1 /******************************************************************************* 2 * 3 * Module Name: evsci - System Control Interrupt configuration and 4 * legacy to ACPI mode state transition functions 5 * 6 ******************************************************************************/ 7 8 /****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118 #include "acpi.h" 119 #include "accommon.h" 120 #include "acevents.h" 121 122 123 #define _COMPONENT ACPI_EVENTS 124 ACPI_MODULE_NAME ("evsci") 125 126 /* Local prototypes */ 127 128 static UINT32 ACPI_SYSTEM_XFACE 129 AcpiEvSciXruptHandler ( 130 void *Context); 131 132 133 /******************************************************************************* 134 * 135 * FUNCTION: AcpiEvSciXruptHandler 136 * 137 * PARAMETERS: Context - Calling Context 138 * 139 * RETURN: Status code indicates whether interrupt was handled. 140 * 141 * DESCRIPTION: Interrupt handler that will figure out what function or 142 * control method to call to deal with a SCI. 143 * 144 ******************************************************************************/ 145 146 static UINT32 ACPI_SYSTEM_XFACE 147 AcpiEvSciXruptHandler ( 148 void *Context) 149 { 150 ACPI_GPE_XRUPT_INFO *GpeXruptList = Context; 151 UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED; 152 153 154 ACPI_FUNCTION_TRACE (EvSciXruptHandler); 155 156 157 /* 158 * We are guaranteed by the ACPI CA initialization/shutdown code that 159 * if this interrupt handler is installed, ACPI is enabled. 160 */ 161 162 /* 163 * Fixed Events: 164 * Check for and dispatch any Fixed Events that have occurred 165 */ 166 InterruptHandled |= AcpiEvFixedEventDetect (); 167 168 /* 169 * General Purpose Events: 170 * Check for and dispatch any GPEs that have occurred 171 */ 172 InterruptHandled |= AcpiEvGpeDetect (GpeXruptList); 173 174 AcpiSciCount++; 175 return_UINT32 (InterruptHandled); 176 } 177 178 179 /******************************************************************************* 180 * 181 * FUNCTION: AcpiEvGpeXruptHandler 182 * 183 * PARAMETERS: Context - Calling Context 184 * 185 * RETURN: Status code indicates whether interrupt was handled. 186 * 187 * DESCRIPTION: Handler for GPE Block Device interrupts 188 * 189 ******************************************************************************/ 190 191 UINT32 ACPI_SYSTEM_XFACE 192 AcpiEvGpeXruptHandler ( 193 void *Context) 194 { 195 ACPI_GPE_XRUPT_INFO *GpeXruptList = Context; 196 UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED; 197 198 199 ACPI_FUNCTION_TRACE (EvGpeXruptHandler); 200 201 202 /* 203 * We are guaranteed by the ACPI CA initialization/shutdown code that 204 * if this interrupt handler is installed, ACPI is enabled. 205 */ 206 207 /* GPEs: Check for and dispatch any GPEs that have occurred */ 208 209 InterruptHandled |= AcpiEvGpeDetect (GpeXruptList); 210 211 return_UINT32 (InterruptHandled); 212 } 213 214 215 /****************************************************************************** 216 * 217 * FUNCTION: AcpiEvInstallSciHandler 218 * 219 * PARAMETERS: none 220 * 221 * RETURN: Status 222 * 223 * DESCRIPTION: Installs SCI handler. 224 * 225 ******************************************************************************/ 226 227 UINT32 228 AcpiEvInstallSciHandler ( 229 void) 230 { 231 UINT32 Status = AE_OK; 232 233 234 ACPI_FUNCTION_TRACE (EvInstallSciHandler); 235 236 237 Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt, 238 AcpiEvSciXruptHandler, AcpiGbl_GpeXruptListHead); 239 return_ACPI_STATUS (Status); 240 } 241 242 243 /****************************************************************************** 244 * 245 * FUNCTION: AcpiEvRemoveSciHandler 246 * 247 * PARAMETERS: none 248 * 249 * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not 250 * installed to begin with 251 * 252 * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be 253 * taken. 254 * 255 * Note: It doesn't seem important to disable all events or set the event 256 * enable registers to their original values. The OS should disable 257 * the SCI interrupt level when the handler is removed, so no more 258 * events will come in. 259 * 260 ******************************************************************************/ 261 262 ACPI_STATUS 263 AcpiEvRemoveSciHandler ( 264 void) 265 { 266 ACPI_STATUS Status; 267 268 269 ACPI_FUNCTION_TRACE (EvRemoveSciHandler); 270 271 272 /* Just let the OS remove the handler and disable the level */ 273 274 Status = AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt, 275 AcpiEvSciXruptHandler); 276 277 return_ACPI_STATUS (Status); 278 } 279 280 281