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1498 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: excreate - Named object creation |
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4 | * |
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5 | *****************************************************************************/ |
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6 | |||
7 | /****************************************************************************** |
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8 | * |
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9 | * 1. Copyright Notice |
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10 | * |
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2216 | Serge | 11 | * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp. |
1498 | serge | 12 | * All rights reserved. |
13 | * |
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14 | * 2. License |
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15 | * |
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16 | * 2.1. This is your license from Intel Corp. under its intellectual property |
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17 | * rights. You may have additional license terms from the party that provided |
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18 | * you this software, covering your right to use that party's intellectual |
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19 | * property rights. |
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20 | * |
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21 | * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a |
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22 | * copy of the source code appearing in this file ("Covered Code") an |
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23 | * irrevocable, perpetual, worldwide license under Intel's copyrights in the |
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24 | * base code distributed originally by Intel ("Original Intel Code") to copy, |
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25 | * make derivatives, distribute, use and display any portion of the Covered |
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26 | * Code in any form, with the right to sublicense such rights; and |
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27 | * |
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28 | * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent |
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29 | * license (with the right to sublicense), under only those claims of Intel |
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30 | * patents that are infringed by the Original Intel Code, to make, use, sell, |
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31 | * offer to sell, and import the Covered Code and derivative works thereof |
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32 | * solely to the minimum extent necessary to exercise the above copyright |
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33 | * license, and in no event shall the patent license extend to any additions |
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34 | * to or modifications of the Original Intel Code. No other license or right |
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35 | * is granted directly or by implication, estoppel or otherwise; |
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36 | * |
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37 | * The above copyright and patent license is granted only if the following |
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38 | * conditions are met: |
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39 | * |
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40 | * 3. Conditions |
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41 | * |
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42 | * 3.1. Redistribution of Source with Rights to Further Distribute Source. |
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43 | * Redistribution of source code of any substantial portion of the Covered |
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44 | * Code or modification with rights to further distribute source must include |
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45 | * the above Copyright Notice, the above License, this list of Conditions, |
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46 | * and the following Disclaimer and Export Compliance provision. In addition, |
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47 | * Licensee must cause all Covered Code to which Licensee contributes to |
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48 | * contain a file documenting the changes Licensee made to create that Covered |
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49 | * Code and the date of any change. Licensee must include in that file the |
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50 | * documentation of any changes made by any predecessor Licensee. Licensee |
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51 | * must include a prominent statement that the modification is derived, |
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52 | * directly or indirectly, from Original Intel Code. |
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53 | * |
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54 | * 3.2. Redistribution of Source with no Rights to Further Distribute Source. |
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55 | * Redistribution of source code of any substantial portion of the Covered |
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56 | * Code or modification without rights to further distribute source must |
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57 | * include the following Disclaimer and Export Compliance provision in the |
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58 | * documentation and/or other materials provided with distribution. In |
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59 | * addition, Licensee may not authorize further sublicense of source of any |
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60 | * portion of the Covered Code, and must include terms to the effect that the |
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61 | * license from Licensee to its licensee is limited to the intellectual |
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62 | * property embodied in the software Licensee provides to its licensee, and |
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63 | * not to intellectual property embodied in modifications its licensee may |
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64 | * make. |
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65 | * |
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66 | * 3.3. Redistribution of Executable. Redistribution in executable form of any |
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67 | * substantial portion of the Covered Code or modification must reproduce the |
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68 | * above Copyright Notice, and the following Disclaimer and Export Compliance |
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69 | * provision in the documentation and/or other materials provided with the |
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70 | * distribution. |
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71 | * |
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72 | * 3.4. Intel retains all right, title, and interest in and to the Original |
