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1498 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: nsxfname - Public interfaces to the ACPI subsystem |
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4 | * ACPI Namespace oriented interfaces |
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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 __NSXFNAME_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 "acparser.h" |
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123 | #include "amlcode.h" |
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124 | |||
125 | |||
126 | #define _COMPONENT ACPI_NAMESPACE |
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127 | ACPI_MODULE_NAME ("nsxfname") |
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128 | |||
129 | /* Local prototypes */ |
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130 | |||
131 | static char * |
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132 | AcpiNsCopyDeviceId ( |
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133 | ACPI_DEVICE_ID *Dest, |
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134 | ACPI_DEVICE_ID *Source, |
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135 | char *StringArea); |
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136 | |||
137 | |||
138 | /****************************************************************************** |
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139 | * |
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140 | * FUNCTION: AcpiGetHandle |
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141 | * |
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142 | * PARAMETERS: Parent - Object to search under (search scope). |
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143 | * Pathname - Pointer to an asciiz string containing the |
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144 | * name |
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145 | * RetHandle - Where the return handle is returned |
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146 | * |
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147 | * RETURN: Status |
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148 | * |
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149 | * DESCRIPTION: This routine will search for a caller specified name in the |
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150 | * name space. The caller can restrict the search region by |
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151 | * specifying a non NULL parent. The parent value is itself a |
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152 | * namespace handle. |
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153 | * |
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154 | ******************************************************************************/ |
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155 | |||
156 | ACPI_STATUS |
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157 | AcpiGetHandle ( |
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158 | ACPI_HANDLE Parent, |
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159 | ACPI_STRING Pathname, |
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160 | ACPI_HANDLE *RetHandle) |
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161 | { |
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162 | ACPI_STATUS Status; |
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163 | ACPI_NAMESPACE_NODE *Node = NULL; |
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164 | ACPI_NAMESPACE_NODE *PrefixNode = NULL; |
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165 | |||
166 | |||
167 | ACPI_FUNCTION_ENTRY (); |
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168 | |||
169 | |||
170 | /* Parameter Validation */ |
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171 | |||
172 | if (!RetHandle || !Pathname) |
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173 | { |
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174 | return (AE_BAD_PARAMETER); |
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175 | } |
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176 | |||
177 | /* Convert a parent handle to a prefix node */ |
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178 | |||
179 | if (Parent) |
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180 | { |
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181 | PrefixNode = AcpiNsValidateHandle (Parent); |
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182 | if (!PrefixNode) |
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183 | { |
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184 | return (AE_BAD_PARAMETER); |
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185 | } |
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186 | } |
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187 | |||
188 | /* |
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189 | * Valid cases are: |
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190 | * 1) Fully qualified pathname |
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191 | * 2) Parent + Relative pathname |
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192 | * |
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193 | * Error for |
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194 | */ |
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195 | if (AcpiNsValidRootPrefix (Pathname[0])) |
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196 | { |
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197 | /* Pathname is fully qualified (starts with '\') */ |
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198 | |||
199 | /* Special case for root-only, since we can't search for it */ |
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200 | |||
201 | if (!ACPI_STRCMP (Pathname, ACPI_NS_ROOT_PATH)) |
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202 | { |
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203 | *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, AcpiGbl_RootNode); |
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204 | return (AE_OK); |
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205 | } |
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206 | } |
