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1498 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: evgpe - General Purpose Event handling and dispatch |
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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 | * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY |
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87 | * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A |
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88 | * PARTICULAR PURPOSE. |
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89 | * |
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90 | * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES |
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91 | * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR |
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92 | * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, |
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93 | * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY |
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94 | * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL |
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95 | * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS |
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96 | * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY |
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97 | * LIMITED REMEDY. |
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98 | * |
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99 | * 4.3. Licensee shall not export, either directly or indirectly, any of this |
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100 | * software or system incorporating such software without first obtaining any |
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101 | * required license or other approval from the U. S. Department of Commerce or |
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102 | * any other agency or department of the United States Government. In the |
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103 | * event Licensee exports any such software from the United States or |
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104 | * re-exports any such software from a foreign destination, Licensee shall |
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105 | * ensure that the distribution and export/re-export of the software is in |
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106 | * compliance with all laws, regulations, orders, or other restrictions of the |
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107 | * U.S. Export Administration Regulations. Licensee agrees that neither it nor |
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108 | * any of its subsidiaries will export/re-export any technical data, process, |
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109 | * software, or service, directly or indirectly, to any country for which the |
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110 | * United States government or any agency thereof requires an export license, |
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111 | * other governmental approval, or letter of assurance, without first obtaining |
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112 | * such license, approval or letter. |
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113 | * |
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114 | *****************************************************************************/ |
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115 | |||
116 | #include "acpi.h" |
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117 | #include "accommon.h" |
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118 | #include "acevents.h" |
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119 | #include "acnamesp.h" |
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120 | |||
121 | #define _COMPONENT ACPI_EVENTS |
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122 | ACPI_MODULE_NAME ("evgpe") |
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123 | |||
124 | /* Local prototypes */ |
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125 | |||
126 | static void ACPI_SYSTEM_XFACE |
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127 | AcpiEvAsynchExecuteGpeMethod ( |
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128 | void *Context); |
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129 | |||
130 | static void ACPI_SYSTEM_XFACE |
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131 | AcpiEvAsynchEnableGpe ( |
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132 | void *Context); |
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133 | |||
134 | |||
135 | /******************************************************************************* |
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136 | * |
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137 | * FUNCTION: AcpiEvUpdateGpeEnableMasks |
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138 | * |
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139 | * PARAMETERS: GpeEventInfo - GPE to update |
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140 | * |
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141 | * RETURN: Status |
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142 | * |
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143 | * DESCRIPTION: Updates GPE register enable masks based upon whether there are |
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144 | * references (either wake or run) to this GPE |
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145 | * |
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146 | ******************************************************************************/ |
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147 | |||
148 | ACPI_STATUS |
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149 | AcpiEvUpdateGpeEnableMasks ( |
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150 | ACPI_GPE_EVENT_INFO *GpeEventInfo) |
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151 | { |
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152 | ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; |
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153 | UINT8 RegisterBit; |
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154 | |||
155 | |||
156 | ACPI_FUNCTION_TRACE (EvUpdateGpeEnableMasks); |
