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1498 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: psscope - Parser scope stack management routines |
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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 | * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY |
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87 | * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A |
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88 | * PARTICULAR PURPOSE. |
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89 | * |
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90 | * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES |
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91 | * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR |
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92 | * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, |
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93 | * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY |
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94 | * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL |
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95 | * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS |
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96 | * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY |
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97 | * LIMITED REMEDY. |
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98 | * |
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99 | * 4.3. Licensee shall not export, either directly or indirectly, any of this |
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100 | * software or system incorporating such software without first obtaining any |
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101 | * required license or other approval from the U. S. Department of Commerce or |
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102 | * any other agency or department of the United States Government. In the |
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103 | * event Licensee exports any such software from the United States or |
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104 | * re-exports any such software from a foreign destination, Licensee shall |
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105 | * ensure that the distribution and export/re-export of the software is in |
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106 | * compliance with all laws, regulations, orders, or other restrictions of the |
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107 | * U.S. Export Administration Regulations. Licensee agrees that neither it nor |
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108 | * any of its subsidiaries will export/re-export any technical data, process, |
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109 | * software, or service, directly or indirectly, to any country for which the |
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110 | * United States government or any agency thereof requires an export license, |
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111 | * other governmental approval, or letter of assurance, without first obtaining |
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112 | * such license, approval or letter. |
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113 | * |
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114 | *****************************************************************************/ |
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115 | |||
116 | |||
117 | #include "acpi.h" |
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118 | #include "accommon.h" |
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119 | #include "acparser.h" |
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120 | |||
121 | #define _COMPONENT ACPI_PARSER |
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122 | ACPI_MODULE_NAME ("psscope") |
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123 | |||
124 | |||
125 | /******************************************************************************* |
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126 | * |
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127 | * FUNCTION: AcpiPsGetParentScope |
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128 | * |
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129 | * PARAMETERS: ParserState - Current parser state object |
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130 | * |
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131 | * RETURN: Pointer to an Op object |
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132 | * |
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133 | * DESCRIPTION: Get parent of current op being parsed |
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134 | * |
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135 | ******************************************************************************/ |
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136 | |||
137 | ACPI_PARSE_OBJECT * |
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138 | AcpiPsGetParentScope ( |
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139 | ACPI_PARSE_STATE *ParserState) |
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140 | { |
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141 | |||
142 | return (ParserState->Scope->ParseScope.Op); |
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143 | } |
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144 | |||
145 | |||
146 | /******************************************************************************* |
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147 | * |
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148 | * FUNCTION: AcpiPsHasCompletedScope |
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149 | * |
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150 | * PARAMETERS: ParserState - Current parser state object |
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151 | * |
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152 | * RETURN: Boolean, TRUE = scope completed. |
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153 | * |
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154 | * DESCRIPTION: Is parsing of current argument complete? Determined by |
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155 | * 1) AML pointer is at or beyond the end of the scope |
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156 | * 2) The scope argument count has reached zero. |
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157 | * |
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158 | ******************************************************************************/ |
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159 | |||
160 | BOOLEAN |
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161 | AcpiPsHasCompletedScope ( |
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162 | ACPI_PARSE_STATE *ParserState) |
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163 | { |
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164 | |||
165 | return ((BOOLEAN) |
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166 | ((ParserState->Aml >= ParserState->Scope->ParseScope.ArgEnd || |
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167 | !ParserState->Scope->ParseScope.ArgCount))); |
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168 | } |
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169 | |||
170 | |||
171 | /******************************************************************************* |
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172 | * |
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173 | * FUNCTION: AcpiPsInitScope |
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174 | * |
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175 | * PARAMETERS: ParserState - Current parser state object |
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176 | * Root - the Root Node of this new scope |
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177 | * |
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178 | * RETURN: Status |
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179 | * |
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180 | * DESCRIPTION: Allocate and init a new scope object |
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181 | * |
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182 | ******************************************************************************/ |
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183 | |||
184 | ACPI_STATUS |
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185 | AcpiPsInitScope ( |
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186 | ACPI_PARSE_STATE *ParserState, |
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187 | ACPI_PARSE_OBJECT *RootOp) |
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188 | { |
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189 | ACPI_GENERIC_STATE *Scope; |
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190 | |||
191 | |||
192 | ACPI_FUNCTION_TRACE_PTR (PsInitScope, RootOp); |
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193 | |||
194 | |||
195 | Scope = AcpiUtCreateGenericState (); |
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196 | if (!Scope) |
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197 | { |
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198 | return_ACPI_STATUS (AE_NO_MEMORY); |
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199 | } |
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200 | |||
201 | Scope->Common.DescriptorType = ACPI_DESC_TYPE_STATE_RPSCOPE; |
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202 | Scope->ParseScope.Op = RootOp; |
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203 | Scope->ParseScope.ArgCount = ACPI_VAR_ARGS; |
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204 | Scope->ParseScope.ArgEnd = ParserState->AmlEnd; |
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205 | Scope->ParseScope.PkgEnd = ParserState->AmlEnd; |
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206 | |||
207 | ParserState->Scope = Scope; |
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208 | ParserState->StartOp = RootOp; |
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209 | |||
210 | return_ACPI_STATUS (AE_OK); |
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211 | } |
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212 | |||
213 | |||
214 | /******************************************************************************* |
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215 | * |
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216 | * FUNCTION: AcpiPsPushScope |
