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1498 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) |
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4 | * |
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5 | *****************************************************************************/ |
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6 | |||
7 | /****************************************************************************** |
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8 | * |
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9 | * 1. Copyright Notice |
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10 | * |
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11 | * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp. |
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12 | * All rights reserved. |
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13 | * |
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14 | * 2. License |
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15 | * |
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16 | * 2.1. This is your license from Intel Corp. under its intellectual property |
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17 | * rights. You may have additional license terms from the party that provided |
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18 | * you this software, covering your right to use that party's intellectual |
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19 | * property rights. |
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20 | * |
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21 | * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a |
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22 | * copy of the source code appearing in this file ("Covered Code") an |
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23 | * irrevocable, perpetual, worldwide license under Intel's copyrights in the |
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24 | * base code distributed originally by Intel ("Original Intel Code") to copy, |
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25 | * make derivatives, distribute, use and display any portion of the Covered |
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26 | * Code in any form, with the right to sublicense such rights; and |
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27 | * |
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28 | * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent |
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29 | * license (with the right to sublicense), under only those claims of Intel |
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30 | * patents that are infringed by the Original Intel Code, to make, use, sell, |
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31 | * offer to sell, and import the Covered Code and derivative works thereof |
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32 | * solely to the minimum extent necessary to exercise the above copyright |
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33 | * license, and in no event shall the patent license extend to any additions |
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34 | * to or modifications of the Original Intel Code. No other license or right |
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35 | * is granted directly or by implication, estoppel or otherwise; |
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36 | * |
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37 | * The above copyright and patent license is granted only if the following |
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38 | * conditions are met: |
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39 | * |
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40 | * 3. Conditions |
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41 | * |
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42 | * 3.1. Redistribution of Source with Rights to Further Distribute Source. |
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43 | * Redistribution of source code of any substantial portion of the Covered |
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44 | * Code or modification with rights to further distribute source must include |
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45 | * the above Copyright Notice, the above License, this list of Conditions, |
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46 | * and the following Disclaimer and Export Compliance provision. In addition, |
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47 | * Licensee must cause all Covered Code to which Licensee contributes to |
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48 | * contain a file documenting the changes Licensee made to create that Covered |
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49 | * Code and the date of any change. Licensee must include in that file the |
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50 | * documentation of any changes made by any predecessor Licensee. Licensee |
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51 | * must include a prominent statement that the modification is derived, |
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52 | * directly or indirectly, from Original Intel Code. |
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53 | * |
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54 | * 3.2. Redistribution of Source with no Rights to Further Distribute Source. |
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55 | * Redistribution of source code of any substantial portion of the Covered |
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56 | * Code or modification without rights to further distribute source must |
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57 | * include the following Disclaimer and Export Compliance provision in the |
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58 | * documentation and/or other materials provided with distribution. In |
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59 | * addition, Licensee may not authorize further sublicense of source of any |
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60 | * portion of the Covered Code, and must include terms to the effect that the |
