parameters) {
52fc0b02	378
0c9938cc	379	/* Update reference count for each parameter */
1da177e4 LT	380
1da177e4 LT	381	for (i = 0; info->parameters[i]; i++) {
52fc0b02	382
1da177e4 LT	383	/* Ignore errors, just do them all */
1da177e4 LT	384
4be44fcd LB	385	(void)acpi_ut_update_object_reference(info->
	386	parameters[i],
	387	action);
1da177e4 LT	388	}
1da177e4 LT	389	}
0c9938cc	390	}