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" 119 120#define _COMPONENT ACPI_HARDWARE 121 ACPI_MODULE_NAME ("hwtimer") 122 123 124/****************************************************************************** 125 * 126 * FUNCTION: AcpiGetTimerResolution 127 * 128 * PARAMETERS: none 129 * 130 * RETURN: Number of bits of resolution in the PM Timer (24 or 32). 131 * 132 * DESCRIPTION: Obtains resolution of the ACPI PM Timer. 133 * 134 ******************************************************************************/ 135 136ACPI_STATUS 137AcpiGetTimerResolution ( 138 UINT32 *Resolution) 139{ 140 ACPI_FUNCTION_TRACE ("AcpiGetTimerResolution"); 141 142 143 if (!Resolution) 144 { 145 return_ACPI_STATUS (AE_BAD_PARAMETER); 146 } 147 148 if (0 == AcpiGbl_FADT->TmrValExt) 149 { 150 *Resolution = 24; 151 } 152 else 153 { 154 *Resolution = 32; 155 } 156 157 return_ACPI_STATUS (AE_OK); 158} 159 160 161/****************************************************************************** 162 * 163 * FUNCTION: AcpiGetTimer 164 * 165 * PARAMETERS: none 166 * 167 * RETURN: Current value of the ACPI PM Timer (in ticks). 168 * 169 * DESCRIPTION: Obtains current value of ACPI PM Timer. 170 * 171 ******************************************************************************/ 172 173ACPI_STATUS 174AcpiGetTimer ( 175 UINT32 *Ticks) 176{ 177 ACPI_STATUS Status; 178 179 180 ACPI_FUNCTION_TRACE ("AcpiGetTimer"); 181 182 183 if (!Ticks) 184 { 185 return_ACPI_STATUS (AE_BAD_PARAMETER); 186 } 187 188 Status = AcpiHwLowLevelRead (32, Ticks, &AcpiGbl_FADT->XPmTmrBlk); 189 190 return_ACPI_STATUS (Status); 191} 192 193 194/****************************************************************************** 195 * 196 * FUNCTION: AcpiGetTimerDuration 197 * 198 * PARAMETERS: StartTicks 199 * EndTicks 200 * TimeElapsed 201 * 202 * RETURN: TimeElapsed 203 * 204 * DESCRIPTION: Computes the time elapsed (in microseconds) between two 205 * PM Timer time stamps, taking into account the possibility of 206 * rollovers, the timer resolution, and timer frequency. 207 * 208 * The PM Timer's clock ticks at roughly 3.6 times per 209 * _microsecond_, and its clock continues through Cx state 210 * transitions (unlike many CPU timestamp counters) -- making it 211 * a versatile and accurate timer. 212 * 213 * Note that this function accommodates only a single timer 214 * rollover. Thus for 24-bit timers, this function should only 215 * be used for calculating durations less than ~4.6 seconds 216 * (~20 minutes for 32-bit timers) -- calculations below 217 * 218 * 2**24 Ticks / 3,600,000 Ticks/Sec = 4.66 sec 219 * 2**32 Ticks / 3,600,000 Ticks/Sec = 1193 sec or 19.88 minutes 220 * 221 ******************************************************************************/ 222 223ACPI_STATUS 224AcpiGetTimerDuration ( 225 UINT32 StartTicks, 226 UINT32 EndTicks, 227 UINT32 *TimeElapsed) 228{ 229 UINT32 DeltaTicks = 0; 230 UINT64_OVERLAY NormalizedTicks; 231 ACPI_STATUS Status; 232 ACPI_INTEGER OutQuotient; 233 234 235 ACPI_FUNCTION_TRACE ("AcpiGetTimerDuration"); 236 237 238 if (!TimeElapsed) 239 { 240 return_ACPI_STATUS (AE_BAD_PARAMETER); 241 } 242 243 /* 244 * Compute Tick Delta: 245 * ------------------- 246 * Handle (max one) timer rollovers on 24- versus 32-bit timers. 247 */ 248 if (StartTicks < EndTicks) 249 { 250 DeltaTicks = EndTicks - StartTicks; 251 } 252 else if (StartTicks > EndTicks) 253 { 254 if (0 == AcpiGbl_FADT->TmrValExt) 255 { 256 /* 24-bit Timer */ 257 258 DeltaTicks = (((0x00FFFFFF - StartTicks) + EndTicks) & 0x00FFFFFF); 259 } 260 else 261 { 262 /* 32-bit Timer */ 263 264 DeltaTicks = (0xFFFFFFFF - StartTicks) + EndTicks; 265 } 266 } 267 else 268 { 269 *TimeElapsed = 0; 270 return_ACPI_STATUS (AE_OK); 271 } 272 273 /* 274 * Compute Duration: 275 * ----------------- 276 * 277 * Requires a 64-bit divide: 278 * 279 * TimeElapsed = (DeltaTicks * 1000000) / PM_TIMER_FREQUENCY; 280 */ 281 NormalizedTicks.Full = ((UINT64) DeltaTicks) * 1000000; 282 283 Status = AcpiUtShortDivide (&NormalizedTicks.Full, PM_TIMER_FREQUENCY, 284 &OutQuotient, NULL); 285 286 *TimeElapsed = (UINT32) OutQuotient; 287 return_ACPI_STATUS (Status); 288} 289 290
