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1498 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing |
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4 | * parents and siblings and Scope manipulation |
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5 | * |
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6 | *****************************************************************************/ |
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7 | |||
8 | /****************************************************************************** |
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9 | * |
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10 | * 1. Copyright Notice |
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11 | * |
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2216 | Serge | 12 | * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp. |
1498 | serge | 13 | * All rights reserved. |
14 | * |
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15 | * 2. License |
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16 | * |
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17 | * 2.1. This is your license from Intel Corp. under its intellectual property |
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18 | * rights. You may have additional license terms from the party that provided |
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19 | * you this software, covering your right to use that party's intellectual |
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20 | * property rights. |
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21 | * |
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22 | * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a |
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23 | * copy of the source code appearing in this file ("Covered Code") an |
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24 | * irrevocable, perpetual, worldwide license under Intel's copyrights in the |
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25 | * base code distributed originally by Intel ("Original Intel Code") to copy, |
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26 | * make derivatives, distribute, use and display any portion of the Covered |
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27 | * Code in any form, with the right to sublicense such rights; and |
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28 | * |
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29 | * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent |
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30 | * license (with the right to sublicense), under only those claims of Intel |
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31 | * patents that are infringed by the Original Intel Code, to make, use, sell, |
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32 | * offer to sell, and import the Covered Code and derivative works thereof |
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33 | * solely to the minimum extent necessary to exercise the above copyright |
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34 | * license, and in no event shall the patent license extend to any additions |
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35 | * to or modifications of the Original Intel Code. No other license or right |
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36 | * is granted directly or by implication, estoppel or otherwise; |
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37 | * |
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38 | * The above copyright and patent license is granted only if the following |
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39 | * conditions are met: |
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40 | * |
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41 | * 3. Conditions |
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42 | * |
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43 | * 3.1. Redistribution of Source with Rights to Further Distribute Source. |
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44 | * Redistribution of source code of any substantial portion of the Covered |
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45 | * Code or modification with rights to further distribute source must include |
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46 | * the above Copyright Notice, the above License, this list of Conditions, |
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47 | * and the following Disclaimer and Export Compliance provision. In addition, |
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48 | * Licensee must cause all Covered Code to which Licensee contributes to |
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49 | * contain a file documenting the changes Licensee made to create that Covered |
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50 | * Code and the date of any change. Licensee must include in that file the |
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51 | * documentation of any changes made by any predecessor Licensee. Licensee |
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52 | * must include a prominent statement that the modification is derived, |
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53 | * directly or indirectly, from Original Intel Code. |
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54 | * |
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55 | * 3.2. Redistribution of Source with no Rights to Further Distribute Source. |
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56 | * Redistribution of source code of any substantial portion of the Covered |
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57 | * Code or modification without rights to further distribute source must |
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58 | * include the following Disclaimer and Export Compliance provision in the |
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59 | * documentation and/or other materials provided with distribution. In |
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60 | * addition, Licensee may not authorize further sublicense of source of any |
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61 | * portion of the Covered Code, and must include terms to the effect that the |
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62 | * license from Licensee to its licensee is limited to the intellectual |
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63 | * property embodied in the software Licensee provides to its licensee, and |