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207 | else if (!PrefixNode) |
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208 | { |
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209 | /* Relative path with null prefix is disallowed */ |
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210 | |||
211 | return (AE_BAD_PARAMETER); |
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212 | } |
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213 | |||
214 | /* Find the Node and convert to a handle */ |
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215 | |||
216 | Status = AcpiNsGetNode (PrefixNode, Pathname, ACPI_NS_NO_UPSEARCH, &Node); |
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217 | if (ACPI_SUCCESS (Status)) |
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218 | { |
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219 | *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, Node); |
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220 | } |
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221 | |||
222 | return (Status); |
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223 | } |
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224 | |||
225 | ACPI_EXPORT_SYMBOL (AcpiGetHandle) |
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226 | |||
227 | |||
228 | /****************************************************************************** |
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229 | * |
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230 | * FUNCTION: AcpiGetName |
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231 | * |
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232 | * PARAMETERS: Handle - Handle to be converted to a pathname |
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233 | * NameType - Full pathname or single segment |
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234 | * Buffer - Buffer for returned path |
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235 | * |
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236 | * RETURN: Pointer to a string containing the fully qualified Name. |
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237 | * |
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238 | * DESCRIPTION: This routine returns the fully qualified name associated with |
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239 | * the Handle parameter. This and the AcpiPathnameToHandle are |
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240 | * complementary functions. |
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241 | * |
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242 | ******************************************************************************/ |
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243 | |||
244 | ACPI_STATUS |
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245 | AcpiGetName ( |
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246 | ACPI_HANDLE Handle, |
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247 | UINT32 NameType, |
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248 | ACPI_BUFFER *Buffer) |
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249 | { |
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250 | ACPI_STATUS Status; |
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251 | ACPI_NAMESPACE_NODE *Node; |
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252 | |||
253 | |||
254 | /* Parameter validation */ |
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255 | |||
256 | if (NameType > ACPI_NAME_TYPE_MAX) |
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257 | { |
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258 | return (AE_BAD_PARAMETER); |
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259 | } |
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260 | |||
261 | Status = AcpiUtValidateBuffer (Buffer); |
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262 | if (ACPI_FAILURE (Status)) |
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263 | { |
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264 | return (Status); |
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265 | } |
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266 | |||
267 | if (NameType == ACPI_FULL_PATHNAME) |
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268 | { |
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269 | /* Get the full pathname (From the namespace root) */ |
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270 | |||
271 | Status = AcpiNsHandleToPathname (Handle, Buffer); |
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272 | return (Status); |
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273 | } |
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274 | |||
275 | /* |
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276 | * Wants the single segment ACPI name. |
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277 | * Validate handle and convert to a namespace Node |
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278 | */ |
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279 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
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280 | if (ACPI_FAILURE (Status)) |
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281 | { |
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282 | return (Status); |
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283 | } |
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284 | |||
285 | Node = AcpiNsValidateHandle (Handle); |
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286 | if (!Node) |
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287 | { |
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288 | Status = AE_BAD_PARAMETER; |
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289 | goto UnlockAndExit; |
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290 | } |
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291 | |||
292 | /* Validate/Allocate/Clear caller buffer */ |
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293 | |||
294 | Status = AcpiUtInitializeBuffer (Buffer, ACPI_PATH_SEGMENT_LENGTH); |
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295 | if (ACPI_FAILURE (Status)) |
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296 | { |