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157 | |||
158 | |||
159 | GpeRegisterInfo = GpeEventInfo->RegisterInfo; |
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160 | if (!GpeRegisterInfo) |
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161 | { |
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162 | return_ACPI_STATUS (AE_NOT_EXIST); |
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163 | } |
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164 | |||
165 | RegisterBit = (UINT8) |
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166 | (1 << (GpeEventInfo->GpeNumber - GpeRegisterInfo->BaseGpeNumber)); |
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167 | |||
168 | /* Clear the wake/run bits up front */ |
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169 | |||
170 | ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); |
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171 | ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); |
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172 | |||
173 | /* Set the mask bits only if there are references to this GPE */ |
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174 | |||
175 | if (GpeEventInfo->RuntimeCount) |
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176 | { |
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177 | ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); |
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178 | } |
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179 | |||
180 | if (GpeEventInfo->WakeupCount) |
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181 | { |
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182 | ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); |
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183 | } |
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184 | |||
185 | return_ACPI_STATUS (AE_OK); |
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186 | } |
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187 | |||
188 | |||
189 | /******************************************************************************* |
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190 | * |
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191 | * FUNCTION: AcpiEvEnableGpe |
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192 | * |
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193 | * PARAMETERS: GpeEventInfo - GPE to enable |
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194 | * |
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195 | * RETURN: Status |
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196 | * |
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197 | * DESCRIPTION: Hardware-enable a GPE. Always enables the GPE, regardless |
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198 | * of type or number of references. |
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199 | * |
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200 | * Note: The GPE lock should be already acquired when this function is called. |
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201 | * |
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202 | ******************************************************************************/ |
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203 | |||
204 | ACPI_STATUS |
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205 | AcpiEvEnableGpe ( |
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206 | ACPI_GPE_EVENT_INFO *GpeEventInfo) |
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207 | { |
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208 | ACPI_STATUS Status; |
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209 | |||
210 | |||
211 | ACPI_FUNCTION_TRACE (EvEnableGpe); |
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212 | |||
213 | |||
214 | /* |
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215 | * We will only allow a GPE to be enabled if it has either an |
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216 | * associated method (_Lxx/_Exx) or a handler. Otherwise, the |
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217 | * GPE will be immediately disabled by AcpiEvGpeDispatch the |
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218 | * first time it fires. |
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219 | */ |
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220 | if (!(GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK)) |
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221 | { |
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222 | return_ACPI_STATUS (AE_NO_HANDLER); |
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223 | } |
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224 | |||
225 | /* Ensure the HW enable masks are current */ |
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226 | |||
227 | Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo); |
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228 | if (ACPI_FAILURE (Status)) |
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229 | { |
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230 | return_ACPI_STATUS (Status); |
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231 | } |
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232 | |||
233 | /* Clear the GPE (of stale events) */ |
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234 | |||
235 | Status = AcpiHwClearGpe (GpeEventInfo); |
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236 | if (ACPI_FAILURE (Status)) |
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237 | { |
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238 | return_ACPI_STATUS (Status); |
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239 | } |
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240 | |||
241 | /* Enable the requested GPE */ |
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242 | |||
243 | Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); |
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244 | return_ACPI_STATUS (Status); |
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245 | } |
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246 | |||
247 | |||
248 | /******************************************************************************* |
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249 | * |
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250 | * FUNCTION: AcpiEvDisableGpe |
