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1498 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: psargs - Parse AML opcode arguments |
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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 | #define __PSARGS_C__ |
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117 | |||
118 | #include "acpi.h" |
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119 | #include "accommon.h" |
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120 | #include "acparser.h" |
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121 | #include "amlcode.h" |
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122 | #include "acnamesp.h" |
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123 | #include "acdispat.h" |
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124 | |||
125 | #define _COMPONENT ACPI_PARSER |
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126 | ACPI_MODULE_NAME ("psargs") |
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127 | |||
128 | /* Local prototypes */ |
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129 | |||
130 | static UINT32 |
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131 | AcpiPsGetNextPackageLength ( |
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132 | ACPI_PARSE_STATE *ParserState); |
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133 | |||
134 | static ACPI_PARSE_OBJECT * |
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135 | AcpiPsGetNextField ( |
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136 | ACPI_PARSE_STATE *ParserState); |
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137 | |||
138 | |||
139 | /******************************************************************************* |
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140 | * |
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141 | * FUNCTION: AcpiPsGetNextPackageLength |
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142 | * |
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143 | * PARAMETERS: ParserState - Current parser state object |
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144 | * |
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145 | * RETURN: Decoded package length. On completion, the AML pointer points |
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146 | * past the length byte or bytes. |
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147 | * |
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148 | * DESCRIPTION: Decode and return a package length field. |
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149 | * Note: Largest package length is 28 bits, from ACPI specification |
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150 | * |
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151 | ******************************************************************************/ |
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152 | |||
153 | static UINT32 |
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154 | AcpiPsGetNextPackageLength ( |
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155 | ACPI_PARSE_STATE *ParserState) |
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156 | { |
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157 | UINT8 *Aml = ParserState->Aml; |
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158 | UINT32 PackageLength = 0; |
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159 | UINT32 ByteCount; |
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160 | UINT8 ByteZeroMask = 0x3F; /* Default [0:5] */ |
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161 | |||
162 | |||
163 | ACPI_FUNCTION_TRACE (PsGetNextPackageLength); |
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164 | |||
165 | |||
166 | /* |
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167 | * Byte 0 bits [6:7] contain the number of additional bytes |
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168 | * used to encode the package length, either 0,1,2, or 3 |
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169 | */ |
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170 | ByteCount = (Aml[0] >> 6); |
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171 | ParserState->Aml += ((ACPI_SIZE) ByteCount + 1); |
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172 | |||
173 | /* Get bytes 3, 2, 1 as needed */ |
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174 | |||
175 | while (ByteCount) |
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176 | { |
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177 | /* |
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178 | * Final bit positions for the package length bytes: |
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179 | * Byte3->[20:27] |
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180 | * Byte2->[12:19] |
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181 | * Byte1->[04:11] |
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182 | * Byte0->[00:03] |
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183 | */ |
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184 | PackageLength |= (Aml[ByteCount] << ((ByteCount << 3) - 4)); |
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185 | |||
186 | ByteZeroMask = 0x0F; /* Use bits [0:3] of byte 0 */ |
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187 | ByteCount--; |
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188 | } |
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189 | |||
190 | /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */ |
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191 | |||
192 | PackageLength |= (Aml[0] & ByteZeroMask); |