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297 | goto UnlockAndExit; |
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298 | } |
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299 | |||
300 | /* Just copy the ACPI name from the Node and zero terminate it */ |
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301 | |||
302 | ACPI_STRNCPY (Buffer->Pointer, AcpiUtGetNodeName (Node), |
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303 | ACPI_NAME_SIZE); |
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304 | ((char *) Buffer->Pointer) [ACPI_NAME_SIZE] = 0; |
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305 | Status = AE_OK; |
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306 | |||
307 | |||
308 | UnlockAndExit: |
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309 | |||
310 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
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311 | return (Status); |
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312 | } |
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313 | |||
314 | ACPI_EXPORT_SYMBOL (AcpiGetName) |
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315 | |||
316 | |||
317 | /****************************************************************************** |
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318 | * |
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319 | * FUNCTION: AcpiNsCopyDeviceId |
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320 | * |
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321 | * PARAMETERS: Dest - Pointer to the destination DEVICE_ID |
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322 | * Source - Pointer to the source DEVICE_ID |
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323 | * StringArea - Pointer to where to copy the dest string |
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324 | * |
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325 | * RETURN: Pointer to the next string area |
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326 | * |
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327 | * DESCRIPTION: Copy a single DEVICE_ID, including the string data. |
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328 | * |
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329 | ******************************************************************************/ |
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330 | |||
331 | static char * |
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332 | AcpiNsCopyDeviceId ( |
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333 | ACPI_DEVICE_ID *Dest, |
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334 | ACPI_DEVICE_ID *Source, |
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335 | char *StringArea) |
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336 | { |
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337 | /* Create the destination DEVICE_ID */ |
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338 | |||
339 | Dest->String = StringArea; |
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340 | Dest->Length = Source->Length; |
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341 | |||
342 | /* Copy actual string and return a pointer to the next string area */ |
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343 | |||
344 | ACPI_MEMCPY (StringArea, Source->String, Source->Length); |
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345 | return (StringArea + Source->Length); |
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346 | } |
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347 | |||
348 | |||
349 | /****************************************************************************** |
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350 | * |
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351 | * FUNCTION: AcpiGetObjectInfo |
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352 | * |
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353 | * PARAMETERS: Handle - Object Handle |
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354 | * ReturnBuffer - Where the info is returned |
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355 | * |
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356 | * RETURN: Status |
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357 | * |
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358 | * DESCRIPTION: Returns information about an object as gleaned from the |
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359 | * namespace node and possibly by running several standard |
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360 | * control methods (Such as in the case of a device.) |
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361 | * |
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362 | * For Device and Processor objects, run the Device _HID, _UID, _CID, _STA, |
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363 | * _ADR, _SxW, and _SxD methods. |
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364 | * |
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365 | * Note: Allocates the return buffer, must be freed by the caller. |
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366 | * |
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367 | ******************************************************************************/ |
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368 | |||
369 | ACPI_STATUS |
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370 | AcpiGetObjectInfo ( |
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371 | ACPI_HANDLE Handle, |
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372 | ACPI_DEVICE_INFO **ReturnBuffer) |
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373 | { |
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374 | ACPI_NAMESPACE_NODE *Node; |
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375 | ACPI_DEVICE_INFO *Info; |
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376 | ACPI_DEVICE_ID_LIST *CidList = NULL; |
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377 | ACPI_DEVICE_ID *Hid = NULL; |
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378 | ACPI_DEVICE_ID *Uid = NULL; |
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379 | char *NextIdString; |
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380 | ACPI_OBJECT_TYPE Type; |
