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Kernel: Set up and calibrate APIC timer, and enable timer on all CPUs

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This enables the APIC timer on all CPUs, which means Scheduler::timer_tick
is now called on all CPUs independently. We still don't do anything on
the APs as it instantly crashes due to a number of other problems.
This commit is contained in:
Tom 2020-10-25 09:13:47 -06:00 • committed by Andreas Kling
parent 9d347352a1
commit fe615e601a
14 changed files with 478 additions and 70 deletions
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17
Kernel/Time/TimeManagement.h
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@ -35,7 +35,7 @@ namespace Kernel {
#define OPTIMAL_TICKS_PER_SECOND_RATE 1000
class HardwareTimer;
class HardwareTimerBase;
class TimeManagement {
AK_MAKE_ETERNAL;
@ -43,7 +43,7 @@ class TimeManagement {
public:
TimeManagement();
static bool initialized();
static void initialize();
static void initialize(u32 cpu);
static TimeManagement& the();
timespec epoch_time() const;
@ -53,7 +53,7 @@ public:
time_t ticks_this_second() const;
time_t boot_time() const;
bool is_system_timer(const HardwareTimer&) const;
bool is_system_timer(const HardwareTimerBase&) const;
static void update_time(const RegisterState&);
void increment_time_since_boot(const RegisterState&);
@ -65,15 +65,16 @@ public:
private:
bool probe_and_set_legacy_hardware_timers();
bool probe_and_set_non_legacy_hardware_timers();
Vector<HardwareTimer*> scan_and_initialize_periodic_timers();
Vector<HardwareTimer*> scan_for_non_periodic_timers();
NonnullRefPtrVector<HardwareTimer> m_hardware_timers;
Vector<HardwareTimerBase*> scan_and_initialize_periodic_timers();
Vector<HardwareTimerBase*> scan_for_non_periodic_timers();
NonnullRefPtrVector<HardwareTimerBase> m_hardware_timers;
void set_system_timer(HardwareTimerBase&);
u32 m_ticks_this_second { 0 };
u32 m_seconds_since_boot { 0 };
timespec m_epoch_time { 0, 0 };
RefPtr<HardwareTimer> m_system_timer;
RefPtr<HardwareTimer> m_time_keeper_timer;
RefPtr<HardwareTimerBase> m_system_timer;
RefPtr<HardwareTimerBase> m_time_keeper_timer;
};
}