[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / acpica / dswscope.c

/******************************************************************************
 *
 * Module Name: dswscope - Scope stack manipulation
 *
 *****************************************************************************/

/*
 * 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 "acdispat.h"

#define _COMPONENT          ACPI_DISPATCHER
ACPI_MODULE_NAME("dswscope")

/****************************************************************************
 *
 * FUNCTION:    acpi_ds_scope_stack_clear
 *
 * PARAMETERS:  walk_state      - Current state
 *
 * RETURN:      None
 *
 * DESCRIPTION: Pop (and free) everything on the scope stack except the
 *              root scope object (which remains at the stack top.)
 *
 ***************************************************************************/
void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state)
{
	union acpi_generic_state *scope_info;

	ACPI_FUNCTION_NAME(ds_scope_stack_clear);

	while (walk_state->scope_info) {

		/* Pop a scope off the stack */

		scope_info = walk_state->scope_info;
		walk_state->scope_info = scope_info->scope.next;

		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
				  "Popped object type (%s)\n",
				  acpi_ut_get_type_name(scope_info->common.
							value)));
		acpi_ut_delete_generic_state(scope_info);
	}
}

/****************************************************************************
 *
 * FUNCTION:    acpi_ds_scope_stack_push
 *
 * PARAMETERS:  node            - Name to be made current
 *              type            - Type of frame being pushed
 *              walk_state      - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Push the current scope on the scope stack, and make the
 *              passed Node current.
 *
 ***************************************************************************/

acpi_status
acpi_ds_scope_stack_push(struct acpi_namespace_node *node,
			 acpi_object_type type,
			 struct acpi_walk_state *walk_state)
{
	union acpi_generic_state *scope_info;
	union acpi_generic_state *old_scope_info;

	ACPI_FUNCTION_TRACE(ds_scope_stack_push);

	if (!node) {

		/* Invalid scope   */

		ACPI_ERROR((AE_INFO, "Null scope parameter"));
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	/* Make sure object type is valid */

	if (!acpi_ut_valid_object_type(type)) {
		ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type));
	}

	/* Allocate a new scope object */

	scope_info = acpi_ut_create_generic_state();
	if (!scope_info) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* Init new scope object */

	scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE;
	scope_info->scope.node = node;
	scope_info->common.value = (u16) type;

	walk_state->scope_depth++;

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
			  "[%.2d] Pushed scope ",
			  (u32) walk_state->scope_depth));

	old_scope_info = walk_state->scope_info;
	if (old_scope_info) {
		ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
				      "[%4.4s] (%s)",
				      acpi_ut_get_node_name(old_scope_info->
							    scope.node),
				      acpi_ut_get_type_name(old_scope_info->
							    common.value)));
	} else {
		ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (%s)", "ROOT"));
	}

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
			      ", New scope -> [%4.4s] (%s)\n",
			      acpi_ut_get_node_name(scope_info->scope.node),
			      acpi_ut_get_type_name(scope_info->common.value)));

	/* Push new scope object onto stack */

	acpi_ut_push_generic_state(&walk_state->scope_info, scope_info);
	return_ACPI_STATUS(AE_OK);
}

/****************************************************************************
 *
 * FUNCTION:    acpi_ds_scope_stack_pop
 *
 * PARAMETERS:  walk_state      - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Pop the scope stack once.
 *
 ***************************************************************************/

acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state)
{
	union acpi_generic_state *scope_info;
	union acpi_generic_state *new_scope_info;

	ACPI_FUNCTION_TRACE(ds_scope_stack_pop);

	/*
	 * Pop scope info object off the stack.
	 */
	scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info);
	if (!scope_info) {
		return_ACPI_STATUS(AE_STACK_UNDERFLOW);
	}

	walk_state->scope_depth--;

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
			  "[%.2d] Popped scope [%4.4s] (%s), New scope -> ",
			  (u32) walk_state->scope_depth,
			  acpi_ut_get_node_name(scope_info->scope.node),
			  acpi_ut_get_type_name(scope_info->common.value)));

	new_scope_info = walk_state->scope_info;
	if (new_scope_info) {
		ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
				      "[%4.4s] (%s)\n",
				      acpi_ut_get_node_name(new_scope_info->
							    scope.node),
				      acpi_ut_get_type_name(new_scope_info->
							    common.value)));
	} else {
		ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (ROOT)\n"));
	}