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381 | ACPI_NAME Name; |
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382 | UINT8 ParamCount= 0; |
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383 | UINT8 Valid = 0; |
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384 | UINT32 InfoSize; |
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385 | UINT32 i; |
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386 | ACPI_STATUS Status; |
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387 | |||
388 | |||
389 | /* Parameter validation */ |
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390 | |||
391 | if (!Handle || !ReturnBuffer) |
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392 | { |
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393 | return (AE_BAD_PARAMETER); |
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394 | } |
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395 | |||
396 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
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397 | if (ACPI_FAILURE (Status)) |
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398 | { |
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399 | goto Cleanup; |
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400 | } |
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401 | |||
402 | Node = AcpiNsValidateHandle (Handle); |
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403 | if (!Node) |
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404 | { |
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405 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
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406 | return (AE_BAD_PARAMETER); |
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407 | } |
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408 | |||
409 | /* Get the namespace node data while the namespace is locked */ |
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410 | |||
411 | InfoSize = sizeof (ACPI_DEVICE_INFO); |
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412 | Type = Node->Type; |
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413 | Name = Node->Name.Integer; |
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414 | |||
415 | if (Node->Type == ACPI_TYPE_METHOD) |
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416 | { |
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417 | ParamCount = Node->Object->Method.ParamCount; |
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418 | } |
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419 | |||
420 | Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
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421 | if (ACPI_FAILURE (Status)) |
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422 | { |
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423 | return (Status); |
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424 | } |
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425 | |||
426 | if ((Type == ACPI_TYPE_DEVICE) || |
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427 | (Type == ACPI_TYPE_PROCESSOR)) |
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428 | { |
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429 | /* |
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430 | * Get extra info for ACPI Device/Processor objects only: |
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431 | * Run the Device _HID, _UID, and _CID methods. |
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432 | * |
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433 | * Note: none of these methods are required, so they may or may |
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434 | * not be present for this device. The Info->Valid bitfield is used |
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435 | * to indicate which methods were found and run successfully. |
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436 | */ |
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437 | |||
438 | /* Execute the Device._HID method */ |
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439 | |||
440 | Status = AcpiUtExecute_HID (Node, &Hid); |
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441 | if (ACPI_SUCCESS (Status)) |
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442 | { |
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443 | InfoSize += Hid->Length; |
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444 | Valid |= ACPI_VALID_HID; |
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445 | } |
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446 | |||
447 | /* Execute the Device._UID method */ |
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448 | |||
449 | Status = AcpiUtExecute_UID (Node, &Uid); |
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450 | if (ACPI_SUCCESS (Status)) |
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451 | { |
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452 | InfoSize += Uid->Length; |
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453 | Valid |= ACPI_VALID_UID; |
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454 | } |
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455 | |||
456 | /* Execute the Device._CID method */ |
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457 | |||
458 | Status = AcpiUtExecute_CID (Node, &CidList); |
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459 | if (ACPI_SUCCESS (Status)) |
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460 | { |
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461 | /* Add size of CID strings and CID pointer array */ |
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462 | |||
463 | InfoSize += (CidList->ListSize - sizeof (ACPI_DEVICE_ID_LIST)); |
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464 | Valid |= ACPI_VALID_CID; |
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465 | } |
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466 | } |
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467 | |||
468 | /* |
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469 | * Now that we have the variable-length data, we can allocate the |
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470 | * return buffer |
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471 | */ |