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64 | * not to intellectual property embodied in modifications its licensee may |
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65 | * make. |
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66 | * |
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67 | * 3.3. Redistribution of Executable. Redistribution in executable form of any |
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68 | * substantial portion of the Covered Code or modification must reproduce the |
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69 | * above Copyright Notice, and the following Disclaimer and Export Compliance |
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70 | * provision in the documentation and/or other materials provided with the |
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71 | * distribution. |
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72 | * |
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73 | * 3.4. Intel retains all right, title, and interest in and to the Original |
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74 | * Intel Code. |
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75 | * |
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76 | * 3.5. Neither the name Intel nor any other trademark owned or controlled by |
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77 | * Intel shall be used in advertising or otherwise to promote the sale, use or |
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78 | * other dealings in products derived from or relating to the Covered Code |
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79 | * without prior written authorization from Intel. |
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80 | * |
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81 | * 4. Disclaimer and Export Compliance |
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82 | * |
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83 | * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED |
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84 | * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE |
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85 | * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, |
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86 | * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY |
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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 __NSUTILS_C__ |
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118 | |||
119 | #include "acpi.h" |
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120 | #include "accommon.h" |
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121 | #include "acnamesp.h" |
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122 | #include "amlcode.h" |
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123 | |||
124 | #define _COMPONENT ACPI_NAMESPACE |
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125 | ACPI_MODULE_NAME ("nsutils") |
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126 | |||
127 | /* Local prototypes */ |
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128 | |||
129 | static BOOLEAN |
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130 | AcpiNsValidPathSeparator ( |
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131 | char Sep); |
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132 | |||
133 | #ifdef ACPI_OBSOLETE_FUNCTIONS |
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134 | ACPI_NAME |
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135 | AcpiNsFindParentName ( |
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136 | ACPI_NAMESPACE_NODE *NodeToSearch); |
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137 | #endif |
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138 | |||
139 | |||
140 | /******************************************************************************* |
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141 | * |
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142 | * FUNCTION: AcpiNsPrintNodePathname |
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143 | * |
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144 | * PARAMETERS: Node - Object |
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145 | * Message - Prefix message |
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146 | * |
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147 | * DESCRIPTION: Print an object's full namespace pathname |
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148 | * Manages allocation/freeing of a pathname buffer |
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149 | * |
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150 | ******************************************************************************/ |
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151 | |||
152 | void |
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153 | AcpiNsPrintNodePathname ( |
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154 | ACPI_NAMESPACE_NODE *Node, |
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155 | const char *Message) |
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156 | { |
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157 | ACPI_BUFFER Buffer; |
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158 | ACPI_STATUS Status; |
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159 | |||
160 | |||
161 | if (!Node) |
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162 | { |
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163 | AcpiOsPrintf ("[NULL NAME]"); |
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164 | return; |
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165 | } |
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166 | |||
167 | /* Convert handle to full pathname and print it (with supplied message) */ |
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168 | |||
169 | Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; |
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170 | |||
171 | Status = AcpiNsHandleToPathname (Node, &Buffer); |
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172 | if (ACPI_SUCCESS (Status)) |
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173 | { |
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174 | if (Message) |
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175 | { |
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176 | AcpiOsPrintf ("%s ", Message); |