	acpi_ut_delete_generic_state(scope_info);
	return_ACPI_STATUS(AE_OK);
}
Commit	Line	Data
1da177e4 LT	1	/******************************************************************************
	2	*
	3	* Module Name: dswscope - Scope stack manipulation
	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"
e2f7a777 LB	46	#include "acdispat.h"
1da177e4	47
1da177e4	48	#define _COMPONENT ACPI_DISPATCHER
4be44fcd	49	ACPI_MODULE_NAME("dswscope")
1da177e4	50
1da177e4 LT	51	/****************************************************************************
	52	*
	53	* FUNCTION: acpi_ds_scope_stack_clear
	54	*
44f6c012 RM	55	* PARAMETERS: walk_state - Current state
	56	*
	57	* RETURN: None
1da177e4 LT	58	*
	59	* DESCRIPTION: Pop (and free) everything on the scope stack except the
	60	* root scope object (which remains at the stack top.)
	61	*
	62	***************************************************************************/
4be44fcd	63	void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state)
1da177e4	64	{
4be44fcd	65	union acpi_generic_state *scope_info;
1da177e4	66
b229cf92	67	ACPI_FUNCTION_NAME(ds_scope_stack_clear);
1da177e4 LT	68
1da177e4 LT	69	while (walk_state->scope_info) {
52fc0b02	70
1da177e4 LT	71	/* Pop a scope off the stack */
	72
	73	scope_info = walk_state->scope_info;
	74	walk_state->scope_info = scope_info->scope.next;
	75
4be44fcd LB	76	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
	77	"Popped object type (%s)\n",
	78	acpi_ut_get_type_name(scope_info->common.
	79	value)));
	80	acpi_ut_delete_generic_state(scope_info);
1da177e4 LT	81	}
	82	}
	83
1da177e4 LT	84	/****************************************************************************
	85	*
	86	* FUNCTION: acpi_ds_scope_stack_push
	87	*
ba494bee BM	88	* PARAMETERS: node - Name to be made current
ba494bee BM	89	* type - Type of frame being pushed
44f6c012 RM	90	* walk_state - Current state
	91	*
	92	* RETURN: Status
1da177e4 LT	93	*
	94	* DESCRIPTION: Push the current scope on the scope stack, and make the
	95	* passed Node current.
	96	*
	97	***************************************************************************/
	98
	99	acpi_status
4be44fcd LB	100	acpi_ds_scope_stack_push(struct acpi_namespace_node *node,
	101	acpi_object_type type,
	102	struct acpi_walk_state *walk_state)
1da177e4	103	{
4be44fcd LB	104	union acpi_generic_state *scope_info;
4be44fcd LB	105	union acpi_generic_state *old_scope_info;
1da177e4	106
b229cf92	107	ACPI_FUNCTION_TRACE(ds_scope_stack_push);
1da177e4 LT	108
1da177e4 LT	109	if (!node) {
52fc0b02	110
1da177e4 LT	111	/* Invalid scope */
1da177e4 LT	112
b8e4d893	113	ACPI_ERROR((AE_INFO, "Null scope parameter"));
4be44fcd	114	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	115	}
	116
	117	/* Make sure object type is valid */
	118
4be44fcd	119	if (!acpi_ut_valid_object_type(type)) {
b8e4d893	120	ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type));
1da177e4 LT	121	}
	122
	123	/* Allocate a new scope object */
	124
4be44fcd	125	scope_info = acpi_ut_create_generic_state();
1da177e4	126	if (!scope_info) {
4be44fcd	127	return_ACPI_STATUS(AE_NO_MEMORY);
1da177e4 LT	128	}
	129
	130	/* Init new scope object */
	131
61686124	132	scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE;
4be44fcd LB	133	scope_info->scope.node = node;
4be44fcd LB	134	scope_info->common.value = (u16) type;
1da177e4 LT	135
	136	walk_state->scope_depth++;
	137
4be44fcd LB	138	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
	139	"[%.2d] Pushed scope ",
	140	(u32) walk_state->scope_depth));
1da177e4 LT	141
	142	old_scope_info = walk_state->scope_info;
	143	if (old_scope_info) {
4be44fcd LB	144	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
	145	"[%4.4s] (%s)",
	146	acpi_ut_get_node_name(old_scope_info->
	147	scope.node),
	148	acpi_ut_get_type_name(old_scope_info->
	149	common.value)));
	150	} else {
	151	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (%s)", "ROOT"));
1da177e4 LT	152	}
1da177e4 LT	153
4be44fcd LB	154	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
	155	", New scope -> [%4.4s] (%s)\n",
	156	acpi_ut_get_node_name(scope_info->scope.node),
	157	acpi_ut_get_type_name(scope_info->common.value)));
1da177e4 LT	158
	159	/* Push new scope object onto stack */
	160
4be44fcd LB	161	acpi_ut_push_generic_state(&walk_state->scope_info, scope_info);
4be44fcd LB	162	return_ACPI_STATUS(AE_OK);
1da177e4 LT	163	}
1da177e4 LT	164
1da177e4 LT	165	/****************************************************************************
	166	*
	167	* FUNCTION: acpi_ds_scope_stack_pop
	168	*
44f6c012	169	* PARAMETERS: walk_state - Current state
1da177e4	170	*
44f6c012	171	* RETURN: Status
1da177e4	172	*
44f6c012	173	* DESCRIPTION: Pop the scope stack once.
1da177e4 LT	174	*
	175	***************************************************************************/
	176
4be44fcd	177	acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state)
1da177e4	178	{
4be44fcd LB	179	union acpi_generic_state *scope_info;
4be44fcd LB	180	union acpi_generic_state *new_scope_info;
1da177e4	181
b229cf92	182	ACPI_FUNCTION_TRACE(ds_scope_stack_pop);
1da177e4 LT	183
	184	/*
	185	* Pop scope info object off the stack.
	186	*/
4be44fcd	187	scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info);
1da177e4	188	if (!scope_info) {
4be44fcd	189	return_ACPI_STATUS(AE_STACK_UNDERFLOW);
1da177e4 LT	190	}
	191
	192	walk_state->scope_depth--;
	193
4be44fcd LB	194	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
	195	"[%.2d] Popped scope [%4.4s] (%s), New scope -> ",
	196	(u32) walk_state->scope_depth,
	197	acpi_ut_get_node_name(scope_info->scope.node),
	198	acpi_ut_get_type_name(scope_info->common.value)));
1da177e4 LT	199
	200	new_scope_info = walk_state->scope_info;
	201	if (new_scope_info) {
4be44fcd LB	202	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
	203	"[%4.4s] (%s)\n",
	204	acpi_ut_get_node_name(new_scope_info->
	205	scope.node),
	206	acpi_ut_get_type_name(new_scope_info->
	207	common.value)));
	208	} else {
	209	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (ROOT)\n"));
1da177e4 LT	210	}
1da177e4 LT	211
4be44fcd LB	212	acpi_ut_delete_generic_state(scope_info);
4be44fcd LB	213	return_ACPI_STATUS(AE_OK);
1da177e4	214	}