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193 | return_UINT32 (PackageLength); |
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194 | } |
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195 | |||
196 | |||
197 | /******************************************************************************* |
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198 | * |
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199 | * FUNCTION: AcpiPsGetNextPackageEnd |
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200 | * |
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201 | * PARAMETERS: ParserState - Current parser state object |
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202 | * |
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203 | * RETURN: Pointer to end-of-package +1 |
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204 | * |
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205 | * DESCRIPTION: Get next package length and return a pointer past the end of |
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206 | * the package. Consumes the package length field |
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207 | * |
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208 | ******************************************************************************/ |
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209 | |||
210 | UINT8 * |
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211 | AcpiPsGetNextPackageEnd ( |
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212 | ACPI_PARSE_STATE *ParserState) |
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213 | { |
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214 | UINT8 *Start = ParserState->Aml; |
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215 | UINT32 PackageLength; |
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216 | |||
217 | |||
218 | ACPI_FUNCTION_TRACE (PsGetNextPackageEnd); |
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219 | |||
220 | |||
221 | /* Function below updates ParserState->Aml */ |
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222 | |||
223 | PackageLength = AcpiPsGetNextPackageLength (ParserState); |
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224 | |||
225 | return_PTR (Start + PackageLength); /* end of package */ |
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226 | } |
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227 | |||
228 | |||
229 | /******************************************************************************* |
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230 | * |
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231 | * FUNCTION: AcpiPsGetNextNamestring |
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232 | * |
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233 | * PARAMETERS: ParserState - Current parser state object |
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234 | * |
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235 | * RETURN: Pointer to the start of the name string (pointer points into |
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236 | * the AML. |
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237 | * |
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238 | * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name |
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239 | * prefix characters. Set parser state to point past the string. |
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240 | * (Name is consumed from the AML.) |
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241 | * |
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242 | ******************************************************************************/ |
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243 | |||
244 | char * |
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245 | AcpiPsGetNextNamestring ( |
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246 | ACPI_PARSE_STATE *ParserState) |
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247 | { |
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248 | UINT8 *Start = ParserState->Aml; |
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249 | UINT8 *End = ParserState->Aml; |
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250 | |||
251 | |||
252 | ACPI_FUNCTION_TRACE (PsGetNextNamestring); |
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253 | |||
254 | |||
255 | /* Point past any namestring prefix characters (backslash or carat) */ |
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256 | |||
257 | while (AcpiPsIsPrefixChar (*End)) |
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258 | { |
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259 | End++; |
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260 | } |
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261 | |||
262 | /* Decode the path prefix character */ |
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263 | |||
264 | switch (*End) |
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265 | { |
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266 | case 0: |
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267 | |||
268 | /* NullName */ |
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269 | |||
270 | if (End == Start) |
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271 | { |
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272 | Start = NULL; |
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273 | } |
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274 | End++; |
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275 | break; |
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276 | |||
277 | case AML_DUAL_NAME_PREFIX: |
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278 | |||
