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Diffstat (limited to 'sys/contrib/dev/acpica/Subsystem/Hardware/hwtimer.c')
| -rw-r--r-- | sys/contrib/dev/acpica/Subsystem/Hardware/hwtimer.c | 307 |
1 files changed, 0 insertions, 307 deletions
diff --git a/sys/contrib/dev/acpica/Subsystem/Hardware/hwtimer.c b/sys/contrib/dev/acpica/Subsystem/Hardware/hwtimer.c deleted file mode 100644 index 52139ed6a25b..000000000000 --- a/sys/contrib/dev/acpica/Subsystem/Hardware/hwtimer.c +++ /dev/null @@ -1,307 +0,0 @@ - -/****************************************************************************** - * - * Name: hwtimer.c - ACPI Power Management Timer Interface - * $Revision: 5 $ - * - *****************************************************************************/ - -/****************************************************************************** - * - * 1. Copyright Notice - * - * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. - * All rights reserved. - * - * 2. License - * - * 2.1. This is your license from Intel Corp. under its intellectual property - * rights. You may have additional license terms from the party that provided - * you this software, covering your right to use that party's intellectual - * property rights. - * - * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a - * copy of the source code appearing in this file ("Covered Code") an - * irrevocable, perpetual, worldwide license under Intel's copyrights in the - * base code distributed originally by Intel ("Original Intel Code") to copy, - * make derivatives, distribute, use and display any portion of the Covered - * Code in any form, with the right to sublicense such rights; and - * - * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent - * license (with the right to sublicense), under only those claims of Intel - * patents that are infringed by the Original Intel Code, to make, use, sell, - * offer to sell, and import the Covered Code and derivative works thereof - * solely to the minimum extent necessary to exercise the above copyright - * license, and in no event shall the patent license extend to any additions - * to or modifications of the Original Intel Code. No other license or right - * is granted directly or by implication, estoppel or otherwise; - * - * The above copyright and patent license is granted only if the following - * conditions are met: - * - * 3. Conditions - * - * 3.1. Redistribution of Source with Rights to Further Distribute Source. - * Redistribution of source code of any substantial portion of the Covered - * Code or modification with rights to further distribute source must include - * the above Copyright Notice, the above License, this list of Conditions, - * and the following Disclaimer and Export Compliance provision. In addition, - * Licensee must cause all Covered Code to which Licensee contributes to - * contain a file documenting the changes Licensee made to create that Covered - * Code and the date of any change. Licensee must include in that file the - * documentation of any changes made by any predecessor Licensee. Licensee - * must include a prominent statement that the modification is derived, - * directly or indirectly, from Original Intel Code. - * - * 3.2. Redistribution of Source with no Rights to Further Distribute Source. - * Redistribution of source code of any substantial portion of the Covered - * Code or modification without rights to further distribute source must - * include the following Disclaimer and Export Compliance provision in the - * documentation and/or other materials provided with distribution. In - * addition, Licensee may not authorize further sublicense of source of any - * portion of the Covered Code, and must include terms to the effect that the - * license from Licensee to its licensee is limited to the intellectual - * property embodied in the software Licensee provides to its licensee, and - * not to intellectual property embodied in modifications its licensee may - * make. - * - * 3.3. Redistribution of Executable. Redistribution in executable form of any - * substantial portion of the Covered Code or modification must reproduce the - * above Copyright Notice, and the following Disclaimer and Export Compliance - * provision in the documentation and/or other materials provided with the - * distribution. - * - * 3.4. Intel retains all right, title, and interest in and to the Original - * Intel Code. - * - * 3.5. Neither the name Intel nor any other trademark owned or controlled by - * Intel shall be used in advertising or otherwise to promote the sale, use or - * other dealings in products derived from or relating to the Covered Code - * without prior written authorization from Intel. - * - * 4. Disclaimer and Export Compliance - * - * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED - * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE - * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, - * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY - * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY - * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A - * PARTICULAR PURPOSE. - * - * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES - * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR - * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, - * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY - * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL - * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS - * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY - * LIMITED REMEDY. - * - * 4.3. Licensee shall not export, either directly or indirectly, any of this - * software or system incorporating such