hwgpe.c revision 71867
1 2/****************************************************************************** 3 * 4 * Module Name: hwgpe - Low level GPE enable/disable/clear functions 5 * $Revision: 28 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 * 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 "achware.h" 120#include "acnamesp.h" 121#include "acevents.h" 122 123#define _COMPONENT HARDWARE 124 MODULE_NAME ("hwgpe") 125 126 127/****************************************************************************** 128 * 129 * FUNCTION: AcpiHwEnableGpe 130 * 131 * PARAMETERS: GpeNumber - The GPE 132 * 133 * RETURN: None 134 * 135 * DESCRIPTION: Enable a single GPE. 136 * 137 ******************************************************************************/ 138 139void 140AcpiHwEnableGpe ( 141 UINT32 GpeNumber) 142{ 143 UINT8 InByte; 144 UINT32 RegisterIndex; 145 UINT8 BitMask; 146 147 /* 148 * Translate GPE number to index into global registers array. 149 */ 150 RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; 151 152 /* 153 * Figure out the bit offset for this GPE within the target register. 154 */ 155 BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; 156 157 /* 158 * Read the current value of the register, set the appropriate bit 159 * to enable the GPE, and write out the new register. 160 */ 161 InByte = AcpiOsIn8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr); 162 AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, 163 (UINT8)(InByte | BitMask)); 164} 165 166 167/****************************************************************************** 168 * 169 * FUNCTION: AcpiHwDisableGpe 170 * 171 * PARAMETERS: GpeNumber - The GPE 172 * 173 * RETURN: None 174 * 175 * DESCRIPTION: Disable a single GPE. 176 * 177 ******************************************************************************/ 178 179void 180AcpiHwDisableGpe ( 181 UINT32 GpeNumber) 182{ 183 UINT8 InByte; 184 UINT32 RegisterIndex; 185 UINT8 BitMask; 186 187 /* 188 * Translate GPE number to index into global registers array. 189 */ 190 RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; 191 192 /* 193 * Figure out the bit offset for this GPE within the target register. 194 */ 195 BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; 196 197 /* 198 * Read the current value of the register, clear the appropriate bit, 199 * and write out the new register value to disable the GPE. 200 */ 201 InByte = AcpiOsIn8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr); 202 AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, 203 (UINT8)(InByte & ~BitMask)); 204} 205 206 207/****************************************************************************** 208 * 209 * FUNCTION: AcpiHwClearGpe 210 * 211 * PARAMETERS: GpeNumber - The GPE 212 * 213 * RETURN: None 214 * 215 * DESCRIPTION: Clear a single GPE. 216 * 217 ******************************************************************************/ 218 219void 220AcpiHwClearGpe ( 221 UINT32 GpeNumber) 222{ 223 UINT32 RegisterIndex; 224 UINT8 BitMask; 225 226 /* 227 * Translate GPE number to index into global registers array. 228 */ 229 RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; 230 231 /* 232 * Figure out the bit offset for this GPE within the target register. 233 */ 234 BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; 235 236 /* 237 * Write a one to the appropriate bit in the status register to 238 * clear this GPE. 239 */ 240 AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, BitMask); 241} 242 243 244/****************************************************************************** 245 * 246 * FUNCTION: AcpiHwGetGpeStatus 247 * 248 * PARAMETERS: GpeNumber - The GPE 249 * 250 * RETURN: None 251 * 252 * DESCRIPTION: Return the status of a single GPE. 253 * 254 ******************************************************************************/ 255 256void 257AcpiHwGetGpeStatus ( 258 UINT32 GpeNumber, 259 ACPI_EVENT_STATUS *EventStatus) 260{ 261 UINT8 InByte = 0; 262 UINT32 RegisterIndex = 0; 263 UINT8 BitMask = 0; 264 265 if (!EventStatus) 266 { 267 return; 268 } 269 270 (*EventStatus) = 0; 271 272 /* 273 * Translate GPE number to index into global registers array. 274 */ 275 RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; 276 277 /* 278 * Figure out the bit offset for this GPE within the target register. 279 */ 280 BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; 281 282 /* 283 * Enabled?: 284 */ 285 InByte = AcpiOsIn8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr); 286 287 if (BitMask & InByte) 288 { 289 (*EventStatus) |= ACPI_EVENT_FLAG_ENABLED; 290 } 291 292 /* 293 * Set? 294 */ 295 InByte = AcpiOsIn8 (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr); 296 297 if (BitMask & InByte) 298 { 299 (*EventStatus) |= ACPI_EVENT_FLAG_SET; 300 } 301} 302