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1498 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: evgpeblk - GPE block creation and initialization. |
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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 ("evgpeblk") |
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123 | |||
124 | /* Local prototypes */ |
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125 | |||
126 | static ACPI_STATUS |
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127 | AcpiEvInstallGpeBlock ( |
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128 | ACPI_GPE_BLOCK_INFO *GpeBlock, |
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129 | UINT32 InterruptNumber); |
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130 | |||
131 | static ACPI_STATUS |
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132 | AcpiEvCreateGpeInfoBlocks ( |
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133 | ACPI_GPE_BLOCK_INFO *GpeBlock); |
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134 | |||
135 | |||
136 | /******************************************************************************* |
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137 | * |
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138 | * FUNCTION: AcpiEvInstallGpeBlock |
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139 | * |
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140 | * PARAMETERS: GpeBlock - New GPE block |
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141 | * InterruptNumber - Xrupt to be associated with this |
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142 | * GPE block |
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143 | * |
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144 | * RETURN: Status |
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145 | * |
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146 | * DESCRIPTION: Install new GPE block with mutex support |
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147 | * |
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148 | ******************************************************************************/ |
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149 | |||
150 | static ACPI_STATUS |
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151 | AcpiEvInstallGpeBlock ( |
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152 | ACPI_GPE_BLOCK_INFO *GpeBlock, |
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153 | UINT32 InterruptNumber) |
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154 | { |
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155 | ACPI_GPE_BLOCK_INFO *NextGpeBlock; |
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156 | ACPI_GPE_XRUPT_INFO *GpeXruptBlock; |
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157 | ACPI_STATUS Status; |
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158 | ACPI_CPU_FLAGS Flags; |
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159 | |||
160 | |||
161 | ACPI_FUNCTION_TRACE (EvInstallGpeBlock); |
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162 | |||
163 | |||
164 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
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165 | if (ACPI_FAILURE (Status)) |
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166 | { |
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167 | return_ACPI_STATUS (Status); |
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168 | } |
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169 | |||
170 | GpeXruptBlock = AcpiEvGetGpeXruptBlock (InterruptNumber); |
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171 | if (!GpeXruptBlock) |
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172 | { |
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173 | Status = AE_NO_MEMORY; |
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174 | goto UnlockAndExit; |
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175 | } |
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176 | |||
177 | /* Install the new block at the end of the list with lock */ |
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178 | |||
179 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
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180 | if (GpeXruptBlock->GpeBlockListHead) |
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181 | { |
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182 | NextGpeBlock = GpeXruptBlock->GpeBlockListHead; |
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183 | while (NextGpeBlock->Next) |
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184 | { |
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185 | NextGpeBlock = NextGpeBlock->Next; |
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186 | } |
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187 | |||
188 | NextGpeBlock->Next = GpeBlock; |
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189 | GpeBlock->Previous = NextGpeBlock; |
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190 | } |
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191 | else |
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192 | { |
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193 | GpeXruptBlock->GpeBlockListHead = GpeBlock; |
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194 | } |
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195 | |||
196 | GpeBlock->XruptBlock = GpeXruptBlock; |
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197 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
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198 | |||
199 | |||
200 | UnlockAndExit: |
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201 | Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
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202 | return_ACPI_STATUS (Status); |
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203 | } |
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204 | |||
205 | |||
206 | /******************************************************************************* |
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207 | * |
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208 | * FUNCTION: AcpiEvDeleteGpeBlock |
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209 | * |
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210 | * PARAMETERS: GpeBlock - Existing GPE block |
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211 | * |
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212 | * RETURN: Status |
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213 | * |
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214 | * DESCRIPTION: Remove a GPE block |
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215 | * |
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216 | ******************************************************************************/ |
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217 | |||
218 | ACPI_STATUS |
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219 | AcpiEvDeleteGpeBlock ( |
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220 | ACPI_GPE_BLOCK_INFO *GpeBlock) |
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221 | { |
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222 | ACPI_STATUS Status; |
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223 | ACPI_CPU_FLAGS Flags; |
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224 | |||
225 | |||
226 | ACPI_FUNCTION_TRACE (EvInstallGpeBlock); |
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227 | |||
228 | |||
229 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
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230 | if (ACPI_FAILURE (Status)) |
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231 | { |
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232 | return_ACPI_STATUS (Status); |