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61 | * license from Licensee to its licensee is limited to the intellectual |
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62 | * property embodied in the software Licensee provides to its licensee, and |
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63 | * not to intellectual property embodied in modifications its licensee may |
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64 | * make. |
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65 | * |
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66 | * 3.3. Redistribution of Executable. Redistribution in executable form of any |
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67 | * substantial portion of the Covered Code or modification must reproduce the |
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68 | * above Copyright Notice, and the following Disclaimer and Export Compliance |
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69 | * provision in the documentation and/or other materials provided with the |
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70 | * distribution. |
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71 | * |
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72 | * 3.4. Intel retains all right, title, and interest in and to the Original |
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73 | * Intel Code. |
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74 | * |
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75 | * 3.5. Neither the name Intel nor any other trademark owned or controlled by |
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76 | * Intel shall be used in advertising or otherwise to promote the sale, use or |
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77 | * other dealings in products derived from or relating to the Covered Code |
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78 | * without prior written authorization from Intel. |
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79 | * |
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80 | * 4. Disclaimer and Export Compliance |
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81 | * |
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82 | * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED |
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83 | * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE |
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84 | * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, |
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85 | * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY |
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86 | |||
87 | * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY |
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88 | * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A |
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89 | * PARTICULAR PURPOSE. |
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90 | * |
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91 | * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES |
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92 | * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR |
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93 | * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, |
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94 | * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY |
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95 | * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL |
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96 | * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS |
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97 | * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY |
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98 | * LIMITED REMEDY. |
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99 | * |
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100 | * 4.3. Licensee shall not export, either directly or indirectly, any of this |
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101 | * software or system incorporating such software without first obtaining any |
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102 | * required license or other approval from the U. S. Department of Commerce or |
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103 | * any other agency or department of the United States Government. In the |
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104 | * event Licensee exports any such software from the United States or |
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105 | * re-exports any such software from a foreign destination, Licensee shall |
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106 | * ensure that the distribution and export/re-export of the software is in |
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107 | * compliance with all laws, regulations, orders, or other restrictions of the |
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108 | * U.S. Export Administration Regulations. Licensee agrees that neither it nor |
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109 | * any of its subsidiaries will export/re-export any technical data, process, |
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110 | * software, or service, directly or indirectly, to any country for which the |
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111 | * United States government or any agency thereof requires an export license, |
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112 | * other governmental approval, or letter of assurance, without first obtaining |
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113 | * such license, approval or letter. |
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114 | * |
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115 | *****************************************************************************/ |
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116 | |||
117 | #define __EXCONFIG_C__ |
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118 | |||
119 | #include "acpi.h" |
