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Kernel: Make PIT counter atomic with spinlock

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Bananymous
2024-07-21 18:56:41 +03:00
parent e00efca170
commit 8fe798de6d
2 changed files with 17 additions and 5 deletions
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17
kernel/kernel/Timer/PIT.cpp
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@@ -54,23 +54,32 @@ namespace Kernel
void PIT::handle_irq()
{
m_system_time = m_system_time + 1;
{
SpinLockGuard _(m_lock);
m_system_time++;
}
Kernel::Scheduler::get().timer_reschedule();
}
uint64_t PIT::read_counter() const
{
SpinLockGuard _(m_lock);
return m_system_time;
}
uint64_t PIT::ms_since_boot() const
{
return m_system_time * (MS_PER_S / TICKS_PER_SECOND);
return read_counter() * (MS_PER_S / TICKS_PER_SECOND);
}
uint64_t PIT::ns_since_boot() const
{
return m_system_time * (NS_PER_S / TICKS_PER_SECOND);
return read_counter() * (NS_PER_S / TICKS_PER_SECOND);
}
timespec PIT::time_since_boot() const
{
uint64_t ticks = m_system_time;
uint64_t ticks = read_counter();
return timespec {
.tv_sec = ticks / TICKS_PER_SECOND,
.tv_nsec = (long)((ticks % TICKS_PER_SECOND) * (NS_PER_S / TICKS_PER_SECOND))