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73 | * Intel Code. |
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74 | * |
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75 | * 3.5. Neither the name Intel nor any other trademark owned or controlled by |
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76 | * Intel shall be used in advertising or otherwise to promote the sale, use or |
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77 | * other dealings in products derived from or relating to the Covered Code |
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78 | * without prior written authorization from Intel. |
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79 | * |
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80 | * 4. Disclaimer and Export Compliance |
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81 | * |
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82 | * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED |
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83 | * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE |
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84 | * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, |
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85 | * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY |
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86 | |||
87 | * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY |
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88 | * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A |
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89 | * PARTICULAR PURPOSE. |
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90 | * |
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91 | * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES |
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92 | * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR |
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93 | * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, |
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94 | * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY |
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95 | * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL |
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96 | * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS |
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97 | * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY |
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98 | * LIMITED REMEDY. |
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99 | * |
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100 | * 4.3. Licensee shall not export, either directly or indirectly, any of this |
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101 | * software or system incorporating such software without first obtaining any |
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102 | * required license or other approval from the U. S. Department of Commerce or |
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103 | * any other agency or department of the United States Government. In the |
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104 | * event Licensee exports any such software from the United States or |
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105 | * re-exports any such software from a foreign destination, Licensee shall |
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106 | * ensure that the distribution and export/re-export of the software is in |
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107 | * compliance with all laws, regulations, orders, or other restrictions of the |
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108 | * U.S. Export Administration Regulations. Licensee agrees that neither it nor |
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109 | * any of its subsidiaries will export/re-export any technical data, process, |
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110 | * software, or service, directly or indirectly, to any country for which the |
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111 | * United States government or any agency thereof requires an export license, |
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112 | * other governmental approval, or letter of assurance, without first obtaining |
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113 | * such license, approval or letter. |
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114 | * |
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115 | *****************************************************************************/ |
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116 | |||
117 | #define __EXCREATE_C__ |
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118 | |||
119 | #include "acpi.h" |
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120 | #include "accommon.h" |
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121 | #include "acinterp.h" |
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122 | #include "amlcode.h" |
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123 | #include "acnamesp.h" |
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124 | |||
125 | |||
126 | #define _COMPONENT ACPI_EXECUTER |
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127 | ACPI_MODULE_NAME ("excreate") |
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128 | |||
129 | |||
130 | #ifndef ACPI_NO_METHOD_EXECUTION |
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131 | /******************************************************************************* |
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132 | * |
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133 | * FUNCTION: AcpiExCreateAlias |
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134 | * |
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135 | * PARAMETERS: WalkState - Current state, contains operands |
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136 | * |
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137 | * RETURN: Status |
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138 | * |
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139 | * DESCRIPTION: Create a new named alias |
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140 | * |
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141 | ******************************************************************************/ |
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142 | |||
143 | ACPI_STATUS |
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144 | AcpiExCreateAlias ( |
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145 | ACPI_WALK_STATE *WalkState) |
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146 | { |
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147 | ACPI_NAMESPACE_NODE *TargetNode; |
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148 | ACPI_NAMESPACE_NODE *AliasNode; |
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149 | ACPI_STATUS Status = AE_OK; |
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150 | |||
151 | |||
152 | ACPI_FUNCTION_TRACE (ExCreateAlias); |
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153 | |||
154 | |||
155 | /* Get the source/alias operands (both namespace nodes) */ |
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156 | |||
157 | AliasNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0]; |
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158 | TargetNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[1]; |
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159 | |||
