Luna/kernel/src/arch/Timer.cpp

#include "arch/Timer.h"

static u64 timer_ticks = 0;
static u64 boot_timestamp;

namespace Timer
{
    void tick()
    {
        timer_ticks++;
    }

    usize ticks()
    {
        return ticks_ms() / 1000;
    }

    usize ticks_ms()
    {
        return timer_ticks / ARCH_TIMER_FREQ;
    }

    usize ticks_us() // We want a bit of precision; if there are 10 ticks/ms, do not return the truncated ms value *
                     // 1000, but ticks * 100 (1000/10), which is more precise
    {
        if (ARCH_TIMER_FREQ > 1000) [[unlikely]]
            return timer_ticks / (ARCH_TIMER_FREQ / 1000);
        return timer_ticks * (1000 / ARCH_TIMER_FREQ);
    }

    usize ticks_ns()
    {
        return ticks_us() * 1000;
    }

    usize boot()
    {
        return boot_timestamp;
    }

    usize boot_ms()
    {
        return boot_timestamp * MS_PER_SECOND;
    }

    usize boot_us()
    {
        return boot_timestamp * US_PER_SECOND;
    }

    usize boot_ns()
    {
        return boot_timestamp * NS_PER_SECOND;
    }

    usize clock()
    {
        return boot() + ticks();
    }

    usize clock_ms()
    {
        return boot_ms() + ticks_ms();
    }

    usize clock_us()
    {
        return boot_us() + ticks_us();
    }

    usize clock_ns()
    {
        return boot_ns() + ticks_ns();
    }

    void init()
    {
        arch_init();
    }
}