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177 | } |
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178 | |||
179 | AcpiOsPrintf ("[%s] (Node %p)", (char *) Buffer.Pointer, Node); |
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180 | ACPI_FREE (Buffer.Pointer); |
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181 | } |
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182 | } |
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183 | |||
184 | |||
185 | /******************************************************************************* |
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186 | * |
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187 | * FUNCTION: AcpiNsValidRootPrefix |
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188 | * |
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189 | * PARAMETERS: Prefix - Character to be checked |
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190 | * |
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191 | * RETURN: TRUE if a valid prefix |
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192 | * |
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193 | * DESCRIPTION: Check if a character is a valid ACPI Root prefix |
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194 | * |
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195 | ******************************************************************************/ |
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196 | |||
197 | BOOLEAN |
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198 | AcpiNsValidRootPrefix ( |
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199 | char Prefix) |
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200 | { |
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201 | |||
202 | return ((BOOLEAN) (Prefix == '\\')); |
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203 | } |
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204 | |||
205 | |||
206 | /******************************************************************************* |
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207 | * |
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208 | * FUNCTION: AcpiNsValidPathSeparator |
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209 | * |
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210 | * PARAMETERS: Sep - Character to be checked |
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211 | * |
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212 | * RETURN: TRUE if a valid path separator |
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213 | * |
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214 | * DESCRIPTION: Check if a character is a valid ACPI path separator |
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215 | * |
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216 | ******************************************************************************/ |
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217 | |||
218 | static BOOLEAN |
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219 | AcpiNsValidPathSeparator ( |
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220 | char Sep) |
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221 | { |
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222 | |||
223 | return ((BOOLEAN) (Sep == '.')); |
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224 | } |
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225 | |||
226 | |||
227 | /******************************************************************************* |
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228 | * |
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229 | * FUNCTION: AcpiNsGetType |
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230 | * |
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231 | * PARAMETERS: Node - Parent Node to be examined |
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232 | * |
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233 | * RETURN: Type field from Node whose handle is passed |
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234 | * |
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235 | * DESCRIPTION: Return the type of a Namespace node |
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236 | * |
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237 | ******************************************************************************/ |
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238 | |||
239 | ACPI_OBJECT_TYPE |
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240 | AcpiNsGetType ( |
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241 | ACPI_NAMESPACE_NODE *Node) |
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242 | { |
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243 | ACPI_FUNCTION_TRACE (NsGetType); |
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244 | |||
245 | |||
246 | if (!Node) |
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247 | { |
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248 | ACPI_WARNING ((AE_INFO, "Null Node parameter")); |
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249 | return_UINT32 (ACPI_TYPE_ANY); |
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250 | } |
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251 | |||
252 | return_UINT32 ((ACPI_OBJECT_TYPE) Node->Type); |
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253 | } |
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254 | |||
255 | |||
256 | /******************************************************************************* |
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257 | * |
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258 | * FUNCTION: AcpiNsLocal |
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259 | * |
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260 | * PARAMETERS: Type - A namespace object type |
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261 | * |
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262 | * RETURN: LOCAL if names must be found locally in objects of the |
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263 | * passed type, 0 if enclosing scopes should be searched |
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264 | * |
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265 | * DESCRIPTION: Returns scope rule for the given object type. |
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266 | * |
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267 | ******************************************************************************/ |
