Matías Locatti
GitHub
commit
e44d1fe73c
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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "core/core.h"
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#include "core/core_timing.h"
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#include "core/hle/kernel/k_hardware_timer.h"
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#include "core/hle/kernel/k_scheduler.h"
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namespace Kernel {
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void KHardwareTimer::Initialize() {
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// Create the timing callback to register with CoreTiming.
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m_event_type = Core::Timing::CreateEvent(
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"KHardwareTimer::Callback", [](std::uintptr_t timer_handle, s64, std::chrono::nanoseconds) {
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reinterpret_cast<KHardwareTimer*>(timer_handle)->DoTask();
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return std::nullopt;
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});
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}
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void KHardwareTimer::Finalize() {
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this->DisableInterrupt();
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m_event_type.reset();
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}
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void KHardwareTimer::DoTask() {
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// Handle the interrupt.
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{
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KScopedSchedulerLock slk{m_kernel};
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KScopedSpinLock lk(this->GetLock());
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//! Ignore this event if needed.
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if (!this->GetInterruptEnabled()) {
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return;
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}
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// Disable the timer interrupt while we handle this.
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this->DisableInterrupt();
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if (const s64 next_time = this->DoInterruptTaskImpl(GetTick());
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0 < next_time && next_time <= m_wakeup_time) {
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// We have a next time, so we should set the time to interrupt and turn the interrupt
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// on.
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this->EnableInterrupt(next_time);
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}
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}
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// Clear the timer interrupt.
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// Kernel::GetInterruptManager().ClearInterrupt(KInterruptName_NonSecurePhysicalTimer,
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// GetCurrentCoreId());
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}
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void KHardwareTimer::EnableInterrupt(s64 wakeup_time) {
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this->DisableInterrupt();
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m_wakeup_time = wakeup_time;
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m_kernel.System().CoreTiming().ScheduleEvent(std::chrono::nanoseconds{m_wakeup_time},
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m_event_type, reinterpret_cast<uintptr_t>(this),
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true);
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}
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void KHardwareTimer::DisableInterrupt() {
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m_kernel.System().CoreTiming().UnscheduleEvent(m_event_type, reinterpret_cast<uintptr_t>(this));
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m_wakeup_time = std::numeric_limits<s64>::max();
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}
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s64 KHardwareTimer::GetTick() const {
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return m_kernel.System().CoreTiming().GetGlobalTimeNs().count();
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}
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bool KHardwareTimer::GetInterruptEnabled() {
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return m_wakeup_time != std::numeric_limits<s64>::max();
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}
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} // namespace Kernel
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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include "core/hle/kernel/k_hardware_timer_base.h"
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namespace Core::Timing {
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struct EventType;
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} // namespace Core::Timing
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namespace Kernel {
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class KHardwareTimer : /* public KInterruptTask, */ public KHardwareTimerBase {
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public:
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explicit KHardwareTimer(KernelCore& kernel) : KHardwareTimerBase{kernel} {}
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// Public API.
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void Initialize();
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void Finalize();
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s64 GetCount() const {
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return GetTick();
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}
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void RegisterTask(KTimerTask* task, s64 time_from_now) {
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this->RegisterAbsoluteTask(task, GetTick() + time_from_now);
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}
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void RegisterAbsoluteTask(KTimerTask* task, s64 task_time) {
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KScopedDisableDispatch dd{m_kernel};
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KScopedSpinLock lk{this->GetLock()};
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if (this->RegisterAbsoluteTaskImpl(task, task_time)) {
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if (task_time <= m_wakeup_time) {
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this->EnableInterrupt(task_time);
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}
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}
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}
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private:
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void EnableInterrupt(s64 wakeup_time);
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void DisableInterrupt();
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bool GetInterruptEnabled();
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s64 GetTick() const;
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void DoTask();
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private:
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// Absolute time in nanoseconds
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s64 m_wakeup_time{std::numeric_limits<s64>::max()};
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std::shared_ptr<Core::Timing::EventType> m_event_type{};
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};
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} // namespace Kernel
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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include "core/hle/kernel/k_spin_lock.h"
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#include "core/hle/kernel/k_thread.h"
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#include "core/hle/kernel/k_timer_task.h"
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namespace Kernel {
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class KHardwareTimerBase {
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public:
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explicit KHardwareTimerBase(KernelCore& kernel) : m_kernel{kernel} {}
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void CancelTask(KTimerTask* task) {
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KScopedDisableDispatch dd{m_kernel};
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KScopedSpinLock lk{m_lock};
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if (const s64 task_time = task->GetTime(); task_time > 0) {
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this->RemoveTaskFromTree(task);
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}
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}
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protected:
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KSpinLock& GetLock() {
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return m_lock;
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}
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s64 DoInterruptTaskImpl(s64 cur_time) {
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// We want to handle all tasks, returning the next time that a task is scheduled.
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while (true) {
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// Get the next task. If there isn't one, return 0.
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KTimerTask* task = m_next_task;
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if (task == nullptr) {
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return 0;
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}
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// If the task needs to be done in the future, do it in the future and not now.