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233 | } |
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234 | |||
235 | /* Disable all GPEs in this block */ |
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236 | |||
237 | Status = AcpiHwDisableGpeBlock (GpeBlock->XruptBlock, GpeBlock, NULL); |
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238 | |||
239 | if (!GpeBlock->Previous && !GpeBlock->Next) |
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240 | { |
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241 | /* This is the last GpeBlock on this interrupt */ |
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242 | |||
243 | Status = AcpiEvDeleteGpeXrupt (GpeBlock->XruptBlock); |
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244 | if (ACPI_FAILURE (Status)) |
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245 | { |
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246 | goto UnlockAndExit; |
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247 | } |
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248 | } |
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249 | else |
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250 | { |
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251 | /* Remove the block on this interrupt with lock */ |
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252 | |||
253 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
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254 | if (GpeBlock->Previous) |
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255 | { |
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256 | GpeBlock->Previous->Next = GpeBlock->Next; |
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257 | } |
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258 | else |
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259 | { |
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260 | GpeBlock->XruptBlock->GpeBlockListHead = GpeBlock->Next; |
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261 | } |
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262 | |||
263 | if (GpeBlock->Next) |
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264 | { |
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265 | GpeBlock->Next->Previous = GpeBlock->Previous; |
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266 | } |
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267 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
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268 | } |
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269 | |||
270 | AcpiCurrentGpeCount -= GpeBlock->GpeCount; |
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271 | |||
272 | /* Free the GpeBlock */ |
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273 | |||
274 | ACPI_FREE (GpeBlock->RegisterInfo); |
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275 | ACPI_FREE (GpeBlock->EventInfo); |
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276 | ACPI_FREE (GpeBlock); |
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277 | |||
278 | UnlockAndExit: |
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279 | Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
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280 | return_ACPI_STATUS (Status); |
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281 | } |
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282 | |||
283 | |||
284 | /******************************************************************************* |
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285 | * |
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286 | * FUNCTION: AcpiEvCreateGpeInfoBlocks |
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287 | * |
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288 | * PARAMETERS: GpeBlock - New GPE block |
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289 | * |
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290 | * RETURN: Status |
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291 | * |
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292 | * DESCRIPTION: Create the RegisterInfo and EventInfo blocks for this GPE block |
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293 | * |
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294 | ******************************************************************************/ |
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295 | |||
296 | static ACPI_STATUS |
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297 | AcpiEvCreateGpeInfoBlocks ( |
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298 | ACPI_GPE_BLOCK_INFO *GpeBlock) |
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299 | { |
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300 | ACPI_GPE_REGISTER_INFO *GpeRegisterInfo = NULL; |
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301 | ACPI_GPE_EVENT_INFO *GpeEventInfo = NULL; |
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302 | ACPI_GPE_EVENT_INFO *ThisEvent; |
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303 | ACPI_GPE_REGISTER_INFO *ThisRegister; |
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304 | UINT32 i; |
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305 | UINT32 j; |
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306 | ACPI_STATUS Status; |
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307 | |||
308 | |||
309 | ACPI_FUNCTION_TRACE (EvCreateGpeInfoBlocks); |
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310 | |||
311 | |||
312 | /* Allocate the GPE register information block */ |
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313 | |||
314 | GpeRegisterInfo = ACPI_ALLOCATE_ZEROED ( |
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315 | (ACPI_SIZE) GpeBlock->RegisterCount * |
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316 | sizeof (ACPI_GPE_REGISTER_INFO)); |
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317 | if (!GpeRegisterInfo) |
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318 | { |
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319 | ACPI_ERROR ((AE_INFO, |
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320 | "Could not allocate the GpeRegisterInfo table")); |
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321 | return_ACPI_STATUS (AE_NO_MEMORY); |
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322 | } |
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323 | |||
324 | /* |
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325 | * Allocate the GPE EventInfo block. There are eight distinct GPEs |
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326 | * per register. Initialization to zeros is sufficient. |
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327 | */ |
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328 | GpeEventInfo = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) GpeBlock->GpeCount * |
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329 | sizeof (ACPI_GPE_EVENT_INFO)); |
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330 | if (!GpeEventInfo) |
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331 | { |
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332 | ACPI_ERROR ((AE_INFO, |
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333 | "Could not allocate the GpeEventInfo table")); |
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334 | Status = AE_NO_MEMORY; |
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335 | goto ErrorExit; |
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336 | } |
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337 | |||
338 | /* Save the new Info arrays in the GPE block */ |
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339 | |||
340 | GpeBlock->RegisterInfo = GpeRegisterInfo; |
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341 | GpeBlock->EventInfo = GpeEventInfo; |
