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6595 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: dswscope - Scope stack manipulation |
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4 | * |
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5 | *****************************************************************************/ |
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6 | |||
7 | /* |
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8 | * Copyright (C) 2000 - 2015, Intel Corp. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions |
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13 | * are met: |
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14 | * 1. Redistributions of source code must retain the above copyright |
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15 | * notice, this list of conditions, and the following disclaimer, |
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16 | * without modification. |
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17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
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18 | * substantially similar to the "NO WARRANTY" disclaimer below |
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19 | * ("Disclaimer") and any redistribution must be conditioned upon |
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20 | * including a substantially similar Disclaimer requirement for further |
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21 | * binary redistribution. |
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22 | * 3. Neither the names of the above-listed copyright holders nor the names |
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23 | * of any contributors may be used to endorse or promote products derived |
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24 | * from this software without specific prior written permission. |
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25 | * |
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26 | * Alternatively, this software may be distributed under the terms of the |
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27 | * GNU General Public License ("GPL") version 2 as published by the Free |
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28 | * Software Foundation. |
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29 | * |
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30 | * NO WARRANTY |
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31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
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34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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41 | * POSSIBILITY OF SUCH DAMAGES. |
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42 | */ |
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43 | |||
44 | #include |
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45 | #include "accommon.h" |
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46 | #include "acdispat.h" |
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47 | |||
48 | #define _COMPONENT ACPI_DISPATCHER |
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49 | ACPI_MODULE_NAME("dswscope") |
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50 | |||
51 | /**************************************************************************** |
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52 | * |
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53 | * FUNCTION: acpi_ds_scope_stack_clear |
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54 | * |
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55 | * PARAMETERS: walk_state - Current state |
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56 | * |
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57 | * RETURN: None |
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58 | * |
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59 | * DESCRIPTION: Pop (and free) everything on the scope stack except the |
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60 | * root scope object (which remains at the stack top.) |
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61 | * |
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62 | ***************************************************************************/ |
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63 | void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state) |
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64 | { |
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65 | union acpi_generic_state *scope_info; |
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66 | |||
67 | ACPI_FUNCTION_NAME(ds_scope_stack_clear); |
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68 | |||
69 | while (walk_state->scope_info) { |
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70 | |||
71 | /* Pop a scope off the stack */ |
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72 | |||
73 | scope_info = walk_state->scope_info; |
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74 | walk_state->scope_info = scope_info->scope.next; |
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75 | |||
76 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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77 | "Popped object type (%s)\n", |
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78 | acpi_ut_get_type_name(scope_info->common. |
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79 | value))); |
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80 | acpi_ut_delete_generic_state(scope_info); |
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81 | } |
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82 | } |
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83 | |||
84 | /**************************************************************************** |
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85 | * |
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86 | * FUNCTION: acpi_ds_scope_stack_push |
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87 | * |
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88 | * PARAMETERS: node - Name to be made current |
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89 | * type - Type of frame being pushed |
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90 | * walk_state - Current state |
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91 | * |
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92 | * RETURN: Status |
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93 | * |
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94 | * DESCRIPTION: Push the current scope on the scope stack, and make the |
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95 | * passed Node current. |
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96 | * |
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97 | ***************************************************************************/ |
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98 | |||
99 | acpi_status |
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100 | acpi_ds_scope_stack_push(struct acpi_namespace_node *node, |
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101 | acpi_object_type type, |
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102 | struct acpi_walk_state *walk_state) |
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103 | { |
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104 | union acpi_generic_state *scope_info; |
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105 | union acpi_generic_state *old_scope_info; |
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106 | |||
107 | ACPI_FUNCTION_TRACE(ds_scope_stack_push); |
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108 | |||
109 | if (!node) { |
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110 | |||
111 | /* Invalid scope */ |
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112 | |||
113 | ACPI_ERROR((AE_INFO, "Null scope parameter")); |
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114 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
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115 | } |
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116 | |||
117 | /* Make sure object type is valid */ |
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118 | |||
119 | if (!acpi_ut_valid_object_type(type)) { |
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120 | ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type)); |
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121 | } |
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122 | |||
123 | /* Allocate a new scope object */ |
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124 | |||
125 | scope_info = acpi_ut_create_generic_state(); |
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126 | if (!scope_info) { |
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127 | return_ACPI_STATUS(AE_NO_MEMORY); |
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128 | } |
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129 | |||
130 | /* Init new scope object */ |
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131 | |||
132 | scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE; |
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133 | scope_info->scope.node = node; |
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134 | scope_info->common.value = (u16) type; |
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135 | |||
136 | walk_state->scope_depth++; |
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137 | |||
138 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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139 | "[%.2d] Pushed scope ", |
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140 | (u32) walk_state->scope_depth)); |
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141 | |||
142 | old_scope_info = walk_state->scope_info; |
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143 | if (old_scope_info) { |
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144 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
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145 | "[%4.4s] (%s)", |
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146 | acpi_ut_get_node_name(old_scope_info-> |
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147 | scope.node), |
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148 | acpi_ut_get_type_name(old_scope_info-> |
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149 | common.value))); |
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150 | } else { |
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151 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (%s)", "ROOT")); |
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152 | } |
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153 | |||
154 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
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155 | ", New scope -> [%4.4s] (%s)\n", |
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156 | acpi_ut_get_node_name(scope_info->scope.node), |
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157 | acpi_ut_get_type_name(scope_info->common.value))); |
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158 | |||
159 | /* Push new scope object onto stack */ |
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160 | |||
161 | acpi_ut_push_generic_state(&walk_state->scope_info, scope_info); |
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162 | return_ACPI_STATUS(AE_OK); |
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163 | } |
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164 | |||
165 | /**************************************************************************** |
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166 | * |
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167 | * FUNCTION: acpi_ds_scope_stack_pop |
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168 | * |
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169 | * PARAMETERS: walk_state - Current state |
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170 | * |
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171 | * RETURN: Status |
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172 | * |
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173 | * DESCRIPTION: Pop the scope stack once. |
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174 | * |
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175 | ***************************************************************************/ |
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176 | |||
177 | acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state) |
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178 | { |
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179 | union acpi_generic_state *scope_info; |
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180 | union acpi_generic_state *new_scope_info; |
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181 | |||
182 | ACPI_FUNCTION_TRACE(ds_scope_stack_pop); |
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183 | |||
184 | /* |
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185 | * Pop scope info object off the stack. |
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186 | */ |
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187 | scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info); |
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188 | if (!scope_info) { |
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189 | return_ACPI_STATUS(AE_STACK_UNDERFLOW); |
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190 | } |
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191 | |||
192 | walk_state->scope_depth--; |
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193 | |||
194 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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195 | "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", |
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196 | (u32) walk_state->scope_depth, |
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197 | acpi_ut_get_node_name(scope_info->scope.node), |
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198 | acpi_ut_get_type_name(scope_info->common.value))); |
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199 | |||
200 | new_scope_info = walk_state->scope_info; |
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201 | if (new_scope_info) { |
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202 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
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203 | "[%4.4s] (%s)\n", |
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204 | acpi_ut_get_node_name(new_scope_info-> |
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205 | scope.node), |
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206 | acpi_ut_get_type_name(new_scope_info-> |
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207 | common.value))); |
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208 | } else { |
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209 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (ROOT)\n")); |
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210 | } |
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211 | |||
212 | acpi_ut_delete_generic_state(scope_info); |
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213 | return_ACPI_STATUS(AE_OK); |
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214 | } |