software without first obtaining any - * required license or other approval from the U. S. Department of Commerce or - * any other agency or department of the United States Government. In the - * event Licensee exports any such software from the United States or - * re-exports any such software from a foreign destination, Licensee shall - * ensure that the distribution and export/re-export of the software is in - * compliance with all laws, regulations, orders, or other restrictions of the - * U.S. Export Administration Regulations. Licensee agrees that neither it nor - * any of its subsidiaries will export/re-export any technical data, process, - * software, or service, directly or indirectly, to any country for which the - * United States government or any agency thereof requires an export license, - * other governmental approval, or letter of assurance, without first obtaining - * such license, approval or letter. - * - *****************************************************************************/ - -#include "acpi.h" -#include "achware.h" - -#define _COMPONENT HARDWARE - MODULE_NAME ("hwtimer") - - -/****************************************************************************** - * - * FUNCTION: AcpiGetTimerResolution - * - * PARAMETERS: none - * - * RETURN: Number of bits of resolution in the PM Timer (24 or 32). - * - * DESCRIPTION: Obtains resolution of the ACPI PM Timer. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiGetTimerResolution ( - UINT32 *Resolution) -{ - FUNCTION_TRACE ("AcpiGetTimerResolution"); - - if (!Resolution) - { - return_ACPI_STATUS (AE_BAD_PARAMETER); - } - - if (0 == AcpiGbl_FADT->TmrValExt) - { - *Resolution = 24; - } - else - { - *Resolution = 32; - } - - return_ACPI_STATUS (AE_OK); -} - - -/****************************************************************************** - * - * FUNCTION: AcpiGetTimer - * - * PARAMETERS: none - * - * RETURN: Current value of the ACPI PM Timer (in ticks). - * - * DESCRIPTION: Obtains current value of ACPI PM Timer. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiGetTimer ( - UINT32 *Ticks) -{ - FUNCTION_TRACE ("AcpiGetTimer"); - - if (!Ticks) - { - return_ACPI_STATUS (AE_BAD_PARAMETER); - } - - *Ticks = AcpiOsIn32 ((ACPI_IO_ADDRESS) ACPI_GET_ADDRESS (AcpiGbl_FADT->XPmTmrBlk.Address)); - - return_ACPI_STATUS (AE_OK); -} - - -/****************************************************************************** - * - * FUNCTION: AcpiGetTimerDuration - * - * PARAMETERS: StartTicks - * EndTicks - * TimeElapsed - * - * RETURN: TimeElapsed - * - * DESCRIPTION: Computes the time elapsed (in microseconds) between two - * PM Timer time stamps, taking into account the possibility of - * rollovers, the timer resolution, and timer frequency. - * - * The PM Timer's clock ticks at roughly 3.6 times per - * _microsecond_, and its clock continues through Cx state - * transitions (unlike many CPU timestamp counters) -- making it - * a versatile and accurate timer. - * - * Note that this function accomodates only a single timer - * rollover. Thus for 24-bit timers, this function should only - * be used for calculating durations less than ~4.6 seconds - * (~20 hours for 32-bit timers). - * - ******************************************************************************/ - -ACPI_STATUS -AcpiGetTimerDuration ( - UINT32 StartTicks, - UINT32 EndTicks, - UINT32 *TimeElapsed) -{ - UINT32 DeltaTicks = 0; - UINT32 Seconds = 0; - UINT32 Milliseconds = 0; - UINT32 Microseconds = 0; - UINT32 Remainder = 0; - - FUNCTION_TRACE ("AcpiGetTimerDuration"); - - if (!TimeElapsed) - { - return_ACPI_STATUS (AE_BAD_PARAMETER); - } - - /* - * Compute Tick Delta: - * ------------------- - * Handle (max one) timer rollovers on 24- versus 32-bit timers. - */ - if (StartTicks < EndTicks) - { - DeltaTicks = EndTicks - StartTicks; - } - else if (StartTicks > EndTicks) - { - /* 24-bit Timer */ - if (0 == AcpiGbl_FADT->TmrValExt) - { - DeltaTicks = (((0x00FFFFFF - StartTicks) + EndTicks) & 0x00FFFFFF); - } - /* 32-bit Timer */ - else - { - DeltaTicks = (0xFFFFFFFF - StartTicks) + EndTicks; - } - } - else - { - *TimeElapsed = 0; - return_ACPI_STATUS (AE_OK); - } - - /* - * Compute Duration: - * ----------------- - * Since certain compilers (gcc/Linux, argh!) don't support 64-bit - * divides in kernel-space we have to do some trickery to preserve - * accuracy while using 32-bit math. - * - * TODO: Change to use 64-bit math when supported. - * - * The process is as follows: - * 1. Compute the number of seconds by dividing Delta Ticks by - * the timer frequency. - * 2. Compute the number of milliseconds in the remainder from step #1 - * by multiplying by 1000 and then dividing by the timer frequency. - * 3. Compute the number of microseconds in the remainder from step #2 - * by multiplying by 1000 and then dividing by the timer frequency. - * 4. Add the results from steps 1, 2, and 3 to get the total duration. - * - * Example: The time elapsed for DeltaTicks = 0xFFFFFFFF should be - * 1199864031 microseconds. This is computed as follows: - * Step #1: Seconds = 1199; Remainder = 3092840 - * Step #2: Milliseconds = 864; Remainder = 113120 - * Step #3: Microseconds = 31; Remainder = <don't care!> - */ - - /* Step #1 */ - Seconds = DeltaTicks / PM_TIMER_FREQUENCY; - Remainder = DeltaTicks % PM_TIMER_FREQUENCY; - - /* Step #2 */ - Milliseconds = (Remainder * 1000) / PM_TIMER_FREQUENCY; - Remainder = (Remainder * 1000) % PM_TIMER_FREQUENCY; - - /* Step #3 */ - Microseconds = (Remainder * 1000) / PM_TIMER_FREQUENCY; - - /* Step #4 */ - *TimeElapsed = Seconds * 1000000; - *TimeElapsed += Milliseconds * 1000; - *TimeElapsed += Microseconds; - - return_ACPI_STATUS (AE_OK); -} - - |