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251 | * |
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252 | * PARAMETERS: GpeEventInfo - GPE to disable |
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253 | * |
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254 | * RETURN: Status |
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255 | * |
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256 | * DESCRIPTION: Hardware-disable a GPE. Always disables the requested GPE, |
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257 | * regardless of the type or number of references. |
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258 | * |
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259 | * Note: The GPE lock should be already acquired when this function is called. |
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260 | * |
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261 | ******************************************************************************/ |
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262 | |||
263 | ACPI_STATUS |
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264 | AcpiEvDisableGpe ( |
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265 | ACPI_GPE_EVENT_INFO *GpeEventInfo) |
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266 | { |
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267 | ACPI_STATUS Status; |
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268 | |||
269 | |||
270 | ACPI_FUNCTION_TRACE (EvDisableGpe); |
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271 | |||
272 | |||
273 | /* |
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274 | * Note: Always disable the GPE, even if we think that that it is already |
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275 | * disabled. It is possible that the AML or some other code has enabled |
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276 | * the GPE behind our back. |
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277 | */ |
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278 | |||
279 | /* Ensure the HW enable masks are current */ |
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280 | |||
281 | Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo); |
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282 | if (ACPI_FAILURE (Status)) |
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283 | { |
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284 | return_ACPI_STATUS (Status); |
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285 | } |
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286 | |||
287 | /* |
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288 | * Always H/W disable this GPE, even if we don't know the GPE type. |
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289 | * Simply clear the enable bit for this particular GPE, but do not |
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290 | * write out the current GPE enable mask since this may inadvertently |
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291 | * enable GPEs too early. An example is a rogue GPE that has arrived |
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292 | * during ACPICA initialization - possibly because AML or other code |
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293 | * has enabled the GPE. |
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294 | */ |
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295 | Status = AcpiHwLowDisableGpe (GpeEventInfo); |
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296 | return_ACPI_STATUS (Status); |
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297 | } |
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298 | |||
299 | |||
300 | /******************************************************************************* |
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301 | * |
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302 | * FUNCTION: AcpiEvLowGetGpeInfo |
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303 | * |
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304 | * PARAMETERS: GpeNumber - Raw GPE number |
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305 | * GpeBlock - A GPE info block |
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306 | * |
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307 | * RETURN: A GPE EventInfo struct. NULL if not a valid GPE (The GpeNumber |
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308 | * is not within the specified GPE block) |
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309 | * |
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310 | * DESCRIPTION: Returns the EventInfo struct associated with this GPE. This is |
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311 | * the low-level implementation of EvGetGpeEventInfo. |
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312 | * |
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313 | ******************************************************************************/ |
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314 | |||
315 | ACPI_GPE_EVENT_INFO * |
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316 | AcpiEvLowGetGpeInfo ( |
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317 | UINT32 GpeNumber, |
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318 | ACPI_GPE_BLOCK_INFO *GpeBlock) |
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319 | { |
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320 | UINT32 GpeIndex; |
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321 | |||
322 | |||
323 | /* |
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324 | * Validate that the GpeNumber is within the specified GpeBlock. |
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325 | * (Two steps) |
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326 | */ |
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327 | if (!GpeBlock || |
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328 | (GpeNumber < GpeBlock->BlockBaseNumber)) |
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329 | { |
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330 | return (NULL); |
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331 | } |
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332 | |||
333 | GpeIndex = GpeNumber - GpeBlock->BlockBaseNumber; |
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334 | if (GpeIndex >= GpeBlock->GpeCount) |
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335 | { |