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342 | |||
343 | /* |
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344 | * Initialize the GPE Register and Event structures. A goal of these |
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345 | * tables is to hide the fact that there are two separate GPE register |
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346 | * sets in a given GPE hardware block, the status registers occupy the |
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347 | * first half, and the enable registers occupy the second half. |
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348 | */ |
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349 | ThisRegister = GpeRegisterInfo; |
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350 | ThisEvent = GpeEventInfo; |
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351 | |||
352 | for (i = 0; i < GpeBlock->RegisterCount; i++) |
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353 | { |
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354 | /* Init the RegisterInfo for this GPE register (8 GPEs) */ |
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355 | |||
356 | ThisRegister->BaseGpeNumber = (UINT8) (GpeBlock->BlockBaseNumber + |
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357 | (i * ACPI_GPE_REGISTER_WIDTH)); |
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358 | |||
359 | ThisRegister->StatusAddress.Address = |
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360 | GpeBlock->BlockAddress.Address + i; |
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361 | |||
362 | ThisRegister->EnableAddress.Address = |
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363 | GpeBlock->BlockAddress.Address + i + GpeBlock->RegisterCount; |
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364 | |||
365 | ThisRegister->StatusAddress.SpaceId = GpeBlock->BlockAddress.SpaceId; |
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366 | ThisRegister->EnableAddress.SpaceId = GpeBlock->BlockAddress.SpaceId; |
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367 | ThisRegister->StatusAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH; |
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368 | ThisRegister->EnableAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH; |
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369 | ThisRegister->StatusAddress.BitOffset = 0; |
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370 | ThisRegister->EnableAddress.BitOffset = 0; |
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371 | |||
372 | /* Init the EventInfo for each GPE within this register */ |
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373 | |||
374 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) |
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375 | { |
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376 | ThisEvent->GpeNumber = (UINT8) (ThisRegister->BaseGpeNumber + j); |
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377 | ThisEvent->RegisterInfo = ThisRegister; |
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378 | ThisEvent++; |
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379 | } |
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380 | |||
381 | /* Disable all GPEs within this register */ |
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382 | |||
383 | Status = AcpiHwWrite (0x00, &ThisRegister->EnableAddress); |
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384 | if (ACPI_FAILURE (Status)) |
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385 | { |
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386 | goto ErrorExit; |
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387 | } |
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388 | |||
389 | /* Clear any pending GPE events within this register */ |
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390 | |||
391 | Status = AcpiHwWrite (0xFF, &ThisRegister->StatusAddress); |
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392 | if (ACPI_FAILURE (Status)) |
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393 | { |
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394 | goto ErrorExit; |
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395 | } |
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396 | |||
397 | ThisRegister++; |
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398 | } |
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399 | |||
400 | return_ACPI_STATUS (AE_OK); |
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401 | |||
402 | |||
403 | ErrorExit: |
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404 | if (GpeRegisterInfo) |
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405 | { |
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406 | ACPI_FREE (GpeRegisterInfo); |
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407 | } |
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408 | if (GpeEventInfo) |
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409 | { |
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410 | ACPI_FREE (GpeEventInfo); |
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411 | } |
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412 | |||
413 | return_ACPI_STATUS (Status); |
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414 | } |
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415 | |||
416 | |||
417 | /******************************************************************************* |
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418 | * |
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419 | * FUNCTION: AcpiEvCreateGpeBlock |
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420 | * |
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421 | * PARAMETERS: GpeDevice - Handle to the parent GPE block |
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422 | * GpeBlockAddress - Address and SpaceID |
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423 | * RegisterCount - Number of GPE register pairs in the block |
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424 | * GpeBlockBaseNumber - Starting GPE number for the block |
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425 | * InterruptNumber - H/W interrupt for the block |
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426 | * ReturnGpeBlock - Where the new block descriptor is returned |
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427 | * |
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428 | * RETURN: Status |
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429 | * |
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430 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
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431 | * the block are disabled at exit. |
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432 | * Note: Assumes namespace is locked. |
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433 | * |
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434 | ******************************************************************************/ |
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435 | |||
436 | ACPI_STATUS |
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437 | AcpiEvCreateGpeBlock ( |
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438 | ACPI_NAMESPACE_NODE *GpeDevice, |
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439 | ACPI_GENERIC_ADDRESS *GpeBlockAddress, |
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440 | UINT32 RegisterCount, |
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441 | UINT8 GpeBlockBaseNumber, |
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442 | UINT32 InterruptNumber, |
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443 | ACPI_GPE_BLOCK_INFO **ReturnGpeBlock) |