279 | /* Two name segments */ |
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280 | |||
281 | End += 1 + (2 * ACPI_NAME_SIZE); |
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282 | break; |
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283 | |||
284 | case AML_MULTI_NAME_PREFIX_OP: |
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285 | |||
286 | /* Multiple name segments, 4 chars each, count in next byte */ |
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287 | |||
288 | End += 2 + (*(End + 1) * ACPI_NAME_SIZE); |
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289 | break; |
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290 | |||
291 | default: |
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292 | |||
293 | /* Single name segment */ |
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294 | |||
295 | End += ACPI_NAME_SIZE; |
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296 | break; |
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297 | } |
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298 | |||
299 | ParserState->Aml = End; |
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300 | return_PTR ((char *) Start); |
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301 | } |
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302 | |||
303 | |||
304 | /******************************************************************************* |
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305 | * |
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306 | * FUNCTION: AcpiPsGetNextNamepath |
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307 | * |
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308 | * PARAMETERS: ParserState - Current parser state object |
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309 | * Arg - Where the namepath will be stored |
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310 | * ArgCount - If the namepath points to a control method |
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311 | * the method's argument is returned here. |
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312 | * PossibleMethodCall - Whether the namepath can possibly be the |
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313 | * start of a method call |
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314 | * |
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315 | * RETURN: Status |
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316 | * |
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317 | * DESCRIPTION: Get next name (if method call, return # of required args). |
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318 | * Names are looked up in the internal namespace to determine |
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319 | * if the name represents a control method. If a method |
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320 | * is found, the number of arguments to the method is returned. |
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321 | * This information is critical for parsing to continue correctly. |
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322 | * |
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323 | ******************************************************************************/ |
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324 | |||
325 | ACPI_STATUS |
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326 | AcpiPsGetNextNamepath ( |
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327 | ACPI_WALK_STATE *WalkState, |
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328 | ACPI_PARSE_STATE *ParserState, |
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329 | ACPI_PARSE_OBJECT *Arg, |
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330 | BOOLEAN PossibleMethodCall) |
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331 | { |
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332 | ACPI_STATUS Status; |
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333 | char *Path; |
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334 | ACPI_PARSE_OBJECT *NameOp; |
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335 | ACPI_OPERAND_OBJECT *MethodDesc; |
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336 | ACPI_NAMESPACE_NODE *Node; |
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337 | UINT8 *Start = ParserState->Aml; |
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338 | |||
339 | |||
340 | ACPI_FUNCTION_TRACE (PsGetNextNamepath); |
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341 | |||
342 | |||
343 | Path = AcpiPsGetNextNamestring (ParserState); |
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344 | AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); |
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345 | |||
346 | /* Null path case is allowed, just exit */ |
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347 | |||
348 | if (!Path) |
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349 | { |
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350 | Arg->Common.Value.Name = Path; |
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351 | return_ACPI_STATUS (AE_OK); |
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352 | } |
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353 | |||
354 | /* |
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355 | * Lookup the name in the internal namespace, starting with the current |
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356 | * scope. We don't want to add anything new to the namespace here, |
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357 | * however, so we use MODE_EXECUTE. |