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120 | #include "accommon.h" |
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121 | #include "acinterp.h" |
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122 | #include "acnamesp.h" |
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123 | #include "actables.h" |
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124 | #include "acdispat.h" |
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125 | #include "acevents.h" |
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126 | |||
127 | |||
128 | #define _COMPONENT ACPI_EXECUTER |
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129 | ACPI_MODULE_NAME ("exconfig") |
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130 | |||
131 | /* Local prototypes */ |
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132 | |||
133 | static ACPI_STATUS |
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134 | AcpiExAddTable ( |
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135 | UINT32 TableIndex, |
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136 | ACPI_NAMESPACE_NODE *ParentNode, |
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137 | ACPI_OPERAND_OBJECT **DdbHandle); |
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138 | |||
139 | static ACPI_STATUS |
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140 | AcpiExRegionRead ( |
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141 | ACPI_OPERAND_OBJECT *ObjDesc, |
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142 | UINT32 Length, |
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143 | UINT8 *Buffer); |
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144 | |||
145 | |||
146 | /******************************************************************************* |
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147 | * |
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148 | * FUNCTION: AcpiExAddTable |
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149 | * |
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150 | * PARAMETERS: Table - Pointer to raw table |
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151 | * ParentNode - Where to load the table (scope) |
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152 | * DdbHandle - Where to return the table handle. |
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153 | * |
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154 | * RETURN: Status |
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155 | * |
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156 | * DESCRIPTION: Common function to Install and Load an ACPI table with a |
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157 | * returned table handle. |
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158 | * |
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159 | ******************************************************************************/ |
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160 | |||
161 | static ACPI_STATUS |
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162 | AcpiExAddTable ( |
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163 | UINT32 TableIndex, |
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164 | ACPI_NAMESPACE_NODE *ParentNode, |
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165 | ACPI_OPERAND_OBJECT **DdbHandle) |
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166 | { |
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167 | ACPI_OPERAND_OBJECT *ObjDesc; |
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168 | ACPI_STATUS Status; |
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169 | ACPI_OWNER_ID OwnerId; |
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170 | |||
171 | |||
172 | ACPI_FUNCTION_TRACE (ExAddTable); |
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173 | |||
174 | |||
175 | /* Create an object to be the table handle */ |
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176 | |||
177 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE); |
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178 | if (!ObjDesc) |
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179 | { |
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180 | return_ACPI_STATUS (AE_NO_MEMORY); |
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181 | } |
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182 | |||
183 | /* Init the table handle */ |
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184 | |||
185 | ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID; |
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186 | ObjDesc->Reference.Class = ACPI_REFCLASS_TABLE; |
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187 | *DdbHandle = ObjDesc; |
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188 | |||
189 | /* Install the new table into the local data structures */ |
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190 | |||
191 | ObjDesc->Reference.Value = TableIndex; |
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192 | |||
193 | /* Add the table to the namespace */ |
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194 | |||
195 | Status = AcpiNsLoadTable (TableIndex, ParentNode); |
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196 | if (ACPI_FAILURE (Status)) |
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197 | { |
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198 | AcpiUtRemoveReference (ObjDesc); |
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199 | *DdbHandle = NULL; |
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200 | return_ACPI_STATUS (Status); |
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201 | } |
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202 | |||
203 | /* Execute any module-level code that was found in the table */ |
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204 | |||
205 | AcpiExExitInterpreter (); |
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206 | AcpiNsExecModuleCodeList (); |
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207 | AcpiExEnterInterpreter (); |
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208 | |||
209 | /* Update GPEs for any new _PRW or _Lxx/_Exx methods. Ignore errors */ |
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210 | |||
211 | Status = AcpiTbGetOwnerId (TableIndex, &OwnerId); |