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336 | return (NULL); |
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337 | } |
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338 | |||
339 | return (&GpeBlock->EventInfo[GpeIndex]); |
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340 | } |
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341 | |||
342 | |||
343 | /******************************************************************************* |
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344 | * |
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345 | * FUNCTION: AcpiEvGetGpeEventInfo |
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346 | * |
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347 | * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 |
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348 | * GpeNumber - Raw GPE number |
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349 | * |
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350 | * RETURN: A GPE EventInfo struct. NULL if not a valid GPE |
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351 | * |
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352 | * DESCRIPTION: Returns the EventInfo struct associated with this GPE. |
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353 | * Validates the GpeBlock and the GpeNumber |
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354 | * |
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355 | * Should be called only when the GPE lists are semaphore locked |
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356 | * and not subject to change. |
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357 | * |
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358 | ******************************************************************************/ |
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359 | |||
360 | ACPI_GPE_EVENT_INFO * |
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361 | AcpiEvGetGpeEventInfo ( |
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362 | ACPI_HANDLE GpeDevice, |
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363 | UINT32 GpeNumber) |
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364 | { |
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365 | ACPI_OPERAND_OBJECT *ObjDesc; |
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366 | ACPI_GPE_EVENT_INFO *GpeInfo; |
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367 | UINT32 i; |
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368 | |||
369 | |||
370 | ACPI_FUNCTION_ENTRY (); |
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371 | |||
372 | |||
373 | /* A NULL GpeDevice means use the FADT-defined GPE block(s) */ |
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374 | |||
375 | if (!GpeDevice) |
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376 | { |
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377 | /* Examine GPE Block 0 and 1 (These blocks are permanent) */ |
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378 | |||
379 | for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) |
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380 | { |
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381 | GpeInfo = AcpiEvLowGetGpeInfo (GpeNumber, |
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382 | AcpiGbl_GpeFadtBlocks[i]); |
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383 | if (GpeInfo) |
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384 | { |
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385 | return (GpeInfo); |
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386 | } |
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387 | } |
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388 | |||
389 | /* The GpeNumber was not in the range of either FADT GPE block */ |
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390 | |||
391 | return (NULL); |
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392 | } |
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393 | |||
394 | /* A Non-NULL GpeDevice means this is a GPE Block Device */ |
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395 | |||
396 | ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice); |
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397 | if (!ObjDesc || |
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398 | !ObjDesc->Device.GpeBlock) |
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399 | { |
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400 | return (NULL); |
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401 | } |
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402 | |||
403 | return (AcpiEvLowGetGpeInfo (GpeNumber, ObjDesc->Device.GpeBlock)); |
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404 | } |
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405 | |||
406 | |||
407 | /******************************************************************************* |
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408 | * |
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409 | * FUNCTION: AcpiEvGpeDetect |
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410 | * |
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411 | * PARAMETERS: GpeXruptList - Interrupt block for this interrupt. |
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412 | * Can have multiple GPE blocks attached. |
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413 | * |
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414 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
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415 | * |
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416 | * DESCRIPTION: Detect if any GP events have occurred. This function is |
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417 | * executed at interrupt level. |
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418 | * |
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419 | ******************************************************************************/ |
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420 | |||
421 | UINT32 |
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422 | AcpiEvGpeDetect ( |
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423 | ACPI_GPE_XRUPT_INFO *GpeXruptList) |
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424 | { |
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425 | ACPI_STATUS Status; |