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444 | { |
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445 | ACPI_STATUS Status; |
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446 | ACPI_GPE_BLOCK_INFO *GpeBlock; |
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447 | ACPI_GPE_WALK_INFO WalkInfo; |
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448 | |||
449 | |||
450 | ACPI_FUNCTION_TRACE (EvCreateGpeBlock); |
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451 | |||
452 | |||
453 | if (!RegisterCount) |
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454 | { |
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455 | return_ACPI_STATUS (AE_OK); |
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456 | } |
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457 | |||
458 | /* Allocate a new GPE block */ |
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459 | |||
460 | GpeBlock = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_BLOCK_INFO)); |
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461 | if (!GpeBlock) |
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462 | { |
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463 | return_ACPI_STATUS (AE_NO_MEMORY); |
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464 | } |
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465 | |||
466 | /* Initialize the new GPE block */ |
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467 | |||
468 | GpeBlock->Node = GpeDevice; |
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469 | GpeBlock->GpeCount = (UINT16) (RegisterCount * ACPI_GPE_REGISTER_WIDTH); |
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470 | GpeBlock->RegisterCount = RegisterCount; |
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471 | GpeBlock->BlockBaseNumber = GpeBlockBaseNumber; |
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472 | |||
473 | ACPI_MEMCPY (&GpeBlock->BlockAddress, GpeBlockAddress, |
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474 | sizeof (ACPI_GENERIC_ADDRESS)); |
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475 | |||
476 | /* |
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477 | * Create the RegisterInfo and EventInfo sub-structures |
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478 | * Note: disables and clears all GPEs in the block |
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479 | */ |
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480 | Status = AcpiEvCreateGpeInfoBlocks (GpeBlock); |
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481 | if (ACPI_FAILURE (Status)) |
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482 | { |
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483 | ACPI_FREE (GpeBlock); |
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484 | return_ACPI_STATUS (Status); |
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485 | } |
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486 | |||
487 | /* Install the new block in the global lists */ |
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488 | |||
489 | Status = AcpiEvInstallGpeBlock (GpeBlock, InterruptNumber); |
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490 | if (ACPI_FAILURE (Status)) |
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491 | { |
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492 | ACPI_FREE (GpeBlock); |
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493 | return_ACPI_STATUS (Status); |
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494 | } |
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495 | |||
496 | /* Find all GPE methods (_Lxx or_Exx) for this block */ |
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497 | |||
498 | WalkInfo.GpeBlock = GpeBlock; |
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499 | WalkInfo.GpeDevice = GpeDevice; |
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500 | WalkInfo.EnableThisGpe = FALSE; |
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501 | WalkInfo.ExecuteByOwnerId = FALSE; |
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502 | |||
503 | Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD, GpeDevice, |
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504 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, |
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505 | AcpiEvMatchGpeMethod, NULL, &WalkInfo, NULL); |
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506 | |||
507 | /* Return the new block */ |
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508 | |||
509 | if (ReturnGpeBlock) |
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510 | { |
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511 | (*ReturnGpeBlock) = GpeBlock; |
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512 | } |
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513 | |||
514 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, |
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515 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", |
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516 | (UINT32) GpeBlock->BlockBaseNumber, |
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517 | (UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1)), |
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518 | GpeDevice->Name.Ascii, GpeBlock->RegisterCount, |
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519 | InterruptNumber)); |
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520 | |||
521 | /* Update global count of currently available GPEs */ |
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522 | |||
523 | AcpiCurrentGpeCount += GpeBlock->GpeCount; |
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524 | return_ACPI_STATUS (AE_OK); |
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525 | } |
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526 | |||
527 | |||
528 | /******************************************************************************* |
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529 | * |
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530 | * FUNCTION: AcpiEvInitializeGpeBlock |
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531 | * |
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532 | * PARAMETERS: GpeDevice - Handle to the parent GPE block |
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533 | * GpeBlock - Gpe Block info |
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534 | * |
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535 | * RETURN: Status |
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536 | * |
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537 | * DESCRIPTION: Initialize and enable a GPE block. First find and run any |
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538 | * _PRT methods associated with the block, then enable the |
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539 | * appropriate GPEs. |
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540 | * Note: Assumes namespace is locked. |
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541 | * |
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542 | ******************************************************************************/ |
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543 | |||
544 | ACPI_STATUS |
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545 | AcpiEvInitializeGpeBlock ( |
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546 | ACPI_NAMESPACE_NODE *GpeDevice, |
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547 | ACPI_GPE_BLOCK_INFO *GpeBlock) |
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548 | { |
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549 | ACPI_STATUS Status; |
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550 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
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551 | ACPI_GPE_WALK_INFO WalkInfo; |