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358 | * Allow searching of the parent tree, but don't open a new scope - |
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359 | * we just want to lookup the object (must be mode EXECUTE to perform |
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360 | * the upsearch) |
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361 | */ |
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362 | Status = AcpiNsLookup (WalkState->ScopeInfo, Path, |
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363 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
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364 | ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node); |
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365 | |||
366 | /* |
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367 | * If this name is a control method invocation, we must |
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368 | * setup the method call |
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369 | */ |
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370 | if (ACPI_SUCCESS (Status) && |
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371 | PossibleMethodCall && |
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372 | (Node->Type == ACPI_TYPE_METHOD)) |
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373 | { |
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374 | if (WalkState->Opcode == AML_UNLOAD_OP) |
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375 | { |
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376 | /* |
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377 | * AcpiPsGetNextNamestring has increased the AML pointer, |
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378 | * so we need to restore the saved AML pointer for method call. |
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379 | */ |
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380 | WalkState->ParserState.Aml = Start; |
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381 | WalkState->ArgCount = 1; |
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382 | AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); |
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383 | return_ACPI_STATUS (AE_OK); |
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384 | } |
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385 | |||
386 | /* This name is actually a control method invocation */ |
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387 | |||
388 | MethodDesc = AcpiNsGetAttachedObject (Node); |
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389 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, |
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390 | "Control Method - %p Desc %p Path=%p\n", Node, MethodDesc, Path)); |
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391 | |||
392 | NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP); |
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393 | if (!NameOp) |
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394 | { |
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395 | return_ACPI_STATUS (AE_NO_MEMORY); |
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396 | } |
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397 | |||
398 | /* Change Arg into a METHOD CALL and attach name to it */ |
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399 | |||
400 | AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); |
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401 | NameOp->Common.Value.Name = Path; |
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402 | |||
403 | /* Point METHODCALL/NAME to the METHOD Node */ |
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404 | |||
405 | NameOp->Common.Node = Node; |
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406 | AcpiPsAppendArg (Arg, NameOp); |
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407 | |||
408 | if (!MethodDesc) |
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409 | { |
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410 | ACPI_ERROR ((AE_INFO, |
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411 | "Control Method %p has no attached object", |
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412 | Node)); |
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413 | return_ACPI_STATUS (AE_AML_INTERNAL); |
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414 | } |
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415 | |||
416 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, |
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417 | "Control Method - %p Args %X\n", |
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418 | Node, MethodDesc->Method.ParamCount)); |
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419 | |||
420 | /* Get the number of arguments to expect */ |
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421 | |||
422 | WalkState->ArgCount = MethodDesc->Method.ParamCount; |
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423 | return_ACPI_STATUS (AE_OK); |
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424 | } |
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425 | |||
426 | /* |
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427 | * Special handling if the name was not found during the lookup - |
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428 | * some NotFound cases are allowed |
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429 | */ |
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430 | if (Status == AE_NOT_FOUND) |
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431 | { |
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432 | /* 1) NotFound is ok during load pass 1/2 (allow forward references) */ |