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268 | |||
269 | UINT32 |
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270 | AcpiNsLocal ( |
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271 | ACPI_OBJECT_TYPE Type) |
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272 | { |
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273 | ACPI_FUNCTION_TRACE (NsLocal); |
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274 | |||
275 | |||
276 | if (!AcpiUtValidObjectType (Type)) |
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277 | { |
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278 | /* Type code out of range */ |
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279 | |||
280 | ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X", Type)); |
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281 | return_UINT32 (ACPI_NS_NORMAL); |
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282 | } |
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283 | |||
284 | return_UINT32 ((UINT32) AcpiGbl_NsProperties[Type] & ACPI_NS_LOCAL); |
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285 | } |
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286 | |||
287 | |||
288 | /******************************************************************************* |
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289 | * |
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290 | * FUNCTION: AcpiNsGetInternalNameLength |
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291 | * |
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292 | * PARAMETERS: Info - Info struct initialized with the |
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293 | * external name pointer. |
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294 | * |
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295 | * RETURN: None |
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296 | * |
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297 | * DESCRIPTION: Calculate the length of the internal (AML) namestring |
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298 | * corresponding to the external (ASL) namestring. |
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299 | * |
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300 | ******************************************************************************/ |
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301 | |||
302 | void |
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303 | AcpiNsGetInternalNameLength ( |
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304 | ACPI_NAMESTRING_INFO *Info) |
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305 | { |
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306 | const char *NextExternalChar; |
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307 | UINT32 i; |
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308 | |||
309 | |||
310 | ACPI_FUNCTION_ENTRY (); |
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311 | |||
312 | |||
313 | NextExternalChar = Info->ExternalName; |
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314 | Info->NumCarats = 0; |
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315 | Info->NumSegments = 0; |
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316 | Info->FullyQualified = FALSE; |
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317 | |||
318 | /* |
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319 | * For the internal name, the required length is 4 bytes per segment, plus |
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320 | * 1 each for RootPrefix, MultiNamePrefixOp, segment count, trailing null |
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321 | * (which is not really needed, but no there's harm in putting it there) |
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322 | * |
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323 | * strlen() + 1 covers the first NameSeg, which has no path separator |
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324 | */ |
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325 | if (AcpiNsValidRootPrefix (*NextExternalChar)) |
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326 | { |
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327 | Info->FullyQualified = TRUE; |
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328 | NextExternalChar++; |
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329 | |||
330 | /* Skip redundant RootPrefix, like \\_SB.PCI0.SBRG.EC0 */ |
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331 | |||
332 | while (AcpiNsValidRootPrefix (*NextExternalChar)) |
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333 | { |
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334 | NextExternalChar++; |
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335 | } |
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336 | } |
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337 | else |
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338 | { |
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339 | /* Handle Carat prefixes */ |
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340 | |||
341 | while (*NextExternalChar == '^') |
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342 | { |
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343 | Info->NumCarats++; |
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344 | NextExternalChar++; |
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345 | } |
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346 | } |
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347 | |||
348 | /* |
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349 | * Determine the number of ACPI name "segments" by counting the number of |
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350 | * path separators within the string. Start with one segment since the |
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351 | * segment count is [(# separators) + 1], and zero separators is ok. |
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352 | */ |
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353 | if (*NextExternalChar) |
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354 | { |
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355 | Info->NumSegments = 1; |
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356 | for (i = 0; NextExternalChar[i]; i++) |
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357 | { |
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358 | if (AcpiNsValidPathSeparator (NextExternalChar[i])) |