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426 | ACPI_GPE_BLOCK_INFO *GpeBlock; |
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427 | ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; |
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428 | UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; |
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429 | UINT8 EnabledStatusByte; |
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430 | UINT32 StatusReg; |
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431 | UINT32 EnableReg; |
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432 | ACPI_CPU_FLAGS Flags; |
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433 | UINT32 i; |
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434 | UINT32 j; |
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435 | |||
436 | |||
437 | ACPI_FUNCTION_NAME (EvGpeDetect); |
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438 | |||
439 | /* Check for the case where there are no GPEs */ |
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440 | |||
441 | if (!GpeXruptList) |
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442 | { |
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443 | return (IntStatus); |
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444 | } |
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445 | |||
446 | /* |
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447 | * We need to obtain the GPE lock for both the data structs and registers |
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448 | * Note: Not necessary to obtain the hardware lock, since the GPE |
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449 | * registers are owned by the GpeLock. |
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450 | */ |
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451 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
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452 | |||
453 | /* Examine all GPE blocks attached to this interrupt level */ |
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454 | |||
455 | GpeBlock = GpeXruptList->GpeBlockListHead; |
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456 | while (GpeBlock) |
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457 | { |
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458 | /* |
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459 | * Read all of the 8-bit GPE status and enable registers in this GPE |
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460 | * block, saving all of them. Find all currently active GP events. |
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461 | */ |
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462 | for (i = 0; i < GpeBlock->RegisterCount; i++) |
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463 | { |
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464 | /* Get the next status/enable pair */ |
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465 | |||
466 | GpeRegisterInfo = &GpeBlock->RegisterInfo[i]; |
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467 | |||
468 | /* Read the Status Register */ |
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469 | |||
470 | Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress); |
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471 | if (ACPI_FAILURE (Status)) |
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472 | { |
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473 | goto UnlockAndExit; |
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474 | } |
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475 | |||
476 | /* Read the Enable Register */ |
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477 | |||
478 | Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress); |
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479 | if (ACPI_FAILURE (Status)) |
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480 | { |
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481 | goto UnlockAndExit; |
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482 | } |
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483 | |||
484 | ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, |
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485 | "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n", |
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486 | GpeRegisterInfo->BaseGpeNumber, StatusReg, EnableReg)); |
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487 | |||
488 | /* Check if there is anything active at all in this register */ |
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489 | |||
490 | EnabledStatusByte = (UINT8) (StatusReg & EnableReg); |
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491 | if (!EnabledStatusByte) |
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492 | { |
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493 | /* No active GPEs in this register, move on */ |
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494 | |||
495 | continue; |
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496 | } |
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497 | |||
498 | /* Now look at the individual GPEs in this byte register */ |
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499 | |||
500 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) |
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501 | { |
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502 | /* Examine one GPE bit */ |
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503 | |||
504 | if (EnabledStatusByte & (1 << j)) |
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505 | { |
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506 | /* |
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507 | * Found an active GPE. Dispatch the event to a handler |
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508 | * or method. |
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509 | */ |
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510 | IntStatus |= AcpiEvGpeDispatch ( |
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511 | &GpeBlock->EventInfo[((ACPI_SIZE) i * |
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512 | ACPI_GPE_REGISTER_WIDTH) + j], |
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513 | j + GpeRegisterInfo->BaseGpeNumber); |
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514 | } |
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515 | } |