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433 | |||
434 | if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) != |
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435 | ACPI_PARSE_EXECUTE) |
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436 | { |
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437 | Status = AE_OK; |
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438 | } |
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439 | |||
440 | /* 2) NotFound during a CondRefOf(x) is ok by definition */ |
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441 | |||
442 | else if (WalkState->Op->Common.AmlOpcode == AML_COND_REF_OF_OP) |
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443 | { |
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444 | Status = AE_OK; |
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445 | } |
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446 | |||
447 | /* |
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448 | * 3) NotFound while building a Package is ok at this point, we |
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449 | * may flag as an error later if slack mode is not enabled. |
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450 | * (Some ASL code depends on allowing this behavior) |
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451 | */ |
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452 | else if ((Arg->Common.Parent) && |
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453 | ((Arg->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || |
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454 | (Arg->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))) |
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455 | { |
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456 | Status = AE_OK; |
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457 | } |
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458 | } |
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459 | |||
460 | /* Final exception check (may have been changed from code above) */ |
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461 | |||
462 | if (ACPI_FAILURE (Status)) |
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463 | { |
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464 | ACPI_ERROR_NAMESPACE (Path, Status); |
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465 | |||
466 | if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) == |
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467 | ACPI_PARSE_EXECUTE) |
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468 | { |
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469 | /* Report a control method execution error */ |
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470 | |||
471 | Status = AcpiDsMethodError (Status, WalkState); |
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472 | } |
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473 | } |
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474 | |||
475 | /* Save the namepath */ |
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476 | |||
477 | Arg->Common.Value.Name = Path; |
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478 | return_ACPI_STATUS (Status); |
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479 | } |
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480 | |||
481 | |||
482 | /******************************************************************************* |
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483 | * |
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484 | * FUNCTION: AcpiPsGetNextSimpleArg |
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485 | * |
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486 | * PARAMETERS: ParserState - Current parser state object |
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487 | * ArgType - The argument type (AML_*_ARG) |
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488 | * Arg - Where the argument is returned |
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489 | * |
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490 | * RETURN: None |
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491 | * |
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492 | * DESCRIPTION: Get the next simple argument (constant, string, or namestring) |
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493 | * |
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494 | ******************************************************************************/ |
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495 | |||
496 | void |
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497 | AcpiPsGetNextSimpleArg ( |
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498 | ACPI_PARSE_STATE *ParserState, |
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499 | UINT32 ArgType, |
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500 | ACPI_PARSE_OBJECT *Arg) |
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501 | { |
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502 | UINT32 Length; |
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503 | UINT16 Opcode; |
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504 | UINT8 *Aml = ParserState->Aml; |
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505 | |||
506 | |||
507 | ACPI_FUNCTION_TRACE_U32 (PsGetNextSimpleArg, ArgType); |
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508 | |||
509 | |||
510 | switch (ArgType) |
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511 | { |
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512 | case ARGP_BYTEDATA: |
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513 | |||
