mirror of
https://github.com/Atmosphere-NX/Atmosphere
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80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern::arm64 {
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namespace impl {
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class KHardwareTimerInterruptTask : public KInterruptTask {
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public:
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constexpr KHardwareTimerInterruptTask() : KInterruptTask() { /* ... */ }
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virtual KInterruptTask *OnInterrupt(s32 interrupt_id) override {
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return this;
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}
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virtual void DoTask() override {
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Kernel::GetHardwareTimer().DoInterruptTask();
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}
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};
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}
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namespace {
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/* One global hardware timer interrupt task per core. */
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impl::KHardwareTimerInterruptTask g_hardware_timer_interrupt_tasks[cpu::NumCores];
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ALWAYS_INLINE auto *GetHardwareTimerInterruptTask(s32 core_id) {
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return std::addressof(g_hardware_timer_interrupt_tasks[core_id]);
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}
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}
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void KHardwareTimer::Initialize(s32 core_id) {
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/* Setup the global timer for the core. */
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InitializeGlobalTimer();
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/* Bind the interrupt task for this core. */
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Kernel::GetInterruptManager().BindHandler(GetHardwareTimerInterruptTask(core_id), KInterruptName_NonSecurePhysicalTimer, core_id, KInterruptController::PriorityLevel_Timer, true, true);
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}
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void KHardwareTimer::Finalize() {
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/* Stop the hardware timer. */
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StopTimer();
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}
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void KHardwareTimer::DoInterruptTask() {
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/* Handle the interrupt. */
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{
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KScopedSchedulerLock slk;
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KScopedSpinLock lk(this->GetLock());
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/* Disable the timer interrupt while we handle this. */
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DisableInterrupt();
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if (const s64 next_time = this->DoInterruptTaskImpl(GetTick()); next_time > 0) {
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/* We have a next time, so we should set the time to interrupt and turn the interrupt on. */
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SetCompareValue(next_time);
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EnableInterrupt();
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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, GetCurrentCoreId());
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}
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}
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