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516 | } |
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517 | |||
518 | GpeBlock = GpeBlock->Next; |
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519 | } |
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520 | |||
521 | UnlockAndExit: |
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522 | |||
523 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
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524 | return (IntStatus); |
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525 | } |
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526 | |||
527 | |||
528 | /******************************************************************************* |
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529 | * |
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530 | * FUNCTION: AcpiEvAsynchExecuteGpeMethod |
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531 | * |
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532 | * PARAMETERS: Context (GpeEventInfo) - Info for this GPE |
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533 | * |
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534 | * RETURN: None |
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535 | * |
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536 | * DESCRIPTION: Perform the actual execution of a GPE control method. This |
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537 | * function is called from an invocation of AcpiOsExecute and |
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538 | * therefore does NOT execute at interrupt level - so that |
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539 | * the control method itself is not executed in the context of |
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540 | * an interrupt handler. |
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541 | * |
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542 | ******************************************************************************/ |
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543 | |||
544 | static void ACPI_SYSTEM_XFACE |
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545 | AcpiEvAsynchExecuteGpeMethod ( |
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546 | void *Context) |
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547 | { |
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548 | ACPI_GPE_EVENT_INFO *GpeEventInfo = Context; |
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549 | ACPI_STATUS Status; |
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550 | ACPI_GPE_EVENT_INFO *LocalGpeEventInfo; |
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551 | ACPI_EVALUATE_INFO *Info; |
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552 | |||
553 | |||
554 | ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod); |
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555 | |||
556 | |||
557 | /* Allocate a local GPE block */ |
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558 | |||
559 | LocalGpeEventInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_EVENT_INFO)); |
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560 | if (!LocalGpeEventInfo) |
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561 | { |
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562 | ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY, |
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563 | "while handling a GPE")); |
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564 | return_VOID; |
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565 | } |
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566 | |||
567 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
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568 | if (ACPI_FAILURE (Status)) |
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569 | { |
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570 | return_VOID; |
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571 | } |
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572 | |||
573 | /* Must revalidate the GpeNumber/GpeBlock */ |
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574 | |||
575 | if (!AcpiEvValidGpeEvent (GpeEventInfo)) |
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576 | { |
||
577 | Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
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578 | return_VOID; |
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579 | } |
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580 | |||
581 | /* Update the GPE register masks for return to enabled state */ |
||
582 | |||
583 | (void) AcpiEvUpdateGpeEnableMasks (GpeEventInfo); |
||
584 | |||
585 | /* |
||
586 | * Take a snapshot of the GPE info for this level - we copy the info to |
||
587 | * prevent a race condition with RemoveHandler/RemoveBlock. |
||
588 | */ |
||
589 | ACPI_MEMCPY (LocalGpeEventInfo, GpeEventInfo, |
||
590 | sizeof (ACPI_GPE_EVENT_INFO)); |
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591 | |||
592 | Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
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593 | if (ACPI_FAILURE (Status)) |
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594 | { |
||
595 | return_VOID; |
||
596 | } |
||
597 | |||
598 | /* |
||
599 | * Must check for control method type dispatch one more time to avoid a |
||
600 | * race with EvGpeInstallHandler |
||
601 | */ |
||
602 | if ((LocalGpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == |
||
603 | ACPI_GPE_DISPATCH_METHOD) |
||
604 | { |
||
605 | /* Allocate the evaluation information block */ |
||
606 | |||
607 | Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); |
||
608 | if (!Info) |
||
609 | { |
||
610 | Status = AE_NO_MEMORY; |
||
611 | } |
||
612 | else |
||
613 | { |
||
614 | /* |
||
615 | * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx |
||
616 | * control method that corresponds to this GPE |
||
617 | */ |
||
618 | Info->PrefixNode = LocalGpeEventInfo->Dispatch.MethodNode; |
||
619 | Info->Flags = ACPI_IGNORE_RETURN_VALUE; |
||
620 | |||
621 | Status = AcpiNsEvaluate (Info); |
||
622 | ACPI_FREE (Info); |
||
623 | } |
||
624 | |||
625 | if (ACPI_FAILURE (Status)) |
||
626 | { |
||
627 | ACPI_EXCEPTION ((AE_INFO, Status, |
||
628 | "while evaluating GPE method [%4.4s]", |
||
629 | AcpiUtGetNodeName (LocalGpeEventInfo->Dispatch.MethodNode))); |
||
630 | } |
||
631 | } |
||
632 | |||
633 | /* Defer enabling of GPE until all notify handlers are done */ |