514 | /* Get 1 byte from the AML stream */ |
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515 | |||
516 | Opcode = AML_BYTE_OP; |
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517 | Arg->Common.Value.Integer = (UINT64) *Aml; |
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518 | Length = 1; |
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519 | break; |
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520 | |||
521 | |||
522 | case ARGP_WORDDATA: |
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523 | |||
524 | /* Get 2 bytes from the AML stream */ |
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525 | |||
526 | Opcode = AML_WORD_OP; |
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527 | ACPI_MOVE_16_TO_64 (&Arg->Common.Value.Integer, Aml); |
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528 | Length = 2; |
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529 | break; |
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530 | |||
531 | |||
532 | case ARGP_DWORDDATA: |
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533 | |||
534 | /* Get 4 bytes from the AML stream */ |
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535 | |||
536 | Opcode = AML_DWORD_OP; |
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537 | ACPI_MOVE_32_TO_64 (&Arg->Common.Value.Integer, Aml); |
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538 | Length = 4; |
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539 | break; |
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540 | |||
541 | |||
542 | case ARGP_QWORDDATA: |
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543 | |||
544 | /* Get 8 bytes from the AML stream */ |
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545 | |||
546 | Opcode = AML_QWORD_OP; |
||
547 | ACPI_MOVE_64_TO_64 (&Arg->Common.Value.Integer, Aml); |
||
548 | Length = 8; |
||
549 | break; |
||
550 | |||
551 | |||
552 | case ARGP_CHARLIST: |
||
553 | |||
554 | /* Get a pointer to the string, point past the string */ |
||
555 | |||
556 | Opcode = AML_STRING_OP; |
||
557 | Arg->Common.Value.String = ACPI_CAST_PTR (char, Aml); |
||
558 | |||
559 | /* Find the null terminator */ |
||
560 | |||
561 | Length = 0; |
||
562 | while (Aml[Length]) |
||
563 | { |
||
564 | Length++; |
||
565 | } |
||
566 | Length++; |
||
567 | break; |
||
568 | |||
569 | |||
570 | case ARGP_NAME: |
||
571 | case ARGP_NAMESTRING: |
||
572 | |||
573 | AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); |
||
574 | Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState); |
||
575 | return_VOID; |
||
576 | |||
577 | |||
578 | default: |
||
579 | |||
580 | ACPI_ERROR ((AE_INFO, "Invalid ArgType 0x%X", ArgType)); |
||
581 | return_VOID; |
||
582 | } |
||
583 | |||
584 | AcpiPsInitOp (Arg, Opcode); |
||
585 | ParserState->Aml += Length; |
||
586 | return_VOID; |
||
587 | } |
||
588 | |||
589 | |||
590 | /******************************************************************************* |
||
591 | * |
||
592 | * FUNCTION: AcpiPsGetNextField |
||
593 | * |
||
594 | * PARAMETERS: ParserState - Current parser state object |
||
595 | * |
||
596 | * RETURN: A newly allocated FIELD op |
||
597 | * |
||
598 | * DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField) |
||
599 | * |
||
600 | ******************************************************************************/ |
||
601 | |||
602 | static ACPI_PARSE_OBJECT * |
||
603 | AcpiPsGetNextField ( |
||
604 | ACPI_PARSE_STATE *ParserState) |
||
605 | { |
||
606 | UINT32 AmlOffset = (UINT32) |
||
607 | ACPI_PTR_DIFF (ParserState->Aml, |
||
608 | ParserState->AmlStart); |
||
609 | ACPI_PARSE_OBJECT *Field; |
||
610 | UINT16 Opcode; |
||
611 | UINT32 Name; |
||
612 | |||
613 | |||
614 | ACPI_FUNCTION_TRACE (PsGetNextField); |
||
615 | |||
616 | |||
617 | /* Determine field type */ |
||
618 | |||
619 | switch (ACPI_GET8 (ParserState->Aml)) |
||
620 | { |
||
621 | default: |
||
622 | |||
623 | Opcode = AML_INT_NAMEDFIELD_OP; |
||
624 | break; |
||
625 | |||
626 | case 0x00: |
||
627 | |||
628 | Opcode = AML_INT_RESERVEDFIELD_OP; |
||
629 | ParserState->Aml++; |
||
630 | break; |
||
631 | |||
632 | case 0x01: |
||
633 | |||
634 | Opcode = AML_INT_ACCESSFIELD_OP; |
||
635 | ParserState->Aml++; |
||
636 | break; |
||
637 | } |
||
638 | |||
639 | /* Allocate a new field op */ |
||
640 | |||
641 | Field = AcpiPsAllocOp (Opcode); |
||
642 | if (!Field) |
||
643 | { |
||
644 | return_PTR (NULL); |
||
645 | } |
||
646 | |||
647 | Field->Common.AmlOffset = AmlOffset; |
||
648 | |||
649 | /* Decode the field type */ |
||
650 | |||
651 | switch (Opcode) |
||
652 | { |
||
653 | case AML_INT_NAMEDFIELD_OP: |
||
654 | |||
655 | /* Get the 4-character name */ |
||
656 | |||
657 | ACPI_MOVE_32_TO_32 (&Name, ParserState->Aml); |
||
658 | AcpiPsSetName (Field, Name); |
||
659 | ParserState->Aml += ACPI_NAME_SIZE; |
||
660 | |||
661 | /* Get the length which is encoded as a package length */ |
||
662 | |||
663 | Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState); |
||
664 | break; |
||
665 | |||
666 | |||
667 | case AML_INT_RESERVEDFIELD_OP: |
||
668 | |||
669 | /* Get the length which is encoded as a package length */ |
||
670 | |||
671 | Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState); |
||
672 | break; |
||
673 | |||
674 | |||
675 | case AML_INT_ACCESSFIELD_OP: |
||
676 | |||
677 | /* |
||
678 | * Get AccessType and AccessAttrib and merge into the field Op |
||
679 | * AccessType is first operand, AccessAttribute is second |
||
680 | */ |
||
681 | Field->Common.Value.Integer = (((UINT32) ACPI_GET8 (ParserState->Aml) << 8)); |
||
682 | ParserState->Aml++; |
||
683 | Field->Common.Value.Integer |= ACPI_GET8 (ParserState->Aml); |
||
684 | ParserState->Aml++; |
||
685 | break; |