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359 | { |
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360 | Info->NumSegments++; |
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361 | } |
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362 | } |
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363 | } |
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364 | |||
365 | Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) + |
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366 | 4 + Info->NumCarats; |
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367 | |||
368 | Info->NextExternalChar = NextExternalChar; |
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369 | } |
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370 | |||
371 | |||
372 | /******************************************************************************* |
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373 | * |
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374 | * FUNCTION: AcpiNsBuildInternalName |
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375 | * |
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376 | * PARAMETERS: Info - Info struct fully initialized |
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377 | * |
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378 | * RETURN: Status |
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379 | * |
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380 | * DESCRIPTION: Construct the internal (AML) namestring |
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381 | * corresponding to the external (ASL) namestring. |
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382 | * |
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383 | ******************************************************************************/ |
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384 | |||
385 | ACPI_STATUS |
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386 | AcpiNsBuildInternalName ( |
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387 | ACPI_NAMESTRING_INFO *Info) |
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388 | { |
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389 | UINT32 NumSegments = Info->NumSegments; |
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390 | char *InternalName = Info->InternalName; |
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391 | const char *ExternalName = Info->NextExternalChar; |
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392 | char *Result = NULL; |
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393 | UINT32 i; |
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394 | |||
395 | |||
396 | ACPI_FUNCTION_TRACE (NsBuildInternalName); |
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397 | |||
398 | |||
399 | /* Setup the correct prefixes, counts, and pointers */ |
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400 | |||
401 | if (Info->FullyQualified) |
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402 | { |
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403 | InternalName[0] = '\\'; |
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404 | |||
405 | if (NumSegments <= 1) |
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406 | { |
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407 | Result = &InternalName[1]; |
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408 | } |
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409 | else if (NumSegments == 2) |
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410 | { |
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411 | InternalName[1] = AML_DUAL_NAME_PREFIX; |
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412 | Result = &InternalName[2]; |
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413 | } |
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414 | else |
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415 | { |
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416 | InternalName[1] = AML_MULTI_NAME_PREFIX_OP; |
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417 | InternalName[2] = (char) NumSegments; |
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418 | Result = &InternalName[3]; |
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419 | } |
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420 | } |
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421 | else |
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422 | { |
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423 | /* |
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424 | * Not fully qualified. |
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425 | * Handle Carats first, then append the name segments |
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426 | */ |
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427 | i = 0; |
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428 | if (Info->NumCarats) |
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429 | { |
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430 | for (i = 0; i < Info->NumCarats; i++) |
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431 | { |
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432 | InternalName[i] = '^'; |
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433 | } |
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434 | } |
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435 | |||
436 | if (NumSegments <= 1) |
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437 | { |
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438 | Result = &InternalName[i]; |
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439 | } |
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440 | else if (NumSegments == 2) |
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441 | { |
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442 | InternalName[i] = AML_DUAL_NAME_PREFIX; |
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443 | Result = &InternalName[(ACPI_SIZE) i+1]; |
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444 | } |
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445 | else |
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446 | { |
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447 | InternalName[i] = AML_MULTI_NAME_PREFIX_OP; |
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448 | InternalName[(ACPI_SIZE) i+1] = (char) NumSegments; |
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449 | Result = &InternalName[(ACPI_SIZE) i+2]; |
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450 | } |