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472 | Info = ACPI_ALLOCATE_ZEROED (InfoSize); |
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473 | if (!Info) |
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474 | { |
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475 | Status = AE_NO_MEMORY; |
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476 | goto Cleanup; |
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477 | } |
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478 | |||
479 | /* Get the fixed-length data */ |
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480 | |||
481 | if ((Type == ACPI_TYPE_DEVICE) || |
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482 | (Type == ACPI_TYPE_PROCESSOR)) |
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483 | { |
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484 | /* |
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485 | * Get extra info for ACPI Device/Processor objects only: |
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486 | * Run the _STA, _ADR and, SxW, and _SxD methods. |
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487 | * |
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488 | * Note: none of these methods are required, so they may or may |
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489 | * not be present for this device. The Info->Valid bitfield is used |
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490 | * to indicate which methods were found and run successfully. |
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491 | */ |
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492 | |||
493 | /* Execute the Device._STA method */ |
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494 | |||
495 | Status = AcpiUtExecute_STA (Node, &Info->CurrentStatus); |
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496 | if (ACPI_SUCCESS (Status)) |
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497 | { |
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498 | Valid |= ACPI_VALID_STA; |
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499 | } |
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500 | |||
501 | /* Execute the Device._ADR method */ |
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502 | |||
503 | Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node, |
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504 | &Info->Address); |
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505 | if (ACPI_SUCCESS (Status)) |
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506 | { |
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507 | Valid |= ACPI_VALID_ADR; |
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508 | } |
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509 | |||
510 | /* Execute the Device._SxW methods */ |
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511 | |||
512 | Status = AcpiUtExecutePowerMethods (Node, |
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513 | AcpiGbl_LowestDstateNames, ACPI_NUM_SxW_METHODS, |
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514 | Info->LowestDstates); |
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515 | if (ACPI_SUCCESS (Status)) |
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516 | { |
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517 | Valid |= ACPI_VALID_SXWS; |
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518 | } |
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519 | |||
520 | /* Execute the Device._SxD methods */ |
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521 | |||
522 | Status = AcpiUtExecutePowerMethods (Node, |
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523 | AcpiGbl_HighestDstateNames, ACPI_NUM_SxD_METHODS, |
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524 | Info->HighestDstates); |
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525 | if (ACPI_SUCCESS (Status)) |
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526 | { |
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527 | Valid |= ACPI_VALID_SXDS; |
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528 | } |
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529 | } |
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530 | |||
531 | /* |
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532 | * Create a pointer to the string area of the return buffer. |
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533 | * Point to the end of the base ACPI_DEVICE_INFO structure. |
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534 | */ |
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535 | NextIdString = ACPI_CAST_PTR (char, Info->CompatibleIdList.Ids); |
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536 | if (CidList) |
||
537 | { |
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538 | /* Point past the CID DEVICE_ID array */ |
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539 | |||
540 | NextIdString += ((ACPI_SIZE) CidList->Count * sizeof (ACPI_DEVICE_ID)); |
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541 | } |
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542 | |||
543 | /* |
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544 | * Copy the HID, UID, and CIDs to the return buffer. The variable-length |
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545 | * strings are copied to the reserved area at the end of the buffer. |
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546 | * |
||
547 | * For HID and CID, check if the ID is a PCI Root Bridge. |
||
548 | */ |
||
549 | if (Hid) |
||
550 | { |
||
551 | NextIdString = AcpiNsCopyDeviceId (&Info->HardwareId, |
||
552 | Hid, NextIdString); |
||
553 | |||
554 | if (AcpiUtIsPciRootBridge (Hid->String)) |
||
555 | { |
||
556 | Info->Flags |= ACPI_PCI_ROOT_BRIDGE; |
||
557 | } |
||
558 | } |
||
559 | |||
560 | if (Uid) |
||
561 | { |
||
562 | NextIdString = AcpiNsCopyDeviceId (&Info->UniqueId, |
||
563 | Uid, NextIdString); |
||
564 | } |
||
565 | |||
566 | if (CidList) |
||
567 | { |
||
568 | Info->CompatibleIdList.Count = CidList->Count; |
||
569 | Info->CompatibleIdList.ListSize = CidList->ListSize; |
||
570 | |||
571 | /* Copy each CID */ |
||
572 | |||
573 | for (i = 0; i < CidList->Count; i++) |
||
574 | { |
||
575 | NextIdString = AcpiNsCopyDeviceId (&Info->CompatibleIdList.Ids[i], |