160 | if ((TargetNode->Type == ACPI_TYPE_LOCAL_ALIAS) || |
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161 | (TargetNode->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) |
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162 | { |
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163 | /* |
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164 | * Dereference an existing alias so that we don't create a chain |
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165 | * of aliases. With this code, we guarantee that an alias is |
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166 | * always exactly one level of indirection away from the |
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167 | * actual aliased name. |
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168 | */ |
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169 | TargetNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, TargetNode->Object); |
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170 | } |
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171 | |||
172 | /* |
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173 | * For objects that can never change (i.e., the NS node will |
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174 | * permanently point to the same object), we can simply attach |
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175 | * the object to the new NS node. For other objects (such as |
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176 | * Integers, buffers, etc.), we have to point the Alias node |
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177 | * to the original Node. |
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178 | */ |
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179 | switch (TargetNode->Type) |
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180 | { |
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181 | |||
182 | /* For these types, the sub-object can change dynamically via a Store */ |
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183 | |||
184 | case ACPI_TYPE_INTEGER: |
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185 | case ACPI_TYPE_STRING: |
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186 | case ACPI_TYPE_BUFFER: |
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187 | case ACPI_TYPE_PACKAGE: |
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188 | case ACPI_TYPE_BUFFER_FIELD: |
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189 | |||
190 | /* |
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191 | * These types open a new scope, so we need the NS node in order to access |
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192 | * any children. |
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193 | */ |
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194 | case ACPI_TYPE_DEVICE: |
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195 | case ACPI_TYPE_POWER: |
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196 | case ACPI_TYPE_PROCESSOR: |
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197 | case ACPI_TYPE_THERMAL: |
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198 | case ACPI_TYPE_LOCAL_SCOPE: |
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199 | |||
200 | /* |
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201 | * The new alias has the type ALIAS and points to the original |
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202 | * NS node, not the object itself. |
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203 | */ |
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204 | AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS; |
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205 | AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); |
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206 | break; |
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207 | |||
208 | case ACPI_TYPE_METHOD: |
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209 | |||
210 | /* |
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211 | * Control method aliases need to be differentiated |
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212 | */ |
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213 | AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS; |
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214 | AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); |
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215 | break; |
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216 | |||
217 | default: |
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218 | |||
219 | /* Attach the original source object to the new Alias Node */ |
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220 | |||
221 | /* |
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222 | * The new alias assumes the type of the target, and it points |
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223 | * to the same object. The reference count of the object has an |
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224 | * additional reference to prevent deletion out from under either the |
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225 | * target node or the alias Node |
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226 | */ |
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227 | Status = AcpiNsAttachObject (AliasNode, |
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228 | AcpiNsGetAttachedObject (TargetNode), TargetNode->Type); |
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229 | break; |
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230 | } |
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231 | |||
232 | /* Since both operands are Nodes, we don't need to delete them */ |
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233 | |||
234 | return_ACPI_STATUS (Status); |
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235 | } |
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236 | |||
237 | |||
238 | /******************************************************************************* |
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239 | * |
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240 | * FUNCTION: AcpiExCreateEvent |
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241 | * |
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242 | * PARAMETERS: WalkState - Current state |
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243 | * |
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244 | * RETURN: Status |
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245 | * |
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246 | * DESCRIPTION: Create a new event object |
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247 | * |
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248 | ******************************************************************************/ |
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249 | |||
250 | ACPI_STATUS |
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251 | AcpiExCreateEvent ( |
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252 | ACPI_WALK_STATE *WalkState) |
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253 | { |
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254 | ACPI_STATUS Status; |
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255 | ACPI_OPERAND_OBJECT *ObjDesc; |
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256 | |||
257 | |||
258 | ACPI_FUNCTION_TRACE (ExCreateEvent); |
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259 | |||
260 | |||