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451 | } |
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452 | |||
453 | /* Build the name (minus path separators) */ |
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454 | |||
455 | for (; NumSegments; NumSegments--) |
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456 | { |
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457 | for (i = 0; i < ACPI_NAME_SIZE; i++) |
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458 | { |
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459 | if (AcpiNsValidPathSeparator (*ExternalName) || |
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460 | (*ExternalName == 0)) |
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461 | { |
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462 | /* Pad the segment with underscore(s) if segment is short */ |
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463 | |||
464 | Result[i] = '_'; |
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465 | } |
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466 | else |
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467 | { |
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468 | /* Convert the character to uppercase and save it */ |
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469 | |||
470 | Result[i] = (char) ACPI_TOUPPER ((int) *ExternalName); |
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471 | ExternalName++; |
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472 | } |
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473 | } |
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474 | |||
475 | /* Now we must have a path separator, or the pathname is bad */ |
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476 | |||
477 | if (!AcpiNsValidPathSeparator (*ExternalName) && |
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478 | (*ExternalName != 0)) |
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479 | { |
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480 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
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481 | } |
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482 | |||
483 | /* Move on the next segment */ |
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484 | |||
485 | ExternalName++; |
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486 | Result += ACPI_NAME_SIZE; |
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487 | } |
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488 | |||
489 | /* Terminate the string */ |
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490 | |||
491 | *Result = 0; |
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492 | |||
493 | if (Info->FullyQualified) |
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494 | { |
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495 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (abs) \"\\%s\"\n", |
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496 | InternalName, InternalName)); |
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497 | } |
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498 | else |
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499 | { |
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500 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n", |
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501 | InternalName, InternalName)); |
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502 | } |
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503 | |||
504 | return_ACPI_STATUS (AE_OK); |
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505 | } |
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506 | |||
507 | |||
508 | /******************************************************************************* |
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509 | * |
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510 | * FUNCTION: AcpiNsInternalizeName |
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511 | * |
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512 | * PARAMETERS: *ExternalName - External representation of name |
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513 | * **Converted Name - Where to return the resulting |
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514 | * internal represention of the name |
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515 | * |
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516 | * RETURN: Status |
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517 | * |
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518 | * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") |
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519 | * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) |
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520 | * |
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521 | *******************************************************************************/ |
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522 | |||
523 | ACPI_STATUS |
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524 | AcpiNsInternalizeName ( |
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525 | const char *ExternalName, |
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526 | char **ConvertedName) |
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527 | { |
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528 | char *InternalName; |
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529 | ACPI_NAMESTRING_INFO Info; |
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530 | ACPI_STATUS Status; |
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531 | |||
532 | |||
533 | ACPI_FUNCTION_TRACE (NsInternalizeName); |
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534 | |||
535 | |||
536 | if ((!ExternalName) || |
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537 | (*ExternalName == 0) || |
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538 | (!ConvertedName)) |
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539 | { |
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540 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
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541 | } |
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542 | |||
543 | /* Get the length of the new internal name */ |
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544 | |||
545 | Info.ExternalName = ExternalName; |
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546 | AcpiNsGetInternalNameLength (&Info); |
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547 | |||