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212 | if (ACPI_SUCCESS (Status)) |
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213 | { |
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214 | AcpiEvUpdateGpes (OwnerId); |
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215 | } |
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216 | |||
217 | return_ACPI_STATUS (AE_OK); |
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218 | } |
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219 | |||
220 | |||
221 | /******************************************************************************* |
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222 | * |
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223 | * FUNCTION: AcpiExLoadTableOp |
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224 | * |
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225 | * PARAMETERS: WalkState - Current state with operands |
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226 | * ReturnDesc - Where to store the return object |
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227 | * |
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228 | * RETURN: Status |
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229 | * |
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230 | * DESCRIPTION: Load an ACPI table from the RSDT/XSDT |
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231 | * |
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232 | ******************************************************************************/ |
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233 | |||
234 | ACPI_STATUS |
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235 | AcpiExLoadTableOp ( |
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236 | ACPI_WALK_STATE *WalkState, |
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237 | ACPI_OPERAND_OBJECT **ReturnDesc) |
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238 | { |
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239 | ACPI_STATUS Status; |
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240 | ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; |
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241 | ACPI_NAMESPACE_NODE *ParentNode; |
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242 | ACPI_NAMESPACE_NODE *StartNode; |
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243 | ACPI_NAMESPACE_NODE *ParameterNode = NULL; |
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244 | ACPI_OPERAND_OBJECT *DdbHandle; |
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245 | ACPI_TABLE_HEADER *Table; |
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246 | UINT32 TableIndex; |
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247 | |||
248 | |||
249 | ACPI_FUNCTION_TRACE (ExLoadTableOp); |
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250 | |||
251 | |||
252 | /* Validate lengths for the SignatureString, OEMIDString, OEMTableID */ |
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253 | |||
254 | if ((Operand[0]->String.Length > ACPI_NAME_SIZE) || |
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255 | (Operand[1]->String.Length > ACPI_OEM_ID_SIZE) || |
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256 | (Operand[2]->String.Length > ACPI_OEM_TABLE_ID_SIZE)) |
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257 | { |
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258 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
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259 | } |
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260 | |||
261 | /* Find the ACPI table in the RSDT/XSDT */ |
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262 | |||
263 | Status = AcpiTbFindTable (Operand[0]->String.Pointer, |
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264 | Operand[1]->String.Pointer, |
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265 | Operand[2]->String.Pointer, &TableIndex); |
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266 | if (ACPI_FAILURE (Status)) |
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267 | { |
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268 | if (Status != AE_NOT_FOUND) |
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269 | { |
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270 | return_ACPI_STATUS (Status); |
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271 | } |
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272 | |||
273 | /* Table not found, return an Integer=0 and AE_OK */ |
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274 | |||
275 | DdbHandle = AcpiUtCreateIntegerObject ((UINT64) 0); |
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276 | if (!DdbHandle) |
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277 | { |
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278 | return_ACPI_STATUS (AE_NO_MEMORY); |
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279 | } |
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280 | |||
281 | *ReturnDesc = DdbHandle; |
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282 | return_ACPI_STATUS (AE_OK); |
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283 | } |
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284 | |||
285 | /* Default nodes */ |
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286 | |||
287 | StartNode = WalkState->ScopeInfo->Scope.Node; |
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288 | ParentNode = AcpiGbl_RootNode; |
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289 | |||
290 | /* RootPath (optional parameter) */ |
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291 | |||
292 | if (Operand[3]->String.Length > 0) |
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293 | { |
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294 | /* |
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295 | * Find the node referenced by the RootPathString. This is the |
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296 | * location within the namespace where the table will be loaded. |
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297 | */ |
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298 | Status = AcpiNsGetNode (StartNode, Operand[3]->String.Pointer, |