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if (const s64 task_time = task->GetTime(); task_time > cur_time) {
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return task_time;
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}
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// Remove the task from the tree of tasks, and update our next task.
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this->RemoveTaskFromTree(task);
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// Handle the task.
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task->OnTimer();
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}
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}
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bool RegisterAbsoluteTaskImpl(KTimerTask* task, s64 task_time) {
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ASSERT(task_time > 0);
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// Set the task's time, and insert it into our tree.
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task->SetTime(task_time);
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m_task_tree.insert(*task);
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// Update our next task if relevant.
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if (m_next_task != nullptr && m_next_task->GetTime() <= task_time) {
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return false;
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}
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m_next_task = task;
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return true;
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}
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private:
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void RemoveTaskFromTree(KTimerTask* task) {
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// Erase from the tree.
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auto it = m_task_tree.erase(m_task_tree.iterator_to(*task));
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// Clear the task's scheduled time.
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task->SetTime(0);
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// Update our next task if relevant.
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if (m_next_task == task) {
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m_next_task = (it != m_task_tree.end()) ? std::addressof(*it) : nullptr;
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}
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}
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protected:
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KernelCore& m_kernel;
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private:
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using TimerTaskTree = Common::IntrusiveRedBlackTreeBaseTraits<KTimerTask>::TreeType<KTimerTask>;
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KSpinLock m_lock{};
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TimerTaskTree m_task_tree{};
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KTimerTask* m_next_task{};
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};
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} // namespace Kernel
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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include "common/intrusive_red_black_tree.h"
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namespace Kernel {
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class KTimerTask : public Common::IntrusiveRedBlackTreeBaseNode<KTimerTask> {
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public:
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static constexpr int Compare(const KTimerTask& lhs, const KTimerTask& rhs) {
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if (lhs.GetTime() < rhs.GetTime()) {
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return -1;
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} else {
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return 1;
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}
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}
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constexpr explicit KTimerTask() = default;
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constexpr void SetTime(s64 t) {
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m_time = t;
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}
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constexpr s64 GetTime() const {
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return m_time;
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}
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// NOTE: This is virtual in Nintendo's kernel. Prior to 13.0.0, KWaitObject was also a
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// TimerTask; this is no longer the case. Since this is now KThread exclusive, we have
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// devirtualized (see inline declaration for this inside k_thread.h).
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void OnTimer();
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private:
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// Absolute time in nanoseconds
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s64 m_time{};
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};
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} // namespace Kernel
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@ -1,44 +0,0 @@
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// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "common/assert.h"
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#include "core/core.h"
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#include "core/core_timing.h"
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#include "core/hle/kernel/k_scheduler.h"
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#include "core/hle/kernel/k_thread.h"
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#include "core/hle/kernel/time_manager.h"
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namespace Kernel {
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TimeManager::TimeManager(Core::System& system_) : system{system_} {
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time_manager_event_type = Core::Timing::CreateEvent(
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"Kernel::TimeManagerCallback",
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[this](std::uintptr_t thread_handle, s64 time,
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std::chrono::nanoseconds) -> std::optional<std::chrono::nanoseconds> {
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KThread* thread = reinterpret_cast<KThread*>(thread_handle);
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{
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KScopedSchedulerLock sl(system.Kernel());
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thread->OnTimer();
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}
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return std::nullopt;
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});
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}
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void TimeManager::ScheduleTimeEvent(KThread* thread, s64 nanoseconds) {
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std::scoped_lock lock{mutex};
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if (nanoseconds > 0) {
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ASSERT(thread);
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ASSERT(thread->GetState() != ThreadState::Runnable);
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system.CoreTiming().ScheduleEvent(std::chrono::nanoseconds{nanoseconds},
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time_manager_event_type,
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reinterpret_cast<uintptr_t>(thread));
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}
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}
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void TimeManager::UnscheduleTimeEvent(KThread* thread) {
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std::scoped_lock lock{mutex};
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system.CoreTiming().UnscheduleEvent(time_manager_event_type,
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reinterpret_cast<uintptr_t>(thread));
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}
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} // namespace Kernel
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@ -1,41 +0,0 @@
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// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <memory>
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#include <mutex>
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namespace Core {
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class System;
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} // namespace Core
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namespace Core::Timing {
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struct EventType;
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} // namespace Core::Timing
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namespace Kernel {
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class KThread;
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/**
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* The `TimeManager` takes care of scheduling time events on threads and executes their TimeUp
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* method when the event is triggered.
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*/
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class TimeManager {
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public:
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explicit TimeManager(Core::System& system);
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/// Schedule a time event on `timetask` thread that will expire in 'nanoseconds'
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void ScheduleTimeEvent(KThread* time_task, s64 nanoseconds);
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/// Unschedule an existing time event
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void UnscheduleTimeEvent(KThread* thread);
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private:
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Core::System& system;
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std::shared_ptr<Core::Timing::EventType> time_manager_event_type;
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std::mutex mutex;
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};
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} // namespace Kernel
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