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552 | UINT32 WakeGpeCount; |
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553 | UINT32 GpeEnabledCount; |
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554 | UINT32 GpeIndex; |
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555 | UINT32 GpeNumber; |
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556 | UINT32 i; |
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557 | UINT32 j; |
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558 | |||
559 | |||
560 | ACPI_FUNCTION_TRACE (EvInitializeGpeBlock); |
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561 | |||
562 | |||
563 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ |
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564 | |||
565 | if (!GpeBlock) |
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566 | { |
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567 | return_ACPI_STATUS (AE_OK); |
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568 | } |
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569 | |||
570 | /* |
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571 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
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572 | * is no, they should only be enabled just as the machine goes to sleep. |
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573 | */ |
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574 | if (AcpiGbl_LeaveWakeGpesDisabled) |
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575 | { |
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576 | /* |
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577 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
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578 | * Each GPE that has one or more _PRWs that reference it is by |
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579 | * definition a wake GPE and will not be enabled while the machine |
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580 | * is running. |
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581 | */ |
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582 | WalkInfo.GpeBlock = GpeBlock; |
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583 | WalkInfo.GpeDevice = GpeDevice; |
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584 | WalkInfo.ExecuteByOwnerId = FALSE; |
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585 | |||
586 | Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
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587 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, |
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588 | AcpiEvMatchPrwAndGpe, NULL, &WalkInfo, NULL); |
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589 | if (ACPI_FAILURE (Status)) |
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590 | { |
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591 | ACPI_EXCEPTION ((AE_INFO, Status, "While executing _PRW methods")); |
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592 | } |
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593 | } |
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594 | |||
595 | /* |
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596 | * Enable all GPEs that have a corresponding method and are not |
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597 | * capable of generating wakeups. Any other GPEs within this block |
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598 | * must be enabled via the AcpiEnableGpe interface. |
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599 | */ |
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600 | WakeGpeCount = 0; |
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601 | GpeEnabledCount = 0; |
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602 | |||
603 | if (GpeDevice == AcpiGbl_FadtGpeDevice) |
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604 | { |
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605 | GpeDevice = NULL; |
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606 | } |
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607 | |||
608 | for (i = 0; i < GpeBlock->RegisterCount; i++) |
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609 | { |
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610 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) |
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611 | { |
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612 | /* Get the info block for this particular GPE */ |
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613 | |||
614 | GpeIndex = (i * ACPI_GPE_REGISTER_WIDTH) + j; |
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615 | GpeEventInfo = &GpeBlock->EventInfo[GpeIndex]; |
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616 | |||
617 | /* Ignore GPEs that can wake the system */ |
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618 | |||
619 | if (GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE) |
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620 | { |
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621 | WakeGpeCount++; |
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622 | if (AcpiGbl_LeaveWakeGpesDisabled) |
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623 | { |
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624 | continue; |
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625 | } |
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626 | } |
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627 | |||
628 | /* Ignore GPEs that have no corresponding _Lxx/_Exx method */ |
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629 | |||
630 | if (!(GpeEventInfo->Flags & ACPI_GPE_DISPATCH_METHOD)) |
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631 | { |
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632 | continue; |
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633 | } |
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634 | |||
635 | /* Enable this GPE */ |
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636 | |||
637 | GpeNumber = GpeIndex + GpeBlock->BlockBaseNumber; |
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638 | Status = AcpiEnableGpe (GpeDevice, GpeNumber, |
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639 | ACPI_GPE_TYPE_RUNTIME); |
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640 | if (ACPI_FAILURE (Status)) |
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641 | { |
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642 | ACPI_EXCEPTION ((AE_INFO, Status, |
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643 | "Could not enable GPE 0x%02X", GpeNumber)); |
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644 | continue; |
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645 | } |
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646 | |||
647 | GpeEnabledCount++; |
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648 | } |
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649 | } |
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650 | |||
651 | if (GpeEnabledCount || WakeGpeCount) |
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652 | { |
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653 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, |
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654 | "Enabled %u Runtime GPEs, added %u Wake GPEs in this block\n", |
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655 | GpeEnabledCount, WakeGpeCount)); |
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656 | } |
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657 | |||
658 | return_ACPI_STATUS (AE_OK); |
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659 | }>>>> |
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660 |