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299 | ACPI_NS_SEARCH_PARENT, &ParentNode); |
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300 | if (ACPI_FAILURE (Status)) |
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301 | { |
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302 | return_ACPI_STATUS (Status); |
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303 | } |
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304 | } |
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305 | |||
306 | /* ParameterPath (optional parameter) */ |
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307 | |||
308 | if (Operand[4]->String.Length > 0) |
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309 | { |
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310 | if ((Operand[4]->String.Pointer[0] != '\\') && |
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311 | (Operand[4]->String.Pointer[0] != '^')) |
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312 | { |
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313 | /* |
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314 | * Path is not absolute, so it will be relative to the node |
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315 | * referenced by the RootPathString (or the NS root if omitted) |
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316 | */ |
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317 | StartNode = ParentNode; |
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318 | } |
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319 | |||
320 | /* Find the node referenced by the ParameterPathString */ |
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321 | |||
322 | Status = AcpiNsGetNode (StartNode, Operand[4]->String.Pointer, |
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323 | ACPI_NS_SEARCH_PARENT, &ParameterNode); |
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324 | if (ACPI_FAILURE (Status)) |
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325 | { |
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326 | return_ACPI_STATUS (Status); |
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327 | } |
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328 | } |
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329 | |||
330 | /* Load the table into the namespace */ |
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331 | |||
332 | Status = AcpiExAddTable (TableIndex, ParentNode, &DdbHandle); |
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333 | if (ACPI_FAILURE (Status)) |
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334 | { |
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335 | return_ACPI_STATUS (Status); |
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336 | } |
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337 | |||
338 | /* Parameter Data (optional) */ |
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339 | |||
340 | if (ParameterNode) |
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341 | { |
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342 | /* Store the parameter data into the optional parameter object */ |
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343 | |||
344 | Status = AcpiExStore (Operand[5], |
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345 | ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParameterNode), |
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346 | WalkState); |
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347 | if (ACPI_FAILURE (Status)) |
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348 | { |
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349 | (void) AcpiExUnloadTable (DdbHandle); |
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350 | |||
351 | AcpiUtRemoveReference (DdbHandle); |
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352 | return_ACPI_STATUS (Status); |
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353 | } |
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354 | } |
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355 | |||
356 | Status = AcpiGetTableByIndex (TableIndex, &Table); |
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357 | if (ACPI_SUCCESS (Status)) |
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358 | { |
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359 | ACPI_INFO ((AE_INFO, "Dynamic OEM Table Load:")); |
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360 | AcpiTbPrintTableHeader (0, Table); |
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361 | } |
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362 | |||
363 | /* Invoke table handler if present */ |
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364 | |||
365 | if (AcpiGbl_TableHandler) |
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366 | { |
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367 | (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table, |
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368 | AcpiGbl_TableHandlerContext); |
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369 | } |
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370 | |||
371 | *ReturnDesc = DdbHandle; |
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372 | return_ACPI_STATUS (Status); |
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373 | } |
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374 | |||
375 | |||
376 | /******************************************************************************* |
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377 | * |
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378 | * FUNCTION: AcpiExRegionRead |
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379 | * |
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380 | * PARAMETERS: ObjDesc - Region descriptor |
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381 | * Length - Number of bytes to read |
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382 | * Buffer - Pointer to where to put the data |
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383 | * |
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384 | * RETURN: Status |
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385 | * |
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386 | * DESCRIPTION: Read data from an operation region. The read starts from the |
