1 /******************************************************************************* 2 * 3 * Module Name: evsci - System Control Interrupt configuration and 4 * legacy to ACPI mode state transition functions 5 * $Revision: 1.104 $ 6 * 7 ******************************************************************************/ 8 9 /****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2008, Intel Corp. 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 67 * make. 68 * 69 * 3.3. Redistribution of Executable. Redistribution in executable form of any 70 * substantial portion of the Covered Code or modification must reproduce the 71 * above Copyright Notice, and the following Disclaimer and Export Compliance 72 * provision in the documentation and/or other materials provided with the 73 * distribution. 74 * 75 * 3.4. Intel retains all right, title, and interest in and to the Original 76 * Intel Code. 77 * 78 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 79 * Intel shall be used in advertising or otherwise to promote the sale, use or 80 * other dealings in products derived from or relating to the Covered Code 81 * without prior written authorization from Intel. 82 * 83 * 4. Disclaimer and Export Compliance 84 * 85 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 86 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 87 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 88 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 89 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 90 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 91 * PARTICULAR PURPOSE. 92 * 93 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 94 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 95 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 96 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 97 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 98 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 99 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 100 * LIMITED REMEDY. 101 * 102 * 4.3. Licensee shall not export, either directly or indirectly, any of this 103 * software or system incorporating such software without first obtaining any 104 * required license or other approval from the U. S. Department of Commerce or 105 * any other agency or department of the United States Government. In the 106 * event Licensee exports any such software from the United States or 107 * re-exports any such software from a foreign destination, Licensee shall 108 * ensure that the distribution and export/re-export of the software is in 109 * compliance with all laws, regulations, orders, or other restrictions of the 110 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 111 * any of its subsidiaries will export/re-export any technical data, process, 112 * software, or service, directly or indirectly, to any country for which the 113 * United States government or any agency thereof requires an export license, 114 * other governmental approval, or letter of assurance, without first obtaining 115 * such license, approval or letter. 116 * 117 *****************************************************************************/ 118 119 #include "acpi.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 /* 208 * GPEs: 209 * Check for and dispatch any GPEs that have occurred 210 */ 211 InterruptHandled |= AcpiEvGpeDetect (GpeXruptList); 212 213 return_UINT32 (InterruptHandled); 214 } 215 216 217 /****************************************************************************** 218 * 219 * FUNCTION: AcpiEvInstallSciHandler 220 * 221 * PARAMETERS: none 222 * 223 * RETURN: Status 224 * 225 * DESCRIPTION: Installs SCI handler. 226 * 227 ******************************************************************************/ 228 229 UINT32 230 AcpiEvInstallSciHandler ( 231 void) 232 { 233 UINT32 Status = AE_OK; 234 235 236 ACPI_FUNCTION_TRACE (EvInstallSciHandler); 237 238 239 Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt, 240 AcpiEvSciXruptHandler, AcpiGbl_GpeXruptListHead); 241 return_ACPI_STATUS (Status); 242 } 243 244 245 /****************************************************************************** 246 * 247 * FUNCTION: AcpiEvRemoveSciHandler 248 * 249 * PARAMETERS: none 250 * 251 * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not 252 * installed to begin with 253 * 254 * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be 255 * taken. 256 * 257 * Note: It doesn't seem important to disable all events or set the event 258 * enable registers to their original values. The OS should disable 259 * the SCI interrupt level when the handler is removed, so no more 260 * events will come in. 261 * 262 ******************************************************************************/ 263 264 ACPI_STATUS 265 AcpiEvRemoveSciHandler ( 266 void) 267 { 268 ACPI_STATUS Status; 269 270 271 ACPI_FUNCTION_TRACE (EvRemoveSciHandler); 272 273 274 /* Just let the OS remove the handler and disable the level */ 275 276 Status = AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt, 277 AcpiEvSciXruptHandler); 278 279 return_ACPI_STATUS (Status); 280 } 281 282 283