||
634 | |||
635 | Status = AcpiOsExecute (OSL_NOTIFY_HANDLER, |
||
636 | AcpiEvAsynchEnableGpe, LocalGpeEventInfo); |
||
637 | if (ACPI_FAILURE (Status)) |
||
638 | { |
||
639 | ACPI_FREE (LocalGpeEventInfo); |
||
640 | } |
||
641 | return_VOID; |
||
642 | } |
||
643 | |||
644 | |||
645 | /******************************************************************************* |
||
646 | * |
||
647 | * FUNCTION: AcpiEvAsynchEnableGpe |
||
648 | * |
||
649 | * PARAMETERS: Context (GpeEventInfo) - Info for this GPE |
||
650 | * |
||
651 | * RETURN: None |
||
652 | * |
||
653 | * DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to |
||
654 | * complete (i.e., finish execution of Notify) |
||
655 | * |
||
656 | ******************************************************************************/ |
||
657 | |||
658 | static void ACPI_SYSTEM_XFACE |
||
659 | AcpiEvAsynchEnableGpe ( |
||
660 | void *Context) |
||
661 | { |
||
662 | ACPI_GPE_EVENT_INFO *GpeEventInfo = Context; |
||
663 | ACPI_STATUS Status; |
||
664 | |||
665 | |||
666 | if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
||
667 | ACPI_GPE_LEVEL_TRIGGERED) |
||
668 | { |
||
669 | /* |
||
670 | * GPE is level-triggered, we clear the GPE status bit after handling |
||
671 | * the event. |
||
672 | */ |
||
673 | Status = AcpiHwClearGpe (GpeEventInfo); |
||
674 | if (ACPI_FAILURE (Status)) |
||
675 | { |
||
676 | goto Exit; |
||
677 | } |
||
678 | } |
||
679 | |||
680 | /* Enable this GPE */ |
||
681 | |||
682 | (void) AcpiHwWriteGpeEnableReg (GpeEventInfo); |
||
683 | |||
684 | Exit: |
||
685 | ACPI_FREE (GpeEventInfo); |
||
686 | return; |
||
687 | } |
||
688 | |||
689 | |||
690 | /******************************************************************************* |
||
691 | * |
||
692 | * FUNCTION: AcpiEvGpeDispatch |
||
693 | * |
||
694 | * PARAMETERS: GpeEventInfo - Info for this GPE |
||
695 | * GpeNumber - Number relative to the parent GPE block |
||
696 | * |
||
697 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
||
698 | * |
||
699 | * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) |
||
700 | * or method (e.g. _Lxx/_Exx) handler. |
||
701 | * |
||
702 | * This function executes at interrupt level. |
||
703 | * |
||
704 | ******************************************************************************/ |
||
705 | |||
706 | UINT32 |
||
707 | AcpiEvGpeDispatch ( |
||
708 | ACPI_GPE_EVENT_INFO *GpeEventInfo, |
||
709 | UINT32 GpeNumber) |
||
710 | { |
||
711 | ACPI_STATUS Status; |
||
712 | |||
713 | |||
714 | ACPI_FUNCTION_TRACE (EvGpeDispatch); |
||
715 | |||
716 | |||
717 | AcpiGpeCount++; |
||
718 | |||
719 | /* |
||
720 | * If edge-triggered, clear the GPE status bit now. Note that |
||
721 | * level-triggered events are cleared after the GPE is serviced. |
||
722 | */ |
||
723 | if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
||
724 | ACPI_GPE_EDGE_TRIGGERED) |
||
725 | { |
||
726 | Status = AcpiHwClearGpe (GpeEventInfo); |
||
727 | if (ACPI_FAILURE (Status)) |
||
728 | { |
||
729 | ACPI_EXCEPTION ((AE_INFO, Status, |
||
730 | "Unable to clear GPE[0x%2X]", GpeNumber)); |
||
731 | return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); |
||
732 | } |
||
733 | } |
||
734 | |||
735 | /* |
||
736 | * Dispatch the GPE to either an installed handler, or the control method |
||
737 | * associated with this GPE (_Lxx or _Exx). If a handler exists, we invoke |
||
738 | * it and do not attempt to run the method. If there is neither a handler |
||
739 | * nor a method, we disable this GPE to prevent further such pointless |
||
740 | * events from firing. |
||
741 | */ |
||
742 | switch (GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) |
||
743 | { |
||
744 | case ACPI_GPE_DISPATCH_HANDLER: |
||
745 | |||
746 | /* |
||
747 | * Invoke the installed handler (at interrupt level) |
||
748 | * Ignore return status for now. |
||
749 | * TBD: leave GPE disabled on error? |
||
750 | */ |
||
751 | (void) GpeEventInfo->Dispatch.Handler->Address ( |
||
752 | GpeEventInfo->Dispatch.Handler->Context); |
||
753 | |||
754 | /* It is now safe to clear level-triggered events. */ |
||
755 | |||
756 | if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
||
757 | ACPI_GPE_LEVEL_TRIGGERED) |
||
758 | { |
||
759 | Status = AcpiHwClearGpe (GpeEventInfo); |
||
760 | if (ACPI_FAILURE (Status)) |
||
761 | { |
||
762 | ACPI_EXCEPTION ((AE_INFO, Status, |
||
763 | "Unable to clear GPE[0x%2X]", GpeNumber)); |
||
764 | return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); |
||
765 | } |
||
766 | } |
||
767 | break; |
||
768 | |||
769 | case ACPI_GPE_DISPATCH_METHOD: |
||
770 | |||
771 | /* |
||
772 | * Disable the GPE, so it doesn't keep firing before the method has a |
||
773 | * chance to run (it runs asynchronously with interrupts enabled). |
||
774 | */ |
||
775 | Status = AcpiEvDisableGpe (GpeEventInfo); |
||
776 | if (ACPI_FAILURE (Status)) |
||
777 | { |
||
778 | ACPI_EXCEPTION ((AE_INFO, Status, |
||
779 | "Unable to disable GPE[0x%2X]", GpeNumber)); |
||
780 | return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); |
||
781 | } |
||
782 | |||
783 | /* |
||
784 | * Execute the method associated with the GPE |
||
785 | * NOTE: Level-triggered GPEs are cleared after the method completes. |
||
786 | */ |
||
787 | Status = AcpiOsExecute (OSL_GPE_HANDLER, |
||
788 | AcpiEvAsynchExecuteGpeMethod, GpeEventInfo); |
||
789 | if (ACPI_FAILURE (Status)) |
||
790 | { |
||
791 | ACPI_EXCEPTION ((AE_INFO, Status, |
||
792 | "Unable to queue handler for GPE[0x%2X] - event disabled", |
||
793 | GpeNumber)); |
||
794 | } |
||
795 | break; |
||
796 | |||
797 | default: |
||
798 | |||
799 | /* |
||
800 | * No handler or method to run! |
||
801 | * 03/2010: This case should no longer be possible. We will not allow |
||
802 | * a GPE to be enabled if it has no handler or method. |
||
803 | */ |
||
804 | ACPI_ERROR ((AE_INFO, |
||
805 | "No handler or method for GPE[0x%2X], disabling event", |
||
806 | GpeNumber)); |
||
807 | |||
808 | /* |
||
809 | * Disable the GPE. The GPE will remain disabled a handler |
||
810 | * is installed or ACPICA is restarted. |
||
811 | */ |
||
812 | Status = AcpiEvDisableGpe (GpeEventInfo); |
||
813 | if (ACPI_FAILURE (Status)) |
||
814 | { |
||
815 | ACPI_EXCEPTION ((AE_INFO, Status, |
||
816 | "Unable to disable GPE[0x%2X]", GpeNumber)); |
||
817 | return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); |
||
818 | } |
||
819 | break; |
||
820 | } |
||
821 | |||
822 | return_UINT32 (ACPI_INTERRUPT_HANDLED); |
||
823 | }><>>>>>><> |
||
824 |