mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-18 16:32:05 +00:00
12d83106fd
subrepo: subdir: "emummc" merged: "a9d569594" upstream: origin: "https://github.com/m4xw/emummc" branch: "develop" commit: "a9d569594" git-subrepo: version: "0.4.1" origin: "???" commit: "???"
46 lines
1 KiB
C
Vendored
46 lines
1 KiB
C
Vendored
/**
|
|
* @file counter.h
|
|
* @brief AArch64 system counter-timer.
|
|
* @author fincs
|
|
* @copyright libnx Authors
|
|
*/
|
|
#pragma once
|
|
#include "../utils/types.h"
|
|
|
|
/**
|
|
* @brief Gets the current system tick.
|
|
* @return The current system tick.
|
|
*/
|
|
static inline u64 armGetSystemTick(void) {
|
|
u64 ret;
|
|
__asm__ __volatile__ ("mrs %x[data], cntpct_el0" : [data] "=r" (ret));
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Gets the system counter-timer frequency
|
|
* @return The system counter-timer frequency, in Hz.
|
|
*/
|
|
static inline u64 armGetSystemTickFreq(void) {
|
|
u64 ret;
|
|
__asm__ ("mrs %x[data], cntfrq_el0" : [data] "=r" (ret));
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Converts from nanoseconds to CPU ticks unit.
|
|
* @param ns Time in nanoseconds.
|
|
* @return Time in CPU ticks.
|
|
*/
|
|
static inline u64 armNsToTicks(u64 ns) {
|
|
return (ns * 12) / 625;
|
|
}
|
|
|
|
/**
|
|
* @brief Converts from CPU ticks unit to nanoseconds.
|
|
* @param tick Time in ticks.
|
|
* @return Time in nanoseconds.
|
|
*/
|
|
static inline u64 armTicksToNs(u64 tick) {
|
|
return (tick * 625) / 12;
|
|
}
|