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387 | * beginning of the region. |
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388 | * |
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389 | ******************************************************************************/ |
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390 | |||
391 | static ACPI_STATUS |
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392 | AcpiExRegionRead ( |
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393 | ACPI_OPERAND_OBJECT *ObjDesc, |
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394 | UINT32 Length, |
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395 | UINT8 *Buffer) |
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396 | { |
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397 | ACPI_STATUS Status; |
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398 | UINT64 Value; |
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399 | UINT32 RegionOffset = 0; |
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400 | UINT32 i; |
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401 | |||
402 | |||
403 | /* Bytewise reads */ |
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404 | |||
405 | for (i = 0; i < Length; i++) |
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406 | { |
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407 | Status = AcpiEvAddressSpaceDispatch (ObjDesc, ACPI_READ, |
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408 | RegionOffset, 8, &Value); |
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409 | if (ACPI_FAILURE (Status)) |
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410 | { |
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411 | return (Status); |
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412 | } |
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413 | |||
414 | *Buffer = (UINT8) Value; |
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415 | Buffer++; |
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416 | RegionOffset++; |
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417 | } |
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418 | |||
419 | return (AE_OK); |
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420 | } |
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421 | |||
422 | |||
423 | /******************************************************************************* |
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424 | * |
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425 | * FUNCTION: AcpiExLoadOp |
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426 | * |
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427 | * PARAMETERS: ObjDesc - Region or Buffer/Field where the table will be |
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428 | * obtained |
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429 | * Target - Where a handle to the table will be stored |
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430 | * WalkState - Current state |
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431 | * |
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432 | * RETURN: Status |
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433 | * |
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434 | * DESCRIPTION: Load an ACPI table from a field or operation region |
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435 | * |
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436 | * NOTE: Region Fields (Field, BankField, IndexFields) are resolved to buffer |
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437 | * objects before this code is reached. |
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438 | * |
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439 | * If source is an operation region, it must refer to SystemMemory, as |
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440 | * per the ACPI specification. |
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441 | * |
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442 | ******************************************************************************/ |
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443 | |||
444 | ACPI_STATUS |
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445 | AcpiExLoadOp ( |
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446 | ACPI_OPERAND_OBJECT *ObjDesc, |
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447 | ACPI_OPERAND_OBJECT *Target, |
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448 | ACPI_WALK_STATE *WalkState) |
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449 | { |
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450 | ACPI_OPERAND_OBJECT *DdbHandle; |
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451 | ACPI_TABLE_HEADER *Table; |
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452 | ACPI_TABLE_DESC TableDesc; |
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453 | UINT32 TableIndex; |
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454 | ACPI_STATUS Status; |
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455 | UINT32 Length; |
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456 | |||
457 | |||
458 | ACPI_FUNCTION_TRACE (ExLoadOp); |
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459 | |||
460 | |||
461 | ACPI_MEMSET (&TableDesc, 0, sizeof (ACPI_TABLE_DESC)); |
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462 | |||
463 | /* Source Object can be either an OpRegion or a Buffer/Field */ |
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464 | |||
465 | switch (ObjDesc->Common.Type) |
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466 | { |
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467 | case ACPI_TYPE_REGION: |
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468 | |||
469 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
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470 | "Load table from Region %p\n", ObjDesc)); |
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471 | |||
472 | /* Region must be SystemMemory (from ACPI spec) */ |
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473 | |||
474 | if (ObjDesc->Region.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