261 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT); |
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262 | if (!ObjDesc) |
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263 | { |
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264 | Status = AE_NO_MEMORY; |
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265 | goto Cleanup; |
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266 | } |
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267 | |||
268 | /* |
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269 | * Create the actual OS semaphore, with zero initial units -- meaning |
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270 | * that the event is created in an unsignalled state |
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271 | */ |
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272 | Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, |
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273 | &ObjDesc->Event.OsSemaphore); |
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274 | if (ACPI_FAILURE (Status)) |
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275 | { |
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276 | goto Cleanup; |
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277 | } |
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278 | |||
279 | /* Attach object to the Node */ |
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280 | |||
281 | Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) WalkState->Operands[0], |
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282 | ObjDesc, ACPI_TYPE_EVENT); |
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283 | |||
284 | Cleanup: |
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285 | /* |
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286 | * Remove local reference to the object (on error, will cause deletion |
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287 | * of both object and semaphore if present.) |
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288 | */ |
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289 | AcpiUtRemoveReference (ObjDesc); |
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290 | return_ACPI_STATUS (Status); |
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291 | } |
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292 | |||
293 | |||
294 | /******************************************************************************* |
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295 | * |
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296 | * FUNCTION: AcpiExCreateMutex |
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297 | * |
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298 | * PARAMETERS: WalkState - Current state |
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299 | * |
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300 | * RETURN: Status |
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301 | * |
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302 | * DESCRIPTION: Create a new mutex object |
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303 | * |
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304 | * Mutex (Name[0], SyncLevel[1]) |
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305 | * |
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306 | ******************************************************************************/ |
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307 | |||
308 | ACPI_STATUS |
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309 | AcpiExCreateMutex ( |
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310 | ACPI_WALK_STATE *WalkState) |
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311 | { |
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312 | ACPI_STATUS Status = AE_OK; |
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313 | ACPI_OPERAND_OBJECT *ObjDesc; |
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314 | |||
315 | |||
316 | ACPI_FUNCTION_TRACE_PTR (ExCreateMutex, ACPI_WALK_OPERANDS); |
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317 | |||
318 | |||
319 | /* Create the new mutex object */ |
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320 | |||
321 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX); |
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322 | if (!ObjDesc) |
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323 | { |
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324 | Status = AE_NO_MEMORY; |
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325 | goto Cleanup; |
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326 | } |
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327 | |||
328 | /* Create the actual OS Mutex */ |
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329 | |||
330 | Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex); |
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331 | if (ACPI_FAILURE (Status)) |
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332 | { |
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333 | goto Cleanup; |
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334 | } |
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335 | |||
336 | /* Init object and attach to NS node */ |
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337 | |||
338 | ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value; |
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339 | ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0]; |
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340 | |||
341 | Status = AcpiNsAttachObject (ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX); |
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342 | |||
343 | |||
344 | Cleanup: |
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345 | /* |
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346 | * Remove local reference to the object (on error, will cause deletion |
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347 | * of both object and semaphore if present.) |
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348 | */ |
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349 | AcpiUtRemoveReference (ObjDesc); |
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350 | return_ACPI_STATUS (Status); |
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351 | } |
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352 | |||
353 | |||
354 | /******************************************************************************* |
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355 | * |
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356 | * FUNCTION: AcpiExCreateRegion |
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357 | * |
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358 | * PARAMETERS: AmlStart - Pointer to the region declaration AML |
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359 | * AmlLength - Max length of the declaration AML |
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360 | * RegionSpace - SpaceID for the region |
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361 | * WalkState - Current state |
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362 | * |
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363 | * RETURN: Status |
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364 | * |
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365 | * DESCRIPTION: Create a new operation region object |
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366 | * |
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367 | ******************************************************************************/ |