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217 | * |
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218 | * PARAMETERS: ParserState - Current parser state object |
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219 | * Op - Current op to be pushed |
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220 | * RemainingArgs - List of args remaining |
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221 | * ArgCount - Fixed or variable number of args |
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222 | * |
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223 | * RETURN: Status |
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224 | * |
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225 | * DESCRIPTION: Push current op to begin parsing its argument |
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226 | * |
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227 | ******************************************************************************/ |
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228 | |||
229 | ACPI_STATUS |
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230 | AcpiPsPushScope ( |
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231 | ACPI_PARSE_STATE *ParserState, |
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232 | ACPI_PARSE_OBJECT *Op, |
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233 | UINT32 RemainingArgs, |
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234 | UINT32 ArgCount) |
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235 | { |
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236 | ACPI_GENERIC_STATE *Scope; |
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237 | |||
238 | |||
239 | ACPI_FUNCTION_TRACE_PTR (PsPushScope, Op); |
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240 | |||
241 | |||
242 | Scope = AcpiUtCreateGenericState (); |
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243 | if (!Scope) |
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244 | { |
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245 | return_ACPI_STATUS (AE_NO_MEMORY); |
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246 | } |
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247 | |||
248 | Scope->Common.DescriptorType = ACPI_DESC_TYPE_STATE_PSCOPE; |
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249 | Scope->ParseScope.Op = Op; |
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250 | Scope->ParseScope.ArgList = RemainingArgs; |
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251 | Scope->ParseScope.ArgCount = ArgCount; |
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252 | Scope->ParseScope.PkgEnd = ParserState->PkgEnd; |
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253 | |||
254 | /* Push onto scope stack */ |
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255 | |||
256 | AcpiUtPushGenericState (&ParserState->Scope, Scope); |
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257 | |||
258 | if (ArgCount == ACPI_VAR_ARGS) |
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259 | { |
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260 | /* Multiple arguments */ |
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261 | |||
262 | Scope->ParseScope.ArgEnd = ParserState->PkgEnd; |
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263 | } |
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264 | else |
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265 | { |
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266 | /* Single argument */ |
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267 | |||
268 | Scope->ParseScope.ArgEnd = ACPI_TO_POINTER (ACPI_MAX_PTR); |
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269 | } |
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270 | |||
271 | return_ACPI_STATUS (AE_OK); |
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272 | } |
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273 | |||
274 | |||
275 | /******************************************************************************* |
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276 | * |
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277 | * FUNCTION: AcpiPsPopScope |
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278 | * |
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279 | * PARAMETERS: ParserState - Current parser state object |
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280 | * Op - Where the popped op is returned |
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281 | * ArgList - Where the popped "next argument" is |
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282 | * returned |
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283 | * ArgCount - Count of objects in ArgList |
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284 | * |
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285 | * RETURN: Status |
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286 | * |
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287 | * DESCRIPTION: Return to parsing a previous op |
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288 | * |
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289 | ******************************************************************************/ |
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290 | |||
291 | void |
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292 | AcpiPsPopScope ( |
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293 | ACPI_PARSE_STATE *ParserState, |
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294 | ACPI_PARSE_OBJECT **Op, |
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295 | UINT32 *ArgList, |
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296 | UINT32 *ArgCount) |
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297 | { |
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298 | ACPI_GENERIC_STATE *Scope = ParserState->Scope; |
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299 | |||
300 | |||
301 | ACPI_FUNCTION_TRACE (PsPopScope); |
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302 | |||
303 | |||
304 | /* Only pop the scope if there is in fact a next scope */ |
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305 | |||
306 | if (Scope->Common.Next) |
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307 | { |
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308 | Scope = AcpiUtPopGenericState (&ParserState->Scope); |
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309 | |||
310 | /* Return to parsing previous op */ |
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311 | |||
312 | *Op = Scope->ParseScope.Op; |
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313 | *ArgList = Scope->ParseScope.ArgList; |
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314 | *ArgCount = Scope->ParseScope.ArgCount; |
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315 | ParserState->PkgEnd = Scope->ParseScope.PkgEnd; |
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316 | |||
317 | /* All done with this scope state structure */ |
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318 | |||
319 | AcpiUtDeleteGenericState (Scope); |
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320 | } |
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321 | else |
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322 | { |
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323 | /* Empty parse stack, prepare to fetch next opcode */ |
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324 | |||
325 | *Op = NULL; |
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326 | *ArgList = 0; |
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327 | *ArgCount = 0; |
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328 | } |
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329 | |||
330 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, |
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331 | "Popped Op %p Args %X\n", *Op, *ArgCount)); |
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332 | return_VOID; |
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333 | } |
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334 | |||
335 | |||
336 | /******************************************************************************* |
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337 | * |
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338 | * FUNCTION: AcpiPsCleanupScope |
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339 | * |
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340 | * PARAMETERS: ParserState - Current parser state object |
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341 | * |
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342 | * RETURN: None |
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343 | * |
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344 | * DESCRIPTION: Destroy available list, remaining stack levels, and return |
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345 | * root scope |
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346 | * |
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347 | ******************************************************************************/ |
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348 | |||
349 | void |
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350 | AcpiPsCleanupScope ( |
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351 | ACPI_PARSE_STATE *ParserState) |
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352 | { |
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353 | ACPI_GENERIC_STATE *Scope; |
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354 | |||
355 | |||
356 | ACPI_FUNCTION_TRACE_PTR (PsCleanupScope, ParserState); |
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357 | |||
358 | |||
359 | if (!ParserState) |
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360 | { |
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361 | return_VOID; |
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362 | } |
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363 | |||
364 | /* Delete anything on the scope stack */ |
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365 | |||
366 | while (ParserState->Scope) |
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367 | { |
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368 | Scope = AcpiUtPopGenericState (&ParserState->Scope); |
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369 | AcpiUtDeleteGenericState (Scope); |
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370 | } |
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371 | |||
372 | return_VOID; |
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373 | } |
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374 |