diff options
Diffstat (limited to 'OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c')
| -rw-r--r-- | OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c b/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c deleted file mode 100644 index 938b77cdc6..0000000000 --- a/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c +++ /dev/null @@ -1,216 +0,0 @@ -/** @file
- ACPI Timer implements one instance of Timer Library.
-
- Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
- Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>
-
- This program and the accompanying materials are
- licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-#include <Library/DebugLib.h>
-#include <Library/BaseLib.h>
-#include <IndustryStandard/Acpi.h>
-
-#include "AcpiTimerLib.h"
-
-//
-// The ACPI Time is a 24-bit counter
-//
-#define ACPI_TIMER_COUNT_SIZE BIT24
-
-/**
- Stalls the CPU for at least the given number of ticks.
-
- Stalls the CPU for at least the given number of ticks. It's invoked by
- MicroSecondDelay() and NanoSecondDelay().
-
- @param Delay A period of time to delay in ticks.
-
-**/
-VOID
-InternalAcpiDelay (
- IN UINT32 Delay
- )
-{
- UINT32 Ticks;
- UINT32 Times;
-
- Times = Delay >> 22;
- Delay &= BIT22 - 1;
- do {
- //
- // The target timer count is calculated here
- //
- Ticks = InternalAcpiGetTimerTick () + Delay;
- Delay = BIT22;
- //
- // Wait until time out
- // Delay >= 2^23 could not be handled by this function
- // Timer wrap-arounds are handled correctly by this function
- //
- while (((Ticks - InternalAcpiGetTimerTick ()) & BIT23) == 0) {
- CpuPause ();
- }
- } while (Times-- > 0);
-}
-
-/**
- Stalls the CPU for at least the given number of microseconds.
-
- Stalls the CPU for the number of microseconds specified by MicroSeconds.
-
- @param MicroSeconds The minimum number of microseconds to delay.
-
- @return MicroSeconds
-
-**/
-UINTN
-EFIAPI
-MicroSecondDelay (
- IN UINTN MicroSeconds
- )
-{
- InternalAcpiDelay (
- (UINT32)DivU64x32 (
- MultU64x32 (
- MicroSeconds,
- ACPI_TIMER_FREQUENCY
- ),
- 1000000u
- )
- );
- return MicroSeconds;
-}
-
-/**
- Stalls the CPU for at least the given number of nanoseconds.
-
- Stalls the CPU for the number of nanoseconds specified by NanoSeconds.
-
- @param NanoSeconds The minimum number of nanoseconds to delay.
-
- @return NanoSeconds
-
-**/
-UINTN
-EFIAPI
-NanoSecondDelay (
- IN UINTN NanoSeconds
- )
-{
- InternalAcpiDelay (
- (UINT32)DivU64x32 (
- MultU64x32 (
- NanoSeconds,
- ACPI_TIMER_FREQUENCY
- ),
- 1000000000u
- )
- );
- return NanoSeconds;
-}
-
-/**
- Retrieves the current value of a 64-bit free running performance counter.
-
- Retrieves the current value of a 64-bit free running performance counter. The
- counter can either count up by 1 or count down by 1. If the physical
- performance counter counts by a larger increment, then the counter values
- must be translated. The properties of the counter can be retrieved from
- GetPerformanceCounterProperties().
-
- @return The current value of the free running performance counter.
-
-**/
-UINT64
-EFIAPI
-GetPerformanceCounter (
- VOID
- )
-{
- return (UINT64)InternalAcpiGetTimerTick ();
-}
-
-/**
- Retrieves the 64-bit frequency in Hz and the range of performance counter
- values.
-
- If StartValue is not NULL, then the value that the performance counter starts
- with immediately after is it rolls over is returned in StartValue. If
- EndValue is not NULL, then the value that the performance counter end with
- immediately before it rolls over is returned in EndValue. The 64-bit
- frequency of the performance counter in Hz is always returned. If StartValue
- is less than EndValue, then the performance counter counts up. If StartValue
- is greater than EndValue, then the performance counter counts down. For
- example, a 64-bit free running counter that counts up would have a StartValue
- of 0 and an EndValue of 0xFFFFFFFFFFFFFFFF. A 24-bit free running counter
- that counts down would have a StartValue of 0xFFFFFF and an EndValue of 0.
-
- @param StartValue The value the performance counter starts with when it
- rolls over.
- @param EndValue The value that the performance counter ends with before
- it rolls over.
-
- @return The frequency in Hz.
-
-**/
-UINT64
-EFIAPI
-GetPerformanceCounterProperties (
- OUT UINT64 *StartValue, OPTIONAL
- OUT UINT64 *EndValue OPTIONAL
- )
-{
- if (StartValue != NULL) {
- *StartValue = 0;
- }
-
- if (EndValue != NULL) {
- *EndValue = ACPI_TIMER_COUNT_SIZE - 1;
- }
-
- return ACPI_TIMER_FREQUENCY;
-}
-
-/**
- Converts elapsed ticks of performance counter to time in nanoseconds.
-
- This function converts the elapsed ticks of running performance counter to
- time value in unit of nanoseconds.
-
- @param Ticks The number of elapsed ticks of running performance counter.
-
- @return The elapsed time in nanoseconds.
-
-**/
-UINT64
-EFIAPI
-GetTimeInNanoSecond (
- IN UINT64 Ticks
- )
-{
- UINT64 NanoSeconds;
- UINT32 Remainder;
-
- //
- // Ticks
- // Time = --------- x 1,000,000,000
- // Frequency
- //
- NanoSeconds = MultU64x32 (DivU64x32Remainder (Ticks, ACPI_TIMER_FREQUENCY, &Remainder), 1000000000u);
-
- //
- // Frequency < 0x100000000, so Remainder < 0x100000000, then (Remainder * 1,000,000,000)
- // will not overflow 64-bit.
- //
- NanoSeconds += DivU64x32 (MultU64x32 ((UINT64) Remainder, 1000000000u), ACPI_TIMER_FREQUENCY);
-
- return NanoSeconds;
-}
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