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Viewing changes to drivers/acpi/acpica/dswscope.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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drivers/acpi/acpica/dswscope.c
 
1
/******************************************************************************
 
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 *
 
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 * Module Name: dswscope - Scope stack manipulation
 
4
 *
 
5
 *****************************************************************************/
 
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/*
 
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 * Copyright (C) 2000 - 2011, Intel Corp.
 
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,
 
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 *    without modification.
 
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 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 
18
 *    substantially similar to the "NO WARRANTY" disclaimer below
 
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 *    ("Disclaimer") and any redistribution must be conditioned upon
 
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 *    including a substantially similar Disclaimer requirement for further
 
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 *    binary redistribution.
 
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 * 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
 
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 * Software Foundation.
 
29
 *
 
30
 * NO WARRANTY
 
31
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 
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 * "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
 
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 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 
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 * POSSIBILITY OF SUCH DAMAGES.
 
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 */
 
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#include <acpi/acpi.h>
 
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#include "accommon.h"
 
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#include "acdispat.h"
 
47
 
 
48
#define _COMPONENT          ACPI_DISPATCHER
 
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ACPI_MODULE_NAME("dswscope")
 
50
 
 
51
/****************************************************************************
 
52
 *
 
53
 * FUNCTION:    acpi_ds_scope_stack_clear
 
54
 *
 
55
 * PARAMETERS:  walk_state      - Current state
 
56
 *
 
57
 * RETURN:      None
 
58
 *
 
59
 * DESCRIPTION: Pop (and free) everything on the scope stack except the
 
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 *              root scope object (which remains at the stack top.)
 
61
 *
 
62
 ***************************************************************************/
 
63
void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state)
 
64
{
 
65
        union acpi_generic_state *scope_info;
 
66
 
 
67
        ACPI_FUNCTION_NAME(ds_scope_stack_clear);
 
68
 
 
69
        while (walk_state->scope_info) {
 
70
 
 
71
                /* Pop a scope off the stack */
 
72
 
 
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                scope_info = walk_state->scope_info;
 
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                walk_state->scope_info = scope_info->scope.next;
 
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                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 
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                                  "Popped object type (%s)\n",
 
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                                  acpi_ut_get_type_name(scope_info->common.
 
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                                                        value)));
 
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                acpi_ut_delete_generic_state(scope_info);
 
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        }
 
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}
 
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84
/****************************************************************************
 
85
 *
 
86
 * FUNCTION:    acpi_ds_scope_stack_push
 
87
 *
 
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 * PARAMETERS:  Node            - Name to be made current
 
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 *              Type            - Type of frame being pushed
 
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 *              walk_state      - Current state
 
91
 *
 
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 * RETURN:      Status
 
93
 *
 
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 * DESCRIPTION: Push the current scope on the scope stack, and make the
 
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 *              passed Node current.
 
96
 *
 
97
 ***************************************************************************/
 
98
 
 
99
acpi_status
 
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acpi_ds_scope_stack_push(struct acpi_namespace_node *node,
 
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                         acpi_object_type type,
 
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                         struct acpi_walk_state *walk_state)
 
103
{
 
104
        union acpi_generic_state *scope_info;
 
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        union acpi_generic_state *old_scope_info;
 
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107
        ACPI_FUNCTION_TRACE(ds_scope_stack_push);
 
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109
        if (!node) {
 
110
 
 
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                /* Invalid scope   */
 
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                ACPI_ERROR((AE_INFO, "Null scope parameter"));
 
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                return_ACPI_STATUS(AE_BAD_PARAMETER);
 
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        }
 
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117
        /* Make sure object type is valid */
 
118
 
 
119
        if (!acpi_ut_valid_object_type(type)) {
 
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                ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type));
 
121
        }
 
122
 
 
123
        /* Allocate a new scope object */
 
124
 
 
125
        scope_info = acpi_ut_create_generic_state();
 
126
        if (!scope_info) {
 
127
                return_ACPI_STATUS(AE_NO_MEMORY);
 
128
        }
 
129
 
 
130
        /* Init new scope object */
 
131
 
 
132
        scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE;
 
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        scope_info->scope.node = node;
 
134
        scope_info->common.value = (u16) type;
 
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        walk_state->scope_depth++;
 
137
 
 
138
        ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 
139
                          "[%.2d] Pushed scope ",
 
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                          (u32) walk_state->scope_depth));
 
141
 
 
142
        old_scope_info = walk_state->scope_info;
 
143
        if (old_scope_info) {
 
144
                ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
 
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                                      "[%4.4s] (%s)",
 
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                                      acpi_ut_get_node_name(old_scope_info->
 
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                                                            scope.node),
 
148
                                      acpi_ut_get_type_name(old_scope_info->
 
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                                                            common.value)));
 
150
        } else {
 
151
                ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (%s)", "ROOT"));
 
152
        }
 
153
 
 
154
        ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
 
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                              ", New scope -> [%4.4s] (%s)\n",
 
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                              acpi_ut_get_node_name(scope_info->scope.node),
 
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                              acpi_ut_get_type_name(scope_info->common.value)));
 
158
 
 
159
        /* Push new scope object onto stack */
 
160
 
 
161
        acpi_ut_push_generic_state(&walk_state->scope_info, scope_info);
 
162
        return_ACPI_STATUS(AE_OK);
 
163
}
 
164
 
 
165
/****************************************************************************
 
166
 *
 
167
 * FUNCTION:    acpi_ds_scope_stack_pop
 
168
 *
 
169
 * PARAMETERS:  walk_state      - Current state
 
170
 *
 
171
 * RETURN:      Status
 
172
 *
 
173
 * DESCRIPTION: Pop the scope stack once.
 
174
 *
 
175
 ***************************************************************************/
 
176
 
 
177
acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state)
 
178
{
 
179
        union acpi_generic_state *scope_info;
 
180
        union acpi_generic_state *new_scope_info;
 
181
 
 
182
        ACPI_FUNCTION_TRACE(ds_scope_stack_pop);
 
183
 
 
184
        /*
 
185
         * Pop scope info object off the stack.
 
186
         */
 
187
        scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info);
 
188
        if (!scope_info) {
 
189
                return_ACPI_STATUS(AE_STACK_UNDERFLOW);
 
190
        }
 
191
 
 
192
        walk_state->scope_depth--;
 
193
 
 
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)));
 
199
 
 
200
        new_scope_info = walk_state->scope_info;
 
201
        if (new_scope_info) {
 
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"));
 
210
        }
 
211
 
 
212
        acpi_ut_delete_generic_state(scope_info);
 
213
        return_ACPI_STATUS(AE_OK);
 
214
}