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368 | |||
369 | ACPI_STATUS |
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370 | AcpiExCreateRegion ( |
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371 | UINT8 *AmlStart, |
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372 | UINT32 AmlLength, |
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373 | UINT8 RegionSpace, |
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374 | ACPI_WALK_STATE *WalkState) |
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375 | { |
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376 | ACPI_STATUS Status; |
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377 | ACPI_OPERAND_OBJECT *ObjDesc; |
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378 | ACPI_NAMESPACE_NODE *Node; |
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379 | ACPI_OPERAND_OBJECT *RegionObj2; |
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380 | |||
381 | |||
382 | ACPI_FUNCTION_TRACE (ExCreateRegion); |
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383 | |||
384 | |||
385 | /* Get the Namespace Node */ |
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386 | |||
387 | Node = WalkState->Op->Common.Node; |
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388 | |||
389 | /* |
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390 | * If the region object is already attached to this node, |
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391 | * just return |
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392 | */ |
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393 | if (AcpiNsGetAttachedObject (Node)) |
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394 | { |
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395 | return_ACPI_STATUS (AE_OK); |
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396 | } |
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397 | |||
398 | /* |
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399 | * Space ID must be one of the predefined IDs, or in the user-defined |
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400 | * range |
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401 | */ |
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402 | if ((RegionSpace >= ACPI_NUM_PREDEFINED_REGIONS) && |
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2216 | Serge | 403 | (RegionSpace < ACPI_USER_REGION_BEGIN) && |
404 | (RegionSpace != ACPI_ADR_SPACE_DATA_TABLE)) |
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1498 | serge | 405 | { |
406 | ACPI_ERROR ((AE_INFO, "Invalid AddressSpace type 0x%X", RegionSpace)); |
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407 | return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID); |
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408 | } |
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409 | |||
410 | ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n", |
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411 | AcpiUtGetRegionName (RegionSpace), RegionSpace)); |
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412 | |||
413 | /* Create the region descriptor */ |
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414 | |||
415 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); |
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416 | if (!ObjDesc) |
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417 | { |
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418 | Status = AE_NO_MEMORY; |
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419 | goto Cleanup; |
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420 | } |
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421 | |||
422 | /* |
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423 | * Remember location in AML stream of address & length |
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424 | * operands since they need to be evaluated at run time. |
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425 | */ |
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426 | RegionObj2 = ObjDesc->Common.NextObject; |
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427 | RegionObj2->Extra.AmlStart = AmlStart; |
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428 | RegionObj2->Extra.AmlLength = AmlLength; |
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429 | |||
430 | /* Init the region from the operands */ |
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431 | |||
432 | ObjDesc->Region.SpaceId = RegionSpace; |
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433 | ObjDesc->Region.Address = 0; |
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434 | ObjDesc->Region.Length = 0; |
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435 | ObjDesc->Region.Node = Node; |
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436 | |||
437 | /* Install the new region object in the parent Node */ |
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438 | |||
439 | Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION); |
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440 | |||
441 | |||
442 | Cleanup: |
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443 | |||
444 | /* Remove local reference to the object */ |
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445 | |||
446 | AcpiUtRemoveReference (ObjDesc); |
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447 | return_ACPI_STATUS (Status); |
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448 | } |
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449 | |||
450 | |||
451 | /******************************************************************************* |
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452 | * |
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453 | * FUNCTION: AcpiExCreateProcessor |
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454 | * |
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455 | * PARAMETERS: WalkState - Current state |
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456 | * |
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457 | * RETURN: Status |
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458 | * |
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459 | * DESCRIPTION: Create a new processor object and populate the fields |
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460 | * |
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461 | * Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3]) |
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462 | * |
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463 | ******************************************************************************/ |
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464 | |||
465 | ACPI_STATUS |
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466 | AcpiExCreateProcessor ( |
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467 | ACPI_WALK_STATE *WalkState) |
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468 | { |
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469 | ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; |
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470 | ACPI_OPERAND_OBJECT *ObjDesc; |
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471 | ACPI_STATUS Status; |
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472 | |||
473 | |||
474 | ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState); |
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475 | |||
476 | |||
477 | /* Create the processor object */ |
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478 | |||
