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.
SPDXLicenseIdentifier: BSD2ClausePatent
Definition in file TimerLib.h.
UINT64 EFIAPI GetPerformanceCounter  (  VOID  ) 
Retrieves the current value of a 64bit 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 64bit free running performance counter.
Retrieves the current value of a 64bit 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().
Definition at line 184 of file ArmArchTimerLib.c.
UINT64 EFIAPI GetPerformanceCounterProperties  (  OUT UINT64 *StartValue  OPTIONAL, 
OUT UINT64 *EndValue  OPTIONAL  
) 
Retrieves the 64bit 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 64bit 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 64bit free running counter that counts up would have a StartValue of 0 and an EndValue of 0xFFFFFFFFFFFFFFFF. A 24bit 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. 
Definition at line 217 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 248 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 110 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 156 of file ArmArchTimerLib.c.