| 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" 119 120#define _COMPONENT ACPI_HARDWARE 121 ACPI_MODULE_NAME ("hwtimer") 122 123 124/****************************************************************************** 125 * 126 * FUNCTION: AcpiGetTimerResolution 127 * 128 * PARAMETERS: none 129 * 130 * RETURN: Number of bits of resolution in the PM Timer (24 or 32). 131 * 132 * DESCRIPTION: Obtains resolution of the ACPI PM Timer. 133 * 134 ******************************************************************************/ 135 136ACPI_STATUS 137AcpiGetTimerResolution ( 138 UINT32 *Resolution) 139{ 140 ACPI_FUNCTION_TRACE ("AcpiGetTimerResolution"); 141 142 143 if (!Resolution) 144 { 145 return_ACPI_STATUS (AE_BAD_PARAMETER); 146 } 147 148 if (0 == AcpiGbl_FADT->TmrValExt) 149 { 150 *Resolution = 24; 151 } 152 else 153 { 154 *Resolution = 32; 155 } 156 157 return_ACPI_STATUS (AE_OK); 158} 159 160 161/****************************************************************************** 162 * 163 * FUNCTION: AcpiGetTimer 164 * 165 * PARAMETERS: none 166 * 167 * RETURN: Current value of the ACPI PM Timer (in ticks). 168 * 169 * DESCRIPTION: Obtains current value of ACPI PM Timer. 170 * 171 ******************************************************************************/ 172 173ACPI_STATUS 174AcpiGetTimer ( 175 UINT32 *Ticks) 176{ 177 ACPI_STATUS Status; 178 179 180 ACPI_FUNCTION_TRACE ("AcpiGetTimer"); 181 182 183 if (!Ticks) 184 { 185 return_ACPI_STATUS (AE_BAD_PARAMETER); 186 } 187 188 Status = AcpiHwLowLevelRead (32, Ticks, &AcpiGbl_FADT->XPmTmrBlk); 189 190 return_ACPI_STATUS (Status); 191} 192 193 194/****************************************************************************** 195 * 196 * FUNCTION: AcpiGetTimerDuration 197 * 198 * PARAMETERS: StartTicks 199 * EndTicks 200 * TimeElapsed 201 * 202 * RETURN: TimeElapsed 203 * 204 * DESCRIPTION: Computes the time elapsed (in microseconds) between two 205 * PM Timer time stamps, taking into account the possibility of 206 * rollovers, the timer resolution, and timer frequency. 207 * 208 * The PM Timer's clock ticks at roughly 3.6 times per 209 * _microsecond_, and its clock continues through Cx state 210 * transitions (unlike many CPU timestamp counters) -- making it 211 * a versatile and accurate timer. 212 * 213 * Note that this function accommodates only a single timer 214 * rollover. Thus for 24-bit timers, this function should only 215 * be used for calculating durations less than ~4.6 seconds 216 * (~20 minutes for 32-bit timers) -- calculations below 217 * 218 * 2**24 Ticks / 3,600,000 Ticks/Sec = 4.66 sec 219 * 2**32 Ticks / 3,600,000 Ticks/Sec = 1193 sec or 19.88 minutes 220 * 221 ******************************************************************************/ 222 223ACPI_STATUS 224AcpiGetTimerDuration ( 225 UINT32 StartTicks, 226 UINT32 EndTicks, 227 UINT32 *TimeElapsed) 228{ 229 UINT32 DeltaTicks = 0; 230 UINT64_OVERLAY NormalizedTicks; 231 ACPI_STATUS Status; 232 ACPI_INTEGER OutQuotient; 233 234 235 ACPI_FUNCTION_TRACE ("AcpiGetTimerDuration"); 236 237 238 if (!TimeElapsed) 239 { 240 return_ACPI_STATUS (AE_BAD_PARAMETER); 241 } 242 243 /* 244 * Compute Tick Delta: 245 * ------------------- 246 * Handle (max one) timer rollovers on 24- versus 32-bit timers. 247 */ 248 if (StartTicks < EndTicks) 249 { 250 DeltaTicks = EndTicks - StartTicks; 251 } 252 else if (StartTicks > EndTicks) 253 { 254 if (0 == AcpiGbl_FADT->TmrValExt) 255 { 256 /* 24-bit Timer */ 257 258 DeltaTicks = (((0x00FFFFFF - StartTicks) + EndTicks) & 0x00FFFFFF); 259 } 260 else 261 { 262 /* 32-bit Timer */ 263 264 DeltaTicks = (0xFFFFFFFF - StartTicks) + EndTicks; 265 } 266 } 267 else 268 { 269 *TimeElapsed = 0; 270 return_ACPI_STATUS (AE_OK); 271 } 272 273 /* 274 * Compute Duration: 275 * ----------------- 276 * 277 * Requires a 64-bit divide: 278 * 279 * TimeElapsed = (DeltaTicks * 1000000) / PM_TIMER_FREQUENCY; 280 */ 281 NormalizedTicks.Full = ((UINT64) DeltaTicks) * 1000000; 282 283 Status = AcpiUtShortDivide (&NormalizedTicks.Full, PM_TIMER_FREQUENCY, 284 &OutQuotient, NULL); 285 286 *TimeElapsed = (UINT32) OutQuotient; 287 return_ACPI_STATUS (Status); 288} 289 290
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