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475 | { |
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476 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); |
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477 | } |
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478 | |||
479 | /* |
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480 | * If the Region Address and Length have not been previously evaluated, |
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481 | * evaluate them now and save the results. |
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482 | */ |
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483 | if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) |
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484 | { |
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485 | Status = AcpiDsGetRegionArguments (ObjDesc); |
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486 | if (ACPI_FAILURE (Status)) |
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487 | { |
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488 | return_ACPI_STATUS (Status); |
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489 | } |
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490 | } |
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491 | |||
492 | /* Get the table header first so we can get the table length */ |
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493 | |||
494 | Table = ACPI_ALLOCATE (sizeof (ACPI_TABLE_HEADER)); |
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495 | if (!Table) |
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496 | { |
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497 | return_ACPI_STATUS (AE_NO_MEMORY); |
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498 | } |
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499 | |||
500 | Status = AcpiExRegionRead (ObjDesc, sizeof (ACPI_TABLE_HEADER), |
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501 | ACPI_CAST_PTR (UINT8, Table)); |
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502 | Length = Table->Length; |
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503 | ACPI_FREE (Table); |
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504 | |||
505 | if (ACPI_FAILURE (Status)) |
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506 | { |
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507 | return_ACPI_STATUS (Status); |
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508 | } |
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509 | |||
510 | /* Must have at least an ACPI table header */ |
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511 | |||
512 | if (Length < sizeof (ACPI_TABLE_HEADER)) |
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513 | { |
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514 | return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); |
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515 | } |
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516 | |||
517 | /* |
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518 | * The original implementation simply mapped the table, with no copy. |
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519 | * However, the memory region is not guaranteed to remain stable and |
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520 | * we must copy the table to a local buffer. For example, the memory |
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521 | * region is corrupted after suspend on some machines. Dynamically |
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522 | * loaded tables are usually small, so this overhead is minimal. |
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523 | * |
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524 | * The latest implementation (5/2009) does not use a mapping at all. |
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525 | * We use the low-level operation region interface to read the table |
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526 | * instead of the obvious optimization of using a direct mapping. |
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527 | * This maintains a consistent use of operation regions across the |
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528 | * entire subsystem. This is important if additional processing must |
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529 | * be performed in the (possibly user-installed) operation region |
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530 | * handler. For example, AcpiExec and ASLTS depend on this. |
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531 | */ |
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532 | |||
533 | /* Allocate a buffer for the table */ |
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534 | |||
535 | TableDesc.Pointer = ACPI_ALLOCATE (Length); |
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536 | if (!TableDesc.Pointer) |
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537 | { |
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538 | return_ACPI_STATUS (AE_NO_MEMORY); |
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539 | } |
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540 | |||
541 | /* Read the entire table */ |
||
542 | |||
543 | Status = AcpiExRegionRead (ObjDesc, Length, |
||
544 | ACPI_CAST_PTR (UINT8, TableDesc.Pointer)); |
||
545 | if (ACPI_FAILURE (Status)) |
||
546 | { |
||
547 | ACPI_FREE (TableDesc.Pointer); |
||
548 | return_ACPI_STATUS (Status); |
||
549 | } |
||
550 | |||
551 | TableDesc.Address = ObjDesc->Region.Address; |
||
552 | break; |
||
553 | |||
554 | |||
555 | case ACPI_TYPE_BUFFER: /* Buffer or resolved RegionField */ |
||
556 | |||
557 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
||
558 | "Load table from Buffer or Field %p\n", ObjDesc)); |
||
559 | |||
560 | /* Must have at least an ACPI table header */ |
||
561 | |||
562 | if (ObjDesc->Buffer.Length < sizeof (ACPI_TABLE_HEADER)) |
||
563 | { |
||
564 | return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); |
||
565 | } |
||
566 | |||
567 | /* Get the actual table length from the table header */ |
||
568 | |||
569 | Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, ObjDesc->Buffer.Pointer); |
||
570 | Length = Table->Length; |