||
576 | &CidList->Ids[i], NextIdString); |
||
577 | |||
578 | if (AcpiUtIsPciRootBridge (CidList->Ids[i].String)) |
||
579 | { |
||
580 | Info->Flags |= ACPI_PCI_ROOT_BRIDGE; |
||
581 | } |
||
582 | } |
||
583 | } |
||
584 | |||
585 | /* Copy the fixed-length data */ |
||
586 | |||
587 | Info->InfoSize = InfoSize; |
||
588 | Info->Type = Type; |
||
589 | Info->Name = Name; |
||
590 | Info->ParamCount = ParamCount; |
||
591 | Info->Valid = Valid; |
||
592 | |||
593 | *ReturnBuffer = Info; |
||
594 | Status = AE_OK; |
||
595 | |||
596 | |||
597 | Cleanup: |
||
598 | if (Hid) |
||
599 | { |
||
600 | ACPI_FREE (Hid); |
||
601 | } |
||
602 | if (Uid) |
||
603 | { |
||
604 | ACPI_FREE (Uid); |
||
605 | } |
||
606 | if (CidList) |
||
607 | { |
||
608 | ACPI_FREE (CidList); |
||
609 | } |
||
610 | return (Status); |
||
611 | } |
||
612 | |||
613 | ACPI_EXPORT_SYMBOL (AcpiGetObjectInfo) |
||
614 | |||
615 | |||
616 | /****************************************************************************** |
||
617 | * |
||
618 | * FUNCTION: AcpiInstallMethod |
||
619 | * |
||
620 | * PARAMETERS: Buffer - An ACPI table containing one control method |
||
621 | * |
||
622 | * RETURN: Status |
||
623 | * |
||
624 | * DESCRIPTION: Install a control method into the namespace. If the method |
||
625 | * name already exists in the namespace, it is overwritten. The |
||
626 | * input buffer must contain a valid DSDT or SSDT containing a |
||
627 | * single control method. |
||
628 | * |
||
629 | ******************************************************************************/ |
||
630 | |||
631 | ACPI_STATUS |
||
632 | AcpiInstallMethod ( |
||
633 | UINT8 *Buffer) |
||
634 | { |
||
635 | ACPI_TABLE_HEADER *Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Buffer); |
||
636 | UINT8 *AmlBuffer; |
||
637 | UINT8 *AmlStart; |
||
638 | char *Path; |
||
639 | ACPI_NAMESPACE_NODE *Node; |
||
640 | ACPI_OPERAND_OBJECT *MethodObj; |
||
641 | ACPI_PARSE_STATE ParserState; |
||
642 | UINT32 AmlLength; |
||
643 | UINT16 Opcode; |
||
644 | UINT8 MethodFlags; |
||
645 | ACPI_STATUS Status; |
||
646 | |||
647 | |||
648 | /* Parameter validation */ |
||
649 | |||
650 | if (!Buffer) |
||
651 | { |
||
652 | return (AE_BAD_PARAMETER); |
||
653 | } |
||
654 | |||
655 | /* Table must be a DSDT or SSDT */ |
||
656 | |||
657 | if (!ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) && |
||
658 | !ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT)) |
||
659 | { |
||
660 | return (AE_BAD_HEADER); |
||
661 | } |
||
662 | |||
663 | /* First AML opcode in the table must be a control method */ |
||
664 | |||
665 | ParserState.Aml = Buffer + sizeof (ACPI_TABLE_HEADER); |
||
666 | Opcode = AcpiPsPeekOpcode (&ParserState); |
||
667 | if (Opcode != AML_METHOD_OP) |
||
668 | { |
||
669 | return (AE_BAD_PARAMETER); |
||
670 | } |
||
671 | |||
672 | /* Extract method information from the raw AML */ |
||
673 | |||
674 | ParserState.Aml += AcpiPsGetOpcodeSize (Opcode); |
||
675 | ParserState.PkgEnd = AcpiPsGetNextPackageEnd (&ParserState); |
||
676 | Path = AcpiPsGetNextNamestring (&ParserState); |
||
677 | MethodFlags = *ParserState.Aml++; |
||
678 | AmlStart = ParserState.Aml; |
||
679 | AmlLength = ACPI_PTR_DIFF (ParserState.PkgEnd, AmlStart); |
||
680 | |||
681 | /* |
||
682 | * Allocate resources up-front. We don't want to have to delete a new |
||
683 | * node from the namespace if we cannot allocate memory. |
||
684 | */ |
||
685 | AmlBuffer = ACPI_ALLOCATE (AmlLength); |
||
686 | if (!AmlBuffer) |
||
687 | { |
||
688 | return (AE_NO_MEMORY); |
||
689 | } |
||
690 | |||
691 | MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); |
||
692 | if (!MethodObj) |
||
693 | { |
||
694 | ACPI_FREE (AmlBuffer); |
||
695 | return (AE_NO_MEMORY); |
||
696 | } |
||
697 | |||
698 | /* Lock namespace for AcpiNsLookup, we may be creating a new node */ |
||
699 | |||
700 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
||
701 | if (ACPI_FAILURE (Status)) |
||
702 | { |
||
703 | goto ErrorExit; |
||
704 | } |
||
705 | |||
706 | /* The lookup either returns an existing node or creates a new one */ |
||
707 | |||
708 | Status = AcpiNsLookup (NULL, Path, ACPI_TYPE_METHOD, ACPI_IMODE_LOAD_PASS1, |
||
709 | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND, NULL, &Node); |
||
710 | |||
711 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
||
712 | |||
713 | if (ACPI_FAILURE (Status)) /* NsLookup */ |
||
714 | { |
||
715 | if (Status != AE_ALREADY_EXISTS) |
||
716 | { |
||
717 | goto ErrorExit; |
||
718 | } |
||
719 | |||
720 | /* Node existed previously, make sure it is a method node */ |
||
721 | |||
722 | if (Node->Type != ACPI_TYPE_METHOD) |
||
723 | { |
||
724 | Status = AE_TYPE; |
||
725 | goto ErrorExit; |
||
726 | } |
||
727 | } |
||
728 | |||
729 | /* Copy the method AML to the local buffer */ |
||
730 | |||
731 | ACPI_MEMCPY (AmlBuffer, AmlStart, AmlLength); |
||
732 | |||
733 | /* Initialize the method object with the new method's information */ |
||
734 | |||
735 | MethodObj->Method.AmlStart = AmlBuffer; |
||
736 | MethodObj->Method.AmlLength = AmlLength; |
||
737 | |||
738 | MethodObj->Method.ParamCount = (UINT8) |
||
739 | (MethodFlags & AML_METHOD_ARG_COUNT); |
||
740 | |||
741 | if (MethodFlags & AML_METHOD_SERIALIZED) |
||
742 | { |
||
2216 | Serge | 743 | MethodObj->Method.InfoFlags = ACPI_METHOD_SERIALIZED; |
744 | |||
1498 | serge | 745 | MethodObj->Method.SyncLevel = (UINT8) |
746 | ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4); |
||
747 | } |
||
748 | |||
749 | /* |
||
750 | * Now that it is complete, we can attach the new method object to |
||
751 | * the method Node (detaches/deletes any existing object) |
||
752 | */ |
||
2216 | Serge | 753 | Status = AcpiNsAttachObject (Node, MethodObj, ACPI_TYPE_METHOD); |
1498 | serge | 754 | |
755 | /* |
||
756 | * Flag indicates AML buffer is dynamic, must be deleted later. |
||
757 | * Must be set only after attach above. |
||
758 | */ |
||
759 | Node->Flags |= ANOBJ_ALLOCATED_BUFFER; |
||
760 | |||
761 | /* Remove local reference to the method object */ |
||
762 | |||
763 | AcpiUtRemoveReference (MethodObj); |
||
764 | return (Status); |
||
765 | |||
766 | |||
767 | ErrorExit: |
||
768 | |||
769 | ACPI_FREE (AmlBuffer); |
||
770 | ACPI_FREE (MethodObj); |
||
771 | return (Status); |
||
772 | } |
||
773 | |||
774 | ACPI_EXPORT_SYMBOL (AcpiInstallMethod)> |