548 | /* We need a segment to store the internal name */ |
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549 | |||
550 | InternalName = ACPI_ALLOCATE_ZEROED (Info.Length); |
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551 | if (!InternalName) |
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552 | { |
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553 | return_ACPI_STATUS (AE_NO_MEMORY); |
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554 | } |
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555 | |||
556 | /* Build the name */ |
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557 | |||
558 | Info.InternalName = InternalName; |
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559 | Status = AcpiNsBuildInternalName (&Info); |
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560 | if (ACPI_FAILURE (Status)) |
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561 | { |
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562 | ACPI_FREE (InternalName); |
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563 | return_ACPI_STATUS (Status); |
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564 | } |
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565 | |||
566 | *ConvertedName = InternalName; |
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567 | return_ACPI_STATUS (AE_OK); |
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568 | } |
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569 | |||
570 | |||
571 | /******************************************************************************* |
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572 | * |
||
573 | * FUNCTION: AcpiNsExternalizeName |
||
574 | * |
||
575 | * PARAMETERS: InternalNameLength - Lenth of the internal name below |
||
576 | * InternalName - Internal representation of name |
||
577 | * ConvertedNameLength - Where the length is returned |
||
578 | * ConvertedName - Where the resulting external name |
||
579 | * is returned |
||
580 | * |
||
581 | * RETURN: Status |
||
582 | * |
||
583 | * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) |
||
584 | * to its external (printable) form (e.g. "\_PR_.CPU0") |
||
585 | * |
||
586 | ******************************************************************************/ |
||
587 | |||
588 | ACPI_STATUS |
||
589 | AcpiNsExternalizeName ( |
||
590 | UINT32 InternalNameLength, |
||
591 | const char *InternalName, |
||
592 | UINT32 *ConvertedNameLength, |
||
593 | char **ConvertedName) |
||
594 | { |
||
595 | UINT32 NamesIndex = 0; |
||
596 | UINT32 NumSegments = 0; |
||
597 | UINT32 RequiredLength; |
||
598 | UINT32 PrefixLength = 0; |
||
599 | UINT32 i = 0; |
||
600 | UINT32 j = 0; |
||
601 | |||
602 | |||
603 | ACPI_FUNCTION_TRACE (NsExternalizeName); |
||
604 | |||
605 | |||
606 | if (!InternalNameLength || |
||
607 | !InternalName || |
||
608 | !ConvertedName) |
||
609 | { |
||
610 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
||
611 | } |
||
612 | |||
613 | /* Check for a prefix (one '\' | one or more '^') */ |
||
614 | |||
615 | switch (InternalName[0]) |
||
616 | { |
||
617 | case '\\': |
||
618 | PrefixLength = 1; |
||
619 | break; |
||
620 | |||
621 | case '^': |
||
622 | for (i = 0; i < InternalNameLength; i++) |
||
623 | { |
||
624 | if (InternalName[i] == '^') |
||
625 | { |
||
626 | PrefixLength = i + 1; |
||
627 | } |
||
628 | else |
||
629 | { |
||
630 | break; |
||
631 | } |
||
632 | } |
||
633 | |||
634 | if (i == InternalNameLength) |
||
635 | { |
||
636 | PrefixLength = i; |
||
637 | } |
||
638 | |||
639 | break; |
||
640 | |||
641 | default: |
||
642 | break; |
||
643 | } |
||
644 | |||
645 | /* |
||
646 | * Check for object names. Note that there could be 0-255 of these |
||
647 | * 4-byte elements. |
||
648 | */ |
||
649 | if (PrefixLength < InternalNameLength) |
||
650 | { |
||
651 | switch (InternalName[PrefixLength]) |
||
652 | { |
||
653 | case AML_MULTI_NAME_PREFIX_OP: |
||
654 | |||
655 | /* |
||
656 | |||
657 | NamesIndex = PrefixLength + 2; |
||
658 | NumSegments = (UINT8) |
||
659 | InternalName[(ACPI_SIZE) PrefixLength + 1]; |
||
660 | break; |
||
661 | |||
662 | case AML_DUAL_NAME_PREFIX: |
||
663 | |||
664 | /* Two 4-byte names */ |
||
665 | |||
666 | NamesIndex = PrefixLength + 1; |
||
667 | NumSegments = 2; |
||
668 | break; |
||
669 | |||
670 | case 0: |
||
671 | |||
672 | /* NullName */ |
||
673 | |||
674 | NamesIndex = 0; |
||
675 | NumSegments = 0; |
||
676 | break; |
||
677 | |||
678 | default: |
||
679 | |||
680 | /* one 4-byte name */ |
||
681 | |||
682 | NamesIndex = PrefixLength; |
||
683 | NumSegments = 1; |
||
684 | break; |
||
685 | } |
||
686 | } |
||
687 | |||
688 | /* |
||
689 | * Calculate the length of ConvertedName, which equals the length |
||
690 | * of the prefix, length of all object names, length of any required |
||
691 | * punctuation ('.') between object names, plus the NULL terminator. |
||
692 | */ |
||
693 | RequiredLength = PrefixLength + (4 * NumSegments) + |
||
694 | ((NumSegments > 0) ? (NumSegments - 1) : 0) + 1; |
||
695 | |||
696 | /* |
||
697 | * Check to see if we're still in bounds. If not, there's a problem |
||
698 | * with InternalName (invalid format). |
||
699 | */ |
||
700 | if (RequiredLength > InternalNameLength) |
||
701 | { |
||
702 | ACPI_ERROR ((AE_INFO, "Invalid internal name")); |
||
703 | return_ACPI_STATUS (AE_BAD_PATHNAME); |
||
704 | } |
||
705 | |||
706 | /* Build the ConvertedName */ |
||
707 | |||
708 | *ConvertedName = ACPI_ALLOCATE_ZEROED (RequiredLength); |
||
709 | if (!(*ConvertedName)) |
||
710 | { |
||
711 | return_ACPI_STATUS (AE_NO_MEMORY); |
||
712 | } |
||
713 | |||
714 | j = 0; |
||
715 | |||
716 | for (i = 0; i < PrefixLength; i++) |
||
717 | { |
||
718 | (*ConvertedName)[j++] = InternalName[i]; |
||
719 | } |
||
720 | |||
721 | if (NumSegments > 0) |
||
722 | { |
||
723 | for (i = 0; i < NumSegments; i++) |
||
724 | { |
||
725 | if (i > 0) |
||
726 | { |
||
727 | (*ConvertedName)[j++] = '.'; |
||
728 | } |
||
729 | |||
730 | (*ConvertedName)[j++] = InternalName[NamesIndex++]; |
||
731 | (*ConvertedName)[j++] = InternalName[NamesIndex++]; |
||
732 | (*ConvertedName)[j++] = InternalName[NamesIndex++]; |
||
733 | (*ConvertedName)[j++] = InternalName[NamesIndex++]; |
||
734 | } |
||
735 | } |
||
736 | |||
737 | if (ConvertedNameLength) |
||
738 | { |
||
739 | *ConvertedNameLength = (UINT32) RequiredLength; |
||
740 | } |
||
741 | |||
742 | return_ACPI_STATUS (AE_OK); |
||
743 | } |
||
744 | |||
745 | |||
746 | /******************************************************************************* |
||
747 | * |
||
748 | * FUNCTION: AcpiNsValidateHandle |
