Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: dswscope - Scope stack manipulation |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2005, R. Byron Moore |
| 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 | |
| 44 | |
| 45 | #include <acpi/acpi.h> |
| 46 | #include <acpi/acdispat.h> |
| 47 | |
| 48 | |
| 49 | #define _COMPONENT ACPI_DISPATCHER |
| 50 | ACPI_MODULE_NAME ("dswscope") |
| 51 | |
| 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /**************************************************************************** |
| 54 | * |
| 55 | * FUNCTION: acpi_ds_scope_stack_clear |
| 56 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 57 | * PARAMETERS: walk_state - Current state |
| 58 | * |
| 59 | * RETURN: None |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | * |
| 61 | * DESCRIPTION: Pop (and free) everything on the scope stack except the |
| 62 | * root scope object (which remains at the stack top.) |
| 63 | * |
| 64 | ***************************************************************************/ |
| 65 | |
| 66 | void |
| 67 | acpi_ds_scope_stack_clear ( |
| 68 | struct acpi_walk_state *walk_state) |
| 69 | { |
| 70 | union acpi_generic_state *scope_info; |
| 71 | |
| 72 | ACPI_FUNCTION_NAME ("ds_scope_stack_clear"); |
| 73 | |
| 74 | |
| 75 | while (walk_state->scope_info) { |
| 76 | /* Pop a scope off the stack */ |
| 77 | |
| 78 | scope_info = walk_state->scope_info; |
| 79 | walk_state->scope_info = scope_info->scope.next; |
| 80 | |
| 81 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 82 | "Popped object type (%s)\n", |
| 83 | acpi_ut_get_type_name (scope_info->common.value))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | acpi_ut_delete_generic_state (scope_info); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | |
| 89 | /**************************************************************************** |
| 90 | * |
| 91 | * FUNCTION: acpi_ds_scope_stack_push |
| 92 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 93 | * PARAMETERS: Node - Name to be made current |
| 94 | * Type - Type of frame being pushed |
| 95 | * walk_state - Current state |
| 96 | * |
| 97 | * RETURN: Status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | * |
| 99 | * DESCRIPTION: Push the current scope on the scope stack, and make the |
| 100 | * passed Node current. |
| 101 | * |
| 102 | ***************************************************************************/ |
| 103 | |
| 104 | acpi_status |
| 105 | acpi_ds_scope_stack_push ( |
| 106 | struct acpi_namespace_node *node, |
| 107 | acpi_object_type type, |
| 108 | struct acpi_walk_state *walk_state) |
| 109 | { |
| 110 | union acpi_generic_state *scope_info; |
| 111 | union acpi_generic_state *old_scope_info; |
| 112 | |
| 113 | |
| 114 | ACPI_FUNCTION_TRACE ("ds_scope_stack_push"); |
| 115 | |
| 116 | |
| 117 | if (!node) { |
| 118 | /* Invalid scope */ |
| 119 | |
| 120 | ACPI_REPORT_ERROR (("ds_scope_stack_push: null scope passed\n")); |
| 121 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 122 | } |
| 123 | |
| 124 | /* Make sure object type is valid */ |
| 125 | |
| 126 | if (!acpi_ut_valid_object_type (type)) { |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 127 | ACPI_REPORT_WARNING (( |
| 128 | "ds_scope_stack_push: Invalid object type: 0x%X\n", type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | /* Allocate a new scope object */ |
| 132 | |
| 133 | scope_info = acpi_ut_create_generic_state (); |
| 134 | if (!scope_info) { |
| 135 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 136 | } |
| 137 | |
| 138 | /* Init new scope object */ |
| 139 | |
| 140 | scope_info->common.data_type = ACPI_DESC_TYPE_STATE_WSCOPE; |
| 141 | scope_info->scope.node = node; |
| 142 | scope_info->common.value = (u16) type; |
| 143 | |
| 144 | walk_state->scope_depth++; |
| 145 | |
| 146 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 147 | "[%.2d] Pushed scope ", (u32) walk_state->scope_depth)); |
| 148 | |
| 149 | old_scope_info = walk_state->scope_info; |
| 150 | if (old_scope_info) { |
| 151 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, |
| 152 | "[%4.4s] (%s)", |
| 153 | acpi_ut_get_node_name (old_scope_info->scope.node), |
| 154 | acpi_ut_get_type_name (old_scope_info->common.value))); |
| 155 | } |
| 156 | else { |
| 157 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, |
| 158 | "[\\___] (%s)", "ROOT")); |
| 159 | } |
| 160 | |
| 161 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, |
| 162 | ", New scope -> [%4.4s] (%s)\n", |
| 163 | acpi_ut_get_node_name (scope_info->scope.node), |
| 164 | acpi_ut_get_type_name (scope_info->common.value))); |
| 165 | |
| 166 | /* Push new scope object onto stack */ |
| 167 | |
| 168 | acpi_ut_push_generic_state (&walk_state->scope_info, scope_info); |
| 169 | return_ACPI_STATUS (AE_OK); |
| 170 | } |
| 171 | |
| 172 | |
| 173 | /**************************************************************************** |
| 174 | * |
| 175 | * FUNCTION: acpi_ds_scope_stack_pop |
| 176 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 177 | * PARAMETERS: walk_state - Current state |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 179 | * RETURN: Status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 181 | * DESCRIPTION: Pop the scope stack once. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | * |
| 183 | ***************************************************************************/ |
| 184 | |
| 185 | acpi_status |
| 186 | acpi_ds_scope_stack_pop ( |
| 187 | struct acpi_walk_state *walk_state) |
| 188 | { |
| 189 | union acpi_generic_state *scope_info; |
| 190 | union acpi_generic_state *new_scope_info; |
| 191 | |
| 192 | |
| 193 | ACPI_FUNCTION_TRACE ("ds_scope_stack_pop"); |
| 194 | |
| 195 | |
| 196 | /* |
| 197 | * Pop scope info object off the stack. |
| 198 | */ |
| 199 | scope_info = acpi_ut_pop_generic_state (&walk_state->scope_info); |
| 200 | if (!scope_info) { |
| 201 | return_ACPI_STATUS (AE_STACK_UNDERFLOW); |
| 202 | } |
| 203 | |
| 204 | walk_state->scope_depth--; |
| 205 | |
| 206 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 207 | "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", |
| 208 | (u32) walk_state->scope_depth, |
| 209 | acpi_ut_get_node_name (scope_info->scope.node), |
| 210 | acpi_ut_get_type_name (scope_info->common.value))); |
| 211 | |
| 212 | new_scope_info = walk_state->scope_info; |
| 213 | if (new_scope_info) { |
| 214 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, |
| 215 | "[%4.4s] (%s)\n", |
| 216 | acpi_ut_get_node_name (new_scope_info->scope.node), |
| 217 | acpi_ut_get_type_name (new_scope_info->common.value))); |
| 218 | } |
| 219 | else { |
| 220 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, |
| 221 | "[\\___] (ROOT)\n")); |
| 222 | } |
| 223 | |
| 224 | acpi_ut_delete_generic_state (scope_info); |
| 225 | return_ACPI_STATUS (AE_OK); |
| 226 | } |
| 227 | |
| 228 | |