- Generated on Fri Nov 15 2024 18:01:35 for TianoCore EDK2 by
1.9.6
|
TianoCore EDK2 master
|
Go to the source code of this file.
Functions | |
| UINTN EFIAPI | MicroSecondDelay (IN UINTN MicroSeconds) |
| UINTN EFIAPI | NanoSecondDelay (IN UINTN NanoSeconds) |
| UINT64 EFIAPI | GetPerformanceCounter (VOID) |
| UINT64 EFIAPI | GetPerformanceCounterProperties (OUT UINT64 *StartValue OPTIONAL, OUT UINT64 *EndValue OPTIONAL) |
| UINT64 EFIAPI | GetTimeInNanoSecond (IN UINT64 Ticks) |
Provides calibrated delay and performance counter services.
Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
Definition in file TimerLib.h.
| UINT64 EFIAPI GetPerformanceCounter | ( | VOID | ) |
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().
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().
Retrieves the current value of a 64-bit free running Stable Counter.
The LoongArch defines a constant frequency timer, whose main body is a 64-bit counter called StableCounter. StableCounter is set to 0 after reset, and then increments by 1 every counting clock cycle. When the count reaches all 1s, it automatically wraps around to 0 and continues to increment. The properties of the Stable Counter can be retrieved from GetPerformanceCounterProperties().
Definition at line 139 of file ArmArchTimerLib.c.
| UINT64 EFIAPI GetPerformanceCounterProperties | ( | OUT UINT64 *StartValue | OPTIONAL, |
| OUT UINT64 *EndValue | OPTIONAL | ||
| ) |
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.
| StartValue | The value the performance counter starts with when it rolls over. |
| EndValue | The value that the performance counter ends with before it rolls over. |
Retrieves the 64-bit frequency in Hz and the range of Stable Counter values.
If StartValue is not NULL, then the value that the stbale counter starts with immediately after is it rolls over is returned in StartValue. If EndValue is not NULL, then the value that the stable counter end with immediately before it rolls over is returned in EndValue. The 64-bit frequency of the system frequency in Hz is always returned.
| StartValue | The value the stable counter starts with when it rolls over. |
| EndValue | The value that the stable counter ends with before it rolls over. |
Definition at line 172 of file ArmArchTimerLib.c.
| UINT64 EFIAPI GetTimeInNanoSecond | ( | IN UINT64 | Ticks | ) |
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.
| Ticks | The number of elapsed ticks of running performance counter. |
Definition at line 203 of file ArmArchTimerLib.c.
Stalls the CPU for at least the given number of microseconds.
Stalls the CPU for the number of microseconds specified by MicroSeconds.
| MicroSeconds | The minimum number of microseconds to delay. |
Stalls the CPU for the number of microseconds specified by MicroSeconds.
| MicroSeconds | The minimum number of microseconds to delay. |
Stalls the CPU for at least the given number of microseconds.
Stalls the CPU for the number of microseconds specified by MicroSeconds.
| MicroSeconds | The minimum number of microseconds to delay. |
Stalls the CPU for at least the given number of microseconds.
Stalls the CPU for the number of microseconds specified by MicroSeconds.
| [in] | MicroSeconds | The minimum number of microseconds to delay. |
Definition at line 59 of file ArmArchTimerLib.c.
Stalls the CPU for at least the given number of nanoseconds.
Stalls the CPU for the number of nanoseconds specified by NanoSeconds.
| NanoSeconds | The minimum number of nanoseconds to delay. |
Stalls the CPU for at least the given number of nanoseconds.
Stalls the CPU for the number of nanoseconds specified by NanoSeconds.
When the timer frequency is 1MHz, each tick corresponds to 1 microsecond. Therefore, the nanosecond delay will be rounded up to the nearest 1 microsecond.
| NanoSeconds | The minimum number of nanoseconds to delay. |
Stalls the CPU for at least the given number of nanoseconds.
Stalls the CPU for the number of nanoseconds specified by NanoSeconds.
| NanoSeconds | The minimum number of nanoseconds to delay. |
Definition at line 111 of file ArmArchTimerLib.c.
1.9.6