||
749 | * |
||
750 | * PARAMETERS: Handle - Handle to be validated and typecast to a |
||
751 | * namespace node. |
||
752 | * |
||
753 | * RETURN: A pointer to a namespace node |
||
754 | * |
||
755 | * DESCRIPTION: Convert a namespace handle to a namespace node. Handles special |
||
756 | * cases for the root node. |
||
757 | * |
||
758 | * NOTE: Real integer handles would allow for more verification |
||
759 | * and keep all pointers within this subsystem - however this introduces |
||
760 | * more overhead and has not been necessary to this point. Drivers |
||
761 | * holding handles are typically notified before a node becomes invalid |
||
762 | * due to a table unload. |
||
763 | * |
||
764 | ******************************************************************************/ |
||
765 | |||
766 | ACPI_NAMESPACE_NODE * |
||
767 | AcpiNsValidateHandle ( |
||
768 | ACPI_HANDLE Handle) |
||
769 | { |
||
770 | |||
771 | ACPI_FUNCTION_ENTRY (); |
||
772 | |||
773 | |||
774 | /* Parameter validation */ |
||
775 | |||
776 | if ((!Handle) || (Handle == ACPI_ROOT_OBJECT)) |
||
777 | { |
||
778 | return (AcpiGbl_RootNode); |
||
779 | } |
||
780 | |||
781 | /* We can at least attempt to verify the handle */ |
||
782 | |||
783 | if (ACPI_GET_DESCRIPTOR_TYPE (Handle) != ACPI_DESC_TYPE_NAMED) |
||
784 | { |
||
785 | return (NULL); |
||
786 | } |
||
787 | |||
788 | return (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle)); |
||
789 | } |
||
790 | |||
791 | |||
792 | /******************************************************************************* |
||
793 | * |
||
794 | * FUNCTION: AcpiNsTerminate |
||
795 | * |
||
796 | * PARAMETERS: none |
||
797 | * |
||
798 | * RETURN: none |
||
799 | * |
||
800 | * DESCRIPTION: free memory allocated for namespace and ACPI table storage. |
||
801 | * |
||
802 | ******************************************************************************/ |
||
803 | |||
804 | void |
||
805 | AcpiNsTerminate ( |
||
806 | void) |
||
807 | { |
||
808 | ACPI_OPERAND_OBJECT *ObjDesc; |
||
809 | |||
810 | |||
811 | ACPI_FUNCTION_TRACE (NsTerminate); |
||
812 | |||
813 | |||
814 | /* |
||
815 | * 1) Free the entire namespace -- all nodes and objects |
||
816 | * |
||
817 | * Delete all object descriptors attached to namepsace nodes |
||
818 | */ |
||
819 | AcpiNsDeleteNamespaceSubtree (AcpiGbl_RootNode); |
||
820 | |||
821 | /* Detach any objects attached to the root */ |
||
822 | |||
823 | ObjDesc = AcpiNsGetAttachedObject (AcpiGbl_RootNode); |
||
824 | if (ObjDesc) |
||
825 | { |
||
826 | AcpiNsDetachObject (AcpiGbl_RootNode); |
||
827 | } |
||
828 | |||
829 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n")); |
||
830 | return_VOID; |
||
831 | } |
||
832 | |||
833 | |||
834 | /******************************************************************************* |
||
835 | * |
||
836 | * FUNCTION: AcpiNsOpensScope |
||
837 | * |
||
838 | * PARAMETERS: Type - A valid namespace type |
||
839 | * |
||
840 | * RETURN: NEWSCOPE if the passed type "opens a name scope" according |
||
841 | * to the ACPI specification, else 0 |
||
842 | * |
||
843 | ******************************************************************************/ |
||
844 | |||
845 | UINT32 |
||
846 | AcpiNsOpensScope ( |
||
847 | ACPI_OBJECT_TYPE Type) |
||
848 | { |
||
849 | ACPI_FUNCTION_TRACE_STR (NsOpensScope, AcpiUtGetTypeName (Type)); |
||
850 | |||
851 | |||
852 | if (!AcpiUtValidObjectType (Type)) |
||
853 | { |
||
854 | /* type code out of range */ |
||
855 | |||
856 | ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X", Type)); |
||
857 | return_UINT32 (ACPI_NS_NORMAL); |
||
858 | } |
||
859 | |||
860 | return_UINT32 (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE); |
||
861 | } |
||
862 | |||
863 | |||
864 | /******************************************************************************* |
||
865 | * |
||
866 | * FUNCTION: AcpiNsGetNode |
||
867 | * |
||
868 | * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The |
||
869 | * \ (backslash) and ^ (carat) prefixes, and the |
||
870 | * . (period) to separate segments are supported. |
||
871 | * PrefixNode - Root of subtree to be searched, or NS_ALL for the |
||
872 | * root of the name space. If Name is fully |
||
873 | * qualified (first INT8 is '\'), the passed value |
||
874 | * of Scope will not be accessed. |
||
875 | * Flags - Used to indicate whether to perform upsearch or |
||
876 | * not. |
||
877 | * ReturnNode - Where the Node is returned |
||
878 | * |
||
879 | * DESCRIPTION: Look up a name relative to a given scope and return the |
||
880 | * corresponding Node. NOTE: Scope can be null. |
||
881 | * |
||
882 | * MUTEX: Locks namespace |
||
883 | * |
||
884 | ******************************************************************************/ |
||
885 | |||
886 | ACPI_STATUS |
||
887 | AcpiNsGetNode ( |
||
888 | ACPI_NAMESPACE_NODE *PrefixNode, |
||
889 | const char *Pathname, |
||
890 | UINT32 Flags, |
||
891 | ACPI_NAMESPACE_NODE **ReturnNode) |
||
892 | { |
||
893 | ACPI_GENERIC_STATE ScopeInfo; |
||
894 | ACPI_STATUS Status; |
||
895 | char *InternalPath; |
||
896 | |||
897 | |||
898 | ACPI_FUNCTION_TRACE_PTR (NsGetNode, ACPI_CAST_PTR (char, Pathname)); |
||
899 | |||
900 | |||
901 | if (!Pathname) |
||
902 | { |
||
903 | *ReturnNode = PrefixNode; |
||
904 | if (!PrefixNode) |
||
905 | { |
||
906 | *ReturnNode = AcpiGbl_RootNode; |
||
907 | } |
||
908 | return_ACPI_STATUS (AE_OK); |
||
909 | } |
||
910 | |||
911 | /* Convert path to internal representation */ |
||
912 | |||
913 | Status = AcpiNsInternalizeName (Pathname, &InternalPath); |
||
914 | if (ACPI_FAILURE (Status)) |
||
915 | { |
||
916 | return_ACPI_STATUS (Status); |
||
917 | } |
||
918 | |||
919 | /* Must lock namespace during lookup */ |
||
920 | |||
921 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
||
922 | if (ACPI_FAILURE (Status)) |
||
923 | { |
||
924 | goto Cleanup; |
||
925 | } |
||
926 | |||
927 | /* Setup lookup scope (search starting point) */ |
||
928 | |||
929 | ScopeInfo.Scope.Node = PrefixNode; |
||
930 | |||
931 | /* Lookup the name in the namespace */ |
||
932 | |||
933 | Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY, |
||
934 | ACPI_IMODE_EXECUTE, (Flags | ACPI_NS_DONT_OPEN_SCOPE), |
||
935 | NULL, ReturnNode); |
||
936 | if (ACPI_FAILURE (Status)) |
||
937 | { |
||
938 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s, %s\n", |
||
939 | Pathname, AcpiFormatException (Status))); |
||
940 | } |
||
941 | |||
942 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
||
943 | |||
944 | Cleanup: |
||
945 | ACPI_FREE (InternalPath); |
||
946 | return_ACPI_STATUS (Status); |
||
947 | }>>>>>=>>=> |