479 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR); |
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480 | if (!ObjDesc) |
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481 | { |
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482 | return_ACPI_STATUS (AE_NO_MEMORY); |
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483 | } |
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484 | |||
485 | /* Initialize the processor object from the operands */ |
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486 | |||
487 | ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value; |
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488 | ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value; |
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489 | ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value; |
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490 | |||
491 | /* Install the processor object in the parent Node */ |
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492 | |||
493 | Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], |
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494 | ObjDesc, ACPI_TYPE_PROCESSOR); |
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495 | |||
496 | /* Remove local reference to the object */ |
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497 | |||
498 | AcpiUtRemoveReference (ObjDesc); |
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499 | return_ACPI_STATUS (Status); |
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500 | } |
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501 | |||
502 | |||
503 | /******************************************************************************* |
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504 | * |
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505 | * FUNCTION: AcpiExCreatePowerResource |
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506 | * |
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507 | * PARAMETERS: WalkState - Current state |
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508 | * |
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509 | * RETURN: Status |
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510 | * |
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511 | * DESCRIPTION: Create a new PowerResource object and populate the fields |
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512 | * |
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513 | * PowerResource (Name[0], SystemLevel[1], ResourceOrder[2]) |
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514 | * |
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515 | ******************************************************************************/ |
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516 | |||
517 | ACPI_STATUS |
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518 | AcpiExCreatePowerResource ( |
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519 | ACPI_WALK_STATE *WalkState) |
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520 | { |
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521 | ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; |
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522 | ACPI_STATUS Status; |
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523 | ACPI_OPERAND_OBJECT *ObjDesc; |
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524 | |||
525 | |||
526 | ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState); |
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527 | |||
528 | |||
529 | /* Create the power resource object */ |
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530 | |||
531 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER); |
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532 | if (!ObjDesc) |
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533 | { |
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534 | return_ACPI_STATUS (AE_NO_MEMORY); |
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535 | } |
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536 | |||
537 | /* Initialize the power object from the operands */ |
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538 | |||
539 | ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value; |
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540 | ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value; |
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541 | |||
542 | /* Install the power resource object in the parent Node */ |
||
543 | |||
544 | Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], |
||
545 | ObjDesc, ACPI_TYPE_POWER); |
||
546 | |||
547 | /* Remove local reference to the object */ |
||
548 | |||
549 | AcpiUtRemoveReference (ObjDesc); |
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550 | return_ACPI_STATUS (Status); |
||
551 | } |
||
552 | #endif |
||
553 | |||
554 | |||
555 | /******************************************************************************* |
||
556 | * |
||
557 | * FUNCTION: AcpiExCreateMethod |
||
558 | * |
||
559 | * PARAMETERS: AmlStart - First byte of the method's AML |
||
560 | * AmlLength - AML byte count for this method |
||
561 | * WalkState - Current state |
||
562 | * |
||
563 | * RETURN: Status |
||
564 | * |
||
565 | * DESCRIPTION: Create a new method object |
||
566 | * |
||
567 | ******************************************************************************/ |
||
568 | |||
569 | ACPI_STATUS |
||
570 | AcpiExCreateMethod ( |
||
571 | UINT8 *AmlStart, |
||
572 | UINT32 AmlLength, |
||
573 | ACPI_WALK_STATE *WalkState) |
||
574 | { |
||
575 | ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; |
||
576 | ACPI_OPERAND_OBJECT *ObjDesc; |
||
577 | ACPI_STATUS Status; |
||
578 | UINT8 MethodFlags; |
||
579 | |||
580 | |||
581 | ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState); |
||
582 | |||
583 | |||
584 | /* Create a new method object */ |
||
585 | |||
586 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); |
||
587 | if (!ObjDesc) |
||
588 | { |
||
589 | Status = AE_NO_MEMORY; |
||
590 | goto Exit; |
||
591 | } |
||
592 | |||
593 | /* Save the method's AML pointer and length */ |
||
594 | |||
595 | ObjDesc->Method.AmlStart = AmlStart; |
||
596 | ObjDesc->Method.AmlLength = AmlLength; |
||
597 | |||
598 | /* |
||
2216 | Serge | 599 | * Disassemble the method flags. Split off the ArgCount, Serialized |
600 | * flag, and SyncLevel for efficiency. |
||
1498 | serge | 601 | */ |
602 | MethodFlags = (UINT8) Operand[1]->Integer.Value; |
||
603 | ObjDesc->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT); |
||
604 | |||
605 | /* |
||
606 | * Get the SyncLevel. If method is serialized, a mutex will be |
||
607 | * created for this method when it is parsed. |
||
608 | */ |
||
609 | if (MethodFlags & AML_METHOD_SERIALIZED) |
||
610 | { |
||
2216 | Serge | 611 | ObjDesc->Method.InfoFlags = ACPI_METHOD_SERIALIZED; |
612 | |||
1498 | serge | 613 | /* |
614 | * ACPI 1.0: SyncLevel = 0 |
||
615 | * ACPI 2.0: SyncLevel = SyncLevel in method declaration |
||
616 | */ |
||
617 | ObjDesc->Method.SyncLevel = (UINT8) |
||
618 | ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4); |
||
619 | } |
||
620 | |||
621 | /* Attach the new object to the method Node */ |
||
622 | |||
623 | Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], |
||
624 | ObjDesc, ACPI_TYPE_METHOD); |
||
625 | |||
626 | /* Remove local reference to the object */ |
||
627 | |||
628 | AcpiUtRemoveReference (ObjDesc); |
||
629 | |||
630 | Exit: |
||
631 | /* Remove a reference to the operand */ |
||
632 | |||
633 | AcpiUtRemoveReference (Operand[1]); |
||
634 | return_ACPI_STATUS (Status); |
||
635 | }> |
||
636 |