||
571 | |||
572 | /* Table cannot extend beyond the buffer */ |
||
573 | |||
574 | if (Length > ObjDesc->Buffer.Length) |
||
575 | { |
||
576 | return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); |
||
577 | } |
||
578 | if (Length < sizeof (ACPI_TABLE_HEADER)) |
||
579 | { |
||
580 | return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); |
||
581 | } |
||
582 | |||
583 | /* |
||
584 | * Copy the table from the buffer because the buffer could be modified |
||
585 | * or even deleted in the future |
||
586 | */ |
||
587 | TableDesc.Pointer = ACPI_ALLOCATE (Length); |
||
588 | if (!TableDesc.Pointer) |
||
589 | { |
||
590 | return_ACPI_STATUS (AE_NO_MEMORY); |
||
591 | } |
||
592 | |||
593 | ACPI_MEMCPY (TableDesc.Pointer, Table, Length); |
||
594 | TableDesc.Address = ACPI_TO_INTEGER (TableDesc.Pointer); |
||
595 | break; |
||
596 | |||
597 | |||
598 | default: |
||
599 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); |
||
600 | } |
||
601 | |||
602 | /* Validate table checksum (will not get validated in TbAddTable) */ |
||
603 | |||
604 | Status = AcpiTbVerifyChecksum (TableDesc.Pointer, Length); |
||
605 | if (ACPI_FAILURE (Status)) |
||
606 | { |
||
607 | ACPI_FREE (TableDesc.Pointer); |
||
608 | return_ACPI_STATUS (Status); |
||
609 | } |
||
610 | |||
611 | /* Complete the table descriptor */ |
||
612 | |||
613 | TableDesc.Length = Length; |
||
614 | TableDesc.Flags = ACPI_TABLE_ORIGIN_ALLOCATED; |
||
615 | |||
616 | /* Install the new table into the local data structures */ |
||
617 | |||
618 | Status = AcpiTbAddTable (&TableDesc, &TableIndex); |
||
619 | if (ACPI_FAILURE (Status)) |
||
620 | { |
||
621 | /* Delete allocated table buffer */ |
||
622 | |||
623 | AcpiTbDeleteTable (&TableDesc); |
||
624 | return_ACPI_STATUS (Status); |
||
625 | } |
||
626 | |||
627 | /* |
||
628 | * Add the table to the namespace. |
||
629 | * |
||
630 | * Note: Load the table objects relative to the root of the namespace. |
||
631 | * This appears to go against the ACPI specification, but we do it for |
||
632 | * compatibility with other ACPI implementations. |
||
633 | */ |
||
634 | Status = AcpiExAddTable (TableIndex, AcpiGbl_RootNode, &DdbHandle); |
||
635 | if (ACPI_FAILURE (Status)) |
||
636 | { |
||
637 | /* On error, TablePtr was deallocated above */ |
||
638 | |||
639 | return_ACPI_STATUS (Status); |
||
640 | } |
||
641 | |||
642 | /* Store the DdbHandle into the Target operand */ |
||
643 | |||
644 | Status = AcpiExStore (DdbHandle, Target, WalkState); |
||
645 | if (ACPI_FAILURE (Status)) |
||
646 | { |
||
647 | (void) AcpiExUnloadTable (DdbHandle); |
||
648 | |||
649 | /* TablePtr was deallocated above */ |
||
650 | |||
651 | AcpiUtRemoveReference (DdbHandle); |
||
652 | return_ACPI_STATUS (Status); |
||
653 | } |
||
654 | |||
655 | ACPI_INFO ((AE_INFO, "Dynamic OEM Table Load:")); |
||
656 | AcpiTbPrintTableHeader (0, TableDesc.Pointer); |
||
657 | |||
658 | /* Remove the reference by added by AcpiExStore above */ |
||
659 | |||
660 | AcpiUtRemoveReference (DdbHandle); |
||
661 | |||
662 | /* Invoke table handler if present */ |
||
663 | |||
664 | if (AcpiGbl_TableHandler) |
||
665 | { |
||
666 | (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, TableDesc.Pointer, |
||
667 | AcpiGbl_TableHandlerContext); |
||
668 | } |
||
669 | |||
670 | return_ACPI_STATUS (Status); |
||
671 | } |
||
672 | |||
673 | |||
674 | /******************************************************************************* |
||
675 | * |
||
676 | * FUNCTION: AcpiExUnloadTable |
||
677 | * |
||
678 | * PARAMETERS: DdbHandle - Handle to a previously loaded table |
||
679 | * |
||
680 | * RETURN: Status |
||
681 | * |
||
682 | * DESCRIPTION: Unload an ACPI table |
||
683 | * |
||
684 | ******************************************************************************/ |
||
685 | |||
686 | ACPI_STATUS |
||
687 | AcpiExUnloadTable ( |
||
688 | ACPI_OPERAND_OBJECT *DdbHandle) |
||
689 | { |
||
690 | ACPI_STATUS Status = AE_OK; |
||
691 | ACPI_OPERAND_OBJECT *TableDesc = DdbHandle; |
||
692 | UINT32 TableIndex; |
||
693 | ACPI_TABLE_HEADER *Table; |
||
694 | |||
695 | |||
696 | ACPI_FUNCTION_TRACE (ExUnloadTable); |
||
697 | |||
698 | |||
699 | /* |
||
700 | * Validate the handle |
||
701 | * Although the handle is partially validated in AcpiExReconfiguration() |
||
702 | * when it calls AcpiExResolveOperands(), the handle is more completely |
||
703 | * validated here. |
||
704 | * |
||
705 | * Handle must be a valid operand object of type reference. Also, the |
||
706 | * DdbHandle must still be marked valid (table has not been previously |
||
707 | * unloaded) |
||
708 | */ |
||
709 | if ((!DdbHandle) || |
||
710 | (ACPI_GET_DESCRIPTOR_TYPE (DdbHandle) != ACPI_DESC_TYPE_OPERAND) || |
||
711 | (DdbHandle->Common.Type != ACPI_TYPE_LOCAL_REFERENCE) || |
||
712 | (!(DdbHandle->Common.Flags & AOPOBJ_DATA_VALID))) |
||
713 | { |
||
714 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
||
715 | } |
||
716 | |||
717 | /* Get the table index from the DdbHandle */ |
||
718 | |||
719 | TableIndex = TableDesc->Reference.Value; |
||
720 | |||
721 | /* Ensure the table is still loaded */ |
||
722 | |||
723 | if (!AcpiTbIsTableLoaded (TableIndex)) |
||
724 | { |
||
725 | return_ACPI_STATUS (AE_NOT_EXIST); |
||
726 | } |
||
727 | |||
728 | /* Invoke table handler if present */ |
||
729 | |||
730 | if (AcpiGbl_TableHandler) |
||
731 | { |
||
732 | Status = AcpiGetTableByIndex (TableIndex, &Table); |
||
733 | if (ACPI_SUCCESS (Status)) |
||
734 | { |
||
735 | (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD, Table, |
||
736 | AcpiGbl_TableHandlerContext); |
||
737 | } |
||
738 | } |
||
739 | |||
740 | /* Delete the portion of the namespace owned by this table */ |
||
741 | |||
742 | Status = AcpiTbDeleteNamespaceByOwner (TableIndex); |
||
743 | if (ACPI_FAILURE (Status)) |
||
744 | { |
||
745 | return_ACPI_STATUS (Status); |
||
746 | } |
||
747 | |||
748 | (void) AcpiTbReleaseOwnerId (TableIndex); |
||
749 | AcpiTbSetTableLoadedFlag (TableIndex, FALSE); |
||
750 | |||
751 | /* |
||
752 | * Invalidate the handle. We do this because the handle may be stored |
||
753 | * in a named object and may not be actually deleted until much later. |
||
754 | */ |
||
755 | DdbHandle->Common.Flags &= ~AOPOBJ_DATA_VALID; |
||
756 | return_ACPI_STATUS (AE_OK); |
||
757 | }>>>> |
||
758 |