||
686 | |||
687 | default: |
||
688 | |||
689 | /* Opcode was set in previous switch */ |
||
690 | break; |
||
691 | } |
||
692 | |||
693 | return_PTR (Field); |
||
694 | } |
||
695 | |||
696 | |||
697 | /******************************************************************************* |
||
698 | * |
||
699 | * FUNCTION: AcpiPsGetNextArg |
||
700 | * |
||
701 | * PARAMETERS: WalkState - Current state |
||
702 | * ParserState - Current parser state object |
||
703 | * ArgType - The argument type (AML_*_ARG) |
||
704 | * ReturnArg - Where the next arg is returned |
||
705 | * |
||
706 | * RETURN: Status, and an op object containing the next argument. |
||
707 | * |
||
708 | * DESCRIPTION: Get next argument (including complex list arguments that require |
||
709 | * pushing the parser stack) |
||
710 | * |
||
711 | ******************************************************************************/ |
||
712 | |||
713 | ACPI_STATUS |
||
714 | AcpiPsGetNextArg ( |
||
715 | ACPI_WALK_STATE *WalkState, |
||
716 | ACPI_PARSE_STATE *ParserState, |
||
717 | UINT32 ArgType, |
||
718 | ACPI_PARSE_OBJECT **ReturnArg) |
||
719 | { |
||
720 | ACPI_PARSE_OBJECT *Arg = NULL; |
||
721 | ACPI_PARSE_OBJECT *Prev = NULL; |
||
722 | ACPI_PARSE_OBJECT *Field; |
||
723 | UINT32 Subop; |
||
724 | ACPI_STATUS Status = AE_OK; |
||
725 | |||
726 | |||
727 | ACPI_FUNCTION_TRACE_PTR (PsGetNextArg, ParserState); |
||
728 | |||
729 | |||
730 | switch (ArgType) |
||
731 | { |
||
732 | case ARGP_BYTEDATA: |
||
733 | case ARGP_WORDDATA: |
||
734 | case ARGP_DWORDDATA: |
||
735 | case ARGP_CHARLIST: |
||
736 | case ARGP_NAME: |
||
737 | case ARGP_NAMESTRING: |
||
738 | |||
739 | /* Constants, strings, and namestrings are all the same size */ |
||
740 | |||
741 | Arg = AcpiPsAllocOp (AML_BYTE_OP); |
||
742 | if (!Arg) |
||
743 | { |
||
744 | return_ACPI_STATUS (AE_NO_MEMORY); |
||
745 | } |
||
746 | AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg); |
||
747 | break; |
||
748 | |||
749 | |||
750 | case ARGP_PKGLENGTH: |
||
751 | |||
752 | /* Package length, nothing returned */ |
||
753 | |||
754 | ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState); |
||
755 | break; |
||
756 | |||
757 | |||
758 | case ARGP_FIELDLIST: |
||
759 | |||
760 | if (ParserState->Aml < ParserState->PkgEnd) |
||
761 | { |
||
762 | /* Non-empty list */ |
||
763 | |||
764 | while (ParserState->Aml < ParserState->PkgEnd) |
||
765 | { |
||
766 | Field = AcpiPsGetNextField (ParserState); |
||
767 | if (!Field) |
||
768 | { |
||
769 | return_ACPI_STATUS (AE_NO_MEMORY); |
||
770 | } |
||
771 | |||
772 | if (Prev) |
||
773 | { |
||
774 | Prev->Common.Next = Field; |
||
775 | } |
||
776 | else |
||
777 | { |
||
778 | Arg = Field; |
||
779 | } |
||
780 | Prev = Field; |
||
781 | } |
||
782 | |||
783 | /* Skip to End of byte data */ |
||
784 | |||
785 | ParserState->Aml = ParserState->PkgEnd; |
||
786 | } |
||
787 | break; |
||
788 | |||
789 | |||
790 | case ARGP_BYTELIST: |
||
791 | |||
792 | if (ParserState->Aml < ParserState->PkgEnd) |
||
793 | { |
||
794 | /* Non-empty list */ |
||
795 | |||
796 | Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP); |
||
797 | if (!Arg) |
||
798 | { |
||
799 | return_ACPI_STATUS (AE_NO_MEMORY); |
||
800 | } |
||
801 | |||
802 | /* Fill in bytelist data */ |
||
803 | |||
804 | Arg->Common.Value.Size = (UINT32) |
||
805 | ACPI_PTR_DIFF (ParserState->PkgEnd, ParserState->Aml); |
||
806 | Arg->Named.Data = ParserState->Aml; |
||
807 | |||
808 | /* Skip to End of byte data */ |
||
809 | |||
810 | ParserState->Aml = ParserState->PkgEnd; |
||
811 | } |
||
812 | break; |
||
813 | |||
814 | |||
815 | case ARGP_TARGET: |
||
816 | case ARGP_SUPERNAME: |
||
817 | case ARGP_SIMPLENAME: |
||
818 | |||
819 | Subop = AcpiPsPeekOpcode (ParserState); |
||
820 | if (Subop == 0 || |
||
821 | AcpiPsIsLeadingChar (Subop) || |
||
822 | AcpiPsIsPrefixChar (Subop)) |
||
823 | { |
||
824 | /* NullName or NameString */ |
||
825 | |||
826 | Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP); |
||
827 | if (!Arg) |
||
828 | { |
||
829 | return_ACPI_STATUS (AE_NO_MEMORY); |
||
830 | } |
||
831 | |||
832 | /* To support SuperName arg of Unload */ |
||
833 | |||
834 | if (WalkState->Opcode == AML_UNLOAD_OP) |
||
835 | { |
||
836 | Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 1); |
||
837 | |||
838 | /* |
||
839 | * If the SuperName arg of Unload is a method call, |
||
840 | * we have restored the AML pointer, just free this Arg |
||
841 | */ |
||
842 | if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP) |
||
843 | { |
||
844 | AcpiPsFreeOp (Arg); |
||
845 | Arg = NULL; |
||
846 | } |
||
847 | } |
||
848 | else |
||
849 | { |
||
850 | Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 0); |
||
851 | } |
||
852 | } |
||
853 | else |
||
854 | { |
||
855 | /* Single complex argument, nothing returned */ |
||
856 | |||
857 | WalkState->ArgCount = 1; |
||
858 | } |
||
859 | break; |
||
860 | |||
861 | |||
862 | case ARGP_DATAOBJ: |
||
863 | case ARGP_TERMARG: |
||
864 | |||
865 | /* Single complex argument, nothing returned */ |
||
866 | |||
867 | WalkState->ArgCount = 1; |
||
868 | break; |
||
869 | |||
870 | |||
871 | case ARGP_DATAOBJLIST: |
||
872 | case ARGP_TERMLIST: |
||
873 | case ARGP_OBJLIST: |
||
874 | |||
875 | if (ParserState->Aml < ParserState->PkgEnd) |
||
876 | { |
||
877 | /* Non-empty list of variable arguments, nothing returned */ |
||
878 | |||
879 | WalkState->ArgCount = ACPI_VAR_ARGS; |
||
880 | } |
||
881 | break; |
||
882 | |||
883 | |||
884 | default: |
||
885 | |||
886 | ACPI_ERROR ((AE_INFO, "Invalid ArgType: 0x%X", ArgType)); |
||
887 | Status = AE_AML_OPERAND_TYPE; |
||
888 | break; |
||
889 | } |
||
890 | |||
891 | *ReturnArg = Arg; |
||
892 | return_ACPI_STATUS (Status); |
||
893 | }>>>>><>><>><> |